Device for receiving a functional unit of a power tool and method for fastening such a receiving device to a power tool

Abstract

The invention relates to a device for receiving a functional unit of a power tool, wherein the receiving device can be fastened to the power tool by a fastening mechanism. A second aspect of the invention relates to a method for fastening such a receiving device to a power tool. In the fastening mechanism, a rotatable insert can be inserted into an opening of the receiving device and can be moved from a non-fastened state to a fastened state by the rotational movement. In the fastened state, a hook of the power tool engages with a protruding portion of the insert.

Description

Technical Field

[0001] The invention relates to a device for receiving a functional unit of a power tool, wherein the receiving device can be fastened to the power tool by a fastening mechanism. A second aspect of the invention relates to a method for fastening such a receiving device to a power tool. In the fastening mechanism, a rotatable insert can be inserted into an opening of the receiving device and can be moved from a non-fastened state to a fastened state by the rotational movement. In the fastened state, a hook of the power tool engages with a protruding portion of the insert. Background Art

[0002] Various methods for fastening functional units, such as line laser devices, to power tools are known in the prior art. For example, it is proposed in the prior art to adhesively bond, screw and / or attach the line laser device to the power tool. However, it has been found that - for example due to warping that can easily occur during the production of the corresponding component - deviations and inaccuracies can occur as a result. Especially in the case of a line laser device, inaccurate representations of the desired projection target can result, which can lead to the power tool not being guided along the optimal straight line. Non-straight guidance can lead to inaccurate working results, which, if necessary, have to be reworked or repeated.

[0003] Furthermore, the projection definition may be lost due to vibrations at the fastening point between the functional unit and the power tool. This may occur in particular if the functional unit is detached from the power unit and is no longer fastened in a stable manner. A further advantage of a permanently mounted functional unit is that such a system comprising a functional unit and a power tool necessarily has a higher overall weight due to the permanent carrying of the functional unit, compared to an easily removable functional unit which can be mounted to the power tool only when required. Summary of the invention

[0004] The object on which the present invention is based is therefore to overcome the above-mentioned disadvantages of the prior art and to provide a fastening solution which can be releasably connected to a power tool. The fastening solution provided should lead to a weight reduction of the system comprising the functional unit and the power tool and should furthermore allow the function of the functional unit to be performed in a particularly precise manner. In the case where the functional unit is a line laser device, the fastening solution provided should allow the emitted laser beam to be projected precisely onto the desired projection target so that the power tool can achieve an optimal, precise working result based on the projected beam.

[0005] The invention provides a device for receiving a functional unit of a power tool, wherein the device can be fastened to the power tool. The device is also preferably referred to as a receiving device and is characterized in that the device comprises a fastening mechanism, wherein the fastening mechanism comprises an opening in the device and a rotatable insert that can be inserted into the opening, wherein the opening is formed by a bore on the side facing away from the power tool, and the device comprises a slot on the side facing the power tool for receiving a hook, wherein the hook is present on the power tool and in the fastened state engages with a protrusion of the insert for fastening the device to the power tool.

[0006] The present invention can provide a device with which a functional unit can be fastened to a power tool in a particularly stable and secure manner. The proposed fastening mechanism ensures unexpected stability of the fastening and ensures effective protection against displacements and undesired sliding of the receiving device and the functional unit located therein. These advantages are achieved in particular due to the fact that in the fastened state the hook of the power tool can engage with the protruding part of the insert. It is preferred within the meaning of the present invention that the fastening can be combined with a dovetail connection, thereby further increasing the stability of the connection. The receiving device preferably includes a cutout for forming the dovetail connection. It has been found that, in particular, the dovetail connection ensures protection of the device against lateral sliding relative to the power tool and effective protection against vibrations.

