Patent Application
20090193929
(a) Field of the Invention
The invention is related to a foldable control lever structure of motorcycle handle, wherein the control lever is constituted by three components to allow the control lever to perform a folding upward function, so that said control lever can be properly folded without causing damage in case of motorcycle falling down causing the control lever to hit the ground. Through pivotal offset between said pivot base and pivot set matching with the external top-pushing spring and internal adjuster buttoning bolt design, relative relationship between said control lever and said motorcycle handle grip can be micro-adjusted according to palm size difference of riders, thereby to obtain best handiness of operation and to effectively resolve the existing problems and imperfections of known products of the like.
(b) Description of the Prior Art
In general, the two handle grips of a motorcycle are usually attached with control levers which is not only used in front, rear wheel braking function, the control lever at the right hand side is also additionally used for clutching function to permit engine startup by pressing the startup button.
Control levers of said motorcycle handles of the like are generally made of aluminum alloy or cast iron which is harder but brittle. Further, said control levers are mostly attached externally to the motorcycle handle grip, therefore in case of unexpected motorcycle falling down, the control lever of motorcycle handle is easy to break when hitting the ground before the handle grip does, thereby results in loss of control lever functions that not only affects transportation safety but also cause additional expense for needing to purchase new products, therefore such designs can not be considered ideal and methods for improvements shall be looked for.
In addition, control levers for said motorcycle handles are usually made to fixed relationships, however, as human palm sizes are varied individually, said fixed type relationship between control lever and handle grip may be too wide for people with smaller palms to hold properly, and too narrow for people with bigger palms, who may have to slightly bend their palms from time to time in order to cope with unexpected occurrence of needs. In other words, no matter for bigger or smaller palms, operating handiness for said control lever is hard to obtain, therefore methods for improvement are necessary.
Regarding the existing problems and imperfections in control levers of motorcycle handle, the inventor has been based on his many years of experiences and skills doing research and improvements to invent the invented foldable control lever of motorcycle handle. i.e. whereby through its structural assembly design, the control lever is effected to pivotally fold up 0-90 degrees, so that when it is impacted by external forces, said control lever can be folded accordingly to avoid hard contact thereof resulting in breaking damages.
Another purpose of the invention is that through the structure assembly design of control lever, relative relationship between control lever and motorcycle handle grip can be adjusted concurrently according to the palm size of the rider, thereby to obtain the best handiness of operation.
To achieve above said disclosed purposes, the invented structure is mainly designed to be constituted by three-pieces assembly including control lever, pivot base and pivot set, wherein control lever is made with a 0-90 degrees pivotal effect relative to pivot base, so that in case of motorcycle falling down causing said control lever to hit the ground, said control lever is folded properly to avoid breaking damages, while through pivotal offset between said pivot base and pivot set matching with the external top-pushing spring and internal adjuster buttoning bolt design, relative relationship between said control lever and said motorcycle handle grip can be micro-adjusted according to palm size difference of riders, thereby to obtain best handiness of operation and to effectively resolve the existing problems and imperfections between the know products of the like.
Structural composition, arts and effects related to the invention is further described with the accompanying Figs. herein:
Referring to structural schematic view in
Said control lever 10 is made with an upward arc concave 11 at one end of the base portion thereof, wherein top edge of said arc concave 11 is continuously made with a stopping raised face 12, and a cut arc 13 is further made above said stopping raised face 12. Said arc concave 11 is continuously formed with a stopping portion 14 at the bottom edge thereof and protrudingly made with a longitudinal extending portion 15 in the middle thereof, which has a axis hole 16 for passing through by bolting axle 1 to pivotally connect with pivot base 20. Said extending portion 15 is further installed with a locking slot 17 thereon at another end thereof to fit with a locking spring set 2 to lockingly limit the relationship between control lever 10 and pivot base 20;
Said pivot base 20 is installed with a pivot hub 21 at one end thereof, outer edge of said pivot hub 21 is made with an arc face to fit with arc concave 11 of control lever 10, wherein said arc face is continuously made with a stopping portion 22 at top edge thereof, edge of said stopping portion 22 thereof is further chamfered for guiding arc concave, and the bottom edge thereof is made with a limiting stop face 23. A longitudinal cut slot 24 is made at middle of pivot hub 21 to fit with extending portion 15 of control lever 10. Further, said pivot hub 21 is penetratingly made a axis hole 25, whereby pivot base 20 and control lever 10 is pivotally combined by bolting axle 1. The said pivot hub 21 of pivot base 20 is made with a slot hole 211 at a designated position of one side thereof to attach with a locking spring set 2, whereby said locking spring set 2 is matched with the locking slot 17 at one side of extending portion 15 of control lever 10 to define the position relationship between said pivot base 20 and control lever 10. Further, said pivot base is continuously made with a horizontal pivot seat 26 at outer edge of another side thereof, said pivot seat 26 is made with a slot hole 27 inside the slot thereof, and penetratingly installed with a pair of axis holes 28 thereon, whereby said pivot base 20 and pivot set 30 are pivotally connected by a screw bolt 3 and a matched axle bush 4.
