Patent Publication Number: US-11648658-B2

Title: Screwdriver structure

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a hand tool and, more particularly, to a screwdriver structure. 
     2. Description of the Related Art 
     A conventional screwdriver structure was disclosed in the European Patent No. 2 698 231 or Taiwanese Patent Publication No. 1532570, and comprises a handle, and a cover  18 . 
     However, the conventional screwdriver structure has the following disadvantages. 
     1. The cover  18  is provided with a slide valve  28 . When the user wishes to remove the cover  18  from the handle, the slide valve  28  is moved to compress the compression spring  42  so as to detach the stop hook  30  from the stop flange  26  so that the cover  18  is unlocked and can be released from the handle. Thus, the slide valve  28  is moved to lock or unlock the cover  18 . However, the user has to move the slide valve  28  to open or fold the cover  18 , thereby causing inconvenience to the user and wasting the time and manual labor. 
     2. The handle and the cover  18  have a smaller volume, thereby limiting the operation space of the slide valve  28 , and thereby limiting the contact area of the slide valve  28  with the user&#39;s hand. 
     3. The stop hook  30  and the stop flange  26  have to withstand the elastic force of the compression spring  42 . However, the stop hook  30  and the stop flange  26  are locked by a single side so that the stop hook  30  cannot withstand a large force. 
     4. The user has to hold the handle by one hand and to move the slide valve  28  by the other hand. However, the slide valve  28  has a smaller volume and has a limited operation space, so that the user cannot clearly see the right position of the slide valve  28 , thereby failing the operation. 
     BRIEF SUMMARY OF THE INVENTION 
     In accordance with the present invention, there is provided a screwdriver structure comprising a main body, a switch set assembled with the main body, and a press set assembled with the main body and the switch set. The main body is provided with a drive portion, a first chamber, a second chamber, a resting edge, and at least one first slide. The switch set includes two first clamping portions. When the switch set is pressed, the two first clamping portions are moved toward each other or moved away from each other. The press set is pressed and moved in the first chamber to push the switch set, so that the two first clamping portions are moved to clamp and lock the press set. When the press set is pressed again, the two first clamping portions are moved to release the press set. 
     According to the primary advantage of the present invention, the press set is assembled with the main body and the switch set and is movable in the first chamber. When the press set is pressed, the press set is moved to push the switch set so that the press set is locked by the two first clamping portions and positioned in the first chamber without detachment. When the press set is pressed again, the press set is unlocked from the two first clamping portions so that the press set is moved and exposed from the main body. Thus, the user only needs to press the press set reciprocatingly to fold the press set onto the main body or expose the press set from the main body, thereby facilitating the user operating the screwdriver structure. 
     Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         FIG.  1    is a partial exploded perspective view of a screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  2    is a perspective cross-sectional view of a main body of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  3    is an exploded perspective view of a switch set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  4    is a side view of a second seat of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  5    is a cross-sectional view of the second seat of the screwdriver structure taken along line A-A as shown in  FIG.  4   . 
         FIG.  6    is a front view showing a first operation state of the switch set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  7    is a front view showing a second operation state of the switch set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  8    is a front view showing a third operation state of the switch set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  9    is a side view showing the third operation state of the switch set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  10    is a cross-sectional view of the switch set of the screwdriver structure taken along line C-C as shown in  FIG.  9   . 
         FIG.  11    is an exploded perspective view of a press set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  12    is a perspective cross-sectional view of a third seat of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  13    is a side view of the press set of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  14    is a cross-sectional view of the press set of the screwdriver structure taken along line D-D as shown in  FIG.  13   . 
         FIG.  15    is a perspective view of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
         FIG.  16    is a side view of the screwdriver structure as shown in  FIG.  15   . 
         FIG.  17    is a cross-sectional view of the screwdriver structure taken along line E-E as shown in  FIG.  16   . 