[0007] The functional unit can be, for example, a line laser device. The line laser device is preferably designed to emit a laser beam, with which, for example, a projection target can be positioned. The power tool can follow the emitted laser beam, which preferably forms a straight line, thereby advantageously generating a working trajectory that also corresponds to a straight line. It is preferred within the meaning of the invention that the receiving device has a cavity in the front region for receiving the functional unit of the power tool. The cavity can in particular constitute a cavity for receiving the line laser device. The cavity for receiving the line laser device is preferably formed in the transition region between two halves of the device that correspond to each other. It is particularly preferred within the meaning of the invention that the device has an opening in the front region, through which the laser light emitted by the line laser device can be conducted. The opening is preferably closed by a preferably disk-shaped material that is transparent to the laser light in order to protect the line laser device from contamination. The line laser device preferably comprises a laser source, with which a laser beam can be generated. In other words, the line laser device is preferably designed to emit a preferably linear thin laser beam, which serves to guide a working process performed by a power tool to which the line laser device can be fastened. In other words, the power tool can be used to follow the laser line drawn by the line laser device, thereby producing a straight slot, for example in the case where the power tool is a slot milling cutter or an angle grinder. The receiving device can also be fastened to a saw, a cutter, a cutting device, a cut-off device or a saw, such as a hand-held circular saw, a reciprocating saw or a ring saw. In particular, it is preferred to use such a power tool in which work is carried out along a substantially straight line and in which guidance by a laser beam is desirable.

[0008] It is preferred within the meaning of the invention that the target can be located by means of a line laser device and that the power tool can follow this location line during operation. In the case, for example, where a slot for placing a power cable to a plug hole or a switch is intended to be produced in a wall, the plug hole or the switch can be located by means of the laser beam of the line laser device. During the operation or the grooving process, a working device of the power tool, such as a cutting disc or a chisel, can then follow the path of the laser beam, thereby producing a particularly straight and smooth slot. Depending on the power tool used, the working device can be, for example, a diamond disc, a cutting disc, a saw blade, a chisel, a drill bit, a saw chain, a saw cable and / or a grinding chain, but is not limited to these.

[0009] In order to generate the laser beam and to follow it with the power tool, the laser source must be fastened to the power tool in a particularly stable and wobble-free manner. In the context of the present invention, this is achieved in particular by providing a fastening mechanism according to the invention and its configuration. By providing a fastened state and a non-fastened state, the fastening mechanism allows the connection between the device and the power tool to be released, so that the receiving device can be assembled or removed in a particularly simple manner according to the needs of the user.

[0010] In the fastening mechanism that can preferably be released in a simple manner, an insert can be inserted into the opening of the receiving device. The receiving device preferably comprises a substrate formed by two parts corresponding to each other. It is preferred within the meaning of the present invention that the first side or first half of the receiving device or the substrate faces away from the power tool, and the second side or second half of the receiving device or the substrate faces the power tool. The two sides of the receiving device are also preferably referred to as halves corresponding to each other. Within the meaning of the present invention, the term "designed to correspond to each other" preferably does not mean that the two device halves must be designed to be consistent or symmetrical with each other. The term preferably indicates that these halves are designed so that they are formed in a transition area relative to each other, so that the two halves can be placed one on top of the other in a particularly simple and uncomplicated manner, thereby obtaining a substantially closed substrate of the receiving device. In particular, preferably the two device halves forming a transition area between these halves match each other, so that, for example, the second half of the substrate can be inserted into the first half of the substrate. Within the meaning of the present invention, the two substrate halves can be connected to each other by a fastening device. For example, writing may be used to obtain a threaded connection between the halves of the receiving device.

[0011] The present invention proposes in particular a particularly stable fastening solution with which a functional unit can be securely fastened to a power tool. In the case of a proposed fastening mechanism combined with an additional dovetail connection, a "double" fastening solution can be advantageously provided for the functional unit. Within the meaning of the present invention, the term "double" preferably means that, in the context of the proposed fastening solution, a dovetail connection is combined with the proposed fastening mechanism, thereby ensuring a particularly stable and vibration-resistant fastening. In a particularly preferred embodiment of the present invention, additional components such as functional units or accessories can be attached to the power tool. The power tool can be, for example, a slot device, with which a slot can be cut into a wall, for example, to place a cable in the slot. The double fastening advantageously ensures that the functional unit is assembled to the power tool at the right angle and in the right position. In addition, the proposed fastening solution ensures that vibrations acting on the functional unit are minimized. This constitutes a substantial advantage of the present disclosure, because in this way, the mechanical load on the optical system and the internal electronic system of the functional unit can be greatly reduced.

