Surface treatment device with remote unlocking means for an accessory device

Abstract

The invention relates to a surface treatment device (1) having a base device (3) with a device housing (2) and an accessory device (5) which is detachably connected to an interface (4) of the base device (3), wherein the base device (3) has a remote unlocking device (6) by means of which a user of the surface treatment device (1) can effect the detachment of the accessory device (5) from the base device (3), wherein the remote unlocking device (6) has an operating element (7), an unlocking mechanism (8) and an interface element (9) for connection to a fitting element of the accessory device (5). In order to provide a remote unlocking device (6) which is ergonomic and intuitive to operate, according to the provision the operating element (7) is an operating ring which is rotatably supported on a cylindrical housing portion region (16) of the device housing (2), wherein the operating element (7) has in particular a radially protruding action element (17) for operation by means of a hand of the user.

Description

Technical Field

[0001] This invention relates to a surface treatment apparatus having a base device with an apparatus housing and an accessory device detachably connected to the base device via an interface. The base device has a remote unlocking device by means of which the user of the surface treatment apparatus can separate the accessory device from the base device. The remote unlocking device has an operating element, an unlocking mechanism, and an interface element for connecting to an adapter element of the accessory device. Background Technology

[0002] Various surface treatment devices are well known in the prior art, capable of being used with a variety of different accessory devices. The housing of the base device has an interface on which various accessory devices can be arranged, depending on the selection. The accessory devices can be selected by the user according to the surface treatment operation to be performed.

[0003] Surface treatment equipment can be cleaning equipment, such as suction and / or scrubbing equipment, but it can also be polishing equipment, grinding equipment, lawnmowers or other equipment.

[0004] In order to enable users to comfortably detach accessory devices from a base device without bending over, remote unlocking devices are known in the prior art. These remote unlocking devices enable the detachment of the accessory device from the interface using an operating element located away from the interface for the accessory device. This method allows for operation of the operating element with minimal force and one hand, without requiring the user to operate the accessory device located away from the operating element. A surface treatment apparatus with such a remote unlocking device is shown, for example, in utility model DE 299 01 595 U1. The remote unlocking device is operated by means of a button. Summary of the Invention

[0005] Although the aforementioned remote unlocking devices have proven effective in the prior art, the technical problem to be solved by the present invention is to provide an alternative remote unlocking device, which is particularly equipped with an operating element that can be operated in an ergonomic manner.

[0006] To address the aforementioned technical problems, it is specified that the annular operating element is an operating ring rotatably supported on a cylindrical housing portion of the equipment housing. In this case, it is particularly specified that the operating element has a radially projecting actuating element for operation by means of the user's hand.

[0007] According to the present invention, a user can trigger a remote operating device of a surface treatment apparatus via a rotatably supported operating ring, which is positioned around a cylindrical housing portion of the apparatus housing. Here, the user's hand preferably acts relative to a protruding actuating element to achieve rotation of the operating element. Unlike operating elements configured as buttons, for example, the rotatably supported operating element allows for ergonomic operation, especially when the cylindrical portion supporting the operating element is located on an area typically positioned on the surface treatment apparatus for the user's hand. Furthermore, the user can achieve stepless and appropriately controlled release of the accessory apparatus by rotating the operating element. The actuating element of the operating element, for example, acts as a point of application for the user's thumb or finger to transmit force to the remote unlocking device. Here, depending on the configuration of the unlocking mechanism of the remote unlocking device, operation can be configured either in only one rotational direction or in two opposite rotational directions. The possibility of operation in two opposite rotational directions can be advantageous if the user can use the surface treatment apparatus, for example, by utilizing different orientations of their hand relative to the apparatus housing of the base device. This is particularly advantageous when the operating element is arranged, for example, on a pivotable handle of a surface treatment device, which the user can pivot relative to the device housing, for example, 180 degrees, for different purposes.

