Abstract:
A modular case handle positioning device including:
       the handles are able to angular rotate about the respective shaft pins as axis, and a force is applied to protruding portions of slots on two sides when the handles are rotated through an angle, thereby enabling the modular case to be withdrawn from the slots using a first stage displacement action. In order to prevent the entire modular case from falling to the ground because of an overexertion of force when the modular case is being inserted into the slots, the present invention includes a second stage displacement action that acts as a force buffer and final directional displacement control, thereby enabling the modular case to be solidly positioned within the slots.

Description:
BACKGROUND OF THE INVENTION 
   (a) Field of the Invention 
   The present invention relates to a modular case handle positioning device that uses rotational displacement of handles to control the moment of force and displacement direction of a modular case when being inserted into or withdrawn from an outer case slot, thereby preventing the modular case from falling to the ground when withdrawing from the slot and increasing position fixing accuracy and stability when inserting into the slot. 
   (b) Description of the Prior Art 
   The range of functions of computers is increasing with each passing day, for instance, various new functional devices are continually being developed in the area of industrial computers, such as remote controls, supervisory systems, loading of working data, updating, and so on, which all need the installation of new hardware, and the outer cases of these hardware components are all modularized as rectangular cases. However, these rectangular cases have a plurality of different sizes, and when the modular case is inserted into or withdrawn from holding slots, the modular case often falls to the ground because of an overexertion in the initial application of force by an operator (such as a pulling force) or overexertion of pressure when inserting the modular case into the holding slots results in an excessive vibration force between the modular case and the holding slots, finally resulting in an extremely large vigorous force being needed to re-withdraw the modular case from the tight fitting formed in the holding slots. The shortcomings of prior art are as described above. 
   Furthermore, screw connection methods are generally used to fix position of the modular case within the holding slots, which are extremely inconvenient to assemble and disassemble. 
   SUMMARY OF THE INVENTION 
   The primary objective of the present invention is to provide a modular case handle positioning device that uses angular rotation of handles to apply a force to protruding portions of slots on two sides, thereby enabling a modular case to be withdrawn from the slots using a first stage displacement action. In order to prevent the entire modular case from falling to the ground because of an overexertion of force when the modular case is being inserted into the slots, the present invention includes a second stage displacement action that acts as a force buffer and final directional displacement control, thereby enabling the modular case to be solidly positioned within the slots. 
   To enable a further understanding of said objectives and the technological methods of the invention herein, brief description of the drawings is provided below followed by detailed description of the preferred embodiments. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  shows an exploded elevational view of a modular case and handles according to the present invention. 
       FIG. 2  shows an assembled elevational view of the modular case and handles according to the present invention. 
       FIG. 3  shows an exploded view depicting components of the handle according to the present invention. 
       FIG. 4  shows a partial side view depicting the handle folded back and locked onto the modular case according to the present invention. 
       FIG. 5  shows a partial side view depicting the handle opening from the modular case according to the present invention. 
       FIG. 6  shows a partial side view depicting the handle further opened from the modular case according to the present invention. 
       FIG. 7  shows a partial cross-sectional schematic view depicting the modular case assembled in slots of a host outer case according to the present invention. 
       FIG. 8  shows a partial cross-sectional schematic view depicting the modular case being withdrawn from the slots of the host outer case according to the present invention. 
       FIG. 9  shows an assembled elevational view depicting a plurality of the modular cases being assembled into the slots of the host outer case according to the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring to  FIGS. 1 ,  2 ,  3  and  4 , the present invention provides the modular case handle positioning device, which comprises: 
   a rectangular modular case  10 , wherein undersides of a front surface  12  is defined with depressed indentations  14 , ( 14 ), each of which are provided with an inner groove surface  141 , and an underside of the front face is defined with position fixing holes  13 ; 
   at least more than one handle  20 , ( 20 ) is movable connected to a lower surface of two sides of the modular case  10 , and each of the handles  20 , ( 20 ) are structured to comprise: 
   a platelike main body  22  (see  FIG. 3 ), wherein an upper cover  24  is affixed to an upper surface of a front plate  221 , and a lower cover  26  is affixed to a lower surface, moreover, a front pivot joint hole  222  is defined in the front plate  221 , and a rear pivot joint hole  223  is defined in a rear side of the main body  22 ; a side edge of the front plate  221  forms an L-shaped side  224 ; 
   an L-shaped linkage  25 , a horizontal side of which forms a holding slot  251 , a side end forms a hook  252 , and a longitudinal through hole  253  is defined in the L-shaped linkage  25 ; the holding slot  251  fits into the L-shaped side  224 , and a shaft pin  255  is inserted into the longitudinal through hole  253  and the front pivot joint hole  222  of the main body  22 ; the L-shaped linkage  25  is able to angular swing on the front plate  221  around the shaft pin  255  as axis; 
   the shaft pin  27  passes through the rear pivot joint hole  223  and into the inner groove surface of the indentation  14 , and angular displacement of the handle  20  is made around the shaft pin  27  as axis, and the hook  252  clasps onto or separates from the position fixing hole  13 . 
   Referring to  FIGS. 3 ,  4  and  5 , wherein sides of the upper cover  24  and the lower cover  26  form L-shaped sides  241  and  261  respectively. The two L-shaped sides  241 ,  261  correspond to a side of the L-shaped linkage  25 , and an L-shaped clearance  28  is formed between the L-shaped sides  241 ,  261  and the L-shaped linkage  25 . 
