Lighting assembly for a handheld power tool, power tool assembly, and construction kit

Abstract

The invention relates to a lighting assembly (22) for selectively securing to a handheld power tool (12), in particular to a manually guided grinding machine. The lighting assembly (22) comprises a support unit (24) with a base portion (26) and two limbs (28, 30), said limbs (28, 30) extending from the base portion (26) on opposite sides. The base portion (26) and the two limbs (28, 30) thus define a receiving area (32) for receiving a part of the handheld power tool (10). The part is received in particular in a force-fitting and / or form-fitting manner. The lighting assembly (22) additionally comprises a lighting unit (40) with at least one light source (44) which is secured to the support unit (24). The invention also relates to a power tool assembly (10) comprising a handheld power tool (12), in particular a manually guided grinding machine, and such a lighting assembly (22) and to a construction kit which comprises a handheld power tool (12), such a lighting assembly (22), and a spacer assembly.

Description

[0001] Lighting assembly for a hand-held machine tool, machine tool assembly and kit

[0002] The invention relates to a lighting assembly for optional attachment to a hand-held power tool, in particular to a hand-held grinding machine.

[0003] Furthermore, the invention is directed to a machine tool assembly. The machine tool assembly comprises a hand-held power tool, in particular a hand-held grinding machine, which comprises a machine housing and a lighting assembly.

[0004] Furthermore, the invention relates to a kit comprising a hand-held power tool and a lighting assembly.

[0005] When working with a hand-held machine tool, particularly a hand-held grinding machine, the user of the hand-held machine tool must always have the workpiece to be machined in view, particularly in the vicinity of the machining zone. This is the only way to ensure accurate, high-quality work results. This is especially true when the hand-held machine tool is used in an environment with poor lighting conditions. With this in mind, hand-held machine tools are known that have lighting devices integrated into an associated machine housing. However, this is not the case with all hand-held machine tools. Therefore, if a user expects to have to work in poor lighting conditions, they must always ensure that they have the right hand-held machine tool available, i.e. a hand-held machine tool with integrated lighting devices.Against this background, the object of the present invention is to provide a simple and flexible method for illuminating a machining zone and / or the surroundings of a machining zone of a hand-held power tool. In particular, this method of illumination should be independent of the hand-held power tool used.

[0006] The problem is solved by a lighting assembly for selective attachment to a hand-held power tool, in particular to a hand-held grinding machine. The lighting assembly comprises a support unit with a base section and two legs. The legs extend from the base section on opposite sides. Thus, the base section and the two legs define a receiving space for receiving a section of the hand-held power tool. The receiving occurs in particular in a force-fitting and / or form-fitting manner. Furthermore, the lighting assembly comprises a lighting unit with at least one light source. The lighting unit is attached to the support unit. In other words, the base section and the two legs of the support unit form a mechanical interface of the lighting assembly, via which the lighting assembly can be attached to a hand-held power tool, in particular to a hand-held grinding machine.Since the two legs extend from the base section on opposite sides, the legs can also be referred to as side legs. When the section of the hand-held power tool is received in the receiving space, the two legs rest on different sides of the hand-held power tool and, in particular, laterally against the section of the hand-held power tool with respect to a main working direction. Due to the fact that the base section and the two legs are designed to receive the section of the hand-held power tool in the receiving space spanned by these elements, in particular to receive it in a force-fitting and / or form-fitting manner, the carrier unit can also be referred to as a clamp or clasp. Put simply, the design of the carrier unit allows the lighting assembly according to the invention to be clamped or fixed to the section of the hand-held power tool.In the case of a force-fitting and / or form-fitting mount, the section of the handheld power tool can be clamped between the two legs. Alternatively or additionally, the lighting assembly can also be screwed onto the handheld power tool, e.g., onto the housing of the handheld power tool. From a purely geometric perspective, the support unit can also be referred to as U-shaped or C-shaped. The base section forms a base of the U-shape or an upright section of the C-shape. The two legs accordingly form sections of the U-shape that project upwards from the base of the U-shape or sections of the C-shape that project to the right. The support unit is therefore structurally comparatively simple.In addition, such a carrier unit can be designed to be compatible with a variety of different hand-held power tools, in particular with a variety of different hand-held grinding machines. The lighting unit attached to the carrier unit can thus be easily and flexibly attached to a hand-held power tool. The light source serves to illuminate a processing zone and / or the area surrounding a processing zone. The light source can be operated to generally increase the brightness. Alternatively or additionally, the light source can be designed to generate a grazing light that falls at a relatively flat angle onto a workpiece to be machined using the hand-held power tool, so that defects and / or deficiencies in a work result, e.g., unevenness, scratches, and / or defects, can be easily identified by a user using the light source.

[0007] In the context of the present invention, the two legs can be the same size or different sizes. However, the two legs are preferably substantially the same size. Alternatively or additionally, the legs can extend in the same or different directions from the base section. The legs preferably extend in the same direction from the base section. Furthermore, alternatively or additionally, the legs can be substantially straight or substantially curved. Overall, a symmetrical arrangement and design of the legs is preferred, i.e. the legs are preferably the same size and extend in the same direction from the base section. This results in a symmetrical U-shape or C-shape. Other variants, in particular those resulting in an asymmetrical and / or distorted U-shape or C-shape, are also conceivable.

[0008] In the context of the present invention, a workpiece is understood to be an object that is being machined or is to be machined using the hand-held power tool. For example, the workpiece is a piece of furniture. The workpiece can also be a building element, e.g., a wall, a ceiling, or a supporting structure.

[0009] According to a preferred embodiment, the light source is embodied as a light-emitting diode (LED). Such a light source is compact and can also be operated in an energy-efficient manner. The LED can be embodied as a so-called chip-on-board (COB) LED. Alternatively or additionally, the LED can be embodied as a so-called surface-mounted device. Such a light source is particularly compact in design.

[0010] In a case in which the lighting assembly can be screwed to the hand-held power tool, in particular to a housing of the hand-held power tool, a screw connection that is used to assemble housing parts together can also be used to fasten the lighting assembly to the hand-held power tool. In this case, this screw connection serves both to fasten housing parts to one another and to fasten the lighting assembly to the hand-held power tool. Alternatively, a separate screw connection can be provided for fastening the lighting assembly. In particular, this screw connection is separate from a screw connection that is used to assemble housing parts together. In both variants, the lighting assembly can be reliably fastened to the hand-held power tool.

[0011] In a further alternative, the lighting assembly can be attached to the hand-held power tool by means of a band- or belt-shaped element. For this purpose, the band- or belt-shaped element can be placed around a portion of the housing of the hand-held power tool. The band- or belt-shaped element can be made of a metal material or a plastic material. It is also possible for the band- or belt-shaped element to comprise both metal material and plastic material. Optionally, a tightening mechanism is also provided, by means of which the band- or belt-shaped element can be tightened to fasten the lighting assembly to the hand-held power tool. In this way, the lighting assembly can be attached to the hand-held power tool particularly reliably.In addition, by tightening the band- or belt-shaped element, unwanted relative movement between the lighting assembly and the handheld power tool can be prevented or at least reduced. The tightening mechanism can, for example, comprise a screw, so that turning the screw tightens the band- or belt-shaped element. In this case, the lighting assembly can be attached to the handheld power tool like a pipe clamp. Overall, the lighting assembly can also be reliably attached to the handheld power tool using the band- or belt-shaped element.

[0012] According to one example, the base section has a base section outer surface facing away from the receiving space. In other words, the base section outer surface is provided on a side of the base section opposite the receiving space. Similarly, each of the two legs can have a leg outer surface facing away from the receiving space. This means that each leg outer surface is provided on a side of the base section opposite the receiving space. The base section outer surface and the leg outer surfaces are therefore oriented laterally when the lighting assembly is attached to a hand-held power tool. This distinguishes the base section outer surface and the leg outer surfaces from an underside of the lighting assembly, which is oriented towards a processing zone, i.e., towards a workpiece and / or towards a tool.This also distinguishes the base portion outer surface and the leg outer surfaces from a top surface of the lighting assembly facing away from a machining zone, ie, a workpiece and / or a tool.

[0013] According to one embodiment, the at least one light source is arranged on one of the base section outer surface and the two leg outer surfaces. In the event that the lighting assembly comprises a plurality of light sources and / or an elongated light-guiding element, the plurality of light sources and / or the elongated light-guiding element can also extend over two or all of the base section outer surface and the two leg outer surfaces. In all cases, reliable and effective illumination of the processing zone and / or an area surrounding the processing zone can thus be ensured. It is noted that the radiation direction of the one or more light sources and / or the elongated light-guiding element can be selected independently of their position.This means in particular that the one or more light sources can emit light in the direction of a processing zone, even though they are arranged on one or more of the outer surfaces of the base section and the two outer surfaces of the legs. A further advantage of arranging the one or more light sources and / or the elongated light-guiding element on one or more of the outer surfaces of the base section and the two outer surfaces of the legs is that in this way the lighting function is little or not at all impaired by any workpiece particles that may arise during operation, e.g. workpiece chips or workpiece dust. This is because the one or more light sources and / or the elongated light-guiding element are arranged “around the corner”, so to speak, and are protected from any workpiece particles due to this positioning.In particular, the underside of the lighting assembly is kept free of light sources, since light sources positioned in this way would be exposed to particularly strong or direct workpiece particles.

[0014] In a further embodiment, at least one of the legs is elastically deformable, at least in sections and at least along a direction towards the other leg and / or away from the other leg. The carrier unit can thus be fastened to the hand-held power tool and / or removed from the hand-held power tool by elastic deformation of at least one of the legs. In a preferred embodiment, both legs are elastically deformable. In other words, in such a configuration, a distance between the two legs can be temporarily increased by elastic deformation compared to a relaxed, i.e. undeformed state. Due to the elasticity of the deformation, the legs return to their undeformed state once such deformation is permitted. This simplifies fastening the lighting assembly to a hand-held power tool.For example, in a not yet secured state, the distance between the legs can be increased through elastic deformation. In this state, a section of the handheld power tool can be positioned particularly easily in the receiving space. Once this occurs, the legs can be released for elastic recovery. This achieves a particularly reliable, force-fitting and / or positive-fitting attachment of the lighting assembly to the handheld power tool.

[0015] The base section and the two legs can enclose a circumference of the receiving space by more than 270°. The wrap angle or enclosure angle of the receiving space is determined in particular from a perspective that corresponds to a top view of the lighting assembly. A viewing direction runs perpendicular to the directions along which the legs emanate from the base section. In other words, the lighting assembly is viewed such that its U-shape or C-shape is visible. The wrap angle or enclosure angle is then formed, for example, around a centroid or geometric centroid of the receiving space, i.e. a boundary surface of the receiving space that is visible in the top view. Alternatively, the wrap angle or enclosure angle can be determined around a volume centroid of the receiving space.When the lighting assembly is attached to a hand-held power tool, the center of gravity or the center of volume can lie on a motor axis, a gear axis, e.g., of an eccentric gear, and / or a center axis of the tool interface of the hand-held power tool. It is also possible, when the lighting assembly is attached to a hand-held power tool, for the center of gravity or the center of volume to lie on a center axis of the housing section of the hand-held power tool to which the lighting assembly is attached. An imaginary line can be drawn between the center of gravity or the center of volume of the receiving space and one end of each of the two legs. Based on this, the angle between these two imaginary lines is measured, which coincides with an area of ​​the receiving space surrounded by the base section and the legs.The angle that completes this angle to 360°, i.e., the other angle that can be measured between these two imaginary lines, is assigned to a gap between the legs. This gap allows the section of the hand-held power tool to be moved into the receiving space. This gap is preferably located opposite the base section. Overall, a support unit designed in this way allows the lighting assembly to be easily and reliably attached to the hand-held power tool. The fact that the base section and the two legs enclose a circumference of the receiving space by more than 270° enables, in particular, a reliable, positive-locking attachment.