[0008] Furthermore, it is specified that the operating element is supported on a housing portion of the device housing, which is associated with a joint of a pivotable handle for the surface treatment device. According to this design, the surface treatment device has a handle that can pivot relative to the device housing of the base device via a joint. In this manner, the handle can pivot to different orientations relative to the base device, for example, to a first position and a second position. In the first position, the handle forms an extension of the device housing of the base device. In the second position, the handle is pivoted as compactly as possible to the base device, i.e., after pivoting to the outer contour of the base device in a side view, such that the handle extends substantially parallel to the longitudinal extension of the device housing. In the second position, the surface treatment device is preferably usable as a portable device that is not supported on the surface to be treated during surface treatment, or whose weight is almost entirely borne by the user during the surface treatment process. In this orientation, the surface treatment device also has a compact design so that the user can apply it to surfaces other than the floor, such as stair treads, shelves, baseboards, window glass, and other surfaces above the floor. Since the joints for the pivotable handle are preferably cylindrical in shape, and the corresponding housing portion also has a cylindrical design, the operating element, configured as an operating ring, is particularly advantageously arranged around the joint. The housing portion of the device housing and the housing portion of the handle can, in particular, constitute mutually adaptable elements of the joint, with the operating element arranged coaxially between these elements. Since the user will use the handle to guide and / or carry the surface treatment equipment regardless, the user can intuitively and ergonomically operate the operating element of the remote unlocking device without having to release their hand from the handle or switch hands on the handle to access the operating element.

[0009] As specified, the operating element is supported by spring elements in at least one axial direction on an adjacent housing portion of the base equipment via a cylindrical housing section. This design provides clearance-free support for the operating element on the equipment housing or handle. For example, spring elements can be arranged on the operating ring, supporting it on an adjacent housing portion, such as spring legs acting on a portion of the equipment housing or handle. Such spring elements can be constructed either on only one end of the operating ring or on both sides. One configuration may specify that spring legs are arranged on the inner side of the operating ring, pressing the ring away from a mating support on the equipment portion, and external hooks or other guiding elements are arranged on opposite end sides, pressed towards the direction of the spring legs via adjacent housing portions. Thus, the operating element is supported axially with virtually no clearance.

[0010] Furthermore, it can be specified that the device housing has a stop element associated with the operating element, which limits the operating stroke of the operating element, and in particular limits the rotation angle of the rotatably supported operating ring. For example, a portion of the housing adjacent to the operating element may have a protrusion that functions as a mating stop, which limits the movement path of the operating element. The mating stop may, in particular, fit into the annular track of the operating element and act relative to the stop element of the operating element at that location. This limits the rotation of the operating ring to a predetermined angular range.

[0011] Furthermore, it is specified that the unlocking mechanism of the remote unlocking device has a pivot shaft fixedly arranged on the base equipment. A pivot element is pivotally supported on the pivot shaft by two pivot arms positioned opposite each other, referencing the pivot shaft. The first pivot arm is connected to an operating lever leading to an operating element, and the second pivot arm is connected to an interface rod leading to an interface element. This allows the pivot element to pivot about the pivot shaft when the operating element is operated by the user, thereby enabling the interface element to move relative to the adapter element of the accessory device. The force acting on the operating element is transmitted to the interface element via the pivot element. Here, when the first pivot arm connected to the operating element is loaded, for example, with a tensile force to generate a thrust on the interface rod connected to the second pivot arm, the interface rod subsequently moves or operates the interface element, thereby releasing the accessory device from the base equipment. The pivot element pivotally supported on the pivot shaft thus serves as a steering rod, on which an operating lever is constructed at one end and an interface rod is constructed at the other end. By operating the actuating element, i.e., rotating the actuating ring, a pulling force is applied to the actuating lever via the actuating rod. This pulling force is converted into a corresponding thrust force on the interface rod through a pivot point. This thrust force is then applied to the interface element via the interface rod, thereby detaching the accessory device from the base of the surface treatment equipment. The transmission ratio of the actuating force from the actuating lever to the interface rod can be adjusted by changing the length ratio of the levers. As an alternative to loading the actuating lever with pulling force by operating the actuating element, the actuating lever can also be loaded with thrust force. This depends on the selected operating direction of the actuating element, which is achieved, for example, by rotating the actuating ring counterclockwise or clockwise.

[0012] According to regulations, the operating lever and interface lever are constructed as link-like elements with a main longitudinal extension. Thus, a long, as thin as possible lever, such as a connecting rod, extends from the pivot arm of the pivot element to both the operating element and the interface element. This link-like construction allows the lever to be installed particularly simply and at a greater distance within the housing of the surface treatment equipment. Consequently, the lever is arranged space-savingly within the limited structural space of the housing, even when the interface element and operating element are spaced considerably apart on the housing.

