Abstract:
A multi-functional support pole and a rotation telescopic control structure thereof are provided. The multi-functional support pole includes a base, a first rigid tube, a second rigid tube, a third rigid tube, a rotation telescopic control assembly, a vertical rotation folding control assembly, and an apparatus mounting portion to realize the functions of a 360-degree horizontal rotation, an up-down extension, a vertical rotation angle adjustment, and so on. The size of the support pole is reduced after folding. The whole support pole is mainly composed of rigid tubes to improve the structural strength of the support pole and the stability of use.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a support pole, and more particularly to a multi-functional support pole and a rotation telescopic control structure thereof used for supporting a mobile phone, a tablet computer, a computer auxiliary apparatus, or a multi-media apparatus. 
     BACKGROUND OF THE INVENTION 
     A conventional support poles has some drawbacks. For example, it is inconvenient to adjust the angle of the support pole as desired; the overall size of the support pole is big, which is inconvenient for storage and carrying; in order to allow a certain degree of deformation for adjusting the angle of the support pole, the support pole is composed of soft tubes. When in use, the support pole may shake and is not stable, so the user needs to re-adjust the location of the support pole many times. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a multi-functional support pole and a rotation telescopic control structure thereof to realize the functions of a 360-degree horizontal rotation, an up-down extension, a vertical rotation angle adjustment, and so on. The size of the support pole is reduced after folding. The whole support pole is mainly composed of rigid tubes to improve the structural strength of the support pole and the stability of use. 
     According to an aspect of the present invention, a rotation telescopic control structure used for a support pole is provided. The rotation telescopic control structure comprises a first rigid tube, a second rigid tube, an inner sleeve, and an outer sleeve. The inner sleeve has a first connecting portion and a second connecting portion. The first connecting portion is connected to the second rigid tube. The second connecting portion has two or more pawls to form a deformable fitting trough. A gap is formed between the adjacent pawls. An outside of each pawl is formed with outer threads. The outer sleeve has a first receiving trough therein. The first receiving trough includes an upper press-fit locking trough, a middle unlocking trough, and a lower inner threaded trough which penetrate through the first receiving trough. An inner wall surface of the upper press-fit locking trough has a press-fit surface which is gradually enlarged from top to bottom. The middle unlocking trough has a cross-section greater than that of the upper press-fit locking trough. The first connecting portion has a second receiving trough penetrating the deformable fitting trough. A stop stepped face is formed between an inner wall surface of the second receiving trough and inner wall surfaces of the pawls. The first rigid tube is inserted into the second receiving trough. An upper end of the first rigid tube abuts against a lower side of the stop stepped face. An inner wall surface of the first rigid tube is provided with a first telescopic limit projection. A lower end of the second rigid tube is provided with an end plug. A lower end of the end plug having a second telescopic limit protrusion projecting outwardly from an outer surface of the second rigid tube. The second rigid tube is inserted through the deformable fitting trough into the first rigid tube. The outer sleeve is screwed to an outside of the inner sleeve. The inner threaded trough is mated with the outer threads. The second telescopic limit protrusion is limited below the first telescopic limit protrusion. 
     Preferably, the first rigid tube and the second rigid tube are metal tubes. 
     According to another aspect of the present invention, a multi-functional support pole is provided. The multi-functional support pole comprises a base, a first rigid tube, a second rigid tube, a third rigid tube, a rotation telescopic control assembly, a vertical rotation folding control assembly, and an apparatus mounting portion for mounting an apparatus. A lower end of the first rigid tube is connected to the base. The rotation telescopic control assembly is connected between the first rigid tube and the second rigid tube. The vertical rotation folding control assembly is connected between the second rigid tube and the third rigid tube. The third rigid tube is rotatable and foldable relative to the second rigid tube. The apparatus mounting portion is connected to the third rigid tube. The rotation telescopic control assembly includes an inner sleeve and an outer sleeve. The inner sleeve has a first connecting portion and a second connecting portion. The first connecting portion is connected to the second rigid tube. The second connecting portion has two or more pawls to form a deformable fitting trough. A gap is formed between the adjacent pawls. An outside of each pawl is formed with outer threads. The outer sleeve has a first receiving trough therein. The first receiving trough includes an upper press-fit locking trough, a middle unlocking trough, and a lower inner threaded trough which penetrate through the first receiving trough. An inner wall surface of the upper press-fit locking trough has a press-fit surface which is gradually enlarged from top to bottom. The middle unlocking trough has a cross-section greater than that of the upper press-fit locking trough. The first connecting portion has a second receiving trough penetrating the deformable fitting trough. A stop stepped face is formed between an inner wall surface of the second receiving trough and inner wall surfaces of the pawls. The first rigid tube is inserted into the second receiving trough. An upper end of the first rigid tube abuts against a lower side of the stop stepped face. An inner wall surface of the first rigid tube is provided with a first telescopic limit projection. A lower end of the second rigid tube is provided with an end plug. A lower end of the end plug having a second telescopic limit protrusion projecting outwardly from an outer surface of the second rigid tube. The second rigid tube is inserted through the deformable fitting trough into the first rigid tube. The outer sleeve is screwed to an outside of the inner sleeve. The inner threaded trough is mated with the outer threads. The second telescopic limit protrusion is limited below the first telescopic limit protrusion. 
