Abstract:
An adjustable stand holder includes a stand base including a base frame, an axle holder and a guide track arranged at the base frame at right angles, a cover member including a cover frame pivotally coupled to the axle holder and a smoothly curved stop flange raised from a front side of the cover frame for supporting a mobile electronic device on the cover frame, and a wheel receivable in the stand base and mountable between the base frame and cover frame to support the cover member in a tilted position relative to the stand base and movable along the guide track to adjust the tilting angle of the cover member relative to the stand base.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to device stand technology and more particularly, to an adjustable stand holder, which is practical for use to support a mobile electronic device on the top of a table or desk in a tilted position and allows adjustment of the tilting angle of the supported mobile electronic device within a predetermined range of angles 
         [0003]    2. Description of the Related Art 
         [0004]    With fast development of electronic and multimedia information technologies, smart phones, tablet computers, PDAs and many different advanced mobile electronic devices have been created and have appeared on the market. These advances mobile electronic devices have light, thin, short and small characteristics. Further, with the support of high-power software, these advances mobile electronic devices have been intensively used by people of different ages for working, entertainment and many other different purposes. 
         [0005]    When using a mobile electronic device, the user may directly hold the mobile electronic device in hand. However, because a mobile electronic device has a certain weight, holding it in hand for a long period time can cause stiffness and pain in the hand (such as carpal tunnel syndrome), back pain, or spine injury. To avoid this problem, stand holders are created for use to support a mobile electronic device on the top of a table or desk. 
         [0006]      FIG. 8  illustrates a stand holder according to the prior art. According to this design, the stand holder comprises a base panel A, a smoothly arched stop flange A 1  raised from one end of the base panel A, a support block A 2  located at the other end of the base panel A to hold the base panel A in a sloping angle and defining therein an accommodation hole A 21 , and a roller B receivable in the accommodation hole A 21 . The roller B can be taken out of the accommodation hole A 21  and placed on the top side of the base panel A to support a mobile electronic device C on the base panel A against the smoothly arched stop flange A 1  in a tilted position. 
         [0007]    The aforesaid design allows the user to adjust the tilted angle of the supported mobile electronic device C by moving the roller B along the base panel A. However, when the roller B is moved relatively closer to the smoothly arched stop flange A 1 , the roller B will give a relatively larger pressure to the supported mobile electronic device C. Touching the touchscreen of the supported mobile electronic device C at this time will cause stress concentration, damaging the supported mobile electronic device C. Further, because the contact surface area between the roller B and the supported mobile electronic device C is limited, the supported mobile electronic device C may fall from the stand holder to the table or desk, or the floor, causing severe damage. 
       SUMMARY OF THE INVENTION 
       [0008]    The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an adjustable stand holder, which is practical for use to support a mobile electronic device on the top of a table or desk in a tilted position and allows adjustment of the tilting angle of the supported mobile electronic device within a predetermined range of angles. 
         [0009]    To achieve this and other objects of the present invention, an adjustable stand holder comprises a stand base, a cover member and at least one wheel. The stand base comprises a base frame, an axle holder mounted at the base frame in a first direction, and at least one guide track arranged at the base frame in a second direction perpendicular to the first direction. The cover member comprises a cover frame pivotally coupled to the axle holder, and a smoothly curved stop flange raised from a front side of the cover frame for supporting a mobile electronic device on the cover frame. The at least one wheel is receivable in the base frame of the stand base. Further, each wheel can be set between the base frame and cover frame to support the cover member in a tilted position relative to the stand base, and moved along one respective guide track to adjust the tilting angle of the cover member relative to the stand base. Subject to the length design of the at least one guide track, the cover member can be biased relative to the stand base to define a contained angle within the range of 12˜70° angle. 
         [0010]    Further, each wheel comprises a metal circular wheel body defining a rim around an outer perimeter thereof, and an anti-slip covering mounted around the metal circular wheel body and stopped in place by the rim. The anti-slip covering comprises a locating groove forced into engagement with the rim. Further, the anti-slip covering is preferably made out of flexible rubber, having a toothed pattern formed in the outer wall thereof to enhance friction resistance with the cover member and the stand base. 
