EP2336991A1 - Smoke alarm - Google Patents

Smoke alarm Download PDF

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Publication number
EP2336991A1
EP2336991A1 EP10013581A EP10013581A EP2336991A1 EP 2336991 A1 EP2336991 A1 EP 2336991A1 EP 10013581 A EP10013581 A EP 10013581A EP 10013581 A EP10013581 A EP 10013581A EP 2336991 A1 EP2336991 A1 EP 2336991A1
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EP
European Patent Office
Prior art keywords
head
housing part
rotation
smoke detector
detector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10013581A
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German (de)
French (fr)
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EP2336991B1 (en
Inventor
Gerhard Niederfeld
Franko Seeliger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ista International GmbH
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Ista International GmbH
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Publication of EP2336991A1 publication Critical patent/EP2336991A1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/06—Mechanical actuation by tampering with fastening
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the invention relates to a smoke detector comprising an upper, in particular raumcomb wornes housing part and a lower, in particular room-side housing part, which are connectable to each other by means of a positive, releasable rotary connection, wherein a device for detecting smoke is arranged between the housing parts.
  • Smoke detectors of this type are known in the art to monitor rooms, such as living spaces, for the presence of smoke, such as those created by fires, and, if necessary, issue an alarm.
  • a device arranged between the housing parts for smoke detection usually comprises an optical detection path with a light-emitting element and a scattered light detecting sensor that detects stray light when the emitted light was scattered on smoke particles in the air.
  • smoke detectors are or become mandatory, whereby, for example, a landlord is required to prove that he has used a smoke detector properly. It is known that often smoke detectors, even if only temporarily, are dismantled, for example, for renovation purposes and then reinstalled, which is not done by professionals and the function of the smoke detector is uncertain. At such a refitted smoke detector, however, the interim successive manipulation can not be detected.
  • the lower housing part has a housing part from the surface movable display element having a extending to the bottom of the upper housing portion web, the ground-facing end has a separable from the web head and the bottom is arranged an engagement region with which the head is engageable by rotation of the lower relative to the upper housing part during fastening and is detachable from the web upon rotation upon release.
  • the essential core idea of the invention is to provide an indication on the smoke detector, from which it can be clearly seen that a smoke detector has been dismantled after an original assembly.
  • the construction is chosen so that a display element, which is provided on the lower housing part and which can thus be easily seen from the room when looking to the ceiling by means of the web with the bottom of the upper housing part mounted on the ceiling first during initial installation combines.
  • the connection takes place between the head at the bottom end of the web and an engagement region which is arranged on or in the ground.
  • the rotary joint may e.g. via a realized between the housing parts thread, a Renktagen, in particular bayonet connection or other connection, which leads relative to each other upon rotation of the housing parts for positive engagement between them. It may be provided that the positive engagement and thus the connection of the housing parts to each other already at a rotational angle of less than 180 degrees, preferably less than 90 degrees, even more preferably between 40 and 60 degrees.
  • the display element which is movable out of the housing part surface of the lower housing part is therefore moved out of the housing part surface for lack of attachment to the bottom of the upper housing either already by the acting gravity or in another embodiment due to a force load in the outward direction from the housing part surface and thus faces this out, especially from the ceiling into the room, so that it is easily recognizable and indicates an intermediate disassembly.
  • a smoke detector thus indicates its manipulation and can be checked.
  • the said force load can be generated for example by a spring element.
  • a spring element can be realized by a separate spring, for example compression spring. It can be provided for any kind of outward movement that this is done captive, ie the display element is indeed moved out of the surface, but does not fall completely out of the lower housing part.
  • a region of the lower housing part lying opposite the bottom of the upper housing part has a recess in which a housing wall element which closes the recess rests as a display element.
  • a display element which forms an integral part of the housing part, in particular its lid region, not recognizable as a display element with proper attachment, since it is flat / arranged flat to the housing part surface. Only when it is no longer connected to the ground via the bridge and its head is it facing this surface and perceived as an indicator.
  • the engagement portion comprises a part about the axis of rotation of the housing parts arcuate curved guide slot, in which the head during rotation in attaching the housing parts einement and having at least at its end a cooperating with the head separator.
  • the display element and thus its web, and its head is radially spaced from the axis of rotation, so that the head of the web, preferably immediately above the bottom of the upper housing part performs a movement on a partial circular path, because the housing parts rotating together be attached.
  • the guide slot is arranged so that initially when placing the lower on the upper housing part of the head of the web in front of the guide slot or its inlet opening is arranged and retracts with the beginning of the rotational movement for fastening in the guide slot, preferably thereby is encompassed by the guide slot, in particular at least so that the guide slot partially covers the side facing the lower housing part head.
  • the head has a larger cross-section, in particular width, than a slot pointing to the lower housing part in the guide slot through which the web extends.
  • the web can generally have a thinning of material, in particular immediately adjacent to the head, which simplifies the separation of the head from the web end.
  • the slot width in the guide slot is adapted to the reduced cross section of this material dilution.
  • the guide slot has at least one facing the bottom outer surface / ceiling sliding surface on which the head slides with a pointing to the lower housing head face during rotation during mounting along, wherein the distance of the sliding surface to the lower housing part with progressing Angle of rotation increases.
  • the head is moved in a rotating attachment in the direction of the floor or the ceiling, whereby the display element is moved in the same direction by the same distance, in particular a protruding over the housing part surface display element is pulled flush in the housing part or with the housing part surface ,
  • a detent element can be arranged at the end of the guide slot, with which the head locks, in particular when it is brought over this on its trajectory.
  • the head is fixed after locking or fixed in a local area.
  • the head remains fixed in place in the engagement area at the bottom and separates from the web, e.g. by tearing or shearing, whereby the display element emerges.
  • a knife may be arranged, wherein the radial distance of the knife edge to the axis of rotation increases with advancing angle of rotation during mounting.
  • the cutting edge of the knife end at the end of the guide slot thus has a greater distance from the axis of rotation than at the beginning of the knife.
  • the web, or a connection region between the web and head is guided on its orbit about the axis of rotation against the cutting edge in a reverse rotation of the lower housing part, which cuts off the head, or, for example, at previous locking the broken but still hanging head separates from the web.
  • the cutting edge is preferably arranged so that the radial distance of the cutting edge is smaller at the beginning and is greater at the knife end than the radial distance of the head or the connecting region between the head and web to the axis of rotation.
  • the knife is fastened to the bottom at the beginning of the guide slot and has a free movable end, in particular the distance between the knife surface facing away from the bottom to the lower housing part decreases with advancing angle of rotation. Compared to the ground thus the knife is rising.
  • the knife in particular at least its free end, is displaceable / displaced from the side of the head facing the bottom during a rotation during fastening in the direction of the ground.
  • the head thus slides over the blade surface during a fastening rotation and presses the blade towards the ground.
  • At the end of the rotational movement of the lower housing part of the head is in the direction of rotation behind the knife end, so that the pressed back to the ground knife back, especially so that at the end of the rotation for fixing the knife edge is arranged at the free end of the knife on that surface of the head , which faces the lower housing part. This is the head between knife edge and bottom and can be separated when turning back.
  • the display element and the web are detachably connected to each other. This opens up the possibility of the display element of a web, from which the head has been separated, to solve and so the old display element with a new bridge to reconnect with head. The reuse of the old display element avoids color variations that could otherwise result between a new display element and the old remaining housing.
  • FIG. 1 shows first in an overall view of a possible embodiment of a smoke detector according to the invention.
  • a lower housing part 1 which is circular in cross-section here, and an upper housing part 2 fastened or fastened to the ceiling, not shown, can be seen. Both housing parts are fastened to one another by rotation about an axis of rotation 3, eg by thread, bayonet, etc.
  • Smoke inlet openings 3 are shown here on the upper housing part 2, but may also be arranged at the bottom.
  • a recess 4 In the housing surface of the lower housing part 1 is a recess 4, which is flush with a matched to the recess in the form of display element 5.
  • FIG. 2 alone shows the display element 5 without the lower housing part 1 in its interaction with the bottom 2a of the upper housing part 2 not shown here in the rest.
  • FIG. 3 shows the display element 5 alone, also without bottom 2a. FIG. 2 and 3 will be further described together below.
  • the head 7 at the lower end of the web 8 describes a part-circular path of movement.
  • the head 7 is inserted into a guide slot 10 and moves therein from its beginning to its end 10a.
  • the guide slot is formed by two rising from the ground parallel curved walls, each wall having a facing the opposite wall collar. The distance between the collar is smaller than between the walls, whereby a slot 11 is formed through which a connecting portion between the head 7 and web 8 is guided.
  • the connecting portion 8a is made smaller in cross section than the web 8 and the head 7 and thus represents the weakest link in the connection of head 7 to web 8. At this connecting portion 8a, the head 7 can be separated from the web.
  • the over the walls of the guide slot 10 facing each opposite wall collar have a bottom facing sliding surface on which the lower housing part 1 facing head surface 7a slides along.
  • This sliding surface extends in a preferred embodiment not only parallel to the bottom 2a, but the distance of this sliding surface to the lower housing part 1 increases from the beginning 10 of the guide slot to the end 10a. That then the head 7 is guided in its movement in the guide slot 10 on the way to the end 10 a in the direction of the ground.
  • the hanging over the web 8 on the head display element 5 is guided in the same direction and pulled so flush to the surface of the housing part 1.
  • the guide slot 10 in particular between the walls is a knife 9, one end 9a on the bottom 2a, in particular the ceiling side, is fixed and the other end 9b is free to move, in particular in its distance relative to the bottom 2a.
  • the radial distance of the cutting edge 9 c of the knife 9 increases from the beginning of the guide slot 10 to the end 10 a with respect to the Fulcrum 6, in particular so that the cutting edge 9c at the free end 9b has a greater radial distance than the connecting portion 8a between the web 8 and head 7th
  • the head 7 lies between the knife 9 and the bottom 2, so that the connecting area 8a on the way into the guide slot on the knife edge 9c introduced and cut.
  • the web 8 and the display element 5 is free from the head 7 and emerges from the surface of the lower housing part 1 and indicates an O réellesmanipulation on the smoke detector.
  • the web 8 which is also possible here as well as in all other possible embodiments, it can be made of e.g. have a wavy shape in the direction of its longitudinal extent.
  • the web 8 is slightly resiliently extensible in the longitudinal direction, so that the display element 5 is held with a spring force in the housing surface and shoots out of the surface during the separation of the head by the sudden release of the holding force.