   Referring again to  FIG. 4 , wherein a surface of an inner wall  131  of the position fixing hole  13  enables the hook  252  to clasp thereon. 
   Referring to  FIGS. 7 and 8 , wherein the rectangular modular case  10  is inserted into the slots  32  defined in an outer case  30 , and protruding portions  321  are formed on slot ends of the slots  32  on two sides. 
   A protrusion  225  is formed at a rear end of the main body  22  of the handle  20 , a side of the protrusion  225  forms an indentation  226  (see  FIG. 3 ), a side of which forms an inclined surface  227 . The protrusion  225  clasps onto or separates from an inner wall surface  3211  of each of the protruding portions  321 , and the inclined surface  227  clasps onto or separates from an outer wall surface  3212  of each of the protruding portion  321  (see  FIG. 8 ). 
   Referring to  FIG. 1 , which shows a preferred embodiment of the present invention comprising two handles  20  connected to a modular case  10 . A rear end of a main body  22  of each of the handles  20  is movable connected to an inner groove surface  141  within an indentation  14  ( 14 ). The handles  20  are configured for rotational displacement through a certain angle in a positive or negative direction around a shaft pin  27  as axis. 
   Referring to  FIG. 2 , which shows a three-dimensional view of the present invention depicting the two handles  20  folded back and clamped to the modular case  10 . 
   Referring to  FIG. 4 , which shows the two handles  20  locked onto the modular case  10 , wherein a hook  252  of each handle clasps onto the surface of an inner wall  131  of a position fixing hole  13 . 
     FIG. 5  shows a view of the handles  20  in the initial stages of being opened whereby an operator presses a linkage  25  of each of the handles  20  with his fingers to cause it to rotate through an angle around the shaft pin  255  as axis. Rotational displacement of the linkage  25  closes an outer open end of a clearance  28 , thereby forming a angular displaced top dead point and simultaneously causing rotationally displacement of the hook  252 , which results in the hook  252  separating from the inner wall  131  and being positioned within the position fixing hole  13 . The operator holds the linkages  25  and an upper and a lower cover  24 ,  26  of each of the handles  20  and outwardly pulls on them as a single entity with his fingers. 
   The upper and lower covers  24 ,  26  are fabricated from non-metallic light material that facilitates convenient holding and handling by the operator. Rotationally displacement of the entire handle  20  around the shaft pin  27  as axis displaces the hook  252  from the position fixing hole  13 .  FIG. 6  shows the entire handle  20  rotated through a certain angle in a clockwise direction, and  FIG. 7  shows the modular case  10  inserted and clamped within slots  32  of a host outer case  30 , wherein the handles  20  are in a folded back and closed state. A protrusion  225  of a tail end of each of the handles  20  clasps and fixes position on an inner wall surface  3211  of a protruding portion  321  of the outer case  30 . Referring to  FIG. 8 , which shows the handles  20  in an open state, as depicted in  FIG. 6 , wherein an inclined surface  227  of each of the handles  20  presses against and produces a slight frictional slide displacement on an outer wall surface  3212 . At which time a displacement effect of the modular case  10  is achieved, that is, the inclined surfaces  227  pressing on the outer wall surfaces  3212  form points of force application, and the handles  20  form force applicator arms that enable the modular case  10  to be displaced a certain distance out of the slots  32 . The operator only needs to rotate the handles  20  through a certain angle to effortlessly linearly guide the modular case  10  a certain distance out of the slots  32 . This action is defined as the first stage whereby the operator initially withdraws the modular case  10  from the slots  32 . The second stage involves the operator grasping the modular case  10  protruding from the slots  32  in conjunction with grasping the handles  20  to enable the modular case  10  to be firmly withdrawn from the slots  32  without the worry of the modular case  10  falling to the ground because of excessive force applied by the operator during the course of withdrawing it from the slots  32 . 
   Furthermore, when the operator wants to assemble the modular case  10  into the slots  32 , the first stage involves first inserting the tail portion of the modular case  10  into the slots  32 . When more than two thirds of the modular case  10  has been inserted into the slots  32 , and when each of the inclined surfaces  227  press against the respective outer wall surface  3212 , the first stage is thus completed. The second stage involves the operator holding the handles  20  and rotating then in a reverse direction (see  FIG. 8 ), thereby causing the protrusions  225  to press against the respective inner wall surfaces  3211  forming points of force application, and the handles  20  form force applicator arms that enable smooth completion of the second stage whereby the modular case  10  is accurately clamped within the slots  32  in a linear direction by effort saving means. Furthermore, each of the hooks  252  clasp onto the respective surface of the inner wall  131  of the position fixing hole  13 , as depicted in  FIG. 4 . 
   Referring to  FIG. 9 , which shows a plurality of the modular cases  10 , ( 10 ) separately installed into the slots  32 . The outer case  30  is an industrial computer host case, and the modular cases  10  are server cases that can be extracted from or disposed into the slots  32  according to the aforementioned procedural stages, which increases safety of withdrawing the modular cases  10  from the slots  32  and improves direction and accuracy of position fixing when inserting the modular cases  10  into the slots  32 . 
   In conclusion, the present invention in overcoming structural shortcomings of prior art has assuredly achieved effectiveness of anticipated advancement, and practicability and advancement of the present invention clearly comply with essential elements as required for a new patent application. Accordingly, a new patent application is proposed herein. 
   It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.