[0012] A further advantage of the invention is that the functional unit can be fastened to the power tool in a particularly quick manner and practically without any tools. This makes it possible to assemble the functional unit to the power tool only in the working phases in which, for example, the use of the power tool requires the projection of a laser beam. This allows the power tool to be used without the functional unit at all other times. Therefore, the weight of the power tool can be significantly reduced in those working phases in which the tool is used without the functional unit, compared to those power tools in which the functional unit is permanently mounted or integrated into the power tool. In particular, the invention allows weight-optimized operations to be performed with the power tool. Due to the double-sided fastening method, the invention also allows dimensional changes caused by the resulting tension conditions to be compensated when producing the proposed receiving device. Due to the proposed fastening, in particular, manufacturing-related measurement inaccuracies can be compensated and the laser can therefore be positioned in an extremely precise manner.

[0013] In a preferred exemplary embodiment, the invention comprises a preferably T-shaped carrier or pin which can be arranged in the front area of ​​the power tool or on the end side of the power tool. In an alternative configuration of the invention, a V-shaped pin or a U-shaped pin can also be used. The use of a carrier or a pin on the power tool, which interacts with the cutout on the functional unit, preferably leads to the formation of a dovetail-shaped connection mechanism, which in the context of the invention can interact with the proposed fastening mechanism, thereby achieving a stable fastening of the functional unit with minimized vibration transmission to the functional unit. It is preferred within the meaning of the invention that the pin on the power tool is fastened by the cutout of the functional unit.

[0014] In an exemplary embodiment of the invention, it is preferred that the insert is inserted into the opening of the receiving device when the two halves of the device are not connected to each other. When the consumer purchases the receiving device, the two halves of the receiving device are preferably connected to each other and the insert is located in the receiving device. In other words, it is preferred within the meaning of the invention that the insert is located in the preferably hollow interior of the receiving device, in particular in the opening of the receiving device. The insert preferably has a cylindrical base body so that the insert can be rotated in the hollow cylindrical opening of the receiving device, which is preferably designed at least partially as a bore.

[0015] It is preferred within the meaning of the present invention that the insert comprises a slot through which the insert can be rotated in the opening, wherein the slot is arranged on the side of the insert facing away from the protruding portion. It is preferred within the meaning of the present invention that the slot of the insert is visible in the opening on the side of the receiving device facing away from the power tool. In addition, it is preferred within the meaning of the present invention that the insert can be moved from the fastened state to the non-fastened state, or vice versa, by a rotation process in the opening or bore of the receiving device. The insert preferably has a protruding portion facing the power tool when the insert is located in the receiving device. It is preferred within the meaning of the present invention that the power tool comprises a hook for fastening the receiving device to the power tool. The hook can, for example, be arranged on the side surface or top side of the power tool. Preferably, the fastened state is characterized in that the hook of the power tool engages with the protruding portion of the insert. In the fastened state, the receiving device is preferably connected to the power tool and can move with the power tool. Preferably, the unfastened state is characterized in that the hook of the power tool is not engaged with the protruding portion of the insert. Thus, the proposed fastening mechanism advantageously has no fastening effect between the receiving device and the power tool in the unfastened state, and the receiving device can be removed, disengaged or disconnected from the power tool. In particular, the receiving device can be disengaged by additionally releasing the additional dovetail connection by, for example, lifting or pulling the receiving device upwards from the pin as a counterpart to the dovetail slot.

[0016] It is preferred within the meaning of the invention that the front area of ​​the receiving device has a substantially trapezoidal basic shape when viewed from the side. Within the meaning of the invention, the short trapezoidal top side preferably points forward, while the longer trapezoidal bottom side faces the power tool. The power tool preferably has a substantially planar end side to which the receiving device can be fastened. The power tool preferably has a pin on the front side or end side, wherein the pin is designed to form a dovetail-like connection together with the cutout of the receiving device.