[0016] It is understood that the example in which the base section and two legs enclose a circumference of the receiving space by more than 270° can be combined in particular with the example in which at least one of the legs is elastically deformable, at least in sections and at least along a direction toward and / or away from the other leg. In such a configuration, the lighting assembly can be attached to the section of the handheld power tool in a particularly simple and reliable manner with a positive fit.

[0017] In one variant, at least one of the legs has a side surface that faces the other leg and is curved at least in sections. When viewed from the receiving space, the side surface is concave. In particular, the curvature of the side surface can be adapted to a curvature of that section of the hand-held power tool to which the lighting assembly is to be attached. This results in reliable attachment to the hand-held power tool. In particular, undesired relative movements between the lighting assembly and the hand-held power tool, for example wobbling or rattling, can be avoided. Furthermore, by utilizing the at least partially curved side surface, a positive and thus reliable connection between the lighting assembly and the hand-held power tool can be realized.In a preferred embodiment, both legs have a side surface facing the other leg and are curved at least in sections. In particular, the side surfaces are mirror-symmetrical with respect to a center plane running through the receiving space.

[0018] In one example, a circumference of the receiving space is curved at a transition from at least one of the legs to the base section. On the one hand, this serves to create a mechanically stable connection between the base section and the at least one leg. In other words, the base section and the at least one leg merge into one another via a radius. This preferably applies to both legs, i.e. the circumference of the receiving space is curved at each transition from one leg to the base section. Furthermore, this curvature can also be coordinated with an outer contour of the section of the hand-held power tool to which the lighting assembly is to be attached. This results in reliable attachment to the hand-held power tool. In particular, undesired relative movements between the lighting assembly and the hand-held power tool, for example wobbling or rattling, can be avoided in this way.

[0019] In one embodiment, at least one of the legs comprises a locking device for locking the lighting assembly to the handheld power tool. The locking of the lighting assembly to the handheld power tool is particularly positive. The locking device allows the lighting assembly to be held particularly reliably to the handheld power tool. This prevents the lighting assembly from accidentally becoming detached from the handheld power tool.

[0020] In one example, the locking device has at least one insertion bevel. Such an insertion bevel can also be referred to as a starting ramp or mounting bevel. The insertion bevel is preferably aligned with respect to a fastening direction such that a portion of the hand-held power tool contacts the insertion bevel and / or runs over the insertion bevel when the lighting assembly is fastened to the hand-held power tool. In this way, a simple fastening of the lighting assembly to the hand-held power tool can be combined with a reliable hold of the lighting assembly on the hand-held power tool.

[0021] According to one embodiment, a securing projection is provided on at least one free end of one of the two legs, which protrudes in the direction of the other leg relative to the remaining sections of the leg. Preferably, a securing projection is provided on each of the two legs, which protrudes in the direction of the other leg relative to the remaining sections of the leg. Such a securing projection can be designed to engage in a recess or an opening on the hand-held power tool. In one example, the securing projection is positioned and dimensioned such that it can engage in a fastening opening on the machine housing of the hand-held power tool, wherein the fastening opening is also designed to mount a lateral handle on the hand-held power tool. In this context, it can be exploited that hand-held power tools often have such a fastening opening.It is also possible for the handheld power tool to have two such mounting openings located on opposite sides of the handheld power tool. Such mounting openings can be provided so that both right-handed and left-handed users can attach a side handle to the handheld power tool that is ergonomically accessible. In this case, each of the two legs can have a locking projection, with each locking projection being designed to engage one of the mounting openings.

[0022] The base section can comprise a positioning element for positioning the lighting assembly on the hand-held power tool. In particular, the positioning element of the lighting assembly interacts with a positioning element of the hand-held power tool. This ensures that the lighting assembly can be fastened to the hand-held power tool with high precision in a predetermined relative position to the hand-held power tool. This also ensures that the lighting unit is fastened to the hand-held power tool in a predetermined relative position, so that a predetermined area can be illuminated relative to the hand-held power tool. In a case in which the positioning element serves to center the lighting assembly, the positioning element can also be referred to as a centering element. The positioning element of the hand-held power tool can accordingly also be referred to as a centering element.For example, the positioning element is designed as a recess on the support unit, in particular on the base section, and the positioning element of the hand-held power tool is designed as a projection on the hand-held power tool, which is designed to be received in the recess. The reverse case is of course also conceivable, ie, a projection can also be provided on the support unit and a recess on the hand-held power tool.

[0023] In one variant, at least one of the legs comprises an elongated projection extending at least partially along a circumference of the receiving space, which is designed to engage in an associated groove for fastening the lighting assembly to the hand-held power tool. Preferably, both legs are equipped with such a projection. In particular, the projection protrudes from the remaining sections of the leg in the direction of an interior of the receiving space. Since the groove on the hand-held power tool is designed to receive a respective associated projection, the groove preferably runs along a circumference of a machine housing of the hand-held power tool to which the lighting assembly is to be fastened. This results in a particularly reliable fastening of the lighting assembly to the hand-held power tool.

[0024] The lighting unit can comprise at least one elongate light-guiding element and / or a plurality of light sources. In this context, the plurality of light sources can be arranged along a line and / or in the form of a luminous band. In this way, the luminous output of the lighting unit can be increased. Furthermore, different sections of the elongate light-guiding element and / or individual ones of the plurality of light sources can be arranged at different positions on the support element and / or oriented in different directions. This results in multi-dimensional, in particular planar illumination of a processing zone and / or an area surrounding the processing zone.

[0025] In a case where the lighting unit comprises a plurality of light sources, each of the light sources can be designed as a light-emitting diode (LED). All LEDs can be of the same type. This results in a particularly simple design of the lighting unit. Furthermore, uniform illumination can be achieved relatively easily, at least in sections. However, it is also conceivable to use LEDs with different properties. In particular, LEDs can be used that have different main beam angles for the emitted light. By using such different LEDs, different lighting characteristics can be realized in different sections of the lighting unit.For example, the lighting characteristics of those LEDs pointing in the main working direction can be selected differently than the lighting characteristics of those LEDs oriented laterally with respect to the main working direction. Furthermore, LEDs with different main beam angles can be used to achieve uniform illumination, even though the LEDs providing the illumination are offset or shifted relative to one another in terms of their positions on the support unit. For example, uniform illumination can result if one or more LEDs positioned comparatively low have an essentially vertical main beam angle, and LEDs positioned at a slightly higher level have a downward-sloping main beam angle.In other words, variations in LED positioning can be compensated for, ensuring uniform illumination, by selecting LEDs with different main beam angles. This also allows for considerable freedom in LED positioning without negatively impacting the lighting. This allows LEDs to be positioned outside of rooms intended for other purposes, e.g., for positioning a user's hand. Nevertheless, good, and especially uniform, illumination can be ensured.

[0026] According to one development, the lighting unit comprises a vibration sensor that is signal-coupled to the light source, such that the light source can be operated depending on a detection result of the vibration sensor. In this context, the light source can be activated, in particular, when the vibration sensor detects a vibration. In a case in which the vibration sensor does not detect any vibration, the light source can be deactivated. In this context, the vibration results, in particular, from operation of the hand-held power tool. Consequently, the light source can be activated when the hand-held power tool is being operated and deactivated when the hand-held power tool is not being operated. In this context, the light source can remain activated for a predetermined follow-up time after detecting that the hand-held power tool is not being operated.A communication or information interface between the lighting assembly and the handheld power tool is not necessary for this. This means that the lighting assembly can be operated depending on the operating state of the handheld power tool even if the lighting assembly is retrofitted to the handheld power tool. In other words, the vibration sensor increases the flexibility of retrofitting the lighting assembly.

[0027] The vibration sensor is particularly designed to distinguish vibrations resulting from operation of the handheld power tool from other vibrations. This distinction can be made based on a frequency, a frequency spectrum, and / or an amplitude of the vibrations. Consequently, the light source can be reliably activated and deactivated based on a detection result of the vibration sensor when the handheld power tool is being operated or when operation of the handheld power tool is terminated. Vibrations resulting, for example, from transporting the handheld power tool do not lead to the activation or deactivation of the light source.

[0028] In one example, the lighting unit comprises an electrical energy storage unit that can be electrically coupled to the light source. A switching unit can be provided for the selective electrical connection of the energy storage unit and the light source. Consequently, the light source can be operated using electrical energy from the energy storage unit. The light source can therefore be operated independently of the handheld power tool, in particular independently of an energy storage unit of the handheld power tool, as well as independently of an energy supply infrastructure. The lighting unit can therefore be used on or retrofitted to a handheld power tool without having to couple the lighting unit and the handheld power tool with regard to a power supply. In this way, the usability and retrofitability of the lighting assembly becomes particularly simple and flexible.

[0029] The electrical energy storage unit preferably comprises at least one lithium-ion cell. Such cells have a particularly favorable ratio between electrical storage capacity and weight and volume. Furthermore, lithium-ion cells have advantageous properties with regard to electrical charging.

[0030] In another example, the lighting unit comprises an electrical energy conversion unit that can be electrically coupled to the light source. The electrical energy conversion unit is designed to provide electrical energy for the light source. The energy converted by the electrical energy conversion unit can originate from an environment of the energy conversion unit. In this context, the energy conversion unit converts, for example, kinetic energy resulting from a vibration or movement of the lighting assembly, and in particular from a handheld power tool on which the lighting assembly is installed, into electrical energy. Alternatively or additionally, the energy conversion unit can have an electrical generator, e.g., in the manner of a dynamo. The electrical energy conversion unit can also be referred to as an energy harvesting unit.

[0031] The support unit can have at least one passageway for air. Consequently, when the lighting assembly is mounted on the handheld power tool, a flow connection between an air duct of the handheld power tool and the surrounding area can be kept clear. In other words, blockage of such an air duct by the support unit is avoided. Negative effects of the lighting assembly on the operation and / or performance of the handheld power tool are thus avoided. In particular, in this context, a position and orientation of the passageway on the support unit are coordinated with a position and orientation of an air duct on the handheld power tool to which the lighting assembly is to be attached.

[0032] In one variant, the support unit comprises at least one grip recess for a human finger. This facilitates operation of the lighting assembly by a user. In this context, the grip recess is arranged in particular at an end section of one of the two legs. Preferably, such a grip recess is provided on each of the two legs in a respective end section.

[0033] It is understood that the example in which the carrier unit comprises at least one grip recess for a human finger can be combined in particular with the example according to which at least one of the legs is elastically deformable, at least in sections and at least along a direction toward and / or away from the other leg. In such a configuration, the elastically deformable leg(s) can be elastically deformed particularly easily by a user using the grip recess with their finger.