         [0011]    Further, the cover member comprises at least one longitudinal locating rib located at the bottom side of the cover frame corresponding to the at least one guide track for guiding movement of each wheel stably along each respective guide track, avoiding vibration. 
         [0012]    Further, the cover member comprises a bottom recessed hole located at the bottom side of the cover frame for receiving the axle holder of the stand base. Thus, when the cover member is closed on the stand base, the adjustable stand holder is kept in a flat condition, reducing the height and saving storage space. Further, the cover member comprises an opening cut through the cover frame. Further, the stand base comprises an opening cut through the base frame. Subject to the design of the opening of the stand base and the opening of the cover member, the weight and material consumption of the adjustable stand holder can be greatly reduced, convenient for carrying. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]      FIG. 1  is an elevational view of an adjustable stand holder in accordance with the present invention. 
           [0014]      FIG. 2  is an exploded view of the adjustable stand holder in accordance with the present invention. 
           [0015]      FIG. 3  corresponds to  FIG. 2  when viewed from another angle. 
           [0016]      FIG. 4  is an elevational view of the present invention, illustrating the wheel set between the high front low back bottom wall of the cover member and the rear end of the sliding groove of one guide track of the stand base. 
           [0017]      FIG. 5  corresponds to  FIG. 4 , illustrating the wheel moved to the front end of the sliding groove of the guide track of the stand base. 
           [0018]      FIG. 6  is a schematic sectional side view of  FIG. 5 . 
           [0019]      FIG. 7  is an applied view of the present invention. 
           [0020]      FIG. 8  illustrates an application example of a stand holder according to the prior art. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0021]    Referring to  FIGS. 1-3 , an adjustable stand holder in accordance with the present invention is shown. The adjustable stand holder comprises a stand base  1 , a cover member  2 , and at least one wheel  3 . 
         [0022]    The stand base  1  comprises a base frame  11  defining a high front low back top wall  111 , an opening  110  cut through the base frame  11  and surrounded by the high front low back top wall  111 , an accommodation chamber  14  formed in the high front low back top wall  111  in a middle rear position relative to and in communication with the opening  110 , an axle holder  12  transversely mounted at the high front low back top wall  111  in a middle front position relative to the opening  110  and opposite to the accommodation chamber  14  and defining therein an axial hole  120 , a rotary axle  121  inserted through the axial hole  120  of the axle holder  12  and defining a locating notch  122  on the periphery of each of two opposite ends thereof, at least one, for example, two guide tracks  13  formed in the high front low back top wall  111  at two opposite lateral sides of the opening  110  in a parallel manner, and a plurality of cushion pads  15  mounted in corners of the bottom side of the base frame  11 . Further, each guide track  13  defines a sliding groove  130 , two smoothly arched bearing surfaces  131  respectively located at opposing front and rear ends of the sliding groove  130 , and a positioning groove  132  formed in the smoothly arched bearing surface  131  at the front end of the sliding groove  130 . 
         [0023]    The cover member  2  comprises a cover frame  21  defining a high front low back bottom wall  211 , an opening  210  cut through the cover frame  21  and surrounded by the high front low back bottom wall  211 , a smoothly curved stop flange  22  raised from the top surface of the cover frame  21  at a front side relative to the opening  210 , a bottom recessed hole  23  located at the high front low back bottom wall  211  of the cover frame  21  corresponding to the smoothly curved stop flange  22 , two axle holes  231  formed in the cover frame  21  at two opposite lateral sides of the bottom recessed hole  23  and aligned in line, two stop blocks  232  bilaterally disposed in the bottom recessed hole  23  and spaced below the axle holes  231 , and at least one, for example, two longitudinal locating ribs  24  protruded from the high front low back bottom wall  211  and extending in a parallel manner at two opposite lateral sides relative to the opening  210 . 
