The invention is directed to a handle shell to be installed in an opening in a thin wall, having a flange part, fastening elements proceeding from or being received in the flange part for fastening the flange part to the thin wall, and with a shell part.
A handle shell of the kind mentioned above is already known, for example, from Brochure 6-230 by DIRAK or from DE 297 20 992 U1. The known arrangement has a sloping grip surface that can be engaged by hand. When sheet-metal doors or drawers open stiffly, the hand may slip from this sloped surface. The grip surface should also, if possible, extend at right angles to the pulling direction of the hand, that is, parallel to the thin wall. However, it is very difficult to produce grip areas of this kind in handle shells because complicated tools with gates are required for injection molding corresponding plates which are grasped from behind.
Also, sealing presents problems in the known arrangement.
Finally, there should be the option of providing two back-grip surfaces located opposite from one another.
It is the object of the invention to provide a handle shell for installation in an opening in a thin wall which does not have the drawbacks mentioned above and which can be constructed in such a way that there are two grip surfaces located opposite from one another.
The above-stated object is met in that the flange part and shell part are two separate structural component parts, in that the flange part has a first flange supported on the edge of the opening in the thin wall, and in that the shell part of the handle shell has another flange which is enclosed in such a way by the first flange and its fastening elements after being installed that it extends between the thin wall and the first flange part.
This makes it possible to make do without a complicated injection mold and, at the same time, to produce back-grip surfaces in which there is no risk that the hand will slip off in stiffly operating doors or drawers. Further, it is possible to shape the shell so as to form two oppositely located surfaces which can be gripped from behind and handling is facilitated.
Good stability is achieved when the additional flange is enclosed (
According to a another embodiment form, a snap-type installation is made possible when the fastening elements proceeding from the first flange interact in a snap-like manner with an edge of the opening when installed and have a run-in sloped surface and a holding sloped surface at approximately right angles to the latter.
Screw fastening is also possible, e.g., when the fastening elements received by the first flange are fastening screws which are guided through bore holes or notches or openings in the thin wall.
The openings provided in the thin wall for the fastening elements can be widened and/or provided with additional notches.
According to another embodiment form, additional openings can also be provided in the thin wall for the fastening elements.
The additional flange can be provided with notches and/or openings for receiving fastening elements or for allowing the fastening elements to pass through.
According to another embodiment form, the holding element can be a slide which is arranged in the first flange so as to be displaceable parallel to the thin wall.
The slide can be mounted so as to be displaceable perpendicular to the longitudinal extension of the handle shell.
According to another embodiment form, the holding element is U-shaped or V-shaped in cross section and is secured to the first flange by one leg, its second leg forming a tongue which is movable in a springing manner in direction of the longitudinal extension of the handle shell.
This embodiment form corresponds to the prior art with respect to operation, but in the prior art the tongue can only be arranged at one side, whereas in the invention tongues of this kind can be provided at two oppositely located longitudinal edges so that it is possible to provide two surfaces that can be engaged by the hand.
The flange and the fastening element proceeding from it can be injection-molded in one piece from plastic.
The fastening element that is injection molded from plastic can have a metal spring reinforcement to reinforce the plastic whose strength may possibly be insufficient.
A metal spring reinforcement of this kind can contact the inner sides of the U-leg or V-leg made of plastic.
Alternatively, the metal spring reinforcement encloses at least the free end of the U-leg or V-leg forming the tongue.
According to another embodiment form, the metal spring reinforcement encloses the entire U-leg or V-leg forming the tongue.
The opening or openings in the thin wall can be sealed by sealing rings which surround the cross section of the shell proceeding from the additional flange and/or the cross section of the fastening elements proceeding from the first flange.
According to a further development of the invention, the shell part with its flange can be preassembled at the flange part of the handle shell.
The grip hole of the flange part of the handle shell can have narrowed portions for forming undercuts to facilitate gripping.
Grip strips can extend inward in direction of the shell part from the edges of the grip hole of the flange part.
The invention will be explained more fully in the following with reference to embodiment examples shown in the drawings.
Because the handle shell comprises two parts it is possible to provide the external flange part 116 with narrowed portions in the grip hole 130 enclosed by the flange part 116 and flange 128 to form undercuts 132 in order to facilitate gripping for narrowed portions 134. Because of this construction in two parts, the flange part 116 with the fastening elements—insofar as the latter are connected in one piece with the flange part—and the shell part 126 with its conical shell can easily be injection molded with simple injection molds.
Accordingly, the two parts can be designed in such a way that the flange 128 of the shell part 126 can be received in a recessed surface 136 on the back of the flange part 116 (see
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Reliability is further increased when grip strips 572 proceed from the edges of the grip hole 530 and of the flange part 516 inward in direction of the shell part 526.
It is also possible to carry out the fastening by means of screws, which is not shown. The screws are guided through bore holes or notches or openings in the thin wall. The first flange can have threaded blind holes which open into the flange supporting surface and accept the screws, whose heads are supported, e.g., on the back of the thin wall.
The invention is commercially applicable in switch cabinet construction.
Number | Date | Country | Kind |
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20 2006 012 797.6 | Aug 2006 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP07/05286 | 6/15/2007 | WO | 00 | 2/23/2009 |