[0034] According to one embodiment, the carrier unit comprises at least one guide surface for guiding workpiece particles and / or for protecting against workpiece particles. Such a guide surface thus serves to keep workpiece particles in an area that is at least partially delimited by the guide surface. Alternatively or additionally, workpiece particles can be guided in a specific direction by means of the guide surface. In this way, workpiece particles can be kept separate from the light source and / or kept away from the light source. The light source can therefore be operated without being undesirably affected by workpiece particles. Alternatively or additionally, workpiece particles can be kept away from a user of the lighting assembly in this way, so that a user of the lighting assembly is not undesirably affected by the workpiece particles.

[0035] In one example, the carrier unit comprises at least one contact surface for placing the lighting assembly against an obstacle or a workpiece section. The lighting assembly can therefore be easily arranged in a predetermined relative position to an obstacle or a workpiece section. If the lighting assembly is attached to a hand-held power tool, this also applies to the hand-held power tool. Consequently, a workpiece can be machined using the hand-held power tool while maintaining a predetermined relative position to the obstacle or a workpiece section. In this way, on the one hand, undesired interaction, in particular machining, between the hand-held power tool and the obstacle or the workpiece section can be avoided. On the other hand, the precision during machining of those workpiece sections that are intended to interact with the hand-held power tool is increased.In this context, the lighting assembly and the hand-held power tool equipped with it can also be moved relative to the workpiece section and / or obstacle while the contact surface rests against the obstacle or the workpiece section. In this case, the contact surface slides against the obstacle or the workpiece section. Thus, the contact surface can also be referred to as a sliding surface.

[0036] In the field of hand-held grinding machines, a component or assembly having such a contact surface is often referred to as a protector or spacer. Consequently, the lighting assembly according to the invention can also provide the function of such a spacer or protector.

[0037] The at least one light source can be offset relative to the at least one contact surface in the direction of the receiving space. In other words, the at least one light source is offset relative to the at least one contact surface. This ensures that the contact surface always contacts the obstacle or the workpiece section, and not the light source. Rather, contact between the light source and the obstacle or workpiece section is avoided. This protects the light source from unwanted mechanical influences. Furthermore, the precision of a work result is enhanced by always using the designated contact surface for contact.

[0038] The lighting assembly may include an anti-glare element. An anti-glare element is understood to be a component or component section that is opaque or at least less transparent than the surroundings of the lighting assembly, i.e., in particular, than the ambient air. In particular, an anti-glare element blocks a light path between the light source and a user of the lighting assembly or provides it with an optical resistance. Consequently, unpleasant effects of the light source on the user are mitigated or avoided. In particular, glare from the light source is prevented.

[0039] According to a further development, in a plan view along a viewing direction perpendicular to the directions along which the legs extend from the base section, a width of each of the two legs is smaller than a width of the base section. In other words, the plan view corresponds to a view of the lighting assembly in which the U-shape or C-shape of the lighting assembly is visible. Such a configuration of the two legs thus has the effect that the lighting assembly, when attached to the hand-held power tool, protrudes only comparatively slightly from the hand-held power tool in the width direction of the two legs. In other words, the lighting assembly is particularly compact in the width direction of the legs.In this way, the freedom of movement for a user of the hand-held power tool is restricted comparatively little or not at all compared to a situation in which no lighting assembly is attached to the hand-held power tool. More generally, the ergonomics of the hand-held power tool remain essentially unaffected.

[0040] Furthermore, the object is achieved by a machine tool assembly. The machine tool assembly comprises a hand-held power tool, in particular a hand-guided grinding machine, which comprises a machine housing, and an inventive lighting assembly that is fastened to the hand-held power tool. The base section of the lighting assembly rests at least partially on a front surface of the machine housing facing in a main working direction of the hand-held power tool. The two legs each rest at least partially on oppositely arranged side surfaces of the machine housing, which are oriented laterally with respect to the main working direction. As already mentioned, the base section and the two legs of the support unit thus form a mechanical interface of the lighting assembly, via which the lighting assembly is fastened to the hand-held power tool, in particular to the hand-guided grinding machine.A mechanical interface is formed on the machine tool side of the hand-held power tool, which interacts with the mechanical interface formed by the lighting assembly. The two legs of the lighting assembly rest laterally on the machine housing of the hand-held power tool with respect to the main working direction. The lighting assembly and the hand-held power tool are coupled force-fitting and / or form-fitting. The lighting assembly is thus reliably attached to the hand-held power tool in a simple manner. The lighting assembly can be quickly and easily attached to the hand-held power tool by sliding it onto the machine housing against the main working direction. Furthermore, the lighting assembly can be quickly and easily removed from the hand-held power tool by pulling it off the machine housing along the main working direction.The light source serves, as before, to illuminate a processing zone and / or the area surrounding it. The light source can be used to generally increase brightness. Alternatively or additionally, the light source can be configured to generate a grazing light that falls at a relatively flat angle onto a workpiece being machined using the handheld power tool, so that defects and / or deficiencies in the work result, such as unevenness, scratches, and / or imperfections, can be easily detected by a user using the light source.

[0041] Preferably, the lighting assembly can be attached to the hand-held power tool without disassembly and can be separated from the hand-held power tool without disassembly. This means that the hand-held power tool does not have to be disassembled to attach the lighting assembly to the hand-held power tool. The lighting assembly can therefore be attached without any element of the hand-held power tool, in particular a tool or a tool interface, having to be disassembled. The same applies to separating the lighting assembly from the hand-held power tool. The lighting assembly can therefore be separated from the hand-held power tool without any element of the hand-held power tool, in particular a tool or a tool interface, having to be disassembled. Accessories and add-on parts are not considered elements of the hand-held power tool. This makes assembling and disassembling the lighting assembly particularly easy.

[0042] The hand-held power tool can be wider than the lighting assembly in a direction transverse to the main working direction. In other words, the lighting assembly does not protrude from the hand-held power tool in a direction transverse to the main working direction. In this context, a maximum width of the hand-held power tool is compared with a maximum width of the lighting assembly. The maximum width of the hand-held power tool can be determined by a tool or tool holder attached to it. As a result, handling of the hand-held power tool for machining a workpiece is not impaired, or only slightly impaired, by the presence of the lighting assembly. Furthermore, the freedom of movement for a user of the hand-held power tool is restricted comparatively little, or not at all, compared to a situation in which no lighting assembly is attached to the hand-held power tool.More generally, the ergonomics of the hand-held machine tool remain essentially unaffected.

[0043] Preferably, a machine housing of the hand-held power tool is wider than the lighting assembly in a direction transverse to the main working direction. In other words, the lighting assembly does not protrude beyond the machine housing of the hand-held power tool in a direction transverse to the main working direction. This particularly applies to a motor section or drive section of the machine housing. In this context, a maximum width of the machine housing of the hand-held power tool is compared with a maximum width of the lighting assembly. With such a configuration, handling of the hand-held power tool for machining a workpiece is not impaired, or only slightly impaired, by the presence of the lighting assembly.In addition, the freedom of movement for a user of the hand-held power tool is restricted comparatively little or not at all compared to a situation in which no lighting assembly is attached to the hand-held power tool. More generally, the ergonomics of the hand-held power tool remain essentially unaffected.

[0044] Alternatively, the lighting assembly can be no more than 15%, preferably no more than 10% or no more than 5%, wider than the hand-held power tool in a direction transverse to the main working direction. In this alternative, the lighting assembly is therefore wider than the hand-held power tool in a direction transverse to the main working direction. However, the lighting assembly is only slightly wider than the hand-held power tool. In this case, a maximum width of the hand-held power tool is compared with a maximum width of the lighting assembly. The maximum width of the hand-held power tool can be determined by a tool or tool holder attached to it. As a result, the presence of the lighting assembly has no or only slight adverse effects on the handling of the hand-held power tool for machining a workpiece.In addition, the freedom of movement for a user of the hand-held power tool is restricted comparatively little or not at all compared to a situation in which no lighting assembly is attached to the hand-held power tool. More generally, the ergonomics of the hand-held power tool remain essentially unaffected.

[0045] The alternative, in which the lighting assembly is wider than the hand-held power tool by a maximum of 15%, preferably by a maximum of 10% or a maximum of 5%, in a direction transverse to the main working direction, is particularly advantageous if the carrier unit comprises at least one contact surface for placing the lighting assembly against an obstacle or a workpiece section. As already explained, with such a configuration, the hand-held power tool can be easily arranged in a predetermined relative position to an obstacle or a workpiece section. Consequently, a workpiece can be machined using the hand-held power tool, wherein a predetermined relative position to the obstacle or a workpiece section is maintained. In this way, on the one hand, undesired interaction, in particular machining, between the hand-held power tool and the obstacle or the workpiece section can be avoided.On the other hand, this increases the precision when machining those workpiece sections that are to interact with the hand-held machine tool.

[0046] According to one embodiment, the hand-held power tool comprises a recess or an opening on the machine housing, which is designed to mount a side handle on the hand-held power tool. It is also possible for the hand-held power tool to have two such fastening openings, which are arranged on opposite sides of the hand-held power tool. Such fastening openings can be provided so that both right-handed and left-handed users can attach a side handle to the hand-held power tool, which is ergonomically accessible. In this case, a securing projection is provided on at least one free end of one of the two legs of the lighting assembly, which projects towards the other leg relative to the remaining sections of the leg.Preferably, each of the two legs of the lighting assembly is provided with a securing projection that protrudes toward the other leg relative to the remaining sections of the leg. The securing projections can engage in a respective recess or mounting opening in the hand-held power tool. Thus, the lighting assembly is reliably secured to the hand-held power tool.

[0047] Furthermore, the problem is solved by a modular system. The modular system comprises a hand-held power tool, a lighting assembly according to the invention, and a spacer assembly, which has at least one contact surface for applying the spacer assembly to an obstacle or a workpiece section. Optionally, the lighting assembly or the spacer assembly can be attached to a mounting section of the hand-held power tool. In this context, the spacer assembly does not have a light source. As already mentioned, such a spacer assembly can also be referred to as a protector in the field of hand-held grinding machines. Depending on the application or machining task, the lighting assembly or the spacer assembly can thus be attached to the mounting section of the hand-held power tool.In other words, the handheld machine tool has a single mechanical interface to which the spacer assembly and the lighting assembly can be optionally attached. A handheld machine tool belonging to this modular system can therefore be adapted relatively quickly and easily to a machining task by attaching either the spacer assembly or the lighting assembly to the mounting section.

[0048] In one embodiment, the modular system further comprises a guide assembly having at least one guide surface for guiding the hand-held power tool relative to a workpiece. Optionally, the lighting assembly, the spacer assembly, or the guide assembly can be attached to the attachment portion of the hand-held power tool. Depending on the application or machining task, the lighting assembly, the spacer assembly, or the guide assembly can be attached to the attachment portion of the hand-held power tool. In other words, the hand-held power tool has a single mechanical interface to which optionally the spacer assembly, the lighting assembly, or the guide assembly can be attached. A hand-held power tool belonging to this modular system can therefore be adapted to a machining task relatively quickly and easily.

[0049] It is understood that effects, advantages and features which were mentioned above only in connection with one of the lighting assembly according to the invention, the machine tool assembly according to the invention and the modular system according to the invention also apply in the same way to all other of the lighting assembly according to the invention, the machine tool assembly according to the invention and the modular system according to the invention.

