DE102010029547A1 - Lighting device for two-wheeler, particularly bicycle, has light module with semiconductor light source, where mounting element is provided for mounting light module on two-wheeler, particularly on handlebar of two-wheeler - Google Patents

Abstract

The lighting device (2) has a light module (3) with a semiconductor light source. A mounting element (4) is provided for mounting the light module on a two-wheeler, particularly on a handlebar of the two-wheeler. The mounting element is formed as a thermally conductive element, and is formed by metallic clamps (4a,4b). Independent claims are also included for the following: (1) a two-wheeler; and (2) a method for fixing a light bulb, particular light module, in a two-wheeler.

Description

The invention relates to a lighting device for a bicycle with at least one semiconductor light source and a fastening element for attachment to a bicycle. The invention further relates to a bicycle with a lighting device and a method for attaching a light bulb to a bicycle.

There are LED bicycle lights with a plastic housing known, wherein the plastic housing receives a plurality of light emitting diodes and a battery compartment. The plastic housing may be secured to the handlebar via a plastic fastener with a flexible plastic strap, which is typically wrapped around a handlebar or seat post of the bicycle and then tightened to fix the LED bicycle light to the handlebar (e.g. B. by means of a so-called. "Flex-Tight" attachment). The housing can serve as an abutment. Alternatively, the plastic housing can be attached via a fastener in the form of a two-piece plastic clamp on the handlebars by the two parts of the plastic clamp surrounding the handlebar or the seat post of the bicycle and then pulled together to produce a press fit, z. B. screwed together, be. In order to protect the LED bicycle light from theft, the housing is usually connected via a releasable plug or latching connection with the fastener.

It is the object of the present invention to provide a lighting device with at least one semiconductor light source for a bicycle, which has an increased service life.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The output is achieved by means of a lighting device for a bicycle, having at least one light module with at least one semiconductor light source and having a fastening element for fastening the light module to a bicycle, wherein the fastening element is designed as a heat-conducting element.

In contrast to the known bicycle lights, a waste heat generated by the semiconductor light source (s) can now (as opposed to the usual plastic attachment) be dissipated via the fastening element, which also acts as a thermal bridge, to the bicycle. The bicycle serves as a heat sink (heat spreading element and / or heat sink). As a result, the at least one semiconductor light source can be cooled more, which increases its service life. Alternatively, the lighting device can be operated at the same lifetime with a higher power.

A bicycle may be understood to mean in particular a bicycle or a motorcycle (including moped, moped, etc.).

A lighting module may in particular be understood to mean an assembly which has a housing in which there is at least one light source carrier with the at least one semiconductor light source applied thereto. In particular, the housing may have a light-permeable cover for the at least one semiconductor light source. In particular, a drive circuit (eg driver) for the at least one semiconductor light source and / or a battery compartment (for batteries or an accumulator) can be located in the housing. In particular, the lighting module can be a separately manufacturable and independently operable module.

The housing is designed so that it covers at least the current-carrying areas of the module. In particular, it can be a comprehensive housing. The housing may further be formed integrally with optics, in particular primary optics, for beam formation or contain such.

Preferably, the at least one semiconductor light source comprises at least one light-emitting diode. If several LEDs are present, they can be lit in the same color or in different colors. A color can be monochrome (eg red, green, blue, etc.) or multichrome (eg, white). The light emitted by the at least one light-emitting diode can also be an infrared light (IR LED) or an ultraviolet light (UV LED). Several light emitting diodes can produce a mixed light; z. B. a white mixed light. The at least one light-emitting diode may contain at least one wavelength-converting phosphor (conversion LED). The at least one light-emitting diode can be in the form of at least one individually housed light-emitting diode or in the form of at least one LED chip. Several LED chips can be mounted on a common substrate ("submount"). The at least one light emitting diode may be equipped with at least one own and / or common optics for beam guidance, z. At least one Fresnel lens, collimator, and so on. Instead of or in addition to inorganic light emitting diodes, z. Based on InGaN or AlInGaP, organic LEDs (OLEDs, eg polymer OLEDs) can generally also be used. Also z. As diode lasers or other semiconductor light sources can be used.

