DE102005007414A1 - Brake light device for manually-operated bicycle brake, has switch closed by moving brake cable of brake mechanics, where relative movement between switch and magnet changes mutual position of mechanics such that switch is opened - Google Patents

Abstract

The device has a power source (Q) and a brake light that is attached to the power source by a brake light switch (S) and illuminates with a closed brake light switch. The switch is closed by moving a brake cable (3) of a brake mechanics. The relative movement between the switch and a magnet caused by the operation of the mechanics changes the mutual position of the mechanics such that the switch is opened.

Description

Technical area:

The The invention relates to a brake light device for a means a brake mechanism operable Bicycle brake of a bicycle.

From the DE 44 46 098 C2 is a distance warning system for bicycles known which emits a light signal when braking the bicycle. This is triggered by an acceleration sensor, which detects the deceleration process based on the associated negative acceleration. This system is only partially suitable for a function as a brake light, since the light signal is output only during braking, but not when the bicycle is stationary. Furthermore, the acceleration sensor of this system is expensive, which is detrimental not only to the manufacturing cost, but also to the risk of theft. In addition, the wiring effort for this system is relatively large, not least because of the need to provide a supply voltage for the acceleration sensor. Since, moreover, the acceleration sensor must be fastened in a directionally stable position relative to the bicycle, the mechanical outlay for this system is not insignificant either.

Technical task:

Of the The invention is therefore based on the object, a brake light device for one To provide a bicycle brake, which does not have these disadvantages.

These The object is achieved by a brake light device for an operable by means of a brake mechanism, in particular manually actuated, Bicycle brake of a bicycle, characterized in that the Brake light device has a power source and a brake light, which over a brake light switch is connected to the power source and lights on with the brake light switch closed, with the brake light switch when not actuated Brake mechanism open and by pressing the brake mechanism can be closed is. The bicycle brake can be operated in particular manually, so be a handbrake.

According to one preferred variant is the brake light switch by deflecting a brake cable closable, which is part of the brake mechanism and operated brake mechanism is deflected from a rest position. The minimum deflection is preferred of the brake cable, which is used to close the brake light switch is required, adjustable by means of an adjusting device.

According to one preferred variant of the invention is the brake light device according to the invention can be fitted on a bicycle or retrofittable.

According to one Another variant of the invention is the brake light switch as a reed switch or as Reed relay designed and respond to the magnetic field of a magnet able, where by pressing the brake mechanism, a relative movement between the brake light switch and the magnet is caused by which the mutual Location of the same changed so that the brake light switch on actuated Brake mechanism closed and opened with unactuated brake mechanism. The magnet is preferably a permanent magnet.

According to one Another variant of the invention, the magnet is coupled for movement connected to the brake mechanism and the brake light switch rigid or adjustably arranged on the bicycle, or vice versa.

Of the Distance between magnet and brake light switch can by means of a Adjustment mechanism, in particular adjusting spindle, be adjustable. The magnet or the brake light switch can by means of the adjustment mechanism be adjustably arranged on the bicycle.

According to one Another variant of the invention is either the magnet or the Brake light switch motion coupled to the brake cable, so that either the magnet or the brake light switch at the deflection the brake cable participates.

According to one Another variant of the invention is the magnet or the brake light switch movably coupled to a handbrake handle or brake lever, which is part of the brake mechanism and operated brake mechanism is deflected from a rest position, so that the magnet or the Brake light switch on the deflection of the handbrake handle or brake lever participates.

According to a further variant of the invention, the brake light device has an auxiliary brake light switch, which is connected in parallel to the brake light switch, wherein the bicycle has an additional brake operable by means of an additional brake and the auxiliary brake light switch is opened when the auxiliary brake mechanism is not actuated and can be closed by operating the auxiliary brake mechanism. For example, the driving wheel brake on the front wheel of the bicycle and the additional brake on the rear wheel act; According to the invention is activated by pressing each of these two brakes alone by a separate brake light switch one and the same brake light. According to a further variant, only a single brake light switch is present, which can be closed both by pressing the bicycle brake and by pressing the auxiliary brake.

• – eine Seilhülle, innerhalb welcher das Bremsseil über einen Teil seiner Länge nach Art eines Bowdenzugs geführt ist und welche einen der Fahrradbremse funktionsmäßig zugewandten Teil des Bremsseils freiläßt,
• – ein erstes Anschlagelement mit einer ersten Bohrung, welches so über das Bremsseil geschoben ist, dass das Bremsseil durch die erste Bohrung durchgeführt ist, wobei das der Fahrradbremse funktionsmäßig zugewandte Ende der Seilhülle als einseitiger Anschlag gegen eine Verschiebung des ersten Anschlagelements gegenüber dem Bremsseil in Richtung der Seilhülle fungiert,
• – eine Zusatzseilhülle, innerhalb welcher das Bremsseil ebenfalls über einen Teil seiner Länge nach Art eines Bowdenzugs geführt ist und welche einen von der Fahrradbremse funktionsmäßig abgewandten Teil des Bremsseils freiläßt,
• – ein zweites Anschlagelement mit einer zweiten Bohrung, welches so über das Bremsseil geschoben ist, dass das Bremsseil durch die zweite Bohrung durchgeführt ist, wobei das vom der Fahrradbremse funktionsmäßig abgewandte Ende der Zusatzseilhülle dem der Fahrradbremse funktionsmäßig zugewandten Ende der Seilhülle in einem Abstand gegenüberliegt und als einseitiger Anschlag gegen einer Verschiebung des zweiten Anschlagelements gegenüber dem Bremsseil in Richtung der Zusatzseilhülle fungiert,
• – ein Abstandshalter, welcher zwischen dem ersten und dem zweiten Anschlagelement angeordnet ist und als Anschlag gegen eine Verringerung des gegenseitigen Abstandes derselben fungiert.

According to a variant, the brake light device has the following further components:

• A cable sheath within which the brake cable is guided over a part of its length in the manner of a Bowden cable and which releases a part of the brake cable which faces the bicycle brake functionally,
• - A first stop member having a first bore, which is pushed over the brake cable, that the brake cable is performed through the first bore, wherein the bicycle brake operatively facing end of the cable sheath as a one-sided stop against displacement of the first stop member relative to the brake cable in the direction the cable sheath acts,
• - An additional cable sheath, within which the brake cable is also guided over part of its length in the manner of a Bowden cable and which releases a functionally remote from the bicycle brake part of the brake cable,
• A second stop member having a second bore which is slid over the brake cable such that the brake cable is passed through the second bore, the end of the supplemental cable sheath facing away from the bicycle brake being at a distance opposite the end of the cable sheath operatively facing the bicycle brake; acts as a one-sided stop against a displacement of the second stop element relative to the brake cable in the direction of the additional cable sheath,
• - A spacer, which is arranged between the first and the second stop member and acts as a stop against a reduction of the mutual distance thereof.