         FIG.  18    is a cross-sectional view showing operation of the screwdriver structure taken along line E-E as shown in  FIG.  16   . 
         FIG.  19    is a locally enlarged view of the screwdriver structure taken along circle F as shown in  FIG.  18   . 
         FIG.  20    is another perspective view of the screwdriver structure in accordance with the preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the drawings and initially to  FIGS.  1 - 14   , a screwdriver structure in accordance with the preferred embodiment of the present invention comprises a main body  10 , a switch (or locking) set  20  assembled with the main body  10 , and a press (or push) set  30  assembled with the main body  10  and the switch set  20 . 
     The main body  10  has a first end provided with a drive portion  11  and a second end provided with a handle (or grip). The handle has an interior provided with a first chamber  12  and a second chamber  13 . The first chamber  12  is distant from the drive portion  11  and has an opening extending to an end portion of the handle. The second chamber  13  is connected to the first chamber  12  and arranged between the drive portion  11  and the first chamber  12 . The second chamber  13  has a diameter less than that of the first chamber  12 , and a resting edge  14  is formed between the first chamber  12  and the second chamber  13 . The main body  10  is provided with at least one first slide  15 . The at least one first slide  15  has an end portion provided with a first limit portion  16  close to the opening of the first chamber  12 . 
     The switch set  20  is mounted in the first chamber  12  and the second chamber  13 . The switch set  20  includes a first seat  21  secured in the second chamber  13 , a second seat  22  secured in the first receiving recess  211 , a clamping block  23  mounted in the second receiving recess  221 , a control member  24  assembled with the second seat  22  and the clamping block  23 , and a first elastic member  25  elastically biased between the second seat  22  and the clamping block  23  to provide a restoring effect to the clamping block  23 . 
     The first seat  21  has an interior provided with a first receiving recess  211 . 
     The second seat  22  has an interior provided with a second receiving recess  221  and has a side provided with a slideway  222  connected to the second receiving recess  221 . The slideway  222  includes a first path  2221 , a second path  2222 , a third path  2223 , a locking portion  2224 , a fourth path  2225 , and a fifth path  2226 . The first path  2221 , the second path  2222 , the third path  2223 , the locking portion  2224 , the fourth path  2225 , and the fifth path  2226  construct a loop or circuit or closed route. The second seat  22  is provided with two first abutting portions  223  close to an opening of the second receiving recess  221 . The second receiving recess  221  has a bottom provided with a first shaft  224  (see  FIG.  4   ). 
     The clamping block  23  has a first end provided with two first clamping portions  231  and a second end provided with a first receiving slot  232 . The two first clamping portions  231  align with each other. The clamping block  23  is movable in the second receiving recess  221  between a first location where the two first clamping portions  231  are pressed by the two first abutting portions  223  and approach each other, and a second location where the two first clamping portions  231  are released from the two first abutting portions  223 , are spaced from each other, and are exposed from the second receiving recess  221 . The first receiving slot  232  aligns with the first shaft  224  and has an opening distant from the two first clamping portions  231 . The clamping block  23  is provided with a third receiving recess  233  penetrating the clamping block  23 . The third receiving recess  233  is connected to the first receiving slot  232  and is arranged between the two first clamping portions  231  and the first receiving slot  232 . The third receiving recess  233  is provided with a second abutting portion  234 . 
     In practice, when the switch set  20  is pressed, the two first clamping portions  231  are moved toward each other, and when the switch set  20  is pressed again, the two first clamping portions  231  are moved away from each other. That is, when the switch set  20  is pressed, the two first clamping portions  231  are moved toward each other or moved away from each other. 
     The control member  24  is provided with a second shaft  241  extending through the third receiving recess  233 . The second shaft  241  is provided with a third abutting portion  242 . The second shaft  241  is movable between a first location where the third abutting portion  242  rests on the second abutting portion  234  and a second location where the third abutting portion  242  is detached from the second abutting portion  234 . The control member  24  is provided with a moving portion  243  received in the slideway  222 . 