The fact that the fastening element is designed as a heat-conducting element may comprise in particular that the fastening element has at least one good heat-conducting thermal channel or path between a contact surface with the at least one light module and a contact surface with the bicycle, which has a thermal conductivity of at least 15 W / (m · K).

It is an embodiment that the fastener substantially completely made of a metal, for. As aluminum or stainless steel, consists, since it is very easy to produce and has a very high thermal conductivity. Also, their freedom from rust is beneficial. Generally, however, the material of the fastener is not limited to metals, but may, for. B. alternatively or additionally include carbon embodiments, thermally conductive plastics and / or thermally conductive ceramics.

The lighting device may in particular be provided and / or adapted to be attached to a handlebar tube (in particular when used as a headlight) or a seat post (in particular when used as a reversing light) of a bicycle.

It is preferred for good heat conduction to the bicycle when the lighting device is attached to an at least partially metallic surface of the bicycle. The metallic surface can be exposed or painted.

It is still a development that the light module at least one thermal contact surface, for. B. made of metal, via which the light module is connectable to the fastening element. Thus, a high and locally well defined heat flow can be maintained via the thermal contact between the light module and the fastener.

It is an embodiment that the fastening element is designed as a thermally conductive clip. The clip may in particular consist of metal. The clip can be snapped in a variant on the bicycle, z. B. on a handlebar.

It is still an embodiment that the fastening element is designed in several parts. So a particularly diverse mounting option can be achieved. For example, the fastening element can be designed in two parts, so that it can be wrapped around a fastening region of the bicycle and then pulled together. This results in a firm grip even with different trained attachment areas. For example, the fastener may be formed in two parts with parts of substantially the same basic shape. Then, in particular for attachment to a circular cylindrical attachment region of the bicycle (eg on a handlebar tube or a seat post), a contact region (inner contour) of each of the two parts with the bicycle can be substantially circular segment-shaped, in particular substantially semicircular. The parts of the fastener may be formed in particular like a half-shell at least on its inner side.

It is a further embodiment that the lighting module is designed in several parts. For example, a light module part, which in particular has a separate housing, the semiconductor light sources ("light source module part"), while another light module part, which also has in particular a separate housing, at least part of the control electronics have ("electronic module part"). In particular, the light module parts can be suitably electrically wired in order to be able to work as a single functional unit. The individual light module parts can be manufactured separately.

In particular, the lighting device may be configured so that the fastening element, in particular the clip, and the light module are each made in two parts and attached to eifern first thermally conductive part of the fastener, a first part of the light module, which comprises the at least one semiconductor light source (the light source module part), and a second part of the lighting module is attached to a second thermally conductive part of the fastening element, which part of a drive circuit for the at least one semiconductor light source comprises (the electronic module part). Due to the spatial separation of potentially two heat sources (semiconductor light source (s) and driver), a particularly effective heat dissipation can be achieved.

It is an alternative embodiment that the fastening element, in particular clip, has a single thermally conductive part, to which both the light source module part and the electronic module part are fastened. Of course, only one (single) light module can be attached to the single thermally conductive part.

It is also an embodiment that the fastening element comprises a releasable latching means for latching with a fastened to the bicycle mount. The latching means and the holder (which may then have a corresponding latching countermeasure) may correspond, for example, in their basic structure to a conventional attachment of a known bicycle lamp, but now heat-conducting.

The fastener can also be attached differently to the bicycle, z. B. by means of a screw, by means of a bond, etc.

It is also an embodiment that the lighting module can be aligned with the fastening element. Thus, a light cone emitted by the light module can be aligned without having to move the fastening element on the bicycle.

For this purpose, for example, the lighting module can be slidably mounted in a trough of the fastener.

Alternatively, the lighting module can be fastened to the fastening element by means of a cylinder joint. Thus, the lighting module can be fastened by means of a horizontal cylindrical joint or by means of a stationary cylinder joint to the fastening element. Alternatively, z. B. also a ball joint used.

The object is also achieved by a two-wheeler, wherein the bicycle has at least one lighting device as described above. This results in the same advantages as described above.