[0013] Furthermore, it is specified that the operating element and the operating lever are constructed as a single unit. This also preferably applies to the transition between the interface lever and the interface element. This design eliminates the need to assemble numerous small parts in the remote unlocking device. In particular, injection molding allows multiple components to be integrated into a single unit.

[0014] According to regulations, a spring element is configured for the pivoting element, and the restoring force of the spring element forces the pivoting element into a preferred position. The spring element can be attached to a first pivot arm, a second pivot arm, or both pivot arms of the pivoting element. The spring element presses the pivoting element back to the initial position, which is equivalent to the preferred position, in which the operating element is in an inactive position and the interface element, i.e., the adapter element of the locking accessory device, is fixedly held. The spring element can be constructed as a leaf spring, disc spring, coil spring, etc.

[0015] Furthermore, it can be specified that the free end region of the second pivot arm is supported in a ball joint manner within a support region of the interface rod, which is constructed as a joint socket. According to this design, the interface rod has a support point in its end region facing the pivot element, and a portion of the second pivot arm of the pivot element is fitted into this support point. For example, the cam or spherical end region of the second pivot arm can be fitted into a spherically shaped recess in the interface rod. This generally forms a ball joint-like structure, where the pivoting movement of the joint is preferably restricted to the pivot plane. This connection shape allows for tolerances between the two components, namely the second pivot arm of the pivot element and the interface rod, and simplifies the subsequent assembly of the components of the remote unlocking device.

[0016] Finally, it is specified that the interface element has a hook rotatably supported on the equipment housing about a pivot axis. Specifically, a spring element can be configured for the interface element, the restoring force of which forces the interface element into a preferred position, in which the interface element engages with the adapter element of the accessory device. According to this design, the interface element itself is also rotatably supported on the equipment housing about a pivot axis, thereby transforming the pushing motion of the interface rod into a traction motion acting on the interface element, which releases the adapter element of the accessory device. The pivoting motion of the hook can be adjusted by changing the length of the rod before and after the pivot axis of the interface element. Attached Figure Description

[0017] The present invention will now be described in detail with reference to the embodiments. In the accompanying drawings:

[0018] Figure 1 A surface treatment apparatus according to the present invention is shown.

[0019] Figure 2The rear portion of the surface treatment apparatus according to the invention, including the first portion with a handle and a remote unlocking device, is shown in the disassembly diagram.

[0020] Figure 3 The disassembly diagram shows the front portion of the surface treatment device with a second part featuring a remote unlocking device.

[0021] Figure 4 The remote unlocking device is shown in 3D.

[0022] Figure 5 A side view of the remote unlocking device is shown.

[0023] Figure 6 This image shows a portion of the surface treatment equipment along with a remote unlocking device mounted within it.

[0024] Figure 7 A side view of the remote unlocking device in its initial, inactive position is shown.

[0025] Figure 8 The basis for indicating the already operated position Figure 7 Remote unlocking device. Detailed Implementation

[0026] Figure 1An exemplary surface treatment device 1 is shown, which is configured, for example, as a handheld guided cleaning device, i.e., configured as a handheld guided vacuum cleaner. The surface treatment device 1 has a base device 3 and an interface 4 for detachable connection to an accessory device 5. The accessory device 5 can be detachably connected to the base device 3 via the interface. The accessory device 5 can be, for example, a suction nozzle and / or cleaning element, such as a rotary brush roller, etc. Furthermore, if the surface treatment device 1 is alternatively configured as a lawnmower, polishing device, sanding device, etc., the accessory device 5 is correspondingly a lawnmower tool, polishing tool, sanding tool, etc. The invention shown in the following figures is not affected by this. The surface treatment device 1 can be operated both with and without the accessory device 5. For example, the surface treatment device 1 can be used to treat floor surfaces with the accessory device 5, or it can be used to treat surfaces above the floor without the accessory device 5 connected to it, such as vacuuming shelves, cleaning windows, etc. The base device 3 has a device housing 2 and a handle 19 disposed on the device housing. The user can guide the surface treatment equipment 1 during normal operation, for example, by moving it over the surface to be treated, using the handle 19. Here, the user typically pushes and pulls the surface treatment equipment 1 alternately in opposite directions. A switching device 27 with switching elements is arranged on the handle 19, for example, an on / off switch for the power supplies of the surface treatment equipment 1, such as motors for fans, cleaning components, etc. Furthermore, the switching device 27 allows adjustment, for example, of the treatment intensity for the surface treatment. The surface treatment equipment 1 can be connected to a household power grid via a power plug in a conventional manner and / or has a battery for powering the power supplies.