Abstract

The alarm has upper and lower housing parts connected with one another by a rotary joint. A smoke detection device is arranged between the parts. The lower part has a display element (5) that is moved out of a housing part upper surface, where the element has a rod (8) that extends till to a base (2a) of the upper part. An end of the rod has a head that is separated from the rod, and a guiding crank (10) is arranged at the base. The head is engaged with the guiding crank through rotation of the lower part opposite to the upper part and separated from the rod during the rotation.

Description

Die Erfindung betrifft einen Rauchmelder umfassend ein oberes, insbesondere raumdeckenseitiges Gehäuseteil und ein unteres, insbesondere raumseitiges Gehäuseteil, die aneinander mittels einer formschlüssigen, lösbaren Drehverbindung verbindbar sind, wobei zwischen den Gehäuseteilen eine Vorrichtung zur Rauchdetektion angeordnet ist.The invention relates to a smoke detector comprising an upper, in particular raumdeckenseitiges housing part and a lower, in particular room-side housing part, which are connectable to each other by means of a positive, releasable rotary connection, wherein a device for detecting smoke is arranged between the housing parts.

Rauchmelder dieser Art sind im Stand der Technik bekannt, um Räume, beispielsweise Wohnräume hinsichtlich des Auftretens von Rauch, wie er bei Bränden entsteht, zu überwachen und ggfs. einen Alarm abzugeben. Eine zwischen den Gehäuseteilen angeordnete Vorrichtung zur Rauchdetektion umfasst dabei üblicherweise eine optische Detektionsstrecke mit einem Licht emittierenden Element und mit einem Streulicht detektierenden Sensor, der Streulicht detektiert, wenn das emittierte Licht an Rauchpartikeln in der Luft gestreut wurde.Smoke detectors of this type are known in the art to monitor rooms, such as living spaces, for the presence of smoke, such as those created by fires, and, if necessary, issue an alarm. A device arranged between the housing parts for smoke detection usually comprises an optical detection path with a light-emitting element and a scattered light detecting sensor that detects stray light when the emitted light was scattered on smoke particles in the air.

