EP1312858B1 - Winding device - Google Patents

Abstract

The apparatus (23) has a guiding unit (25) that leads a drawing material (32) onto a cylindrical drum surface (37) of a reel (24) rotatable about its axis relative to the guiding device. The drawing material can be taken up onto the drum surface to adjust the height of a suspended luminaire. The axis of the reel is oriented in the direction in which the drawing material runs on entering the winding apparatus.

Description

The invention relates to a winding device with a guide device, by means of which a traction means on a cylindrical surface of a rotatable about its axis relative to the guide coil and can be received on this lateral surface.

Generally known is such a winding device for receiving the support cable of a powered with mains voltage pendant lamp, wherein the support cable is guided within the spirally wound power cord for powering the pendant lamp.

DE 4 413 381 A discloses the features of the preamble of claim 1.

Such winding devices are usually hidden for visual reasons in the ceiling connection of the pendant light, for example under a suspended ceiling. In a provided for mounting on a commercial ceiling hook pendant lamp, the winding device is usually integrated in the this hook and the power supply hiding cover - making this cover is necessarily much larger than comparable lights without height adjustment.

In the US Pat. No. 1,659,160 A known winding device consists essentially of a horizontally lying coil for receiving the supporting cable in a - closed plastic housing - except for an inlet opening for the supporting cable in the bottom. In this plastic housing, the support cable is wound up or unwound by rotation of the coil about its axis, wherein a housing attached to the coil and torsion spring of the weight of the lamp body holds substantially the balance. In this way, the lamp body - within the predetermined by the length of the supporting cable area - can be adjusted to any height without high force.

The known winding devices are hardly useful in the field of low-voltage lighting technology due to their own eye-catching dimensions.

The object of the invention is to propose a winding device, which is suitable due to their dimensions as a height adjustment of a low-voltage pendant lamp and to connect with such a visually advantageous advantage.

Starting from the winding device described above, this object is achieved by the invention in that the axis of the coil is aligned in the direction in which the Traction means when entering the winding device runs. In this way, the winding device in the direction of the traction means can be particularly slim - and be designed in the case of the pendant light optically particularly attractive.

In a preferred embodiment of the invention, the coil is designed to be movable in the direction of its axis relative to the guide. Thus, the turns of the traction means can be accommodated on the spool axially offset.

A forced coupling of the rotational and translational movement of the coil relative to the guide can be realized without further mechanical components by interlocking threads in a contact surface of both components. If the pitch of the thread is selected (at least slightly) larger than the diameter of the traction means, then successive turns of the traction means are deposited in a particularly simple manner next to one another on the spool.

The number of components of the winding device according to the invention can be kept low when the threads are mounted on the lateral surface of the coil and on an inner cylindrical surface of a coil surrounding the coil. Is here (as described above), the pitch of the thread chosen larger than the diameter of the traction means, this is deliberately stored in the threads. If two separate traction means are to be deposited on the same spool at the same time - for example, a low-voltage halogen pendant light suspended from two conductors - this thread should be designed to be particularly double-threaded.

In an alternative embodiment, the guide has a mandrel with a thread on the outside, which is in engagement with an internal thread of the coil. The traction means is then preferably received on a non-profiled lateral surface of the coil. The mandrel can be made of a thermoplastic material to reduce the manufacturing cost in a molded thread process by injection molding. For the components of the guide, which have visible surfaces, then higher quality, more complex materials to be processed - metal (for example, aluminum) or colored glass - are used.

Preferably, the winding device is - especially when used for height adjustment of a pendant lamp - equipped with a drive device that makes a manual intervention on the winding device for winding or unwinding of the traction device superfluous. As with the known from the prior art winding devices, a torsion spring can be used here, which holds a tensile force in the traction means the balance. The winding and unwinding of the traction device is then set by a slight change in this tensile force - for example, by slightly lifting the lamp body of a pendant lamp-in motion.