Said pivot set 30 is assembled to the base position of motorcycle handle grip 40, wherein it is externally installed with an axis portion 31 at one end thereof, said axis portion 31 is made with an axis hole 32 to allow screw bolt 3 matching with axle bush 4 to be pivotally combined inside pivot seat 26 of pivot base 20, thereby to obtain horizontally pivotal offset relationship between pivot base 20 and pivot set 30. At the same time, axis portion 31 of pivot set 30 is externally made with a slot hole 33 and matched with the slot hole 27 at pivot seat 26 of pivot base 20 to house a top-pushing spring 34, whereby said pivot base 20 is pushed by said top-pushing spring 34 to endow said pivot base 20 and its control lever 10 with the inertia of leaning to the motorcycle handle grip 40. Further, a screw hole 35 is provided inside axis portion 31 of pivot set 30 to lockingly installed with a adjuster buttoning bolt 36 which contacts said pivot base 20 at the other end thereof, whereby degree of push on said pivot base 20 by said top-pushing spring 34 is adjusted by said adjuster buttoning bolt 36 so as to achieve the micro-adjustment effect on the relative relationship between control lever 10 and motorcycle handle grip 40;
As disclosed by above structure embodiments, through the longitudinal pivotal design between said control lever 10 and said pivot base 20, said control lever 10 can effected to fold 0-90 degrees upwardly relatively to said pivot base 20. However, it is particularly described herein in that said control lever 10 is made foldable only upwardly in the invented structure design to avoid consequential operating safety concerns on easy folding down of control lever 10 affected by an external force, wherein said stopping portion 14 at bottom edge of arc concave 11 of said control lever 10 is matched with said limiting stop face 23 at arc face bottom edge of pivot hub 21 of pivot base 20 to maintain said control lever 10 and said pivot base 20 at 0° flat limit position, and locking spring set 2 at one side of pivot hub 21 of pivot base 20 is lockingly positioned with locking slot 17 of extending portion 15 of control lever 10 so that flat positioning relationship between control lever 10 and pivot base 20 is strengthened to avoid easy folding by an external force. Once said control lever 10 is impacted by an external force due to motorcycle falling down or an accident, as long as the acting force is bigger than the one of locking spring set 2, said control lever 10 can be effected to fold: upward, wherein stopping raised face 12 at the top edge of arc concave 11 of control lever 10 and stopping portion 14 at arc face top edge of pivot hub 2 of pivot base 20 are mutually pushed to obtain the folding limit, and further through the match between cut arc 13 at top edge of stopping raised face 12 of control lever 10 and the designed guiding edge of stopping portion 22 of pivot base 20 to make said control lever 10 to actually achieve the 90° folding effect, thereby due to the movable folding effect of said control lever 10 particularly in case of motorcycle falling down to contact the ground, said control lever 10 can be properly folded without causing damage so as to elongate its work life and normal operating functions, thus effectively resolves the existing problems and imperfections of the known structures.
In other respect, due to the offset pivotal relationship between pivot base 20 and pivot set 30, pivot base 20 is externally pushed by top-pushing spring 34 to endow said control lever 10 with the inertia of leaning to the motorcycle handle grip 40, whereby through adjustment by adjuster buttoning bolt 36 lockingly installed inside pivot set 30, said pivot base 20 is reversely pushed by said adjuster buttoning bolt 36 so as to change the degree of push by top-pushing spring 34 on pivot base 20. The relative relationship and distance between said pivot base 20 along with its pivotally attached control lever 10 and said motorcycle handle grip 40 can be micro-adjusted, whereby the relationship between said control lever 10 and said motorcycle handle grip 40 can be micro-adjusted according to palm size difference of riders to enhance handiness of operation, therefore it is practically more useful comparing with other known structures.
Through above descriptions, the invention is aiming to improve the structure design for the control lever of motorcycle handle, wherein said control lever is pivotally combined with said pivot base to allow said control lever to perform the 0-90 degree folding effect when impacted by an external force, so that breaking damage losses due to hard hit can be avoided while operating performance can be maintained, thereby to extend work life and reduce the consequential maintenance and repair costs. While through pivotal offset between said pivot base and pivot set matching with the external top-pushing spring and internal adjuster buttoning bolt design, relative distance between said control lever and said motorcycle handle grip can be micro-adjusted according to palm size difference of riders, thereby to obtain best handiness of operation and to effectively resolve the existing problems and imperfections between the know products of the like, so that it is valuable in industrial application and practical usefulness.
As summarized from above descriptions, the foldable control lever structure of the invention, through its innovated design of structure, the foldable control lever structure of the invention not only has the advantage of folding upward the control lever under external force to avoid damage, but is also able to micro-adjust the relationship between control lever and motorcycle handle grip according to palm size of the rider, thereby to obtain the best handiness of operation and to endow very good industrial usefulness and practical values, as such, it is an excellent and outstanding innovated design, therefore the patent application is submitted according to law.