     When the clamping block  23  is pressed and moved in the second receiving recess  221 , the moving portion  243  is moved in the slideway  222 , so that the second shaft  241  is driven by the clamping block  23  and rotated in the third receiving recess  233 . The clamping block  23  is movable relative to the second seat  22  between a first (or unlocked) position where the moving portion  243  is located at the first path  2221  and a second (or locked) position where the moving portion  243  is locked on the locking portion  2224 . 
     In such a manner, when the second shaft  241  is driven by the clamping block  23  and rotated in the third receiving recess  233 , the moving portion  243  is moved in the slideway  222 , unlocked from the locking portion  2224 , and located at the first path  2221 , such that the clamping block  23  is situated at the first position where the third abutting portion  242  rests on the second abutting portion  234 . 
     Alternatively, when the second shaft  241  is further driven by the clamping block  23  and rotated in the third receiving recess  233 , the moving portion  243  is moved in the slideway  222  and locked in the locking portion  2224 , such that the clamping block  23  is situated at the second position where the third abutting portion  242  is detached from the second abutting portion  234 . 
     Thus, when the clamping block  23  is pressed repeatedly, the clamping block  23  is movable between the first position and the second position reciprocatingly. At this time, the two first clamping portions  231  are away from each other when the clamping block  23  is at the first position as shown in  FIG.  6    and are moved toward each other when the clamping block  23  is at the second position as shown in  FIG.  8   . 
     The first elastic member  25  is disposed between the second receiving recess  221  and the first receiving slot  232 . The first elastic member  25  is mounted on the first shaft  224  and is biased between a bottom of the second receiving recess  221  and the second shaft  241 . 
     In practice, the first elastic member  25  is biased between the second seat  22  and the clamping block  23 , such that the two first clamping portions  231  are spaced from each other and exposed from the second receiving recess  221 . The third abutting portion  242  rests on the second abutting portion  234  by an elastic force of the first elastic member  25 , such that the moving portion  243  is located at the first path  2221 , and the clamping block  23  is situated at the first position relative to the second seat  22  as shown in  FIG.  6   . 
     When the clamping block  23  is pressed and moved in the second receiving recess  221 , the two first clamping portions  231  are pressed by the two first abutting portions  223  such that the two first clamping portions  231  are moved toward each other and retracted in the second receiving recess  221  as shown in 
       FIG.  7   . When the control member  24  is driven and moved by the clamping block  23 , the second shaft  241  is rotated in the third receiving recess  233 , and the third abutting portion  242  is detached from the second abutting portion  234 , so that the moving portion  243  is serially moved along the first path  2221  and the second path  2222 , and the first elastic member  25  is compressed by the control member  24  and the clamping block  23 . 
     When the moving portion  243  is further moved along the third path  2223  to the locking portion  2224 , the moving portion  243  is locked on the locking portion  2224 , the switch set  20  is disposed at a locked state, the first elastic member  25  is slightly returned, and the control member  24  and the clamping block  23  are pushed slightly by the first elastic member  25  and moved toward the opening of the second receiving recess  221 , such that the two first clamping portions  231  are moved to partially protrude from the second receiving recess  221  and are moved toward each other, and the clamping block  23  is situated at the second position relative to the second seat  22  as shown in  FIG.  8   . 
     When the clamping block  23  is pressed again, the moving portion  243  is unlocked from the locking portion  2224 , and the clamping block  23  is pushed by the first elastic member  25 , such that the moving portion  243  is serially moved along the fourth path  2225  and the fifth path  2226  to the first path  2221 , and the clamping block  23  is returned to the first position as shown in  FIG.  6   . 