Teilweise sind oder werden Rauchmelder zur Pflicht, wobei z.B. einen Vermieter die Nachweispflicht trifft, den ordnungsgemäßen Gebrauch und Einsatz eines Rauchmelders nachzuweisen. Dabei ist es bekannt, dass oftmals Rauchmelder, wenn auch ggfs. nur zeitweise, demontiert werden, z.B. für Renovierungszwecke und anschließend wieder montiert werden, wobei dies nicht von Fachpersonal erfolgt und die Funktion der Rauchmelder ungewiss ist. An einem solchen erneut montierten Rauchmelder kann jedoch die zwischenzeitig erfolge Manipulation nicht erkannt werden.In some cases, smoke detectors are or become mandatory, whereby, for example, a landlord is required to prove that he has used a smoke detector properly. It is known that often smoke detectors, even if only temporarily, are dismantled, for example, for renovation purposes and then reinstalled, which is not done by professionals and the function of the smoke detector is uncertain. At such a refitted smoke detector, however, the interim successive manipulation can not be detected.

Es ist daher die Aufgabe der Erfindung, einen Rauchmelder bereit zu stellen, mittels dem auf einfache Art überprüft werden kann, ob dieser nach einer ursprünglichen fachgerechten Montage nochmals demontiert wurde.It is therefore an object of the invention to provide a smoke detector, by means of which can be checked in a simple way, whether this was dismantled after an original professional assembly again.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das untere Gehäuseteil ein aus der Gehäuseteiloberfläche heraus bewegbares Anzeigeelement aufweist, welches einen sich zum Boden des oberen Gehäuseteils erstreckenden Steg aufweist, dessen zum Boden weisendes Ende einen vom Steg trennbaren Kopf aufweist und am Boden ein Eingriffsbereich angeordnet ist, mit dem der Kopf durch Drehung des unteren gegenüber dem oberen Gehäuseteil beim Befestigen in Eingriff bringbar ist und bei einer Drehung beim Lösen vom Steg abtrennbar ist.This object is achieved in that the lower housing part has a housing part from the surface movable display element having a extending to the bottom of the upper housing portion web, the ground-facing end has a separable from the web head and the bottom is arranged an engagement region with which the head is engageable by rotation of the lower relative to the upper housing part during fastening and is detachable from the web upon rotation upon release.

Die hier gemachten Richtungsangaben, insbesondere betreffend oberes und unteres Gehäuseteil charakterisieren die normale Montagepositionierung, wenn ein Rauchmelder an der Decke eines Raumes befestigt ist.The directions given here, especially regarding the upper and lower housing part characterize the normal mounting position when a smoke detector is attached to the ceiling of a room.

Der wesentliche Kerngedanke der Erfindung ist es, eine Anzeige am Rauchmelder vorzusehen, an der man deutlich erkennen kann, dass ein Rauchmelder nach einer ursprünglichen Montage nochmals demontiert wurde. Dafür ist hier die Konstruktion so gewählt, dass sich ein Anzeigeelement, welches am unteren Gehäuseteil vorgesehen ist und welches man somit leicht vom Raum beim Blick zur Decke erkennen kann mittels des Steges mit dem an der Raumdecke montierten Boden des oberen Gehäuseteils zunächst bei der erstmaligen Montage verbindet. Die Verbindung erfolgt dabei zwischen dem Kopf am bodennahen Ende des Steges und einem Eingriffsbereich, der am oder im Boden angeordnet ist.The essential core idea of the invention is to provide an indication on the smoke detector, from which it can be clearly seen that a smoke detector has been dismantled after an original assembly. For this, the construction is chosen so that a display element, which is provided on the lower housing part and which can thus be easily seen from the room when looking to the ceiling by means of the web with the bottom of the upper housing part mounted on the ceiling first during initial installation combines. The connection takes place between the head at the bottom end of the web and an engagement region which is arranged on or in the ground.

Dabei ist es hier vorgesehen, dass es zu dem Eingriff zwischen Kopf und Eingriffsbereich und somit zur Verbindung von Anzeigeelement und Boden kommt, wenn das unteren Gehäuseteil am oberen Gehäuseteil durch eine Drehung montiert wird, wobei das untere Gehäuseteil um eine Drehachse relativ zum ortsfest an der Decke montierten oberen Gehäuseteil gedreht wird und so die formschlüssige Verbindung zwischen den Gehäuseteilen erzielt wird.It is here provided that it comes to the engagement between the head and engagement area and thus the connection of the display element and the bottom, when the lower housing part is mounted on the upper housing part by a rotation, wherein the lower housing part about an axis of rotation relative to the fixed to the Ceiling-mounted upper housing part is rotated and so the positive connection between the housing parts is achieved.

Die Drehverbindung kann z.B. über ein zwischen den Gehäuseteilen realisiertes Gewinde, eine Renkverbindung, insbesondere Bajonett-Verbindung oder eine sonstige Verbindung erfolgen, die bei Drehung der Gehäuseteile relativ zueinander zum Formschluß zwischen diesen führt. Dabei kann es vorgesehen sein, dass der Formschluß und somit die Verbindung der Gehäuseteile aneinander bereits bei einem Drehwinkel kleiner 180 Grad bevorzugt kleiner 90 Grad, noch weiter bevorzugt zwischen 40 und 60 Grad erfolgt.The rotary joint may e.g. via a realized between the housing parts thread, a Renkverbindung, in particular bayonet connection or other connection, which leads relative to each other upon rotation of the housing parts for positive engagement between them. It may be provided that the positive engagement and thus the connection of the housing parts to each other already at a rotational angle of less than 180 degrees, preferably less than 90 degrees, even more preferably between 40 and 60 degrees.

Wesentlich ist weiterhin, dass sich die einmal erzeugte Verbindung zwischen Anzeigeelement, bzw. Kopf von dessen Steg und dem Eingriffsbereich am Boden nicht mehr zerstörungsfrei lösen lässt, sondern dass vielmehr bei einem Trennen der Gehäuseteile durch eine Rückdrehung sich der Kopf vom Steg löst, bzw. abgetrennt wird. Dadurch lässt sich zwar grundsätzlich das untere Gehäuseteil später wieder am oberen befestigen, das Anzeigeelement lässt sich jedoch mangels des verloren gegangenen Kopfes nicht mehr mit dem Boden verbinden.It is also essential that the once generated connection between the display element, or head of the web and the engagement area on the ground can not be solved without destroying, but rather that in a separation of the housing parts by a reverse rotation of the head solves the bridge, or is separated. As a result, although in principle the lower housing part can later be fastened to the upper again, the display element can no longer be connected to the floor because of the lost head.

