EP2936522A2

EP2936522A2 - Induction charging device

Info

Publication number: EP2936522A2
Application number: EP13811910.2A
Authority: EP
Inventors: Marcin Rejman; Guenter Lohr; Jan Breitenbach; Juergen Mack; Dragan Krupezevic
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2012-12-21
Filing date: 2013-12-18
Publication date: 2015-10-28
Also published as: JP2016508016A; US20150349577A1; US9935483B2; KR20150097530A; CN104871392B; WO2014096048A3; KR102247147B1; WO2014096052A3; CN104871392A; JP6300822B2; EP2936649A2; DE102013226229A1; EP2936649B1; CN104995701B; WO2014096048A2; CN104995701A; WO2014096052A2; DE102013226231A1; US20150349576A1; US9923402B2

Abstract

The invention relates to an induction charging device, especially an induction charging device for a hand tool, comprising an induction charging unit (12) designed to transfer energy when coupled to an induction accumulator (14). According to the invention, the induction charging device comprises a fastening unit (16) which is at least partially designed to couple the induction charging unit (12) to the at least one induction accumulator (14) and/or to at least one external unit (18) in at least one state.

Description

Description Induction charger

State of the art

It has already been proposed an induction charging device according to the preamble of claim 1.

Disclosure of the invention

The invention is based on an induction charging device, in particular a hand tool induction charging device, with an induction charging unit, which is intended to transmit energy in a state coupled to an induction battery.

It is proposed that the induction charging device comprises a fastening unit which is at least partially provided for coupling the induction charging unit in at least one state to the at least one induction accumulator and / or to at least one external unit.

An "induction charging unit" is to be understood in this context in particular as a unit for charging the at least one induction battery, which is intended to at least partially pass a charging current through the electromagnetic induction to the induction battery in at least one charging state, and which comprises at least one inductive charging coil an "inductive charging coil" should be understood in this context, in particular a coil with at least one winding of an electrically conductive material which is intended to generate in at least one state of charge by an applied electrical energy, in particular by an AC voltage, a magnetic field generates an alternating electrical current in an inductive coil of the induction battery. In particular, the inductive charging coil is provided to convert an electromagnetic alternating field into an alternating electrical current and / or vice versa. The alternating field preferably has a frequency of 10 to 500 kHz, particularly preferably of 100 to 120 kHz. In particular, the direction perpendicular to the coil plane is formed parallel to a winding axis of the inductive charging coil.

In addition, the induction charging unit preferably comprises at least one coil core unit for increasing an inductance of the at least one inductive charging coil. The term "provided" is to be understood to mean in particular specially designed, designed and / or equipped.Assuming that an object is intended for a specific function should in particular mean that the object fulfills this specific function in at least one application and / or operating state and / or performs.

An "induction accumulator" in this context is to be understood in particular to mean a device which preferably comprises a rechargeable energy storage unit which is at least partially intended to store an energy for generating an electric current electrochemically by means of a reversible reaction and to charge it by introducing a charging current The induction battery is preferably accommodated or detachably fastened in a receiving space of the electric machine, in particular the handheld power tool The induction battery may comprise at least one NiCd or NiMh battery cell Preferably, the induction accumulator has at least one lithium-based rechargeable battery cell In this context, a "hand-held power tool" is to be understood as meaning, in particular, a hand-held electrical appliance, in particular by a user In particular a drill, a hammer drill, a saw, a planer, a screwdriver, a milling cutter, a grinder, an angle grinder and / or a multi-function tool or a garden implement such as a hedge, shrub and / or

Grass shears or another, to a professional appear appropriate

Embodiment of the electrical appliance to be understood.

In this context, an "external unit" should be understood as meaning, in particular, a unit which is preferably designed completely separate from the induction charging unit and is not necessary for operation of the induction charging unit. The external unit may preferably be at least partially formed by a workbench, a tool box, a tool box holder, a tool holster and / or another external unit that appears to be suitable for a person skilled in the art. By "coupling" should be understood in this context, in particular the production of a preferably releasable connection, wherein a holding force between two components preferably by a geometric engagement of the components into one another and / or a frictional force between the components is transmitted.

Due to the inventive design of the induction charging a preferably high flexibility and an advantageous ease of use can be achieved in a structurally simple manner.

It is also proposed that the fastening unit is at least partially formed separately from the induction charging unit. In this context, the term "at least partially disconnected" is to be understood in particular as meaning that the fastening unit and the induction charging unit have no common components that are essential for operation.

In addition, it is proposed that the fastening unit has at least one fastening frame which at least partially encloses the induction charging unit in at least one mounted state. By "at least partially enclose" is to be understood in this context that the mounting frame in at least one plane, preferably in at least two, in particular mutually perpendicular planes, and more preferably in three, in particular mutually perpendicular planes over an angular range of more as 180 °, preferably more than 270 °, particularly preferably of 360 °, the induction charging unit surrounds. In particular, the attachment frame preferably covers at most 70%, preferably at most 60%, preferably at most 50% and particularly preferably at most 40% of a surface of the induction charging unit. As a result, a preferred weight and space-saving design of the fastening unit can be achieved.

Furthermore, it is proposed that the at least one fastening frame comprises at least two frame elements which are at least partially interconnected. The at least two frame members are preferably positively and / or non-positively connected. In a particularly preferred embodiment, the at least two frame members are bolted together. However, it is also conceivable that the at least two frame elements are locked together or connected to another, a person skilled in the sense appearing manner. Alternatively or additionally, it is also conceivable to connect the at least two frame members in a material-locking manner. This allows a structurally simple design of the mounting frame and an advantageously low production cost can be achieved.

It is also proposed that the at least one mounting frame forms a receiving area for receiving the induction charging unit and a receiving area for receiving the induction battery. Preferably, the mounting frame at least partially encloses the induction accumulator and the induction charging unit in a coupled state. By "at least partially enclose" is to be understood in this context that the mounting frame in at least one plane, preferably in at least two, in particular mutually perpendicular planes, and more preferably in three, in particular mutually perpendicular planes over an angular range of more as 180 °, preferably more than 270 °, particularly preferably of 360 °, the induction accumulator and the induction charging unit surrounds. In particular, the attachment frame preferably covers at most 70%, preferably at most 60%, preferably at most 50% and particularly preferably at most 40% of a surface of the induction charging unit. As a result, a preferably compact embodiment of the induction charging device can be achieved.

In addition, it is proposed that the fastening unit comprises at least one fastening element which is fixedly arranged on a housing of the induction charging unit. In this context, the term "fixedly arranged" is to be understood in particular to mean that the at least one fastening element is at least partly captively coupled to the housing of the induction charging unit, at least in a state of charge.

Furthermore, it is proposed that the at least one fastening element is at least partially formed as a groove. This allows a structurally simple, partly robust and preferably inexpensive embodiment of the fastening unit can be achieved.

It is also proposed that the induction charging device has at least one holding element, which is formed at least partially corresponding to the mounting frame. As a result, an advantageously compact embodiment of the induction charging device can be achieved.

In addition, it is proposed that the at least one fastening element is designed as a retaining lela. In this context, a "holding lug" is to be understood as meaning, in particular, an element which at least partially has a planar shape, a thickness being in particular not more than 50%, preferably not more than 30% and particularly preferably not more than 10% of a smallest extension in a main extension plane Holding tab is, and which is at least partially provided at least for a positive fastening of the induction battery at least in a coupled state.