A further embodiment has - as an alternative or in addition to the torsion spring - a motor which, for example, controlled via a logic circuit integrated in the winding device and an optical sensor, a non-contact winding and unwinding of the traction means - for example, for height adjustment of a pendant lamp - allows.

In a preferred embodiment of the winding device according to the invention, the traction means is first passed through the coil and only then by the guide onto the lateral surface of the coil. In particular, when used for height adjustment of a pendant lamp, this results in the advantage that only the upper end of the winding device - here the coil - rotates relative to the traction means. This rotational movement is then not transferred to the bottom of the winding device - here on the guide - mounted lamp body.

The winding device according to the invention is used in particular for height adjustment of a pendant lamp. Due to the lying in the direction of the traction means longitudinal axis of the coil, the winding device is optically particularly advantageous to integrate into the typical filigree construction of a low-full light.

The impression of the simplicity of the construction is particularly supported if the traction means carrying the luminaire is an electric cable used to supply power to the luminaire, especially if both conductors are integrated therein - the use of a coaxial cable is preferred here. If a coaxial cable not insulated from the outside is used, the lamp can be combined with a touch dimmer in a particularly simple manner, as it is known from US Pat DE 196 28 891 is known.

A variety of design possibilities of such a pendant lamp using the winding device according to the invention results in particular when this is combined with the lamp body in a structural unit.

Fig. 1

eine seitliche Ansicht einer Wickelvorrichtung,

Fig. 2

einen Längsschnitt und

Fig. 3

eine perspektivische Ansicht der Wickelvorrichtung nach Fig 1,

Fig. 4

eine perspektivische Teil-Explosionsansicht einer zweiten Wickelvorrichtung,

Fig. 5

einen Längsschnitt und

Fig. 6

eine perspektivische Ansicht der Wickelvorrichtung nach Fig. 2 und

Fig. 7

eine perspektivische Ansicht einer dritten Wickelvorrichtung.

The invention will be explained with reference to three exemplary embodiments, which are shown in three schematic sketches. It shows

Fig. 1

a side view of a winding device,

Fig. 2

a longitudinal section and

Fig. 3

a perspective view of the winding device according to Fig. 1 .

Fig. 4

3 is a partial exploded perspective view of a second winding device;

Fig. 5

a longitudinal section and

Fig. 6

a perspective view of the winding device according to Fig. 2 and

Fig. 7

a perspective view of a third winding device.

The FIGS. 1 to 3 . 4 to 6 and 7 show three different, designated by the reference numerals 1, 23 and 46 embodiments of crirnungsungsgemäßen winding device for height adjustment of a pendant lamp in low-voltage halogen technology. The winding device 1, 23, 46 consists essentially of a coil 2, 24, 47 and a guide 3, 25, 48, which are rotatable relative to each other and in the direction of the coil axis 4, 26, 49 are movable, these movements by a catchy Thread 5, 27 (not shown on the winding device 46) are coupled with a pitch of about 4 mm.

To assist the movement, the winding device 1, 23 has a torsion spring 6, 28 (not shown on the winding device 46), which at one end to the guide 3, 25, 48 and connected at the opposite end to the coil 2, 24, 47 is. The winding device 1, 23 is combined with a lamp body 7, 29 to form a structural unit. On the winding device 1, 23 of the lamp body 7, 29 attached to the coil 2, 24, on the winding device 46 in a manner not shown on the guide 48.

The coil 2, 24, 47 is made of aluminum rod material, the guide 3, 25, 48 made of a tube of the same material. For manufacturing reasons, a made of plastic by injection molding, two-part core 8, 30 is used with a curved channel 9,31 in the guide 3, 25, 48.