Das Anzeigeelement, welches aus der Gehäuseteiloberfläche des unteren Gehäuseteils heraus bewegbar ist wird demnach mangels einer Befestigung am Boden des oberen Gehäuseteils entweder bereits durch die wirkende Schwerkraft oder in einer anderen Ausführung aufgrund eine Kraftbelastung in die Richtung nach außen aus der Gehäuseteiloberfläche herausbewegt und steht somit gegenüber dieser hervor, insbesondere von der Decke aus in den Raum hinein, so dass es leicht erkennbar ist und eine zwischenzeitige Demontage anzeigt. Ein solcher Rauchmelder zeigt somit seine Manipulation an und kann überprüft werden.The display element, which is movable out of the housing part surface of the lower housing part is therefore moved out of the housing part surface for lack of attachment to the bottom of the upper housing either already by the acting gravity or in another embodiment due to a force load in the outward direction from the housing part surface and thus faces this out, especially from the ceiling into the room, so that it is easily recognizable and indicates an intermediate disassembly. Such a smoke detector thus indicates its manipulation and can be checked.

Die genannte Kraftbelastung kann z.B. durch ein Federelement erzeugt sein. Ein solches Federelement kann durch eine separate Feder, z.B. Druckfeder realisiert sein. Es kann bei jeglicher Art der Herausbewegung vorgesehen sein, dass dies unverlierbar erfolgt, d.h. das Anzeigeelement ist zwar aus der Oberfläche herausbewegt, fällt jedoch nicht komplett aus dem unteren Gehäuseteil heraus.The said force load can be generated for example by a spring element. Such a spring element can be realized by a separate spring, for example compression spring. It can be provided for any kind of outward movement that this is done captive, ie the display element is indeed moved out of the surface, but does not fall completely out of the lower housing part.

In einer bevorzugten Ausführung kann es vorgesehen sein, dass ein dem Boden des oberen Gehäuseteils gegenüberliegender Bereich des unteren Gehäuseteils eine Ausnehmung aufweist, in der als Anzeigeelement ein die Ausnehmung verschließendes Gehäusewandelement einliegt. So ist ein solches Anzeigeelement, welches integralen Bestandteil des Gehäuseteils, insbesondere dessen Deckelbereich bildet, bei ordnungsgemäßer Befestigung nicht als Anzeigeelement erkennbar, da es eben / plan zur Gehäuseteiloberfläche angeordnet ist. Erst wenn es nicht mehr über den Steg und dessen Kopf mit dem Boden verbunden ist steht es gegenüber dieser Oberfläche vor und wird als Anzeige wahrgenommen.In a preferred embodiment, it can be provided that a region of the lower housing part lying opposite the bottom of the upper housing part has a recess in which a housing wall element which closes the recess rests as a display element. Thus, such a display element, which forms an integral part of the housing part, in particular its lid region, not recognizable as a display element with proper attachment, since it is flat / arranged flat to the housing part surface. Only when it is no longer connected to the ground via the bridge and its head is it facing this surface and perceived as an indicator.

Um eine Verbindung von Kopf des Stegs und Boden bei der drehenden Bewegung des unteren Gehäuseteils zu bewirken, kann es bevorzugt vorgesehen sein, dass der Eingriffsbereich eine um die Drehachse der Gehäuseteile teilkreisbogenförmig gekrümmte Führungskulisse umfasst, in die der Kopf bei einer Drehung beim Befestigen der Gehäuseteile einfährt und die zumindest an ihrem Ende eine mit dem Kopf zusammenwirkende Trennvorrichtung aufweist.In order to effect a connection of head of the web and bottom in the rotating movement of the lower housing part, it may preferably be provided that the engagement portion comprises a part about the axis of rotation of the housing parts arcuate curved guide slot, in which the head during rotation in attaching the housing parts einfährt and having at least at its end a cooperating with the head separator.

Hierfür ist es vorgesehen, dass das Anzeigeelement und somit dessen Steg, sowie dessen Kopf radial beabstandet zur Drehachse angeordnet ist, so dass der Kopf des Steges, bevorzugt unmittelbar über dem Boden des oberen Gehäuseteils eine Bewegung auf einer Teilkreisbahn vollzieht, denn die Gehäuseteile drehend aneinander befestigt werden. Die Führungskulisse ist dabei so angeordnet, dass zunächst beim Aufsetzen des unteren auf das obere Gehäuseteil der Kopf des Steges vor der Führungskulisse bzw. deren Eintrittsöffnung angeordnet ist und mit Beginn der Drehbewegung zum Befestigen in die Führungskulisse einfährt, bevorzugt dabei von der Führungskulisse umfasst wird, insbesondere zumindest so, dass die Führungskulisse bereichsweise die zum unteren Gehäuseteil weisende Kopfseite überdeckt.For this purpose, it is provided that the display element and thus its web, and its head is radially spaced from the axis of rotation, so that the head of the web, preferably immediately above the bottom of the upper housing part performs a movement on a partial circular path, because the housing parts rotating together be attached. The guide slot is arranged so that initially when placing the lower on the upper housing part of the head of the web in front of the guide slot or its inlet opening is arranged and retracts with the beginning of the rotational movement for fastening in the guide slot, preferably thereby is encompassed by the guide slot, in particular at least so that the guide slot partially covers the side facing the lower housing part head.

Bevorzugt weist der Kopf einen größeren Querschnitt, insbesondere Breite auf, als ein zum unteren Gehäuseteil weisender Schlitz in der Führungskulisse durch den der Steg hindurchreicht.Preferably, the head has a larger cross-section, in particular width, than a slot pointing to the lower housing part in the guide slot through which the web extends.

Der Steg kann allgemein eine Materialverdünnung, insbesondere unmittelbar angrenzend an den Kopf aufweisen, was die Trennung des Kopfes vom StegEnde vereinfacht. Hier kann es mit Bezug auf die zuvor beschriebene Ausführung vorgesehen sein, dass die Schlitzbreite in der Führungskulisse an den verringerten Querschnitt dieser Materialverdünnung angepasst ist.The web can generally have a thinning of material, in particular immediately adjacent to the head, which simplifies the separation of the head from the web end. Here it can be provided, with reference to the previously described embodiment, that the slot width in the guide slot is adapted to the reduced cross section of this material dilution.

