DE102008061841A1 - Emergency hammer and hammer holder arrangement for use in e.g. bus, for breaking window during accident, has alarm device releasing alarm signal when connection between hammer holder and emergency hammer is separated or damaged - Google Patents

Abstract

The arrangement has a hammer holder (3) connected with an emergency hammer (2) by a connecting unit i.e. two-wire, electric cable (6). An alarm device releases an alarm signal when the connection between hammer holder and the emergency hammer is separated or damaged. The alarm device comprises an electronic circuit arrangement that releases the alarm signal when resistance or current flow in the electric cable is changed. An acoustic signal generator e.g. piezo loud speaker (9), is provided with a tone generator for the alarm device. The holder has an indicating element e.g. LED.

Description

The The invention relates to an arrangement of an emergency hammer and a Hammer holder. Such arrangements are mainly in buses, trams or other public Used transport. The emergency hammer is by means of the hammer holder mounted in a handy position on a wall. in the Trap of emergency situations, when, for example, the vehicle doors can not be opened by an accident, the emergency hammer is removed from the holder and smashed the windows used. One problem is that due to vandalism who often take the emergency hammers out of the wall bracket and be stolen. This is a security risk, because the emergency hammer is no longer available, and on the other hand costs for repair and replacement arise.

The known arrangements of emergency hammer and hammer holder have sealed wires against theft, but they are not an effective safeguard against theft. In the European patent application EP 0 696 528 A1 It is therefore proposed that the emergency hammer is secured by means of a steel cable to the hammer holder. The disadvantage here is that the steel cable with a knife, side cutters, etc. are severed and the emergency hammer can then be stolen.

task The invention is therefore an arrangement of an emergency hammer and to propose a hammer holder, the better against theft and Abuse is protected.

These Task is solved in that the hammer holder over a connecting means connected to the emergency hammer and an alarm device is provided, which is set up to trigger an alarm signal, if the connection between the hammer holder and the emergency hammer over the connecting means is separated or damaged. By be the alarm signal triggered by the alarm device the staff or passengers on the theft or abuse the Nothammer and the causative person can be determined. In addition, results from the alarm signal a deterrent effect. The triggered alarm signal can thereby be optical or acoustic nature.

advantageous Embodiments are specified in the subclaims and are explained below.

In a preferred embodiment is the connecting means as a, in particular zweiadriges, electrical cable formed. The cable can, for example, a circuit with a switching relay form. Once the cable is damaged or disconnected, the circuit is interrupted and the switching relay switches Alarm signal on.

If the alarm device has an electronic circuit arrangement, which is set, the alarm signal when changing of the resistance or current flow in the electrical cable, Low power is consumed and the alarm is cheaper. The electronic circuit arrangement can, for example, in a DC voltage applied to the cable, the current flow through the electrical Measure cables and trigger an alarm signal if they change. Similarly, changes may be made to the circuitry of the resistance in the cable can be measured as damaged the cable is shorted by touching the wires or by cutting through both wires an infinitely high resistance occurs. The term resistance also includes the inductive or Capacitive resistance of the electric cable, resulting in a Damage or separation of the cable changes and can be measured by the electronic circuitry. The advantage here is that, for example, when measuring the capacitive Resistance of the cable flow very low currents and the power supply is lightly loaded.

For the alarm device is provided with an acoustic signal generator, preferably a piezo loudspeaker with a tone generator. hereby can produce a high sound pressure and a piercing audible alarm signal be generated.

The Hammer holder has a transparent protective cap for holding and covering the connecting means. This is the connecting means visible from the outside, what against theft or misuse deterrent.

For the connecting means is provided a winding element, preferably a winding cross. A winding cross is inexpensive manufacture.

Around to show the status of the power supply of the alarm device, is a display element for the hammer holder, in particular a light emitting diode, provided. The power supply can, for example to be a button battery. If the voltage under a defined Value drops, the LED lights up, indicating that that the battery needs to be changed.

The The invention will be exemplified with reference to a drawing described, with further advantageous details the figures can be taken from the drawing.

functionally the same parts are provided with the same reference numerals.

The Figures of the drawing show in detail:

1 a plan view of the arrangement 1 with emergency hammer 2 and hammer holder 3 ; and

2 a schematic structure of the alarm device 28 as a circuit diagram.

1 shows a plan view of the arrangement 1 with emergency hammer 2 and hammer holder 3 , The hammer holder 3 has a housing 20 on, with screws 12 attached to a wall (not shown). The surface of the housing 20 has a trough (not shown) whose outline is approximately that of the emergency hammer 2 corresponds and which serves to its inclusion. The emergency hammer 2 is detachable in the receiving trough by means of fastening clamps 11 attached.