• – einen gegenüber dem Bremsseil in dessen Längsrichtung verschiebbaren ersten Träger mit einem ersten Durchgang, wobei der erste Träger so über das Bremsseil geschoben ist, dass das Bremsseil durch den ersten Durchgang durchgeführt ist und das erste Anschlagelement oder das der Fahrradbremse funktionsmäßig zugewandte Ende der Seilhülle als einseitiger Anschlag gegen eine Verschiebung der ersten Trägers gegenüber dem Bremsseil in Richtung der Seilhülle fungiert, und
• – einen zweiten Träger mit einem zweiten Durchgang, wobei der zweite Träger so über das Bremsseil geschoben ist, dass das Bremsseil durch den zweiten Durchgang durchgeführt ist, und welcher mit dem Bremsseil fest verbundenen, so dass der zweite Träger durch Betätigen der Bremsmechanik wegen der hiermit verbundenen Auslenkung des Bremsseils aus der Ruhestellung unter Anspannung einer Rückstellfeder in Richtung des ersten Trägers verschoben wird,

wobei der Bremslichtschalter am ersten Träger und der Magnet am zweiten Träger angeordnet ist oder umgekehrt, und der Bremslichtschalter schließt, wenn der Abstand zwischen den Trägern einen Grenzwert unterschreitet, und öffnet, wenn dieser Abstand den Grenzwert wieder überschreitet.According to a variant, the brake light device has the following further components:

• - A relative to the brake cable in the longitudinal direction displaceable first carrier with a first passage, wherein the first carrier is pushed over the brake cable, that the brake cable is performed by the first passage and the first stop element or the bicycle brake functionally facing end of the cable sheath than one-sided stop acts against a displacement of the first carrier relative to the brake cable in the direction of the cable sheath, and
• A second carrier having a second passage, the second carrier being slid over the brake cable such that the brake cable is passed through the second passage and fixedly connected to the brake cable such that the second carrier is actuated by operating the brake mechanism for the herewith connected deflection of the brake cable is moved from the rest position under tension of a return spring in the direction of the first carrier,

wherein the brake light switch on the first carrier and the magnet on the second carrier is arranged or vice versa, and the brake light switch closes when the distance between the carriers falls below a threshold, and opens when this distance exceeds the limit again.

According to one preferred variant, the spacer is designed as a spacer sleeve, these being one in their longitudinal direction extending lateral slot, the brake cable in the axial Direction through the spacer sleeve passes through, the first and the second carrier each partially disposed in the interior of the spacer sleeve and in each case by the slot through to the outside the spacer sleeve protrude, and both the brake light switch and the magnet outside the spacer sleeve are arranged.

• – eine Seilhülle, innerhalb welcher das Bremsseil über einen Teil seiner Länge nach Art eines Bowdenzugs geführt ist und welche einen der Fahrradbremse funktionsmäßig zugewandten Teil oder Endbereich des Bremsseils freiläßt,
• – einen gegenüber dem Bremsseil in dessen Längsrichtung verschiebbaren ersten Träger mit einem ersten Durchgang, welcher so über das Bremsseil geschoben ist, dass das Bremsseil durch den ersten Durchgang durchgeführt ist und das der Fahrradbremse funktionsmäßig zugewandte Ende der Seilhülle als einseitiger Anschlag gegen eine Verschiebung der ersten Trägers gegenüber dem Bremsseil in Richtung der Seilhülle fungiert, und
• – einen zweiten Träger mit einem zweiten Durchgang, welcher so über das Bremsseil geschoben ist, dass das Bremsseil durch den zweiten Durchgang durchgeführt ist, und welcher mit dem Bremsseil fest verbundenen, so dass der zweite Träger durch Betätigen der Bremsmechanik wegen der hiermit verbundenen Auslenkung des Bremsseils aus der Ruhestellung unter Anspannung einer Rückstellfeder in Richtung des ersten Trägers verschoben wird,

wobei der Bremslichtschalter am ersten Träger und der Magnet am zweiten Träger angeordnet ist oder umgekehrt, und der Bremslichtschalter schließt, wenn der Abstand zwischen den Trägern einen Grenzwert unterschreitet, und öffnet, wenn dieser Abstand den Grenzwert wieder überschreitet.According to a variant, the brake light device has the following further components:

• A cable sheath within which the brake cable is guided over a part of its length in the manner of a Bowden cable and which releases a part or end region of the brake cable which faces the bicycle brake functionally,
• - A relative to the brake cable in the longitudinal direction displaceable first carrier with a first passage, which is pushed over the brake cable, that the brake cable is performed by the first passage and the bicycle brake operatively facing end of the cable sheath as a one-sided stop against displacement of the first Support acts against the brake cable in the direction of the cable sheath, and
• A second carrier having a second passage which is slid over the brake cable such that the brake cable is passed through the second passage and which is fixedly connected to the brake cable such that the second carrier is actuated by operating the brake mechanism because of the associated deflection of the brake cable Brake cable is moved from the rest position under tension of a return spring in the direction of the first carrier,

wherein the brake light switch on the first carrier and the magnet on the second carrier is arranged or vice versa, and the brake light switch closes when the distance between the carriers falls below a limit, and opens when this distance exceeds the limit again.

According to one Variant of the brake light device is on the first carrier spaced from the brake cable first slider rigidly arranged, which the first carrier surmounted parallel to the brake cable, being on the second carrier a likewise spaced from the brake cable second slider rigid is arranged, which also the second carrier parallel to Brake cable towers over and wherein the first and second sliders telescopically inserted are.

• – der zweite Träger als eine zweite Doppelhülse ausgebildet ist, welche einen zu dem zweiten Durchgang parallelen zweiten Zusatzdurchgang besitzt, mit welchem das zweite Gleitstück fluchtet,
• – der gegenseitige Abstand der Mittelachsen des ersten Durchgangs und des ersten Zusatzdurchgangs derselbe ist wie der gegenseitige Abstand der Mittelachsen des zweiten Durchgangs und des zweiten Zusatzdurchgangs, und
• – mindestens ein Teil der Justierspindel entweder im ersten oder im zweiten Zusatzdurchgang angeordnet ist.

According to a variant of the first carrier is formed as a first double-sleeve, which has a first auxiliary passage parallel to the first passage, with which the first slider is aligned, wherein

• - The second carrier is formed as a second double-sleeve, which has a second passage parallel to the second passage, with which the second slider is aligned,
• The mutual distance of the central axes of the first passage and the first auxiliary passage is the same as the mutual distance of the central axes of the second passage and the second auxiliary passage, and
• - At least a portion of the adjusting spindle is arranged either in the first or in the second additional passage.

