EP4319598A1

EP4319598A1 - Lighting device and a music stand with such a lighting device

Info

Publication number: EP4319598A1
Application number: EP22720991.3A
Authority: EP
Inventors: Daniel SCHUSTER; Daniel SCHMIDBERGER
Original assignee: Atl Og
Current assignee: Atl Og
Priority date: 2021-04-06
Filing date: 2022-04-05
Publication date: 2024-02-14
Also published as: AT524918B1; AT524918A1; WO2022214498A1

Abstract

The invention relates to a lighting device (1) comprising an illumination device (4) for illuminating an object, an arm (3) comprising the illumination device (4), wherein the illumination device (4) is arranged approximately parallel to the arm (3), and a position adjustment device (2) having a linear guide device, wherein the arm (3) and the illumination device (4) are translationally displaceable along a linear axis (7) by means of the position adjusting device and the arm (3) is arranged orthogonally to the linear axis (7).

Description

Lighting device and a music stand with such a lighting device

The present invention relates to a lighting device and a music stand with such a lighting device.

CN 210295885 U discloses a lighting device for a sheet music holder on a piano. The lighting device comprises two telescopic arms, each with a joint in the middle, which are attached in an outer area on the back of the sheet music holder. The free ends of the telescopic arms are connected to a lighting device, so that the lighting device can be pivoted in the direction of the sheet music holder in a region on the front side of the sheet music holder. The lighting device itself is also rotatably mounted.

CN 209610297 U discloses a lighting device for a sheet music holder, the lighting device being arranged on the face of the sheet music holder. The lighting device has a wall running perpendicularly to the sheet music holder, at the upper end of which a type of hinge is attached, to which a second wall with a lighting device is attached, so that the lighting device can be pivoted in the direction of the sheet music holder.

The CH 606903 A5 has an adjustable glowstick holder for a sheet music holder. The adjustable light stick holder includes two interconnected articulated and angled angle levers. A first bell crank is arranged on the underside of the sheet music holder. A second bellcrank is connected to the first bellcrank and includes a glow stick. The second angle lever can be pivoted in the direction of the sheet music holder in an approximately horizontal position.

Document CN 211323568 U shows a tiltable sheet music holder which has two arcuate lamps on its front side, which are attached to the upper side of the sheet music holder and are bent in such a way that they illuminate the surface of the sheet music holder.

CN 210601223 U discloses a position shifting device for lamps, with two rails running parallel to one another being arranged, between which a pair of guide rollers are guided. A plate-shaped lamp is attached to the side of the guide rollers.

The document KR 20140000882 U describes a lamp device. The lamp assembly includes a rod-shaped lamp holder pivotally connected to a first leg. The first leg is also pivotably connected to a second leg, the second leg being fixable, for example, to a table edge. The lamp holder can be swiveled both horizontally and vertically by means of the swivel joints. EP 3 130847 A1 discloses a device for connecting a lamp to a foldable music stand, the device 1 comprising a clamping element 7 which can be clamped to an upper side of the music stand and is designed to hold a lighting element 6 . In addition, the device has a recess 27 for receiving a part of the music stand, with the clamping element 7 being arranged in this area in order to clamp the device to a music stand.

CN 201827796 U discloses a street lamp, with a mast of the street lamp having a linear guide in order to arrange a lighting device at different heights. In addition, a handwheel is provided in order to be able to move the lighting device.

CN 108150869 A describes a traversing device for an LED lighting device. A precise application for this device is not disclosed, but the device comprises a toothed rack arranged on a carriage, on which the lighting device is arranged so that it can be moved in the vertical direction. In addition, a motor should be provided for automatically moving the lighting device.

At concerts, such as those found in large concert halls, but also on smaller stages or as accompaniments in television shows, it is common for the musicians to sit in darkened areas for reasons of atmosphere or the show. Therefore, there should be separate lighting for the notes.

In addition, the musicians often have the problem that the notes are not illuminated over the entire surface. At the same time, they have little time and often only one hand free to place the notes or adjust the lighting accordingly.

The same applies to blueprints on construction sites, the maintenance of control cabinets and other applications that require a uniform illumination of surfaces over the whole area.

The invention is based on the object of providing a lighting device and a music stand with such a lighting device with which an object can be effectively illuminated and which is easy to handle.

A further object of the present invention is to provide a lighting device and a music stand with such a lighting device with which a predetermined area can be variably illuminated.

The object is solved by the subject matter of the independent patent claims 1 and 10. Advantageous refinements of the invention are specified in the respective dependent claims.

An illumination device according to the present invention comprises an illumination device for illuminating an object, an arm having the illumination device, the illumination device being arranged approximately parallel to the arm, and a position adjustment device having a linear guide device, the arm and the illumination device being moved along by means of the position adjustment device a linear axis of the linear guide device are translationally displaceable and wherein the arm is arranged orthogonally to the linear axis.

The lighting device is characterized in that the position adjustment device has at least one gear wheel or a pawl and at least one toothed rack are meshingly engaged with each other, that a position of the arm (3) can be fixed along the linear axis, this position being referred to as the fixing position.

In addition, the lighting device is characterized by the linear guide device, which enables an exact adjustment and positioning of the lighting device along the linear direction.

The fact that the lighting device has an arm with the lighting device and a position adjustment device with a linear guide device, the arm and the lighting device being translationally displaceable by means of the position adjustment device along a linear axis of the linear guide device and the arm being arranged orthogonally to the linear axis, the lighting device enables an optimal and Almost complete illumination for flat, roughly rectangular areas or object areas or workplaces.