The emergency hammer 2 consists essentially of a handle 25 a hammerhead 4 and a tip 5 for driving glass panes. For the hammerhead 4 and the handle 25 is also a hanger 26 intended. In the lower part of the handle 25 this is one end of a two-wire, electrical cable 6 attached. The cable 6 has a length of about 1.5 m and is on a winding cross 7 wound. It is also on the case 20 the hammer holder 3 arranged, taking it from a transparent protective cap 8th recorded and covered. Not with the emergency hammer 2 connected, other end of the cable 6 is through an opening 14 in the interior of the case 20 led and with an electronic circuit 16 (not shown, see 2 ) connected. The circuit arrangement 16 forms with the cable 6 an electrical circuit. If the circuit is interrupted or shorted out by the cable 6 disconnected or damaged, then triggers the circuitry 16 An audible signal coming from the loudspeaker 9 is reproduced.

The transparent protective cap 8th and the emergency hammer 2 are together by means of a seal 21 on the housing 20 secured. Should the emergency hammer 2 for use from the hammer holder 3 be removed, then the seal 21 opened and the emergency hammer 2 from the mounting clamps 11 solved. By opening the seal 21 also works the transparent protective cap 8th on and the electric cable 6 will be released. By pulling on the emergency hammer 2 wraps the electrical cable 6 from the cross 7 from. Because the electrical cable 6 has a length of about 1.5 m, it is possible the emergency hammer 2 to use as intended, without damaging the cable. After one use, it may be back on the cross 7 wound up and under the cap 8th be stowed.

By the electric cable 6 is the emergency hammer 2 mechanically protected against theft, as electrical cables have a high tensile strength. Will the cable 6 on the other hand cut with a knife or side cutter, from the hammer holder 3 torn out or damaged in any other way, then there is additional protection because of the speaker 9 switched on and an acoustic alarm signal is emitted. In addition, results from the transparent cap 8th and the cable visible underneath 6 as well as through the speaker 9 a deterrent effect.

The housing also has a light emitting diode 10 provided, which indicates the battery status of the alarm device by lighting up when the battery voltage is too low.

2 shows the schematic structure of the alarm device 28 as a circuit diagram. The alarm device 28 has a circuit arrangement 16 on, by a button battery as a power source 17 is fed. The circuit arrangement 16 is by means of a two-wire, electrical cable 6 with the emergency hammer 2 connected, wherein a closed circuit is formed. By a high-impedance terminating resistor 19 in an emergency hammer 2 only small currents and the button battery flow 17 is charged only slightly. The circuit arrangement 16 constantly measures the resistance 19 of the cable 6 , The operating point of the circuit arrangement 16 is set so that no alarm signal is triggered if the resistance remains the same. But will the cable 6 severed or short-circuited by damage, then resistance and current flow in the circuit change. The circuit arrangement 16 measure this and then switch over a line 18 a tone generator 27 one. This will cause an audible alarm signal through the speaker 9 issued.

The power source or the button battery 17 is also equipped with an LED control 15 connected. Drop the voltage of the button battery 17 below a defined value, the LED lights up, indicating that the battery has changed 17 must become.

The circuits 15 . 16 and 18 can be realized by a single chip.

1

arrangement

2

nothammer

3

hammer holder

4

hammerhead

5

Hammerspitze

6

electrical electric wire

7

Aufwickelkreuz

8th

transparent protective cap

9

speaker

10

led

11

mounting clamp

12

screw

14

cable opening

15

LED control circuit

16

circuitry

17

button battery

18

management

19

resistance

20

casing

21

seal

25

hammer handle

26

hanger

27

tone

28

alarm device

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0696528 A1 [0002]

Claims (7)

Arrangement of an emergency hammer ( 2 ) and a hammer holder ( 3 ), characterized in that the hammer holder ( 3 ) via a connecting means ( 6 ) with the emergency hammer ( 2 ) and an alarm device ( 28 ) which is arranged to trigger an alarm signal when the connection between the hammer holder ( 3 ) and the emergency hammer ( 2 ) via the connecting means ( 6 ) is separated or damaged. Device according to claim 1, characterized in that the connecting means ( 6 ), in particular two-core, electrical cable. Device according to claim 1 or claim 2, characterized in that the alarm device ( 28 ) an electronic circuit arrangement ( 16 ), which is set up, the alarm signal when a change in the resistance ( 19 ) or current flow in the electrical cable ( 6 ). Device according to one of the preceding claims, characterized in that for the alarm device ( 28 ) an acoustic signal generator is provided, preferably a piezo loudspeaker ( 9 ) with a tone generator ( 27 ). Device according to one of the preceding claims, characterized in that the hammer holder ( 3 ) a transparent protective cap ( 8th ) for receiving and covering the connecting means ( 6 ) having. Device according to one of the preceding claims, characterized in that for the connecting means ( 6 ) a take-up element is provided, preferably a take-up ( 7 ). Device according to one of the preceding claims, characterized in that the hammer holder ( 3 ) a display element, in particular a light-emitting diode ( 10 ), to check the status of a power supply ( 17 ) of the alarm device ( 28 ).