According to one Variant is on the first double sleeve further a first cable tube rigidly arranged, which is aligned with each of the first passage, wherein the brake cable is passed through the first cable tube, on the second double sleeve further a second cable tube is arranged rigidly, which with each of the second passage is aligned, the brake cable also through the second Rope tube is performed, and the first and second conduit also telescopically in one another are pushed in, so that the first and the second double sleeve sliding in the brake cable direction are mutually displaceable.

According to one preferred variant, the magnet is at least partially inside of the first slider and the brake light switch at least partially inside the second slide arranged, or vice versa.

• – eine Seilhülle, innerhalb welcher das Bremsseil über einen Teil seiner Länge nach Art eines Bowdenzugs geführt ist und welche einen der Fahrradbremse zugewandten Teil oder Endbereich des Bremsseils (3) freiläßt,
• – eine erste Doppelhülse, welche zwei parallele Durchgänge besitzt, wobei – ein erstes Seilrohr sowie ein erstes Gleitstück jeweils an der ersten Doppelhülse starr angeordnet sind und mit jeweils einem der beiden parallelen Durchgänge der ersten Doppelhülse fluchten, – diese so über das Bremsseil geschoben ist, dass das Bremsseil durch einen dieser Durchgänge und das erste Seilrohr durchgeführt ist, und – das der Fahrradbremse funktionsmäßig zugewandte Ende der Seilhülle als einseitiger Anschlag gegen eine Verschiebung der ersten Doppelhülle gegenüber dem Bremsseil in Richtung der Seilhülle fungiert,
• – eine zweite Doppelhülse, welche ebenfalls zwei parallele Durchgänge besitzt, deren Mittelachsen denselben gegenseitigen Abstand aufweisen wie die Mittelachsen der beiden Durchgänge der ersten Doppelhülse, wobei – ein zweites Seilrohr sowie ein zweites Gleitstück jeweils starr an der zweiten Doppelhülse angeordnet sind und mit jeweils einem der beiden parallelen Durchgänge der zweiten Doppelhülse fluchten, – diese so über das Bremsseil geschoben ist, dass das Bremsseil durch einen dieser Durchgänge und das zweite Seilrohr durchgeführt ist, das erste und das zweite Seilrohr teleskopartig ineinander eingeschoben sind und ebenso das erste und das zweite Gleitstück teleskopartig ineinander eingeschoben sind, so dass die erste und die zweite Doppelhülle in Bremsseilrichtung gleitend gegeneinander verschiebbar sind, – die zweite Doppelhülse fest mit dem Bremsseil verbunden ist, so dass diese bei einer Verschiebung der ersten Doppelhülle gegenüber dem Bremsseil in Richtung der zweiten Doppelhülse als Anschlag fungiert und durch Betätigen der Bremsmechanik wegen der hiermit verbundene Auslenkung des Bremsseils aus der Ruhestellung unter Anspannung einer Rückstellfeder in Richtung der ersten Doppelhülse verschoben wird, die zweite Doppelhülse fest mit dem Bremsseil verbunden ist, so dass diese als Anschlag gegen einer Verschiebung der ersten Doppelhülle gegenüber dem Bremsseil in Richtung der zweiten Doppelhülse fungiert und durch Betätigen der Bremsmechanik wegen der hiermit verbundene Auslenkung des Bremsseils aus der Ruhestellung unter Anspannung einer Rückstellfeder in Richtung der ersten Doppelhülse verschoben wird,

wobei der Bremslichtschalter schließt, wenn der Abstand zwischen den Doppelhülsen einen Grenzwert unterschreitet, und öffnet, wenn dieser Abstand den Grenzwert wieder überschreitet.According to a preferred variant of the invention, the brake light device has the following further components:

• - A cable sheath, within which the brake cable is guided over a part of its length in the manner of a Bowden cable and which the bicycle brake facing part or end portion of the brake cable ( 3 ),
• A first double sleeve which has two parallel passages, wherein a first cable tube and a first slide are each rigidly arranged on the first double sleeve and aligned with one of the two parallel passages of the first double sleeve, this is pushed over the brake cable, that the brake cable is passed through one of these passages and the first cable tube, and - that the bicycle brake functionally facing end of the cable sheath acts as a one-sided stop against a displacement of the first double hull relative to the brake cable in the direction of the cable sheath,
• - A second double sleeve, which also has two parallel passages, whose central axes have the same mutual distance as the central axes of the two passages of the first double sleeve, wherein - a second cable tube and a second slider are each rigidly arranged on the second double sleeve and with one of the two parallel passages of the second double sleeve are aligned, - this is pushed over the brake cable, that the brake cable is performed by one of these passages and the second cable tube, the first and second cable tube are telescopically inserted into each other and also the first and the second slider telescopically are pushed into one another, so that the first and the second double hull in the direction of brake cable are slidable against each other, - the second double-sleeve is firmly connected to the brake cable, so that this with a displacement of the first double hull against the brake cable in Ric tion of the second double-sleeve acts as a stop and is moved by pressing the brake mechanism because of the associated deflection of the brake cable from the rest position under tension of a return spring in the direction of the first double sleeve, the second double sleeve is firmly connected to the brake cable, so that it as a stop against a displacement of the first double sheath relative to the brake cable acts in the direction of the second double sleeve and is displaced by operating the brake mechanism because of the associated deflection of the brake cable from the rest position under tension of a return spring in the direction of the first double sleeve,

wherein the brake light switch closes when the distance between the double sleeves falls below a limit, and opens when this distance exceeds the limit again.

In training the brake light switch as Reed switch here is preferably the brake light switch on the first carrier and the magnet arranged on the second carrier or vice versa, the brake light switch closes when the distance between the carriers falls below a limit, and opens when this distance exceeds the limit again.

Prefers ends the cable sheath in the counter-holder of a handbrake handle or brake lever, wherein the Brake cable moves in the handbrake handle or brake lever ends.

According to one Another variant of the invention is the magnet on or in the first Slider and the reed switch or the reed relay is arranged on or in the second slider so or conversely, the magnet on or in the second slider and the Reed switch or the reed relay on or in the first slider so arranged that the distance between magnet and reed switch or reed relay with unconfirmed brake mechanism bigger and when pressed Brake mechanism is smaller than the limit value.

According to one Another variant of the invention is the magnet by means of the adjusting spindle arranged in the direction of the brake cable adjustable in or on the first slider.

