CN1178181C

CN1178181C - Fire alarm

Info

Publication number: CN1178181C
Application number: CNB001047027A
Authority: CN
Inventors: P��³��; P·格鲁伯
Original assignee: Siemens Building Technologies AG
Current assignee: Siemens AG
Priority date: 1999-03-22
Filing date: 2000-03-22
Publication date: 2004-12-01
Anticipated expiration: 2020-03-22
Also published as: ES2287990T3; DK1039427T3; NO20001499L; DE59914326D1; ATE361515T1; EP1039427A1; CN1270375A; NO20001499D0; EP1039427B1

Abstract

Evaluation electronics circuit board (L) has contact strip which is fitted into plug strip (8) of socket by translatory movement when alarm insert (2) is twisted to fit into socket (1). Fire alarm has socket (1) with multi pin plug strip (8) and alarm insert (2), to fit into socket, with circuit board (L) containing evaluation electronics. Electrical connection between socket and insert is by plug connection. To connect them, alarm insert is twisted relative to socket whereby contact strip of circuit board is pressed into plug strip in translatory movement. Socket has guides for the circuit board to be inserted. Circuit board is arranged in a box-like housing. Alarm insert is then set into socket in vertical linear movement, whereby contact strip is aligned with plug strip of socket.

Description

Fire alarm

Technical field

The present invention relates to a kind of fire alarm, it has a pedestal that is provided with a multicore bar socket and one and can insert in the pedestal and comprise a sensing system and an alarm component that has the printed circuit board (PCB) of evaluation electronic circuit, wherein the electrical connection between pedestal and the alarm component realizes by patching to connect, and, can rotate alarm component relative to pedestal in order to form this connection.

Background technology

On this class fire alarm of in DE-U-9210858.3, describing, an alarm pedestal that for example is made of simple injection molded comprises a multi-core connector piece that has required jack, and alarm component has a contact strips that has the respective contacts pin, when the alarm of packing into (alarm component add alarm lid), contact strips disposes to connector block in the pressure mode.Alarm component is arranged in the annular alarm lid rotationally and can be locked on its final position.For this reason, alarm component has an annular sidewall, and it plays the effect of the ring that centers.But alarm lid mechanical interlocking ground is contained on the alarm pedestal, and wherein when loading onto alarm, one is molded in the guide slide of inclination extension that interlock cam that alarm covers is directed into an interlocking slideway.The latter is configured in alarm lid side in this wise, so that can obtain to patch in order to formation the vertical uplift displacement of connection when loading onto and rotate alarm.

Except the certain danger that causes interlock mechanism's damage by incorrect operation, no matter be provided with the interlock mechanism of interlocking slideway and interlock cam or make the connection that patches between connector block and the contact strips all cause the increase of manufacturing cost by vertical ascending motion, this is beyond doubt individual shortcoming for the product that resembles the such large-scale production of fire alarm.

Especially the connection that patches that is caused by vertical ascending motion has increased manufacturing cost.Because, on the one hand, the position of reach the tram for the rotation by alarm at first makes contact strips, promptly not only aiming at but also be separated by and careful and produce reliably and electrically contact the infrastructure cost that can not ignore when vertical ascending motion then with it with connector block.On the other hand, this connected mode that patches need be arranged up contact strips on the direction of vertical printed circuit plate, and this just need carry out the assembling of discrete parts on printed circuit board (PCB).The assembling of this discrete parts needs the job step of adding again.

Summary of the invention

Now by the present invention, the fire alarm that reply this paper begins described type is made such improvement: reach the considerable decline of manufacturing cost, and can be to the durability of alarm or operability-especially alarm component is installed on the pedestal or from it and take off-bring adverse effect.

This task will solve in this wise by the present invention, and promptly printed circuit board (PCB) has a contact strips, and when rotating alarm component, this contact strips is inserted in the bar socket with a translation motion.

According to the present invention, a kind of fire alarm is provided, has a pedestal and an alarm component that is provided with a multicore bar socket, this alarm component can be inserted in this pedestal and comprise a sensing system and a printed circuit board (PCB) that has the evaluation electronic circuit, wherein the electrical connection between described pedestal and alarm component realizes by patching to connect, and in order to form this connection, can rotate alarm component with respect to pedestal, printed circuit board (PCB) has a contact strips, when rotating alarm component, this contact strips is inserted in the bar socket with a translation motion; It is to realize with vertical rectilinear motion that alarm component is inserted in the pedestal, wherein makes contact strips reach the position of aiming at the bar socket of pedestal; Be provided with the device that is used for the rotation of alarm component is converted to the translation motion of printed circuit board (PCB), this device comprises the guide perpendicular to the bar socket orientation that is arranged in the pedestal.