Workplace lighting or lighting devices that move along with the work area or that can be flexibly used and arranged no longer require a number of lighting devices in order to cover the areas to be illuminated. In this way, a significant proportion of energy costs can be saved.

In addition, the lighting device according to the invention has a simple and stable structure and is safe and reliable to use.

If only one rack is provided, the structure of the device is simpler, similar to a rack and pinion gear such as in an old steering gear of a vehicle with only one rack.

The lighting device is provided for illuminating a planar, approximately rectangular surface or object surface. In the sense of the invention, this object surface can be, for example, a music support surface with two adjacent sheets of music or an open book of music. In principle, the lighting device can be suitable for all object surfaces that are of a similar size and nature.

Thanks to the position adjustment device, a user has the option of quickly and easily adjusting and variably aligning the lighting device according to his needs.

An application example for the lighting device according to the invention is briefly presented below in order to explain the advantages. In the further course of the description, a large number of further application examples for the lighting device are disclosed.

For example, musicians often need separate lighting for the notes when they are sitting in darkened areas. This is common, for example, in large concert halls, but also on smaller stages or as accompaniments in television shows, for reasons of atmosphere or the show.

In addition, there is often the problem that the notes cannot be illuminated over their entire surface, since otherwise other areas of the environment would also be illuminated. At the same time, musicians have little time and often only one hand free to place the notes or adjust the lighting accordingly.

With the lighting device, the entire note support surface can be illuminated simultaneously and permanently, or any areas of the note support surface can be illuminated. In order to achieve this, the arm with the lighting device is elongate and extends approximately along the entire width of the sheet music support surface. By means of the position adjustment device, the arm can be linearly displaced as desired along the linear axis, in or against the linear direction. The linear direction is a direction perpendicular to the arm and parallel to the sheet music surface. In principle, it is also possible to attach the arm in such a way that it extends along the length of the sheet music support surface.

However, the lighting device according to the invention is suitable for a large number of areas of application, such as, for example, workplaces in the

- Manufacturing (production lines)

- precision mechanics

- Analysis (laboratory)

- Body related services (massage, tattoo studio / beauty treatments, etc...)

- Medical technology (biomedicine / radiology / diagnosis)

- Gallery / art houses / exhibitions (always different exhibits and exhibition objects can be illuminated by the lighting device.)

-Table lamp

- Library / archive store

- Service light

- control cabinets

- workbenches

The position adjustment device can have at least one gearwheel and at least one toothed rack, which mesh with one another in such a way that a position of the arm can be fixed along the linear axis, this position being referred to as the fixing position.

Alternatively, the lighting device can also have a spring-loaded pawl, which engages with the toothed rack in such a way that a position of the arm can be fixed along the linear axis, this position being referred to as the fixing position

Since the arm is fixed in the fixed position by means of the gear wheel or the pawl, the position of the arm is safely and reliably prevented from being shifted in the event of an accidental touch.

The position adjustment device can have an actuating button which is connected to the gearwheel, with the gearwheel being able to be disengaged from the toothed rack by actuating the actuating button and being able to be brought from the fixing position into a release position, so that the lighting device can be displaced along the linear axis.

It is possible to disengage the gear wheel from the at least one toothed rack by means of the actuating button. This is accomplished by pulling the actuator knob orthogonally to the linear direction. If the actuating button is held in this release position and moved in the linear direction, then the lighting device is only guided by the linear guide device. It is thus quickly a rough adjustment of the Illumination device in linear direction possible. While the toothed wheel is out of engagement with the toothed rack, the linear guide device ensures that the arm is guided appropriately and that it is sufficiently stable.

The operating button can be operated by a user with one hand. It can thus be operated by a musician who is holding his instrument in the other hand at the same time.

By rotating the actuating knob, the gear wheel can be rotated in such a way that the lighting device can be linearly displaced along the linear axis and/or that the arm and the lighting device can be rotated about an axis of rotation of the arm that is arranged orthogonally to the linear axis.

If the gear wheel is brought back into engagement with the at least one toothed rack by means of the actuating button, then the actuating button is again in the fixing position. In this fixing position, the gear wheel can be moved along the toothed rack by turning the actuating knob. A fine adjustment of the lighting device in the linear direction is thus possible. In this case, it can be provided that the connection between the toothed wheel and the toothed rack is designed to be self-locking in such a way that accidental adjustment by touching the lighting device is prevented.

At the same time, it is possible, both in the release position and in the fixing position, to rotate the lighting device about an axis of rotation of the arm, which is arranged orthogonally to the linear axis, by rotating the actuating knob. It is thus possible to rotate the lighting device about the axis of rotation while the lighting device is simultaneously being moved in the linear direction. In the release position, the lighting device can also be rotated about the axis of rotation without being moved in the linear direction at the same time.

The arm can be rotated in such a way that illumination is possible from the front side of the object surface as well as from an opposite side. In addition, the angle of incidence of the illumination device onto the object surface can be adjusted by rotating about the axis of rotation.

The pawl can be coupled directly to the arm and can be actuated by it in such a way that the pawl can be disengaged from the toothed rack by rotating the arm about its axis of rotation and can be brought from the fixing position into a release position, so that the lighting device can be moved along the linear axis is movable.

