Abstract:
A terminal crimping pliers is provided, which is designed with a simple structure, and is used to improve the disadvantages of the conventional terminal crimping pliers, such as being difficult to be grasped and difficult for forces applied thereon. The terminal crimping pliers can be extended with a small angle, through a vertical stopping slot combined with two stopping slots with oblique angles, and the terminal crimping pliers can be held closed with a small force.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of Invention 
   The present invention relates to a pliers exclusively used for manufacturing, assembling, maintaining or repairing line connectors, or current collectors, and more particularly, to a terminal crimping pliers for clamping a terminal tab with electrical connecting lines, which is much easier to be grasped and to be applied with forces thereon. 
   2. Related Art 
   The terminal crimping pliers connects a terminal and electrical connecting lines by way of clamping, thereby producing an electrical conduction. There are various kinds of conventional terminal crimping pliers, from early crimping pliers with a single function to current crimping pliers with multiple functions, such that a user can select suitable pliers optionally. The structural design of the terminal crimping pliers mainly utilizes the lever principle, such that the terminal crimping pliers can be clamped or released through the grasping or relaxing action of the user&#39;s palm. The clamping force is used to combine the terminal tab with the electrical connecting lines. Referring to  FIG. 1 , it shows a conventional terminal crimping pliers  10 , wherein two opposing handles  101 ,  102  are pivotally disposed with a first pivot  103 , such that the handles  101 ,  102  can be clamped or opened via the first pivot  103 . Also, the top of the handle  101  is pivotally disposed at a assembly board  107  with a second pivot  104 , whereas the handle  102  is pivotally disposed in a stopping slot  1051  of the assembly board  107  through a locating bar  105 , such that the moving distance of the whole terminal crimping pliers  10  is limited by the stopping slot  1051 . Furthermore, the top of the handle  101  is provided with a collet  106 , which can protrude within a crimping hole  1071 ; for example, as shown in the figure, when the terminal crimping pliers  10  is open, the locating bar  105  is located at the most right part of the stopping slot  1051 ; when the handles  101 ,  102  are forced to be tightly grasped, the locating bar  105  will move towards left along the stopping slot  1051 , and when the locating bar  105  reaches the most left part of the stopping slot  1051 , the whole terminal crimping pliers  10  is clamped completely, with the collet  106  at the top of the handle  101  being completely protruded. Such a clamping action is utilized by the user to combine a terminal tab with a plurality of electrical connecting lines. However, the structure of such a conventional terminal crimping pliers has a disadvantage in that, since the opening distance enables the collet  106  to return to the bottom, such that a terminal tab (not shown) can be conveniently inserted into the crimping hole  1071  above the collet  106 , when the two handles  101 ,  102  are opened completely, and the angle is usually too large (as the stopping slot  1051  of the locating bar  105  is at horizontal position and the distance is too long), it is difficult for the user with small palms to grasp it completely. In this way, to hold the two handles  101 ,  102  closed, a problem of it being difficult to apply forces thereon occurs. That is, the user needs to grasp the handles with two hands to achieve the complete clamping (protruding) of the collet  106 ; otherwise, although it can be almost grasped, problems of improperly applying forces or applying inadequate forces will occur during clamping. Therefore, how to reduce the angle generated at the opening of two handles, to be suitable for the palms of each user, is the technical means to be disclosed in the present invention. 
   SUMMARY OF THE INVENTION 
   In view of the above problems, an object of the present invention is to provide a terminal crimping pliers, being easy to be held closed and easy to be applied with forces, thereby reducing the inconvenience of operation effectively. The structure of the stopping slot is improved, such that the horizontal moving distance of the locating bar is reduced, and accordingly the opening angle for the two handles will not be too large, and it is convenient for the user to operate. 
   In the terminal crimping pliers of the present invention, two handles are pivotally disposed with a pivot, and a locating bar is disposed at the top of the two handles respectively. The pivot and the two locating bars are received within each stopping slot respectively, and their moving distance is limited by each stopping slot, wherein the stopping slots for the two locating bars are leaned at an angle towards upward, such that the whole left/right moving distance in the horizontal direction is reduced, and therefore, the opening angle between the two handles is reduced, which is more suitable for operation. 
   Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     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: 
       FIG. 1  is a conventional terminal crimping pliers; 
       FIG. 2  is a schematic view of the assembly of the present invention; 
       FIG. 3  is a stereogram view of a terminal crimping pliers of the present invention; 
       FIG. 4  is an embodiment when the terminal crimping pliers of the present invention is held closed; 
       FIG. 5  is a plan perspective view when the terminal crimping pliers of the present invention is held closed; 
       FIG. 6  is a plan perspective view when the terminal crimping pliers of the present invention is opened; and 
       FIG. 7  is an embodiment when the terminal crimping pliers of the present invention is opened. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   Referring to  FIG. 2 , it is a schematic view of the assembly of the present invention. As shown in the figure, as for the terminal crimping pliers  200  of the present invention, two opposing handles  201 ,  202  are pivotally disposed in a first stopping slot  2031  of an assembly board  207  through a pivot  203 , and then the two opposing handles  201 ,  202  can be oppositely opened or closed. As shown, a first locating bar  204  and a second locating bar  205  are disposed adjacent to the top of the first stopping slot  2031 , wherein the first locating bar  204  and the second locating bar  205  can pass through the handles  201 ,  202  via a second stopping slot  2041  and a third stopping slot  2051  of the assembly board  207 . As shown, the assembly procedure for each element is that, the pivot  203 , the first locating bar  204 , and the second locating bar  205  pass through each stopping slot (the first stopping slot  2031 , the second stopping slot  2041 ; and the third stopping slot  2051 ) of the assembly board  207 ; as shown, the pivot  203  passes through the first stopping slot  2031  of the assembly board  207 ; the first locating bar  204  passes through the second stopping slot  2041  of the assembly board  207 ; and the second locating bar  205  passes through the third stopping slot  2051  of the assembly board  207 ; after passing through the first stopping slot  2031 , the pivot  203  then passes through the handles  201 ,  202 , such that the two handles  201 ,  202  are pivotally disposed. The pivot  203  can move up and down within the first stopping slot  2031 . Also, the end of the pivot  203  then passes through an interlocking post  2061  at the bottom of a collet  206 , wherein the collet  206  and the interlocking post  2061  are integrated as a whole, with a general T-shape. At the bottom of the interlocking post  2061 , a through hole  20611  is provided for being passed by the pivot  203 . After passing through the second stopping slot  2041  and the third stopping slot  2051 , the first locating bar  204  and the second locating bar  205  can move back and forth within the distance defined by the second stopping slot  2041  and the third stopping slot  2051 . Thus, each element has been assembled, as shown in  FIG. 3 . 