The lamp body 7, 29 (not shown on the winding device 46) is supplied via a 3 mm thick two-core coaxial cable 10, 32, 51 with not shown plaited outer wire and without external insulation with voltage. The not shown end of the cable 10, 32, 51 is connected in a manner not shown at the lower end of the coil 2, 24 or with the upper end of the coil 47. In the interior of the winding device 46, a conductive connection between the coil 47 and the guide 48 is realized by means of a slip ring connection, not shown. The coil 2, 24 and the guide 48 each carry a base 11, 33 (not shown on the winding device 46) and with this a halogen bulb 12, 34, 52nd

At the winding device 1, 23, the cable 10, 32 occurs during winding centrally from above in the axial direction 4, 26 of the coil 2, 24 in the guide 3, 25, there experiences a first deflection in the radial direction 13, 35 of the coil 2, 24th and is thus guided to the outer diameter 14, 36 of the coil 2, 24. There, the cable 10, 32 again in the axial direction 4, 26 of the coil 2, 24 deflected and guided over the lateral surface 15, 37 of the guide 3, 25 vertically downwards.

At the winding device 46, the cable 51 occurs during winding centrally from above in the axial direction 49 of the coil 47 in the coil 47, is guided through it into the guide 48, there undergoes a first deflection in the radial direction 53 of the coil 47 and so is up guided on the outer diameter 54 of the coil 47. There, the cable 51 is again deflected in the axial direction 49 of the coil 47 and guided over the lateral surface 55 of the guide 48 vertically upwards.

Even in the guide 3, 25, 48, the cable 10, 32, 51 in the tangential direction 16, 38, 56 of the coil 2, 24, 47 deflected. The coil 2, 24, 47 and the guide 3, 25, 48 are moved apart by the thread 5, 27 (not shown on the winding device 46) at the same time as the rotational movement in the axial direction 4, 26, 49 of the coil 2, 24, 47 . the cable 10, 32, 51 emerging from the guide device 3, 25, 48 is deposited on the freed area of the lateral surface 15, 37, 55 of the coil 2, 24, 47 in adjacent turns 17, 39, 57.

In the readjusted after winding position are - as before - the transmitted through the cable 10, 32, 51 tensile force from the torsion spring 6, 28 (not shown on the winding device 46) between the guide 3, 25, 48 and coil. 2 , 24, 47 acting torque and the frictional forces of the thread 5, 27 (not shown on the winding device 46) and the cable 10, 32, 51 in the guide 3, 25, 48 in equilibrium. To change the position, the user of the winding device 1, 23, 46 accesses the guide 3, 25 and guides it upwards or downwards, the coil 2, 24 rotating about its axesc 4, 26 receiving a section of the cable 10, 32 or releases.

Upon adjustment of the winding device 1, 23 of the lamp body 7, 29 rotates with the coil 2, 24. When adjusting the winding device 46 performs - attached to the guide 48 - not shown lamp body no rotation.

The coil 2, 24 has in its axial direction 4, 26 below the deposited windings 17, 39 of the cable 10, 32 an attached ring 18, 40, on the one hand, the movement of the coil 2, 24 in its axial direction 4, 26 in the guide 3, 25 limited, on the other hand, the lateral surface 19, 41 of the guide 3, 25 optically continues.

The winding device 1 has a thread 5 as an internal thread 20 in the coil 2 facing region of the guide 3 and as an external thread 21 in the guide 3 facing region of the coil 2. The gears 22 of the external thread 21 have a semicircular profile with a radius slightly larger than 1.5 mm, so that the windings 17 of the cable 10 deposited on the coil 2 can be deposited in the gears 22 without clamping action and can be picked up therefrom.

The guided in the guide 3 in the axial direction 4 of the coil 2 downwards cable 10 terminates flush with the outer surface 19 of the guide 3 from the outside. Since the cable 10 has to be guided in the radial direction 13 of the coil 2 outside the internal thread 20 of the guide 3, it is inevitable in this design that in Overall impression of the winding device 1, the deposited windings 17 of the cable 10 relative to the outer circumferential surface 19 of the guide 3 jump back radially.

