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[0001] The present invention relates to a operating handle for devices, in particular cleaning devices, such as wiping devices, mops, brooms, or the like.
[0002] Two-piece operating handles per se are known. However, they are designed in such a way that to connect two tubular handle elements, two connecting links are provided. One link affixed to the first handle element and the other link affixed to the second handle element. In this context, one of the connecting links has an assembling pin with a screw thread, and the other has a corresponding thread. The disadvantage of this known construction is that is complicated to manufacture and consequently expensive, particularly since two connecting links are needed to connect two handle elements. Furthermore, the known operating handles lack stability at the points of connection of the individual handle elements.
[0003] The object of the present invention is to provide an operating handle that is particularly simple and inexpensive to produce and features a high level of stability.
[0004] This object is achieved by an operating handle having a first and a second tubular handle element. The tubular handle elements form a hollow space. A connecting link for connecting the first and second tubular handle elements is provided. The connecting link projects into the hollow space formed by the handle elements. The connecting segment is designed to connect to the first handle element and the second connecting segment is designed to connect to the second handle element. The first and/or second connecting segment has a screw-in thread that can be forced into engagement with connecting agents arranged on the first and/or second handle segments. The first and/or second connecting segment has a supporting surface for resting against the inner surface of the handle element. The screw-in thread is arranged in the region of the supporting surface. In this way, a stable connection of two handle elements is achieved using a single connecting link. As a result of the supporting surfaces resting against the inside of the handle element, forces are transferred in an especially effective manner. Since only one connecting link is needed to connect the two handle elements, manufacturing costs can be greatly reduced.
[0005] Advantageously, the connecting agents are designed as at least one projection that protrudes into the hollow space formed by the handle elements. This projection can then be forced into engagement with the thread that is arranged on the connecting link in the region of the supporting surface.
[0006] In another aspect of the present invention, the connecting agents may be designed as at least two projections that are arranged on one imaginary, spiral connecting line. In this context, the slope of the imaginary, spiral connecting line corresponds to the thread pitch of the screw-in thread. This construction has the advantage that the manufacturing costs can be significantly reduced since the handle element does not require a threaded insert, nor does an expensive thread have to be formed.
[0007] When the handle element is made of metal, it is particularly easy to form the projections in an inexpensive manner by deforming the handle element in a point-by-point manner. These so-called prick-punched points, for example, can be created on the outside of the handle element, thereby enabling the rod material to be deformed to form projections that jut into the hollow space formed by the handle elements.
[0008] An additional improvement is achieved by providing, in the region between the first and second connecting segments, the connecting link with a flange that projects beyond the supporting area, from the first and/or second connecting segment. This flange acts as a stop for the screw-in thread and allows the screw-in thread to create a tensile stress and/or compressive stress which increases the stability in the region of the connection between the handle element and the connecting link.
[0009] In accordance with a preferable embodiment of the present invention, the connecting segments have an essentially cylindrical design. As a result, the connecting segment is adapted to the likewise preferably cylindrical hollow space in the interior of the tubular handle element. In this way, a large contact surface between the supporting surfaces of the connecting segment and the tubular handle elements can be achieved.
[0010] Costs can be reduced even further if the connecting link has a hollow design. Furthermore, it is advantageous if the connecting link is made of plastic, in particular of polyamide.
[0011] A particularly inexpensive manufacturing method is also achieved in that the connecting link only has a thread in the region of the first connecting segment, and in that the supporting surface is formed as a cylinder in the region of the second connecting segment. In this case, the second connecting segment and the second handle element can be joined by inserting the cylindrical connecting segment into the handle end and by subsequently deforming the tubular material. This results in a friction-locked and/or form-locked connection between the handle element and the second connecting segment. In this context, for a secure connection, it is sufficient when the deformation is carried out in a point-by-point manner, e.g., by creating prick-punched points.
[0012] The drawings show a preferred exemplary embodiment of the present invention. The figures show:
[0013]
[0014]
[0015]
[0016]
[0017]
[0018] For connecting the first handle element
[0019]
[0020] In the specific embodiment illustrated in
[0021] The connecting agents
[0022] In accordance with the present exemplary embodiment, the tubular handle elements
[0023] In the region between the first connecting segment
[0024] The connecting segments
[0025] Alternatively to the representation in