Patent Publication Number: US-2003222116-A1

Title: Nail guiding mechanism of nailing gun

Description:
BACKGROUND OF THE INVENTION  
       [0001] The present invention is related to a nail guiding mechanism of nailing gun, which can be easily manufactured at low cost.  
       [0002] FIGS.  5  to  7  show a conventional nailing gun having a gun body  81  and a nail magazine  82 . A nail guiding mechanism  9  is disposed between the gun body  81  and the nail magazine  82 . The nail guiding mechanism  9  is composed of a seat body  91  and a cover board  90 .  
       [0003] One end of the seat body  91  is locked on the gun body  81 . The nail magazine  82  is locked under the bottom face of the seat body  91 . The central portion of the seat body  91  is formed with a nail accommodating hole  911 . The top face of the seat body  91  is formed with a slide channel  913  for a nail striking member (not shown) to strike out a row of nails (not shown) loaded in the nail magazine  82 .  
       [0004] The end of the seat body  91  near the gun body  81  is formed with two engaging blocks  92  respectively disposed on two sides of the slide channel  913 . The other end of the seat body  91  distal from the gun body  81  is formed with two engaging hooks  93  respectively disposed on two sides of the slide channel  913 . Each engaging block  92  has an inclined stop face  921  proximal to the gun body  81 . One end of each engaging hook  93  distal from the seat body  91  is formed with a hook section  931 .  
       [0005] The cover board  90  is formed with four through holes  901  respectively corresponding to the engaging blocks  92  and the engaging hooks  93  for the same to pass through the cover board  90 . A press shank  95  is pivotally disposed on the cover board  90 . A latch ring  96  is pivotally connected with the press shank  95 . When the cover board  90  is mated with the seat body  91  to cover the top face  912  thereof, the latch ring  96  is hooked by the hook sections  931  of the engaging hooks  93  and the press shank  95  is pressed down to tightly latch the latch ring  96  with the engaging hooks  93 . Also, the stop faces  921  of the engaging blocks  92  abut against the cover board  90  so as to fixedly connect the cover board  90  with the seat body  91 .  
       [0006] In the above structure, the engaging blocks  92  and the engaging hooks  93  are integrally formed on the seat body  91 . The engaging blocks  92  and the engaging hooks  93  are respectively formed with inclined stop faces  921  and hook sections  931 . This makes the seat body  91  have a complicated profile. Therefore, the seat body  91  needs to be molded by way of precise dewaxing casting so as to ensure necessary strength and precision.  
       [0007] The precise dewaxing casting leads to quite high manufacturing cost and high price of the nailing gun. Therefore, it is necessary to provide a nail guiding mechanism which can be made by a common processing measure so as to lower manufacturing cost.  
       SUMMARY OF THE INVENTION  
       [0008] It is therefore a primary object of the present invention to provide a nail guiding mechanism of nailing gun. The nail guiding mechanism includes a bottom board, a middle board and a top board. The bottom board is connected between the gun body and the nail magazine. The middle board is formed with multiple connecting holes for multiple locating members to fit therein. The top board is formed with multiple locating holes respectively corresponding to the locating members. The locating members are respectively passed through the locating holes to protrude from the top board. A press shank and a latch ring are pivotally disposed on the top board. When pressing down the press shank, the latch ring is tightly latched with the locating members to fixedly connect the top board with the middle board. The bottom board, middle board, top board and the locating members are independent members which can be made by way of punch. Accordingly, the manufacturing cost is greatly reduced.  
       [0009] The present invention can be best understood through the following description and accompanying drawings wherein: 
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0010]FIG. 1 is a perspective assembled view of the present invention;  
     [0011]FIG. 2 is a perspective exploded view of the present invention;  
     [0012]FIG. 3 is a sectional view of a first embodiment of the nail guiding mechanism of the present invention;  
     [0013]FIG. 4 is a sectional view of a second embodiment of the nail guiding mechanism of the present invention;  
     [0014]FIG. 5 is a perspective assembled view of a conventional nailing gun;  
     [0015]FIG. 6 is a perspective exploded view of the nail guiding mechanism of the conventional nailing gun; and  
     [0016]FIG. 7 is a sectional view of the nail guiding mechanism of the conventional nailing gun. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     [0017] Please refer to FIGS.  1  to  3 . The present invention discloses a nail guiding mechanism of a nailing gun. The nailing gun is composed of a gun body  1 , a nail magazine  10  and the nail guiding mechanism  2 .  
     [0018] The nail guiding mechanism  2  includes a bottom board  21 , a middle board  22  and a top board  25 .  