[0017] The proposed receiving device interacts with components of the power tool, in particular with a pin on the end side of the power tool and with the hook required for the proposed fastening mechanism. However, these components of the power tool, in particular the pin and the hook, are not components of the proposed receiving device. However, it is particularly preferred within the meaning of the invention that the shape of the pin corresponds to the shape of the corresponding cutout on the receiving device, or that these shapes match each other. Furthermore, it is preferred within the meaning of the invention that the shape of the hook of the power tool matches the shape of the protruding part of the insert or is designed in a corresponding manner.

[0018] It is preferred within the meaning of the invention that the cutout for forming the dovetail connection is located on the rear side of the front region of the device. It is particularly preferred within the meaning of the invention that the rear side of the front region of the receiving device faces the power tool. Thus, the slot of the receiving device can advantageously interact with the pin of the power tool, so that a particularly effective lateral sliding protection of the receiving device and an effective protection against vibrations can be provided by the invention.

[0019] In another preferred embodiment of the present invention, the cutout for forming a dovetail connection tapers on its route. It is very particularly preferred within the meaning of the present invention that the dovetail cutout on the receiving device tapers from the insertion opening on the bottom side of the front area of ​​the device to one end of the opening. In other words, the cutout for forming a dovetail connection narrows from the insertion opening to its end. The power tool preferably has a corresponding elongated pin corresponding to the tapered shape of the dovetail cutout. In the cross-sectional illustration through the dovetail cutout, the cutout has the shape of the letter "T". It is preferred within the meaning of the present invention that both the lower area and the upper strip area of ​​the preferred T-shaped cutout taper from the bottom to the top or narrow on its route. This advantageously avoids the receiving device from unexpectedly slipping off or detaching from the power tool. In particular, the tapered design of the dovetail connection effectively prevents the receiving device from sliding up or down.

[0020] It is preferred within the meaning of the invention that the receiving device comprises at least one switch for controlling a functional unit of the power tool. The switch can preferably be a switch for switching the functional unit on and off. In the case where the functional unit is formed, for example, by a line laser, the switch can be designed to switch the line laser on and off. The switch can preferably be designed as a push-button switch. However, other switch geometries and operating principles can also be used in the context of the invention. It is particularly preferred within the meaning of the invention that the switch is arranged on the top side of the receiving device, because at this top side the user of the power tool can operate the switch particularly easily. However, it can also be preferred that at least one switch is arranged on the front side, the side surface and / or the rear side of the device, if, for example, a special geometry of the power tool or its handle makes this possible.

[0021] In another preferred improvement of the present invention, the slot for receiving the hook of the power tool has non-parallel boundary edges. The slot is preferably present on the side of the receiving device facing away from the power tool. The expressions "facing away from the power tool" and "facing the power tool" preferably refer to the state in which the receiving device is assembled to the power tool. It is preferred within the meaning of the present invention that the receiving device and the power tool can both exist in an assembled state, that is, in a state in which they are connected to each other, and can also exist separately, that is, separate from each other. It is preferred within the meaning of the present invention that the two boundary edges forming the receiving slot are at a greater distance from each other in the lower opening area than in the upper area of ​​the receiving device. In other words, the slot for receiving the hook preferably present on the receiving device is also tapered in the context of the present invention. The tapering is advantageously used to guide the hook of the power tool into the upper area of ​​the receiving device, wherein the hook can be moved to a tightened state by a rotational movement via a hook that can engage with the raised portion of the insert.

[0022] It is preferred within the meaning of the invention that a portion of the slot on the side facing the power tool is covered by an undercut.The raised portion of the insert can, for example, remain in the undercut region in the tightened state of the receiving device.

[0023] In a further development of the invention, it is preferred that the centering disk segment is arranged in the opening of the device, wherein the centering disk segment has a guide opening. The diameter of the guide opening is preferably smaller than the diameter of the opening of the receiving device. Furthermore, the centering disk segment has a ring segment, wherein the ring segment of the centering disk segment covers approximately 2 / 3 of the full circle.