The spring-loaded pawl can be rigidly connected to the arm in such a way that the pawl can be disengaged from the toothed rack by rotating the arm about its axis of rotation. After the lighting device or the lighting device has been correctly positioned or has been moved to the desired position in the linear direction along the linear axis, a user can let go of the arm, the spring automatically re-engaging the pawl with a tooth of the toothed rack . In this way, the lighting device can be arranged in the desired position with little effort.

The lighting device can have a fastening device for the preferably manually releasable connection to an object that is to be illuminated or that is provided for receiving an object to be illuminated. Such a fastener will referred to as a manual releasable fastener. In this case, preferably no tool is required or the fastening device can be actuated without tools.

The fastening device can have one or more quick-release mechanisms or screw clamp-like fasteners or a magnetic strip or be designed to be magnetic in some areas or have similar fasteners such as at least one T-nut with clamping lever (can be connected to construction rails), at least one clip connection (mounting clips) that provide a safe, reliable and releasable connection to an object that is to be illuminated or is provided for receiving an object to be illuminated.

By means of the fastening device, the lighting device can be connected to different objects or items that are to be illuminated or that are provided for receiving an object to be illuminated. In this way, the number of light sources can be reduced in a wide variety of areas. The lighting device is therefore flexible in use and suitable for a wide variety of applications.

The actuating button can also be coupled to the gear wheel via a spring, with a spring force of the spring holding the gear wheel in meshing engagement with the toothed rack, and preferably holding the actuating button in the fixing position.

Since the actuating button is held in the fixing position by means of the spring, it is avoided that the gearwheel unintentionally disengages from the toothed rack.

Furthermore, the actuating button can simply be released after a rough adjustment and does not have to be pressed in again. The spring ensures that the gear takes an exact position between the racks.

The linear guide device can comprise at least one guide roller and at least one guide rail on which the guide roller is linearly guided.

In this way, safe and reliable guidance of the arm and the lighting device is achieved.

The position adjustment device can have a profile-like housing with a functional space that extends along the linear axis, with two toothed racks being arranged parallel and spaced apart from one another in the functional space, and the gear wheel being arranged between the two toothed racks and meshing with them, and with in the functional space two guide rails are arranged parallel and spaced apart from each other and a guide roller or preferably two guide rollers are arranged between the two guide rails.

The housing protects the components of the position adjustment device from external influences, such as impacts or dust. In this way, high functional accuracy and a long service life are achieved.

The arm may include a first sub-arm which is connected to the position adjustment device and which extends in the direction of the rotation axis orthogonally to the linear axis, a second sub-arm which is connected to the first sub-arm and arranged orthogonally thereto, and a third sub-arm which connected to the second sub-arm and arranged orthogonally thereto and which has the lighting device, wherein the first sub-arm and the third sub-arm are arranged parallel and offset to one another, and wherein the first and the third sub-arm are activated by a rotary movement of the actuating knob about the axis of rotation of the arm can be rotated so that the lighting device can be pivoted in rotation.

The lighting device is integrated into the third partial arm, as a result of which it rotates about the axis of rotation at a distance which corresponds to the length of the second partial arm. Thus, by rotating the arm about the axis of rotation, the angle of incidence and the distance between the lighting device and the object surface can be adjusted.

The third sub-arm can preferably be connected to the second sub-arm such that it can rotate about its longitudinal axis.

Due to the fact that the third sub-arm can be rotated about its own longitudinal axis, the lighting device can be rotated without rotating the actuating button. It is thus possible to simply rotate the lighting device while the position of the lighting device in the linear direction has already been selected.

According to this particularly preferred embodiment, the angle of incidence and the distance between the illumination device and the object surface can be adjusted independently of one another by rotating the arm about the axis of rotation on the one hand and rotating the partial arm about its longitudinal axis on the other.

The lighting device can be in the form of an LED lighting device or rail.

Of course, other lighting means can also be provided for the lighting device. In particular, lighting means with different color temperatures can be provided in order to offer the user a light that is as pleasant as possible for the eyes in the dark environment.

Additionally and/or alternatively, the position adjustment device can also be designed with an electric linear drive for automatic adjustment.

An electric linear drive enables precise adjustment of the arm and the lighting device.

Furthermore, a music stand with a lighting device as explained above is provided according to the present invention, comprising a base and a music support which is firmly connected to the base and which has a music support surface which is designed to accommodate one or more sheets of music, the lighting device on the touch support surface can be attached so that it is illuminated by the lighting device.

The invention is described below with reference to an embodiment shown in the figures. These show in: 1 shows a schematic representation of a music stand with a lighting device according to the invention; in

2 shows a schematic representation of the lighting device according to the invention in a perspective view; in

3 shows a schematic representation of the lighting device according to the invention in a further perspective view; in

4 shows a detailed illustration of the lighting device according to the invention; in

5 shows a detailed illustration of the lighting device according to the invention in a further view; in

6 shows a detailed illustration of a position adjustment device of the lighting device according to the invention; in

7 shows an exploded view of the lighting device according to the invention; in

8 shows a schematic representation of the lighting device according to the invention according to a second exemplary embodiment in a perspective view; in

9 shows a schematic illustration of the lighting device according to the invention according to the second exemplary embodiment in a further perspective view; in

10 shows a detailed representation of the lighting device according to the invention in accordance with the second exemplary embodiment; in

11 shows a detailed illustration of the lighting device according to the invention according to the second exemplary embodiment in a further view; in

12 shows a detailed illustration of a position adjustment device of the lighting device according to the invention according to the second exemplary embodiment; in

13 shows a perspective exploded view of the lighting device according to the invention according to a third embodiment; in

14 is a side view of the lighting device according to the third embodiment; in

15 shows another side view of the lighting device according to the third exemplary embodiment; in

16 is a partially cutaway plan view of the lighting device according to the third embodiment; in

17 shows a further perspective illustration of the lighting device according to the third exemplary embodiment; in

18 shows another side view of the lighting device according to the third exemplary embodiment; and in 19 shows a work table with an object to be illuminated and an illumination device according to the invention.