Furthermore, it is proposed that the at least one retaining element designed as a fastening element is detachably connected to the housing of the induction charging unit. By "releasably connected" is meant in this context in particular "non-destructively separable". As a result, advantageously high flexibility and usability of the induction charging unit can be achieved both with the at least one fastening element formed as a holding lug and without the at least one fastening element designed as a holding lug.

It is also proposed that the at least one retaining element designed as a retaining element is mounted at least partially resiliently relative to the housing of the induction charging unit. In this context, the term "resiliently mounted" is to be understood in particular as meaning that the at least one securing element formed as a holding lug is repeatedly deformable relative to the housing of the induction charging unit, in particular without mechanical damage and / or destruction, and in particular automatically after a deformation As a result, an advantageously high level of user comfort can be achieved, as well as damage to the at least one retaining lug trained fastener to be avoided in an impact after a fall of the induction charging unit.

In addition, a system is proposed with an induction charging device according to the invention and with at least one induction accumulator, in particular with at least one hand tool induction accumulator.

Furthermore, an induction charging unit, in particular a hand tool induction charging unit, an induction charging device according to the invention is proposed. Furthermore, a fastening unit of an induction charging device according to the invention is proposed.

In a further refinement, the invention can start from a system, preferably from a charging system, in particular from an inductive charging system, with a fastening unit and an induction charging unit. The fastening unit comprises a system holder. It may be proposed that the system holder limits a receiving area, which is provided for receiving the induction charging unit and a charging interface of a device to be charged, in particular the induction battery. In this context, a "charging system" is to be understood in particular to mean a device which is intended to transfer electrical energy from an induction charging unit to the device, which is designed at least partially as an induction battery and is provided in particular for charging a battery unit integrated into the device and to store the device at least during the charging process. In a particularly preferred embodiment, the battery unit comprises the induction battery

In this context, the term "rechargeable battery unit" is to be understood as meaning, in particular, an electrical energy store The rechargeable battery unit may have at least one NiCd or NiMh rechargeable battery cell

lithium-based battery cell on.

In this context, an "inductive charging system" is to be understood as meaning, in particular, a charging system in which the energy is transferred inductively from an induction charging unit to the device, in particular to the induction battery electromagnetic field and the device, in particular In particular, the induction battery may include at least one coil provided to receive the electromagnetic field and convert it into an alternating current. Preferably, the device, in particular the induction battery, a charging electronics, which is intended to equalize the AC and to regulate a current and / or voltage for the charging of the battery unit according to a state of charge of the battery unit.

In this context, a "charging interface" is to be understood as meaning, in particular, a region of the device, in particular of the induction battery, which is used for transmitting energy to the device and mounting the device, in particular the device

Induction accumulator is provided. The charging interface preferably has a defined geometry tailored to the system. Particularly preferably, the charging interface is designed symmetrical. In this context, a device battery and / or battery pack, in particular, is to be understood by a "device"

Hand tool battery, and / or a hand tool with integrated

Battery unit and particularly preferably an induction accumulator are understood. The induction accumulator preferably has a user-detachable interface for connecting the induction accumulator to a handheld power tool. In this context, a "hand tool" should be understood to mean, in particular, a user-guided electric appliance, such as a drill, a hammer drill, a saw, a planer, a screwdriver, a milling cutter, a grinder, an angle grinder and / or a multifunctional tool or a garden implement, such as a hedgerow, shrub and / or grass shears, and / or a lighting device, in particular a flashlight, and / or a measuring device, in particular a laser rangefinder understood.

The system holder is advantageously made in one piece and formed by a plastic material. The "system holder" can advantageously accommodate the induction charging unit and the device to be charged, in particular the induction battery, and ensure a suitable position for charging between the induction charging unit and the device, in particular the induction battery In particular, the system may be capable of charging a variety of different devices, such as induction batteries, handheld power tool batteries, and handheld power tools with integrated battery pack having a charging interface adapted to the system Advantageously, the system may be suitable for use with one hand - machine tool battery used, in particular induction accumulator, charge and position the hand tool battery with the power tool. A removal of the hand tool battery from the hand tool during loading can be omitted. Advantageously, the system can comprise a plurality of different induction charging units.

The number of different devices, especially induction batteries, that can be charged with the system can be further increased. The system can be used to charge devices of different shape, size, voltage class, battery pack size and ground.

Further, it may be proposed that the system holder has a fastening means which is provided to store the system in an operational state about at least one pendulum axis movable hanging. In this context, a "ready-to-operate state" is to be understood in particular to mean a state in which the system is suitable for charging the device, in particular the induction accumulator In particular, the induction charging unit and the charging interface of the device, in particular of the induction accumulator, are in an operational state , arranged in the receiving area of the system holder and the induction charging unit and the induction accumulator positioned by the system holder to each other.

In this context, a "hanging" bearing is to be understood as meaning, in particular, a bearing in which a weight force acting on the system is compensated for by a force acting on the fastening means, in particular a tensile force In particular, stirrups may be formed on which the system can be suspended, for example, on a nail, an eyelet or a similar device. "In this context," movable about a pendulum axis "is to be understood in particular as meaning that only small moments around this axis in a suspended state be transmitted. In this context, a "small" moment should in particular be understood to mean a moment which permits a pendulum movement of the system about the pendulum axis, so that the suspended system can move about this axis to a position in which the suspended mounting about this axis is free of moment Forces, and in particular moments required for a hanging bearing, can be particularly small. An attachment means for supporting the system can be subjected to particularly low forces and moments. The storage can be particularly robust and secure. The system can accommodate the charging interface of extra large and / or heavy equipment and induction chargers. Devices, in particular induction accumulators, with a particularly wide range of different housing shapes and / or masses and / or centers of gravity can be charged with the system. The system can autonomously align with the pendulum axis according to the center of gravity of the device to be charged, in particular induction battery. The system may be particularly well suited for storing and / or storing the devices, in particular the induction accumulators. Particularly preferably, the fastening means can be rotatably mounted on the system holder about the pendulum axis. The suspended system can rotate with the device to be charged, in particular the induction battery to be charged, particularly well in relation to the fastening means in a position in which a torque-free hanging storage of the system on the fastening means is possible.

It may be proposed that the fastening means is arranged at least substantially on a side facing away from the receiving area of the system holder. In this context, "at least substantially" should be understood to mean that, in particular, a region of the fastening means which is intended to suspend the system can be arranged on the side of the system holder facing away from the receiving region, at least in a suspended state of the system It can be advantageously ensured that a housing geometry of a device to be charged, in particular of the induction battery to be charged, overlaps with the attachment means.

It can also be proposed that the receiving area has bearing means for supporting the induction charging unit and the charging interface of the device to be charged, in particular the induction battery to be charged. Preferably, the bearing means are provided for a positive mounting of the induction charging unit and / or the charging interface. The system holder can ensure the position of the induction charging unit to the charging interface particularly effective. It can further be proposed that the bearing means are provided to store the induction charging unit and the charging interface spaced around an air gap. In this context, an "air gap" is to be understood as meaning, in particular, a vertical distance between the opposite sides of the induction charging unit and the charging interface, the air gap preferably being 1 to

5 mm, more preferably 2.5 mm to 3.5 mm. The air gap can ensure a particularly simple and / or ergonomic insertion and / or removal of the device, in particular of the induction battery, with the charging interface. In particular, the bearing means may be designed so that the device, in particular the induction accumulator, with the charging interface relative to the system holder has a game, so that the precision with which the device, in particular the induction battery, must be used, can be reduced. A collision of the charging interface with the induction charging unit when inserting the device, in particular the induction battery, can be avoided.