[0050] The invention is explained below using various embodiments shown in the accompanying drawings. They show:

[0051] Figure 1 shows a machine tool assembly according to the invention according to a first embodiment with a lighting assembly according to the invention according to a first embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0052] Figure 2 shows the machine tool assembly from Figure 1 in a side view along a direction II in Figure 1,

[0053] Figure 3 shows the lighting assembly from Figures 1 and 2 in a separate, perspective view,

[0054] Figure 4 shows the machine tool assembly from Figures 1 and 2 in a view corresponding to Figure 2, wherein the lighting assembly is shown only schematically and a human hand is additionally illustrated,

[0055] Figure 5 shows a machine tool assembly according to the invention according to a second embodiment with a lighting assembly according to the invention according to a second embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-guided grinding machine, Figure 6 shows the machine tool assembly from Figure 5 in a plan view along a direction VI in Figure 5,

[0056] Figure 7 The machine tool assembly from Figures 5 and 6 in a state in which the lighting assembly is removed from the hand-held machine tool,

[0057] Figure 8 shows the lighting assembly from Figures 5 to 7 in a separate, perspective view,

[0058] Figure 9 shows a machine tool assembly according to the invention according to a third embodiment with a lighting assembly according to the invention according to a third embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0059] Figure 10 shows the machine tool assembly of Figure 9 in a plan view along a direction X in Figure 9,

[0060] Figure 11 shows a machine tool assembly according to the invention according to a fourth embodiment with a lighting assembly according to the invention according to a fourth embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0061] Figure 12 shows a machine tool assembly according to the invention according to a fifth embodiment with a lighting assembly according to a fifth embodiment, in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-guided grinding machine, Figure 13 shows the machine tool assembly from Figure 12 in a plan view along a direction XIII in Figure 12,

[0062] Figure 14 The machine tool assembly from Figures 12 and 13 in a state in which the lighting assembly is removed from the hand-held machine tool,

[0063] Figure 15 shows a machine tool assembly according to the invention according to a sixth embodiment with a lighting assembly according to a sixth embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0064] Figure 16 shows the machine tool assembly of Figure 15 in a plan view along a direction XVI in Figure 15,

[0065] Figure 17 shows a machine tool assembly according to the invention according to a seventh embodiment with a lighting assembly according to the invention according to a seventh embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0066] Figure 18 shows the machine tool assembly of Figure 17 in a plan view along a direction XVIII in Figure 17,

[0067] Figure 19 shows the machine tool assembly from Figures 17 and 18 in a perspective view in a state in which the lighting assembly is removed from the hand-held machine tool,

[0068] Figure 20 shows a machine tool assembly according to the invention according to an eighth embodiment with a lighting assembly according to the invention according to an eighth embodiment in a perspective view, wherein a hand-held machine tool of the machine tool assembly is a hand-held grinding machine,

[0069] Figure 21 shows the machine tool assembly of Figure 20 in a plan view along a direction XXI in Figure 20,

[0070] Figure 22 shows a lighting assembly according to a ninth embodiment,

[0071] Figure 23 shows a lighting assembly according to a tenth embodiment,

[0072] Figure 24 shows a machine tool assembly according to the invention according to an eleventh embodiment in a schematic representation, wherein a hand-held machine tool of the machine tool assembly is a hand-held jigsaw,

[0073] Figure 25 shows a machine tool assembly according to the invention according to a twelfth embodiment in a schematic representation, wherein a hand-held machine tool of the machine tool assembly is a hand-held oscillator, and

[0074] Figure 26 shows a construction kit according to the invention.

[0075] Figure 1 shows a machine tool assembly 10.

[0076] The machine tool assembly 10 comprises a hand-held machine tool 12, which in the illustrated embodiment is designed as a hand-held grinding machine.

[0077] The handheld power tool 12 comprises a machine housing 14, which essentially comprises a handle portion 16, which is designed to be gripped by a user of the handheld power tool 12, and a motor portion 18. A drive unit (not shown in detail) is accommodated in the motor portion 18 of the machine housing 14. This means that components of a transmission and / or another drive component can also be arranged within the motor portion 18.

[0078] The handle section 16 and the motor section 18 are oriented at an angle, more precisely substantially at right angles, to each other, so that the machine housing 14 is substantially L-shaped in a side view (see Figure 2).

[0079] At an end of the motor section 18 facing away from the handle section 16, a tool holder is provided to which a grinding tool 19, in this case a grinding wheel, is attached. The tool holder and thus the grinding tool 19 are coupled to the drive unit, so that they can be driven by the drive unit.

[0080] In the field of hand-held grinding machines, tool holders are often also referred to as grinding wheels. The actual grinding tool 19, i.e., the grinding wheel, can thus be attached to the grinding wheel.

[0081] In the illustrated embodiment, the hand-held power tool 12 further comprises a collecting container 20 for workpiece particles. This container is attached laterally to the tool holder end of the motor section 18. The collecting container 20 is coupled to the tool holder and thus to the grinding tool 19 attached thereto via channels extending inside the motor section 18 in such a way that workpiece particles can be transferred from a processing zone into the collecting container 20.

[0082] Furthermore, the machine tool assembly 10 comprises a lighting assembly 22, which is attached to the hand-held machine tool 12, more precisely to the motor section 18 of the machine housing 14 (see in particular Figure 3).

[0083] For this purpose, the lighting assembly 22 comprises a support unit 24. The support unit 24 is essentially constructed from a base section 26 and two legs 28, 30.

[0084] The legs 28, 30 extend from the base section 26 at opposite ends. The legs 28, 30 extend in the same direction.

[0085] The support unit 24 thus has a substantially U-shape, wherein the base section 26 represents a base of the U-shape and the two legs 28, 30 each represent a leg of the U-shape.

[0086] In a plan view along a viewing direction that is perpendicular to the directions along which the legs 28, 30 extend from the base section 26, a width B1, B2 of each of the two legs 28, 30 is smaller than a width BB of the base section 26.

[0087] In the illustrated embodiment, the widths B1, B2 of the legs 28, 30 are also selected such that the hand-held power tool 12, in a state in which the lighting assembly 22 is mounted on the hand-held power tool 12, is wider than the lighting assembly 22. In other words, the lighting assembly 22 is so narrow that it does not protrude laterally, i.e., transversely to the main working direction H, beyond an edge of the hand-held power tool 12. In the illustrated embodiment, this edge is formed by the tool holder and the grinding tool 19 attached thereto.

[0088] The carrier unit 24 can be made of a plastic material.

[0089] Furthermore, each of the legs 28, 30 can be elastically deformed along a direction toward and away from the other leg 28, 30. This is illustrated in Figure 3 by two arrows.

[0090] By elastically deforming the legs 28, 30, a distance A between the legs 28, 30 can be increased from a relaxed, i.e., undeformed, state of the legs 28, 30 by elastically deforming the legs 28, 30. Due to their elasticity, the legs 28, 30 automatically return to their relaxed, i.e., undeformed, state as soon as the cause of the elastic deformation no longer exists.

[0091] Furthermore, the legs 28, 30 and the base section 26 define a receiving space 32 for a section of the handheld power tool. In the illustrated embodiment, this section is formed by the motor section 18 of the machine housing 14.

[0092] The leg 28 has a side surface 34 which faces the leg 30.

[0093] Similarly, the leg 30 has a side surface 36 facing the leg 28.

[0094] The base portion 26 also has a side surface 38 which points in the same direction as the legs 28, 30.

[0095] In the illustrated embodiment, the side surface 34 has a first section 34a that is concavely curved. This first section 34a is arranged at an end of the leg 28 facing the base section 26.

[0096] At the free end of the leg 28, i.e., at its end facing away from the base portion 26, the side surface 34 has a second portion 34b that is convexly curved. This convex curvature serves as the insertion radius or mounting radius, as will be explained below.

[0097] The first section 34a and the second section 34b merge into each other tangentially, ie without edges.

[0098] The side surface 36 of the leg 30 is configured in the same way. That is, this side surface 36 has a first section 36a that is concavely curved. This first section 36a is located at an end of the leg 30 facing the base section 26. At the free end of the leg 30, i.e., at its end facing away from the base section 26, the side surface 36 has a second section 36b that is convexly curved. This convex curvature serves as the insertion radius or mounting radius, as will be explained below.

[0099] The first section 36a and the second section 36b merge into each other tangentially, ie without edges.

[0100] The side surface 38 of the base section 26 is also convexly curved. The side surface 38, the side surface 34, and the side surface 36 merge tangentially, i.e., without edges, over a radius.

[0101] In the illustrated embodiment, the side surfaces 34, 36, 38 are designed to bear against the machine housing 14, more precisely against the motor section 18 of the machine housing 14, when the lighting assembly 22 is mounted on the handheld power tool 12. In such a state, the side surface 38 bears against a front surface of the machine housing 14 facing in a main working direction H of the handheld power tool 12. The two legs 28, 30 each bear against oppositely arranged side surfaces of the machine housing 14, wherein the side surfaces are oriented laterally with respect to the main working direction H.

[0102] The side surfaces 34, 36, 38 are thus shaped in such a way that, in the assembled state of the lighting assembly 22, they fit snugly against an outer circumference of the machine housing 14.

[0103] The base section 26 and the two legs 28, 30 enclose a circumference of the receiving space 32 by more than 270°, so that in the assembled state, the lighting assembly 22 is held in a form-fitting manner on the machine housing 14, and vice versa. If the legs 28, 30 are elastically deformed while resting against the machine housing 14, the fastening also has a force-fitting component. In this case, the legs 28, 30 clamp the machine housing 14 between them. The elastic deformability of the legs 28, 30 is also utilized for the assembly of the lighting assembly 22 on the handheld power tool 12. In order to mount the lighting assembly 22 on the hand-held machine tool 12, the lighting assembly 22 is pushed onto the machine housing 14, ie the motor section 18, essentially opposite to the main working direction H.In this case, the convex radii of the respective second sections 34b, 36b of the legs 28, 30 initially come into contact with the machine housing 14. In the relaxed, i.e., undeformed, state of the legs 28, 30, the distance A between the free ends of the legs 28, 30 is smaller than a diameter of that section of the machine housing 14 on which the lighting assembly 22 is to be mounted.

[0104] However, the lighting assembly 20 can still be pushed onto this section of the machine housing 14, since the free ends of the legs 28, 30 can be moved apart by elastic deformation. Only when the section of the machine housing 14 with the greatest lateral extension has passed the free ends of the legs 28, 30 do the free ends of the legs 28, 30 move toward each other again by elastic recovery.

[0105] The lighting assembly 22 is removed from the hand-held power tool 12 in the same way, i.e., the lighting assembly 22 is pulled off the machine housing 14 essentially along the main working direction H, with the legs 28, 30 being elastically deformed to release the positive connection between the lighting assembly 22 and the hand-held power tool 12. If a force-locking connection also existed between the lighting assembly 22 and the hand-held power tool 12, this connection is also released.

[0106] The lighting assembly 22 further comprises a lighting unit 40.

[0107] This has a lighting element 42, which in the illustrated embodiment comprises a light source 44 in the form of an LED. The lighting element 42 is positioned on the base section 26 and points in a direction opposite to the receiving space 32. This means that, when the lighting assembly 22 is mounted on the handheld power tool 12, the lighting element 42 points essentially along the main working direction H. This direction also corresponds to the main radiation direction of the lighting element 42 or the light source 44.