It is a development that the at least one lighting device is attached to an at least partially metallic region of the bicycle. This results in a particularly effective heat transfer. The metallic region may be, for example, a handlebar tube (or handlebar), a head tube or a seatpost of the two-wheeler. The metallic area can be free or painted.

It is still a development that the bicycle has at least one trained mounting interface for attaching a light module. A trained attachment interface may, in particular, be understood to mean a region of the two-wheeled vehicle which is specially designed for attachment of the illumination module. The attachment interface can, for. Example, be a flat flat in the tube on which the light module, for example, flat (eg., With its back) can be attached. Thus, the light module can be attached to the bicycle in a defined and particularly compact manner even without a dedicated fastener.

The light module can, for example, directly to the bicycle by means of an adhesive, for. B. thermal adhesive to be attached.

The at least one attachment interface may in particular be located on a handlebar tube of a two-wheeler. For example, a mounting interface can be located on each branch of the handlebar tube.

The object is also achieved by a method for attaching a light source, in particular light module, to a bicycle, wherein the light source (directly) to the bicycle, in particular to a handlebar tube of the bicycle, is glued. Alternatively, the bulb can be screwed on, etc. Thus, the light module can be attached to the bicycle in a particularly compact manner.

It is a further development that the light-emitting means is attached, in particular glued, to a fastening interface formed on the bicycle.

It is still a development that the lamp is glued to a (exposed or painted) metallic area of the bicycle.

In the following figures, the invention will be described schematically with reference to exemplary embodiments. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows in plan a branch of a handlebar tube (steering fork) with a lighting device according to the invention according to a first embodiment;

2 shows a side view of a lighting device according to the second embodiment;

3 shows a side view of the lighting device according to a third embodiment;

4 shows a sectional view of a lighting device according to a fourth embodiment;

5 shows a sectional view of a lighting device according to a fifth embodiment;

6 shows a sectional view of a lighting device according to a sixth embodiment;

7A shows a side view of a branch of a handlebar tube with a light module in a first manner of attachment;

7B shows in supervision the branch of the handlebar tube 7A with the light module in the first attachment;

8A shows a side view of a branch of a handlebar tube with a light module in a second manner of attachment; and

8B shows in supervision the branch of the handlebar tube 8A with the light module in the second mounting.

1 shows in supervision a branch of a handlebar tube 1 a bicycle with a lighting device 2 according to a first embodiment. The lighting device 2 has a light module in the form of an LED module 3 on which on a fastener 4 is appropriate.

The LED module 3 has a housing 5 in which at least one light emitting diode, an associated driver electronics and possibly a battery compartment or an accumulator are arranged (o. Fig.). On one side is the case 5 with a translucent cover 6 equipped by the light emitted by the at least one light emitting diode can be discharged to the outside, here forward in a direction F of the bicycle. During operation of the LED module 3 This heats up due to waste heat of the LEDs.

The fastener 4 is formed as a two-piece clip, with each of the two clip parts 4a . 4b from a metal, z. B. aluminum, is formed. The clamp parts 4a . 4b are formed on the inside half-shell-shaped and can thus essentially fit around the handlebar tube 1 set around and connected to each other, z. B. by means of a screw that they are the handlebar tube 1 hold in a press fit. Here are the two staple parts 4a . 4b on a common impact surface 7 at. The fastener 4 is designed on the outside rectangular.

Through the metallic fastener 4 can heat from the LED module 3 effectively to the handlebar tube 1 be derived. The fastener 4 thus serves as a heat conducting element. The handlebar tube 1 serves both for heat spreading and, in particular during driving, as a convection heat sink.

Alternatively, the LED module may also be configured to be connected to an external power supply, e.g. B. by means of a power cable, not shown here, for. B. with an external battery, battery, dynamo or alternator.

The LED module can z. B. may also be attached to a seat post and then used for use as a tail lamp (eg, with at least one red LED).

2 shows a side view of a lighting device 10 according to a second embodiment. The lighting device 10 has a two-part fastener 4 . 4a . 4b similar to the one out 1 on. The LED module 11 is now made in two parts with a first part, which is a separate case 12 in which the semiconductor light sources are housed (the light source module part 13 ), as well as with a further part, which is an independent housing 14 comprising at least part of the control electronics (electronic module part 15 ). The light module parts 13 . 15 are particularly suitable electrically wired, z. B. via at least one (possibly also detachable) cable or a built-in plug contact, so that the LED module 11 works as a single functional entity.