[0027] The handle 19 is pivotally arranged on the device housing 2, for example, about the joint 18. The joint 18 is used to pivot the handle 19 relative to the device housing 2 to, for example, two defined final positions, which are opposite each other by a pivot angle of 180 degrees. In principle, more final positions can be provided. Figure 1The first final position of the handle 19 is shown, in which the handle extends to the extension line of the longitudinal extension of the base device 3 of the surface treatment apparatus 1. Similarly, a second final position can be provided, in which the handle 19 swings back onto the base device 3. In the extended position described above, the handle 19 forms an extension of the base device 3, thus eliminating the need for the user to bend over towards the floor surface to be treated. Conversely, the second final position of the handle 19 is, for example, a pivot angle of 180 degrees from the first final position, so that the handle 19 swings back onto the base device 3, i.e., the handle 19 is oriented parallel to the opposite direction relative to the initially shown position. In this position, the user can advantageously use the surface treatment apparatus 1 for treating surfaces above ground, where a compact surface treatment apparatus 1 with its center of gravity close to the user's hand is advantageous.

[0028] Figures 2 to 8 Another embodiment of the surface treatment apparatus 1 according to the present invention is shown. To enable pivoting of the handle 19 to a position, for example, 180 degrees opposite each other, the joint 18 has two mutually movable housing portion regions 16, wherein a first housing portion region 16 is associated with the apparatus housing 2 and a second housing portion region 16 is associated with the handle 19. Furthermore, the handle 19 also has two handle members 25, 26, namely a lower handle member 25 and an upper handle member 26. The lower handle member 25 has the aforementioned housing portion region 16 (see, for example, see...). Figure 2 The handle 19 is generally pivotable relative to the device housing 2, that is, pivots about a rotation axis in the axial direction a with its longitudinal extension.

[0029] An operating element 7 of a remote unlocking device 6 is arranged between the base device 3 and the corresponding housing portion 16 of the handle 19. When operated, this operating element releases the accessory device 5 from the base device 3 of the surface treatment equipment 1. The operating element 7 is primarily annular in design, with radial protrusions serving as actuating elements 17. The annular operating element 7 is arranged coaxially with respect to adjacent housing portion 16 and is rotatably supported between these housing portion 16 about a common axis of rotation. This support can be achieved, for example, by spring legs supported on at least one housing portion 16. Thus, the operating element 7 is advantageously pressed upward toward the handle 19, while the housing portion 16 of the handle 19 presses the operating element 7 downward as a cover, thereby forming a gapless support for the operating element 7 with reference to the axial direction a. Furthermore, the operating element 7 preferably (not shown here) has a stop element that limits the rotation angle of the operating element 7. The remote unlocking device 6 is particularly as follows: Figures 2 to 5As shown, it consists of an operating element 7, an unlocking mechanism 8, and an interface element 9 for detachable connection with an adapter element for the accessory device 5. The unlocking mechanism 8 includes elements of the remote unlocking device 6 that transmit movement of the operating element 7 to the interface element 9, thus causing the accessory device 5 to be released by the interface element 9 when the operating element 7 is rotated by the user. The unlocking mechanism 8 mainly has an operating lever 14, a pivoting element 11, and an interface rod 15. Starting from the operating element 7, the operating lever 14 is connected to the operating element 7 and is connected to a first pivoting arm 12 of the pivoting element 11. A second pivoting arm 13 of the pivoting element 11 is connected to the interface rod 15. The interface rod 15 is then guided to the interface element 9. The pivoting element 11 is pivotally supported on a pivot shaft 10, which is formed or fixed to the device housing 2 of the base device 3. The pivoting arms 12 and 13 are located on opposite circumferential sides of the pivot shaft 10 of the pivoting element 11. Here, the operating element 7, the operating lever 14, and the first pivot arm 12 are constructed integrally, for example, wherein the operating lever 14 and / or the first pivot arm 12 can be partially made of a flexible material that allows for relative mobility of the operating lever 14 relative to the first pivot arm 12. A hinge 28, here a membrane hinge, can also be provided in the transition region from the operating lever 14 to the first pivot arm 12. The second pivot arm 13 of the pivot element 11 is supported by a cam-shaped end region 21 in a support region 22 of the interface rod 15, for example a U-shape, and is supported by a portion of the first spring element 20 adapted relative to the device housing 2, so that the pivot element 11 is moved back to its preferred rotational position when the user no longer applies force to the operating element 7. The free support of the end region 21 of the second pivot arm 13 in the support region 22 of the interface rod 15 simplifies the subsequent assembly of the operating lever 14 or the interface rod 15. Furthermore, tolerances for the operating lever 14, pivot element 11, and interface lever 15 are achieved without limiting the functionality of the remote unlocking device 6. Here, for example, the interface element 9 is integrally connected to the interface lever 15. A hinge 29, which is also made of an elastic material, exists in the transition region between the interface lever 15 and the interface element 9. The interface element 9 is rotatably supported on the device housing 2 about the pivot axis 23. The end region of the interface lever 15 that carries the interface element 9 is further supported on the device housing 2 by a second spring element 24, wherein the restoring force of the second spring element 24 acts to push the interface element 9 back to the locked position.