   Referring to  FIG. 3 , it is a stereogram view after the present invention has been assembled. As shown in the figure, the assembly board  207  is provided with a plurality of crimping holes (as shown by  2071 ,  2072 ,  2073 ), wherein the several crimping holes ( 2071 ,  2072 ,  2073 ) are used to accommodate a terminal tab and electrical connecting lines (not shown) for carrying out a crimping operation, such that the collet  206  is closely adjacent to the bottom of each crimping hole ( 2071 ,  2072 ,  2073 ), and during the crimping operation, the collet  206  can carry out the operations of propping-up and releasing in each crimping hole ( 2071 ,  2072 ,  2073 ). 
   Referring to  FIG. 4 , the first stopping slot  2031  is formed at a vertical axial direction, as shown in the figure, such that the pivot  203  can move up and down within the first stopping slot  2031 , while the second stopping slot  2041  and the third stopping slot  2051  are formed at an axial direction leaned towards upward with a proper angle respectively (such as, angles a, b shown in  FIG. 5 ). In this way, the first locating bar  204  and the second locating bar  205  can move back and forth within the second stopping slot  2041  and the third stopping slot  2051  with oblique angles. Referring to  FIG. 5 , when forces are applied upon the two opposing handles  201 ,  202  to hold them closed, the first locating bar  204  and the second locating bar  205  can move within the second stopping slot  2041  and the third stopping slot  2051 , that is, when the handles  201 ,  202  are forced to produce a relative movement, the first locating bar  204  and the second locating bar  205  are associately moved. As shown in the figure, when the first locating bar  204  and the second locating bar  205  are moving, the collet  206  is interlocked to move upwards, since the connection slots  2062  at both sides of the interlocking post  2061  are interlocked due to the moving upwards of the pivot  203  and also the movement (oppositely opening) of the first locating bar  204  and the second locating bar  205 . Therefore, the user can apply a force easily to protrude and push the collet  206  upwards, achieving the clamping of the terminal tab and the electrical connecting lines. 
   Referring to  FIG. 6 , it is an embodiment when the two handles  201 ,  202  of the terminal crimping pliers  20  of the present invention are opened. As shown in the figure, when the two opposing handles  201 ,  202  are opened, the position of the pivot  203  lowers vertically, while the first locating bar  204  and the second locating bar  205  move towards the bottom within the second stopping slot  2041  and the third stopping slot  2051  respectively. When the pivot  203  is lowered, the interlocking post  2061  of the collet  206  is interlocked to move downwards, and accordingly, the collet  206  will be interlocked to move downwards, that is, the releasing mode for the collet  206 . Back to the figure, at the releasing mode for the collet  206 , the first locating bar  204  and the second locating bar  205  are located within the connection slots  2062  at both sides of the interlocking post  2061 , wherein the connection slot  2062  is of an arc shape, such that the first locating bar  204  and the second locating bar  205  can move smoothly along the arc-shaped track. 
   When the two opposing handles  201 ,  202  are opened to a maximum limit, as shown in  FIG. 7 , the pivot  203  is located at the bottom of the first stopping slot  2031 , and the two locating bars  204 ,  205  are located at the bottom of the second stopping slot  2041  and the third stopping slot  2051  respectively. 
   As can be known from the above, the terminal crimping pliers of the present invention utilizes the lever principle, such that the forces applied to the terminal crimping pliers are significantly reduced. The present invention is characterized in that, two locating bars are interlocked with the collet at the same time, and the second stopping slot  2041  and the third stopping slot  2051 , used for limiting the two locating bars, are leaned at a proper angle respectively, and therefore, the relative distance of the opening and the closing of the two handles  201 ,  202  may be reduced, and it is easy for the user to grasp, thereby relieving the inconvenience of operation. 
   To provide the terminal crimping pliers with multiple functions, a skinning knife  208  can be provided on the handles  201 ,  202  respectively, for peeling off the electrically insulting sheath outside the electrical connecting line, or a cut-off knife  209  can be provided, for cutting off the electrical connecting line. 
   In summary, after the terminal crimping pliers of the present invention is implemented, the object of being easy to grasp and to apply forces, thereby reducing the inconvenience of operation, can be achieved. 
   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.