     The press set  30  is pressed and moved in the first chamber  12  to push the switch set  20 , so that the two first clamping portions  231  are moved to clamp the press set  30 , and the press set  30  is positioned in and cannot be removed from the first chamber  12 . When the press set  30  is pressed again, the two first clamping portions  231  are moved to release the press set  30 , such that the press set  30  is movable toward the opening of the first chamber  12 . 
     The press set  30  includes a tube  31 , a third seat  32 , a pin  33 , a snap ring  34 , a rod (or pole)  35 , a second elastic member  36 , a tip set  37 , a cover  38 , and a push (or press) member  39 . 
     The tube  31  is provided with a passage  311  penetrating the tube  31 . 
     The third seat  32  is movably mounted in the first chamber  12 . The third seat  32  is fitted with the tube  31  so that the tube  31  and the third seat  32  are moved simultaneously. Thus, when the third seat  32  is moved in the first chamber  12 , the tube  31  is moved with the third seat  32  so that the tube  31  is hidden in the first chamber  12  or protrudes from the main body  10 . The third seat  32  has a first end provided with a coupling (or connecting or combining) portion  321  fitted on the tube  31  so that the tube  31  and the third seat  32  are combined. The coupling portion  321  is located at a center of the third seat  32  and has an opening aligning with the opening of the first chamber  12 . The coupling portion  321  has a bottom provided with a first resting face  322  abutting the tube  31 . The third seat  32  has a second end provided with a second resting face  323  and a second receiving slot  324 . The second resting face  323  aligns with the two first clamping portions  231  and is arranged in the second receiving slot  324 . The second receiving slot  324  has an opening facing the second chamber  13 . The third seat  32  has an exterior provided with at least one second slide  325  slidably connected with the at least one first slide  15  so that the third seat  32  is slidable linearly in the first chamber  12 . The at least one second slide  325  is provided with a second limit portion  326  that is movable to abut the first limit portion  16  so that the second limit portion  326  is restricted by the first limit portion  16 , to prevent the third seat  32  from being detached from the first chamber  12 . 
     The pin  33  passes the passage  311  and the coupling portion  321 . The pin  33  has a first end provided with a second clamping portion  331  protruding from the third seat  32 . The second clamping portion  331  aligns with the switch set  20  and presses the clamping block  23 . The second clamping portion  331  engages the two first clamping portions  231 . When the clamping block  23  is situated at the second position, the second clamping portion  331  is clamped with the two first clamping portions  231  so that the switch set  20  is disposed at the locked state. The pin  33  is provided with a retaining groove  332  protruding from the coupling portion  321 . 
     The snap ring  34  is retained in the retaining groove  332 . 
     The rod  35  is movably mounted in the passage  311 . The rod  35  has a recessed first end fitted with a second end of the pin  33  and a second end protruding from the tube  31 . The rod  35  drives and moves the pin  33  when the rod  35  is moved relative to the tube  31 . 
     The second elastic member  36  is received in the passage  311  and mounted on the pin  33 . The second elastic member  36  is elastically biased between the first resting face  322  and the first end of the rod  35 . 
     The tip set  37  is mounted on the tube  31 . The tip set  37  is moved with the tube  31  synchronously so that the tip set  37  is hidden in the first chamber  12  or protrudes from the main body  10 . 
     The cover  38  is fitted with the tube  31  and covers the opening of the first chamber  12  so that the first chamber  12  is disposed at a closed state. The cover  38  is spaced from the third seat  32  and provided with a receiving space  381  allowing passage of the rod  35 . 
     The push member  39  is fitted on the second end of the rod  35  and housed in the receiving space  381 . The push member  39  is movable in the receiving space  381  through a determined distance. When the push member  39  is pushed or pressed, the rod  35  and the pin  33  are driven by the push member  39  and moved in the passage  311 , and the second elastic member  36  is compressed by the rod  35 . 
     When the third seat  32  is moved in the first chamber  12 , the at least one second slide  325  slides relative to the at least one first slide  15 , such that the tube  31 , the pin  33 , the snap ring  34 , the rod  35 , the second elastic member  36 , the tip set  37 , the cover  38 , and the push member  39  are moved synchronously. 