It can also be proposed that the receiving area for receiving the induction charging unit and the charging interface is provided in a common insertion direction. The receiving area for mounting the induction charging unit and / or the charging interface may preferably have projections, in particular rails, onto which the induction charging unit and / or the charging interface can be pushed. The induction charging unit and / or the charging interface may have grooves, grooves and / or shoulders, which are intended to be supported on the projections and / or rails of the receiving area. A particularly simple, effective, cost-effective and robust storage of the charging interface and / or the induction charging unit by the system holder may be possible. The

Inserting the induction charging unit and / or the charging interface into the receiving area of the system holder can be particularly simple.

Furthermore, it can be proposed that at least one of the bearing means has securing means which are provided for the induction charging unit and / or the

Fix the charging interface in a loading position. In particular, the bearing means can have heels and / or steps which are provided to fix the induction charging unit and / or the charging interface in a form-fitting manner in the loading position. The induction charging unit and / or the charging interface preferably has corresponding recesses into which the shoulders and / or steps of the bearing means of the receiving area of the system holder engage in the loading position. Preferably, the Positive locking of paragraphs and / or steps with the recesses in a suspended state of the system by lifting the induction charging unit and / or the charging interface against the weight can be solved. The device, in particular the induction accumulator, with the charging interface and / or the induction charging unit can be advantageously removed by lifting against the weight and pushing out. In a suspended state, the weight force can ensure the positive connection of the securing means and the loading position. A particularly safe, simple and inexpensive design of the securing means may be possible. It can further be proposed that the receiving area is intended to receive the induction charging unit and / or the device, in particular the induction battery, in at least two orientations. In particular, the receiving area can be provided to receive the induction charging unit and / or the device, in particular the induction accumulator, with respect to the insertion direction of two opposite sides and / or in two opposite to an axis perpendicular to the insertion direction by 180 ° and rotated to the pendulum axis To take orientation. Using the system can be particularly convenient. In particular, the induction charging unit and / or the device, in particular the induction battery, can be used by a side which is particularly convenient for the user. It can be avoided that the induction charging unit and / or the

Device accidentally used in an improper orientation.

Further, it may be proposed that the receiving area encloses the induction charging unit about an axis by more than 180 °. In particular, the induction charging unit can be arranged completely in an operating state with the exception of a power supply line within the receiving area. The induction charger can be protected particularly well by the system holder. The induction charging unit can form a compact unit with the system holder. It can also be suggested that the system has a

Hand tool battery, in particular an induction accumulator, and / or a rechargeable hand tool with the charging interface comprises. The charging interface can be matched to the system holder and / or the induction charging unit. The handheld power tool battery, in particular the induction accumulator, preferably has a device interface that is independent of the charging interface

Connection of the hand tool battery, in particular of the induction battery lators, with a hand tool on. The charging interface and the device interface are particularly advantageously arranged on opposite sides of the handheld power tool battery, in particular of the induction accumulator. The charging interface can be particularly easily accessible in the device interface parts connected to the handheld power tool. In particular, the

Handheld power tool battery, in particular the induction accumulator, are inserted with the charging interface in the system and simultaneously connected to the device interface with an interface of the power tool. The portable power tool battery, in particular the induction battery, can be inserted together with the power tool in the system.

Hand tool battery, in particular induction accumulator, and hand tool can be stored together with the system and / or charged. In addition, it is conceivable that the at least one mounting frame at least two

Having bearing lugs which engage in the at least one groove formed as a fastening element of the induction charging unit for guiding the bearing lugs during a insertion operation in a direction of insertion. The induction charging unit can be mounted in an inserted state on the mounting frame at least substantially by the bearing lugs. The mounting frame may comprise at least one fastening element with at least one of the bearing lugs and with at least one spring element which resiliently arranges the bearing lugs at least substantially perpendicular to the insertion direction. The grooves of the induction charging unit can exert a force on the bearing lugs, which at least partially compresses the bearing lugs, at least in an inserted operating state. In particular, the attachment frame may be mounted on the induction charging unit at least substantially by the forces exerted by the grooves on the bearing lugs forces. By "at least substantially" is to be understood in this context, in particular, that the forces exerted on the bearing lugs make up more than 75%, preferably more than 90%, of the forces acting between the fastening frame and the induction charging unit.

In this context, a "bearing nose" is to be understood as meaning, in particular, a projection which is provided for positively and in particular positively locking mounting of the fastening frame on the groove of the induction charging unit be understood that is introduced in particular in at least part of a housing and which is provided for receiving and force and in particular positive locking bearing lugs. Preferably, the mounting frame can be mounted exclusively on the bearing lugs on the at least one groove of the induction charging unit. Preferably, the induction charging unit has at least two perpendicular to

Insertion direction oppositely arranged grooves on. Advantageously, at least two, particularly advantageous in each case exactly two of the bearing lugs of the mounting frame are provided to be inserted into a groove of the induction charging unit. It is possible that the mounting frame and the induction charging unit have further components which generate bearing forces, such as stop means and / or interfaces. In particular, the induction charging unit may have an electrical battery interface, which causes additional bearing forces in addition to an electrical contact of the induction charging unit. In this context, the term "insertion direction" is to be understood as meaning, in particular, a preferably rectilinear direction along which the bearing lugs of the fastening frame can be inserted into the groove of the induction charging unit is to generate a restoring force in a deflection in a spring direction. A deflection of the spring element and / or the bearing nose during the insertion process may be at least 0.1 mm, preferably 0.5 mm and particularly preferably more than 1 mm. There may be an advantageous compensation of a bearing clearance between the bearing lugs and grooves. The storage of the induction charging unit on the mounting frame may have a bias and be free of play. Mechanical tolerances can be compensated. A positioning of the mounting frame and the induction charging unit to each other can be particularly well reproduced in several insertion processes and have particularly small deviations from each other. Other bearing means which engage in the grooves, in particular bearing rails, can be omitted.

It is proposed that the grooves of the induction charging unit for guiding the mounting frame exert a force on the bearing lugs during the insertion process, which at least partially compresses the bearing lugs. The bearing lugs can be supported on the grooves during the insertion process. Tilting of the induction charging unit when inserted into the mounting frame can be avoided become. The induction charging unit is preferably centered during the insertion process on the mounting frame. Jamming of the mounting frame and the induction charging unit during insertion can be avoided. Dimensional deviations of the grooves, in particular due to dirt deposits, can be compensated. Preferably, the induction charging unit can be guided on the mounting frame during the insertion process at least predominantly by the bearing lugs, particularly preferably exclusively by the bearing lugs. Preferably, the mounting frame is during the insertion process exclusively with their bearing lugs with the grooves of the induction charging in contact. Further guide means which engage in the grooves, in particular guide rails, can be omitted.

Particularly advantageously, a plurality of spring elements are provided which each spring a bearing nose. Preferably, the bearing lugs are resiliently supported by the spring elements. The bearing lugs can advantageously spring in independently of one another. Loading forces on the bearing lugs can be particularly uniform. Jamming of individual bearing lugs and / or a bearing clearance on individual bearing lugs can be avoided.

