hand-held tool

Abstract

The invention relates to a handheld power tool, wherein a battery compartment (10) comprises a base body (11) and a contact unit (14) for electrically connecting at least one battery pack (7), wherein the base body (11) has a mounting opening (12) through which the contact unit (14) is inserted into the base body (11) in an insertion direction (21) for fastening the contact unit (14) to the base body (11), wherein the section of the contact unit (14) that is arranged inside the base body (11) is an inner section (23) of the contact unit (14), wherein the inner section (23) has an outer contour (15), and wherein the mounting opening (12) is adapted to the outer contour (15) of the contact unit (14), in particular to a projection of the outer contour (15) in the insertion direction (21) onto a projection plane (20) oriented perpendicular to the insertion direction (21), and is rectangular in shape contour has different opening contours (13).

Description

The invention relates to a hand-held work device according to the features of the preamble of claim 1. A handheld power tool, in particular an angle grinder, is known, comprising a housing and an electric drive motor arranged within the housing. The drive motor serves to drive a tool, in particular a cutting disc. The known power tool includes a battery compartment for receiving a battery pack to supply the electric drive motor with electrical energy. The battery compartment comprises a base body and a contact unit for connecting the battery pack. During assembly of the power tool, the contact unit is inserted into the base body through a mounting opening and attached to it. A disadvantage of the known device is that, when assembled, foreign objects can enter the housing through the mounting opening in the battery compartment. Such foreign objects can lead to contamination of the housing interior and malfunctions of the device. It is therefore an object of the invention to provide a hand-held work device that has a low susceptibility to contamination of the housing interior and at the same time enables low-maintenance operation of the work device. This problem is solved by a generic, hand-held tool according to the features of claim 1. The hand-held work device according to the invention comprises a housing, an electric drive motor arranged in the housing, at least one battery compartment arranged on the housing for receiving at least one battery pack for supplying the electric drive motor with electrical energy, wherein the battery compartment comprises a base body and a contact unit for electrical connection of the at least one battery pack, wherein the base body has a mounting opening through which the contact unit is inserted into the base body in an insertion direction for fastening the contact unit to the base body, wherein the section of the contact unit that is arranged inside the base body is an inner section of the contact unit, wherein the inner section has an outer contour.The mounting opening has an opening contour adapted to the outer contour of the contact unit, in particular adapted to a projection of the outer contour in the insertion direction onto a projection plane oriented perpendicular to the insertion direction, and differing from a rectangular contour. Once the contact unit is inserted into the battery compartment's base body via the mounting opening, a remaining opening cross-section remains through which contaminants can enter the housing. By adapting the mounting opening to the outer contour of the contact unit, this remaining opening cross-section is reduced compared to the remaining opening cross-section of the previously known device. The smaller the remaining opening cross-section, the smaller the contaminants that can penetrate the housing through it. Reducing the remaining opening cross-section also decreases the ingress of small contaminants into the housing. This, in turn, reduces the susceptibility of the device's housing to contamination.This prevents malfunctions caused by interfering objects, thus enabling low-maintenance operation of the work equipment. The term "projection" is to be understood here as a projection of the contour of an object or a section of an object onto a projection plane, wherein the projection plane is oriented perpendicular to the insertion direction of the contact unit into the base body of the battery compartment. It is specifically provided that the opening contour of the mounting opening has a width and a height measured perpendicular to the insertion direction, wherein the distance between the outer contour of the contact unit and the opening contour of the mounting opening, projected onto the projection plane, is less than 6 mm, particularly less than 5 mm, and most especially less than 4 mm, over at least 60%, preferably at least 80% of the width and / or height of the opening contour of the mounting opening. The opening contour of the mounting opening must be designed such that the contact unit can be inserted through the opening contour of the mounting opening into the base body of the battery compartment. Manufacturing tolerances of individual components and their assembly must also be taken into account.Secondly, the opening contour of the mounting hole should