[0024] It is preferred within the meaning of the invention that the raised part of the insert is designed so that it can move over the free third of the full circle of the centering disk segment. In particular, the movement is a rotational back-and-forth movement or a back-and-forth rotational movement that the insert can perform in the opening of the receiving device. Preferably, the receiving device can be moved from a non-fastened state to a fastened state and vice versa by a rotational movement of the raised part of the insert in the free part of the centering disk segment. A tool such as a flat-blade screwdriver can be used to cause the rotational movement that can move the insert from the fastened state to the non-fastened state. However - depending on availability - it is also possible to use a coin or a fingernail to rotate the insert in the opening of the receiving device and thus fasten the receiving device to the power tool. It is particularly preferred within the meaning of the invention that the centering disk segment is formed of the same material as the device. However, in an alternative embodiment, it is also preferred that the centering disk segment consists of or contains a different material.

[0025] A second aspect of the invention relates to a method for fastening a receiving device of a functional unit to a power tool, wherein the proposed method comprises the following steps:

[0026] a) providing a receiving device in a non-secured state, wherein the non-secured state of the receiving device is defined by the position of the insert in the receiving device,

[0027] b) inserting a pin of the power tool into the cutout of the receiving device,

[0028] c) inserting the hook of the power tool into the slot of the receiving device,

[0029] d) rotating the insert within the receiving device to move the receiving device from a non-secured state to a secured state and obtain a connection between the power tool and the receiving device.

[0030] The terms, definitions and technical advantages introduced for the receiving device apply analogously to the method for fastening the receiving device to a power tool. It is preferred within the meaning of the invention that the receiving device is initially separated from the power tool to which the device is intended to be fastened. The raised portion of the insert is preferably at a stop in the free third of the full circle of the centering disc segment. Due to the rotational movement of the insert, the raised portion can move from a first stop on one side of the free third of the full circle of the centering disc segment to a second stop on the other side of the free third of the full circle of the centering disc segment. Due to the rotational movement, the insert is preferably moved from a non-fastened state to the fastened state.

[0031] In the case where the receiving device is intended to be fastened to the power tool, the receiving device (whose insert is preferably present in a non-fastened state) is initially preferably connected to the power tool by forming a dovetail connection. To this end, an elongated pin preferably arranged on the end side of the power tool is inserted into the receiving device, wherein the cutout is also preferably referred to as the dovetail cutout of the receiving device. In addition, a hook present on the power tool can be inserted into a transverse slot of the receiving device, wherein the slot is present on the side of the receiving device facing the power tool. The slot preferably has transverse boundary edges, which are not formed parallel to each other, but instead proceed toward each other starting from the insertion opening. In other words, the slot, which is a constituent part of the proposed fastening mechanism, tapers on its course.

[0032] It is preferred within the meaning of the invention that the receiving device in the front area of ​​the power tool is pivoted into a T-slot or a pin and then pushed downwards until a secure assembly is achieved. Subsequently, the insert, which is preferably also referred to as a fixing screw within the meaning of the invention, is preferably rotated 90° clockwise until locking in place is sensed. Locking in indicates that the raised portion of the fixing screw has engaged with the fastening profile of the power tool. Thus, a tightened state is assumed. The narrow slot for receiving the fastening profile and the undercut advantageously allows particularly precise centering of the receiving device, wherein, because the narrow slot tapers in a particularly preferred refinement of the invention, the centering becomes increasingly precise as the hook is inserted into the narrow slot. It is preferred within the meaning of the invention that the inner angle describes the taper of the narrow slot as an opening angle.

[0033] Due to the rotation of the insert in the opening of the receiving device, the raised portion of the insert arranged on the side facing the power tool engages with the hook of the power tool. In particular, this rotational movement of the insert takes place in the opening of the receiving device or in the interior of the essentially hollow receiving device. It is preferred within the meaning of the invention that the position of the insert in the opening or bore of the receiving device determines whether the receiving device or the insert is in a non-fastened state or in a fastened state. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Further advantages can be found in the following description of the drawings. The drawings, the description and the claims contain many combined features. A person skilled in the art will also readily consider these features individually and combine them to produce useful further combinations.