In bevorzugter Weiterbildung kann es vorgesehen sein, dass die Führungskulisse wenigstens eine zur Bodenaußenfläche / Raumdecke weisende Gleitfläche aufweist, an welcher der Kopf mit einer zum unteren Gehäuseteil weisenden Kopffläche bei einer Drehung beim Befestigen entlang gleitet, wobei der Abstand der Gleitfläche zum unteren Gehäuseteil mit fortschreitendem Drehwinkel zunimmt. Hierdurch wird der Kopf bei einer drehenden Befestigung in die Richtung zum Boden bzw. zur Raumdecke bewegt, wodurch das Anzeigeelement in gleicher Richtung um die gleiche Wegstrecke bewegt wird, insbesondere wobei ein über die Gehäuseteiloberfläche hervorstehendes Anzeigeelement in das Gehäuseteil oder mit der Gehäuseteiloberfläche bündig gezogen wird.In a preferred embodiment, it may be provided that the guide slot has at least one facing the bottom outer surface / ceiling sliding surface on which the head slides with a pointing to the lower housing head face during rotation during mounting along, wherein the distance of the sliding surface to the lower housing part with progressing Angle of rotation increases. As a result, the head is moved in a rotating attachment in the direction of the floor or the ceiling, whereby the display element is moved in the same direction by the same distance, in particular a protruding over the housing part surface display element is pulled flush in the housing part or with the housing part surface ,

Weiterhin kann in einer möglichen Ausführung am Ende der Führungskulisse ein Rastelement angeordnet sein, mit dem der Kopf verrastet, insbesondere wenn er über dieses auf seiner Bewegungsbahn herübergeführt ist. Dadurch ist der Kopf nach Verrastung ortsfest oder in einem örtlichen Bereich festgelegt. Bei einem Rückdrehen des unteren Gehäuseteils zum Zweck der Entfernung bleibt demnach der Kopf ortsfest im Eingriffsbereich am Boden verrastet und trennt sich vom Steg, z.B. durch Abriss oder Abscheren, wodurch das Anzeigeelement hervortritt.Furthermore, in one possible embodiment, a detent element can be arranged at the end of the guide slot, with which the head locks, in particular when it is brought over this on its trajectory. As a result, the head is fixed after locking or fixed in a local area. Thus, when the lower housing part is turned back for the purpose of removal, the head remains fixed in place in the engagement area at the bottom and separates from the web, e.g. by tearing or shearing, whereby the display element emerges.

In einer Weiterbildung der zuvor beschriebenen Verrastung oder auch alternativ zu dieser kann dem Verlauf der Führungskulisse folgend in der Führungskulisse ein Messer angeordnet sein, bei welchem der radiale Abstand der Messerschneide zur Drehachse mit fortschreitendem Drehwinkel beim Befestigen zunimmt. Die Schneide des Messerendes am Ende der Führungskulisse hat somit zur Drehachse einen größeren Abstand als am Messeranfang. Dies bedeutet, dass der Steg, bzw. ein Verbindungsbereich zwischen Steg und Kopf bei einem Rückdrehen des unteren Gehäuseteil auf seiner Kreisbahn um die Drehachse gegen die Schneide geführt wird, welche den Kopf abschneidet, bzw. z.B. bei vorherigen Verrastung den angebrochenen aber noch hängenden Kopf vom Steg trennt. Hierfür ist die Schneide bevorzugt so angeordnet, dass der radiale Abstand der Schneide am Anfang kleiner ist und am Messerende größer ist als der radiale Abstand des Kopfes bzw. des Verbindungsbereiches zwischen Kopf und Steg zur Drehachse.In a further development of the latching described above or alternatively to this, the course of the guide slot following in the guide slot a knife may be arranged, wherein the radial distance of the knife edge to the axis of rotation increases with advancing angle of rotation during mounting. The cutting edge of the knife end at the end of the guide slot thus has a greater distance from the axis of rotation than at the beginning of the knife. This means that the web, or a connection region between the web and head is guided on its orbit about the axis of rotation against the cutting edge in a reverse rotation of the lower housing part, which cuts off the head, or, for example, at previous locking the broken but still hanging head separates from the web. For this purpose, the cutting edge is preferably arranged so that the radial distance of the cutting edge is smaller at the beginning and is greater at the knife end than the radial distance of the head or the connecting region between the head and web to the axis of rotation.

Um zu erreichen, dass der Kopf erst bei einer Zurückbewegung mit der Messerscheide in Kontakt kommt kann es weiterhin vorgesehen sein, dass das Messer am Anfang der Führungskulisse am Boden befestigt ist und ein freies bewegliches Ende aufweist, insbesondere wobei der Abstand der vom Boden wegweisenden Messeroberfläche zum unteren Gehäuseteil mit fortscheitendem Drehwinkel abnimmt. Gegenüber dem Boden ist somit das Messer ansteigend angeordnet.In order to achieve that the head only comes into contact with the knife sheath during a return movement, it can furthermore be provided that the knife is fastened to the bottom at the beginning of the guide slot and has a free movable end, in particular the distance between the knife surface facing away from the bottom to the lower housing part decreases with advancing angle of rotation. Compared to the ground thus the knife is rising.

Es kann dann vorgesehen sein, dass das Messer, insbesondere zumindest dessen freies Ende, von der dem Boden zuweisenden Seite des Kopfes bei einer Drehung beim Befestigen in Richtung zum Boden verlagerbar / verlagert ist. Der Kopf gleitet somit bei einer Befestigungsdrehung über die Messeroberfläche und drück das Messer in Richtung zum Boden. Am Ende der Drehbewegung des unteren Gehäuseteils liegt der Kopf in Drehrichtung hinter dem Messerende, so dass das zum Boden gedrückte Messer wieder zurückweicht, insbesondere so, dass am Ende der Drehung zum Befestigen die Messerschneide am freien Ende des Messers über derjenigen Fläche des Kopfes angeordnet ist, die zum unteren Gehäuseteil weist. Damit liegt der Kopf zwischen Messerschneide und Boden und kann beim Zurückdrehen abgetrennt werden.It may then be provided that the knife, in particular at least its free end, is displaceable / displaced from the side of the head facing the bottom during a rotation during fastening in the direction of the ground. The head thus slides over the blade surface during a fastening rotation and presses the blade towards the ground. At the end of the rotational movement of the lower housing part of the head is in the direction of rotation behind the knife end, so that the pressed back to the ground knife back, especially so that at the end of the rotation for fixing the knife edge is arranged at the free end of the knife on that surface of the head , which faces the lower housing part. This is the head between knife edge and bottom and can be separated when turning back.