[0108] The lighting unit 40 further comprises an electrical energy storage unit 46 and a switching unit 48.

[0109] The electrical energy storage unit 46 is coupled to the light source 44 via the switching unit 48, so that in a switched-on state the light source 44 can be supplied with electrical energy from the energy storage unit 46.

[0110] In this context, the switching unit 48 has a switch 50, which in the illustrated embodiment is designed as a pushbutton that can be manually actuated by a user of the lighting assembly 22 and / or the handheld power tool 12. The switch 50 is positioned on the base section 26. Thus, by actuating the switch 50, the user can transfer the switching unit 48 from an on state to an off state and vice versa. Thus, the user can activate and deactivate the light source 44.

[0111] The switching unit 48 also includes a vibration sensor 52.

[0112] The vibration sensor 52 is signal-coupled to the light source 44, so that the light source 44 can be operated depending on a detection result of the vibration sensor 52. In this context, the vibration sensor 52 is designed to detect a vibration resulting from operation of the hand-held power tool 12. In such a case, the light source 44 can be automatically activated based on the detection of this vibration. In the event that no more vibrations are detected by the vibration sensor 52, the light source 44 can be automatically deactivated. In such an operating mode of the lighting unit 40, which can also be referred to as automatic mode, the light source 44 is therefore automatically activated or deactivated based on the detection result of the vibration sensor 52.

[0113] Optionally, the lighting unit 40 can also include an electrical energy conversion unit 54, which in the illustrated embodiment is designed as an energy harvesting unit. The electrical energy conversion unit 54 is designed to convert the kinetic energy resulting from the operation of the hand-held power tool 12, which energy is present, for example, in the form of vibrations, into electrical energy.

[0114] The electrical energy conversion unit 54 is electrically connected to the electrical energy storage unit 46. Thus, electrical energy converted from kinetic energy by the energy conversion unit 54 can be fed into the electrical energy storage unit 46.

[0115] In addition, the lighting unit 40 may comprise a display unit (not shown in detail) which is designed to display a charge state of the energy storage unit 46.

[0116] Furthermore, the lighting unit 40 can have a charging interface (not shown in detail) that is electrically coupled to the energy storage unit 46, so that the energy storage unit 46 can be supplied with electrical energy via the charging interface. The charging interface can be designed as a charging plug or charging socket, e.g., according to the USB-C standard. Alternatively or additionally, the charging interface can be designed as an inductive charging interface.

[0117] All components of the lighting unit 40, i.e. the lighting element 42 with the light source 44, the electrical energy storage unit 46, the switching unit 48 with the switch 50 and the vibration sensor 52 as well as the electrical energy conversion unit 54, are fastened to the carrier unit 24, so that in summary it can also be said that the lighting unit 40 is fastened to the carrier unit 24. In this context, some or all of the components of the lighting unit 40, i.e. some or all of the lighting element 42 with the light source 44, the electrical energy storage unit 46, the switching unit 48 with the switch 50 and the vibration sensor 52, as well as the electrical energy conversion unit 54, can be fastened to a common carrier board and preferably electrically contacted via the common carrier board.

[0118] Alternatively, some or all components of the lighting unit 40, i.e. some or all of the lighting element 42 with light source 44, electrical energy storage unit 46, switching unit 48 with switch 50 and vibration sensor 52, as well as electrical energy conversion unit 54, can be attached to a common carrier film and preferably electrically contacted via the common carrier film.

[0119] In this context, the carrier unit 24 can comprise two housing shells, each forming a portion of the base portion 26 and optionally portions of the legs 38, 30. A receiving space for the components of the lighting unit 40 can be formed between the two housing shells. The carrier board or carrier film with the components of the lighting unit 40 can be accommodated in this receiving space. In other words, the carrier board or carrier film can be positioned between the two housing shells in the manner of a sandwich.

[0120] In addition, the lighting assembly 22 includes an anti-glare element 56.

[0121] In the illustrated embodiment, the anti-glare element 56 is designed as a plate-shaped section of the support unit 24, more precisely of the base section 26 of the support unit 24. During operation of the lighting assembly 22, this plate-shaped section projects beyond the lighting element 42 on an upper side, i.e., above the lighting element 42, in the main working direction H. Consequently, the anti-glare element 56 prevents a user of the lighting assembly 22, more precisely of the machine tool assembly 10, from being dazzled by the light generated by the light source 44. Overall, the lighting assembly 22 can be attached to the motor section 18 of the machine housing 14 in such a way that a user can operate the hand-held power tool largely as if the lighting assembly 22 were not present.This is illustrated in Figure 4, in which a human hand is illustrated with a dashed line and the lighting assembly 22 is shown only schematically with a dotted line.

[0122] Figures 5 to 8 show a second embodiment of the machine tool assembly 10, which includes a lighting assembly 22 according to a second embodiment. In this embodiment, the hand-held power tool 12 is again designed as a hand-guided grinding machine, which now has a substantially circular grinding disc for a substantially circular grinding tool 19, i.e., a substantially circular grinding wheel.

[0123] The following only discusses the differences from the previously explained embodiment. Otherwise, the above explanations apply accordingly.

[0124] A mechanical interface 58 for fastening the lighting assembly 22 is now provided on the hand-held machine tool 12, more precisely on the machine housing 14.

[0125] In the illustrated embodiment, the mechanical interface 58 is formed by a groove 60 which extends more than 270° around a circumference of the motor section 18 of the machine housing 14, as will be explained in more detail below.

[0126] The groove 60 is symmetrical with respect to a center plane of the machine, which encompasses the main working direction H and is perpendicular to the grinding tool 19. In other words, a center point of the groove 60 lies on the front surface facing the main working direction H of the hand-held power tool 12. Starting from this center point, the groove 60 extends equally to both sides of the motor section 18. The mechanical interface 58 has a positioning element 62 designed to fasten the lighting assembly 22 in a predetermined position on the hand-held power tool 12. In the illustrated embodiment, the positioning element 62 is formed as a projection within the groove 60. Since a height of this projection corresponds exactly to a depth of the groove 60, the positioning element 62 can also be viewed as a local interruption in the course of the groove 60 (see in particular Figure 7).

[0127] The mechanical interface 58 further comprises two locking means 64.

[0128] These serve to lock the lighting assembly 22 to the hand-held machine tool 12, i.e. to hold it reliably to the hand-held machine tool 12.

[0129] In the illustrated embodiment, the locking means 64 are each arranged at one end of the groove 60. The locking means 64 are formed by local recesses at the bottom of the groove 60.

[0130] The transition into the local recesses is designed in a step-like or ledge-like manner, enabling positive locking.

[0131] The lighting assembly 22, more precisely the support element 24, is designed to be attached to the mechanical interface 58 of the hand-held power tool 12.

[0132] For this purpose, the carrier unit 24 is again essentially constructed from a base section 26 and two legs 28, 30.

[0133] The legs 28, 30 extend from the base section 26 at opposite ends. The legs 28, 30 extend in the same direction.

[0134] The support unit 24 thus essentially has a U-shape again, with the base section 26 representing a base of the U-shape and the two legs 28, 30 each representing a leg of the U-shape. The support unit 24 is made of a plastic material, as before.

[0135] Furthermore, each of the legs 28, 30 can be elastically deformed along a direction toward and away from the other leg 28, 30. This is illustrated in Figure 8 by two arrows (see especially Figure 8).

[0136] By elastically deforming the legs 28, 30, a distance A between the legs 28, 30 can be increased from a relaxed, i.e., undeformed, state of the legs 28, 30 by elastically deforming the legs 28, 30. Due to their elasticity, the legs 28, 30 automatically return to their relaxed, i.e., undeformed, state as soon as the cause of the elastic deformation no longer exists.

[0137] Furthermore, the legs 28, 30 and the base section 26 define a receiving space 32 for a section of the handheld power tool. In the illustrated embodiment, this section is formed by the motor section 18 of the machine housing 14.

[0138] In addition, each of the legs 28, 30 is provided with an elongated projection 66, 68 which extends along a circumference of the receiving space 32.

[0139] The base portion 26 also has an elongated projection 70 that extends along a circumference of the receiving space 32.

[0140] In the illustrated embodiment, the elongated projections 66, 68, 70 merge seamlessly into one another. Furthermore, the elongated projections 66, 68, 70 are designed to engage the groove 60.

[0141] A positioning element 72 for positioning the lighting assembly 22 on the handheld power tool 12 is also formed on the carrier unit 24, more precisely on the base section 26. For this purpose, the positioning element 72 interacts with the positioning element 62 of the handheld power tool 12. In the illustrated embodiment, the positioning element 72 is formed as a recess in which the positioning element 62, formed as a projection or elevation, can be received. In other words, the elongated projection 70 on the base section 26 is interrupted by the recess forming the positioning element 72.

[0142] It is understood that, in the interests of precise positioning, the recess forming the positioning element 72 is only slightly wider than the projection forming the positioning element 62.

[0143] In addition, both legs 28, 30 are provided with a locking device 74, 76.

[0144] The locking devices 74, 76 serve to lock, i.e. reliably hold, the lighting assembly 22 on the hand-held power tool 12. For this purpose, the locking devices 74, 76 cooperate with the locking means 64 of the hand-held power tool 12.

[0145] In the illustrated embodiment, the locking devices are therefore designed as projection elements that protrude beyond the elongated projections 66, 68. The projection elements can be received in the locking means 64 designed as a recess.

[0146] The projection elements each have an insertion bevel 78, 80 at their ends pointing in the direction of the free ends of the legs 28, 30, which serve to easily mount the lighting assembly 22 on the hand-held power tool 12.

[0147] At their ends facing away from the free ends of the legs 28, 30, the projection elements transition in a stepped manner into the elongated projections 66, 68. This serves to form a positive connection between the lighting assembly 22 and the handheld power tool 12. In the embodiment according to Figures 5 to 8, the side surface 34 of the leg 28, which faces the leg 30, is thus formed by an end face of the elongated projection 66. The side surface 34 is concavely curved outside the locking device 74.

[0148] Similarly, the side surface 36 of the leg 30, which faces the leg 28, is formed by an end face of the elongated projection 68. The side surface 36 is also concavely curved outside the locking device 76.

[0149] The side surface 38 of the base portion 26 is also formed by an end face of the elongated projection 70. The side surface 38 is concavely curved.

[0150] The side surface 38, the side surface 34 and the side surface 36 merge into one another tangentially, ie without edges, over a radius.

[0151] In the illustrated embodiment, the side surfaces 34, 36, 38 are designed to bear against the machine housing 14, more precisely against a bottom of the groove 60 provided on the motor section 18 of the machine housing 14, when the lighting assembly 22 is mounted on the hand-held power tool 12.

[0152] In such a state, the side surface 38 rests against a base of a section of the groove 60 which points in the main working direction H of the hand-held power tool 12.

[0153] The side surfaces 34, 36 of the two legs 28, 30 each rest on a base of a section of the groove 60 which is oriented laterally with respect to the main working direction H.

[0154] The side surfaces 34, 36, 38 are thus shaped such that, in the assembled state of the lighting assembly 22, they rest against a groove bottom of the groove 60.