     In assembly, referring to  FIGS.  11 - 14    reference to  FIGS.  1 - 10   , the third seat  32  is secured on the tube  31 , and the at least one second slide  325  is slidably connected with the at least one first slide  15  so that the at least one second slide  325  is slidable on the at least one first slide  15 . The second clamping portion  331  protrudes from the third seat  32  and aligns with the two first clamping portions  231 . The snap ring  34  is mounted in the retaining groove  332  and rests on the second resting face  323 . The second end of the pin  33  is fitted into the first end of the rod  35 . The second elastic member  36  is received in the passage  311 . The tip set  37  is mounted on the tube  31 . The cover  38  is secured on the tube  31  so that the cover  38  and the tube  31  are moved synchronously. The receiving space  381  allowing passage of the rod  35 . The push member  39  is fitted on the second end of the rod  35  and housed in the receiving space  381 . The push member  39  is movable in the receiving space  381  through a determined distance. When the push member  39  is pressed, the rod  35  and the pin  33  are driven by the push member  39  and moved in the passage  311 . 
     The screwdriver structure further comprises a third elastic member  40  housed in the first chamber  12  and elastically biased between the resting edge  14  and the press set  30 . When the press set  30  protrudes from the main body  10 , the third elastic member  40  is elastically biased between the resting edge  14  and the press set  30  so that the press set  30  is distant from the main body  10  and the switch set  20 . 
     In the preferred embodiment of the present invention, the drive portion  11  has a recessed end receiving various tips or has a square head. The main body  10  has multiple first slides  15  which are arranged annularly in an inner face of the first chamber  12 . The third seat  32  has multiple second slides  325  which are arranged annularly. 
     In the preferred embodiment of the present invention, the at least one first slide  15  is mounted on or integrally formed on the main body  10 . 
     In the preferred embodiment of the present invention, the first seat  21  has a circular hollow shape. The first receiving recess  211  has a rectangular shape. The opening of the second receiving recess  221  and the opening of the first receiving recess  211  are parallel with each other. The second receiving recess  221  has a rectangular shape. The locking portion  2224  has an arcuate concave shape. The first shaft  224  has a cylindrical shape. The moving portion  243  is a circular stub. 
     In the preferred embodiment of the present invention, the passage  311  has a circular shape. The coupling portion  321  is a circular recess. The second receiving slot  324  has a circular shape. The at least one second slide  325  has a number matching that of the at least one first slide  15 . The retaining groove  332  has an annular shape and aligns with the second resting face  323 . The snap ring  34  rests on the second resting face  323 . The rod  35  has a circular shape. The tip set  37  includes multiple screwdriver tips of different specifications. The screwdriver tips are interchangeably mounted on the drive portion  11 . 
     In the preferred embodiment of the present invention, the third elastic member  40  is a spring that is elastically biased between the resting edge  14  and the second receiving slot  324 . 
     In the preferred embodiment of the present invention, each of the two first clamping portions  231  is made of flexible material. Thus, when the two first clamping portions  231  are pressed by the two first abutting portions  223 , the two first clamping portions  231  are flexed to store a restoring force, and when the two first clamping portions  231  are detached from the two first abutting portions  223 , the two first clamping portions  231  are extended outward by the restoring force. 