In einer weiteren bevorzugten Ausführung kann es vorgesehen sein, dass das Anzeigeelement und der Steg miteinander lösbar verbunden sind. Dies eröffnet die Möglichkeit, das Anzeigelement von einem Steg, von welchem der Kopf abgetrennt wurde, zu lösen und so das alte Anzeigeelement mit einem neuen Steg mit Kopf wieder zu verbinden. Durch die Wiederverwendung des alten Anzeigeelementes werden Farbabweichungen vermieden, die sich ansonsten zwischen einem neuen Anzeigeelement und dem alten übrigen Gehäuse ergeben könnten.In a further preferred embodiment, it can be provided that the display element and the web are detachably connected to each other. This opens up the possibility of the display element of a web, from which the head has been separated, to solve and so the old display element with a new bridge to reconnect with head. The reuse of the old display element avoids color variations that could otherwise result between a new display element and the old remaining housing.

Ein Ausführungsbeispiel der Erfindung ist den nachfolgenden Figuren gezeigt. Es zeigen:

Fig. 1:
Einen Rauchmelder ohne Darstellung der Raumdecke
Fig. 2:
das Anzeigeelement mit Steg, dessen Kopf in einer Führungskulisse am Boden eingreift
Figur 3:
das Anzeigeelement mit Steg, dessen Kopf und dem Messer in separater Darstellung
An embodiment of the invention is shown in the following figures. Show it:
Fig. 1:
A smoke detector without showing the ceiling
Fig. 2:
the display element with web whose head engages in a guide slot on the ground
FIG. 3:
the display element with web, its head and the knife in a separate representation

Die Figur 1 zeigt zunächst in einer Gesamtdarstellung eine mögliche erfindungsgemäße Ausführung eines Rauchmelders. Erkennbar ist ein unteres Gehäuseteil 1, welches hier im Querschnitt kreisförmig ist und ein oberes an der nicht gezeigten Raumdecke befestigtes bzw. befestigbares Gehäuseteil 2. Beide Gehäuseteile werden durch Drehung um eine Drehachse 3 aneinander befestigt, z.B. durch Gewinde, Bajonett etc.The FIG. 1 shows first in an overall view of a possible embodiment of a smoke detector according to the invention. A lower housing part 1, which is circular in cross-section here, and an upper housing part 2 fastened or fastened to the ceiling, not shown, can be seen. Both housing parts are fastened to one another by rotation about an axis of rotation 3, eg by thread, bayonet, etc.

Zwischen den Gehäuseteilen 1 und 2 befindet sich eine hier nicht näher beschriebene Vorrichtung zur Rauchdetektion. Raucheintrittsöffnungen 3 sind hier am oberen Gehäuseteil 2 gezeigt, können aber auch am unteren angeordnet sein.Between the housing parts 1 and 2 there is a device not described in detail for detecting smoke. Smoke inlet openings 3 are shown here on the upper housing part 2, but may also be arranged at the bottom.

In der Gehäuseoberfläche des unteren Gehäuseteils 1 befindet sich eine Ausnehmung 4, die mit einem an die Ausnehmung in der Form angepassten Anzeigeelement 5 bündig verschlossen ist.In the housing surface of the lower housing part 1 is a recess 4, which is flush with a matched to the recess in the form of display element 5.

Die Figur 2 zeigt alleine das Anzeigeelement 5 ohne unteres Gehäuseteil 1 in seiner Zusammenwirkung mit dem Boden 2a des hier im übrigen nicht weiter gezeigten oberen Gehäuseteils 2. Figur 3 zeigt das Anzeigeelement 5 alleine, ebenfalls ohne Boden 2a. Figur 2 und 3 werden im Folgenden gemeinsam weiter beschrieben.The FIG. 2 alone shows the display element 5 without the lower housing part 1 in its interaction with the bottom 2a of the upper housing part 2 not shown here in the rest. FIG. 3 shows the display element 5 alone, also without bottom 2a. FIG. 2 and 3 will be further described together below.

Bei der Drehung des unteren Gehäuseteils 1 um die Drehachse 3 beschreibt der Kopf 7 am unteren Ende des Steges 8 eine teilkreisförmige Bewegungsbahn. Auf dieser Bahn wird der Kopf 7 in eine Führungskulisse 10 eingeführt und bewegt sich darin von deren Anfang bis zu deren Ende 10a. Die Führungskulisse ist ausgebildet durch zwei vom Boden aufstehende parallel gekrümmt verlaufende Wände, wobei jede Wand einen zur gegenüberliegenden Wand weisenden Kragen aufweist. Der Abstand zwischen den Kragen ist kleiner als zwischen den Wänden, wodurch ein Schlitz 11 ausgebildet ist, durch den ein Verbindungsbereich zwischen Kopf 7 und Steg 8 geführt ist. Der Verbindungsbereich 8a ist im Querschnitt kleiner ausgeführt als der Steg 8 bzw. der Kopf 7 und stellt somit das schwächste Glied in der Verbindung von Kopf 7 zu Steg 8 dar. An diesem Verbindungsbereich 8a kann der Kopf 7 vom Steg getrennt werden.During the rotation of the lower housing part 1 about the axis of rotation 3, the head 7 at the lower end of the web 8 describes a part-circular path of movement. On this track, the head 7 is inserted into a guide slot 10 and moves therein from its beginning to its end 10a. The guide slot is formed by two rising from the ground parallel curved walls, each wall having a facing the opposite wall collar. The distance between the collar is smaller than between the walls, whereby a slot 11 is formed through which a connecting portion between the head 7 and web 8 is guided. The connecting portion 8a is made smaller in cross section than the web 8 and the head 7 and thus represents the weakest link in the connection of head 7 to web 8. At this connecting portion 8a, the head 7 can be separated from the web.