be selected such that the distance between the opening contour and the contact unit is as small as possible when the contact unit is pushed through the mounting hole. This allows the opening size of the mounting hole to be made smaller, thus reducing the susceptibility of the housing interior to dirt and debris. In particular, the opening contour of the mounting hole follows the outer contour of the contact unit. This reduces the distance between the opening contour of the mounting hole and the contact unit. The opening contour of the mounting hole is precisely shaped to match the outer contour of the contact unit. The term "precisely shaped" means that the opening contour of the mounting hole is formed in such a way that the contact unit can be pushed through the opening contour without making contact with it, and the distance between the opening contour and the contact unit is minimal. Manufacturing tolerances of individual components must also be taken into account. It is specifically intended that the opening contour of the mounting opening is designed such that, in a mounted state of the working device, it is not possible for a spherical body with a diameter greater than 8 mm, particularly greater than 6 mm, and most especially greater than 3 mm, to penetrate the mounting opening. In other words, the mounting opening is chosen to be sufficiently small so that no interfering objects of a corresponding size can penetrate it. It is specifically provided that the contact unit has at least one contact element and / or at least one guide element, wherein the opening contour of the mounting opening has at least one opening section adapted to the contour of the at least one contact element and / or the at least one guide element for sliding the contact element and / or the guide element through. The contact unit comprises, in particular, a contact plate on which at least one contact element and / or at least one guide element are arranged. The contact element and / or the guide element extend, in particular, away from the contact plate and have, in particular, a free end facing away from the contact plate. Such an end is provided for guiding and / or contacting the at least one battery pack. Due to this design of the contact unit, the projection of the outer contour of the contact unit, in particular of the inner section of the contact unit, deviates, in particular, from a simple geometry, such as a rectangular geometry. The projection of the contact element and / or the guide element, starting from the contour of the contact plate, is, in particular, rib-like.The at least one adapted opening section of the opening contour is specifically adapted to this web-like contour of the projection of the contact element and / or the guide element. Preferably, the contour of the opening section follows the rib-like contour of the projection of the contact element and / or the guide element. Thus, the remaining opening cross-section can be reduced by forming at least one adapted opening section of the opening contour. It is specifically stipulated that the number of adapted opening sections must be at least equal to the number of contact elements and / or the number of guide elements. In particular, the number of adapted opening sections must be exactly equal to the sum of the number of contact elements and the number of guide elements. It is specifically stipulated that the distance between the opening contour in the area of ​​the adapted opening sections and a contact element or guide element when the contact unit is inserted into the base body is no greater than 2.0 mm, in particular no greater than 1.5 mm, and most especially no greater than 1.0 mm. A small cross-sectional area of ​​the mounting opening is thus ensured even in the area of ​​the opening sections. The mounting opening extends to the bottom of the base body. The contact unit is specifically located at the bottom of the battery compartment's base body. It is specifically provided that the working device includes at least one additional battery compartment arranged on the housing for receiving at least one additional battery pack to supply the electric drive motor with electrical energy, wherein the battery compartment comprises an additional base body and an additional contact unit for the electrical connection of the at least one additional battery pack, wherein the additional base body has an additional mounting opening through which the additional contact unit is inserted into the additional base body in a further insertion direction for fastening the additional contact unit to the additional base body, wherein the insertion direction of the contact unit into the mounting opening corresponds to the insertion direction of the additional contact unit into the additional mounting opening. The battery compartment and the additional battery compartment are, in particular, identical in design. An embodiment of the invention is explained below with reference to the drawings. The figures show: Fig. 1 in a perspective view of an embodiment of the hand-held tool according to the invention, Fig. 2 in a side view of the hand-held tool according to Fig. 1, Fig. 3 in a sectional view of the hand-held tool according to Fig. 1 without the contact unit, Fig. 4 in a