A lighting device 1 according to the invention is described in more detail below using an exemplary embodiment (FIGS. 1-7).

The lighting device 1 according to the invention comprises a position adjustment device 2 and an arm 3 which has a lighting device 4 .

The position adjustment device 2 comprises a housing 5. The housing 5 is designed as an elongate profile with an approximately rectangular cross section. It has four walls extending approximately in a linear direction 6 .

The lighting device 1 can be arranged on a music stand 33 or connected to it via a first guide wall 9 . Appropriate fastening means can be provided for this purpose (not shown).

A second guide wall 10 is arranged opposite the first guide wall 9 .

The first guide wall 9 and the second guide wall 10 are connected to one another via a first end wall 11 and a second end wall 12 .

Only wall sections 13 are provided in the area between the first guide wall 9 and the second guide wall 10, with the wall sections 13 in the area of the arm 3 forming a displacement recess 14 extending in the linear direction 6, in which the arm 3 can be displaced in the linear direction 6.

In a region of the profile opposite the displacement recess 14 there is an adjustment recess 15 which extends in the linear direction 6 and is also delimited by wall sections 13 .

The first guide wall 9, the second guide wall 10, the first end wall 11 and the second end wall 12 delimit a functional space 16.

In the functional space 16, two racks 17, 18 are arranged. A first rack 17 is connected to the first guide wall 9 and extends parallel to the linear direction 6. A second rack 18 is connected to the second guide wall 10 and also extends parallel to the linear direction 6. The two racks 17, 18 are arranged opposite one another. The toothed racks 17, 18 are preferably arranged directly adjacent to the second end wall 12.

Two guide rails 19, 20 are spaced from the two racks 17, 18 in the functional space 16 arranged. A first guide rail 19 is connected to the first guide wall 9 and extends parallel to the linear direction 6. A second guide rail 20 is connected to the second guide wall 10 and also extends parallel to the linear direction 6. The two guide rails 19, 20 are arranged opposite one another.

A shaft section 21 extends orthogonally to the linear direction 6 along an axis of rotation 8 through the displacement recess 14 into the housing 5. The shaft section 21 runs along the axis of rotation 8 through the housing 5 and extends through the adjustment recess 15 into an area outside the housing 5. A gear wheel 22 is arranged on the shaft section 21 in the area of the toothed racks 17 , 18 . The gear wheel 22 is connected to the shaft section 21 in a rotationally fixed manner. The gear wheel 22 is arranged between the two toothed racks 17, 18 in such a way that it meshes with them. The gear 22 is rotatably received between the toothed racks 17, 18 and is translationally displaceable in the linear direction 6.

The toothed racks 17, 18 and the gearwheel 22 can be designed magnetically, so that the gearwheel 22 is additionally held in engagement with the toothed racks 17, 18 by a magnetic force.

Two guide rollers 23 are coupled to the shaft section 21 in the area of the guide rails 19 , 20 . The guide rollers 23 are connected to one another in the area of their axes of rotation by means of two connecting pieces 24 . Each connecting piece 24 has a through opening 25 in a region between the guide rollers 23 . The shaft portion 21 extends through the through hole 25 of the connector 24. In this way, the shaft portion 21 is rotatably supported and slidably coupled to the guide rollers 23.

The guide rollers 23 are arranged one behind the other in the linear direction 6 and are guided between the two guide rails 19 , 20 . The guide rollers 23 are thus rotatably accommodated between the guide rails 19, 20 and can be displaced in a translatory manner in the linear direction 6.

The two guide rails 19, 20 and the two guide rollers 23 together form a linear guide device 50.

A spring 26 surrounding the shaft section 21 is provided between the toothed wheel 22 and the guide rollers 23 . In a fixing position, in which the gear wheel 22 is in meshing engagement with the toothed racks 17, 18, the spring 26 is in a relaxed state. The spring 26 acts on the gear wheel 22 with a corresponding spring force in such a way that it is held in engagement with the toothed racks 17, 18 and thus in the fixing position.

At the same time, the connecting piece 24 forms a stop for the spring 26 opposite the gearwheel 22 . The spring 26 is a coil spring, for example.

An actuating button 27 is arranged on that part of the shaft section 21 which extends through the adjustment recess 15 into an area outside the housing 5 . The actuating knob 27 is preferably a rotary knob with a profile that can be easily gripped with the fingers.

According to this exemplary embodiment, the following components are arranged one after the other along the shaft section 21: the operating button 27, the guide rollers 23 and the gear wheel 22.

The shaft section 21 can be pulled along the axis of rotation 8 against the spring force of the spring 26 with the actuating button 27 . The shaft portion 21 is slid through the through hole 25 of the connector 24 . Since the gear wheel 22 is connected to the operating button 27 via the shaft section 21, this is brought out of engagement with the toothed racks 17, 18.