The Current source Q may be e.g. as a battery, as an accumulator or as a dynamo be educated.

Summary of the drawing, in which show by way of example and schematically:

1 a very simple embodiment of a brake light device according to the invention,

2 a part of the components of another embodiment of a brake light device according to the invention,

3 a complete, arranged on a brake cable brake light device according to the invention including the components of 2 with unactuated brake mechanism,

4 the brake light device of 3 with activated brake mechanism,

5 a further embodiment of a arranged on a brake cable brake light device according to the invention with unconfirmed brake mechanism,

6 the brake light device of 5 with activated brake mechanism,

7 a cross section through the brake light device of 5 at the level of the line AA and perpendicular to the plane of 5 , and

8th a cross section through the brake light device of 5 at the level of the line BB and perpendicular to the plane of 5 ,

In the 2 to 6 Some components are partially transparent to reveal the underlying other components.

The illustrated with reference to the figures preferred embodiment of a brake light device according to the invention for an actuatable by means of a brake mechanism bicycle handbrake is for equipment or retrofitting to a brake cable 3 provided, which is part of the brake mechanism of the bicycle handbrake and is deflected when the brake mechanism from a rest position, wherein the brake light switch S by deflecting the brake cable 3 is closable.

1 shows the following components of such a brake light device according to the invention: a permanent magnet M, designed as a reed switch S brake light switch S, a current source Q, a brake light L and lines 20 . 21 . 22 ,

The brake light device for an actuatable by means of a brake mechanism, in particular manually operable, bicycle brake of a bicycle of 1 has the power source Q and the brake light L, which via the reed switch S and the lines 20 . 21 . 22 is connected to the power source Q and lights when the reed switch S is closed, which is open when not actuated brake mechanism and can be closed by pressing the brake mechanism.

The brake light device of 1 is on a brake cable 3 a handbrake of a bicycle retrofitted, so that the brake cable 3 Part of the brake mechanism is deflected and actuated brake mechanism from a rest position, wherein the brake light switch S by deflecting the brake cable 3 is closable.

The brake light switch S is designed as a reed switch S and responsive to the magnetic field of a magnet M capable of, by actuating the brake mechanism, a relative movement between the brake light switch S and the magnet M is caused by which the mutual position of the same changed so that the Brake light switch S is closed when the brake mechanism is actuated and when the brake mechanism is not activated is open. The brake light L therefore lights up when the brake mechanism is actuated.

Here, the magnet M is motion-coupled with the brake cable 3 connected, for example, soldered on this, so that the magnet M on actuation of the brake mechanism at the deflection of the brake cable 3 in the direction of the brake light switch S participates, and the brake light switch S is rigidly arranged on the frame R of the bicycle, for example glued.

The brake cable 3 is over a part of its length after a Bowden cable within a cable sheath 4 guided, which one of the bicycle brake facing part or end portion of the brake cable 3 leaves free and is fixed by means of a clamp Sch at the bicycle frame R. The rope cover 4 ends in the anvil of a handbrake handle or brake lever (not shown), the brake cable 3 movably in the handbrake handle or brake lever ends.

The execution the brake light switch as a reed switch S and its operation with ensure the magnet M. a non-contact Operation of the brake light switch, long life and great resistance Against pollution.

The reed switch S and the magnet M can, if the bicycle brake is a shoe brake, for example, be arranged in close proximity to the brake shoes. The attachment of the magnet M or reed switch S on the brake cable 3 does not affect the braking effect. By the invention, the brake light function is met very reliable.

2 shows the following components of another preferred embodiment of a brake light device according to the invention: a first double sleeve 1 , a first cable tube 5 , a first slider 6 , a holder 9 , an adjusting spindle 10 , the permanent magnet M, a second double sleeve 2 , a second cable tube 7 , a second slider 8th , designed as a reed switch S brake light switch S, the power source Q, the brake light L and the lines 20 . 21 . 22 ,

The first double sleeve 1 has two parallel cylindrical passages D1a and D1b, which are each formed as a through hole. The first cable tube 5 , which is rigidly received in the through hole D1a and aligned with this is on one side over the first double sleeve 1 above. The first slider 6 , which is designed as a tube, is rigidly received in the through hole D1b, aligned with this, stands over the first double sleeve 1 in the same direction as the first cable tube 5 one-sided over and has in his the first double sleeve 1 facing end an internal thread on. Inside the first slider 6 is the holder 9 received, which at one end portion rigidly or by magnetic force with the permanent magnet M and at its other end portion rigidly with the adjusting spindle 10 is connected, wherein the adjusting spindle 10 with the internal thread of the first slider 6 is screwed and the permanent magnet M im from the first double sleeve 1 remote end portion of the first slider 6 located. The first cable tube 5 is preferably exchangeably received in the through hole D1a.

The second double sleeve 2 Also has two parallel cylindrical passages D2a and D2b, which are also each formed as a through hole. The central axes of the two passages D2a, D2b have the same mutual distance as the center axes of the two passages D1a, D1b of the first double-sleeve 1 , The second cable tube 7 , which is rigidly received in the through hole D2a and aligned with this, is clamped or pressed by means of a fixing screw K1 and stands on one side over the second double sleeve 2 above. The second slider 8th , which is also formed as a tube, is rigid or by magnetic force in the through hole D2b recorded or pressed, aligned with this, is clamped by means of a fixing screw K2 and is on both sides on the second double sleeve 2 above. In that end region of the second slider 8th , which of the second double-sleeve 2 facing away protruding part of the second cable tube, there is the reed switch S.

The second cable tube 7 is preferably exchangeable received in the through hole D2a. Likewise, the second slider 8th preferably exchangeably received in the through hole D2b.

The power source Q is via electrical wires 20 . 21 . 22 and connected via the reed switch S to the brake light L, so that it lights up when the reed switch is closed. The brake light L may be, for example, a light bulb or a super bright red light emitting diode.

The inner diameter of the first cable tube 5 is slightly larger than the outer diameter of the second cable tube 7 , Likewise, the inner diameter of the second slider 8th is slightly larger than the outer diameter of the first slider 6 so that the second cable tube 7 telescopically in the first cable conduit 5 and at the same time the first slider 6 telescopically in the second slider 8th are insertable.

3 shows a preferred embodiment of a complete, on the brake cable 3 arranged brake light device according to the invention including the components of 2 at unbe active brake mechanism of the bicycle brake. The brake cable 3 is part of the brake mechanics. In the in 3 the situation shown, the brake mechanism is not actuated, ie the brake cable 3 is in its rest position, which it occupies with unconfirmed brake mechanism, and the brake light L does not light up.