It is further proposed that the grooves have at least one latching recess, into which at least one of the bearing lugs engages in the inserted operating state. Preferably, the grooves each have a latching recess in a storage position of the bearing lugs. In this context, a "detent recess" is to be understood as meaning, in particular, a depression of the groove into which the bearing nose is urged by the restoring force of the spring element.

A user can release the mounting frame from the induction charging unit by applying a force to the induction charging unit opposite to the insertion direction which exceeds a force necessary to push the bearing lugs out of the grooves and release the latching connection. The force that is necessary to solve the locking connection, inter alia, by the depth and geometry of the

Locking recesses are set appropriately.

It is further proposed that the grooves have an at least substantially circular or parabolic groove profile. In this context, a "groove profile" is to be understood as meaning, in particular, a geometry of a cross section perpendicular to the direction of insertion In this context, in particular be understood that a reason of the groove is circular or parabolic. By "at least substantially" is meant in this context a deviation from the circular and / or parabolic shape of less than 20%, preferably less than 10% and particularly preferably less than 5% of a groove depth of the groove The bearing nose can advantageously be centered in the groove by the restoring force of the spring elements, in a further embodiment of the bearing lugs these can have a tapering profile , which may be rounded off on the sliding surface of the respective bearing nose

Sliding surface can be particularly small. An insertion of the induction charging in the mounting frame can be designed very smooth.

In an alternative embodiment of the invention, it is proposed that the grooves have an edge parallel to a rack plane. In this context, a "insertion level" is to be understood as meaning, in particular, a plane formed by the insertion direction and the spring directions of the bearing lugs, preferably a further flank of the groove opposite the insertion plane, in particular by 45 ° to 80 ° and particularly preferably by 55 ° The bearing lugs preferably have a sliding surface profile adapted to the groove, with an edge parallel to the insertion plane and an edge inclined with respect to the insertion plane The bearing lugs can be guided particularly precisely in the grooves and the induction charging unit relative to one another, perpendicular to the bearing edges parallel to the insertion direction, can be maintained particularly accurately., Compressive forces in the direction of the parallel flanks of the grooves and / or the bearing lugs can be received particularly well.

Furthermore, it is proposed that the bearing lugs are movably mounted along a direction extending at least substantially parallel to the insertion plane. In this way, a particularly compact, in particular a flat construction, embodiment of the mounting frame can be realized, which requires little space.

It is further proposed that the grooves along the insertion direction have an at least substantially constant groove profile. A "constant" groove profile is to be understood in this context in particular a groove cross-section is formed at least substantially constant over at least 70% of a groove length, preferably over at least 80% of the groove length and particularly preferably over more than 90% of the groove length. In this context, "at least essentially" is to be understood as meaning, in particular, production-related deviations which amount to less than 10%, preferably less than 5% and particularly preferably less than 1% of the groove depth In particular, chamfers and chamfers intended to introduce the bearing lugs into the grooves may in particular constitute less than 10%, and preferably less than 5% of the groove length The induction charging unit may be guided particularly uniformly on the mounting frame during the insertion process. In particular, it may be possible to insert the induction charging unit on both sides into the mounting frame. "Double-sided" should in this context be understood in particular to mean that both insertion slots parallel to the slots are allowed.

It is further proposed that the spring elements are designed as bar spring elements on which the bearing lugs are arranged. Preferably, the bearing lugs are formed integrally with the bar spring elements. The rod spring elements can absorb particularly large forces transversely to the spring direction. The rod spring elements may be particularly suitable to spring in the spring direction and to support the bearing lugs in the other directions. Particularly advantageously, the spring elements are integrally formed with the mounting frame. In particular, the spring elements can be integrally connected to the bearing lugs with the mounting frame. Preferably, the mounting frame may be at least partially formed by a plastic component, in particular a plastic component produced in an injection molding process. The mounting frame can be particularly inexpensive and / or robust. An assembly effort of

Mounting frame can be particularly low. It can be avoided that release spring elements and / or bearing lugs from the mounting frame.

In addition, it is proposed that at least two bearing lugs, viewed along the insertion direction, are arranged one behind the other. Thus, advantageously a secure fastening can be made possible. The induction charging device according to the invention should not be limited to the application and embodiment described above. In particular, in order to fulfill a mode of operation described herein, the induction charging device according to the invention can have a number deviating from a number of individual elements, components and units mentioned herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawing, several embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 shows a system with an induction charging unit of an induction charging device according to the invention and with an induction battery in a perspective view,

2a shows the induction charging device according to the invention with the induction charging unit and with a fastening unit in a perspective view,

2b a fastener of the fastening unit of the invention

Induction charging device in a perspective view,

3a shows the induction charging device according to the invention in a front view, FIG. 3b shows the induction charging device according to the invention in a state coupled to an external unit in a front view,

4 shows an alternative embodiment of the induction charging device according to the invention with an induction charging unit and with an alternative fastening unit in a state coupled to an induction battery,

Fig. 5a shows a mounting frame of the alternative fastening unit in a

Front view 5b shows the mounting frame of the alternative fastening unit in a rear view,

6a a fastening element of the mounting frame of the alternative fastening unit in a schematic sectional view,

6b, the fastening element of the mounting frame of the alternative fastening unit in an assembled state of the mounting frame in a schematic sectional view,

7a is a schematic representation of the fastening element of the mounting frame and a groove of the induction charging unit with a latching recess in an alternative embodiment,

7b is a schematic representation of the fastening element of the mounting frame and the groove of the induction charging unit with a Rastaus- recess in the alternative embodiment in an assembled state of the mounting frame,

8a is a schematic representation of an alternative profile variant of the groove and the bearing nose in a schematic sectional view,

8b is a schematic representation of a further alternative profile variant of the groove and the bearing nose in a schematic sectional view,

8c is a schematic representation of a further alternative profile variant of the groove and the bearing nose in a schematic sectional view,

9 shows a schematic illustration of an alternatively configured system with a fastening unit comprising a system holder, an induction charging unit and with an induction accumulator,

10 shows a schematic representation of the system holder of the fastening unit with the induction charging unit in a perspective view,

1 1 is a schematic representation of the system holder of the fastening unit with the induction charging unit and with the induction accumulator in a front view,

12 shows a schematic representation of the system holder of the fastening unit,

13 is a schematic representation of the induction charging unit in a perspective view,

14 is a schematic representation of a charging interface of the induction battery in a perspective view,

15 is a schematic representation of the induction battery in a front view, 16 is a schematic representation of the system in a suspended storage with an induction battery used in a side view,

17 shows a schematic representation of the system in the case of a suspended storage with a hand milling machine with an induction accumulator inserted in a side view,

18 shows a schematic representation of the system in a suspended mounting with a drill driver with an induction battery inserted in a side view,

19 shows a schematic representation of the system in a suspended mounting with an angle grinder with an induction battery inserted in a side view,

20 is a schematic representation of the system in a suspended storage with a jigsaw with an induction battery inserted in a side view,

Fig. 21 is a schematic representation of the system in a suspended storage with a hammer drill with an induction battery used in a side view and

Fig. 22 is a schematic representation of an alternative use of the

Induction charging unit with the induction battery without using the system holder of the fixing unit.