By releasing the actuating button 27, the gear wheel 22 is brought back into engagement with the toothed racks 17, 18 by the spring 26. The first end wall 11 serves as a stop wall for the actuating button 27. The racks 17, 18 and the gear 22 are preferably chamfered in such a way that the gear 22 moves directly back into engagement with the racks 17, 18 when the actuating button 27 is released. There is no intermediate position possible in which the teeth of the gear 22 hit the teeth of the racks 17, 18 and block each other.

The shaft section 21 is rigidly coupled to a first partial arm 28 of the arm 3 outside of the housing 5 in a region of the displacement recess 14 . A coupling 38 of the shaft section 21 to the first partial arm 28 is preferably a suitable plug connection. The coupling 38 can be a frictional connection. For example, the partial arm 28 has a pin and the shaft section 21 has a corresponding recess into which the pin can be pushed with a force fit. The partial arm 28 is arranged along the axis of rotation 8 .

A second arm part 29 is connected to the first arm part 28 outside the housing. The second partial arm 29 is arranged orthogonally to the first partial arm 28 .

The second partial arm 29 is connected to a third partial arm 30 . The third partial arm 30 is in turn arranged orthogonally to the second partial arm 29 and is thus arranged parallel to the first partial arm 28 and offset by the length of the second partial arm 29 to the first partial arm 28 . The third partial arm 30 has the lighting device 4 .

The lighting device 4 is preferably an LED bar that is integrated into the third partial arm 30 . A beam angle of the LED rail is approximately 100° or approximately 120° or approximately 140°.

At the connection between the second arm part 29 and the third arm part 30 a swivel joint 31 is attached. The swivel joint 31 allows the third arm part 30 to rotate about its own axis.

A method according to the invention of the lighting device 1 described above is explained in more detail below.

In the fixing position, rotating the actuating button 27 causes the shaft section 21 to rotate, with the shaft section 21 rotating about the axis of rotation 8 .

Since the shaft section 21 is firmly connected to the gear wheel 22, the gear wheel 22 rotates with it and moves between the toothed racks 17, 18 in the linear direction 6.

At the same time, the shaft section 21 moves in the linear direction 6. Since the shaft section 21 is coupled to the guide rollers 23, it is guided by the guide rollers 23 along the guide rails 19, 20.

The first partial arm 28 of the arm 3 is firmly connected to the shaft section 21 . As a result, the arm 3 rotates about the axis of rotation 8 and moves translationally in the linear direction 6.

This translational movement of the arm 3 in the fixing position can be referred to as fine adjustment, since moving the gear wheel 22 between the toothed racks 17, 18 enables step-by-step adjustment in the linear direction 6. By actuating the actuating knob 27, the actuating knob 27 is transferred from the fixing position to a release position. In the process, the actuating button 27 is pulled away from the housing 5 of the position setting device 2 along the axis of rotation 8 .

Due to the connection of the operating knob 27 to the gear 22 via the shaft portion

21, the gear 22 is disengaged from the racks 17, 18.

At the same time, the spring 26, which is located between the gear wheel 22 and the connecting piece 24 of the guide rollers 23, is compressed.

In this release position, the shaft section 21 with the arm 3 is guided solely by the guide rollers 23 in the guide rails 19, 20 and the arm 3 can be moved in a translatory manner by moving the actuating button 27 in the linear direction 6 or can be moved linearly in the linear direction 6 .

This translational movement of the arm 3 in the release position can be referred to as coarse adjustment, since the arm 3 can be moved quickly in the linear direction 6 .

In the release position, the actuating button 27 and thus the arm 3 can continue to be rotated about the axis of rotation 8 . With this rotation of the arm 3 in the release position, the gear wheel moves

22 not between the racks 17, 18, whereby no movement of the arm 3 in the linear direction 6 is effected. The arm 3 can thus be rotated independently of a movement in the linear direction 6 .

In order to transfer the actuating knob 27 and the gearwheel 22 from the release position to the fixing position again, the actuating knob 27 simply has to be released again.

The spring force of spring 26 forces gear wheel 22 back into meshing engagement with toothed racks 17, 18.

The first end wall 11 serves as a stop wall for the actuating button 27, so that the gear wheel 22 cannot slip out of engagement on the side of the toothed racks 17, 18 opposite the spring 26.

The lighting device 1 has a fastening device (not shown) for the preferably releasable connection to an object that is to be illuminated or is provided for receiving an object to be illuminated.

The fastening device can have one or more quick-release mechanisms or screw clamp-like fastening means or the like, which comprise a safe, reliable and releasable connection with an object that is to be illuminated or is provided for receiving an object to be illuminated.

A second embodiment is described below (Figs. 8-12). Identical parts have the same reference numbers as in the previous exemplary embodiment. In addition, the above explanations apply equally to the parts of the further embodiment. Unless otherwise described, the lighting device according to the second exemplary embodiment has the same technical features as the lighting device according to the first exemplary embodiment.

The second embodiment differs from the previous embodiment in that no operating button 27 for adjusting the lighting device 4 along the Linear axis 7 is provided and that the first end wall 11 has no adjustment recess 15. Furthermore, in the further exemplary embodiment, the arm 3 is designed in one piece and no longer has any partial arms.

The lighting device 1 includes the position adjuster 2 and the arm 3 having the lighting device 4 .