The brake cable 3 is over a part of its length after a Bowden cable of a cable sheath 4 enclosed, which one of the bicycle brake operatively facing part or end portion of the brake cable 3 leaves free. The brake cable 3 is thus within the cable sheath 4 over a part of its length in the manner of a Bowden cable.

The first double sleeve 1 is so over the brake cable 3 pushed that brake cable 3 through the passage D1a and the first cable conduit 5 is performed and the bicycle brake facing end 4a the cable sheath 4 as a one-sided stop against a displacement of the first double hull 1 opposite the brake cable 3 in the direction of the cable sheath 4 acts. The first double sleeve is thus against the the end 4a or against the local front side of the cable sheath 4 pushed. The first cable tube 5 as well as the first slider 6 stand in the from the end 4a opposite direction parallel to the brake cable 3 over the first double sleeve 1 above. The first rope sleeve 1 is not on the brake cable 3 clamped still connected in some other way with this rigid.

The second double sleeve 2 is so over the brake cable 3 pushed that brake cable 3 through the passage D2a and the second cable tube 8th is performed. The second cable tube 7 is telescopic in the first cable tube 5 and the first slider 6 telescopically in the second slider 8th pushed in, but only so deep that the first cable tube 5 not on the second double sleeve 2 and the second slider 8th not on the first double sleeve 1 strikes. That is, the maximum possible insertion depth is not used; rather, the second double sleeve 2 to be approximated by a certain travel further to the first double-sleeve than the in 3 represented position corresponds. This travel is at least as large as the deflection of the brake cable 3 from its rest position with fully actuated brake mechanism.

The first and the second double cover 1 . 2 are thus slidable against each other in Bremsseilrichtung slidably, wherein the cable tubes 5 . 7 and the sliders 6 . 8th as a guide to this.

The second double sleeve 2 is firmly on the brake cable 3 clamped so that no longitudinal displacement of the second double sleeve 2 opposite the brake cable 3 is possible. The second double sleeve 2 Therefore takes on every deflection of the brake cable 3 from its rest position part and acts in a shift of the first double hull 1 opposite the brake cable 3 in the direction of the first double sleeve 1 as a stop which the displacement of the second double sleeve 2 limited.

Between the two double sleeves 1 and 2 there is a preloaded return spring 11 whose tension is the mutual distance between the two double sleeves 1 . 2 is looking to enlarge. In this way, the first double sleeve 1 constantly against the end 4a the cable sheath 4 pressed and the brake cable 3 held under a certain tension.

The reed switch S closes when its distance from the permanent magnet M falls below a limit, and opens when this distance exceeds the limit again. Thus, the reed switch S closes if and only if the distance between the double sleeves 1 . 2 falls below a certain threshold, and then opens again when this distance exceeds the threshold again. The brake light L lights up as long as this distance is less than the threshold value.

The limit value or the threshold value can be adjusted by adjusting the adjusting spindle 10 to be changed. It is set so that the limit or threshold value when reaching a certain minimum deflection of the brake cable 3 from its rest position by pressing the brake mechanism below and at the transition of the brake cable 3 back to the rest position after falling below the minimum deflection is exceeded again. By adjusting the adjusting spindle 10 At the same time, the minimum deflection is also changed.

advantageously, lights the brake light according to the invention also then when the brake mechanism operated with the bicycle stationary becomes. Furthermore, the brake light function according to the invention is independent of the size of the braking delay; as well It does not matter if the braking is smooth or uneven.

According to a preferred variant, the cable sheath ends 4 in the counter-holder of a handbrake handle or brake lever and is thus against displacement in the longitudinal direction of the brake cable 3 locked, with the brake cable 3 movably in the handbrake handle or brake lever ends. According to another variant, the cable sheath 4 on the frame or the fork of the bicycle against displacement in the longitudinal direction of the brake cable 3 locked, with the brake cable 3 movably in the handbrake handle or brake lever ends.

The designed as a reed switch S brake light switch S is thus according to the invention not actuated brake mechanism opened and closed by pressing the brake mechanism.

4 shows the brake light device of 3 when actuated brake mechanism, ie when deflected from the rest position brake cable 3 , Because the second double sleeve 2 at each deflection of the brake cable 3 takes part, is the mutual distance between the double sleeves 1 and 2 across from 3 reduced. Accordingly, the second cable is 7 is opposite 2 deeper into the first cable tube 5 and the first slider 6 deeper into the second slider 8th inserted. The return spring (in 4 not shown) is therefore opposite 3 more compressed. The reed switch S is in 4 closed, since its distance from the permanent magnet M has fallen below the limit, so that the brake light L lights up.

5 shows a further embodiment of a arranged on a brake cable brake light device according to the invention with unconfirmed brake mechanism.

The brake cable 3 ' is over a part of its length after a Bowden cable of a cable sheath 4 ' enclosed, which one of the bicycle brake operatively facing part or end portion of the brake cable 3 ' leaves free. The brake cable 3 ' is part of the brake mechanics and is in the situation of 5 in a rest position, which it occupies with unconfirmed brake mechanism, and the brake light L does not light. As well as in 1 is the brake light L on the reed switch S and the lines 20 . 21 . 22 connected to the power source Q.

A first stop element 12 with a first hole 13 is so over the brake cable 3 ' pushed that brake cable 3 ' through the first hole 13 is carried out, wherein the bicycle brake functionally facing end 4a ' the cable sheath 4 ' as a one-sided stop against displacement of the first stop element 12 opposite the brake cable 3 ' in the direction of the cable sheath 4 ' acts. The rope cover 4 ' ends in the anvil of a handbrake handle or brake lever, not shown, in which the brake cable 3 ' movable ends.

The brake cable 3 ' is also in one of the cable sheath 4 ' spaced additional rope sheath 17 over a further part of its length guided in the manner of a Bowden cable, wherein the additional cable sheath 17 one of the bicycle brake functionally remote from the brake cable part 3 ' leaves free, with the function of the bicycle brake remote end 17a the additional rope cover 17 the bicycle brake functionally facing end 4a ' the cable sheath 4 ' at a distance opposite

A second stop element 14 with a second hole 15 is so over the brake cable 3 ' pushed that brake cable 3 through the second hole 15 is performed, wherein the function of the bicycle brake remote end 17a the additional rope cover 17 as a one-sided stop against displacement of the second stop element 14 opposite the brake cable 3 in the direction of the additional cable sheath 17 acts.

Between the first and the second stop element 12 . 14 is a distance sleeve acting as a spacer 16 arranged, which as a stop against a reduction of the mutual distance of the two stop elements 12 . 14 and therefore also the ends 4a ' . 17a the cable sheaths 4 ' . 17 acts.