     Compared to the prior art, the present invention has obvious advantages and beneficial effects. Specifically, according to the aforesaid technique, the present invention is able to achieve the functions of a 360-degree horizontal rotation, an up-down extension, a vertical rotation angle adjustment, and so on, meeting the different demands of users. The support pole can be folded and unfolded easily. The size of the support pole is reduced after folding, which is convenient for storage and carrying. The support pole of the present invention is designed more humanized than the traditional support pole. The whole support pole is mainly composed of rigid tubes to improve the structural strength of the support pole and the stability of use and to prolong the service life of the support pole. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view according to an embodiment of the present invention; 
         FIG. 2  is a front view according to the embodiment of the present invention; 
         FIG. 3  is a sectional view according to the embodiment of the present invention; 
         FIG. 4  is an enlarged view taken from a circle A of  FIG. 3 ; 
         FIG. 5  is an enlarged view taken from a circle B of  FIG. 3 ; 
         FIG. 6  is an enlarged view taken from a circle C of  FIG. 3 , showing a screw locking rotation control structure; 
         FIG. 7( a )  is an enlarged view, showing another rotation control way (a damping rotation control structure) of the first or second vertical rotation folding control assembly according to the embodiment of the present invention; 
         FIG. 7( b )  is an exploded view of  FIG. 7( a ) ; 
         FIG. 8  is an enlarged view taken from a circle D of  FIG. 3 ; 
         FIG. 9  is a schematic view of the embodiment of the present invention in a folded state; 
         FIG. 10  is a schematic view showing that the third rigid tube is turned 90 degrees according to the embodiment of the present invention; 
         FIG. 11  is a schematic view showing that the third rigid tube is turned to be parallel to the second rigid tube according to the embodiment of the present invention; and 
         FIG. 12  is a schematic view showing that the whole support pole is fully folded according to the embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
     As shown in  FIG. 1  through  FIG. 12 , a preferred embodiment of the present invention comprises a base  10 , a first rigid tube  20 , a rotation telescopic control assembly  30 , a second rigid tube  40 , a first vertical rotation folding control assembly  50 , a third rigid tube  60 , a second vertical rotation folding control assembly  70 , and an apparatus mounting portion  80  for mounting an apparatus. The first rigid tube  20 , the second rigid tube  40 , the third rigid tube  60  and a fourth rigid tube  90  described below are preferably metal tubes, such as aluminum alloy tubes or the like which is excellent in structural strength and excellent stability in use. The base  10  may be provided with a data charging interface or the like. 
     The second rigid tube  40  is inserted downwardly into the first rigid tube  20 . The second rigid tube  40  is rotatable about the rotation telescopic control assembly  30  and can be horizontally rotated 360 degrees relative to the first rigid tube  20 . The second rigid tube  40  is disposed in an up-down telescopic manner relative to the first rigid tube  20 . The third rigid tube  60  is rotatable about the first vertical rotation folding control assembly  50  and is rotatably folded or unfolded in a first vertical plane relative to the second rigid tube  40 . The apparatus mounting portion  80  is rotatable about the second vertical rotation folding control assembly  70  and is rotatably folded or unfolded in a second vertical plane relative to the third rigid tube  60 . The first vertical plane and the second vertical plane are perpendicular to each other. In a folded state, the third rigid tube  60  and the second rigid tube  40  are parallel to each other. 
     As shown in  FIG. 3  and  FIG. 4 , the rotation telescopic control assembly  30  includes an inner sleeve  31  and an outer sleeve  32 . The inner sleeve  31  has a first connecting portion  311  and a second connecting portion  312 . The first connecting portion  311  is connected to the second rigid tube  40 . The second connecting portion  312  has two or more pawls to form a deformable fitting trough, and a gap is formed between the adjacent pawls. An outside of each pawl is formed with outer threads. The outer sleeve  32  has a first receiving trough  321  therein. The first receiving trough  321  includes an upper press-fit locking trough  3211 , a middle unlocking trough  3212 , and a lower inner threaded trough  3213  which penetrate through the first receiving trough  321 . An inner wall surface of the upper press-fit locking trough  3211  has a press-fit surface which is gradually enlarged from top to bottom. The middle unlocking trough  3212  has a cross-section greater than that of the upper press-fit locking trough  3211 . 
