WO2010112232A1

WO2010112232A1 - Alarm device

Info

Publication number: WO2010112232A1
Application number: PCT/EP2010/002108
Authority: WO
Inventors: Reinhard Hübner
Original assignee: ERÜ Kunststofftechnik GmbH
Priority date: 2009-04-01
Filing date: 2010-04-01
Publication date: 2010-10-07
Also published as: WO2010112232A8; DE202009004527U1

Abstract

The invention relates to an alarm device (21), wherein a force (F) is generated or removed in case of removal of a first fixed body (35) from an adjacent second fixed body (34), which force influences a circuit element (25) in an electrical circuit in order to generate an electrical alarm signal. An alarm device (21), which can be realized fast and without great effort and which can in particular also be retro-fitted, is realized according to the invention by the circuit element being designed as a first strain gauge (25).

Description

alarm system

The invention relates to an alarm system in which, in the case of removal of a first fixed body from an adjacent second fixed body, a force (F) is generated or eliminated which affects a switching element in an electrical circuit to produce an electrical alarm signal.

The invention further relates to an alarm system in which, in the case of removal of a first fixed body from an adjacent second fixed body, a force (F) is generated or eliminated which affects a switching element in an electrical circuit to generate an electrical alarm signal, in which a switching device for arming or switching off the alarm system is arranged.

Such alarm systems are known in various embodiments in home installations. They are z. B. connected by cables with a central alarm system or networked with the home installation. As a switching element is for example a micro switch, the z. B. a window sash is switched. At such a switch high reliability requirements are made. In particular, these requirements lead to an increase in the cost of these alarm systems with regard to the required long-term stability and climatic resistance. In addition, retrofitting such alarm systems is very expensive: For example, an installation on windows and doors with particularly laborious and therefore costly work related to a visually disruptive wiring and their ancillary work. The invention aims to remedy this situation.

The invention is based on the desire to show at least one alarm system of the aforementioned types, which can be realized quickly and easily and in particular can also be retrofitted.

Starting from an alarm system in which, in the case of removal of a first solid body from a neighboring second solid body, a force is generated or eliminated, which affects a switching element in an electrical circuit to produce an electrical alarm signal, the invention proposes that the switching element is formed as a first strain gauge.

Such a strain gauge may in particular have a very small and thin shape and therefore requires very little space. It is robust against environmental influences of any kind, especially against moisture and very inexpensive to manufacture and use, as will be explained below.

Starting from an alarm system in which, in the case of removal of a first fixed body from an adjacent second fixed body, a force (F) is generated or eliminated which influences a switching element in an electrical circuit to produce an electrical alarm signal If a switching device for arming or switching off the alarm system is arranged, the previously derived and indicated object is also achieved in that this switching device comprises a second strain gauge.

In this case, the term "second strain gauge" is not to be understood as meaning that a first strain gage is necessarily present in the presence of a second strain gage, but this designation merely serves to distinguish between the two strain gauges.

Incidentally, the switching element may also be a reed contact which is actuated by a force (F) caused by a magnetic field.

According to an advantageous embodiment of the invention, it is provided that the alarm system combines both the features of claim 1 and the features of claim 2.

In a development of the invention, the first strain gauge can be part of a deformation, such as bending and / or torsion claimed be first beam. This first bar may in turn be part of an electrical circuit board, the z. B. rigid or flexible, but reinforced or combined rigid-flexible may be formed. It is only important that a part or section of the printed circuit board or at least its support has a certain flexibility, under the use of which, by applying a force, the first strain gauge can be deformed. The degree of deformation changes the conductivity of the first strain gauge and influences the downstream electrical evaluation circuit as a result of the changed resistance value: The switching signal for the alarm display, of whatever type, is generated.

The invention also makes it possible for further components to be present on the same printed circuit board for the voltage supply and / or for displaying the operating state and / or for signal transmission and / or for alarm indication. Thus, a number of functions can be cost-effectively pulled together in a small space. Consequently, it is particularly space-saving and inexpensive, when the circuit board is designed as a printed circuit board. Their shape and training can, as already indicated above, the particular application without much effort and are very versatile.

For deformation of the first strain gauge is at least indirectly exert a force on this. For this purpose, the invention preferably provides that on the first beam itself a protruding plunger for receiving and transmitting a force acting on the first beam force is arranged. Such a usually small pestle can be realized with little effort. If, for example, the first strain gauge and optionally the further electrical components and optionally the plunger are designed as SMD components, the plunger can also be applied in the same method step.

En plunger can also be stored independently on or in one of the two bodies as a fixed or limited movable plunger, which directs the force on the first beam. A solid plunger may, in principle, be in the form of a small nail or solid glued plate or the like to transmit the force to the first beam or the like. - -

An embodiment of the invention provides that in the sharp initial position of the alarm system, the plunger elastically deforms the first bar by applying the force and the force is eliminated in the alarm state, so that the first beam is relaxed.