This contact strips has its advantage, promptly need not the discrete plug-in unit of assembling on printed circuit board (PCB), has saved the cost that is used for it and assembles it thus.The translation motion that makes the contact strips of printed circuit board (PCB) insert bar socket based on the rotation of alarm component has such advantage, and the alarm that promptly is lifted on the ceiling can be with traditional alarm more changing device replacing or " taking ".This alarm more changing device is the cup part that is fixed on the bar, by it can on about 7m height by pressing and rotation makes pack into pedestal or take off from pedestal of fire alarm (alarm component is added a cover), and need not servicing unit such as ladder.

It is known by EP-A-0772170 that a kind of band has the fire alarm of printed circuit board (PCB) of contact strips itself.Owing on this fire alarm, pack into pedestal be by alarm component vertical movement and then move horizontally realization, so alarm can not with traditional alarm more changing device change.

The fire alarm of first preferred implementing form is characterised in that according to the present invention: it is to realize with vertical rectilinear motion that alarm component is inserted in the pedestal, wherein makes contact strips reach the position of aiming at the bar socket of pedestal.

The fire alarm of second preferred implementing form is characterised in that according to the present invention: be provided with the device that is used for the rotation of alarm component is converted to the translation motion of printed circuit board (PCB).

The fire alarm of the 3rd preferred implementing form is provided with the guide perpendicular to the translation motion bar socket orientation, that be used for printed circuit board (PCB) in pedestal according to the present invention.

The fire alarm of the 4th preferred implementing form is characterised in that according to the present invention: printed circuit board (PCB) is set in the box-shaped casing, and contact strips is stretched out from shell; Reach described guide formation folder shape and be provided with and be used to guide shell.

The fire alarm of the 5th preferred implementing form is characterised in that according to the present invention: printed circuit board (PCB) and described box-shaped casing constitute the ingredient of sensing system.

The fire alarm of the 6th preferred implementing form is characterised in that according to the present invention: alarm component has a shell spare that has the sheet bottom, imports sensing system thereon rotationally.

The fire alarm of another preferred implementing form is characterised in that according to the present invention: printed circuit board (PCB) and/or box-shaped casing are provided with guide piece, are used for touching on the respective profile of sheet bottom and/or are overlapped on the sheet bottom periphery and/or are directed at the guide slide of being located on the sheet bottom.

When alarm component when pedestal rotates, sensing system rotates in shell spare by the interaction between guide piece and the guide slide.In the case, folder shape guide that will be by pedestal and the straight line mandatory guidance between the box-shaped casing make the rotation of sensing system convert the translation motion of printed circuit board (PCB) to and convert to thus and make contact strips be inserted into insertion campaign in the bar socket.

Description of drawings

Below will explain the present invention by an embodiment who describes in the accompanying drawings; Accompanying drawing is:

Fig. 1: by an axial, cross-sectional view according to fire alarm of the present invention, wherein alarm component is not inserted in the pedestal;

Fig. 2: by an axial, cross-sectional view of fire alarm among Fig. 1, wherein alarm component has been inserted in the pedestal;

Fig. 3: alarm component be in its not with a top view of the position of pedestal interlocking; Fig. 4: alarm component be in its with a top view of the position of pedestal interlocking;

Fig. 5: the vertical view of a part of alarm component; And

Fig. 6: the view among Fig. 5 on the arrow VI direction.

Embodiment

Fire alarm in the accompanying drawings is made up of three chief components in known manner, promptly by pedestal 1, and alarm component 2 and cover 3 and form.In Fig. 1 alarm component 2 have hacures, these hacures to have in the direction shown in this figure bottom right square frame.In Fig. 3 and 4, alarm component 2 also hacures are arranged, and relative Fig. 1 of fire alarm and 2 turns over 90 °, in addition, omitted pedestal 1 in Fig. 3.In Fig. 4 to pedestal 1 only express from above appreciable outward flange R.The sensor-based system 4 of Fig. 5 and 6 expression alarm component 2, it also is to constitute in the shell spare 5 of a part of alarm component 2 that the latter is installed in.

Pedestal 1 is provided for being installed on the ceiling in a room to be monitored, wherein this installation or directly carry out on a concealed wire box or carry out with a corresponding pedestal decorative accessory.Basically by a plectane 6 and thus upwards and the pedestal 1 formed of the frame 7 that stretches out downwards comprise a bar socket 8, at Fig. 1, this bar socket dots in 3 and 4.Alarm component 2 comprises a contact strips 9 that is used to insert bar socket 8.