Description of the embodiments

FIG. 1 shows a system 90g with an induction charging unit 12a and with an inductance accumulator 14a. The induction charging unit 12a is provided to electrically charge the inductance battery 14a in a state of charge. The induction accumulator 14a is designed as a hand tool induction accumulator. The induction battery 14a is inductively chargeable by means of the induction charging unit 12a. The induction accumulator 14a is coupled to the induction charging unit 12a. The induction charging unit 12a is provided to transfer energy to the induction battery 14a in a state coupled to the induction battery 14a. The induction charging unit 12a is designed as a hand tool induction unit. The induction charging unit 12a is designed as an induction charger. The induction charging unit 12a has a charging coil, not shown, and a Housing 30a on. The housing 30a encloses the charging coil. The charging coil is provided for inductive energy transfer in a state of charge to the induction battery 14a. The housing 30a of the induction charging unit 12a has a receiving portion 36a provided for receiving the induction battery 14a in a coupled state. The receiving area 36a forms a charging interface 94a of the induction charging unit 12a, via which the electrical energy can be transmitted to the induction battery 14a. The induction battery 14a also includes a housing 44a having a positioning member 46a for coupling the induction battery 14a to the receiving portion 36a of the housing 30a of the induction charging unit 12a in a coupled state. The positioning member 46a of the induction battery 14a is formed as a pedestal rising above an outer surface of the adjacent case 44a of the induction battery 14a. However, it is also conceivable that the positioning element 40 of the induction charging unit as a pedestal and the positioning element 46 of the induction battery are formed as a recess. The positioning element 46a of the induction battery 14a designed as a pedestal forms a charging interface 96a of the induction battery 14a. The receiving area 36a of the housing 30a of the induction charging unit 12a has at least one recess 38a. The recess 38a has a shoulder height of at least 0.5 mm. The receiving portion 36a of the housing 30a of the induction charging unit 12a has a plurality of recesses 38a. The recess 38a forms a positioning element 40a for positioning the induction battery 14a. The positioning element 46a of the induction battery 14a has a shoulder height of at least 0.5 mm. The positioning member 40a of the induction charging unit 12a and the positioning member 46a of the induction battery 14a are formed correspondingly. However, it is also conceivable that the positioning element 40a of the induction charging unit 12a are formed as a pedestal and the positioning element 46a of the induction battery 14a as a recess.

The positioning element 40a of the induction charging unit 12a and the positioning element 46 of the induction battery 14a each have a heel height of 3 mm. However, other dimensions which appear reasonable to a person skilled in the art are also conceivable. The positioning element 40a of the induction charging unit 12a has a partially curved outer contour. The outer contour of the positioning element 40a of the induction charging unit 12a is round. The positioning element 46a of the induction Cumulator 14a has a partially curved outer contour. The outer contour of the positioning element 46a of the induction battery 14a is square with rounded corners. A diameter of the positioning element 40a of the induction charging unit 12a corresponds to at least almost a diagonal length of the

Positioning element 46a of the induction battery 14a. Between the dimensions of the positioning member 40a of the induction charging unit 12a and the

Positioning element 46a of the induction battery 14a is provided a small tolerance. The depths and the tolerances of the positioning elements 40a, 46a of the induction charging unit 12a and of the induction battery 14a must be matched to each other for an optimum feel for an operator. Alternatively, it is also conceivable that the outer contour of the positioning element 40a of the induction charging unit 12a square with rounded corners and the outer contour of the

Positioning element 46a of the induction battery 14a are formed round. Furthermore, it is also conceivable for the outer contour of the positioning element 40a of the induction charging unit 12a or of the positioning element 46a of the induction battery 14a to have another geometric form, which appears meaningful to a person skilled in the art, in particular with rounded corners.

The receiving region 36a of the housing 30a of the induction charging unit 12a has at least one further depression 48a. The further recess 48a forms

Dirt removal element 42a. The receiving area 36a comprises a plurality of further depressions 48a designed as dirt removal elements 42a. The recesses 38a, 48a form a structuring of a part of the surface of the housing of the induction charging unit 12a. The Schmutzabführelemente 42a are formed channel-shaped. The Schmutzabführelemente 42a are formed laterally open, so that the dirt can fall out. The Schmutzabführelemente 42a are also formed open at the top. The Schmutzabführelemente 42 a have a rectangular cross-section. The Schmutzabführelemente 42 a have a greater heel height to the surface of the housing 30 a of the induction charging unit 12 a as the positioning member 40 a. When viewed parallel to the surface of the housing 30a of the induction charging unit 12a, the outer contour of the positioning element 40a encloses the dirt removal elements 42a. In a state of charge of the induction battery dust and dirt particles, which are deposited within the receiving area 36a of the induction charging unit 12a, can be removed by means of dirt removal elements 42a. The

Schmutzabführelemente 42 a each have a heel height of 5 mm. Further, the induction charging unit 12a has a display unit 72a provided to output information to an operator. The display unit 72a is provided for optically outputting information. In a state of charge, an operator may retrieve information about a state of charge of the induction battery 14a to the display unit 72a. The display unit 72a includes a display

74a and a plurality of LEDs 76a. Alternatively or additionally, however, other embodiments of the display unit 72a are conceivable. The display unit 72a is disposed on a front side of the housing 30a of the induction charging unit 12a. The display unit 72a is disposed at the front side of the housing 30a of the induction charging unit 12a formed slanted relative to an insertion direction. As a result, readability of the display unit 72a can also be achieved in a state of the induction charging unit 12a, for example, inserted in a workbench.

FIG. 2a shows an induction charging device 10a with the induction charging unit 12a and with a fixing unit 16a provided for coupling the induction charging unit 12a in a coupled state to the induction battery 14a. The fastening unit 16a has at least one fastening element 28.1a, 28.2a, which in a coupled state is fixedly arranged on the housing 30a of the induction charging unit 12a. The fastening unit 16a has two fastening elements 28.2a, which are designed as retaining tabs 34a. The fastening elements 28.2a are captively secured to the housing 30a of the induction charging unit 12a. The fasteners 28.2a are detachably connected to the housing 30a of the induction charging unit 12a. However, it is also conceivable that the retaining tabs 34a are fixed and not detachably connected to the housing 30a of the induction charging unit 12a. The fasteners 28.2a are secured to the induction charging unit 12a on opposite sides of the housing 30a. The

Fasteners 28.2a are formed of plastic. The Schmutzabführelemente 42 a extending between the retaining tabs 34 a formed as fastening elements 28.2 a. Each fastener 28.2a has a first portion 50a that extends in an assembled state parallel to the side of the housing 30a of the induction charging unit 12a where the fastener 28.2a is disposed. Each fastening element 28.2a has a further region 52a which extends perpendicular to the first region 50a and parallel to the receiving region 36a of the induction charging unit 12a (FIG. 2b). To a mounting of the induction battery 14a on the induction charging unit 12a, to which the fastening elements 28.2a of the fastening unit 16a are attached, the induction battery 14a is pushed onto the induction charging unit 12a in the direction of insertion 54a. In this case, the positioning element 46a of the induction battery 14a covers the positioning element 40a of the induction charging unit 12a. The insertion direction 54a is parallel to a

Main extension direction of the induction charging unit 12a. When the induction battery 14a is pushed into the fastening unit 16a of the induction charging device 10a, the fastening elements 28.2a of the fastening unit 16a engage with their further regions 52a in each case a retaining element 56a which is integrally formed on the housing 44a of the induction battery 14a. The further regions 52a of the fastening elements 28.2a engage over the retaining elements 56a of the induction accumulator 14a transversely to the direction of insertion 54a.