[0035] In the accompanying drawings, the same components and components of the same type are marked with the same reference numerals. In the accompanying drawings:

[0036] Figure 1 Figure 2 shows a preferred development of the insert element

[0037] Figure 2 Figure 1 shows a preferred development of a dovetail connection, in particular a pin and a notch

[0038] Figure 3 A diagram showing a preferred arrangement of pins on a power tool

[0039] Figure 4 Illustration showing an exemplary attachment of a receiving device to a power tool

[0040] Figure 5 Figure 1 shows a preferred development of the receiving device

[0041] Figure 6 Illustration showing a preferred development of the receiving device in the assembled state

[0042] Figure 7 Illustration showing a slot of a preferred embodiment of a receiving device

[0043] Figure 8 Illustration showing a preferred improvement of a hook on a power tool

[0044] Fig. 9 Illustration showing a preferred development of a power tool with a pin and a hook

[0045] Fig.10 A diagram showing a preferred arrangement of pins on a power tool DETAILED DESCRIPTION

[0046] Figure 1 A view of a preferred improvement of an insert (6) forming the proposed fastening mechanism together with an opening (5) of a receiving device (1) and a hook (11) of a power tool (3) is shown. In the fastened state, the hook (11) engages with a raised portion (12) of the insert (6), wherein the insert (6) is rotatably mounted in the opening (5) of the receiving device (1) and can be moved from the fastened state to the unfastened state by a rotational movement. The opening (5) on the receiving device (1) is formed by a bore on the side (7) of the receiving device (1) facing away from the power tool (3), while a slot (10) for receiving the hook (11) of the power tool (3) is present on the side (8) of the receiving device (1) facing the power tool (3). The hook (11) on the power tool (3) can also preferably be referred to as a fastening profile. In particular, an L-shaped fastening profile is shown in the drawings. However, other shapes are also conceivable, such as shapes corresponding to the letters T, U, V, K, Z or N. It is preferred within the meaning of the invention that the diameter of the fastening contour ( 11 ) increases from top to bottom.

[0047] Figure 2 A view of a preferred improvement of a preferred dovetail connection, in particular of a pin (22) and of a notch (4), is shown. The pin (22) is preferably present on the power tool (3), for example in a front region which can preferably be oriented in the direction of the working movement of the power tool (3). The power tool (3) can preferably have an end side in its front region, on which the pin (22) can be arranged. The pin (22) can in particular be T-shaped, wherein V, L, K, Z, N or U shapes are also conceivable. The pin (22) and the notch (4) preferably taper in their course. It is particularly preferred within the meaning of the invention that the size of the profile increases from top to bottom, wherein this increase occurs, for example, in an angular range between 0 degrees and approximately 30 degrees.

[0048] exist Figure 2In the upper right region of FIG. 1 , a window is shown, which is preferably a component of the front region (16) of the receiving device (1). A cavity (15) for receiving the functional unit (2) can be formed behind the window. In the case where the functional unit (2) is a line laser device, the laser beam emitted by the line laser device can be guided through the window to the projection target and thus form a guide line for working with the power tool (3).

[0049] Figure 3 A view showing a possible arrangement of the pin (22) on the power tool (3).

[0050] Figure 4 A diagram showing an exemplary attachment of a receiving device (1) to a power tool (3) is shown. Figure 4 As shown in FIG. 1 , an arcuate handle may span the body of the power tool ( 3 ) and the receiving device ( 1 ) may be attached underneath the arcuate handle. Figure 4 The receiving device (1) is shown during assembly to a power tool (3). In this case, a pin (22) of the power tool (3) is inserted into a cutout (4) on the receiving device (1), wherein such insertion is possible only in one direction due to the preferred tapering of the cutout (4) and the pin (22). Figure 4 In particular, a front view of a power tool (3) with operator control elements is shown. In particular, Figure 4 The end face of the power tool ( 3 ) is shown, on which a pin ( 22 ) can be arranged for forming a dovetail-like connection. Figure 4 Also shown is a front region (16) of the receiving device (1) having a trapezoidal basic shape in a side view of the receiving device (not shown). The front region (16) of the receiving device (1) preferably comprises a cavity (15) in which the functional unit (2) can be accommodated. In the assembled state, the receiving device (1) preferably abuts against the power tool (3) with the side (8) facing the power tool (3), while the side (7) of the receiving device (1) facing away from the power tool (3) is away from or away from the power tool (3).

