Patent Application
20070069524
(a) Field of the Invention
The invention relates to a locking mechanism of a braking device for aluminum doors and windows, and more particularly to a locking mechanism of a braking device for aluminum doors and windows, in that the locking mechanism is suitable for combined sliding and pivot aluminum doors and windows, thereby restraining sliding-across effects when the windows are pushed out without disengaging the locking mechanism.
(b) Description of the Prior Art
Aluminum doors and windows are extensively applied to buildings; and are classified into three types including sliding, pivot, and combined sliding and pivot. Wherein, the combined sliding and pivot type integrates advantages of the sliding and pivot types, and are thus capable of providing larger opened spaces and more diverse designs of opened windows while also reducing a quantity of studs required. In order to prevent the combined aluminum doors and windows from sliding across due to strong winds when outwardly opened, the combined aluminum doors and windows are generally designed with a locking mechanism at a supporting window frame thereof to secure a main window. Referring to the U.S. Pat. No. 6,276,092 showing a prior locking mechanism, a lock hole is provided at a sash support frame of an outer window frame. The hole is installed with a sleeve therein. The sleeve is accommodated around a locking key having a screw at a lower surface thereof, with the screw pressing against a transmission bar. Using the screw, pressing forces of brake lining of a braking device are made adjustable. In addition, a spring is devised below the transmission bar. Thus, when the pivot window is pulled and restored, the locking key is pressed against the transmission bar, such that the brake lining is disengaged from a window groove due to leverage of the transmission bar and the window is pulled to slide horizontally. Vice versa, when the pivot window is pushed to open outwardly, the transmission bar is pressed by elastic restoring forces of the spring, such that the brake lining interlocked with the transmission bar is stopped at a lower groove to immobilize rollers. The aforesaid prior invention is indeed capable of keeping the window stationary when the window is outwardly opened. However, when the window is abruptly pushed outward, instantaneous restoring forces of the spring is likely to cause the locking key to bounce out of the sleeve or even fall downstairs to result in accidents. The prior invention is still considered rather inadequate.
Therefore, it is vital task of the invention as how to overcome the aforesaid drawback by providing a locking mechanism of a braking device according to the invention.
The primary object of the invention is to provide a locking mechanism of a braking device for aluminum doors and windows, in that the locking mechanism is securely positioned to a lower supporting frame of a casement without being disengaged by restoring forces.
To accomplish the aforesaid object, the invention comprises a sleeve and a locking pillar. The sleeve is a hollow tube-shaped structure, which has an expanded projecting rim at an upper end surface thereof; a fastening mechanism consisted of a protruding guide block at an appropriate position below the projecting rim at a tube body, wherein the guide block is extended downward to a lower end surface, such that a dented securing section is formed between the upper end surface of the guide block and the lower end surface of the projecting rim; and a dented locating channel at an interior of the guide block. Or, the fastening mechanism can be devised as an inclined hole that is gradually expanded in a downward direction. The locking pillar has a cone-shaped locking section at an upper surface thereof; a screw opening at a lower surface thereof; a screw fastened into the screw opening and being used for adjusting frictional forces of the braking device using a screwed depth thereof; a fastening section in form of a fixing section at an outer wall thereof, and for corresponding with the locating channel of the sleeve. Wherein, the fixing block is placed in the locating channel in a slidable manner. The fastening section may also have an outer wall thereof devised as an inclined plane to form the locking pillar as a cone shape that is gradually expanded in a downward direction, such that the locking section is protruding from the upper surface of the sleeve. The sleeve is accommodated in a through opening of a supporting window frame of a casement, and the securing section of the sleeve is secured at the through hole of the supporting window frame, thereby allowing sliding movements of the locking pillar in the locating channel of the sleeve without being bounced out or disengaged.
To better understand the characteristics of the invention, detailed descriptions of preferred embodiments shall be given with the accompanying drawings below.
Referring to
The sleeve 10 is provided with a fastening mechanism, and the locking pillar 20 is provided with a corresponding fastening section. According to the invention, the sleeve 10 is a hollow tube-shaped structure, which has an expanded projecting rim 11 at an upper end surface thereof; at least a protruding guide block 12 at an appropriate position below the projecting rim 11 at a tube body, wherein the guide block 12 is extended downward to a lower end surface, such that a dented securing section 13 is formed between the upper end surface of the guide block 12 and the lower end surface of the projecting rim 11; and a dented locating channel 14 at an interior of the guide block 12.
The locking pillar 20 has a cone-shaped locking section 21 at an upper surface thereof; a screw opening 22 at a lower surface thereof as shown in
For assembly, the fixing block 24 of the locking pillar 20 is accommodated using upward sliding movements into the locating channel 14 of the sleeve 10, to an extent that the locking section 21 is protruding from the upper surface of the sleeve 10. The supporting window frame 30 of a casement has an upper board 31 provided with a through opening 32, and at least a notch 33 at an inner wall of the through opening 32. The notch 33 and the guiding block 12 of the sleeve 10 are corresponding concave and convex bodies. The guiding block 12 of the sleeve 10 is embedded in a downward direction into the supporting window frame 30 by aligning with the notch 33 at the through opening 32, followed by being turned into the sleeve 10, such that the securing section 13 is fastened to a position of the upper board 31 without the notch 33. Thus, the locking pillar 20 is allowed with ascending and descending movements in the sleeve 10 without being disengaged.
Referring to
Referring to
Conclusive from the above, the locking mechanism of a braking device for aluminum windows and doors according to the invention accomplishes expected objects of the invention using simple structures.
It is of course to be understood that the embodiment described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.