sectional view of the hand-held tool according to Fig. 1 with the contact unit attached in the base bodies of the battery compartments, Fig. 5 in a top view of the hand-held tool according to Fig. 1, Fig. 6 in a perspective view of the base body of the battery compartment and the further base body of the further battery compartment of the hand-held tool according to Fig. 1, Fig. 7 in a perspective view of the contact unit and the further contact unit of the hand-held tool according to Fig. 1.8 in a side view of the battery compartment with base body and contact unit of the hand-held tool according to Fig. 1 and Fig. 9 in a partial, enlarged side view of the battery compartment with base body and contact unit of the hand-held tool according to Fig. 1 . Fig. 1 shows an embodiment of the hand-held tool 1 as a cut-off saw. The tool 1 can alternatively also be designed as a chainsaw, angle grinder, or other tool. The tool 1 is hand-held, in particular hand-carried. During operation, the tool 1 is carried and guided by the operator. The tool 1 has a housing 2. Furthermore, the tool 1 includes a drive motor 3, which is arranged in the housing 2. In Fig. 1, the drive motor 3 is represented schematically by a dashed rectangle. The drive motor 3 is an electric motor. The drive motor 3 serves to drive a tool 5 that can be attached to the tool 1. In the present embodiment, the tool 5 is designed as a cutting disc. As shown in Fig. 1, the working device 1 comprises at least one battery pack 7 for supplying electrical power to the drive motor 3. Particularly preferably, the working device 1 comprises a further battery pack 7' for supplying power to the drive motor 3. At least one battery compartment 10 is provided for receiving the at least one battery pack 7 and / or the further battery pack 7'. Furthermore, the working device 1 particularly comprises a further battery compartment 10' for receiving the at least one battery pack 7 and / or the further battery pack 7'. The battery compartment 10 and / or the further battery compartment 10' are particularly arranged on the housing 2. The battery compartment 10 and / or the further battery compartment 10' are particularly designed as a separate component from the housing 2. The battery compartment 10 and / or the further battery compartment 10' are particularly fixed to the housing 2.In an alternative embodiment, it may also be provided that the battery compartment 10 and / or the further battery compartment 10' are formed as a single unit with the housing 2, in particular that the battery compartment 10 and / or the further battery compartment 10' are an integral part of the housing 2. The at least one battery pack 7 and / or the additional battery pack 7' can be removed from the battery compartment 10 and / or the additional battery compartment 10' without tools. The at least one battery pack 7 and / or the additional battery pack 7' are inserted into the battery compartment 10 and / or the additional battery compartment 10' and locked into place for attachment to the work device 1. The locking mechanism can be released without tools, and the at least one battery pack 7 and / or the additional battery pack 7' can be removed from the battery compartment 10 and / or the additional battery compartment 10', for example, for charging or replacement. Alternatively, the at least one battery pack 7 and / or the additional battery pack 7' can be designed as sled-type battery packs. As shown in Figures 1 and 2, the working device 1 comprises a rear handle 53. Furthermore, the working device 1 comprises a front handle 54. The front handle 54 is preferably designed as a handle tube. Other designs of the front handle 54 may also be advantageous. The housing 2 extends from a rear end 35 to a front end 36. In this case, the rear handle 53 forms the rear end 35 of the housing 2. In an alternative embodiment, the rear handle 53 may also be designed separately from the housing 2. In such an embodiment, the rear handle 53 is arranged in the region of the rear end 35 of the housing 2. The front handle 54 is arranged in the region of the front end 36 of the housing 2. Furthermore, the working device 1 has a control element 6, which is provided for controlling the drive motor 3. The control element 6 is designed as an operating lever. The control element 6 is associated with the rear handle 53. The working device 1 also includes a locking element 9, which locks the control element 6 in a locked position and releases the control element 6 for operation in a release position. The locking element 9 is preferably designed as a locking lever. The locking and release functions of the locking element 9 can be implemented mechanically and / or electronically, for example, by sensors. The locking element 9 is associated with the rear handle 53. This means that the operator can actuate both the control element 6 and the locking element 9 when gripping the rear handle 53. In a preferred embodiment, the control element 6 and the locking element 9 are arranged on the rear handle 53. Particularly preferably, the working device 1 comprises a control unit (not shown in detail). The control unit processes signals generated by the operating element 6 and / or the locking element 9 and serves essentially to control the