The position adjustment device 2 comprises the housing 5. The housing 5 is designed as an elongate profile with an approximately rectangular cross section.

The housing 5 has the first guide wall 9 extending approximately in the linear direction 6 , the second guide wall 10 being arranged opposite the first guide wall 9 .

The first guide wall 9 and the second guide wall 10 are connected to one another via the first end wall 11 and the second end wall 12 .

Only the wall sections 13 are provided in the second end wall 12 , the wall sections 13 in the region of the arm 3 forming the displacement recess 14 which extends in the linear direction 6 and in which the arm 3 can be displaced in the linear direction 6 .

The first guide wall 9, the second guide wall 10, the first end wall 11 and the second end wall 12 delimit the functional space 16.

In the functional space 16, the two guide rails 19, 20 are arranged. The first guide rail 19 is connected to the first guide wall 9 and extends parallel to the linear direction 6. The second guide rail 20 is connected to the second guide wall 10 and also extends parallel to the linear direction 6. The two guide rails 19, 20 are arranged opposite one another.

The two toothed racks 17, 18 are spaced apart from the two guide rails 19, 20 in the functional space 16. The first rack 17 is connected to the first guide wall 9 and extends parallel to the linear direction 6. The second rack 18 is connected to the second guide wall 10 and also extends parallel to the linear direction 6. The two racks 17, 18 are arranged opposite one another.

The shaft section 21 extends orthogonally to the linear direction 6 along an axis of rotation 40 through the displacement recess 14 into the housing 5. The shaft section 21 runs along the axis of rotation 40 through the housing 5 and ends in an area near the first end wall 11 within the housing 5.

A bushing 39 is coupled to the shaft section 21 within the functional space 16 directly adjacent to the displacement recess 14 . The bushing 39 has a through opening (not shown) in the area of its axis of rotation. The shaft portion 21 extends through the through hole of the bushing 39. In this way, the shaft portion 21 is rotatably supported and slidably coupled to the bushing 39. As shown in FIG. The bushing 39 can be displaced translationally in the linear direction 6 with the shaft section 21 .

The bushing 39 is designed so that it is not possible to reach into the functional space 16 with the finger in the region of the shaft section 21 and protects a user from pinching his finger. The two guide rollers 23 are coupled to the shaft section 21 in the area of the guide rails 19 , 20 . The guide rollers 23 are connected to one another in the region of their axes of rotation by means of the connecting piece 24 . The connecting piece 24 has the through opening 25 in a region between the guide rollers 23 . The shaft portion 21 extends through the through hole 25 of the connector 24. In this way, the shaft portion 21 is rotatably supported and slidably coupled to the guide rollers 23.

The gear wheel 22 is arranged on the shaft section 21 in the area of the toothed racks 17 , 18 . The gear wheel 22 is connected to the shaft section 21 in a rotationally fixed manner. The gear wheel 22 is arranged between the two toothed racks 17, 18 in such a way that it meshes with them. The gear 22 is rotatably received between the toothed racks 17, 18 and is translationally displaceable in the linear direction 6.

The spring 26 surrounding the shaft section 21 is provided between the guide rollers 23 and the gear wheel 22 . In the fixing position, in which the gear wheel 22 is in meshing engagement with the toothed racks 17, 18, the spring 26 is in a relaxed state. The spring 26 acts on the gear wheel 22 with a corresponding spring force in such a way that it is held in engagement with the toothed racks 17, 18 and thus in the fixing position.

At the same time, the connecting piece 24 forms a stop for the spring 26 opposite the gearwheel 22 .

According to this further exemplary embodiment, the following components are arranged one after the other along the shaft section 21: the gear wheel 22, the guide rollers 23 and the bushing 39.

The shaft section 21 is rigidly coupled to the arm 3 outside the housing 5 in a region of the displacement recess 14 . The arm 3 is arranged along the axis of rotation 40 and has the lighting device 4 .

The shaft section 21 can be pulled along the axis of rotation 40 against the spring force of the spring 26 with the arm 3 . The shaft portion 21 is slid through the through hole of the bush 39 and the through hole 25 of the connector 24 . Since the gear wheel 22 is connected to the arm 3 via the shaft section 21, this is brought out of engagement with the toothed racks 17,18.

By releasing the arm 3, the gear wheel 22 is brought back into engagement with the toothed racks 17, 18 by the spring 26.

The coupling 38 between the shaft section 21 and the arm 3 can be designed in such a way that the arm 3 can be rotated about the axis of rotation 40 independently of the shaft section 21 .

A method for the further exemplary embodiment described above is explained in more detail below. The arm 3 is fixedly coupled to the shaft portion 21 . In the fixing position, rotating the arm 3 causes the shaft section 21 to rotate, with the shaft section 21 rotating about the axis of rotation 40 .

Thus, the arm 3 moves translationally in the linear direction 6.

This translational movement of the arm 3 in the fixing position can be referred to as fine adjustment, since moving the gear wheel 22 between the toothed racks 17, 18 enables step-by-step adjustment in the linear direction 6.

By pulling on the arm 3, the gear wheel 22 is transferred from the fixing position to the release position. The arm 3 is pulled away from the housing 5 of the position adjustment device 2 along the axis of rotation 40 .

Due to the connection of the arm 3 to the gear 22 via the shaft portion 21, the gear 22 is disengaged from the racks 17,18.

At the same time, the spring 26, which is located between the connecting piece 24 of the guide rollers 23 and the gear wheel 22, is compressed.