The stop elements 12 . 14 are preferably designed as so-called pear nipples. The spacer sleeve 16 is preferably a cylindrical sleeve with a longitudinal slot extending in the lateral slot, the function of which will be explained below. The slot preferably extends over the full length of the spacer sleeve 16 in that it has a C-shaped cross-section over its entire length ( 7 . 8th ). The brake cable is axially through the spacer sleeve 16 carried out.

The stop elements 12 . 14 and the spacer sleeve 16 are thus capable of between the end 4a ' the cable sheath 4 ' and the end 17a the cable sheath 17 to transmit a compressive force, causing the cable sheath 17 behaves as if it were part of a continuous Bowden cable, consisting of the cable sheath 4 ' , the spacer sleeve 16 and the rope cover 17 , which ends in the counter-holder of the handbrake handle or brake lever, not shown.

The brake light device of 5 also has a first double sleeve 1' with a first passage D1a 'and a second passage D1b' parallel thereto, which thus passes over the brake cable 3 ' is pushed, that this is performed by the first passage D1a 'and the first stop element 12 as a one-sided stop against a displacement of the first double sleeve 1' opposite the brake cable 3 ' in the direction of the cable sheath 4 ' acts. The first double hull 1' is partly inside the spacer sleeve 16 is arranged and protrudes through the slot through to the outside of the spacer sleeve 16 , wherein the first passage D1a 'in the interior of the spacer sleeve 16 and the second passage D1b 'is outside thereof ( 7 ).

Furthermore, the brake light device of 5 a second double sleeve 2 ' with a first passage D2a 'and a second passage D2b' parallel thereto, which thus passes over the brake cable 3 ' pushed that through the passage D2a 'is performed. The second double sleeve 1' is by means of a fixing screw K2 'fixed to the brake cable 3 ' connected. Also the second double hull 2 ' is partly inside the spacer sleeve 16 is arranged and protrudes in the same direction as the first double sleeve 1' also through the slot through to the outside of the spacer sleeve 16 , wherein the passage D2a 'in the interior of the spacer sleeve 16 and the passage D2b 'is outside of it ( 8th ).

At the first double-sleeve is 1' is one of the brake cable 3 ' spaced first slider 6 ' rigidly arranged, which is the first double sleeve 1' parallel to the brake cable 3 in the direction of the second double sleeve 2 ' surmounted. At this is one of the brake cable 3 ' also spaced, in the passage D2b 'recorded and there by means of a Fixiersxhraube K2' fixed second slider 8th' rigidly arranged, which is the second double sleeve 2 ' on both sides parallel to the brake cable 3 surmounted. The first and the second slider 6 ' . 8th' are telescopically slidably inserted into each other. As a result, a mutual rotation of the two double sleeves 1' . 2 ' around the axle of the brake cable 3 ' prevented.

The passages D1b ', D2b' and the sliders 6 ' . 8th' they all curse each other.

The first and the second double cover 1' . 2 ' are thus slidable against each other in Bremsseilrichtung slidably, wherein the sliders 6 ' . 8th' as a guide to this.

Between the double sleeves 1' . 2 ' there is a return spring 11 ' which a repulsive force between the double sleeves 1' . 2 ' exerts, which is the first stop element 12 over the first double sleeve 1' towards the end 4a ' the first rope cover 4 ' presses and which upon actuation of the brake mechanism due to the associated deflection of the brake cable 3 ' from his rest position further strained, namely is compressed. The return spring 11 ' Preferably aligned with the risers 6 ' . 8th' ,

In the passage D1b 'is the adjusting spindle 10 received, which has an external thread by means of which it is screwed into a not shown internal thread of the passage D1b '. At the Justierspindel is rigid a bracket 9 arranged, which is the first double sleeve 1' inside the first slider 6 ' in the direction of the second double sleeve 2 ' surmounted and carries the magnet M.

Trained as a reed Komtakt brake light switch S is located inside the second slider 8th' in that both the brake light switch S and the magnet M are outside the spacer sleeve 16 are arranged.

In the situation of 5 is the distance between the magnet M and reed switch S so large that the reed switch S is still not responsive to the magnetic field of the magnet M and therefore is open. The light L therefore does not light up.

6 shows the brake light device of 5 with activated brake mechanism. The brake cable 3 ' is now deflected in the direction of the brake lever, not shown, from its rest position. Therefore, with the brake cable 3 ' Motion coupled second double sleeve 2 ' opposite to their position of 5 in the direction of the first double sleeve 1' shifted, the return spring 11 ' is opposite to the situation of 5 more compressed.

In the situation of 6 the distance between magnet M and reed switch S is opposite to the situation of 5 reduced so that the reed switch S is responsive to the magnetic field of the magnet M and therefore is closed. The light L therefore lights up. When the brake cable returns 3 ' in its rest position increases the distance of the double sleeves 1' . 2 ' under relaxation of the return spring 11 ' so far, until again the situation of 5 is achieved, wherein the return spring 11 ' the first double sleeve 1' still constantly against the first stop element 12 in the direction of the first cable sheath 4 ' keeps pressed.

Industrial Applicability:

The Invention is industrially applicable especially in the field of safety technology for Cycles.

D1a, D1b

Passages through 1

D1a ', D1b'

Passages through 1'

D2a D2b

Passages through 2

D2a ', D2b'

Passages through 2 '

K1, K1 ', K2, K2'

fixing screws

L

Stoplight

M

permanent magnet

Q

power source

R

bicycle frame

S

Brake Light Switch

Sch

clamp

1, 1'

first double sleeves

2, 2 '

second double sleeves

3, 3 '

brake cables

4, 4 '

cable housing

4a, 4a '

of the Bicycle brake functionally facing Ends of the

cable housing 4 . 4 '

5

first cable pipe

6 6 '

first sliders

7

second cable pipe

8th, 8th'

second sliders

9

bracket

10

adjusting spindle

11 11 '

Return springs

12 14

First, second spacer

13 15

first, second hole

16

Stand Off

17

Additional cable housing

17a '

from the bicycle brake functionally averted The End

the cable sheath 4 '

20 21, 22

electrical cables

Claims (23)