[0030] Figure 6The remote unlocking device 6 is shown in its assembled state within the surface treatment apparatus 1. In the indicated position of the handle 19 relative to the device housing 2 of the base device 3, a right-handed user, for example, uses their index or middle finger to act on the actuating element 17, causing the operating element 7 to rotate clockwise relative to the adjacent housing portion 16. Alternatively, the operating element 7 may also have such an actuating element 17 on the opposite circumferential side to allow operation using the thumb, or the surface treatment apparatus 1 may also be designed advantageously for a left-handed user. Clockwise operation of the operating element 7 triggers a pulling motion of the operating lever 14, which is transmitted to the interface element 9 via the unlocking mechanism 8. The interface element 9 then releases the adapted portion of the coupled accessory device 5. In particular, the following combination... Figure 7 and Figure 8 The workings of the various components of the unlocking mechanism 8 required for this purpose will be explained in more detail here. Figure 7 The initial position of the operating element 7 before rotation is shown. Figure 8 Conversely, this shows the situation when the operating element 7 has been rotated clockwise and thus the interface element 9 has been raised.

[0031] The invention operates as follows: The user operates the operating element 7 clockwise, thereby rotating the pivot element 11 around the pivot axis 10, i.e., counterclockwise, via the operating lever 14 and hinge 28. This simultaneously tensions the first spring element 20, whose restoring force attempts to return the pivot element 11 to its initial pivot position. During the resulting rotation of the pivot element 11 around the pivot axis 10, the interface lever 15 is loaded with a thrust toward the interface element 9, which is rotatably but fixedly supported on the pivot axis 23. The pushing movement of the interface lever 15 causes deformation of the hinge 29, which in turn causes counterclockwise rotation of the interface element 9. Figure 8 As shown, interface element 9 thus flips upward and separates from the fitting portion of accessory device 5. Accessory device 5 is thus released and can be detached from interface 4 of base device 3 of surface treatment equipment 1. Simultaneously with the flipping of interface element 9, the second spring element 24 is also tensioned, i.e., compressed, and the restoring force of the spring element aims to return interface element 9 to its original position. Figure 7 The locking position is shown. Once the user stops applying force to the operating element 7 and thus to the unlocking mechanism 8, the unlocking mechanism 8 is reset and moved to its original position via the associated first spring element 20 and second spring element 24. Figure 7 The preferred position shown is independent of whether the accessory device 5 is on the base device 3.

[0032] In the illustrated embodiment, the remote unlocking device 6 is designed such that the user applies a pulling force to the operating lever 14 using the operating element 7. Alternatively, it is also feasible to design the unlocking mechanism 8 such that the user applies a pushing force to the operating lever 14 by rotating the operating element 7. Other embodiments can also be designed such that the user can optionally rotate the operating element 7 clockwise or counterclockwise.

