Locking arrangement for a cover part of a subscriber terminal device
View Patent ↗The present invention relates to a locking arrangement for a cover structure of a portable terminal device of a telecommunication system. The cover structure comprises at least one frame part ( 14 ), a cover part ( 16 ) connected to the frame part that can be removed from the frame part by the user, and locking elements for attaching the cover part to the frame part. In order that one could achieve a secure attachment and locking for the accumulator cover or accumulator packet of the device that at the same time enables the eliminating of the excessive clearances between the can parts, the locking elements comprise, in the frame part and cover part, slide bars ( 50, 51 ) and slide grooves ( 80 ) corresponding to each other.
1. A locking arrangement for a cover structure of a portable terminal device of a telecommunication system, said cover structure comprising at least one frame part ( 14 ), a cover part ( 16 ) connected to the frame part that can be removed from the frame part by the user, and locking elements for attaching the cover part to the frame part, wherein the locking elements comprise, in the frame part and cover part, slide bars ( 50 , 51 ) and slide grooves ( 80 ) corresponding to each other, and that the slide grooves are provided with horns of a groove extending over the grooves in a transverse direction of the grooves, and the slide bars are provided with locking grooves, corresponding to the horns of a groove, the locking grooves extending over the slide bars in the transverse direction of the bars, into which the horns of a groove settle when the cover is in place in the frame part, wherein the slide bars include a wedge tip part in which the locking grooves have been formed.
2. A locking arrangement according claim 1 , wherein the locking elements comprise, in addition, spring locking elements that are adapted to press the cover part being put in place away from the frame part so that the slide bars and grooves are pressed against one another in the aforementioned transverse direction.
3. A locking arrangement according to claim 1 or 2 , wherein the cover part comprises side walls on whose inner surfaces the slide bars have been fitted, and that the slide grooves have been fitted into the outer surface being against the aforementioned inner surfaces of the frame part.
4. A locking arrangement according to claim 1 , wherein the slide bars comprise substantially parallel thin walls ( 52 , 53 ), said parallel thin walls being in the transverse direction separated from each other, so that empty space is left between the parallel thin walls, and the parallel thin walls are integrated into a solid wall structure at the ends.
5. A locking arrangement according to claim 2 , wherein the spring locking elements comprise arched locking protruding parts ( 62 , 63 ) made of metal that yield when the cover is in place in the frame part.
6. A locking arrangement according to claim 5 , wherein it comprises, in addition, at least two locking gutters, into which the locking protruding parts have been fitted to settle, when the locking horns of a groove settle in the locking grooves.
7. A locking arrangement according to claim 1 , wherein the cover part is the cover of the accumulator space of the terminal device.
8. A locking arrangement according to claim 1 , wherein the cover part comprises the accumulators of the terminal device.