In the release position, the arm 3 can continue to be rotated about the axis of rotation 40 . With this rotation of the arm 3 in the release position, the toothed wheel 22 does not move between the racks 17, 18, as a result of which no movement of the arm 3 in the linear direction 6 is caused. The arm 3 can thus be rotated independently of a movement in the linear direction 6 .

In order to move the arm 3 and the gear 22 back from the release position to the fixing position, the arm 3 simply has to be released again.

A lighting device 1 according to the invention according to a third exemplary embodiment is explained below (FIGS. 13-18).

The lighting device 1 according to the third exemplary embodiment essentially corresponds to the two lighting devices 1 described above, unless otherwise stated is described, the lighting device 1 according to the third embodiment has the same technical features as the lighting devices 1 according to the first and the second embodiment. The same technical features are provided with the same reference symbols.

In the lighting device 1 according to the third exemplary embodiment, the first partial arm 28 is connected to the arm 3 or the third partial arm 30 along the axis of rotation in an approximately linear manner or at a slight angle.

A pawl 42 loaded with a spring 41 is provided in the area of the connecting piece 24 of the linear guide device and the arm 3 .

A first semi-tubular section 43 with a groove extending in a direction of rotation about the axis of rotation 8 is integrally formed on an end of the first partial arm 28 pointing in the direction of the lighting device 4 . This section extends through the through opening 25 of the first connecting piece 24 in the direction of the arm 3.

A corresponding end of the arm 3 is intended to be located in the first semi-tubular section 43 . For this purpose, the arm 3 has a cylindrical fastening section 45 with a radially circumferential web.

The cylindrical fastening section 45 can be arranged in the first semi-tubular section 43 in such a way that the radially circumferential web 46 is arranged in the groove.

A second semi-tubular section 47 is designed to correspond to the first semi-tubular section 43 and is designed as an independent component. The second semi-tubular section 47 also has a second groove 48 . In this way, there is a non-rotatable connection between the first partial arm 28 and the third partial arm 30 or the arm 3.

Alternatively, the non-rotatable connection between the first and the third partial arm can also be realized by means of a quick-release plug connection,

A casing wall 49 of the first semi-tubular section 43 and the second semi-tubular section 47 forms both a receiving section for the spring 41 and for the pawl 42, the pawl 42 being connected to the first partial arm 28 in a torque-proof manner.

In the area between the pawl 41 and the connecting piece 24 the spring 41 or a torsion spring or a spiral spring is arranged, which is connected both to the connecting piece 24 and to the pawl 42 .

In this way, the pawl or a corresponding latching tooth of the pawl can be disengaged from the teeth of the first toothed rack 17 by rotating the arm 3 or the third partial arm 30 or the lighting device 4 about the axis of rotation 8 .

The lighting device 4 can then be moved and positioned in the linear direction 6 . As soon as no more torque is applied to the lighting device 4 or the third partial arm 30, the latching tooth of the pawl 41 is brought back into engagement with the toothing of the first toothed rack 7 by the arm 3 or third partial arm 30 which has been subjected to a spring force by the spring 41 , so that the lighting device 1 is fixed in the linear direction 6 .

According to this embodiment, only a single first rack 17 is provided. The linear guide device 50 otherwise corresponds to the linear guide device described above.

A music stand 32 with the lighting device 1 explained above is described in more detail below.

The music stand 32 comprises a base 33 and a music rest 34.

The sheet music support 34 has a rectangular sheet music support surface 35 which is designed to hold sheets of music or a music book 36 .

A note holder 37 which extends approximately in the horizontal direction and which prevents the sheets of music 36 from falling is arranged on the note support 34 perpendicularly to the note support surface 35 .

The lighting device 1 can be arranged via the first guide wall 9 on the music support surface 35 of the music stand 32 or can be connected to it by means of a corresponding fastening means. The fastening means can be a magnet holder or a screw connection.

The lighting device 1 can be arranged in a lateral edge area of the note support surface 35 in such a way that the housing 5 is arranged orthogonally to the note holder 37 and the third partial arm 30 can be displaced parallel to the note holder 37 in the linear direction 6 .

In the above-mentioned exemplary embodiments, two racks 17, 18 are provided for guiding the gear wheel 22 and two guide rails 19, 20 for guiding the guide rollers 23. In principle, it is also possible to provide only one toothed rack or one guide rail.

In the above embodiments, two guide rollers 23 are provided, which are connected to the connecting piece 24 and which guide the shaft section 21 . However, it is also possible to provide only one guide roller, which has a through-opening in the region of its axis of rotation. The shaft section 21 then extends through the through opening of this one guide roller. In this way, the shaft section 21 is rotatably mounted and displaceably coupled to this guide roller and can be displaced translationally in the linear direction 6 .

Additionally and/or alternatively, the position adjustment device can also be designed with an electric linear drive for automatic adjustment. A linear motor can be provided which drives the linear guide device. As a result, the arm 3 with the lighting device 4 can be moved translationally in the linear direction 6 . A corresponding switch can be provided on the lighting device 1, which enables activation of the linear motor. There are preferably two switches which allow the arm 3 with the lighting device 4 to be moved in both directions.