drive motor 3. Other functions of the working device 1 can also be implemented via the control unit. As shown in Fig. 2, the working device 1 comprises a boom 30. The boom 30 extends along its longitudinal central axis 34 from a proximal end 32 to a distal end 33. The boom 30 is fixed, at least indirectly, to the housing 2. In particular, the boom 30 is fixed indirectly to the housing 2 in the region of the front end 36 of the housing 2. The boom 30 projects beyond the front end 36 of the housing 2 and extends with its distal end 33 away from the front end 36 of the housing 2. The tool 5 can be arranged at the distal end 33 of the boom 30. The tool 5 is rotatably mounted at the distal end 33 of the boom 30. During operation of the working device 1, the tool 5 is driven by the drive motor 3 to rotate in a direction 52. The working device 1 comprises a pulley (not shown) driven by the drive motor 3. The working device 1 also comprises another pulley (not shown) located at the distal end 33 of the boom 30 and rigidly connected to the tool 5 in the direction of rotation 52 of the tool 5. Both the tool 5 and the other pulley are, of course, removable, allowing them to be replaced individually. The pulley, preferably located near the proximal end 32 of the boom 30 on the housing 2, is operatively connected to the other pulley via a belt. The belt serves to transmit speed and torque between the drive motor 3 and the tool 5. Other means of transmitting speed and torque between the drive motor 3 and the tool 5 are also conceivable, e.g., a gear drive. As shown in Figs. 1 and 2, the working device 1 includes a protective hood 51. The protective hood 51 is attached to the boom 30, in particular to the distal end 33 of the boom 30. The protective hood 51 covers the tool 5 over part of its circumference. As shown in Fig. 2, the working device 1 comprises a top 44 and a bottom 45, wherein the working device 1 can be placed on a base 40 on its bottom 45. The top 44 and the bottom 45 are connected to each other by a first longitudinal outer side 46 and a second longitudinal outer side 47 (Fig. 3). Terms that describe sides or other components of the working device 1 using spatial terms, for example, "top" and "bottom," generally refer to the usual storage position of the working device 1 shown in Fig. 2. The usual storage position of the working device 1 is a position in which the working device 1 is placed on a flat, horizontal surface. Feet 57, 57' serve to support the working device 1. As shown in Figures 3 and 4, the handheld tool 1 includes at least one battery compartment 10 for receiving at least one battery pack 7. The at least one battery pack 7 serves to supply the electric drive motor 3 with electrical energy. Furthermore, the handheld tool 1 includes, in particular, a further battery compartment 10' for receiving another battery pack 7'. The further battery pack 7' also serves to supply the electric drive motor 3 with electrical energy. As shown in Figures 3 and 4, the at least one battery compartment 10 comprises a base body 11 and a contact unit 14 (Figure 4). The contact unit 14 serves to connect the at least one battery pack 7. The base body 11 has, in particular, a compartment opening 25, wherein the at least one battery pack 7 can be inserted into the base body 11 of the at least one battery compartment 10 via the compartment opening 25. The compartment opening 25 of the at least one battery compartment 10 is, in particular, arranged on the upper surface 44 of the housing 2. The at least one battery compartment 10 is, in particular, open towards the upper surface 44 of the housing 2. Furthermore, the base body 11 of the battery compartment 10 has a compartment base 24. The battery pack 7, inserted into the at least one battery compartment 10, comes to rest against the compartment base 24. In particular, an ejection spring 61 is arranged on the shaft bottom 24.To secure the at least one battery pack 7, the at least one battery pack 7 must be pressed against the bottom of the compartment 24 against the preload force of the ejector spring 61 until the at least one battery pack 7 locks into place in the battery compartment 10 with a battery locking lever. To remove the battery pack 7 from the battery compartment 10, the locking mechanism must be released, causing the ejector spring 61 to push the battery pack 10 at least partially out of the battery compartment 10, allowing the operator to easily remove the battery pack 7 from the battery compartment 10. The at least one battery shaft 10 extends from its shaft opening 25 to its shaft bottom 24. The shaft opening 25 and the shaft bottom 24 are connected to each other, in particular via several side walls 62, especially four side walls 62. In the present embodiment, adjacent side walls of the four side walls 62 are arranged essentially rectangularly relative to each other. In the present embodiment, the side walls 62 are arranged relative to each other such that they form a rectangular shaft cross-section. Naturally, the design and arrangement of the side walls 62 of the battery compartment 10 depend on the shape of the battery pack 7. Differently shaped compartment cross-sections may also be suitable. As shown in Figures 3 and 4, the base body 11 of the battery