[0155] The base section 26 and the two legs 28, 30 enclose a circumference of the receiving space 32 by more than 270°, so that in the assembled state, the lighting assembly 22 is held in a form-fitting manner on the machine housing 14, more precisely, on the mechanical interface 58, and vice versa. In the event that the legs 28, 30 are elastically deformed while resting against the machine housing 14, the fastening also has a force-fitting component. In this case, the legs 28, 30 clamp the machine housing 14 between them.

[0156] The elastic deformability of the legs 28, 30 is also used for the assembly of the lighting assembly 22 on the hand-held machine tool 12.

[0157] To mount the lighting assembly 22 on the handheld power tool 12, the lighting assembly 22 is pushed onto the machine housing 14, i.e., the motor section 18, essentially opposite to the main working direction H. In doing so, the projection elements of the locking devices 74, 76, in particular the insertion bevels 78, 80, first come into contact with the machine housing 14, more precisely with the groove 60. In the relaxed, i.e., undeformed, state of the legs 28, 30, the distance A between the free ends of the legs 28, 30 is smaller than a diameter of that section of the machine housing 14 on which the lighting assembly 22 is to be mounted.

[0158] However, the lighting assembly 22 can still be pushed onto this section of the machine housing 14, since the free ends of the legs 28, 30 can be moved apart by elastic deformation. This also allows the elongated projections 66, 68 to engage in laterally opposite sections of the groove 60 and to be displaced within the groove 60 counter to the main working direction H.

[0159] Only when the section of the machine housing 14 with the greatest lateral extent has passed the free ends of the legs 28, 30 do the free ends of the legs 28, 30 move towards each other again by elastic recovery.

[0160] Furthermore, the free ends of the legs 28, 30 abruptly move toward each other due to elastic recovery when the locking devices 74, 76 engage with the locking means 64 of the hand-held power tool, i.e., when the lighting assembly 22 is locked to the hand-held power tool 12. In this process, the elongated projection 70 also engages the section of the groove 60 provided on the front side, and the positioning element 72 of the lighting assembly 22 cooperates with the positioning element 62 of the hand-held power tool 12.

[0161] The lighting assembly 22 is removed from the hand-held power tool 12 in the same way, i.e., the lighting assembly 22 is pulled off the machine housing 14 essentially along the main working direction H, with the legs 28, 30 being elastically deformed to release the positive connection between the lighting assembly 22 and the hand-held power tool 12. If a force-locking connection also existed between the lighting assembly 22 and the hand-held power tool 12, this is also released. The elongated projections 66, 68 and the locking devices 74, 76 slide along the groove 60 essentially along the main working direction H.

[0162] In the embodiment according to Figures 5 to 8, the carrier unit 24 also has a guide surface 82. The guide surface 82 is designed to guide workpiece particles generated in the processing zone toward the collection container 20 and, at the same time, to protect a user of the hand-held power tool 12 from workpiece particles.

[0163] In the illustrated embodiment, the guide surface 82 is formed as the inner surface of a circumferential apron 84 which extends from the free end of the leg 28 to the free end of the leg 30.

[0164] In the assembled state of the lighting assembly 22, the circumferential apron 84 spans an area from the mechanical interface 58 to an edge of the grinding tool 19. Thus, workpiece particles generated and / or whirled up by the grinding tool 19 can be reliably diverted.

[0165] Furthermore, several openings 86 are provided in the apron 84. These serve to allow a user to visually determine the operating state of the grinding tool 19. In particular, by looking through one of the openings 86, a user can see whether the grinding tool 19 is rotating or not. A certain deterioration in the guiding function for workpiece particles is accepted in this case.

[0166] For the sake of clarity, only some of the openings 86 are provided with a reference symbol.

[0167] In order to make the already mentioned elastic deformability of the carrier unit 24 easy to handle for a user, two recessed grips 88 are also provided on the apron 84.

[0168] The grip recesses 88 are arranged in the region of the free ends of the legs 28, 30. Furthermore, the grip recesses 88 are designed to accommodate a human finger, at least in sections, so that a user of the hand-held power tool 12 can reach into one of the grip recesses 88 with a finger of one hand and thus manually pull the free ends of the legs 28, 30 apart, causing the support unit 24 to elastically deform. This particularly facilitates the removal of the lighting assembly 22 from the hand-held power tool 12, since the locking mechanism can be easily released in this way.

[0169] As before, the lighting assembly 22 also includes a lighting unit 40.

[0170] In the embodiment according to Figures 5 to 8, this comprises a plurality of light sources 44 which are arranged at an end of the apron 84 on the grinding tool side along a line which essentially corresponds to the end circumference of the apron 84.

[0171] The light sources 44 are thus distributed both over the base section 26 and over the legs 28, 30. The light sources 44 therefore illuminate both along the main working direction H of the hand-held power tool 12 and laterally thereto.

[0172] The light sources 44 are evenly distributed around the circumference.

[0173] As before, each light source 44 is formed by an LED. For clarity, only some light sources 44 are provided with a reference symbol in the figures.

[0174] To make the position of the light sources 44 more visible, a lens element that covers the light sources 44 and scatters the emitted light has been omitted from Figures 5 to 8. In the illustrated embodiment, the lens element is designed as an elongated, translucent or transparent component that covers all light sources 44.

[0175] Optionally, an outer side of the component forming the lens element can have a contact surface for positioning the lighting assembly 22 against an obstacle or a workpiece section. The hand-held power tool 12 can thus be moved with high precision relative to an obstacle or a workpiece section by positioning such a contact surface against the obstacle or workpiece section.

[0176] It is understood that for this option, the lighting assembly 22 must be wider than the hand-held power tool 12. In the illustrated embodiment, the lighting assembly 22 is only very slightly, ie less than 5%, wider than the hand-held power tool 12 (see in particular Figure 6).

[0177] In a state in which the lighting assembly 22 is attached to the hand-held machine tool 12, the light sources 44 are arranged very closely above a workpiece.

[0178] As before, the lighting unit 40 also has an electrical energy storage unit 46 and a switching unit 48, which are shown only schematically in Figures 5 to 8. It is understood that the positioning of the switching unit 48, in particular the switch 50, is merely exemplary. The switching unit 48, in particular the switch 50, can alternatively also be arranged laterally on the support unit 24.

[0179] The switching unit 48 is equipped with a switch 50 and a vibration sensor 52. An electrical energy conversion unit 54 can also be optionally provided.

[0180] As before, all components of the lighting unit 40, ie the lighting element 42 with the light source 44, the electrical energy storage unit 46, the switching unit 48 with the switch 50 and the vibration sensor 52 as well as the electrical energy conversion unit 54, are attached to the carrier unit 24, so that in summary it can also be said that the lighting unit 40 is attached to the carrier unit 24.

[0181] Figures 9 and 10 show a third embodiment of the machine tool assembly 10, which includes a lighting assembly 22 according to a third embodiment. The hand-held power tool 12 in this embodiment corresponds to the hand-held power tool 12 from the second embodiment of the machine tool assembly 10, which was already explained with reference to Figures 5 to 8. In particular, the mechanical interface 58 is identical in both embodiments.

[0182] The following will again only address the differences from the previously discussed embodiments. Otherwise, the above explanations apply accordingly.

[0183] In this context, the lighting assembly 22 according to the third embodiment differs from the lighting assembly 22 according to the second embodiment in that neither a guide surface 82 nor an apron 84 is provided in the third embodiment.

[0184] Accordingly, the light sources 44, which in their configuration and arrangement essentially correspond to the arrangement of the light sources 44 from the second embodiment, are positioned in the region of the elongated projections 66, 68, 70. More precisely, the light sources 44 are arranged on opposite sides of the legs 28, 30 and the base section 26 with respect to the elongated projections 66, 68, 70. To make the position of the light sources 44 more visible, a lens element that covers the light sources 44 and scatters emitted light has been omitted from Figures 10 and 11. In the illustrated embodiment, the lens element is designed as an elongated, translucent or transparent component that covers all of the light sources 44.

[0185] Furthermore, for the sake of clarity, the other components of the lighting unit 40, ie the electrical energy storage unit 46, the switching unit 48 with the switch 50 and the vibration sensor 52 as well as the electrical energy conversion unit 54, are not shown.

[0186] Similar to the first embodiment, but different from the second embodiment, the lighting assembly 22 in the third embodiment comprises an anti-glare element 56. This is designed as a circumferential projection which, during operation of the lighting assembly 22, i.e., in a position in which the lighting assembly 22 is attached to the handheld power tool 12, lies above the light sources 44. In other words, the circumferential projection separates the light sources 44 from a user who grips the handheld power tool 12, for example, by the handle section 16.

[0187] In the third embodiment, the light sources 44 and the lighting assembly 22 as a whole are therefore provided at a certain distance from the grinding tool 19.

[0188] Furthermore, in the third embodiment, the hand-held power tool 12 is wider than the lighting assembly 22 in a direction transverse to the main working direction H. In other words, the lighting assembly is narrower than the hand-held power tool 12 in this direction (see in particular Figure 10).

[0189] Figure 11 shows a fourth embodiment of the machine tool assembly 10, which includes a lighting assembly 22 according to a fourth embodiment. The hand-held power tool 12 in this embodiment corresponds to the hand-held power tool 12 from the second and third embodiments of the machine tool assembly 10, which were already explained with reference to Figures 5 to 8 and Figures 9 and 10 - M -. In particular, the mechanical interface 58 is identical in all of the aforementioned embodiments.

[0190] The following will again only address the differences from the previously discussed embodiments. Otherwise, the above explanations apply accordingly.

[0191] The lighting assembly 22 according to the fourth embodiment can be regarded as a combination of the lighting assembly 22 according to the second embodiment and the third embodiment.

[0192] In this context, in the lighting assembly 22 according to the fourth embodiment, the light sources 44 are arranged on the support unit 24 in the same way as in the third embodiment.

[0193] As in the third embodiment, the other components of the lighting unit 40, ie the electrical energy storage unit 46, the switching unit 48 with the switch 50 and the vibration sensor 52 as well as the electrical energy conversion unit 54, are not shown here for the sake of clarity.

[0194] In addition, however, the lighting assembly 22 according to the fourth embodiment has a guide surface 82 provided on an apron 84. The apron 84 and the guide surface 82 are configured identically to the lighting assembly 22 according to the second embodiment. Only, the light sources 44 are no longer arranged at the grinding tool-side end of the apron 84.

[0195] Instead, however, a contact surface 90 is provided at the grinding tool-side end of the apron 84, which runs along the support unit 24 of the lighting assembly 22 and is used to position the lighting assembly 22 against an obstacle or a workpiece section. The hand-held power tool 12 can thus be moved with high precision relative to an obstacle or a workpiece section by positioning the contact surface 90 against this obstacle or workpiece section.

[0196] It is understood that for this option, the lighting assembly 22 must be wider than the hand-held power tool 12. In the illustrated embodiment, the lighting assembly 22 is only very slightly, ie, less than 10%, wider than the hand-held power tool 12.

[0197] This configuration also results in the light sources 44 being offset relative to the contact surface 90 in the direction of the receiving space 32.

[0198] This has the advantage, particularly compared to the lighting assembly 22 according to the second embodiment, in which a contact surface is optionally provided by a component forming a lens element, that the contact surface 90 and the light sources 44 are separated from one another. The risk of the light sources 44 being damaged by using the contact surface 90, i.e., by placing the contact surface 90 against an obstacle or a section of a workpiece, is thus very low.