     In operation, when the cover  38  is pushed, the cover  38 , the tube  31 , and the third seat  32  are moved synchronously, and the at least one second slide  325  slides on the at least one first slide  15 , such that the cover  38  drives and moves the press set  30 . When the press set  30  is moved in the first chamber  12  toward the switch set  20 , the third seat  32  compresses the third elastic member  40 , the pin  33  pushes the clamping block  23 , and the two first clamping portions  231  are pressed by the two first abutting portions  223  such that the two first clamping portions  231  are moved toward each other and retracted in the second receiving recess  221 . At this time, the clamping block  23  moves the control member  24  and presses the first elastic member  25 , the second shaft  241  is rotated in the third receiving recess  233 , the moving portion  243  is serially moved along the first path  2221 , the second path  2222 , and the third path  2223  to the locking portion  2224 , and is locked on the locking portion  2224 , such that the switch set  20  is disposed at the locked state, and the clamping block  23  is situated at the second position as shown in  FIGS.  7  and  8   . 
     After the moving portion  243  is locked on the locking portion  2224 , the first elastic member  25  is slightly returned, the control member  24  and the clamping block  23  are pushed slightly by the first elastic member  25  and moved toward the opening of the second receiving recess  221 , such that the two first clamping portions  231  are moved to partially protrude from the second receiving recess  221 , and the second clamping portion  331  is clamped by the two first clamping portions  231 . In such a manner, the second clamping portion  331  is restricted by the two first clamping portions  231  such that the press set  30  is locked by the switch set  20  and retracted in the main body  10 , and the cover  38  covers the first chamber  12 . 
     When the push member  39  is pressed, the rod  35  and the pin  33  are driven by the push member  39  and moved toward the switch set  20 , the second elastic member  36  is compressed by the rod  35 , the pin  33  pushes the clamping block  23  which moves the control member  24  and presses the first elastic member  25 , the second shaft  241  is rotated in the third receiving recess  233 , such that the moving portion  243  is unlocked from the locking portion  2224 , and the clamping block  23  is pushed by the first elastic member  25 , such that the moving portion  243  is serially moved along the fourth path  2225  and the fifth path  2226  to the first path  2221 . The first elastic member  25  is elastically returned and moves the control member  24  and the clamping block  23 , and the two first clamping portions  231  are detached from the two first abutting portions  223  such that the two first clamping portions  231  are spaced from each other and fully exposed from the second receiving recess  221 , the switch set  20  is disposed at the unlocked state, and the clamping block  23  is situated at the first position as shown in  FIG.  6   . Thus, the second clamping portion  331  is released from the two first clamping portions  231 , and the press set  30  is unlocked from the switch set  20 , such that the press set  30  is pushed by the third elastic member  40 , and the at least one second slide  325  slides on the at least one first slide  15 , such that the press set  30  is exposed from the first chamber  12  to facilitate the user taking the tip set  37  as shown in  FIG.  15   . 
     Referring to  FIGS.  15 - 17    with reference to  FIGS.  1 - 14   , the switch set  20  is secured in the second chamber  13 , and the two first clamping portions  231  align with the opening of the first chamber  12 . The press set  30  is assembled with the main body  10 . The at least one second slide  325  is slidably connected with the at least one first slide  15 , and the press set  30  is moved relative to the switch set  20 , so that the press set  30  is hidden in the first chamber  12  or protrudes from the main body  10 . The third elastic member  40  is elastically biased between the resting edge  14  and the second receiving slot  324 . When the press set  30  is exposed from the first chamber  12  of the main body  10 , the tip set  37  is exposed completely to facilitate the user taking the screwdriver tips of the tip set  37  for the drive portion  11 . 
     Referring to  FIGS.  18 - 20    with reference to  FIGS.  1 - 17   , when the cover  38  is pushed, the press set  30  is moved and locked by the switch set  20  so that the press set  30  is secured to the main body  10 , and the tip set  37  of the press set  30  is hidden in the first chamber  12  of the main body  10 . 
     In another preferred embodiment of the present invention, the first seat  21  and the second seat  22  are formed integrally, and the tube  31  and the third seat  32  are formed integrally. 
     In another preferred embodiment of the present invention, the tube  31  and the cover  38  are formed integrally, and the rod  35  and the push member  39  are formed integrally. 
     The screwdriver structure of the present invention has the following advantages. 
