Abstract:
A positioning stand is provided, which comprises: a support; a positioning base, engaged to the support and having an accommodating base at a lateral side thereof; a locking rod, disposed passing through the positioning base and the support and having a locking part in contact with the accommodating base; a knob, connected to an end portion of the locking rod protruding from the support; and a resilient element, disposed between the support and the knob; wherein the knob is capable of changing a position of the locking part through compression of the resilient element and a rotation motion and the support compresses the resilient element to adjust an angle of the support, and the positioning stand is combined with an electronic apparatus, so as to adjust a tilting angle of the electronic apparatus, thus enhancing a cooling effect of the electronic apparatus and increasing comforts of using the electronic apparatus.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of Invention 
         [0002]    The present invention relates to a stand, and more particularly to a positioning stand having multiple positioning angles to adjust a tilting angle of an electronic apparatus and an electronic apparatus having the same. 
         [0003]    2. Related Art 
         [0004]    Portable electronic apparatuses, such as notebook computers and mobile phones, have been widely used in people&#39;s daily life with the improvement of technology. Taking the notebook computer as an example, as shown in  FIG. 1 , currently a notebook computer  1  usually lies flat on a desktop  10  during use. The notebook computer  1  basically includes a screen  11  and a main unit body  12 . When the notebook computer  1  lies flat on the desktop  10 , the main unit body  12  of the notebook computer  1  directly contacts with the desktop  10  and also a keyboard  13  of the notebook computer  1  is directly disposed on the main unit body  12 , so that the keyboard  13  is also in a flat state without any tilting angle, therefore, it is very inconvenient for a user to operate the keyboard  13 . 
         [0005]    In addition, in the conventional notebook computer, as the main unit body is directly placed on the desktop, only lateral sides can be used as cooling space. As a lot of expansion connection interfaces, such as an RGB terminal interface, a USB interface, a memory card reading interface, and a network interface, have to be disposed on the lateral sides, available cooling space becomes smaller. In spite of assistance with a cooling fan, an overheating problem usually occurs due to different space configurations and use environments. 
         [0006]    For the above problems, currently additional support frame fittings can provide a better operation state for a user, which keeps a tilting angle for the main unit body of the notebook computer. Additional fans are usually disposed on the support fittings to enhance the cooling effect of the main unit body. However, the additional fittings are separated from the notebook computer and occupy a considerable volume in both use and accommodated states. Thus, it is inconvenient to carry the additional fittings and the notebook computer together, so that the practicability of the cooling fittings is decreased and limited. 
         [0007]    In order to solve the above problems, in the prior art, for example, an elevating support is disclosed in ROC Utility Patent Publication M347606. In use, the elevating support can be used to elevating an end of the notebook computer, so that the notebook computer tilts with an angle. This technique adjusts an angle of the notebook computer, however, as the elevating support is formed of a plurality of connecting rods, the number of elements is large and angle positioning is very inconvenient. Also, the elevating support is unable to be accommodated when it is not used, resulting in that a tail portion of the notebook computer protrudes from the elevating support, which increases the inconvenience in space. 
       SUMMARY OF THE INVENTION 
       [0008]    The present invention is directed to a positioning stand and an electronic apparatus having the same, which have a multi-angle adjustment mechanism to change a tilting angle of an electronic apparatus, so that a user can make multi-angle adjustment when the user uses the electronic apparatus and thus comfort of operation by the user is improved. 
         [0009]    The present invention is directed to a positioning stand and an electronic apparatus having the same, which use a multi-angle adjustment mechanism in combination with a current electronic apparatus having a projection function to adjust a projection angle dynamically as desired, so that the user can freely adjust a projection view angle to an optimal visual situation. 
         [0010]    The present invention is directed to a positioning stand and an electronic apparatus having the same, which utilizes a multi-angle adjustment mechanism to change a tilting angle of an electronic apparatus, so as to increase air circulation, thus enhancing a cooling effect of the electronic apparatus. 