Brake light device for an actuatable by means of a brake mechanism, in particular manually operable, bicycle brake of a bicycle, characterized in that the brake light device comprises a current source (Q) and a brake light (L) which is connected via a brake light switch (S) to the power source (Q) and with the brake light switch (S) closed, the brake light switch (S) is opened when the brake mechanism is not actuated and can be closed by actuating the brake mechanism. Brake light device according to claim 1, characterized in that the brake light switch (S) by deflecting a brake cable ( 3 . 3 ' ) is closable, which is part of the brake mechanism and is deflected when actuated brake mechanism from a rest position. Brake light device according to claim 1 or 2, characterized characterized in that the brake light switch (S) as a reed switch (S) or designed as a reed relay and the magnetic field of a Magnets (M) is capable of, wherein by pressing the Brake mechanism a relative movement between the brake light switch (S) and the magnet (M) is caused by which the mutual position of the same changed so that the brake light switch (S) when pressed Brake mechanism closed and opened with unactuated brake mechanism. Brake light device according to claim 3, characterized in that the magnet (M) is coupled in a motion-coupled manner to the brake mechanism and the brake light switch (S) rigid or adjustable on the bike is arranged, or vice versa. Brake light device according to claim 2, characterized in that the minimum deflection of the brake cable ( 3 . 3 ' ), which is required for closing the brake light switch (S), by means of an adjusting device ( 10 ) is adjustable. Brake light device according to one of claims 3 to 5, characterized in that the distance between magnet (M) and brake light switch (S) by means of an adjusting mechanism ( 10 ), in particular adjusting spindle ( 10 ), is adjustable. Brake light device according to Claim 2 and one of Claims 3 to 6, characterized in that either the magnet (M) or the brake light switch (S) is coupled in a motion-coupled manner to the brake cable ( 3 . 3 ' ) is arranged so that either the magnet (M) or the brake light switch (S) at the deflection of the brake cable ( 3 . 3 ' ) participates. Brake light device according to one of claims 3 to 6, characterized in that the magnet (M) or the brake light switch (S) motion coupled to a handbrake handle or brake lever arranged is which part of the brake mechanism and when the brake mechanism is activated is deflected from a rest position, so that the magnet (M) or the brake light switch (S) on the deflection of the handbrake handle or brake lever participates. Brake light device according to one of claims 1 to 8, characterized in that the brake light device is an additional brake light switch which is connected in parallel with the brake light switch (S) is, wherein the bicycle operable by means of an additional brake mechanism Has additional brake and the auxiliary brake light switch at not actuated Additional brake mechanism open and by pressing the additional brake mechanism closable is. Brake light device according to claim 2 or 7, characterized in that the brake light device comprises the following further components: - a cable sheath ( 4 ' ) within which the brake cable ( 3 ' ) is performed over a part of its length in the manner of a Bowden cable and which a bicycle brake functionally facing part of the brake cable ( 3 ' ), - a first stop element ( 12 ) with a first bore ( 13 ), which so over the brake cable ( 3 ' ) is pushed, that the brake cable ( 3 ' ) through the first hole ( 13 ), wherein the end of the bicycle brake functionally facing ( 4a ' ) of the cable sheath ( 4 ' ) as a one-sided stop against displacement of the first stop element ( 12 ) opposite the brake cable ( 3 ' ) in the direction of the cable sheath ( 4 ' ), - an additional cable sheath ( 17 ) within which the brake cable ( 3 ' ) is also guided over part of its length in the manner of a Bowden cable and which is a functionally remote from the bicycle brake part of the brake cable ( 3 ' ), - a second stop element ( 14 ) with a second bore ( 15 ), which so over the brake cable ( 3 ' ) is pushed, that the brake cable ( 3 ) through the second bore ( 15 ), wherein the functionally remote from the bicycle brake end ( 17a ) of the additional cable sheath ( 17 ) the end of the bicycle brake functionally facing ( 4a ' ) of the cable sheath ( 4 ' ) at a distance and as a one-sided stop against a displacement of the second stop element ( 14 ) opposite the brake cable ( 3 ' ) in the direction of the additional cable sheath ( 17 ), - a spacer ( 16 ), which between the first and the second stop element ( 12 . 14 ) is arranged and acts as a stop against a reduction in the mutual distance thereof. Brake light device according to claim 7 or 10, characterized in that the brake light device comprises the following further components: - one opposite the brake cable ( 3 ' ) in the longitudinal direction displaceable first carrier ( 1' ) having a first passage (D1a '), wherein the first carrier (D1) 1' ) so over the brake cable ( 3 ' ) is pushed, that the brake cable ( 3 ' ) is performed through the first passage (D1a ') and the first stop element ( 12 ) or the bicycle brake functionally facing end ( 4a ' ) of the cable sheath ( 4 ' ) as a one-sided stop against displacement of the first carrier ( 1' ) opposite the brake cable ( 3 ' ) in the direction of the cable sheath ( 4 ' ), and - a second carrier ( 2 ' ) with a second passage (D2a '), the second support ( 2 ' ) so over the brake cable ( 3 ' ) is pushed, that the brake cable ( 3 ' ) is performed by the second passage (D2a '), and which with the brake cable ( 3 ' ), so that the second carrier ( 2 ' ) by actuating the brake mechanism because of the associated deflection of the brake cable ( 3 ' ) from the rest position under tension of a return spring ( 11 ' ) in the direction of the first carrier ( 1' ) is shifted, wherein the brake light switch (S) on the first carrier ( 1' ) and the magnet (M) on the second carrier ( 2 ' ) or vice versa, and the brake light switch (S) closes when the distance between the supports ( 1 . 2 ) falls below a threshold, and opens when this distance exceeds the threshold again. Brake light device according to claim 10 and 11, characterized in that the spacer ( 16 ) as a spacer sleeve ( 16 ), wherein - this has a longitudinal slot extending in the lateral slot, - the brake cable ( 3 ' ) in the axial direction through the spacer sleeve ( 16 ), - the first and the second carrier ( 1' . 