By contrast, the winding devices 23 and 46 act more closed: the deposited turns 39, 57 of the cable 32, 51 terminate flush with the outer jacket surface 41, 58 of the guide 25, 48. Although in the guide 25, 48 in the axial direction 26, 49 of the coil 24, 47 to the coil 24, 47 guided cable 32, 51 also closes outwardly flush with the outer surface 41, 58 of the guide 25, 48 from, but becomes immediate on the lateral surface 37, 55 of the coil 24, 47 out.

In the winding device 23, the thread 27 is designed as an internal thread 42 on the spool 24 and as an external thread 43 on an inner tube-shaped dome 44 connected to the guide 25. This dome 44 is made with the molded external thread 43 by injection molding of a thermoplastic material and rotationally connected in a manner not shown with the guide 25. The coil 24 is located between the external thread 43 of this mandrel 44 and the inner circumferential surface 45 of the guide 25. In the same way - but not shown - in the winding device 46, the rotational and translational movements of the coil 47 and the guide 48 are coupled.

Claims (14)

1. Winding device (1, 23, 46) with a guide unit (3, 25, 48), by means of which a drawing means (10, 32, 51) can be guided onto a cylindrical outer surface (15, 37, 55) of a reel (2, 24, 47) rotatable about its axis (4, 26, 49) relative to the guide unit (3, 25, 48) and placed on the said outer surface (15, 37, 55), wherein the axis (4, 26, 49) of the reel (2, 24, 47) is oriented in the direction in which the drawing means (10, 32, 51) extends when entering the winding device (1, 23, 46), characterised in that the reel (2, 24, 47) is movable relative to the guide unit (3, 25, 48) in the direction of its axis (4, 26, 49), wherein the rotation and the translation of the reel (2, 24, 47) relative to the guide unit (3, 25, 48) are coupled by means of two meshing threads (5, 27).
2. Winding device (1, 23, 46) according to the aforesaid claim, characterised in that the pitch of the thread (5, 27) exceeds or is equal to the diameter of the drawing means (10, 32, 51).
3. Winding device (1) according to the aforesaid claim, characterised in that the thread (5) is provided on the inside (20) of the guide unit (3) and on the outer surface (15) of the reel (2).
4. Winding device according to the aforesaid claim, characterised in that the thread is a double-start thread able to accommodate two drawing means.
5. Winding device (23, 46) according to claim 1, characterised in that the thread (27) is provided on the outside (43) of a tower (44) on the guide unit (25, 48) and on the inside of the reel (24, 47).
6. Winding device (1, 23, 46) according to one or more of the aforesaid claims, characterised in that the reel (2, 24, 47) and the guide unit (3, 25, 48) are rotatable relative to one another by means of a drive unit.
7. Winding device (1, 23, 46) according to the aforesaid claim, characterised in that the drive unit comprises a torsion spring (6, 28).
8. Winding device (46) according to one or more of the aforesaid claims, characterised in that the drawing means (51) is guided through the reel (47) before being placed thereon.
9. Pendant lamp, in particular in low-voltage technology, characterised in that the level of a lamp body (7, 29) is adjustable by the placement of a drawing means (10, 32, 51) supporting the said lamp body on a winding device (1, 23, 46) according to one or more of the aforesaid claims.
10. Pendant lamp according to the aforesaid claim, characterised in that the drawing means (10, 32, 51) is an electric cable.
11. Pendant lamp according to the aforesaid claim, characterised in that the electric cable comprises two conductors.
12. Pendant lamp according to one or more of claims 10 and 11, characterised in that the electric cable is designed as a coaxial cable.
13. Pendant lamp according to the aforesaid claim, characterised in that the coaxial cable is not insulated towards the outside.
14. Pendant lamp according to one or more of claims 9 to 13, characterised in that the lamp body (7, 29) is directly joined to the winding device (1, 23, 46).

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