The positioning element 46a of the induction battery 14a contacts a surface of the housing 30a of the induction charging unit 12a when the induction battery 14a is pushed open. Once the induction battery 14a is pushed onto the induction charging unit 12a so that the positioning member 46a of the induction battery 14a is located above the receiving portion 36a of the induction charging unit 12a, the positioning member 46a of the induction battery 14a latches into the positioning member 40a of the induction charging unit 12a. The latching is haptically perceived by an operator and signals the operator an optimal for inductive charging positioning of the induction battery 14a relative to the induction charging unit 12a. The further regions 52a of the fastening elements 28.2a press the induction accumulator 14a perpendicular to the insertion direction 54a via the retaining elements 56a to the induction charging unit 12a. The holding elements 56a are formed by projections. By means of the positioning elements 40a, 46a and the fastening elements 28.2a, the induction accumulator 14a is positively and non-positively coupled to the induction charging unit 12a. The fastening elements 28.2a formed as retaining tabs 34a are resiliently mounted relative to the housing 30a of the induction charging unit 12a, so that the fastening elements 28.2a press the induction accumulator 14a perpendicular to the housing 30a of the induction charging unit 12a. The fastening elements 28.2a formed as retaining tabs 34a are mounted on the housing 30a of the induction charging unit via a double spring arrangement (not shown). The as retaining tabs

34a formed fasteners 28.2a are detachably attached to the housing 30a of Induction charging unit 12a attached. The fastening elements 28.2a are spring-mounted so that, in the event of impact after a fall of the induction charging unit 12a, the fastening elements 28.2a preferably do not break off but cushion the impact or preferentially detach from the housing 3a0 of the induction charging unit 12a in a non-destructive manner.

The fixing unit 16a is further provided to couple the induction charging unit 12a in a state with at least one external unit 18a. For this purpose, the fastening unit 16a, a further fastening element 28.1 a, which is provided on the housing 30a of the induction charging unit 12a (Figure 3a). The further

Fastener 28.1 a is formed as a groove 32a. The fastening unit 16a has two further fastening elements 28.1a, which are formed as a groove 32a. The further, designed as a groove 32a fasteners 28.1 a are inserted into the housing 30a of the induction charging unit 12a. The grooves 32a are fixed to the induction charging unit 12a on opposite sides of the housing 30a. The grooves 32a are parallel to the main extension direction of the induction charging unit 12a. The grooves 32a are provided to the induction charging unit 12a in a receiving area of the external unit 18a, such as a workbench, a toolbox, a tool box holder, a tool holster and / or another external unit that appears to be useful to a person skilled in the art, by means of a tongue and groove To fix connection (Figure 3b). The further fastening elements 28.1 a can also be formed by a dovetail groove. In addition, latching elements can be provided which are provided for latching in a coupled state of the induction charging unit 12a with the external unit 18a.

FIGS. 4 to 22 show further exemplary embodiments of the invention. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, wherein, with regard to identically named components, in particular with regard to components having the same reference numbers, in principle also to the drawings and / or the description of the other embodiments, in particular FIGS to 3b, can be referenced. To distinguish the embodiments, the reference numerals of the embodiment in Figures 1 to 3b, the letter a and the reference numerals of the embodiments in Figures 4 to 22, the letters b to g readjusted. FIG. 4 shows an induction charging device 10b with an induction charging unit 12b and with a fixing unit 16b. The induction charging unit 12b corresponds to the induction charging unit 12a already described. The fixing unit 16b is partially formed separately from the induction charging unit 12b. The fastening unit 16b has a fastening frame 20b, which is formed separately from the induction charging unit 12b and which at least partially encloses the induction charging unit 12b in an assembled state. The mounting frame 20b completely encloses the induction charging unit 12b in an assembled state. The mounting frame 20b has two interconnected frame members 22.1b, 22.2b. The frame elements 22.1 b, 22.2b are positively connected to each other. The frame members 22.1 b, 22.2b are bolted together. However, other connections that appear meaningful to a person skilled in the art between the frame elements 22.1b, 22.2b are also conceivable. In principle, it is also conceivable that the mounting frame 20b is formed as a single solid component. The fastening frame 20b is formed from a plastic. The mounting frame 20b is provided for mounting an induction battery 14b during a state of charge on the induction charging unit 12b. The induction accumulator 14b corresponds to the induction accumulator 14a already described. The mounting frame 20b has a support 58b formed by one of the frame elements 22.1b, 22.2b, over which two side brackets 60b and on one side a retaining bracket 62b extending transversely thereto rise (FIGS. 5a and 5b). The headband 62b extends between the side bars 60b. The mounting frame 20b forms a receiving portion 24b for receiving the induction charging unit 12. The inductive charging unit 12b is placed on the support 58b and is then within the

Attachment frame 20b arranged. The mounting frame 20b forms a receiving area 26b for receiving the induction battery 14b. Opposite the retaining clip 62b, a side of the fastening frame 20b designed as an insertion opening 64b is arranged, which is provided for insertion of the induction accumulator 14b into interlocking elements 66b and onto the receiving region 36b of the induction charging unit 12b (FIG. 4). The interlocking elements 66b are designed to encompass the holding elements 56b of the housing 44b of the induction accumulator 14b during the state of charge from above, so that the induction accumulator 14b is secured in a position on the receiving region 36b of the induction charging unit 12b. The holding elements 56b of the induction charging unit 12b are formed at least partially corresponding to the mounting frame 20b. Alternatively or In addition, it is also conceivable that the fastening frame 20b has ten fastening elements 78b, which are intended to engage in the fastening elements 28.1b designed as grooves 32b. FIG. 5a shows the attachment frame 20b separately in a view from the front, in a view directed toward the insertion opening 64b, and FIG. 5b shows the attachment frame 20b separately in a view from behind.

The mounting frame 20b has a mounting portion 68b, which is provided to attach the mounting frame 20b, for example, to a workbench or to a tool box. The attachment portion 68b is disposed on the support 58b. The attachment portion 68b has a plurality of attachment holes

70b on. Through the mounting holes 70b of the mounting frame 20b can be screwed by means of screws and thus secured. However, it is also conceivable to attach the mounting frame 20b in another way, which appears appropriate to a person skilled in the art.