2 ' ) each partially inside the spacer sleeve ( 16 ) are arranged and in each case through the slot to the outside of the spacer sleeve ( 16 ), and - both the brake light switch (S) and the magnet (M) outside the spacer sleeve ( 16 ) are arranged. Brake light device according to claim 2 or 7, characterized in that the brake light device comprises the following further components: - a cable sheath ( 4 ) within which the brake cable ( 3 ) is guided over a part of its length in the manner of a Bowden cable and which a bicycle brake functionally facing part or end portion of the brake cable ( 3 ), - one opposite the brake cable ( 3 ) in the longitudinal direction displaceable first carrier ( 1 ) with a first passage (D1a), which via the brake cable ( 3 ) is pushed, that the brake cable ( 3 ) is performed through the first passage (D1a) and the bicycle brake functionally facing end ( 4a ) of the cable sheath ( 4 ) as a one-sided stop against displacement of the first carrier ( 1 ) opposite the brake cable ( 3 ) in the direction of the cable sheath ( 4 ), and - a second carrier ( 2 ) with a second passage (D2a), which thus via the brake cable ( 3 ) is pushed, that the brake cable ( 3 ) is performed by the second passage (D2a), and which with the brake cable ( 3 ), so that the second carrier ( 2 ) by actuating the brake mechanism because of the associated deflection of the brake cable ( 3 ) from the rest position under tension of a return spring ( 11 ) in the direction of the first carrier ( 1 ) is shifted, wherein the brake light switch (S) on the first carrier ( 1' ) and the magnet (M) on the second carrier ( 2 ' ) or vice versa, and the brake light switch (S) closes when the distance between the supports ( 1 . 2 ) falls below a threshold, and opens when this distance exceeds the threshold again. Brake light device according to one of claims 11 to 13, characterized in that - on the first carrier ( 1 . 1' ) one of the brake cable ( 3 ) spaced first slider ( 6 . 6 ' ) is rigidly arranged, which the first carrier ( 1 . 1' ) parallel to the brake cable ( 3 . 3 ' ), - on the second support ( 2 . 2 ' ) one of the brake cable ( 3 . 3 ' ) also spaced second slider ( 8th . 8th' ) is rigidly arranged, which the second carrier ( 2 . 2 ' ) also parallel to the brake cable ( 3 ), and - the first and the second slider ( 6 . 6 ' . 8th . 8th' ) are telescopically inserted into each other. Brake light device according to claim 14, characterized in that - the first carrier ( 1 . 1' ) as a first double sleeve ( 1 . 1' ) which has a first auxiliary passage (D1b, D1b ') parallel to the first passage (D1a, D1a'), with which the first slide (11) 6 . 6 ' ), - the second carrier ( 2 . 2 ' ) as a second double sleeve ( 2 . 2 ' ), which has a second additional passage (D2b, D2b ') parallel to the second passage (D2a, D2a'), with which the second slide (12) 8th . 8th' ) is aligned, and The mutual distance of the center axes of the first passage (D1a, D1a ') and the first additional passage (D1b, D1b') is the same as the mutual distance of the center axes of the second passage (D2a, D2a ') and the second additional passage (D2b, D2b '), and - at least part of the adjusting spindle ( 10 ) is arranged either in the first or in the second additional passage (D1b, D1b ', D2b, D2b'). Brake light device according to claim 15, characterized in that on the first double sleeve ( 1 ) Furthermore, a first cable conduit ( 5 ) is arranged rigidly, which is aligned with each of the first passage (D1a), wherein - the brake cable ( 3 ) through the first cable tube ( 5 ), - on the second double sleeve ( 2 ) a second cable conduit ( 7 ) is arranged rigidly, which is aligned with each of the second passage (D2a), - the brake cable ( 3 ) also through the second cable tube ( 7 ), and - the first and the second cable conduit ( 5 . 7 ) are also inserted telescopically into each other, so that the first and the second double sleeve ( 1 . 2 ) are slidingly slidable against each other in the brake cable direction. Brake light device according to one of claims 14 to 16, characterized in that the magnet (M) at least partially in the interior of the first slider ( 6 . 6 ' ) and the brake light switch (S) at least partially inside the second slider ( 8th . 8th' ), or vice versa. Brake light device according to one of claims 10 to 17, characterized in that the cable sheath ( 4 . 4 ' ) in the anvil of a handbrake handle or brake lever ends and the brake cable ( 3 . 3 ' ) movably in the handbrake handle or brake lever ends. Brake light device according to one of claims 3 to 7 and according to claim 14, characterized in that the magnet (M) on or in the first slider ( 6 . 6 ' ) and the reed switch (S) or the reed relay on or in the second slider ( 8th . 8th' ) is arranged, or conversely, the magnet (M) on or in the second slider ( 8th . 8th' ) and the reed switch (S) or the reed relay on or in the first slider ( 6 . 6 ' ) is arranged so that the distance between the magnet (M) and reed switch (S) or reed relay when the brake mechanism is unactuated and larger when the brake mechanism is actuated is smaller than the limit value. Brake light device according to claim 5 and 14, characterized in that the magnet (M) by means of the adjusting spindle ( 10 ) in the direction of the brake cable ( 3 . 3 ' ) adjustable in or on the first slider ( 6 . 6 ' ) is arranged. Brake light device according to one of the preceding claims, characterized in that the power source (Q) is a battery, an accumulator or a dynamo is. Brake light device according to one of the preceding claims, characterized characterized in that the brake light device on a bicycle available or upgradeable is. Brake light device according to claim 2 or 7, characterized in that the brake light device comprises the following further components: - a cable sheath ( 4 ) within which the brake cable ( 3 ) is guided over a part of its length in the manner of a Bowden cable and which is a part of the brake cable facing the brake cable or portion ( 3 ), - a first double sleeve ( 1 ), which has two parallel passages (D1a, D1b), wherein - a first cable conduit ( 5 ) and a first slider ( 6 ) each on the first double sleeve ( 1 ) are rigidly arranged and each having one of the two parallel passages (D1a, D1b) of the first double-sleeve ( 1 ), - these so over the brake cable ( 3 ) is pushed, that the brake cable ( 3 ) through one of these passages (D1a, D1b) and the first cable tube ( 5 ), and - the bicycle brake facing end ( 4a ) of the cable sheath ( 4 ) as a one-sided stop against displacement of the first double hull ( 1 ) opposite the brake cable ( 3 ) in the direction of the cable sheath ( 4 ), - a second double sleeve ( 2 ), which also has two parallel passages (D2a, D2b) whose center axes have the same mutual distance as the center axes of the two passages (D1a, D1b) of the first double-sleeve ( 1 ), wherein - a second cable conduit ( 7 ) and a second slider ( 8th ) each rigidly to the second double sleeve ( 2 ) are arranged and with in each case one of the two parallel passages (D2a, D2b) of the second double-sleeve ( 2 ), - these so over the brake cable ( 3 ) is pushed, that the brake cable ( 3 ) through one of these passages (D2a, D2b) and the second cable tube ( 8th ), the first and the second cable conduit ( 5 . 7 ) are telescopically inserted into each other and also the first and the second slider ( 6 . 8th ) are telescopically inserted into each other, so that the first and the second double envelope ( 1 . 2 ) are slidable against each other in the brake cable direction, - the second double sleeve ( 2 ) firmly with the brake cable ( 3 ) is connected, so that these in a displacement of the first double hull ( 1 ) opposite the brake cable ( 3 ) in the direction of the second double sleeve ( 2 ) acts as a stop and by pressing the Brake mechanism due to the associated deflection of the brake cable ( 3 ) from the rest position under tension of a return spring ( 11 ) in the direction of the first double sleeve ( 1 ), wherein the brake light switch (S) closes when the distance between the double sleeves ( 1 . 2 ) falls below a threshold, and opens when this distance exceeds the threshold again.