         [0024]    The wheel  3  comprises a metal circular wheel body  31  defining a rim  311  around an outer perimeter thereof, and an anti-slip covering  32  mounted around the metal circular wheel body  31  and stopped in place by the rim  311 . Further, the anti-slip covering  32  defines a locating groove  321  that is forced into engagement with the rim  311 . The anti-slip covering  32  can be made out of flexible rubber, having a toothed pattern formed in the outer wall thereof. 
         [0025]    When assembling the adjustable stand holder, pivotally connect the cover frame  21  of the cover member  2  to the axle holder  12  of the stand base  1  by: moving the axle holder  12  of the stand base  1  into the bottom recessed hole  23  of the cover member  2  and then coupling the two opposite ends of the rotary axle  121  of the stand base  1  to the axle holes  231  of the cover member  2 . At this time, the cover member  2  can be biased relative to the stand base  1  to a limited angle where the locating notches  122  of the axle holder  12  of the stand base  1  are respectively abutted against the stop blocks  232  of the cover member  2 . Further, when biasing the cover member  2  relative to the stand base  1 , an open space  20  will be defined between the stand base  1  and the cover member  2 . Further, when the adjustable stand holder is not in use, the wheel  3  can be received in the accommodation chamber  14  in the stand base  1 . Further, the accommodation chamber  14  can have a circular or semi-circular profile fitting the configuration of the wheel  3 . Further, when the cover member  2  is closed on the stand base  1 , the high front low back bottom wall  211  of the cover frame  21  and the high front low back top wall  111  of the base frame  11  are abutted against each other, and therefore the adjustable stand holder is kept in a flat condition, reducing the height and saving storage space. Subject to the design of the opening  110  of the stand base  1  and the opening  210  of the cover member  2 , the weight and material consumption of the adjustable stand holder can be greatly reduced, convenient for carrying. 
         [0026]    Referring to  FIGS. 4-7 , when using the adjustable stand holder, the adjustable stand holder can be placed on the top of a table or desk, keeping the cushion pads  15  in positive contact with the surface of the top of the table or desk. At this time, a mobile electronic device  4  (such as tablet computer, smart phone, PDA, multimedia player, etc.) can be supported on the cover frame  21  and smoothly curved stop flange  22  of the cover member  2 . 
         [0027]    When going to adjust the angular position of the adjustable stand holder, lift the rear side of the cover member  2  to turn the cover member  2  about the axle holder  12  of the stand base  1 , and then take the wheel  3  out of the accommodation chamber  14 , and then insert the wheel  13  into the sliding groove  130  of one guide track  13  and move the wheel  13  to the positioning groove  132  at the front end of the sliding groove  130 , and then lower the cover member  2  to let the high front low back bottom wall  211  of the cover frame  21  be supported on the wheel  3 . At this time, the wheel  3  supports the cover member  2  and the mobile electronic device  4  on the stand base  1  in a tilted position. By means of moving the wheel  3  in the sliding groove  130  of the respective guide track  13 , the tilting angle of the cover member  2  and the mobile electronic device  4  is relatively adjusted. Further, the wheel  3  can be moved between the front and rear ends of the sliding groove  130  of the respective guide track  13  to adjust the tilting angle of the cover member  2  and the mobile electronic device  4  (the contained angle between stand base  1  and the cover member  2 ) within 12˜70° angle. By means of adjusting the tilting angle of the cover member  2  and the mobile electronic device  4  subject to user&#39;s preference, the user can touch the touchscreen of the mobile electronic device  4  comfortably. 
         [0028]    Further, when adjusting the tilting angle of the cover member  2 , the high front low back bottom wall  211  of the cover frame  21  of the cover member  2  is kept in friction engagement with the anti-slip covering  32  of the wheel  3 , avoiding slipping. Further, the rim  311  of the metal circular wheel body  31  of the wheel  3  is kept abutted against one longitudinal locating rib  24  of the cover member  2 , enhancing positioning stability and avoiding vibration. 
         [0029]    Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.