DE8812602U1 - Lighting system for bicycles - Google Patents

Description

Description ;

The invention relates to a bicycle with a lighting system comprising a generator with at least one generator coil as well as at least one permanent magnet, a battery and a headlight.

Bicycle lighting systems are known to be prone to failure. In particular, the design of a lighting system with a dynamo attached to the frame or front wheel fork, which has been known in principle for decades, is not reliable in certain weather conditions due to the frictional connection between the dynamo's friction wheel and the rear or front wheel that is necessary to drive the dynamo.

* This is why attempts have been made time and again to replace the friction-wheel-driven dynamo with a reliable power generator. However, these new designs were usually accompanied by other disadvantages, such as increased complexity of the structure, which ultimately led to a significant cost disadvantage compared to the lighting system equipped with the classic dynamo.

The invention is therefore based on the object of proposing a lighting system that enables safe operation independent of weather influences, while at the same time being characterized by a simple structure.

To achieve this object, the lighting system according to the invention is characterized in that the generator coil (η) and the accumulator are firmly connected to the frame and the permanent magnet(s) are connected to a wheel of the bicycle.

The permanent magnets moving past the generator coils induce an alternating voltage which, after rectification, is used to operate the consumers installed in the lighting system (light bulbs). There is an air gap between the rotating permanent magnets and the stationary generator coils. Accordingly, in contrast to previously known lighting systems, there are no parts here that are subject to mechanical wear in order to generate electrical energy or whose function is dependent on weather-related surface properties, as is the case with a dynamo/tire friction pairing, for example . According to an advantageous embodiment of the invention, the generator coils are attached to the mudguard of the wheel provided with the permanent magnets.

An advantageous embodiment of the invention is thereby

characterized in that the generator coils and the accumulator are components of the headlight. This enables a particularly compact design.

Advantageously, the permanent magnets are arranged on a common carrier which is an integral part of the front wheel, in particular is inserted into the bicycle cover of the front wheel.

According to an advantageous embodiment, this carrier forms together with the permanent magnets a magnetic strip, which is guided over the front wheel.

divided permanent magnets have the same center distance as the pole shoes of the iron core of the generator coils.

In a further advantageous embodiment, the bicycle cover itself is the carrier for the permanent magnets, such that the permanent magnets are an integral part of the bicycle cover.

Advantageously, the headlight is firmly connected to a mudguard, in particular to the mudguard of the front wheel, in such a way that the headlight

The accumulator, which is equipped with a charging and control device, as well as the connected consumers, in particular a headlight bulb and a taillight bulb, are electrically connected in parallel with the generator for the puffer lamp drive. This ensures that the lighting intensity is independent of the speed of the front wheel and is therefore constant, and that the accumulator is always fully charged: so that the full battery capacity is always available for lighting, even when the front wheel is stationary.

* According to a further advantageous embodiment of the invention, the generator is connected to a tachometer or the like.

An embodiment of the lighting system according to the invention is explained in more detail below using the drawings. It shows:

Fig. ■ 1 a lighting system mounted in the front wheel area of a bicycle,

Fig. 2 shows a circuit diagram for the lighting system according to Fig. 1.

The lighting system installed in the area of a front wheel 10 of a bicycle is shown in Fig. 1. The lighting system is essentially made up of a headlight 11 with a headlight housing 12 in which the other voltage-carrying components of the lighting system are arranged in addition to generator coils 13, 14. These are essentially a battery 15 with a charging and control device 16, a headlight bulb 17 and an operating switch 18. The headlight housing 12 is connected in one piece to a mudguard 20 attached to the front wheel fork 19.

To induce the voltage in the generator coils 13, 14, permanent magnets 21 with alternating polarity are mounted on the inside of the tread of a tire cover 22 of the front wheel 10. The permanent magnets 21 are located on a carrier 23, which together with the permanent magnets 21 forms a magnetic strip 24 that is inserted between a bicycle tube 25 and the tire cover 22, in such a way that the permanent magnets 21 are above the

3& entire circumference of the tire cover 22 are arranged at a constant center distance from each other, which corresponds to the center distance of the pole shoes of the generator coils 13, 14.

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If, as a result of the rotation of the front wheel 10, the permanent magnets 21 are moved past the generator coils 13, 14, which are arranged directly on the plastic mudguard 20, then - in accordance with the known physical phenomenon - an electrical voltage is induced in the generator coils 13, 14 depending on the speed of the front wheel 10. Of course, It should be noted that an air gap 26, which is essentially determined by the clear distance between the mudguard 20 and the tire cover 22, does not exceed a certain dimension; this dimension is of course dependent on the magnitude of the magnetic field strength of the individual case. used permanent magnets 21.