The fastening elements 78b of the mounting frame 20b each have a spring element 80b and in each case a bearing nose 82b. The bearing lugs 82b are arranged in each case by means of the spring elements 80b perpendicular to the insertion direction 54b and parallel to an insertion level resiliently. In this case, each bearing nose 82b is guided by means of the respective spring element 80b along an at least substantially perpendicular to the

Shaft level extending plane movably mounted. During the insertion operation and in an inserted operating state of the induction charging unit 12b in the fixing frame 20b, a groove bottom of the grooves 32b exerts at least a force on the bearing lugs 82b, whereby the bearing lugs 82b partially rebound (FIGS. 6a and 6b). The fixing frame 20b is in contact with the grooves 32b of the induction charging unit 12b through the bearing lugs 82b. The at least one force supports the mounting frame 20b on the induction charging unit 12b. Except for an insertion slope with an angle of 45 ° relative to the insertion direction 54b, the grooves 32b along the insertion direction 54b on a constant groove profile. The bearing lugs 82b of the spring elements 80b of the mounting frame 20b can therefore be pushed into the grooves 32b of the induction charging unit 12b on both sides, that is to say "forwards" and "backwards" relative to the insertion direction 54b shown. The mounting frame 20b and the induction charging unit 12b can be fixed in the inserted operating state by a static friction between the bearing lugs 82b and the grooves 32b. In addition, latching, fixing and / or slinging means not shown in detail, which appear expedient to a person skilled in the art, may be provided in order to secure the fastener. securing frame 20b in the inserted operating state. Overall, viewed along the insertion direction 54b, at least two fastening elements 78b arranged one behind the other. In total, as viewed along the insertion direction 54b, five fastening elements 78b are arranged in succession on two opposite sides of the fastening frame 20b. The spring elements

80b are formed as bar spring elements, on each of which a bearing nose 82b is arranged. The spring elements 80b with the bearing lugs 82b are integrally formed with the mounting frame 20b. The bearing lugs 82b are separated along the spring elements 80b by a slot from the remaining housing of the mounting frame 20b and connected to the ends of the respective spring element 80b with this.

The bearing lugs 82b have sliding surfaces, with which the bearing lugs 82b bear against grooves 32 during the insertion process and in the inserted operating state. In a powerless state of the spring elements 80b, a maximum distance of the sliding surfaces perpendicular to the insertion direction 54b is greater than a maximum distance of the groove base of the two perpendicular to the insertion direction 54b oppositely arranged grooves 32b perpendicular to the insertion direction 54b. Therefore, when the fixing frame 20b is pushed onto the induction charging unit 12b, the spring members 80b partially spring, so that the grooves 32b respectively exert the force on the bearing lugs 82b. The mounting frame 20b is supported by the bearing lugs 82b at the grooves 32b of the induction charging unit 12b. Contaminations and / or tolerances of the grooves 32b or the bearing lugs 82b can be compensated by the bearing lugs 82b coming in and / or rebounding, so that jamming and / or excessive wear of the bearing lugs 82b and / or grooves

32b can be avoided. Due to the forces of the mounting frame 20b is mounted in a mounted state without play on the induction charging unit 12b. The mounting frame 20b is positioned relative to the induction charging unit 12b so as to balance the forces acting on the bearing lugs 82b. Alternatively or additionally, it is also conceivable that the mounting frame

20b at least one groove and the induction charging unit 12b has at least one fastening element with a spring element and a bearing nose.

FIGS. 7a and 7b as well as 8a, 8b and 8c show further conceivable embodiments of the grooves 32c, 32d, 32e, 32f and the fastening elements 78c, 78d, 78e, 78f with spring element 80c, 80d, 80e, 80f and bearing nose 82c, 82d, 82e, 82f. The groove 32c shown in FIGS. 7a and 7b has latching recesses 84c in which the bearing lugs 82c engage in an inserted operating state. In a powerless state of spring elements 80c is a maximum distance from perpendicular to an insertion direction 54c opposite sliding surfaces of the bearing lugs

82c is larger than a direction perpendicular to the insertion direction 54c largest distance of a locking ground of the locking recesses 84c of two mutually perpendicular to the insertion direction 54c oppositely arranged grooves 32c. The grooves 32c thus exert a force on the bearing lugs 82c even in the locked state, so that the fastening frame 20c remains free of play relative to the induction charging unit 12c even in the latched state. The latching recesses 84c are rounded off on both sides in the direction of insertion 54c, so that the latching connection 12c is acted upon by a force against the insertion direction 54c relative to the attachment frame 20c, which is sufficient to urge the bearing lugs 82c out of the latching recesses 84c. Except for insertion slopes with an angle of 45 ° relative to the insertion direction 54c, which facilitate insertion, and the recesses 84c, the grooves 32c along the insertion direction 54c on a constant groove profile. In order to absorb forces perpendicular to a racking level and to position the induction charging unit perpendicular to the racking plane relative to the mounting frame, the groove profiles of the grooves 32c and sliding surface profiles of the bearing lugs 82c are suitably designed. FIGS. 8a, 8b and 8c show three particularly advantageous groove profiles of the groove 32d,

32e, 32f and sliding surface profiles of the bearing lugs 82d, 82e, 82f shown. The groove profile of the groove 32d has a flank 86d parallel to an insertion plane. Another flank 88d forms an angle of 60 ° with the insertion plane (FIG. 8a). The further flank 56a supports the force formed as a spring force with a force component perpendicular to the flank 88d and thus generates a contact force which presses the bearing nose 82d against the flank 86d of the groove 32d. The position of the induction charging unit 12d relative to the fixing frame 20d is thus set particularly precisely with respect to the insertion level. The parallel flanks 86d form the insertion level in this case. FIGS. 8b and 8c show variants with a groove 32e with a circular groove profile and with a groove 32f with a parabolic groove profile as well as adapted sliding surface profiles of the bearing lugs 82e and 82f. The groove profiles face one Shaft insertion level is a floating bearing, which tends to a center position in which the sliding surfaces transversely to the insertion direction 54e, 54f of opposing bearing lugs 82e, 82f in the grooves 32e, 82f have the greatest distance. In the case of the circular groove profile of the groove 32e, the bearing nose 82e has a likewise circular sliding surface profile, resulting in a comparatively robust bearing with a high bearing friction, which can absorb large bearing forces. The parabolic groove profile of the groove 32f is combined with a tapered bearing nose 82f which has a sliding surface profile rounded off with a small radius of less than 10% of a groove height. The bearing nose 82e, 82f, which bears against the groove 32e, 32f with only a small sliding surface, can be smooth in the insertion direction 54e, 54f and can be aligned particularly precisely relative to the insertion plane.

FIGS. 9 to 11 show a schematic representation of a system 90g designed as an inductive charging system with a fastening unit 16g which comprises a system holder 92g made of a plastic material and with an induction charging unit 12g. The system holder 92g defines a receiving portion 26g provided for receiving the induction charging unit 12g and a charging interface 96g of an apparatus 98g to be charged as shown in Figs. 9 and 11 as an induction battery 14g. The induction accumulator 14g is designed as a hand-held power tool accumulator.

The system holder 92g has a fastening means designed as a bracket 100g, which is intended to support the system 90g in a ready-to-use state for hanging about an oscillating axis 102g (FIG. 12). The bracket 100g is movably mounted at two bearing points 104g on the system holder 92g about the pendulum axis 102g and arranged substantially on a side facing away from the receiving portion 26g side of the system holder 92g.

The receiving portion 26g has bearing means 108g, 128g for supporting the induction charging unit 12g and the charging interface 96g of the charging device 98g by an air gap 106g of about 3 mm. For receiving the induction charging unit 12g and the charging interface 96g, they are inserted in a common insertion direction 54g into the receiving region 26g. The charging interface 96g of the device 98g designed as an induction accumulator 14g can be mounted in two positions perpendicular to the pendulum axis 102g and to the insertion direction 54g Axis rotated by 180 ° orientations in the receiving area 26g are inserted.