The two clamp parts 4a . 4b of the fastener 4 For example, they can be bolted together. Alternatively, the two staple parts 4a . 4b also be connected with each other differently, eg. B. pivotally connected to each other, in particular on one side by a hinge and on the other side by a screw, a locking connection, etc.

The lighting device 10 has the advantage that two heat sources, namely the semiconductor light source (s) on the one hand and the driver electronics on the other hand, are spatially separated from each other and the fastener 4 so heat can be better distributed and therefore more effectively derive.

3 shows a side view of a lighting device 20 according to a third embodiment. Here, the lighting device 20 a fastener 21 on that as a one-piece fastener 21 with a single heat-conducting area 22 equipped, z. B. aluminum. The heat-conducting area 22 is approximately half-shell-shaped, with the LED module 27 on an outside 23 is attached and the heat-conducting area 22 a designated contact area 24 on its inside 25 having.

For fastening the lighting device 20 on the bicycle, z. B. the handlebar tube 1 , has the fastener 21 a rubber belt 26 or a fabric belt, which z. B. after placing the inside 25 can be tightened on the bicycle or designed as a hook and loop fastener.

The LED module 27 is in two parts with a light source module part 13 and an electronic module part 15 formed, which now on the same heat-conducting region 22 are attached. The light source module part 13 has a reflector 28 on, which in the emission direction of the LED 29 is arranged around this.

4 shows a section of a section of a lighting device 30 according to a fourth embodiment. The lighting device 30 , z. B. the fastening element 31 , Has a trough-shaped recess or tub 32 on, in which the LED module 3 is slidably mounted or can run, as indicated by the arrows. This can be z. B. be realized so that the LED module 3 has at least one laterally projecting pin, which in an elongated recess or groove of the fastener 31 to be led. About the groove and the pin can also be a power supply and / or control of the LED module 3 be performed.

5 shows a section of a section of a lighting device 40 according to a fifth embodiment. The lighting device 40 , z. B. the fastening element 41 , has a horizontal cylinder joint 42 on. The horizontal cylinder joint 42 has a recording 43 for a respect to a main emission direction or optical axis of the LED module 3 vertically arranged cylinder 44 on. The cylinder 44 carries the LED module 3 , Depending on the orientation of the lighting device 40 can the LED module 3 especially to the left and right or up and down to be twisted.

6 shows a section of a section of a lighting device 50 according to a sixth embodiment. The lighting device 50 , z. B. the fastening element 51 , shows a standing cylinder joint 52 on. The standing cylinder joint 52 has a recording 53 for a respect to a main emission direction or optical axis of the LED module 3 parallel and rotatably arranged cylinder 54 on. The cylinder 54 carries on a deck surface the LED module 3 ,

7A and 7B show a branch of a handlebar tube 1 with a light module 3 , wherein the light module 3 with his back 61 directly to the handlebar tube 1 is glued, z. B. by means of a thermal adhesive. This eliminates the need for a fastener and a particularly compact lighting solution can be provided.

8A and 8B show a branch of a handlebar tube 1 with a light module 3 in a second type of attachment. The light module 3 is now on a specially designed attachment interface 70 of the handlebar tube 1 been installed. The mounting interface 70 is characterized by having one in the handlebar tube 1 , in particular its front, introduced recess 71 with a level bottom 72 has, so that the back of the LED module 3 flat on the ground 72 can be attached, which forms a large heat transfer surface.

In the embodiments according to 7A and 7B such as 8A and 8B is dispensed with a dedicated fastener.

Of course, the present invention is not limited to the embodiments shown.

Thus, the power supply may be generally integrated into the lighting device, for. B. in the form of a battery compartment and / or a rechargeable battery, or be arranged externally. The external power supply can, for. B. may be formed as an external battery pack or a rechargeable battery or comprise a dynamo or other installed on the bicycle power generating system such as an alternator or be connected to it.