         [0011]    In an embodiment, the present invention provides a positioning stand, which includes a positioning base, a support, a locking rod, a knob, and a resilient element. The positioning base has a gear type structure at a lateral side and an accommodating base at the other lateral side. The accommodating base has a first through hole passing through the positioning base. The support is engaged to the gear type structure, and has a second through hole corresponding to the first through hole. The locking rod protrudes from the support through the first through hole and the second through hole, and has a locking part in contact with the accommodating base. The knob is connected to an end portion of the locking rod protruding from the support. The resilient element is disposed between the support and the knob, so that the knob changes a position of the locking part through compression of the resilient element and a rotation motion and the support compresses the resilient element to adjust an angle of the support. 
         [0012]    In another embodiment, the present invention further provides an electronic apparatus having positioning stands, which includes an electronic apparatus and a pair of positioning stands. The electronic apparatus has a slot on each sidewall at two sides respectively. The pair of positioning stands is connected on the two sidewalls of the electronic apparatus respectively. Each positioning stand includes a positioning base, a support, a locking rod, a knob, and a resilient element. The positioning base has a gear type structure on a lateral side and an accommodating base on the other lateral side. The accommodating base is accommodated in the slot on a corresponding sidewall, and has a first through hole passing through the positioning base. The support is engaged to the gear type structure, and has a second through hole corresponding to the first through hole. The locking rod protrudes from the support through the first through hole and the second through hole, and has a locking part. The knob is connected on an end portion of the locking rod protruding from the support. The resilient element is disposed between the support and the knob, so that the knob drives the locking part to select to be in contact with the accommodating base or in contact with the corresponding sidewall through compression of the resilient element and a rotation motion, and the support compresses the resilient element to adjust an angle of the support. 
         [0013]    In another embodiment, the present invention further provides an electronic apparatus having positioning stands, which includes an electronic apparatus, a projection unit, and a pair of positioning stands. The electronic apparatus has a slot on each sidewall at two sides respectively. The projection unit is disposed inside the electronic apparatus, for projecting an image. The pair of positioning stands is connected on the two sidewalls of the electronic apparatus respectively, for adjusting a tilting angle of the electronic apparatus, so as to adjust a projection angle of the projection unit. Each positioning stand includes a positioning base, a support, a locking rod, a knob, and a resilient element. The positioning base has a gear type structure on a lateral side and an accommodating base on the other lateral side. The accommodating base is accommodated in the slot on the corresponding sidewall, and has a first through hole passing through the positioning base. The support is engaged to the gear type structure, and has a second through hole corresponding to the first through hole. The locking rod protrudes from the support through the first through hole and the second through hole, and has a locking part. The knob is connected to an end portion of the locking rod protruding from the support. The resilient element is disposed between the support and the knob, so that the knob drives the locking part to select to be in contact with the accommodating base or in contact with the corresponding sidewall through compression of the resilient element and a rotation motion, and the support compresses the resilient element to adjust an angle of the support. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein: 
           [0015]      FIG. 1  is a schematic view of a use state of a conventional electronic apparatus; 
           [0016]      FIG. 2A  is a 3 dimensional schematic exploded view of a positioning stand according to an embodiment of the present invention; 
           [0017]      FIGS. 2B and 2C  are schematic sectional views of a positioning base and a support according to the present invention respectively; 
           [0018]      FIG. 3A  is a schematic exploded view of combination of a positioning stand and an electronic apparatus according to the present invention; 
           [0019]      FIGS. 3B to 3D  are schematic views of motions of a knob of an electronic apparatus according to an embodiment of the present invention; 
           [0020]      FIG. 3E  is a schematic view of combination of a positioning stand and an electronic apparatus; 
           [0021]      FIG. 4  is a schematic view of internal of an electronic apparatus having positioning stands according to the present invention; 
           [0022]      FIGS. 5A and 5B  are schematic views of angle adjustment motions of a support according to the present invention; 
           [0023]      FIG. 5C  is a schematic view illustrating accommodation of a positioning stand according to the present invention; 
           [0024]      FIG. 6  is a schematic view of an electronic apparatus according to another embodiment of the present invention; and 
           [0025]      FIGS. 7A and 7B  are schematic views of a positioning stand according to another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0026]    In order to provide the examiner with further awareness and understanding of the features, objectives, and functions of the present invention, the related detailed structures and design conceptions and reasons of the apparatus of the present invention are illustrated below, so that the examiner can understand the characteristics of the present invention. The detailed illustration is as follows. 