In order to be able to apply the invention to bodies of different thicknesses, provision can be made for the length of the pushrod to be adjustable. For this purpose, z. For example, a screw with an internally threaded sleeve can be used.

In order to prevent excessive deformation, which may even lead to breakage of the first beam or the like, it is proposed that a stop be provided near the first beam, eg, on the printed circuit board or on a body, which prevents the deformation of the first beam Baren limited.

According to an advantageous development of the second independent teaching of the invention, it is provided that the second strain gauge is part of a claimed on deformation second beam.

In a preferred embodiment of the invention it is provided that the second beam is part of an electrical circuit board.

It is important that a part or section of the printed circuit board or at least its carrier has a certain flexibility, under the use of which, by applying a force, the second strain gauge can be deformed. The degree of deformation changes the conductivity of the second strain gauge and affects the switching device due to the changed resistance value.

That which has been carried out to the general characteristics of the first strain gauge or of the first beam, applies mutatis mutandis to the second strain gauge or the second beam.

According to an advantageous development of the invention, it is provided that the first solid body or the second solid body has an operating element. indicates and the second bar is indirectly or directly claimed by the control element to deformation.

In this case, the operating element allows the removal of the two solid bodies from each other in a permissible manner, d. H. in a way that does not trigger an alarm. Usually, the control element allows a differentiated operation of the two fixed bodies, so that depending on the type of operation, for example, by bringing the control element in a defined position, for example, only a limited or a partial removal of the two fixed body is possible from each other.

It has been found to be particularly advantageous that the operating element is designed to be pivotable and the second beam is subject to different degrees of deformation as a function of the position of the operating element.

For example, the operating element can be designed as a pivotable handle, which essentially has the shape of a door latch. The fact that the position of the control element has an influence on the strength of the deformation of the second beam, thus also results in an influence on the strength of the strain of the second strain gauge. The strength of this strain in turn affects the switching device and is accessible via the resistance of the second strain gauge of a measurement.

According to a further advantageous embodiment of the invention, it is provided that the control element has an encoder, via which the second beam is subjected to deformation, and the strength of the deformation of the second beam based on the coding predetermined by the coding conclusions on the position of the control allowed.

Preferably, the coding device is arranged as an annular disc coaxially on a pivot axis of the operating element and connected thereto in such a way that the coding device retraces any pivotal movement of the pivot axis. Here, the second bar is, for example, by different elevations, which are arranged on the coding device or formed in the coding device, depending on the position of the operating element un - -

severely deformed. Since codings of the coding device are conceivable, over which each position of the control element at most a strength of the deformation of the second beam can be assigned, the position of the control element can be clearly determined in such codes on the measurement of the resistance of the second strain gauge. This information is then available to the alarm system for further use, for example for arming or switching off the alarm system or more complex applications. For example, in the case of an alarm system, which represents a window lock, it can be determined from this information whether the pivoting control element is in an undesired intermediate position between a locking position and an open position and this information can be output, for example, via a signal tone or an optical display.

From this it can be seen that the switching device is not to be understood simply in terms of a simple, two-valued switch, but rather as an electrical circuit for detecting the state of influence of the second strain gauge.

The invention advantageously finds particular application in an alarm system, which is characterized by its arrangement on a movable body for closing an opening. In this regard, particular reference is to an arrangement on a window, on a door, on a hatch or on a lid of a container or the like. In these applications, the invention helps to prevent burglaries or thefts or at least considerably complicate.

Further features and advantages of the invention are also the embodiments of the invention illustrative drawings and their subsequent description can be removed.

Fig. 1 shows a schematic representation of the plan view of a wired circuit board with a first bending beam and a second bending beam together with the first strain gauge and second strain gauges mounted thereon. Fig. 2 shows the circuit board of Fig. I in side view.

Fig. 3 shows a simplified representation of a longitudinal section through a first window on which a first alarm system is mounted, the section III-III in Fig. 1 accordingly

Fig. 4 shows a simplified representation of a longitudinal section through a second window to which a second alarm system is attached.

Fig. 5 shows a simplified representation of an alarm system according to the invention according to a further preferred embodiment of the invention.

6 shows a simplified representation of a detail of the inventive alarm system according to the further preferred

Embodiment of the invention.

7 shows, in a simplified representation, a further detail of the alarm system according to the invention according to the further preferred embodiment of the invention.

The alarm system 21 comprises, according to FIG. 1, a rigid printed circuit board in the form of a circuit board 22 on which a number of electrical or electronic components are applied and wired in SMD technology. The board 22 comprises two tongue-like protruding and a somewhat flexible first bending beam 23 and a somewhat flexible second bending beam 24, on which near its connection to the rest of the substantially rigid board 22 flat, thin resistors in the form of a first strain gauge 25 and a second strain gauge 26 are firmly applied.