     The first connecting portion  311  has a second receiving trough  3111  penetrating the deformable fitting trough. A stop stepped face  313  is formed between an inner wall surface of the second receiving trough  3111  and inner wall surfaces of the pawls. The first rigid tube  20  is inserted into the second receiving trough  3111 . An upper end of the first rigid tube  20  abuts against a lower side of the stop stepped face  313 . An inner wall surface of the first rigid tube  20  is provided with a first telescopic limit projection  21 . A lower end of the second rigid tube  40  is provided with an end plug  41 . A lower end of the end plug  41  has a second telescopic limit protrusion  411  projecting outwardly from an outer surface of the second rigid tube  40 . The second rigid tube  40  is inserted through the deformable fitting trough into the first rigid tube  20 . The outer sleeve  32  is screwed to an outside of the inner sleeve  31 . The inner threaded trough  3213  is mated with the outer threads. The second telescopic limit protrusion  411  is limited below the first telescopic limit protrusion  21 . 
     In the locked state, the press-fit surface of the outer sleeve  32  tightens all the pawls, and the pawls brace the second rigid tube  40 . During the rotational adjustment of an angle, the press-fit surface of the outer sleeve  32  is moved upwardly away from the pawls to release the pawls. The middle unlocking trough  3212  is displaced up to the position that the press-fit surface initially braces the pawls. At this time, the pawls don&#39;t brace the second rigid tube  40 , so that the second rigid tube  40  can be rotated freely, achieving a 360-degree horizontal rotation. The second rigid tube  40  can be rotated to a desired angle. Meanwhile, the second rigid tube  40  can be extended and retracted in the first rigid tube  20 , and its telescopic state is as shown in  FIG. 9 . 
     As shown in  FIG. 3 ,  FIG. 5  and  FIG. 6 , the first vertical rotation folding control assembly  50  and the second vertical rotation folding control assembly  70  each include a pivot assembly and two connecting pivot seats  105  that are pivotally connected to the pivot assembly. The pivot assemblies of the first vertical rotation folding control assembly  50  and the second vertical rotation folding control assembly  70  are parallel to each other in the axial direction and are located in a transverse plane. The pivot assembly is a screw locking rotation control structure  106 . A screw is used to lock or unlock the two connecting pivot seats  105 , so that the two connecting pivot seats  105  can be relatively rotated or fixed. As shown in  FIGS. 7 ( a )  and  7  ( b ), the pivot assembly is a damping rotation control structure  107 . The corresponding rigid tubes are held for the rotation action. The operation is relatively more convenient. The damping rotation control structure  107  includes a shaft fixing piece  108 , a first damping sheet  109 , a damping sleeve  110 , a damping outer sleeve  111 , a damping shaft  112 , a spacer  113 , a damping tightness adjustment ring  114 , a second damping sheet  115 , a nut  116 , a third damping sheet  117 , and a bolt  118 . 
     As shown in  FIG. 3  and  FIG. 8 , the fourth rigid tube  90  is connected between the apparatus mounting portion  80  and the second vertical rotation folding control assembly  70 . A ball universal joint assembly is connected between the apparatus mounting portion  80  and an upper end of the fourth rigid tube  90 . In general, the ball universal joint assembly comprises an outer bracket  101 , an inner spherical claw  102 , and a ball joint shaft  103 . A ball end of the ball joint shaft  103  is fitted in the inner spherical claw  102 . The outer bracket  101  is mated with the outer periphery of the inner spherical claw  102 . A pivot end of the ball joint shaft  103  is connected with the upper end of the fourth rigid tube  90  (including direct connection or through other fittings). When the outer bracket  101  is loosened, the ball end of the ball joint shaft  103  can be rotated in a multi-directional manner. 
     As shown in  FIG. 3 ,  FIG. 5  and  FIG. 10 , the upper end of the second rigid tube  40 , the lower end of the third rigid tube  60 , the upper end of the third rigid tube  60 , and the lower end of the fourth rigid tube  90  are connected to respective connecting pivot seats  105 . The connecting pivot seat  105  connected to the upper end of the second rigid tube  40  and the connecting pivot seat  105  connected to the upper end of the third rigid tube  60  are formed with respective rotation limitation stop surfaces 104  for limiting the rotation angles of the third rigid tube  60  and the fourth rigid tube  90  respectively. The rotation range of the third rigid tube  60  is from the corresponding rotation limit stop surface  104  to a position in which the third rigid tube  60  is turned downwardly parallel to the second rigid tube  40 . The rotation range of the fourth rigid tube  90  is from the corresponding rotation limit stop surface  104  to a position in which the fourth rigid tube  90  is turned downwardly parallel to the third rigid tube  60 . Here, the first vertical rotation folding control unit  50  is provided with the rotation limit stop surface  104 , and the connection pivot seat  105  connected with the second rigid tube  40  is provided with the aforementioned rotation limit stop surface  104 . In the unfolded state, the third rigid tube  60  is located on the right side of the second rigid tube  40  and parallel to the second rigid tube  40 . The fourth rigid tube  90  is located on the left side of the third rigid tube  60  and in the same axial direction as the second rigid tube  40 . The third rigid tube  60  can turn left 90 degrees and turn right 180 degrees to be parallel to the second rigid tube  40 . The fourth rigid tube  90  can turn left or right 180 degrees. 
     Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.