compartment 10 is enclosed by the housing 2 at the top 44 of the housing 2. The housing 2 forms, in particular, a part, especially an upper part, of the battery compartment 10. As shown in Fig. 4, the contact unit 14 of the battery compartment 10 is arranged, in particular, on the compartment base 24 of the base body 11. The contact unit 14 is a component formed separately from the base body 11 of the battery compartment 10. When the battery pack 7 is attached to the battery compartment 10, the battery pack 7 is plugged onto the contact unit 14. The battery pack 7 can then supply the working tool 1 with electrical energy. Figure 3 shows the working device 1 with the battery compartment 10 and the base body 11; the contact unit 14 is not yet mounted. A mounting opening 12 is provided on the base body 11 for attaching the contact unit 14. This mounting opening 12 is formed, in particular, on a side wall 62 of the battery compartment 10. Furthermore, the mounting opening 12 extends, in particular, into the bottom 24 of the base body 11. To attach the contact unit 14, it is inserted into the base body 11 through the mounting opening 12 along an insertion direction 21. Figure 4 shows the contact unit 14 in a state inserted into the base body 11. As shown in Figures 3 and 4, the working device 1 includes, in particular, the additional battery compartment 10'. The additional battery compartment 10' is constructed analogously to the battery compartment 10. Thus, the additional battery compartment 10' comprises a further base body 11' with a further mounting opening 12' and a further contact unit 14', which is attached in the base body 11'. In the preferred embodiment, the base body 11 of the at least one battery compartment 10 and the additional base body 11' of the additional battery compartment 10' are formed in one piece, in particular as an integral component, in particular as a casting, in particular as an injection-molded part. In an alternative embodiment, it may also be advantageous to form the base body 11 of the at least one battery compartment 10 and the additional base body 11' of the additional battery compartment 10' from separately formed components. As shown in Figures 3 and 6, a mounting rail 63 is provided for attaching the contact unit 14 to the base body 11 at the mounting opening 12, in particular along the edge of the mounting opening 12. A receiving element 64 is provided on the contact unit 14, which is slid onto the mounting rail 63 in the insertion direction 21. The receiving element 64 includes a groove 65 into which the mounting rail 63 of the base body 11 engages when the contact unit 14 is inserted into the base body 11 (Figures 4 and 7). The receiving element 64 and the mounting rail 63 of the base body 11 are arranged and designed such that the receiving element 64 is clamped to the mounting rail 63 located in the groove 65 of the receiving element 64. No further fastening means are required to attach the contact unit 14 to the base body 11 of the battery compartment 10. Figure 7 shows the contact unit 14 and the further contact unit 14'. Electrical lines 66, 66' are connected to the contact unit 14 and / or the further contact unit 14', which serve to transmit electrical energy to the drive motor 3. Furthermore, electrical signal lines 67, 67' are connected to the contact unit 14 and / or the further contact unit 14', which serve to electrically connect the control unit. The contact unit 14 comprises at least one contact element 17 and / or at least one guide element 18. The at least one contact element 17 is provided for the electrical connection of the at least one battery pack 7. The at least one contact element 17 is preferably designed as a contact tongue, particularly a planar one. The contact unit 14 comprises, in particular, a contact plate 16. The contact plate 16 comprises a top surface 70 and a bottom surface 71. The top surface 70 of the contact plate 16 faces the battery pack 7 when it is mounted in the battery compartment. The bottom surface 71 of the contact plate 16 faces away from the battery pack 7 when it is mounted in the battery compartment. The at least one contact element 17 is arranged on the contact plate 16. The contact element 17 has a first end 68 and a second, free end 69. The first end 68 is arranged on the contact plate 16.The first end 68 is located, in particular, on the underside 71 of the contact plate 16, with the contact element 17 extending from the underside 71 of the contact plate 16 through a slot in the contact plate 16 away from the top 70 of the contact plate. The second, free end 69 of the contact element 17 is spaced apart from the contact plate 16. The contact element 17 extends along a vertical direction from its first end 68 to its second end 69, the vertical direction of the contact element 17 being oriented, in particular, perpendicular to the top 70 of the contact plate 16. As shown in Fig. 7, the contact unit 14 comprises, in particular, several contact elements 17, especially three contact elements 17. A different number of contact elements 17 may also be advantageous. The multiple contact elements 17 are, in particular, of identical construction. The contact unit 14 comprises at least one guide element 18. The at least one guide