[0051] Figure 5 A diagrammatic representation of a preferred development of the receiving device (1) is shown. Figure 5 In the embodiment, the receiving device (1) has not yet been completely assembled on the power tool (3). In particular, Figure 5 The position of the receiving device (1) relative to the handle of the power tool (3) is shown. The receiving device (1) can include a switch (17) for controlling the functional unit (2). The functional unit (2) can be switched on or off by means of the switch (17). The switch (17) is preferably present in the rear region of the receiving device (1). The rear region of the receiving device (1) is preferably facing away from the working direction of the power tool (3).

[0052] Figure 6 A further illustration of a preferred development of the receiving device (1) in a mounted state on a power tool (3) is shown, wherein: Figure 6 A side view of a mating receiving device (1) is specifically shown. In particular, Figure 6 The side (7) of the receiving device (1) facing away from the power tool (3) is shown, in which the opening (5) is formed. On the side (7) of the receiving device (1) facing away from the power tool (3), the opening (5) is preferably designed as a bore, preferably with a substantially circular bottom surface. An insert (6) which can be moved from a tightened state to a loose state by rotation is preferably present in the bore or opening (5). The rotational movement of the insert (6) can preferably be transmitted to the insert (6) using a slot (13) of the insert (6). For example, a coin or other tool that is usually readily available on a construction site can be used for this purpose.

[0053] Figure 7 A diagram of a slot (10) of a preferred embodiment of a receiving device (1) is shown. The slot (10) preferably comprises two side or boundary edges which preferably do not run parallel to each other. The slot (10) further comprises an undercut (18) which covers a portion of the slot (10). In particular, the undercut (18) at least partially covers an inner area of ​​the receiving device (1) comprising a centering disk segment (not shown). The centering disk segment is preferably arranged in an opening (5) of the device (1), wherein the centering disk segment has a guide opening (20) in its center. The centering disk segment preferably has a ring segment, wherein the ring segment of the centering disk segment covers approximately 2 / 3 of the full circle. It is preferred within the meaning of the invention that the centering disk segment comprises a guide opening (20) in its center, around which the ring segment extends in an angular range of 200 to 280 degrees, preferably 220 to 260 degrees, particularly preferably in an angular range between 230 and 250 degrees, and most preferably at approximately 240 degrees. The remaining area of ​​the inner cavity of the centering disk segment preferably remains free, wherein this free part of the centering disk segment preferably occupies an angular range of 80 to 160 degrees, preferably 100 to 140 degrees, particularly preferably 110 to 130 degrees, and most preferably 120 degrees. In other words, the free part of the centering disk segment preferably occupies approximately 1 / 3 of the full circle, wherein the raised part (12) of the insert (6) is designed such that the raised part (12) is movable in the free third of the full circle of the centering disk segment.

[0054] Figure 7 It is also shown that the base body (14) of the receiving device (1) is formed from two halves (14a, 14b), wherein the first half (14a) faces the power tool (3) in the assembled state, and the second half (14b) faces away from the power tool (3) in the assembled state of the receiving device (1).

[0055] Figure 8 A diagrammatic representation of a preferred development of a hook ( 11 ) on a power tool ( 3 ) is shown.

[0056] Fig. 9 The diagram shows a preferred development of a power tool (3) having a pin (22) and a hook (11).

[0057] Fig.10 A view showing a preferred arrangement of the pin (22) on the power tool (3).