     [0019] The bottom board  21  has a rear end  211  for locking on the gun body  1 . The bottom board  21  further has a bottom face  212  and a top face  213  opposite to the bottom face  212 . The nail magazine  10  is locked under the bottom face  212  of the bottom board  21 . The central portion of the bottom board  21  is formed with a nail accommodating slot  214  passing through the bottom board  21  from the top face  213  to the bottom face  212 .  
     [0020] The middle board  22  is locked on the top face  213  of the bottom board  21 . The middle board  22  is formed with a nail accommodating section  221  passing through the middle board  22  corresponding to the nail accommodating slot  214  of the bottom board  21 . The middle board  22  has a face connecting with the bottom board  21  and a top face  220  opposite to the face connecting with the bottom board  21 . The top face  220  is formed with a slide channel  222  extending in a lengthwise direction X of the nail accommodating section  221 .  
     [0021] One end of the middle board  22  near the gun body  1  is formed with a first connecting hole  223  for a locating member to fit therein. In this embodiment, the locating member is a tenon  23  upward protruding from the top face  220  of the middle board  22 . The other end of the middle board  22  distal from the gun body  1  is formed with two second connecting holes  224  respectively on two sides of the slide channel  222 . A locating member is fitted in each second connecting hole  224 . In this embodiment, the locating member is an engaging hook  24  upward protruding from the top face  220  of the middle board  22 . The protruding end of the engaging hook  24  is formed with a hook section  242 .  
     [0022] One end of each of the first and second connecting holes  223 ,  224  adjacent to the bottom board  21  is formed with an enlarged section  225 ,  226 . A stop face  227 ,  228  is formed between the enlarged section  225 ,  226  and the first and second connecting hole  223 ,  224 . Each of the tenon  23  and the engaging hooks  24  is formed with a stop section  231 ,  241  corresponding to the enlarged section  225 ,  226 . The stop sections  231 ,  241  of the tenon  23  and the engaging hooks  24  are clamped between the stop faces  227 ,  228  and the bottom board  21  and located in the first and second connecting holes  223 ,  224 .  
     [0023] The top board  25  is mounted on the top face  220  of the middle board  22 . The top board  25  is formed with a first locating hole  251  and two second locating holes  252 . The tenon  23  and the engaging hooks  24  are respectively passed through the first and second locating holes  251 ,  252  to protrude from the top board  25 .  
     [0024] A press shank  26  is pivotally disposed on one face of the top board  25  opposite to the other face connecting with the middle board  22 . A latch ring  27  is pivotally connected with the press shank  26 . The latch ring  27  is hooked by the hook sections  242  of the engaging hooks  24 . When pressing down the press shank  26 , the latch ring  27  is tightly latched with the engaging hooks  24 . At the same time, the tenon  23  abuts against the top board  25  to fixedly connect the top board  25  with the middle board  22 .  
     [0025] It should be noted that in the present invention, the tenon  23  and engaging hooks  24  and the bottom board  21  and middle board  22  are designed as independent members instead of the integrated structure in the conventional nail guiding mechanism. Therefore, the tenon  23  and engaging hooks  24  and the bottom board  21  and middle board  22  can be all made by way of punch. The top board  25  is also made by punching as in the conventional nail guiding mechanism. Accordingly, the manufacturing cost is greatly reduced.  
     [0026] The tenon  23  and engaging hooks  24  and the bottom board  21  and middle board  22  are connected in such a manner that prior to connection between the middle board  22  and the bottom board  21 , the tenon  23  and the engaging hooks  24  are respectively passed through the first and second connecting holes  223 ,  224  of the middle board  22  to protrude from the top face  220  thereof. When locking the middle board  22  on the bottom board  21 , the stop sections  231 ,  241  of the tenon  23  and the engaging hooks  24  are fixedly clamped between the bottom board  21  and the stop faces  227 ,  228  to keep a certain connection strength.  
     [0027]FIG. 4 shows a second embodiment of the present invention, in which the first and second connecting holes  423 ,  424  of the middle board  42  have no enlarged section as in the first embodiment. The bottom board  41  is formed with locating dents  415  respectively corresponding to the first and second connecting holes  423 ,  424 . Each locating dent  415  has a cross-section larger than that of the first and second connecting holes  423 ,  424 . The stop sections  431 ,  441  of the tenon  43  and the engaging hooks  44  are received in the locating dents  415  and clamped by the middle board  42  and the bottom board  41 . This can achieve the same function as the first embodiment.  
     [0028] The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.