element 18 serves to guide and / or pre-center the battery pack 7 when the battery pack 7 is attached to the contact unit 14. The forces acting when the battery pack is attached to the contact unit 14 are to be absorbed by the at least one guide element 18. This is intended to prevent any stress on the at least one contact element 17. The guide element 18 preferably extends in its vertical direction parallel to the at least one contact element 17. The at least one guide element 18 is preferably integrally formed with the contact plate 16. The at least one guide element 18 is, in particular, attached at a first end to the contact plate 16, especially to the top surface 70 of the contact plate 16. A second, free end of the guide element 18 extends away from the top surface 70 of the contact plate 16.The guide element 18 is designed, in particular, as a planar fitting tongue. The contact unit 14 comprises, in particular, several guide elements 18. In the present embodiment of the contact unit 14, two guide elements 18 are provided. A different number of guide elements 18 for a contact unit 14 may also be advantageous. As shown in Fig. 7, the further contact unit 14' is constructed analogously, and in particular identically, to the at least one contact unit 14. To attach the contact unit 14 to the base body 11, the contact unit 14 is pushed through the mounting opening 12 in the insertion direction 22. As shown in Figs. 4 and 5, the contact unit 14, in its attached state, has at least one section that is arranged within the base body 11. This section is designated as the inner section 23 of the contact unit 14. The inner section 23 is enclosed by a dashed line in Fig. 5. It can also be provided, in particular, that the entire contact unit 14, in its attached state, is located completely within the base body 11. In the present embodiment of the working device 1, however, it is provided that the contact unit 14, in its attached state, is located only partially within the base body 11.The section of the contact unit 14 that lies outside the base body 11 when the contact unit 14 is mounted is designated as the outer section 26. The inner section 23 of the contact unit 14 includes, for example, the at least one contact element 17, the at least one guide element 18, and, in part, the contact plate 16. The outer section 26 includes, in particular, a cover plate 22. The cover plate 22 is formed, in particular, transversely, and especially vertically, with respect to the insertion direction 21. The cover plate 22 serves, in particular, to at least partially cover the mounting opening 12 of the base body 11 when the contact unit 14 is mounted. As shown in Fig. 7, the cover plate 22 is part of the contact plate 16. The cover plate 22 extends downwards, i.e., away from the at least one contact element 17 and / or the at least one guide element 18.In an alternative embodiment, the cover plate 22 can also extend both upwards and downwards from the top 70 and bottom 71 of the contact plate 16. The cover plate 22 can then be designed such that it completely covers the mounting opening 12. As shown in Figures 4 and 7, the inner section 23 of the contact unit comprises an outer contour 15. As shown in Figures 3 and 6, the mounting opening 12 is adapted to the outer contour 15 of the inner section 23. The mounting opening 12 has an opening contour 13, in particular an opening contour 13 related to the insertion direction 21. In other words, the opening contour 13 is in particular a projection of the contour of the mounting opening 12 in the insertion direction 21 onto a projection plane 20 that is oriented perpendicular to the insertion direction 21. The opening contour 13 is adapted to the outer contour 15 of the inner section 23 of the contact unit 14, as shown in Figures 6 and 8. The opening contour 13 is specifically adapted to a projection of the outer contour 15 of the inner section 23 of the contact unit 14 in the insertion direction 21 onto the projection plane 20 (Fig. 9). As shown in Fig.As shown in Figure 8, the opening contour 13 of the mounting opening 12 has an opening contour 13 that differs from a rectangular contour. By adapting the opening contour 13 to the irregular outer contour 15 of the inner section 23 of the contact unit 14, the remaining open opening cross-section 27 of the mounting opening 12 when the contact unit 14 is in a fixed state is to be reduced. In an alternative embodiment of the mounting opening 12, the opening contour 13 can, for example, be curved along its upper contour edge, such that the remaining opening cross-section 27 is reduced compared to a rectangular opening contour. Opening contours with other shapes may also be suitable. As shown particularly in Fig. 9, the opening contour 13 is designed such that it follows the outer contour 15 of the inner section 23 of the contact unit 14. In particular, when viewed in the insertion direction 21, the opening contour 13 follows the projection of the outer contour 15 of the inner section 23 onto the projection plane 21. In the insertion direction 21, the opening contour 13 encompasses, in particular, the at least one contact element 17 and / or the at least one guide element 18. Preferably, the opening contour 13 of the mounting opening 12 is