[0033] List of reference numerals

[0034] 1 Surface treatment equipment

[0035] 2 Equipment casing

[0036] 3. Basic equipment

[0037] 4 Interfaces

[0038] 5. Accessory Equipment

[0039] 6. Remote unlocking device

[0040] 7 Operating elements

[0041] 8 Unlocking mechanism

[0042] 9 Interface Components

[0043] 10 Pivot axis

[0044] 11 Pivoting elements

[0045] 12 First pivot arm

[0046] 13 Second pivot arm

[0047] 14. Control lever

[0048] 15 Interface rod

[0049] 16. Shell section area

[0050] 17. Functional Elements

[0051] 18 joints

[0052] 19 Handle

[0053] 20 First Spring Element

[0054] 21 End region

[0055] 22 Support Area

[0056] 23 Pivot axis

[0057] 24 Second spring element

[0058] 25 Upper handle piece

[0059] 26 Lower handle piece

[0060] 27 Switching device

[0061] 28 Hinges

[0062] 29. Hinges

[0063] a. Axial direction.

Claims

1. A surface treatment device (1) having a base device (3) with a device housing (2) and an accessory device (5) which is detachably connected with an interface (4) of the base device (3), wherein The base device (3) has a remote unlocking device (6) by means of which a user of the surface treatment device (1) can effect the detachment of an accessory device (5) from the base device (3), wherein the remote unlocking device (6) has an operating element (7), an unlocking mechanism (8) and an interface element (9) for connection with an adaptation element of the accessory device (5), characterized in that the operating element (7) is an operating ring which is rotatably supported on a cylindrical housing portion region (16) of the device housing (2), wherein the unlocking mechanism (8) comprises those elements of the remote unlocking device (6) which transmit a movement of the operating element (7) to the interface element (9), so that when the operating element (7) is rotated by the user, the accessory device (5) is released by the interface element (9).

2. The surface treatment apparatus (1) according to claim 1, characterized in that The annular operating element (7) has a radially protruding action element (17) for operation by the hand of the user.

3. The surface treatment apparatus (1) according to claim 1, characterized in that The operating element (7) is supported on a housing portion region (16) of the device housing (2), which housing portion region is assigned to a joint (18) of a pivotable handle (19) for the surface treatment device (1).

4. The surface treatment apparatus (1) according to claim 1, characterized in that The operating element (7) is supported in at least one axial direction (a) of the cylindrical housing portion region (16) on an adjacent housing portion region (16) of the base device (3) by means of a spring element.

5. The surface treatment apparatus (1) according to claim 1, characterized in that The device housing (2) has a stop element assigned to the operating element (7), which limits the operating travel of the operating element (7).

6. The surface treatment apparatus (1) according to claim 5, characterized in that The stop element limits the angle of rotation of the rotatably supported operating ring.

7. The surface treatment apparatus (1) according to claim 1, characterized in that The unlocking mechanism (8) has a pivot axis (10) which is fixedly arranged on the base device (3), a pivot element (11) being pivotably supported on the pivot axis with two pivot arms (12, 13) which are opposite one another with reference to the pivot axis (10), wherein a first pivot arm (12) is connected to an operating lever (14) which is guided to the operating element (7) and a second pivot arm (13) is connected to an interface lever (15) which is guided to the interface element (9), so that when the operating element (7) is operated by the user, a pivoting movement of the pivot element (11) about the pivot axis (10) is triggered and, as a result, a movement of the interface element (9) relative to the adaptation element of the accessory device (5) is triggered.

8. The surface treatment apparatus (1) according to claim 7, characterized in that The operating lever (14) and the interface lever (15) are configured as link-like elements with a longitudinal extension.

9. The surface treatment apparatus (1) according to claim 7, characterized in that The operating element (7) is configured in one piece with the operating lever (14).

10. The surface treatment apparatus (1) according to claim 7, characterized in that The pivot element (11) is provided with a first spring element (20) whose restoring force forces the pivot element (11) into a preferred position.

11. The surface treatment apparatus (1) according to claim 7, characterized in that A free end region (21) of the second pivot arm (13) is supported in the manner of a ball joint in a support region (22) of the interface lever (15) which is configured as a socket.

12. The surface treatment apparatus (1) according to claim 1, characterized in that The interface element (9) has a hook which is rotatably supported on the device housing (2) about a pivot axis (23).

13. The surface treatment apparatus (1) according to claim 12, characterized in that A second spring element (24) is provided for the interface element (9), the restoring force of which forces the interface element (9) into a preferential position in which the interface element (9) forms an engagement with the adaptation element of the accessory device (5).

Images