         [0027]    Referring to  FIGS. 2A to 2C ,  FIG. 2A  is a 3D schematic exploded view of a positioning stand according to an embodiment of the present invention.  FIGS. 2B and 2C  are schematic sectional views of a positioning base and a support according to the present invention respectively. The positioning stand  2  includes a positioning base  20 , a support  21 , a locking rod  22 , a knob  23 , and a resilient element  24 . The positioning base  20  has a gear type structure  200  on a lateral side thereof and an accommodating base  201  on the other lateral side. The accommodating base  201  has a first through hole  202  passing through the positioning base  20 . The accommodating base  201  has a pair of grooves  203  and  204  intersecting each other. In this embodiment, an intersection angle is 90 degrees, but the present invention is not limited thereto. The support  21 , engaged to the gear type structure  200 , is extended with a foot part  210 . In this embodiment, a cover  211  is provided at a side of the support  21  corresponding to the positioning base  20 , and has teeth  212  that can be engaged to the gear type structure  200 . The cover  211  is not an essential means, which can be disposed or removed by the user according to the demands. The support  21  has a second through hole  213  corresponding to the first through hole  202 . 
         [0028]    The locking rod  22  protrudes from the support  21  through the first through hole  202  and the second through hole  213 . The locking rod  22  has a locking part  220  and a first rod  221 . The first rod  221  penetrates the positioning base  20  and the support  21  and protrudes from the support  21 , so that the locking part  220  is in contact with the accommodating base  201 . In this embodiment, the locking part  220  is a pair of convex bodies  2201  and  2202 , which contacts with the groove  203  when the first rod  221  penetrates the positioning base  20  and the support  21  through the first through hole  202  and the second through hole  213 . The knob  23  is connected to an end portion of the locking rod  22  protruding from the support  21  through a through hole  230 . Connection between the knob  23  and the locking rod  22  is fixed, so that the knob  23  can drive the locking rod  23  to rotate synchronously. The resilient element  24  is disposed between the support  21  and the knob  23 . In this embodiment, the resilient element  24  is provided for the locking rod  22  to pass through so that the resilient element  24  is disposed between the support  21  and the knob  23 . The knob  23  further has a convex ring  231 . When the convex ring  231  is combined with the resilient element  24 , an outer edge of the convex ring  231  is in contact with an inner wall at an end of the resilient element  24 , so as to provide an end for positioning the resilient element  24 . The support  21  further has a groove  214  to provide the other end for accommodating the resilient element  24 . 
         [0029]      FIG. 3A  is a schematic view of combination of a positioning stand and an electronic apparatus according to the present invention. In  FIG. 3A , two sidewalls  30  (only one sidewall is shown in  FIG. 3A ) of the electronic apparatus  3  each have a slot  300 . The electronic apparatus  3  in this embodiment is a notebook computer, but the present invention is not limited thereto. A positioning stand  2  can be accommodated in each slot  300 . FIGS. 3B to 3D show schematic views of motions of a knob of the electronic apparatus according to an embodiment.  FIG. 3B  shows an initial state after the positioning stand  2  is assembled. The support  21  and the positioning base  20  are engaged to each other. Two convex bodies  2201  and  2202  of the locking part  220  are in contact with the accommodating base  201 . When the accommodating base  201  of the positioning base  20  is inserted in the corresponding slot, the sidewall at outside of the accommodating base  201  is in contact with the sidewall  30  of the electronic apparatus  3 . 
         [0030]    In order to fix the positioning stand  2  on the electronic apparatus  3 , as shown in  FIG. 3C , the user can compress the knob  23 . As the positioning stand  2  uses the sidewall  30  of the electronic apparatus  3  as a constraint, the knob  23  can compress the resilient element  24  so that the locking part  220  disengages from the groove  203  of the accommodating base  201 . At this time, the user can rotate the knob  23  by a certain angle, in this embodiment, 90 degrees. Subsequently, the force is released, so that the resilience of the resilient element  24  works on the knob  23  and the locking part  220  is brought back to be in contact with the groove  204  of the accommodating base  201  (as shown in  FIG. 2A ), so as to form a state as shown in  FIG. 3D . At this time, as the locking part  220  rotates with an angle, the convex bodies  2201  and  2202  of the locking part  220  are blocked by the sidewall  30  of the electronic apparatus so that the positioning stand  2  cannot depart from the electronic apparatus  3 . In order to facilitate the user to rotate the knob so that the locking part can correspond to the groove  203  or  204  accurately, as shown in  FIG. 2A , an alignment mark structure or an alignment mark can be disposed on the knob  23  and the support  21 . In this embodiment, alignment structures  232  and  215  are used to assist the user to recognize rotation positions. 
