Patent Application
20060081277
The present invention relates to a side-supporting umbrella and particularly to a side-supporting umbrella canopy of which can be adjusted to tilt to any angles with respect to the mast, and controlling line of which is inside-installed.
The outdoor leisure activities are the best and most popular way to relax tension from busy weekday work. People can always enjoy their leisure time from outdoor activities, such as picnic, camping, barbecue, etc. However long time and over solarization during outdoor activities makes ones intolerable, not only the skin will become swarthy, but also ones may get sunstruck from ultraviolet, or even suffer a heat exhaustion. Therefore, ones often employ a sunshade or umbrella to avoid exposure to direct sunlight. However, the radiating angle of the sun shifts during times, and the conventional umbrella cannot meet the need.
Referring to a prior art “Improved Angle-Adjusting Structure of Crank-Hanging Umbrella” of Taiwan Patent published No. 485769, the angle-adjusting structure of this prior art comprises a cylindrical housing and a tilt-fixing mechanism disposed inside the housing. The canopy-supporting arm is engaged fixedly with the angle-adjusting portion. The direction-shifting part, which is in the lower part of the angle-adjusting portion, undertakes direction-shifting function inside the housing, and the canopy-supporting arm changes its angle responsively, and thus the shielding range of the canopy is adjusted. The displacement element of the tilt-fixing mechanism is screwed upward to press tightly the limiting element and fix the angle-adjusting portion, and thus the angle of the canopy is fixed. This prior art utilizes the direction-shifting part inside the housing to undertake angle adjustment. However the sphere diameter of the direction-shifting part is larger than that of the opening of the housing, thus there is always abrasion between the direction-shifting part and the opening of the housing, and the opening of the housing tends to be worn and deformed. Consequently, the direction-shifting part cannot be fixed firmly, and the angle adjustment of the crank-hanging umbrella cannot be performed.
Referring to another prior art published U.S. Pat. No. 5,937,882, the tilt-adjusting mechanism disclosed therein includes: a collar, slidably mounted along the mast, and pivotally connected to a supporting arm of the canopy, with the canopy tilting angle being adjusted through the sliding movement of the collar along the mast and the sequentially actuated movement of the supporting arm; and a plurality of positioning holes on the mast, with a selected one inserted through by a lock element to lock the position of the collar on the mast and determine the canopy tilt angle. As those positioning holes are disposed at a given interval, the canopy tilt angles are limited to those discrete positions of the positioning holes, and therefore the umbrella cannot shield all the solar radiation, which may come from any direction. One end of a connecting brace pivotally attaches at the top of the mast, and the other end pivotally connects to the supporting arm of the canopy. The mast has a winder, which utilizes a line passing through the umbrella to enable the canopy to open or close via a series of sequentially actuated movements of the interlinked elements. One end of the line is wound on the winder, and the other end passes through tubes of the mast and arm to connect with a knob immediately below the lower hub of the canopy. By turning the winder, the line is wound or released to enable the canopy to open or close. The path of the line begins from the winder, and then extends through the tube of the mast to a first pulley, and then extends downward outside the mast to pass over a second pulley carried by the collar, and then extends along a the tube of the arm to pass over a third pulley at the top of the canopy, and downward through a upper hub of the canopy to the lower hub, and then terminates below the lower hub. The line path between the first pulley and the second pulley is exposed to the environment, and to be easily worn, damaged, and finally broken, and then the umbrella cannot operate any more. Accordingly, life of the umbrella is shortened.
The primary objective of the side-supporting umbrella of the present invention is to provide a tilt-adjusting structure installed between a mast of an umbrella and a supporting arm of a canopy, comprising a collar, which can slide along the mast in a continuously variable manner and adjust the tilt of the canopy in combination with a sequentially actuated movement of the interlinked supporting arm, and is able to be fixed at any position of the mast by a locking element. Accordingly, the canopy can be adjusted to any tilt attitude, and shield the solar radiation coming from any direction. Thus, the problems of the prior art can be improved that the collar can only be fixed at the predetermined discrete positions via inserting the locking element therethrough into one of positioning holes disposed at a set of given positions along the mast, and then the adjustment of the canopy can only be limited to a set of predetermined tilts.
Another objective of the present is to prevent a line from wear or damage resulting from exposure thereof to the environment and resulting in incapability of the umbrella operation. Therefore, the present invention designs anew an extending path of the line, which enables the canopy to open or close via a series of sequentially actuated movements of the interlinked elements, to prevent the line from exposure to the environment and avoid the wear or damage of the line in order to prolong the life of the umbrella and promote the operating safety.
According to one aspect of the present invention, the mast and the supporting arm of the canopy are interconnected with a connecting brace pivotally, and the collar is connected to the supporting arm pivotally also. The mast has a crank-driving winder, on which a line is wound, and via crank-driving the winder, the line is driven to control the canopy to open or close. An upper hub is installed at the top of the canopy, and a lower hub is installed below the upper hub coaxially. Disposing spaces are form inside the mast, the connecting brace and the supporting arm separately. The line begins from the winder, and extends through the disposing spaces to the upper hub, and then connects to the lower hub in order to achieve the aforementioned objective.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
Referring to
A tilt-adjusting structure according to one embodiment of the present includes: a collar 13, having a holding portion 131 mounted cylindrically through the mast 10, and able to slide between the winder 11 and the top of the mast 10 in a continuously variable manner. An assembling portion 132 projects from the holding portion 131. The assembling portion 132 is pivotally connected to the supporting arm 21 via inserting a locking element 15 through a washer 16, the assembling portion 132 and the supporting arm 21, and screwing those fixedly with a nut 15a. The holding portion 131 has a slot 134. The holding portion 131 is gripped fixedly and positioned on the mast 10 via inserting a positioning element 14 through the assembling portion 132 and screwing a nut 14a to press the slot 134 tightly. Besides, a lining sleeve 133 can be installed inside the holding portion 131 to reduce friction resulting from a sliding motion between the collar 13 and the mast 10 and prevent the mast 10 from wear and deformation
As the radiating direction of the sun is always shifting, users have to adjust the tilt attitude of the canopy responsively to match the radiating condition and avoid direct exposure to the sunlight.
Referring to
Vice versa, while the collar 13 slide upward, the holding portion 131 of the collar 13 is moved from the position adjacent to the winder 11 to the position adjacent to the top of the mast 10, and thus the tilt attitude of the canopy 20 is also changed. As the actions of the reverse operation are similar to those described above, its description will not repeat.
Referring to
Those described above is only the preferred embodiments of the present invention, and it is not intended to limit the scope of the present. Any equivalent variation or modification according to the spirit or the appended claims of the present invention is to be included within the scope of the present invention.