Die über die Wände der Führungskulisse 10 zur jeweils gegenüberliegenden Wand weisenden Kragen haben eine zum Boden weisende Gleitfläche, an welcher die zum unteren Gehäuseteil 1 weisende Kopffläche 7a entlang gleitet. Diese Gleitfläche verläuft in bevorzugter Ausführung nicht lediglich parallel zum Boden 2a, sondern der Abstand dieser Gleitfläche zum unteren Gehäuseteil 1 nimmt vom Anfang 10 der Führungskulisse bis zu deren Ende 10a zu. D.h. das dann der Kopf 7 bei seiner Bewegung in der Führungskulisse 10 auf dem Weg bis zu deren Ende 10a in die Richtung zum Boden geführt wird. Das über den Steg 8 am Kopf hängende Anzeigeelement 5 wird in gleiche Richtung geführt und so bündig zur Oberfläche des Gehäuseteils 1 gezogen.The over the walls of the guide slot 10 facing each opposite wall collar have a bottom facing sliding surface on which the lower housing part 1 facing head surface 7a slides along. This sliding surface extends in a preferred embodiment not only parallel to the bottom 2a, but the distance of this sliding surface to the lower housing part 1 increases from the beginning 10 of the guide slot to the end 10a. That then the head 7 is guided in its movement in the guide slot 10 on the way to the end 10 a in the direction of the ground. The hanging over the web 8 on the head display element 5 is guided in the same direction and pulled so flush to the surface of the housing part 1.

In der Führungskulisse 10, insbesondere zwischen deren Wänden liegt ein Messer 9, dessen eines Ende 9a am Boden 2a, insbesondere dessen Deckenseite, fest ist und dessen anderes Ende 9b frei beweglich ist, insbesondere in seinem Abstand relativ zum Boden 2a. Der radiale Abstand der Schneide 9c des Messers 9 nimmt von dem Anfang der Führungskulisse 10 bis zu deren Ende 10a bezogen auf den Drehpunkt 6 zu, insbesondere so, dass die Schneide 9c am freien Ende 9b einen größeren radialen Abstand hat als der Verbindungsbereich 8a zwischen Steg 8 und Kopf 7.In the guide slot 10, in particular between the walls is a knife 9, one end 9a on the bottom 2a, in particular the ceiling side, is fixed and the other end 9b is free to move, in particular in its distance relative to the bottom 2a. The radial distance of the cutting edge 9 c of the knife 9 increases from the beginning of the guide slot 10 to the end 10 a with respect to the Fulcrum 6, in particular so that the cutting edge 9c at the free end 9b has a greater radial distance than the connecting portion 8a between the web 8 and head 7th

Bei seiner Bewegung in der Führungskulisse 10 bis zu deren Ende 10a drückt zunächst der Kopf 7 mit seiner zum Boden weisenden Seite 7b das Messer 9 in Richtung zum Boden 2a. Wenn der Kopf 7 am Ende 10a der Führungskulisse 10 über das Messer 9 hinaus gelangt, schwingt das zuvor zum Boden gedrückte Messer 9 zurück, bevorzugt bis über eine in Rückdrehrichtung vordere Anlaufschräge 7c am Kopf 7, wie es besonders gut Figur 3 zeigt.During its movement in the guide slot 10 to its end 10a first pushes the head 7 with its facing the ground side 7b the knife 9 toward the bottom 2a. When the head 7 reaches beyond the blade 9 at the end 10a of the guide slot 10, the blade 9 previously pressed to the bottom swings back, preferably until it reaches the head 7 via a starting bevel 7c in the reverse direction, as is particularly well FIG. 3 shows.

Wird bei einer Drehung des unteren Gehäuseteil 1 nun der Kopf in der Führungskulisse 10 von deren Ende 10a zu deren Anfang bewegt, so liegt dabei der Kopf 7 zwischen Messer 9 und Boden 2 so dass der Verbindungsbereich 8a auf dem Weg in der Führungskulisse an die Messerschneide 9c herangeführt und durchtrennt wird.If, during a rotation of the lower housing part 1, the head now moves in the guide slot 10 from its end 10a to its beginning, then the head 7 lies between the knife 9 and the bottom 2, so that the connecting area 8a on the way into the guide slot on the knife edge 9c introduced and cut.

Damit ist der Steg 8 und das Anzeigeelement 5 vom Kopf 7 frei und tritt aus der Oberfläche des unteren Gehäuseteils 1 heraus und zeigt eine Offnungsmanipulation am Rauchmelder an.Thus, the web 8 and the display element 5 is free from the head 7 and emerges from the surface of the lower housing part 1 and indicates an Offnungsmanipulation on the smoke detector.

In der hier gezeigten und auch bei allen anderen möglichen Ausführungsformen ebenso möglichen Ausgestaltung des Steges 8 kann dieser z.B. in der Richtung seiner Längserstreckung eine wellige Form aufweisen. Hierdurch ist der Steg 8 in Längsrichtung leicht federnd dehnbar, so dass das Anzeigeelement 5 mit einer Feder-Kraft in der Gehäusefläche gehalten ist und beim Abtrennen des Kopfes durch das plötzliche Nachlassen der Haltekraft aus der Oberfläche herausschießt.In the embodiment of the web 8 which is also possible here as well as in all other possible embodiments, it can be made of e.g. have a wavy shape in the direction of its longitudinal extent. As a result, the web 8 is slightly resiliently extensible in the longitudinal direction, so that the display element 5 is held with a spring force in the housing surface and shoots out of the surface during the separation of the head by the sudden release of the holding force.

Claims (11)