designed to fit precisely with the outer contour 15 of the inner section 23 of the contact unit 14.Thus, the opening contour 13 is designed such that the distance between the contact unit 14 and the opening contour 13 is minimal when the contact unit 14 is inserted, and at the same time the distance is sufficiently large, taking into account the manufacturing tolerances of the individual components, to allow the contact unit 14 to be pushed into the base body 11 without frictional forces between the at least one contact element 17 and / or the at least one guide element 18 and the opening contour 13. As shown in Fig. 9, the opening contour 13 of the mounting opening 12 has a width b measured perpendicular to the insertion direction 21. Furthermore, the opening contour 13 of the mounting opening 12 has a height h measured perpendicular to the insertion direction 21. The contact unit 14 and the mounting opening 13 are designed such that the outer contour 15 of the inner section 23, projected onto the projection plane 20 in the insertion direction 21, has a distance a from the opening contour 13 projected onto the projection plane 20 in the insertion direction 21 when attached to the base body 11. This distance a is, in particular, less than 6 mm, in particular less than 5 mm, and in particular less than 4 mm, over at least 60%, and most particularly less than 80% of the width b and / or the height h. The opening contour 13 of the mounting opening 12 and the contact unit 14 are designed such that, when the contact unit 14 is fixed in the base body 11, penetration of the mounting opening 12 or the remaining opening cross-section 27 by a spherical body 28 with a diameter greater than 8 mm is prevented. The spherical body 28 is schematically represented by a dashed circle in Fig. 9. Preferably, the aforementioned penetration is also prevented by a spherical body 28 with a diameter of, in particular, at least 6 mm, and most preferably at least 4.5 mm. This prevents such interfering objects from entering the interior of the housing 2 via the battery compartment 10. In the preferred embodiment of the working device 1, the opening contour 13 of the mounting opening 12, as shown in Fig. 9, comprises at least one opening section 19. This at least one opening section 19 is adapted such that the at least one contact element 17 and / or the at least one guide element 18 can be inserted through the opening section 19. Viewed in the insertion direction 21, the contour of the opening section 19 follows the contour of the at least one contact element 17 and / or the at least one guide element 18. The mounting opening 12 particularly has several adapted opening sections 19. In the preferred embodiment, the mounting opening 12 has five adapted opening sections 19. This number corresponds to the sum of the contact elements 17 and the guide elements 18.The number of adapted opening sections 19 corresponds in particular to the number of contact elements 17 and guide elements 18 arranged side by side and offset transversely to the insertion direction 21. As shown in Fig. 9, the projection of the contact elements 17 and / or the guide elements 18 onto the projection plane 20 in the insertion direction 21 has a distance c to a projection of the opening sections 19 onto the projection plane 20 in the insertion direction 21. This distance c is, in particular, less than 2 mm over the entire opening section 19, more particularly less than 1.5 mm, and most particularly less than 1 mm. In the present embodiment, the opening contour 13 of the mounting opening 12 is subdivided into a base section 29 and several opening sections 19. The contact plate 16 is inserted into the base body 11 of the battery compartment 10 through the base section 29 in the insertion direction 21. The base section 29 has an approximately rectangular base contour. Extending upwards from the base section 29 of the opening contour 13 are the adapted opening sections 19. The contact elements 17 and / or the guide elements 18 are pushed through these adapted opening sections 19 into the base body 11 in the insertion direction 21. The base section 29, together with the opening sections 19, forms the opening contour 13. In other words, the base section 29 and the adapted opening sections 19 form a single opening.The adapted opening sections 19 are oriented in their longitudinal direction essentially perpendicular to the upper edge of the base section 29. The opening sections 19 themselves have a width d which is in particular less than 6 mm, and in particular less than 4.5 mm. In order to make the opening sections 19 as narrow as possible in their width d, the contact elements 17 and / or the guide elements 18 on the contact plate 16 are oriented in such a way that their longitudinal direction corresponds to the insertion direction 21. As shown particularly in Fig. 4, the further mounting opening 12' on the further base body 11' is essentially designed analogously to the mounting opening 12 on the base body 11. Accordingly, the insertion direction 21 of the contact unit 14 through the mounting opening 12 into the base body 11 also corresponds to the insertion direction 21 of the further contact unit 14' through the further mounting opening 12' into the further base body 11'.