LIST OF REFERENCE NUMBERS

1

handlebar tube

2

lighting device

3

LED module

4

fastener

4a

clamp part

4b

clamp part

5

casing

6

translucent cover

7

abutting face

10

lighting device

11

LED module

12

casing

13

Light source module part

14

casing

15

Electronics module part

20

lighting device

21

fastener

22

heat conducting area

23

outside

24

contact area

25

inside

26

rubber belts

27

LED module

28

reflector

29

led

30

lighting device

31

fastener

32

tub

40

lighting device

41

fastener

42

cylindrical joint

43

admission

44

cylinder

50

lighting device

51

fastener

52

cylindrical joint

53

admission

54

cylinder

61

back

70

Mounting interface

71

deepening

72

ground

Claims (15)

Lighting device ( 2 ; 10 ; 20 ; 30 ; 40 ; 50 ) for a two-wheeler ( 1 ), comprising at least one light module ( 3 ; 11 ; 27 ) with at least one semiconductor light source ( 29 ) and comprising a fastening element ( 4 ; 21 ; 31 ; 41 ; 51 ) for fixing the light module ( 3 ; 27 ) on a two-wheeler ( 1 ), in particular on a handlebar tube of a bicycle, wherein the fastening element ( 4 ; 21 ; 31 ; 41 ; 51 ) is formed as a heat conducting element. Lighting device ( 2 ; 10 ) according to claim 1, wherein the fastening element ( 4 ) as a thermally conductive, in particular metallic, bracket ( 4a . 4b ) is trained. Lighting device ( 10 ) according to one of the preceding claims, wherein the lighting module ( 11 ) is formed in several parts. Lighting device ( 10 ) according to claims 2 and 3, wherein the bracket ( 4 . 4a . 4b ) and the light module ( 11 . 13 . 15 ) are each made in two parts and on a first thermally conductive part ( 4a ) of the bracket ( 4 ) a first part ( 13 ) of the light module ( 11 ), which comprises the at least one semiconductor light source and on a second thermally conductive part ( 4b ) of the bracket ( 4 ) a second part ( 15 ) of the light module ( 11 ), which comprises at least a part of a drive circuit for the at least one semiconductor light source. Lighting device ( 20 ) according to claim 2, wherein the clip is a thermally conductive part ( 22 ), on which both a light source module part ( 13 ) as well as an electronic module part ( 15 ) are attached. Lighting device according to claim 1, wherein the fastening element comprises a releasable latching means for latching with a mountable to the bicycle holder. Lighting device ( 30 ; 40 ; 50 ) according to one of the preceding claims, wherein the lighting module ( 3 ) on the fastening element ( 31 ; 41 ; 51 ) is alignable. Lighting device ( 30 ) according to claim 7, wherein the light module ( 3 ) in a tub ( 32 ) of the fastener ( 31 ) is slidably mounted. Lighting device ( 40 ; 50 ) according to claim 7, wherein the light module ( 3 ) by means of a cylinder joint ( 42 ; 52 ) on the fastening element ( 41 ; 51 ) is attached. Two-wheeler, wherein the bicycle has at least one lighting device ( 2 ; 10 ; 20 ; 30 ; 40 ; 50 ) according to one of the preceding claims. A bicycle according to claim 10, wherein the at least one lighting device ( 2 ; 10 ; 20 ; 30 ; 40 ; 50 ) at an at least partially metallic region of the bicycle, in particular a handlebar tube ( 1 ) of the two-wheeler, is attached. A bicycle according to one of claims 10 or 11, wherein the bicycle, in particular the handlebar tube of the bicycle, at least one trained fastening interface ( 70 ) for fixing a light module ( 3 ) having. Method for fastening a luminous means, in particular a luminous module ( 3 ), on a two-wheeled vehicle, whereby the illuminant ( 3 ) directly on the bicycle, in particular on a handlebar tube ( 1 ) of the bicycle, attached, in particular glued, is. The method of claim 13, wherein the lighting means ( 3 ) to a fastening interface formed on the bicycle ( 70 ) is attached. Method according to one of claims 13 or 14, wherein the lighting means ( 70 ) to a metallic area ( 1 ) of the bicycle is glued.

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