Rauchmelder umfassend ein oberes, insbesondere raumdeckenseitiges Gehäuseteil (2) und ein unteres, insbesondere raumseitiges Gehäuseteil (1), die aneinander mittels einer formschlüssigen, lösbaren Drehverbindung verbindbar sind, wobei zwischen den Gehäuseteilen (1,2) eine Vorrichtung zur Rauchdetektion angeordnet ist, dadurch gekennzeichnet, dass das untere Gehäuseteil (1) ein aus der Gehäuseteiloberfläche heraus bewegbares Anzeigeelement (5) aufweist, welches einen sich zum Boden des oberen Gehäuseteils (2) erstreckenden Steg (8) aufweist, dessen zum Boden weisendes Ende einen vom Steg (8) trennbaren Kopf (7) aufweist und am Boden (2a) ein Eingriffsbereich (10) angeordnet ist, mit dem der Kopf (7) durch Drehung des unteren (1) gegenüber dem oberen Gehäuseteil (2) beim Befestigen in Eingriff bringbar ist und bei einer Drehung beim Lösen vom Steg (8) abtrennbar ist.Smoke detector comprising an upper, in particular room cover-side housing part (2) and a lower, in particular room-side housing part (1) which are connectable to each other by means of a positive, releasable rotary connection, wherein between the housing parts (1,2) a device for smoke detection is arranged, characterized characterized in that the lower housing part (1) has a display element (5) which can be moved out of the housing part surface and which has a web (8) extending to the bottom of the upper housing part (2), whose end pointing to the floor is one from the web (8). a detachable head (7) and at the bottom (2a) an engagement portion (10) is arranged, with which the head (7) by rotation of the lower (1) relative to the upper housing part (2) during fastening engageable and in a Rotation when releasing from the web (8) can be separated. Rauchmelder nach Anspruch 1, dadurch gekennzeichnet, dass ein dem Boden (2a) des oberen Gehäuseteils (2) gegenüberliegender Bereich des unteren Gehäuseteils (1) eine Ausnehmung (4) aufweist, in der als Anzeigeelement (5) ein die Ausnehmung (4) verschließendes Gehäusewandelement (5) einliegt.Smoke detector according to Claim 1, characterized in that an area of the lower housing part (1) opposite the bottom (2a) of the upper housing part (2) has a recess (4) in which the recess (4) closes as a display element (5) Housing wall element (5) rests. Rauchmelder nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Anzeigeelement (5) in die Richtung nach außen kraftbelastet ist, insbesondere durch ein Federelement und nach Abtrennung des Kopfes (7) vom Steg (8) gegenüber der umgebenden Gehäuseoberfläche des unteren Gehäuseteils (1) vorsteht.Smoke detector according to one of the preceding claims, characterized in that the display element (5) is force-loaded in the outward direction, in particular by a spring element and after separation of the head (7) from the web (8) relative to the surrounding housing surface of the lower housing part (1 ) protrudes. Rauchmelder nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Eingriffsbereich (10) eine um die Drehachse (3) der Gehäuseteile (1,2) teilkreisbogenförmig gekrümmte Führungskulisse (10) umfasst, in die der Kopf (7) bei einer Drehung beim Befestigen der
Gehäuseteile (1,2) einfährt und die zumindest an ihrem Ende (10a) eine mit dem Kopf (7) zusammenwirkende Trennvorrichtung aufweist.Smoke detector according to one of the preceding claims, characterized in that the engagement region (10) around the axis of rotation (3) of the housing parts (1,2) partially arcuately curved guide slot (10), in which the head (7) upon rotation during mounting of the
Housing parts (1,2) retracts and at least at its end (10a) has a cooperating with the head (7) separating device. Rauchmelder nach Anspruch 4, dadurch gekennzeichnet, dass die Führungskulisse (10) wenigstens eine zur Bodenaussenfläche weisende Gleitfläche aufweist, an welcher der Kopf (7) mit einer zum unteren Gehäuseteil (1) weisenden Kopffläche (7a) bei einer Drehung beim Befestigen entlang gleitet, wobei der Abstand der Gleitfläche zum unteren Gehäuseteil (1) mit fortschreitendem Drehwinkel zunimmt.Smoke detector according to Claim 4, characterized in that the guide slot (10) has at least one sliding surface facing the bottom outer surface, on which the head (7) slides with a head surface (7a) facing the lower housing part (1) during a rotation during fastening, wherein the distance of the sliding surface to the lower housing part (1) increases with increasing angle of rotation. Rauchmelder nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass am Ende (10a) der Führungskulisse (10) ein Rastelement angeordnet ist, mit dem der Kopf (7) verrastet und nach Verrastung ortsfest festgelegt ist.Smoke detector according to claim 4 or 5, characterized in that at the end (10a) of the guide slot (10), a latching element is arranged, with which the head (7) is locked and fixed in place after latching. Rauchmelder nach einem der vorherigen Ansprüche 4 bis 6, dadurch gekennzeichnet, dass dem Verlauf der Führungskulisse (10) folgend in der Führungskulisse (10) ein Messer (9) angeordnet ist, bei welchem der radiale Abstand der Messerschneide (9c) zur Drehachse (3) mit fortschreitendem Drehwinkel beim Befestigen zunimmt.Smoke detector according to one of the preceding claims 4 to 6, characterized in that following the course of the guide slot (10) in the guide slot (10) a knife (9) is arranged, wherein the radial distance of the knife edge (9c) to the axis of rotation (3 ) increases with increasing angle of rotation during mounting. Rauchmelder nach Anspruch 7, dadurch gekennzeichnet, dass das Messer (9) am Anfang der Führungskulisse (10) am Boden (2a) befestigt ist und ein freies bewegliches Ende (9b) aufweist, insbesondere wobei der Abstand der vom Boden (2) wegweisenden Messeroberfläche zum unteren Gehäuseteil (1) mit fortscheitendem Drehwinkel abnimmt.Smoke detector according to claim 7, characterized in that the knife (9) at the beginning of the guide slot (10) is fixed to the bottom (2a) and a free movable end (9b), in particular wherein the distance of the ground (2) pointing away the knife surface decreases to the lower housing part (1) with advscheitendem angle of rotation. Rauchmelder nach Anspruch 8, dadurch gekennzeichnet, dass das Messer (9), insbesondere zumindest dessen freies Ende (9b), von der dem Boden (2) zuweisenden Seite (7b) des Kopfes (7) bei einer Drehung beim Befestigen in Richtung zum Boden (2) verlagerbar / verlagert ist.Smoke detector according to claim 8, characterized in that the knife (9), in particular at least its free end (9b), of the bottom (2) facing side (7b) of the head (7) in a rotation when mounting in the direction of the ground (2) relocatable / relocated. Rauchmelder nach einem der vorherigen Ansprüche 8 oder 9, dadurch gekennzeichnet, dass am Ende der Drehung zum Befestigen die Messerschneide (9c) am freien Ende (9b) des Messers (9) über derjenigen Fläche (7a) des Kopfes (7) angeordnet ist, die zum unteren Gehäuseteil (1) weist.Smoke detector according to one of the preceding claims 8 or 9, characterized in that at the end of the rotation for fixing the knife edge (9c) at the free end (9b) of the knife (9) above that surface (7a) of the head (7) is arranged which points to the lower housing part (1). Rauchmelder nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass Anzeigeelement (5) und Steg (8) miteinander lösbar verbunden / verbindbar sind.Smoke detector according to one of the preceding claims, characterized in that the display element (5) and web (8) are detachably connected to each other / connectable.
EP10013581A 2009-12-16 2010-10-13 Smoke alarm Active EP2336991B1 (en)

Applications Claiming Priority (1)

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