Abstract:
Decorative structure for car exhaust pipe, including a freely swingable panel block for a user to mount a decorative article on a surface thereof as desired, an adjusting unit which is freely adjustable in length in accordance with the length of the exhaust pipe and a fastening ring which is adjustable in inner diameter in accordance with the diameter of the exhaust pipe. The decorative structure can be installed on various types of car exhaust pipes with different specifications and diameters to achieve a decorative and beautifying effect.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a decorative structure for car exhaust pipe, which is freely adjustable in dimension in accordance with the specifications of various types of car exhaust pipes. The decorative structure can be easily detachably installed on various types of car exhaust pipes with different specifications and diameters to achieve a decorative and beautifying effect. 
     A conventional exhaust pipe structure of a car generally is designed with one single pipe. In order to enhance the power output of the car, some exhaust pipe structures are designed with double pipes or even more pipes. Such exhaust pipe structure can also achieve a decoration effect. However, the conventional exhaust pipe only has specific usage and is designed with monotonous appearance and lacks novelty. 
     SUMMARY OF THE INVENTION 
     It is therefore a primary object of the present invention to provide a decorative structure applicable to various types and specifications of car exhaust pipes with one or more pipe. The decorative structure includes a freely swingable panel block for a user to mount a decorative article on a surface thereof as desired, an adjusting unit which is freely adjustable in length in accordance with the length of the exhaust pipe and a fastening ring which is adjustable in inner diameter in accordance with the diameter of the exhaust pipe. The decorative structure can be installed on various types of car exhaust pipes to achieve a decorative and beautifying effect. 
     The present invention can be best understood through the following description and accompanying drawings wherein: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective exploded view of a first embodiment of the present invention; 
     FIG. 2 is a perspective partially exploded view of the first embodiment of the present invention; 
     FIG. 3 is a perspective assembled view of the first embodiment of the present invention; 
     FIG. 4 is a plane view of the first embodiment of the present invention, showing the adjustment thereof in one state; 
     FIG. 5 is a plane view of the first embodiment of the present invention, showing the adjustment thereof in another state; 
     FIG. 6 is an enlarged view showing the application of the first embodiment of the present invention to a car exhaust pipe; 
     FIG. 7 shows the application of the first embodiment of the present invention to a car exhaust pipe; 
     FIG. 8 is a perspective partially exploded view of a second embodiment of the present invention; 
     FIG. 9 is a perspective partially exploded view of a third embodiment of the present invention; 
     FIG. 10 is a perspective partially exploded view of a fourth embodiment of the present invention; 
     FIG. 11 is a perspective partially exploded view of a fifth embodiment of the resent invention; 
     FIG. 12 is a perspective partially exploded view of a sixth embodiment of the resent invention; 
     FIG. 13 is a perspective partially exploded view of a seventh embodiment of the present invention; and 
     FIG. 14 is a perspective assembled view according to FIG. 13, showing the application of the seventh embodiment of the present invention to a car exhaust pipe with double pipes. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Please refer to FIG.  1 . The decorative structure for car exhaust pipe of the present invention includes a panel block  1 , an adjusting unit  2  and a fastening ring  3 . 
     The panel block  1  is a rectangular panel body. A decorative picture can be fixedly disposed on the surface of the panel block  1  by screws or an adhesive. The back face of the panel block  1  is formed with a set of thread holes  10 . A pivot block  11  having corresponding through holes  111  is locked at the thread holes  10  by screws. In addition, two sides of the back face of the panel block  1  are formed with projecting connecting wings  12  opposite to each other. Each connecting wing  12  is formed with an arch slot  121 . 
     The adjusting unit  2  includes a fixing bar  20  having a reverse T-shaped cross-section and a slide bar  21  having a reverse U-shaped cross-section. The fixing bar  20  and the slide bar  21  are fitted with each other. A central swelling section of the fixing bar  20  is formed with multiple through locating holes  201 . The bottom face of the fixing bar  20  is formed with multiple shallow circular dents  202  for fixing a restricting member  203  having a U-shaped cross-section. One end of the fixing bar  20  is formed with a fixing section  22  having a recess with arch face for the fastening ring  3  to inlay. A fixing block  23  is mated with the arch face and locked in the recess by screws. Two lateral sides of the slide bar  21  are formed with slots  211  corresponding to the locating holes  201 , whereby when the slide bar  21  is fitted with the fixing bar  20 , screws are passed through the slots  211  and the locating holes  201  to lock the slide bar  21  on the fixing bar  20  with the length adjustable as shown in FIG.  5 . One end of the slide bar  21  is formed with a pair of lugs  24  having aligned through holes  241 . A U-shaped connecting lever  25  is locked under the lugs  24 . Two arms of the connecting lever  25  are formed with orifices  251  corresponding to the arch slots  121  of two connecting wings  12  of the panel block  1  for screws to pass therethrough and tightly locate the panel block  1 . Accordingly, the angle of the panel block  1  can be freely adjusted along the arch of the slots  121  (as shown in FIG.  4 ). 