         [0031]    As shown in  FIG. 3E , after the motion in  FIG. 3D , the positioning stand  2  can be disposed on the electronic apparatus  3  without departing from the electronic apparatus  3 , so that the electronic apparatus  3  disposed with the positioning stands  2  is placed on the desktop  10 . Additionally, the positioning stands can be disassembled by similarly compressing the knob and rotating in an opposite direction, the description of which is omitted here.  FIG. 4  is a schematic view of internal of an electronic apparatus having positioning stands according to the present invention. The electronic apparatus further has a strengthened structure  31  inside. The locking rod  22  of the positioning stand is further extended with a convex rod  222  inside the electronic apparatus. The convex rod  222  is in contact with the strengthened structure  31 . The sidewall  30  of the electronic apparatus and the strengthened structure  31  are utilized to support the positioning stand  2  at the same time, so as to disperse the force on the positioning stand  2  and increase stability of the positioning stands. 
         [0032]      FIGS. 5A and 5B  are schematic views of angle adjustment motions of a support according to the present invention.  FIG. 5A  shows a state in which the positioning stand is disposed on the electronic apparatus. At this time, if a tilting angle of the electronic apparatus needs to be adjusted, the user can apply an outward force on the support, so that the support  21  is released from the engagement state with the positioning base  20 , as shown in  FIG. 5B . At this time, as the support  21  is disengaged from the positioning base  20 , the support  21  compresses the resilient element, so that resilience is accumulated at the resilient element  24 . When the support  21  is disengaged from the positioning base  20 , the user can rotate the support  21  to adjust the support  21  to a specific angle, which is between 0 degree and 180 degrees in this embodiment, so as to change the tilting angle of the electronic apparatus. Additionally,  FIG. 5C  is a schematic view illustrating accommodation of the positioning stand according to the present invention. If the user does not use the positioning stand, the operation in  FIG. 5B  can also be performed, so that the positioning stand  2  is accommodated to a direction consistent with a side of the electronic apparatus  3 , such that the electronic apparatus  3  is accommodated more easily and the occupied space is decreased to the minimum. 
         [0033]      FIG. 6  is a schematic view of an electronic apparatus according to another embodiment of the present invention. In this embodiment, the electronic apparatus  3  further has a projection unit  32  for projecting an image area  320 . An image can be presented in the image area  320 . In order to adjust an angle of projecting the image area  320 , the positioning stand  2  of the present invention is utilized and the tilting angle of the electronic apparatus is changed by rotating the support through the operation in  FIG. 5B , so as to change the projection angle of the projection unit  32 . Therefore, the user can freely adjust a projection view angle to an optimal visual situation. Although in this embodiment the notebook computer is taken as an example for the electronic apparatus, in other embodiments, an electronic apparatus such as a mobile phone or personal digital assistance (PDA) can also be combined with the projection unit, and a projection angle thereof can be adjusted in combination with the positioning stand according to the present invention. 
         [0034]      FIGS. 7A and 7B  are schematic views of a positioning stand according to another embodiment of the present invention. In this embodiment, a flexible belt  25  can be further connected to end portions of positioning stands  2  disposed at two sides of the electronic apparatus  3 . A pair of holes  216  is opened at an end of a foot part  210  of the support  21 . An end of the flexible belt  25  has a buckle  26 , and two ends of the buckle  26  can be inserted in the corresponding holes  216 , so that the buckle  26  can be fixed on the foot part  210  to form a state as shown in  FIG. 7B . Through the configuration of the flexible belt  25 , the user can carry the electronic apparatus  3  with the flexible belt  25 , thus providing a further implementation of carrying the electronic apparatus  3 . 
         [0035]    The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.