[0199] In addition, the offset of the light sources 44 allows good illumination of the work area, even in a situation in which the lighting assembly 22 rests against an obstacle or a section of a workpiece via the contact surface 90.

[0200] Figures 12 to 14 show a fifth embodiment of the machine tool assembly 10, which comprises a lighting assembly 22 according to a fifth embodiment. In this embodiment, the hand-held power tool 12 has a substantially rectangular tool interface that is designed to be coupled to a substantially rectangular grinding tool 19. Otherwise, the hand-held power tool 12 of the machine tool assembly 10 according to the fifth embodiment corresponds to the hand-held power tool 12 from the second, third, and fourth embodiments of the machine tool assembly 10. In particular, the mechanical interface 58 is identical in all of these embodiments. In the following, only the differences from the previously explained embodiments will be discussed. Otherwise, the above explanations apply accordingly.

[0201] The machine tool assembly 10 of the fifth embodiment is explained in particular based on the machine tool assembly 10 of the second embodiment. In this context, the machine tool assembly 10 according to the fifth embodiment can be viewed as a variant or modification of the machine tool assembly 10 of the second embodiment.

[0202] The apron 84 is adapted to the rectangular shape of the grinding tool 19.

[0203] Furthermore, instead of the openings 86, recesses 92 are provided at the front corners of the apron 84, which follow the rectangular contour of the grinding tool 19 in the main working direction H. The recesses 92 serve to enable a user of the machine tool assembly 10 to visually detect the grinding tool 19.

[0204] Furthermore, the recesses 92 allow a corner of the grinding tool 19 to interact directly with a workpiece, i.e., without an intermediate portion of the lighting assembly 22, in particular a portion of the apron 84.

[0205] To make the position of the light sources 44 more visible, lens elements each covering a group of light sources 44 are omitted from Figures 12 to 14. In the illustrated embodiment, the lens elements are designed as elongated, translucent or transparent components, each covering a group of light sources 44.

[0206] In the fifth embodiment, a total of three lens elements are provided, wherein, when viewed along the main working direction H, one of the lens elements covers the light sources 44 on a front side of the lighting assembly 22. The other two lens elements each cover the laterally arranged light sources 44. Optionally, outer sides of the components forming the lens elements can have a contact surface for placing the lighting assembly 22 against an obstacle or a workpiece section. The hand-held power tool 12 can thus be moved with high precision relative to an obstacle or a workpiece section by placing such a contact surface against this obstacle or workpiece section.

[0207] It is understood that for this option, the lighting assembly 22 must be wider than the hand-held power tool 12. In the illustrated embodiment, the lighting assembly 22 is only very slightly, ie, less than 10%, wider than the hand-held power tool 12.

[0208] Figures 15 and 16 show a sixth embodiment of the machine tool assembly 10, which includes a lighting assembly 22 according to a sixth embodiment. The hand-held power tool 12 in this embodiment is the same as the hand-held power tool 12 of the machine tool assembly 10 according to the fifth embodiment.

[0209] The lighting assembly 22 is identical to the lighting assembly 22 of Figures 9 and 10, ie the lighting assembly 22 according to the sixth embodiment corresponds to the lighting assembly 22 according to the third embodiment.

[0210] However, due to the fact that the grinding tool 19 is rectangular in shape in the sixth embodiment, the illumination assembly 22 is wider than the hand-held power tool 12 in a direction transverse to the main working direction H in the sixth embodiment.

[0211] In the illustrated embodiment, the lighting assembly 22 is approximately 10% wider than the hand-held power tool 12, i.e., than the grinding tool 19.

[0212] It is understood that, analogous to the fourth embodiment, a variant of the machine tool assembly 10 is also conceivable, which corresponds to a combination of the fifth embodiment and the sixth embodiment. The result would be a machine tool assembly 10 with a lighting assembly 22 that corresponds to the embodiment according to Figure 11 except for the adaptation to the rectangular grinding tool 19.

[0213] Figures 17 to 19 show a seventh embodiment of the machine tool assembly 10, which includes a lighting assembly 22 according to a seventh embodiment. In this embodiment, the hand-held power tool 12 has a triangular tool interface with convex outwardly curved edges. This tool interface is designed to be coupled to a triangular grinding tool 19, the edges of which are also convex outwardly curved.

[0214] Such hand-held machine tools 12 and grinding tools 19 are also referred to as delta-shaped.

[0215] Otherwise, the hand-held power tool 12 of the machine tool assembly 10 according to the seventh embodiment corresponds to the hand-held power tool 12 from the second, third, fourth, fifth, and sixth embodiments of the machine tool assembly 10. In particular, the mechanical interface 58 is identical in all of these embodiments.

[0216] The following will again only address the differences from the previously discussed embodiments. Otherwise, the above explanations apply accordingly.

[0217] The machine tool assembly 10 of the seventh embodiment is explained in particular based on the machine tool assembly 10 of the second and fifth embodiments. In this context, the machine tool assembly 10 according to the seventh embodiment can be considered a variant or modification of the machine tool assembly 10 of the second and / or fifth embodiments. The apron 84 is adapted to the delta shape of the grinding tool 19.

[0218] In addition, openings 86 are now provided in the apron 84, as well as a recess 92 located along the main working direction H in the area of ​​the front tip of the delta shape. The recess 92 serves to enable a user of the machine tool assembly 10 to visually detect the grinding tool 19.

[0219] Furthermore, the recesses 92 allow the front corner of the grinding tool 19 to interact directly with a workpiece, i.e., without an intermediate portion of the lighting assembly 22, in particular a portion of the apron 84.

[0220] To make the position of the light sources 44 more visible, lens elements, each of which covers a group of light sources 44 and scatters emitted light, are omitted from Figures 17 to 19. In the illustrated embodiment, the lens elements are designed as elongated, translucent or transparent components, each of which covers a group of light sources 44.

[0221] In the seventh embodiment, a total of two lens elements are provided, each arranged on opposite sides with respect to the main working direction H

[0222] Optionally, the outer sides of the components forming the lens elements can have a contact surface for positioning the lighting assembly 22 against an obstacle or a workpiece section. The hand-held power tool 12 can thus be moved with high precision relative to an obstacle or a workpiece section by positioning such a contact surface against this obstacle or workpiece section.

[0223] It is understood that for this option, the lighting assembly 22 must be wider than the hand-held power tool 12.

[0224] In the illustrated embodiment, the lighting assembly 22 is only very slightly, i.e., less than 10%, wider than the hand-held power tool 12. Figures 20 and 21 show an eighth embodiment of the power tool assembly 10, which includes a lighting assembly 22 according to an eighth embodiment. The hand-held power tool 12 in this embodiment is the same as the hand-held power tool 12 of the power tool assembly 10 from the seventh embodiment.

[0225] The lighting assembly 22 is identical to the lighting assembly 22 from Figures 9 and 10 and from Figures 15 and 16, ie the lighting assembly 22 according to the eighth embodiment corresponds to the lighting assembly 22 according to the third embodiment and the sixth embodiment.

[0226] However, in the eighth embodiment, the lighting assembly 22 is narrower than the hand-held power tool 12 in a direction transverse to the main working direction H.

[0227] It is understood that, analogous to the fourth embodiment, a variant of the machine tool assembly 10 is also conceivable, which corresponds to a combination of the seventh embodiment and the eighth embodiment. The result would be a machine tool assembly 10 with a lighting assembly 22 that corresponds to the embodiment according to Figure 11 except for the adaptation to the delta-shaped grinding tool 19.

[0228] Figure 22 shows a ninth embodiment of a lighting assembly 22 that is compatible with the handheld power tools 12 shown in Figures 5 to 21. Again, only the differences from the preceding embodiments are discussed.

[0229] The lighting assembly 22 according to the ninth embodiment represents in particular a modification of the lighting assembly 22 according to the first embodiment.

[0230] In the lighting assembly 22 according to the ninth embodiment, the leg 28 is composed of two substantially parallel leg halves 28a, 28b. The two leg halves 28a, 28b are separated by an elongated passage channel 94 extending along the same direction.

[0231] Leg 30 is constructed in the same way. This means that leg 30 is composed of two essentially parallel leg halves 30a, 30b, which are separated by an elongated passage channel 96 extending along the same direction.

[0232] The base section 26 is also composed of two base section halves 26a, 26b, which are separated by an elongated passage channel 98. In an assembled state of the lighting assembly 22, the passage channels 94, 96, 98 are arranged along a circumference of the machine housing 14, more precisely, the motor section 18.

[0233] The size and position of the passage channels 94, 96, 98 are adapted to the handheld power tool 12 such that they are located above ventilation outlets and / or ventilation inlets of the handheld power tool 12. Consequently, air flowing out of these ventilation outlets or flowing into these ventilation inlets can flow through the passage channels 94, 96, 98. Thus, ventilation is not impeded by the lighting assembly 22.

[0234] In this context, the leg halves 28a, 30a shown at the top in Figure 22 as well as the base section half 26a shown above have side surfaces which in their construction essentially correspond to the side surfaces from the first embodiment of the lighting assembly 22.

[0235] The side surfaces of the leg halves 28b, 30b shown at the bottom in Figure 22 and the base section half 26b shown at the bottom in Figure 22 essentially correspond to the side surfaces of the embodiments according to Figures 5 to 21.

[0236] The lighting assembly 22 according to the ninth embodiment can thus be attached, on the one hand, to an interface 58 with a groove 60 of a machine housing 14 of a hand-held power tool 12. At the same time, the lighting assembly 22 can be snug against a periphery of the machine housing 14 where no groove is provided.

[0237] Figure 23 shows a tenth embodiment of a lighting assembly 22 that is compatible with the handheld power tools 12 shown in Figures 5 to 21. Again, only the differences from the preceding embodiments will be discussed, particularly compared to the ninth embodiment shown in Figure 22.

[0238] The lighting assembly 22 according to the tenth embodiment can be regarded in particular as a modification of the lighting assemblies 22 according to the first embodiment and the ninth embodiment.

[0239] As in the lighting assembly 22 according to the ninth embodiment, the leg 28 in the lighting assembly 22 of the tenth embodiment is also composed of two substantially parallel leg halves 28a, 28b. The two leg halves 28a, 28b are separated by an elongated passage channel 94 extending along the same direction.

[0240] Leg 30 is constructed in the same way. This means that leg 30 is composed of two essentially parallel leg halves 30a, 30b, which are separated by an elongated passage channel 96 extending along the same direction.

[0241] However, unlike the ninth embodiment of the lighting assembly 22, the base section 26 is designed as a continuous unit, i.e., the base section is not composed of two base section halves. Likewise, no passage channel is provided in the base section 26.

[0242] In an assembled state of the lighting assembly 22, only the passage channels 94, 96 are arranged along a circumference of the machine housing 14, more precisely, the motor section 18. The size and position of the passage channels 94, 96 are adapted to the handheld power tool 12 such that they are located above ventilation outlets and / or ventilation inlets of the handheld power tool 12. Consequently, air flowing out of these ventilation outlets or flowing into these ventilation inlets can flow through the passage channels 94, 96. Thus, ventilation is not impeded by the lighting assembly 22.