Sensing system 4, can especially clearly find out, form by a cylindrical photoelectric measurement chamber M and a printed circuit board (PCB) L who is arranged in the box-shaped casing 10 with evaluation electronic circuit from Fig. 5 and 6.Measuring chamber M shields along its edge keeping off outside light, and comprises a light source, optical receiver and an aperture and a so-called labyrinth with known manner, and the latter can avoid light beam to arrive optical receiver from light source through direct-path.

The below tegmentum 11 of measuring chamber M covers, and this lid has a lot of apertures so that cigarette enters measuring chamber M like the mode of sieve.M does not at length describe for measuring chamber, and its detail section can be with reference to EP-A-0772170 and EP-A-0821330.At measuring chamber M and cover the godet 12 that is provided with a sub-elliptical shape between 11, its function will be described below.This godet for example can or cover 11 global formations with measuring chamber M; Importantly, it stretches out more the edge that surpasses measuring chamber M on the direction of contact strips 9 than on other direction.

Be located at printed circuit board (PCB) L in the shell 10, that have the evaluation electronic circuit and on a side of bar socket 8, have contact strips 9, can be inserted in the bar socket 8 (to this especially can referring to Fig. 3 and 4) by moving on the arrow A direction in Fig. 5 at it.A fundamental characteristics of this illustrated fire alarm is that the rectilinear motion of the contact strips 9 of shell 10 can be realized by shell spare 5 relative the rotatablely moving of pedestal 1 of alarm component 2.For this reason, the sensing system 4 in the shell spare 5 can cause moving on the direction direction vertical with bar socket 8, wherein is provided with the straight-line device that rotation or rotation with shell spare 5 convert sensing system 4 to.

Shell spare 5 is made up of a wall that narrows down downwards 13, and its below terminates on the ring segment of inwardly stretching 14.The internal diameter of sheet 14 is greater than the maximum outside diameter of dish 12, so Sensor section 4 can be without difficulty from the top be packed shell spare 5 into.As from Fig. 1, can find out on 2,5 and 6, on measuring chamber M, fixing two inwardly outstanding diametrically guide vanes 15 below the shell 10.Guide vane is configured the L type and formalizes like this and sizing, and promptly they are overlapped on the below of sheet 14.Sheet 14 is provided with corresponding flute profile recess 16, is used to push guide vane 15.

That sheet 14 has is a plurality of, be illustrated as three perforation, and they are used to lock make covers 3 ratchets 17 that are fixed on the shell spare 5.Lid 3 has the rib 18 coboundary one segment distance, that extend into lid inside that has ratchet 17 from it, is used for the dish 12 of supporting sensor system 4.

For sensing system 4 is put into shell spare 5, guide vane 15 is pushed by recess 16, dish 12 is located cover on 3 the rib 18 and makes guide vane 15 be overlapped on shell spare 5 sheet 14 below.Be provided with four cam guides 19 in the bottom side of the shell 10 that circuit board is housed, when sensing system 4 was put into, these cam guides just contacted with control cam 20 on the sheet 14 that is located at shell spare 5 and accept the latter's guiding.Sensing system 4 by coil 12 and guide vane 15 be fixed on shell spare 5 in vertical direction and cover in 3, and determined certain angle of rotation between sensing system 4 and the shell spare 5 by cam guide 19 and control cam 20.

It is to finish on relative position shown in Figure 4 that sensing system 4 is put into shell spare 5; After guide vane 15 is pushed flute profile recess 16, make sensing system 4 counter-clockwise direction on the sight line of Fig. 3 and 4 rotate 24 ° and reach the position shown in Fig. 3.24 ° angle of rotation is predetermined by control cam 20.Sensing system 4 is and then by guide vane 15 and coil 12 and be imported in the shell spare 5 when rotation sensor system 4.The alarm component 2 that assembles so then just can be inserted in the pedestal 1 with the lid of fixing on it 3.

Pedestal 1 has three each other at a distance of 120 ° guide groove 21 at its edge R, and they are used to push the guide block 22 of alarm component 2.As finding out from Fig. 3 and 4, guide groove 21 and guide block 22 constitute in this wise, and promptly alarm component 2 only can be inserted in the pedestal 1 on single orientation.Alarm component 2 is pushed into pedestal 1 on position shown in Figure 3, guide block 22 is aimed at guide groove 21 on this position, and wherein contact 9 is parallel to bar socket 8 and just in time is positioned at its front.