Indicated, but without their wiring, are other components, such as battery or battery 27, which can serve as a buffer in addition to a power supply, not shown, radio receiver 28 for switching on and off the alarm system 21 from a distance, an LED display 29 for viewing the operating state on / off, a tweeter 30 and a radio transmitter - o -

31 for switching a remotely located, not shown, warning device, such as siren, light or the like. Also not shown is a photoelectric cell for charging the said battery. The invention may, in addition to the first strain gauge 25 and the second strain gauge 26, be readily provided with other or additional components. A first region 32 and a second region 33 of the first bending beam 23 and of the second bending beam 24, which are intended to apply a force F, are indicated in FIG. 2. The assembled board 22 of FIG. 1 is shown in side view in FIG.

According to the section in Fig. 3, a vertical window frame 34 is shown, against which an adjacent window sash 35 in the closed state. The sash 35 has a horizontal, continuous bore 36, in the game with a ram 37 is mounted. His storage is trapped, d. H. he is within the bore by appropriate, not shown, possibly spring-loaded means only limited mobility, so it can neither right nor left right out of the bore 36

The plunger 37 rests on the one hand with its left end 38 on the inside 39 of the window frame 34. On the other hand, it bears with its right end 40 against the first region 32 of the first bending beam 23, cf. FIG. For this purpose, the board 22 on the right inner side 41 of the sash 35 is applied flat and fixed, z. B. glued or screwed so that the applied components, see Fig. 1, are outside. The length L of the plunger 37 may be variably adjustable by corresponding means, not shown. It is so large that in the illustrated, closed state of the window sash 35, the flexible first bending beam 23 is bent slightly to the right under the force F: The first strain gage 25, see FIG. 1, is bent and influences the said evaluation circuit accordingly. In order to avoid undue overbending of the first strain gauge 25 and the first bending beam 23, a stop 42 for the end 40 and the first bending beam 23 is mounted on the board 22 or on the inside 41 of the sash 35. However, if the plunger 37 is caught tight enough, the stop 42 can be omitted. If the window sash 35 is to be opened in a permissible manner from the inside, the function of the first strain gage 25 and thus the alarm system 21 are switched off via the second bending beam 24 (not shown in more detail) acting as an on / off switch for the alarm device 21. Thereafter, the alarm system 21 is armed, so that the function of the first strain gauge 25 is activated again. If now an unauthorized opening from the outside, then the sash 35 moves away to the right, away from the window frame 34, the plunger 37 moves under the spring force of the flexible first bending beam 23 to the left and leaves the first bending beam 23 also to the left , in the relaxed state, cf. Fig. 2, bend: The evaluation circuit reports this state of the first strain gauge 25 and actuates the connected Alarmanzeigevorricht- tions 30 and 31st

In Fig. 3, the board 22 is applied to the inside 41 of the sash 35. Although this is a convenient attachment, but requires the described bore 36 with a relatively long, albeit thin plunger 37th

In Fig. 4, the board 22 is mounted on the window frame 34 facing the outside 43 of the sash 35. This can be done by engaging in a correspondingly large recess 44. As a ram 45 here is a small nail or a cured adhesive dot of sufficient size on the inside 39 of the window frame 34. But it is also a small increase on the left side of the first bending beam 23 possible, which takes over the function of a plunger. This increase is to be mounted in the designated in Fig. I 32 with the first area and can also z. B. consist of a soldering point.

Whether it be a nail or a small body on the window frame 34, be it a corresponding arbitrary elevation on the first bending beam 23 itself, all cause, when the closed casement 35 is closed, as shown, the first bending beam 23 is elastically bent to the right and thus the first strain gauges 25 as already described to Fig. 3 functions. However, it must be ensured here that the first bending beam 23 together with the first strain gauge 25 for bending to the right - -

into a small airspace 46 can dodge though. However, there is no risk of undue overstretching of the first bending beam 23 or the first strain gauge 25, since the size of the deflection of the first bending beam 23 is fixed. If necessary, the length of the plunger 45 can be made adjustable, z. B. by arranging a length-adjustable screw instead of the illustrated nail.

FIG. 5 shows an alarm system 21 according to the invention in accordance with a further preferred embodiment of the invention. The essential parts of the electronic components of the alarm system 21 are arranged on a circuit board 22. The power supply is ensured by two batteries 27. The contacting of the batteries 27 is effected by spring contacts 47 and flat contacts 48. The board 22 is mounted on a base plate 49. The alarm system 21 has a pivotable operating element 50. On the pivot axis 51 of the operating element 50, a coding device 52 is arranged.