In the exemplary embodiments mentioned above, the lighting device 1 is provided for the music stand 32 and for lighting the music support surface 35 . The lighting device 1 can also be provided for any surfaces or objects to be illuminated, for example also for distributors, plan holders, whiteboards, standing or office tables. For this purpose, the size of the lighting device 1 is adapted according to the size of the area to be illuminated. reference list

1 lighting device

2 position adjustment device

3 arms

4 lighting device

5 housing

6 linear direction

7 linear axis

8 axis of rotation

9 first guide wall

10 second guide wall

11 first end wall

12 second end wall

13 wall section

14 sliding recess

15 adjustment recess

16 function room

17 first rack

18 second rack

19 first guide rail

20 second guide rail

21 shaft section

22 gear

23 Leadership

24 connector

25 through hole

26 spring

27 actuation button

28 first partial arm

29 second partial arm

30 third partial arm

31 pivot

32 music stands

33 stand

34 note pad

35 note support surface

36 sheets of music/music book

37 sheet music holder

38 pairing

39 socket

40 axis of rotation

41 spring

42 pawl

43 first semi-tubular section

44 first groove

45 cylindrical mounting portion

46 footbridge

47 second semi-tubular section

48 second groove

49 jacket wall

50 linear guide device

Claims

patent claims

1. Lighting device (1), comprising an illumination device (4) for illuminating an object, an arm (3) having the illumination device (4), wherein the illumination device (4) is arranged approximately parallel to the arm (3) and a Position adjustment device (2) with a linear guide device, the arm (3) and the lighting device (4) being translationally displaceable by means of the position adjustment device (2) along a linear axis (7) of the linear guide device, and the arm (3) orthogonal to the linear axis (7) is arranged, wherein the position adjustment device (2) has at least one toothed wheel (22) or a pawl (42) and at least one toothed rack (17, 18) which mesh with one another in such a way that a position of the arm (3) along the Linear axis (7) can be fixed, this position being referred to as the fixing position.

2. Lighting device (1) according to claim 1, characterized in that the position adjustment device (2) has an actuating button (27) which is connected to the gear wheel (22), wherein by actuating the actuating button (27) the gear wheel (22) can be disengaged from the toothed rack (17, 18) and can be brought from the fixing position to a release position, so that the lighting device (4) can be displaced along the linear axis (7) and the gearwheel preferably being actuated by rotating the actuating button (27). (22) can be rotated in such a way that the lighting device (4) can be linearly displaced along the linear axis (7) and/or that the arm (3) and the lighting device (4) can be rotated about an axis of rotation (8) of the arm (3), which is arranged orthogonally to the linear axis (7), are rotatable.

3. Lighting device (1) according to claim 1 or 2, characterized in that the actuating button (27) via a spring (26) is coupled to the gear (22), wherein a spring force of the spring (26) the gear (22) in meshing engagement with the rack (17, 18), and preferably holds the operating knob (27) in the fixing position.

4 Lighting device (1) according to claim 1, characterized in that the pawl (42) is coupled directly to the arm (3) in such a way that by rotating the arm (3) about its axis of rotation (8) the pawl (42) except Can be brought into engagement with the toothed rack (17, 18) and can be brought from the fixing position into a release position, so that the lighting device (4) can be displaced along the linear axis (7).

5. Lighting device (1) according to one of claims 1 to 4, characterized in that the linear guide device comprises at least one guide roller (23) and at least one guide rail (19, 20) on which the guide roller (23) is linearly guided.

6. Lighting device (1) according to one of claims 1 to 5, characterized in that the position adjustment device (2) has a profile-like housing with a functional space (16) which extends along the linear axis (7), wherein in the functional space (16) two toothed racks (17, 18) are arranged parallel and at a distance from one another and the gear wheel (22) is arranged between the two toothed racks (17, 18) and is in meshing engagement with them, and with two guide rails (19, 20) are arranged parallel and at a distance from one another and a guide roller (23) or preferably two guide rollers (23) are arranged between the two guide rails (19, 20).

7. Lighting device (1) according to one of claims 1 to 6, characterized in that the arm (3) has a first partial arm (28) which is connected to the position adjustment device (2) and which extends in the direction of the axis of rotation (8) orthogonally to the linear axis (7), a second sub-arm (29) connected to and orthogonal to the first sub-arm (28) and a third sub-arm (30) connected to and orthogonal to the second sub-arm (29). is arranged and which has the lighting device (4), wherein the first partial arm (28) and the third partial arm (30) are arranged parallel and offset to one another and wherein the first partial arm (28) and the third partial arm (30) are connected by a Rotational movement of the actuating button (27) can be rotated about the axis of rotation (8) of the arm (3), so that the lighting device (4) can be pivoted in rotation.

8. Lighting device (1) according to claim 7, characterized in that the third partial arm (30) is rotatably connected about its longitudinal axis to the second partial arm (29).

9. Lighting device (1) according to any one of claims 1 to 8, characterized in that the lighting device (4) is an LED bar.

10. Lighting device (1) according to one of claims 1 to 9, characterized in that the lighting device (1) has a fastening device for preferably releasable connection to an object which is to be illuminated or is provided for receiving an object to be illuminated.

11. Object which is to be illuminated or is provided for receiving an object to be illuminated, in particular a music stand (32) with an illumination device (1) according to one of Claims 1 to 9.

12. Article according to claim 11, comprising a base (33) and a sheet music support (34) which is fixedly connected to the base (33) and which has a sheet music support surface (35) which is suitable for receiving one or more sheet music (36). is formed, wherein the lighting device (1) can be attached to the note support surface (35) so that it is illuminated by the lighting device (4).