Then alarm component 2 and lid 3 are turned to from position shown in Fig. 3 shown in Fig. 4 on the position, wherein contact strips 9 will be pushed in the bar socket 8.Having formed the pressure straight line that contact strips 9 is pushed in the bar socket 8 between pedestal 1 and alarm component 2 guides.The guiding of this pressure straight line is to form by the rail shape slide block 24 leading folder 23 (Fig. 4) and being located on the sidewall of box-shaped casing 10 in the pedestal 1.The sidewall that has the box-shaped casing 10 of slide block 24 has elasticity.

When alarm component 2 was passed through position shown in 24 ° of arrival of counter-clockwise direction ground rotation Fig. 4 from position shown in Fig. 3, on the one hand, cam guide 19 moved along controlling cams 20, causes the rotation axis guiding between pedestal 1 and the alarm component 2 thus; On the other hand, slide block 24 slides towards a left side in the direction of leading folder 23 upper edge arrow A (Fig. 5).When box-shaped casing 10 and thus during alarm component 2 rectilinear motions, contact strips 9 is pushed in the bar socket 8, has therefore formed electrical connection between pedestal 1 and alarm component 2.On the edge of pedestal 1 R, unshowned backstop limited the rotation of alarm component 2 and limited the rectilinear motion of contact strips 9 thus.Also be provided with in addition unshowned, make mechanically interlock device on pedestal 1 of alarm component 2.This device will work in the final stage that alarm component 2 is rotated.

Mechanical interlocking between pedestal 1 and the alarm component 2 and electrically contact to move and realize: in the first order by two-stage, alarm component 2 is pushed into the pedestal 1 from the below in vertical direction, and this shape owing to guide groove 21 and guide block 22 only can realize on the single relative position between pedestal 1 and the alarm component 2.Then in the second level, realized mechanical interlocking on the one hand by rotatablely moving of alarm component 2, realized that on the other hand contact strips 9 inserts motion to the translation in the bar socket 8, and produced electrically contacting between pedestal 1 and the alarm component 2 thus.The motion of this two-stage can by traditional, be fixed on the bar cup-shaped alarm more changing device implement.

Claims

1. fire alarm, has a pedestal (1) and an alarm component (2) that is provided with a multicore bar socket (8), this alarm component can be inserted in this pedestal and comprise a sensing system (4) and printed circuit board (PCB) (L) that one has the evaluation electronic circuit, wherein the electrical connection between described pedestal (1) and alarm component (2) realizes by patching to connect, and in order to form this connection, can rotate alarm component (2) with respect to pedestal (1), it is characterized in that: printed circuit board (PCB) (L) has a contact strips (9), when rotating alarm component (2), this contact strips is inserted in the bar socket (8) with a translation motion; It is to realize with vertical rectilinear motion that alarm component (2) is inserted in the pedestal (1), wherein makes contact strips (9) reach the position of aiming at the bar socket (8) of pedestal (1); Be provided with the device that is used for the rotation of alarm component (2) is converted to the translation motion of printed circuit board (PCB) (L), this device comprises the guide (23) perpendicular to bar socket (8) orientation that is arranged in the pedestal (1).

2. according to the fire alarm of claim 1, it is characterized in that: printed circuit board (PCB) (L) is set in the box-shaped casing (10), and contact strips (9) is stretched out from this shell; And described guide (23) is configured the folder shape and is set for guiding described shell (10).

3. according to the fire alarm of claim 2, it is characterized in that: printed circuit board (PCB) (L) and described box-shaped casing (10) constitute an ingredient of described sensing system (4).

4. according to one fire alarm in the claim 1 to 3, it is characterized in that: alarm component (2) has a shell spare (5) that has sheet bottom (14), and described sensing system (4) is guided on this shell spare rotationally.

5. according to the fire alarm of claim 4, it is characterized in that: printed circuit board (PCB) (L) and/or box-shaped casing (10) are provided with guide piece, this guide piece be adjacent to sheet bottom (14) respective profile, seal in described bottom or the guide slide on being arranged at described bottom and be directed.

6. according to the fire alarm of claim 5, it is characterized in that: described guide slide is made of control cam (20), and described guide piece is made of cam guide (19).

7. according to the fire alarm of claim 5 or 6, it is characterized in that: have the guide vane (15) that is located on the box-shaped casing (10), be used for guiding described sensing system (4) in vertical direction with respect to described sheet bottom (14).