Telescopic parasol stand |
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申请号 | EP04076642.0 | 申请日 | 2004-06-04 | 公开(公告)号 | EP1602297B1 | 公开(公告)日 | 2012-10-03 |
申请人 | Activa Leisure Inc.; | 发明人 | Ma, Oliver Joen-an; | ||||
摘要 | |||||||
权利要求 | |||||||
说明书全文 | The invention relates to a combination of a telescopic stand and a parasol, wherein the stand comprises:
In this publication a mechanism is described for driving the second tubular element relative to the first tubular element. This mechanism comprises a worm gear drivable by a handle, which worm gear drives two reels onto which a cord is wound and unwound. This cord extends through the tubular elements and is guided such that the second tubular element can be extended out of the first tubular element. The cord is also connected to the parasol such that by driving the reels the telescopic stand is first extended and then the parasol is opened. It is however not possible to independently open or close the parasol. Opening of the parasol is only possible having the second tubular element in its fully extended position. Furthermore, the mechanism using a cord for moving the second tubular element relative to the first tubular element is rather susceptible for defects for example caused by breakage of the cord or jamming of the cord at one of the several pivot areas around which the cord is guided. It is therefore an object of the invention to provide a combination of a telescopic stand and a parasol, wherein the telescopic parasol stand is more robust and more reliable and wherein the parasol can be operated independently of the position of the second tubular element relative to the first tubular element. This object is achieved according to the invention by a combination, wherein the drive engages on the outside surface of the second tubular element, and the reel is arranged in the second tubular element. Because the drive engages on the outside surface of the second tubular element a very simple construction is achieved, which is virtually maintenance free and, if some problems occur, repairs can simply be performed as the drive only engages the outer surfaces of the second tubular element. Because the operating cord is guided through the inside of the second tubular element, the operating cord is protected against weather influences, which prolongs the life span of the cord. By driving the reel, the operating cord can be wound or unwound and in this way the parasol can be opened or closed. This reel can for example be operated by a crank, which can also be used for manual operation of the drive. In a preferred embodiment of the telescopic stand according to the invention the outside surface of the second tubular element comprises a tooth rack and the drive comprises a gear engaging on the tooth rack. By using a tooth rack and gear the second tubular element can be positively driven without any slippage between the drive and the second tubular element. In another embodiment of the telescopic stand according to the invention the drive comprises a wheel engaging on the outside surface of the second tubular element. Such an embodiment can be manufactured at low costs and still provides a functional and simple design. Preferably at least one of the contact surfaces of the wheel and the outside surface of the second tubular element comprises a friction layer. This friction layer is arranged in order to suppress any possible slippage between the drive wheel and the second tubular element. Preferably this friction layer comprises rubber. In yet another embodiment of the telescopic stand according to the invention the drive comprises a crank for manual operation of the drive. This is a simple solution, but it is also possible to use a motor in order to operate the drive. In another preferred embodiment according to the invention the first tubular element and the second tubular element are in longitudinal direction arched. Preferably the arc of the first and second tubular elements is an arc of a circle. With such an embodiment it is possible to place the stand next to a table while having the parasol above this table. These and other advantages of the invention will be elucidated in conjunction with the accompanying drawings.
A drive wheel 6 is arranged at the first tubular element 3 and extends partially through the element 3. The wheel 6 has a friction layer 7 of a suitable rubber and is in direct contact with the outer surface of the second tubular element 4. The wheel 6 can be manually operated by a crank 8. By rotating the crank 8 the wheel 6 is operated and the second tubular element 4 can be retracted or extended independently of the position of the parasol 2. So with this embodiment according to the invention it is possible to adjust the height of parasol 2 without having to close the parasol as was a disadvantage of the prior art. At the first tubular element 12 a drive 16 is arranged for retracting and extending the second tubular element 13 relative to the first tubular element 12. The drive 16 is operable by a crank 17. Inside the second tubular element 13 a reel 18 is present along which a cord 19 is wound, which is guided through the second tubular element 13 and is used to open and close the parasol 15. In In In |