[0243] The side surfaces of the leg halves 28b, 30b shown at the bottom in Figure 23, as well as the base section 26 shown at the bottom in Figure 22, essentially correspond to the side surfaces of the embodiments according to Figures 5 to 21. The lighting assembly 22 according to the tenth embodiment can therefore be attached to an interface 58 with a groove 60 of a machine housing 14 of a hand-held power tool 12. Unlike the lighting assembly 22 of the first and ninth embodiments, the lighting assembly 22 according to the tenth embodiment is not designed to conform to a periphery of the machine housing 14 on which no groove is provided.

[0244] A further difference from the first embodiment and the ninth embodiment is that the locking device 74 and the elongated projection 66 are arranged on a section of the leg half 28b that is separated from the remaining sections of the leg half 28b by an elongated slot 28c. The slot 28c allows for simplified, elastic deformation of the section where the locking device 74 and the elongated projection 66 are provided in order to couple the lighting assembly 22 to the hand-held power tool 12 and uncouple it therefrom. The same applies to the section of the leg half 30b where the locking device 76 and the elongated projection 68 are arranged. This section is thus separated from the remaining sections of the leg half 30b by a slot 30c.

[0245] Figures 24 and 25 show further embodiments of the machine tool assembly 10. In each case, a lighting assembly 22 is shown only schematically. The lighting assembly 22 is, in particular, a lighting assembly 22 according to the first embodiment (see, in particular, Figure 3) or a lighting assembly 22 according to the ninth embodiment (see Figure 22).

[0246] However, the hand-held machine 12 is no longer designed as a hand-held grinding machine.

[0247] Rather, in the embodiment according to Figure 24, the hand-held power tool 12 is designed as a hand-held jigsaw.

[0248] In the embodiment according to Figure 25, the hand-held power tool 12 is designed as a so-called oscillator.

[0249] It is understood that the hand-held power tool 12 can also be designed differently, e.g., as an angle grinder. The lighting assembly 22 can also be used in conjunction with such hand-held power tools.

[0250] Figure 26 shows a modular system 100 which can be realized using each of the machine tool assemblies 10 already explained.

[0251] The kit 100 always comprises a hand-held power tool 12, a lighting assembly 22, and a spacer assembly 102. The lighting assembly 22 is a lighting assembly 22 according to one of the previously explained embodiments, which is compatible with the hand-held power tool 12.

[0252] The spacer assembly 102 includes a circumferential contact surface 90 for applying the spacer assembly 102 to an obstacle or a workpiece section.

[0253] The kit 100 shown in Figure 26 also includes an optional guide assembly 104. The guide assembly 104 serves to position the hand-held power tool 12 at a specific angle to a workpiece, so that, for example, edges can be machined with high precision. For this purpose, the guide assembly 104 includes a guide surface 106, which is designed to be positioned against the workpiece. Such guide assemblies 104 can also be referred to as angle positioning aids.

[0254] The hand-held power tool 12 is equipped with the mechanical interface 58, which was already explained above. More generally, the section of the hand-held power tool 12 that includes the mechanical interface 58 can also be referred to as the mounting section.

[0255] Both the lighting assembly 22, the spacer assembly 102 and the guide assembly 104 are compatible with this mechanical interface 58. Thus, a user can optionally use one of the lighting assembly 22,

[0256] Attach the spacer assembly 102 and guide assembly 104 to the handheld power tool 12 via the mechanical interface 58. Depending on the machining task to be performed, the user can select the most suitable component from the lighting assembly 22, guide assembly 104, and spacer assembly 102.

[0257] List of reference symbols

[0258] 10 Machine tool assembly

[0259] 12 hand-held machine tools

[0260] 14 Machine housing

[0261] 16 Handle section of the machine housing

[0262] 18 Motor section of the machine housing

[0263] 19 Grinding tool

[0264] 20 collection containers

[0265] 22 Lighting assembly

[0266] 24 carrier unit

[0267] 26 Base section of the carrier unit

[0268] 26a Base section half

[0269] 26b Base section half

[0270] 28 legs of the carrier unit

[0271] 28a thigh half

[0272] 28b Thigh half

[0273] 28c slot

[0274] 30 legs of the carrier unit

[0275] 30a thigh half

[0276] 30b thigh half

[0277] 30c slot

[0278] 32 Receiving space for a section of the hand-held machine tool

[0279] 34 side surface

[0280] 34a first section of the side surface

[0281] 34b second section of the side surface

[0282] 36 side surface

[0283] 36a first section of the side surface

[0284] 36b second section of the side surface

[0285] 38 side surface

[0286] 40 Lighting unit 42 Lighting element

[0287] 44 Light source

[0288] 46 electrical energy storage unit

[0289] 48 switching unit

[0290] 50 switches

[0291] 52 Vibration sensor

[0292] 54 electrical energy conversion units

[0293] 56 Anti-glare element

[0294] 58 mechanical interface

[0295] 60 groove

[0296] 62 Positioning element

[0297] 64 rest stops

[0298] 66 elongated projection

[0299] 68 elongated projection

[0300] 70 elongated projection

[0301] 72 Positioning element

[0302] 74 locking device

[0303] 76 locking device

[0304] 78 insertion bevel

[0305] 80 insertion bevel

[0306] 82 Guide surface

[0307] 84 apron

[0308] 86 Opening

[0309] 88 recessed grip

[0310] 90 contact surface

[0311] 92 recess

[0312] 94 Passage channel

[0313] 96 passage channel

[0314] 98 passage channel

[0315] 100 Construction kit 102 Spacer assembly

[0316] 104 Guide assembly

[0317] 106 Guide surface A Distance between the legs of the carrier unit

[0318] Bl Width of the leg of the carrier unit

[0319] B2 Width of the leg of the support unit

[0320] BB Width of the base section of the carrier unit

[0321] H Main work direction

Claims

Patent claims 1. Lighting assembly (22) for selectively fastening to a hand-held power tool (12), in particular to a hand-held grinding machine, comprising a carrier unit (24) with a base section (26) and two legs (28, 30), wherein the legs (28, 30) extend from the base section (26) on opposite sides, so that the base section (26) and the two legs (28, 30) define a receiving space (32) for receiving, in particular for non-positively and / or positively receiving, a section of the hand-held power tool (12), and a lighting unit (40) with at least one light source (44), wherein the lighting unit (40) is fastened to the carrier unit (24).

2. Lighting assembly (22) according to claim 1, wherein at least one of the legs (28, 30) is elastically deformable at least in sections and at least along a direction towards the other leg (28, 30) and / or away from the other leg (28, 30), so that the carrier unit (24) can be fastened to the hand-held power tool (12) and / or removed from the hand-held power tool (12) with elastic deformation of at least one of the legs (28, 30).

3. Lighting assembly (22) according to claim 1 or 2, wherein the base portion (26) and the two legs (28, 30) enclose a circumference of the receiving space (32) by more than 270°.

4. Lighting assembly (22) according to one of the preceding claims, wherein at least one of the legs (28, 30) has a side surface (34, 36) which faces the other leg (28, 30) and which is curved at least in sections.

5. Lighting assembly (22) according to one of the preceding claims, wherein a circumference of the receiving space (32) is curved at a transition from at least one of the legs (28, 30) to the base portion (26).

6. Lighting assembly (22) according to one of the preceding claims, wherein at least one of the legs (28, 30) comprises a locking device (74, 76) for locking the lighting assembly (22) to the hand-held power tool (12).

7. Lighting assembly (22) according to claim 6, wherein the locking device (74, 76) has at least one insertion bevel (78, 80).

8. Lighting assembly (22) according to one of the preceding claims, wherein the base portion (26) comprises a positioning element (72) for positioning the lighting assembly (22) on the hand-held power tool (12).

9. Lighting assembly (22) according to one of the preceding claims, wherein at least one of the legs (28, 30) comprises an elongated projection (66, 68) extending at least in sections along a circumference of the receiving space, which projection is designed to engage in an associated groove (60) for fastening the lighting assembly (22) to the hand-held power tool (12).

10. Lighting assembly (22) according to one of the preceding claims, wherein the lighting unit (40) comprises at least one elongate light guide element and / or a plurality of light sources (44).

11. Lighting assembly (22) according to one of the preceding claims, wherein the lighting unit (40) comprises a vibration sensor (52) which is signal-coupled to the light source (44) so ​​that the light source (44) can be operated depending on a detection result of the vibration sensor (52).

12. Lighting assembly (22) according to one of the preceding claims, wherein the lighting unit (40) comprises an electrical energy storage unit (46) which can be electrically coupled to the light source (44).

13. Lighting assembly (22) according to one of the preceding claims, wherein the lighting unit (40) comprises an electrical energy conversion unit (54) which can be electrically coupled to the light source (44).

14. Lighting assembly (22) according to one of the preceding claims, wherein the carrier unit (24) has at least one passage channel (94, 96, 98) for air.

15. Lighting assembly (22) according to one of the preceding claims, wherein the carrier unit (24) comprises at least one grip recess (88) for a human finger.

16. Lighting assembly (22) according to one of the preceding claims, wherein the carrier unit (24) comprises at least one guide surface (82) for guiding workpiece particles and / or for protecting against workpiece particles.

17. Lighting assembly (22) according to one of the preceding claims, wherein the carrier unit (24) comprises at least one contact surface (90) for placing the lighting assembly (22) against an obstacle or a workpiece section.

18. Lighting assembly (22) according to claim 17, wherein the at least one light source (44) is offset from the at least one contact surface (90) in the direction of the receiving space (32).

19. Lighting assembly (22) according to one of the preceding claims, further comprising an anti-glare element (56).

20. Lighting assembly (22) according to one of the preceding claims, wherein in a plan view along a viewing direction which is perpendicular to the directions along which the legs (28, 30) extend from the base portion (26), a width (B1, B2) of each of the two legs (28, 30) is smaller than a width (BB) of the base portion (26).

21. Machine tool assembly (10) with a hand-held machine tool (12), in particular a hand-guided grinding machine, which comprises a machine housing (14), and with a lighting assembly (22) according to one of the preceding claims, which is fastened to the hand-held machine tool (12), wherein the base section (26) of the lighting assembly (22) rests at least in sections on a front surface of the machine housing (14) facing in a main working direction (H) of the hand-held machine tool (12) and the two legs (28, 30) each rest at least in sections on oppositely arranged side surfaces of the machine housing (14) which are oriented laterally with respect to the main working direction (H).

22. Machine tool assembly (10) according to claim 21, wherein in a direction transverse to the main working direction (H) the hand-held machine tool (12) is wider than the lighting assembly (22).

23. Machine tool assembly (10) according to claim 21, wherein in a direction transverse to the main working direction (H) the lighting assembly (22) is at most 15%, preferably at most 10% or at most 5%, wider than the hand-held machine tool (12).

24. A kit (100) comprising a hand-held power tool (12), a lighting assembly (22) according to any one of claims 1 to 20, and a spacer assembly (102) comprising at least one contact surface (90) for placing the spacer assembly (102) against an obstacle or a workpiece section, wherein optionally the lighting assembly (22) or the spacer assembly (102) is fastened to a fastening section of the hand-held power tool (12).

25. The construction kit (100) of claim 24, further comprising a guide assembly (104) comprising at least one guide surface (106) for guiding the hand-held power tool (12) relative to a workpiece, wherein optionally the illumination assembly (22) or the spacer assembly (102) or the guide assembly (104) is attached to the attachment portion of the hand-held power tool (12).

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