     1. The press set  30  is assembled with the main body  10  and the switch set  20  and is movable in the first chamber  12 . When the press set  30  is pressed, the press set  30  is moved to push the switch set  20  so that the press set  30  is locked by the two first clamping portions  231  and positioned in the first chamber  12  without detachment. When the press set  30  is pressed again, the press set  30  is unlocked from the two first clamping portions  231  so that the press set  30  is moved and exposed from the main body  10 . Thus, the user only needs to press the press set  30  reciprocatingly to fold the press set  30  onto the main body  10  or expose the press set  30  from the main body  10 , thereby facilitating the user operating the screwdriver structure. 
     2. The press set  30  is folded and hidden in the main body  10  when the switch set  20  is disposed at the locked state. When the press set  30  is pressed, the switch set  20  is disposed at the unlocked state so that the press set  30  is unlocked from the switch set  20 . Then, the press set  30  is pushed by the third elastic member  40 , and the at least one second slide  325  slides on the at least one first slide  15 , such that the press set  30  is exposed from the first chamber  12  to facilitate the user taking the tip set  37 . Thus, the user only needs to press the press set  30  to expose the press set  30  from the main body  10 , thereby facilitating the user operating the press set  30 . 
     3. The press set  30  is clamped by the two first clamping portions  231 , and the elastic force the third elastic member  40  is applied on the two first clamping portions  231 , so that the two first clamping portions  231  share the elastic force the third elastic member  40  evenly. 
     4. When press set  30  is pressed, the rod  35  and the pin  33  are driven by the push member  39  and moved toward the switch set  20 , the second elastic member  36  is compressed by the rod  35 , the pin  33  pushes the clamping block  23  which moves the control member  24  and presses the first elastic member  25 , and the second shaft  241  is rotated in the third receiving recess  233 , such that the moving portion  243  is unlocked from the locking portion  2224 , the clamping block  23  is pushed by the first elastic member  25 , and the two first clamping portions  231  are detached from the two first abutting portions  223 , such that the two first clamping portions  231  are spaced from each other and fully exposed from the second receiving recess  221 . Thus, the switch set  20  is disposed at the unlocked state, the second clamping portion  331  is released from the two first clamping portions  231 , and the press set  30  is unlocked from the switch set  20 , such that the press set  30  is pushed by the third elastic member  40 , the at least one second slide  325  slides on the at least one first slide  15 , and the press set  30  is exposed from the first chamber  12 . 
     5. When the cover  38  is pushed, the press set  30  is driven by the cover  38  and moved toward the switch set  20 , the third seat  32  compresses the third elastic member  40 , the pin  33  pushes the clamping block  23 , and the two first clamping portions  231  are pressed by the two first abutting portions  223 , such that the two first clamping portions  231  are moved toward each other and hidden in the second receiving recess  221 . At this time, the clamping block  23  moves the control member  24  and presses the first elastic member  25 , the second shaft  241  is rotated in the third receiving recess  233 , the moving portion  243  is moved to and locked on the locking portion  2224 , such that the switch set  20  is disposed at the locked state, and the second clamping portion  331  is clamped by the two first clamping portions  231 . Thus, the press set  30  is locked by the switch set  20  and hidden in the main body  10 , and the cover  38  covers the first chamber  12 . 
     6. When the clamping block  23  is pressed, the control member  24  is driven and moved by the clamping block  23 , the second shaft  241  is naturally rotated in the third receiving recess  233 , and the moving portion  243  is serially moved along the first path  2221 , the second path  2222 , and the third path  2223  to the locking portion  2224 , and is locked on the locking portion  2224 , such that the switch set  20  is disposed at the locked state. When the moving portion  243  is unlocked from the locking portion  2224 , the moving portion  243  is serially moved along the fourth path  2225  and the fifth path  2226  to the first path  2221 , such that the switch set  20  is disposed at the unlocked state. 
     Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the scope of the invention.