     Referring to FIG. 1, the fastening ring  3  is a resilient metal sheet which is curled into a hoop. The fastening ring  3  is formed with multiple adjusting bores  30  arranged at equal intervals from one end of the fastening ring  3  by a certain distance. A screw adjuster  31  is disposed at the overlapping sections of two ends of the fastening ring  3 . When the screw adjuster  31  is turned clockwise, the inner diameter of the fastening ring  3  is gradually reduced, while being turned counterclockwise, the inner diameter thereof is gradually enlarged. Therefore, the decorative structure is applicable to various types and specifications of exhaust pipes. 
     The above components are assembled to form the decorative structure for the exhaust pipe as shown in FIG.  3 . 
     Referring to FIGS. 6 and 7, when installed, the decorative structure is mounted at the exit end of the car exhaust pipe  4  with the exhaust pipe  4  passed through the fastening ring  3  and with the end edge of the exhaust pipe  4  fixedly abutting against the U-shaped restricting member  203  under the fixing bar  20 . Then the inner diameter of the fastening ring  3  is adjusted by means of the screw adjuster  31  so as to firmly and quickly fasten the exhaust pipe  4 . 
     The fastening ring  3  and the adjusting unit  2  of the present invention can be easily adjusted in accordance with various specifications of car exhaust pipes  4  so that it is easy to install and detach the decorative structure. Furthermore, different patterns of decorative articles or picture pieces can be freely added to the surface of the panel block  1  and locked thereon by screws or adhered thereto by double-face glue. The decorative articles or picture pieces can be conveniently replaced as desired to highlight personal style and taste. 
     FIGS. 8,  9  and  10  respectively show a second, a third and a fourth embodiment of the present invention. In FIG. 8, the panel block  1  is connected with the adjusting unit  2  by an alternative structure. The opposite faces of two arms of the connecting lever  25  are formed with toothed faces  26  around the orifices  251 . The connecting wings  12  of the panel block  1  are also formed with toothed faces  26  corresponding to the toothed faces  26  of the connecting lever  25 . Accordingly, the panel block and the connecting lever are not so tightly locked by screws and the toothed faces  26  are engaged with each other, permitting a user to freely adjust the angle. In FIG. 9, the connecting bar  25  is replaced by two semispherical bodies intersecting each other by  90  degrees. The plane faces of the two semispherical bodies formed with toothed faces  26 . The lugs  24  of one end of the slide bar  21  and the pivot block  11  of the back face of the panel block  1  are replaced by two semispherical bodies formed with the toothed faces  26  for cooperating with the above semispherical bodies. In FIG. 10, the connecting lever  25  is omitted and one end of the slide bar  21  is alternatively disposed with a spherical cavity  27 . The wall of the spherical cavity  27  is formed with lengthwise opposite splits  271 . The pivot block  11  on the back face of the panel block  1  is replaced by a ball body  272  for fitting into the spherical cavity  27 . Accordingly, it is more easy to manufacture and assemble the decorative structure. 
     FIGS. 11 and 12 further respectively show two simplified structures derived from the second and third embodiments, in which the fastening ring  3  and the adjusting unit  2  are improved. The adjusting unit  2  is only one single fixing bar  20  with a fastening ring  3  integrally formed at one end thereof. The other end of the fixing bar  20  is locked with a connecting lever  25  two arms of which are formed with toothed faces  26 . The fixing bar  20  is also formed with multiple locating holes  201 . A restricting member  203  is locked under the fixing bar  20 . The circumference of the fastening ring  3  is formed with opposite slits  32  in each of which a clip plate  33  is inserted. The clip plate  33  is adjustable by a screw. Accordingly, the fastening ring  3  is fitted around the exhaust pipe  4  and the opposite clip plates  33  are adjusted via the screws to fixedly clip the exhaust pipe  4 . The end of the wall of the exhaust pipe  4  abuts against the restricting member  203  so as to truly locate the decorative structure without swinging and displacement. 
     FIGS. 13 and 14 show an embodiment for installation on a double-pipe exhaust pipe structure  4 . The decorative structure includes identical panel block  1 , adjusting unit  2  and fastening ring  3  and is only different from the above embodiments in that the restricting member  203  under the fixing bar  20  has two stop sections  204  laterally extending from the center of the main body for engaging with the ends of the walls of the double exhaust pipes. Accordingly, the fastening ring  3  is fitted around the double exhaust pipes  4  with the ends of the walls of the double exhaust pipes  4  abutting against the restricting member  203 . At this time, the stop sections  204  of the restricting member  203  extend into the double exhaust pipes  4  and engage therewith. Then the screw adjuster  31  is used to truly fasten the decorative structure on the double exhaust pipes  4 . Under such circumstance, an additional reverse triangular block  205  can be filled in the space between the fastening ring  3  and the double exhaust pipes  4  so as to more firmly install the decorative structure. 
     The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.