Figure 13 shows the induction charging unit 12g. The induction charging unit 12g has a surface under which a transmitting coil not shown here to an inductive

Energy transmission is arranged. The surface is formed as a recess 38g. A supply line 130g is used for power supply. On the sides of the induction charging unit 12g, bearing grooves formed by a respective groove 32g are arranged, which are provided for mounting the induction charging unit 12g in the system holder 92g. The system holder 92g has, within the receiving region 26g, two bearing rails 1 10g which support the

Forming storage means 108g. The induction charging unit 12g is inserted with the bearing grooves formed as grooves 32g on the bearing rails 1 10g of the receiving portion 26g in the insertion direction 54g and stored in the receiving area 26g. The receiving region 26g encloses the induction charging unit 12g by more than 180 ° about an axis parallel to the insertion direction 54g, so that the induction charging unit 12g forms a compact unit with the system holder 92g.

Figures 14 and 15 show the charging interface 96g at the induction accumulator 14g. Alternatively, the charging interface 96g can also be arranged geometrically on a handheld power tool 12g with an integrated induction accumulator 14g. The charging interface 96g has a surface below which a receiving coil not shown here is arranged for an inductive energy transfer. The surface is formed as a corresponding to the recess 48 pedestal. On both sides of the surface are two holding elements 56g designed as receiving shoulders 1 14g, which are provided for mounting the charging interface 96g in the system holder 92g. The receiving shoulders 1 14g are arranged symmetrically to an axis perpendicular to the surface and to a center of the receiving coil, so that the charging interface 96g can be inserted into the system holder 92g in two orientations rotated by 180 ° relative to this axis.

The system holder 92g has two flanks 16g which, in a state of the charging interface 96g pushed into the system holder 92g, store the receiving shoulders 14g in a form-fitting manner and form bearing means. The flanks 16g are limited to the insertion direction 54g facing the end of paragraphs 1 18g, which fix the inserted into the receiving area 26g charging interface 96g in a loading position and form securing means (Figure 10). To remove the charging interface 96g men, this is raised in the direction of the induction charging unit 12g on the paragraphs 1 18g and then removed against the insertion direction 54g. A height perpendicular to the insertion direction 54g of the paragraphs 1 18g is less than the dimension of the air gap 106g, so that the receiving shoulders 1 14g of the charging interface 96g can be raised above the shoulders 18g without the induction charging unit

12g to collide. The induction accumulator 14g has on the side facing away from the charging interface 96g on a device interface 120g, with which it can be connected to a hand tool 1 12g. The device interface 120g has a design adapted to the handheld power tool 1 12g and is independent of the configuration of the charging interface 96g. With the system 90g, various induction accumulators 14g designed as portable power tool battery packs with different device interface 120g can be used, in which the charging interface 96g corresponds to the configuration compatible with the system 90g. FIG. 16 shows the system 90g with inserted induction accumulator 14g with a mounting hanging on the bracket 100g. On a solid body, such as a shelf, a hook 122g is mounted, in which the bracket 100g can be hung. The system 90g with the induction accumulator 14g is oriented in accordance with a weight force acting on the center of gravity S of the system 90g with the induction accumulator 14g in such a way that the pendulum axis 102g is approximately moment free.

FIGS. 17 to 21 show the system 90g with a selection of various possible hand-held power tools 1 12g ', 12g ", 12g'", 12g "", 12g "" with different shape, size, mass and center of gravity S. A hand tool

1 12g 'in Figure 17 is designed as a hand router. A hand tool 1 12g "is designed as a drill driver in Figure 18. A hand tool 1 12g '" in Figure 19 is designed as an angle grinder. A hand tool 1 12g "" in Figure 20 is designed as a jigsaw. A hand tool 1 12g ""'in Figure 21 is designed as a hammer drill. The hand tool machines 1 12g align themselves with the system 90g in each case in accordance with their center of gravity S and the weight force about the pendulum axis 102g so that it remains largely torque-free. The system 90g can accommodate so different hand tool machines 1 12g and load and store hanging. FIG. 22 shows an alternative use possibility of the induction charging unit 12g with the induction battery 14g without using the system holder 92g. The induction accumulator 14g can be placed directly on the surface of the induction charging unit 12g with the surface of the charging interface 96g and thus charged directly. For positioning, the induction charging unit 12g has around the surface a circular edge 124g arranged concentrically with the transmitting coil. The surface and the edge 124g form a positioning element 40g. The receiving shoulders 1 14g of the induction accumulator 14g are bounded by circular segments 126g of a circle arranged concentrically with the receiving coil of the induction accumulator 14g, the diameter of the circular segments 126g being matched to the diameter of the edge 124g. The circular segments 126g are used with induction battery 14g placed on the induction charging unit 12g for concentrically positioning the transmitting coil of the induction charging unit 12g with the receiving coil of the induction battery 14g, a tolerance between the circular segments 126g and the edge 124g permitting an extent within which an efficiency of inductive energy transfer is only slightly affected. The charging coil and the receiving coil are symmetrical, so that an orientation around the symmetry axes of the charging coil and the receiving coil has no influence on the charging process. In the same way hand tool machines 1 12g can be loaded directly with the induction charging unit 12g without the use of the system holder 92g, provided that their geometry and center of gravity allow a safe shutdown with their charging interface 96g on the induction charging unit 12g.

Claims

claims

1 . Induction charging device, in particular hand tool induction charging device, having an induction charging unit (12), which is intended to transmit energy in a state coupled to an induction accumulator (14), characterized by a fixing unit (16), which is at least partially provided for the induction charging unit (12). 12) in at least one state with the at least one induction accumulator (14) and / or with at least one external unit (18) to couple.

2. Induction charging device according to claim 1, characterized in that the

Mounting unit (16) is at least partially formed separately from the induction charging unit (12).

3. Induction charging device according to claim 2, characterized in that the fastening unit (16) has at least one fastening frame (20) which at least partially surrounds the induction charging unit (12) in at least one mounted state.

4. induction charging device according to claim 3, characterized in that the at least one fastening frame (20) comprises at least two at least partially interconnected frame members (22.1, 22.2).

5. induction charging device at least according to claim 3, characterized in that the at least one mounting frame (20) forms a receiving area (24) for receiving the induction charging unit (12) and a receiving area (26) for receiving the induction battery (14).

6. Induction charging device according to one of the preceding claims, characterized in that the fastening unit (16) comprises at least one fastening element (28) which is fixedly arranged on a housing (30) of the induction charging unit (12).

7. induction charging device according to claim 6, characterized in that the at least one fastening element (28.1) is at least partially formed as a groove (32).

8. Induction charging device at least according to claims 3 and 7, characterized by at least one holding element (56) which is formed at least partially corresponding to the mounting frame (20).

9. induction charging device at least according to claim 6, characterized in that the at least one fastening element (28.2) is designed as a retaining tab (34).

10. induction charging device according to claim 9, characterized in that the at least one, as a retaining tab (34) formed fastening element (28.2) releasably connected to the housing (30) of the induction charging unit (12) is connected.

1 1. Induction charging device at least according to claim 9, characterized in that the at least one holding element (34) formed as fastening element (28.2) is mounted at least partially resiliently relative to the housing (30) of the induction charging unit (12).

12. System with an induction charging device (10) according to one of the preceding claims and with at least one induction accumulator (14), in particular with a hand tool induction accumulator.

13. Fastening unit of an induction charging device (10) according to one of claims 1 to 1 1. Induction charging unit, in particular hand tool induction charging unit, induction charging device (10) according to one of claims 1 to 11.