[0058] List of Reference Numerals

[0059] 1Receiving equipment

[0060] 2 Functional Unit

[0061] 3. Power Tools

[0062] 4 Notches for forming dovetail connections / dovetail notches

[0063] 5 Opening

[0064] 6 Inserts

[0065] 7 The side of the receiving device facing away from the power tool

[0066] 8 The side of the receiving device facing the power tool

[0067] 10 Slot for receiving hook of power tool

[0068] 11 hooks

[0069] 12 Raised portion of insert

[0070] 13 Slot for insert

[0071] 14. Base of receiving device

[0072] 14a, 14b lateral halves of the base body of the receiving device

[0073] 15 Cavity for receiving the functional unit

[0074] 16Front area of ​​the device

[0075] 17 Switches for controlling functional units

[0076] 18 Undercut

[0077] 20 Guide opening

[0078] 22 Pins for forming dovetail connections on power tools

Claims

1. A device for receiving a functional unit (2) of a power tool (3), wherein: The device can be fastened to the power tool (3), It is characterized in that The device comprises a fastening mechanism, wherein the fastening mechanism comprises an opening (5) in the device and a rotatable insert (6) which can be inserted into the opening (5), wherein the opening (5) is formed by a bore on a side (7) facing away from the power tool (3), and the device comprises a first slot (10) on a side (8) facing the power tool (3) for receiving a hook (11), wherein the hook (11) is present on the power tool (3) and in a fastened state engages with a protruding portion (12) of the insert (6) for fastening the device to the power tool (3), the first slot (10) for receiving the hook (11) of the power tool (3) having non-parallel boundary edges.

2. The device as claimed in claim 1, It is characterized in that The insert (6) can be moved from the fastened state to the unfastened state by a rotation process.

3. The device according to claim 1 or 2, It is characterized in that The insert (6) comprises a second slot (13) for rotating the insert (6) in the opening (5) of the device, wherein the second slot (13) is arranged on a side of the insert (6) facing away from the raised portion (12).

4. The device according to claim 1 or 2, It is characterized in that The insert (6) has a cylindrical base body.

5. The device according to claim 1 or 2, It is characterized in that The device comprises a base body (14) formed of two parts (14a, 14b) corresponding to each other.

6. The device according to claim 1 or 2, It is characterized in that The device has a cavity (15) in a front region (16) for receiving a functional unit (2) of the power tool (3).

7. The device as claimed in claim 6, It is characterized in that The front region (16) of the device has a trapezoidal basic shape.

8. The device as claimed in claim 7, It is characterized in that The device comprises a cutout (4) for forming a dovetail connection.

9. The device as claimed in claim 8, It is characterized in that The cutout (4) for forming a dovetail-like connection is present on the rear side of the front region (16) of the device.

10. The device according to claim 8 or 9, It is characterized in that This cutout (4) for forming a dovetail connection tapers along its course.

11. The device according to claim 1 or 2, It is characterized in that A portion of the first slot (10) on the side (8) facing the power tool (3) is covered by an undercut (18).

12. The device according to claim 1 or 2, It is characterized in that The centering disk segment is arranged in an opening (5) of the device, wherein the centering disk segment has a guide opening (20), wherein the ring segment of the centering disk segment covers approximately 2 / 3 of the full circle.

13. The device as claimed in claim 12, It is characterized in that The raised portion (12) of the insert (6) is designed such that the raised portion (12) can be moved into the free 1 / 3 of the full circle of the centering disk segment.

14. A method for fastening a receiving device (1) of a functional unit (2) to a power tool (3), wherein: The proposed method includes the following steps: a) providing a receiving device (1) in a non-secured state, wherein the non-secured state of the receiving device (1) is defined by the position of an insert (6) in the receiving device (1), b) inserting the pin (22) of the power tool (3) into the cutout (4) of the receiving device (1), c) inserting the hook (11) of the power tool (3) into the first slot (10) of the receiving device (1), the first slot (10) for receiving the hook (11) of the power tool (3) having non-parallel boundary edges, d) rotating the insert (6) in the receiving device (1) so that the receiving device (1) moves from a non-fastened state to a fastened state and obtains a connection between the power tool (3) and the receiving device (1).

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