BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of the ceiling mount of the present invention;
FIG. 2 is an exploded perspective view of the core of the ceiling mount of the present invention;
FIG. 3A is a top end view showing that the arms of the core are retracted;
FIG. 3B is a top end view showing that the arms of the core are extended;
FIGS. 4A and 4B are schematic side plan views showing that the two extending arms are gradually descending in response to the rotation of the threaded bolts;
FIG. 5 is a schematic side plan view with partial in cross section showing that the two arms of the core abut a side face of the ceiling to support a load attached to the base of the ceiling mount; and
FIG. 6 is a perspective view showing a conventional fixing mount.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to FIG. 1, it is noted that the ceiling mount in accordance with the present invention includes a core (1) and a base (3). The base (3) is provided with a threaded hole (31) defined through a face of the base (3) to mesh an outer threading (111) formed on a bottom extension (not numbered) of the core (1) such that the core (1) is able to detachably and threadingly combine the base (3).
With reference to FIG. 2, it is noted that the core (1) of the present invention is composed of a cylindrical body (11) having the bottom extension formed at a lower portion of the cylindrical body (11), two arms (12) and two threaded bolts (13).
The cylindrical body (11) further has two cutouts (112) defined in two opposed sides of the bottom extension and a sectorial passage (113) is defined in a bottom face of each of the cutouts (112) to communicate with the cutouts (112) respectively. Two indentations (114) are oppositely defined in an outer periphery of the cylindrical body (11) to communicate with a corresponding one of the cutouts (112) via a first threaded hole (110) defined in a bottom face defining the indentation (114). A stop (115) is formed on a top end of the cylindrical body (11) and on two opposite sides of the stop (115), a sectorial cutout (116) is defined to conform to a perimeter of a corresponding one of the two indentations (114). A through hole (117) is defined through the cylindrical body (11) and the stop (115).
The two arms (12) are each arcuate in shape in this embodiment, but the shape of the two arms (12) should not be limited only to the embodiment shown. Each arm (12) is provided with a sectorial head (121) dimensioned to be snugly fitted in the sectorial cutout (116) and the indentation (114) of the cylindrical body (11) and an arcuate extension (122) integrally formed with an outer periphery of the sectorial head (121). The arcuate extension (122) is configured and dimensioned in such a way that an outer periphery thereof is in accordance with the outer periphery of the cylindrical body (11) when the sectorial head (121) is fully received in the sectorial cutout (116) of the stop (115). Each sectorial head (121) is further provided with a second threaded hole (123) communicating with a corresponding one of the two first threaded holes (110). Each of the two threaded bolts (13) is able to threadingly extend through the first threaded hole (11) in the bottom extension of the cylindrical body (11) and the second threaded hole (123) of the sectorial head (121). Furthermore, a cylindrical extension (124) is formed at a lower portion of the sectorial head (121) and dimensioned to fully conform to an outer contour of the sectorial head (121) so that the cylindrical extension (124) is able to be fully received in the indentation (114) of the cylindrical body (11).
With reference to FIGS. 3A, 3B, 4A and 4B, when the core (1) of the present invention is assembled, each threaded bolt (13) is threadingly extended through a corresponding one of the two first threaded holes (11) of the cylindrical body (11) from a corresponding one of the sectorial passages (113) and into one of the two second threaded holes (123) of the arms (12). Thus due to the threading connection among the threaded bolts (13), the first threaded holes (110) and the threaded second holes (123), the threaded bolts (13) are secured to the cylindrical body (11).
As shown in FIG. 3A, before rotation of the threaded bolt (13), the arcuate extension (122) is connected to an outer periphery of the stop (115) with the sectorial head (121) received in the sectorial cutout (116) of the stop (115) and the cylindrical extension (124) received in the indentation (114). Then after the threaded bolt (13) is rotated, initially the arcuate extension (122) is driven to rotate simultaneously due to the friction with the corresponding threaded bolt (13), which extends the arcuate extension (122) out of the cylindrical body (11), as shown in FIG. 3B. However, when the arcuate extension (122) is rotated to a degree where an outer periphery of the arcuate extension (122) abuts a free end of the stop (155), rotation of the arcuate extension (122) is topped.
As the threaded bolt (13) continues to rotate, because the sectorial head (121) is snugly received in the indentation (14), the sectorial head (121) gradually descends in the indentation (114) when the threaded bolt (13) is rotated in a first direction. Alternately adjusting the position of the two arcuate extensions (122) is able to maintain the two arcuate extensions (122) at a horizontal level.
With reference to FIG. 5 and still using FIG. 1 for reference, it is noted that the outer threading (111) of the bottom extension of the cylindrical body (11) is meshed with the threaded hole (31) of the base (3). Thereafter, the operator is able to alternately rotate each threaded bolt (13) to extend the two arcuate extensions (122). Because the base (3) is connected to one side of the ceiling (4), the two extended arcuate extensions (122) are able to gradually engage with the other side of the ceiling (4), which provides a supporting force to any load added to the base (3). For example, an illuminating instrument, e.g. a light tube, or a surveillance camera may be mounted to the base (3) and the two extended arcuate extensions (122) are able to providing the required supporting force to the load attached to the base (3). Further, it may be appreciated that although the description above focuses on two arcuate extensions (122), one arcuate extension (122) may also accomplish the designated purpose.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Application
20080054148