By not showing one of the two flat contacts 48 and the batteries 27, the second bending beam 24 can be seen here, which is a part of the board 22. The second bending beam 24 has a second region 33 which is in contact with the coding device 52 arranged on the pivot axis 51 of the operating element 50 such that the second bending beam 24 is subjected to deformation via the coding device 52.

Fig. 7 shows a simplified representation of a further detail of the alarm system according to the invention 21 of FIG. 5. Here, the alarm system 21 is shown from the side, which is mounted for example on the frame of a window, not shown, to be secured. Clearly visible is the second bending beam 24 which is claimed on the arranged on the pivot axis 51 of the operating element 50 encoder 52 to deformation. LIST OF REFERENCE NUMBERS

21 alarm system

22 board 23 first bending beam

24 second bending beam

25 first strain gauge

26 second strain gauges

27 Battery 28 Radio receiver

29 LED display

30 tweeters

31 radio transmitters

32 first area 33 second area

34 window frames

35 window sashes

36 bore

37 ram 38 left end

39 inside

40 right end

41 inside

42 stop 43 outside

44 recess

45 pestles

46 Airspace F Force L Length of 37

47 spring contact

48 flat contact

49 base plate

50 control element 51 pivot axis

52 encoder

Claims

- Patent claims:

An alarm system (21) in which, in the case of removal of a first fixed body (35) from a neighboring second fixed body (34), a force (F) is generated or eliminated which affects a switching element (25) in an electrical circuit to generate an electrical alarm signal, characterized in that the switching member (25) as a first strain gauge (25) is formed.

2. An alarm system (21), wherein in the case of removal of a first fixed body (35) from an adjacent second fixed body (34), a force (F) is generated or eliminated, which affects a switching member (25) in an electrical circuit to generate an electrical alarm signal in which a switching device for arming or switching off the alarm system (21) is arranged, characterized in that this switching device comprises a second strain gauge (26).

3. alarm system (21) according to claim 1 and 2, characterized in that the alarm system (21) combines both the features of claim 1 and the features of claim 2.

4. Alarm system (21) according to any one of claims 1 or 3, characterized in that the first strain gauge (25) is part of a claimed on deformation first beam (23).

5. Alarm system (21) according to claim 4, characterized in that the first bar (23) is part of an electrical circuit board (22).

6. alarm system (21) according to claim 5, characterized in that on the same circuit board (22) components (27 to 31) for the power supply, - -

and / or for displaying the operating state and / or signal transmission and / or the alarm display are present.

7. Alarm device according to one of claims 4 to 6, characterized in that on the first bar (23) itself a protruding plunger (37, 45) for

Receiving and transmitting a on the first beam (23) acting force (F) is arranged.

8. Alarm system (21) according to any one of claims 1 or 3 to 7, character- ized in that the first strain gauge (25) and optionally the other electrical components (27 to 31) and optionally the plunger (37, 45) as SMD Components are formed.

9. Alarm system (21) according to any one of claims 4 to 8, characterized in that on or in one of the two bodies (34, 35) a fixed or limited movable plunger (37, 45) is mounted, the force ( F) on the first bar (23) passes.

10. Alarm system (21) according to claim 9, characterized in that in the sharp initial position of the plunger (37, 45) the first bar (23) below

Application of the force (F) elastically deformed and in the alarm state, the force (F) is eliminated.

11. Alarm system (21) according to claim 9 or 10, characterized in that the plunger (37, 45) in its length (L) is adjustable.

12. Alarm system (21) according to any one of claims 4 to 11, characterized in that near the first beam (23) has a stop (42) is provided which limits the deformation of the first beam (23).

13. Alarm system (21) according to claim 2 or 3, characterized in that the second strain gauge (26) is part of a claimed on deformation second beam (24).

14. Alarm system (21) according to claim 13, characterized in that the second beam (24) is part of an electrical circuit board (22). - -

15. Alarm system (21) according to claim 13 or 14, characterized in that the first fixed body (35) or the second fixed body (34) has an operating element (50) and the second beam (24) directly or indirectly by the operating element (50) is subject to deformation.

16. Alarm system (21) according to claim 15, characterized in that the operating element (50) is designed to be pivotable and the second beam (24) in response to the position of the operating element (50) is subjected to different degrees of deformation.

17. Alarm system (21) according to claim 16, characterized in that the operating element (50) has an encoder (52), via which the second beam (24) is subjected to deformation, and the strength of the deformation of the second beam (26). on the basis of the coding by the encoder (52) predetermined conclusions on the position of the control element (50) allowed.

18. Alarm system (21) according to any one of claims 1 to 17, characterized by its arrangement on a movable body (35) for closing an opening (34).

19. Alarm system (21) according to claim 18, characterized by its arrangement on a window (34, 35), on a door, on a hatch or on a cover.