The circuit diagram of the lighting system is shown in Fig. 2. The permanent magnets 21 form with the generator coils 13, 14 a generator 27, which generates an alternating voltage generated. In a subsequent rectifier bridge 28, the alternating voltage is converted into a direct voltage and smoothed by a capacitor 29 connected in parallel. The accumulator 15 and the consumers (headlight bulb 17 and taillight bulb 30) are pa connected in parallel to the generator 27. The charging process of the accumulator 15 as well as the discharging is monitored by an IC module 31 of conventional type for voltage and current limitation and a relay 32 that switches in the event of undervoltage. The IC module 31 and the relay 32 form samme&eegr; the charging and control device 16.

Depending on the switch position of the operating switch 18, two operating states of the lighting system can be distinguished. Up to the off position of the operating switch 18 shown in the circuit diagram in Fig. 1, the accumulator 15 is charged when the generator 27 is driven. The IC component 31 forms an overcharge protection so that an overload

that of the accumulator 15 is impossible. When the operating switch 18 is in the on position indicated by a dashed line, the consumers (headlight bulb 17, tail light bulb 30) and the accumulator are 15 ° parallel to the generator 27, so that the lighting system is operated in buffer mode. This means that at the same time as the accumulator 15 is charging, the consumers (headlight bulb 17, tail light bulb 30) are supplied with voltage. As soon as the accumulator

¹ ^ 15 is in a charged state, the voltage supply to the consumers (headlight bulb 17, tail light bulb 30) is via this. The relay 32 is intended to prevent the battery 15 from becoming deeply discharged.

When the front wheel 10 is stationary, with a capacity of 0.5 Ah of the charged accumulator 15, the operating time is one hour if the power consumption of the consumers (headlight bulb 17, rear light bulb 30) is 3 W at a direct voltage value of 6 V. This ensures that the lighting system is ready for operation for a sufficiently long time even if the speed of the front wheel 10 is not sufficient to generate the required voltage of 6 V in the generator 27.

The voltage generated by the generator 27 to operate the lighting system can of course also be used to connect other consumers, such as a speedometer. This can be done using a connection terminal 33 shown in Fig. 1 - which is also used to connect the rear light bulb 30.

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Applicant;

Georg Fröhlich Butjadinger Street

2890 Nordenham 05.10.1988/9023 FHL-11-DE

List of reference symbols:

10 Front wheel

11 headlights

12 Headlight housing

13 Generator coil

14 Generator coil

15 Accumulator

16 Charging and control device

17 Headlight bulb

18 Operating switch

19 Front fork

20 mudguard

21 Permanent magnet

22 Tire cover

23 carriers

24 Magnetic tape

25 bicycle tube

26 Air gap

27 Generator

28 Rectifier bridge

29 Capacitor

30 tail light bulb

31 IC-Eustein

32 relays

33 Terminal

Claims (9)

Claims s 1. Bicycle with a lighting system comprising a generator with at least one generator coil and at least one permanent magnet, an accumulator and a headlight, characterized in that the generator coil(s) (13, 14) and the accumulator (15) are firmly connected to the frame and the permanent magnet(s) (21) are connected to a wheel of the bicycle. 2. Bicycle according to claim 1, characterized in that the generator coils (13, 14) are attached to the mudguard of the wheel provided with the permanent magnets (21). -2- 3. Bicycle according to claim 1 or 2, characterized in that the generator coils (13, 14) and the accumulator (15) are components of the headlight (11). 4. Bicycle according to claim 1, characterized in that the permanent magnets (21) are arranged on a common carrier (23) which is an integral part of the wheel (front wheel 10), in particular is inserted into a tire cover (22) of the front wheel (10). 10 5. Bicycle according to claim 4 and one or more of the further claims, characterized in that the carrier (23) together with the permanent magnets (21) forms a magnetic band (24), whereby the evenly distributed in the tire cover (22) of the front wheel (10) distributed over the circumference of the permanent magnets (21) have the same center distance as the pole shoes of the iron core of the generator coils (13, 14). 6. Bicycle according to claim 4 and one or more of the further claims, characterized in that the tire cover (22) itself is the carrier for the permanent magnets (21), such that the permanent magnets (21) are integral components of the tire cover (22). 25 7. Bicycle according to claim 1 and one or more of the further claims, characterized in that the headlight (11) is firmly connected to a mudguard, in particular to the mudguard (20) of the front wheel (10). is preferably an integral part of the mudguard (20). 8. Bicycle according to claim 1 and one or more of the further claims, characterized in that the a battery (15) provided with a charging and control device (16) and the connected consumers, in particular a headlight bulb (17) and/or a rear light -3- bulb (30), for buffer operation with the generator (27) are electrically connected in parallel" 9. Bicycle according to claim 1 and one or more of the further claims, characterized in that the generator (27) is connected to a speedometer or the like.