Claims

Hand-held work device comprising a housing (2), an electric drive motor (3) arranged in the housing (2), at least one battery compartment (10) arranged on the housing (2) for receiving at least one battery pack (7) for supplying the electric drive motor (3) with electrical energy, wherein the battery compartment (10) comprises a base body (11) and a contact unit (14) for electrically connecting the at least one battery pack (7), wherein the base body (11) has a mounting opening (12) through which the contact unit (14) is inserted into the base body (11) in an insertion direction (21) for fastening the contact unit (14) to the base body (11), wherein the section of the contact unit (14) that is arranged inside the base body (11) is an inner section (23) of the contact unit (14), wherein the inner section (23) has an outer contour (15), characterized in thatthat the mounting opening (12) has an opening contour (13) adapted to the outer contour (15) of the contact unit (14), in particular adapted to a projection of the outer contour (15) in the insertion direction (21) onto a projection plane (20) oriented perpendicular to the insertion direction (21), and which differs from a rectangular contour. Working device according to claim 1, characterized in that the opening contour (13) of the mounting opening (12) has a width (b) and a height (h) measured perpendicular to the insertion direction (21), wherein the distance between the outer contour (15) of the contact unit (14) and the opening contour (13) of the mounting opening (12), projected onto the projection plane (20), is less than 6 mm, preferably less than 5 mm, and in particular less than 4 mm, over at least 60%, preferably at least 80% of the width (b) and / or height (h) of the opening contour (13) of the mounting opening (12). Working device according to claim 1 or 2, characterized in that the opening contour (13) of the mounting opening (12) follows the outer contour (15) of the contact unit (14). Working device according to one of claims 1 to 3, characterized in that the opening contour (13) of the mounting opening (12) is designed to fit precisely the outer contour (15) of the contact unit (14). Working device according to one of claims 1 to 4, characterized in that the opening contour (13) of the mounting opening (12) is designed such that in a mounted state of the working device (1) the penetration of the mounting opening (12) by a spherical body with a diameter greater than 8 mm, in particular greater than 6 mm, and most in particular greater than 3 mm, is not possible. Working device according to one of claims 1 to 5, characterized in that the contact unit (14) has at least one contact element (17) and / or at least one guide element (18), wherein the opening contour (13) of the mounting opening (12) has at least one opening section (19) adapted to the contour of the at least one contact element (17) and / or the at least one guide element (18) for pushing through the contact element (17) and / or the guide element (18). Working device according to claim 6, characterized in that the number of adapted opening sections (19) corresponds at least to the number of contact elements (17) and / or the number of guide elements (18). Working device according to claim 6 or 7, characterized in that a distance (c) between the opening contour (13) in the area of ​​the adapted opening sections (19) and a contact element (17) or guide element (18) when inserting the contact unit (14) into the base body (11) is not greater than 2.0 mm, in particular not greater than 1.5 mm, and most in particular not greater than 1.0 mm. Working device according to one of claims 1 to 8, characterized in that the assembly opening (12) extends to a shaft bottom (24) of the base body (11). Working device according to one of claims 1 to 9, characterized in that the working device (1) comprises at least one further battery compartment (10') arranged on the housing (2) for receiving at least one further battery pack (7') for supplying the electric drive motor (3) with electrical energy, wherein the battery compartment (10') comprises a further base body (11') and a further contact unit (14') for electrically connecting the at least one further battery pack (7'), wherein the further base body (11') has a further mounting opening (12') through which the further contact unit (14') is inserted into the further base body (11') in a further insertion direction (21') for fastening the further contact unit (14') to the further base body (11'), wherein the insertion direction (21) of the contact unit (14') into the mounting opening (12) of the further insertion direction (21') of the further contact unit (14') into the further mounting opening (12') corresponds.

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