Abstract:
The present invention relates to a multi-function exacter knife structure designed with a handle to correlate with the angle of the grip of the user as well as providing a slant panel for slanting the knife, and a wheel structure assisting in cutting and an adjustable structure allowing for adjusting cutting depth. The said structure provides multi function through a safer knife usage design, cutting depth adjustment and angle cutting capability, as well as the capability to cut straight lines without damaging rulers.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a multi-functional exacting knife structure, and specifically a handle design matching the grasping angle of the user, a slant board, a wheel structure and an adjustment structure. Through the said structures the design of the present invention provides a structure allowing adjustment of cutting depth and angle, resulting in a knife tool design with multi-function and safety designs. 
     2. Description of the Prior Art 
     I&#39;m sure that you and I are both very familiar with exacting knifes which primarily provide a simple cutting function and therefore have blades differing in sharpness from most other knifes. There are different demands for the use of exacting knives based on the scope of different applications in different industries. For example, they are used for cutting a thin paneling in the refurbishing industry, but in other industries are used for cutting out letters or other shapes, etc. Thus we find that exacting knives play an important role in both living and work life. 
     The structure of traditional exacting knives consists of a handle with a blade holder, inside of which is a blade with an adjustable appliance at the end of the blade allowing the blade to either be extended or contracted thereby providing the user with an instrument of cutting everything. 
     However, surely everyone has had the experience of being cut because of improperly using an exacter knife. The reason for this is that exacter knife designs do not take in account cutting angles and usage methods. 
     Also, when using an exacter knife to cut in a straight line a ruler must be used for guidance and if the ruler is made of wood or plastic then its edge will often be cut and damaged by the knife. On the other hand if the ruler is made of metal it will damage sharpness of the knife blade. Also, exacter knives also have no way of controlling cutting depth and it is therefore inconvenient to always have to place a board underneath whatever is being cut. 
     In addition to this exacter knives have no way of regulating the cutting angle and when needing to make curved cuts (for example artists or refinishers) the user often has to switch to using a tool with special specifications in order to complete the job. 
     Due to the above described reasons the present inventor has developed a new multi-functional exacter knife structure with the hope of solving well known deficiencies while providing a more safe and convenient to use exacter knife. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a handle design that corresponds to the gripping angle of the user, thereby allowing the user to save energy while cutting while increasing usage safety. 
     Another objective of the present invention is to provide a structure allowing the adjusting the blade cutting depth, thereby maintaining the blade and allowing the blade to not be affected by excessive pressure and influencing blade life because of cutting too deep, as well as being concerned for safety by reducing dangerous breakage because of excessive pressure during cutting. 
     Yet a further objective for the design of the present invention is to provide the ability to cut at angles thereby increasing knife function and solving the problem and inconvenience of having to use a special ruler when cutting at an angle. 
     For a detailed explanation and technical content of the present invention see the following explanation in combination with the attached FIGS.: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of the present invention. 
     FIG. 2 is a perspective exploded view of the present invention. 
     FIG. 3 is a cross-sectional structural view of the present invention. 
     FIG. 4 is a slanted prospective movement view of the present invention. 
     FIG.  5 — 1  is a side view of the present invention illustrating cutting movement. 
     FIG.  5 — 2  is a cross-sectional movement view of the present invention illustrating adjustment movement. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First simultaneously look at FIG.  1  through FIG. 3 showing the present invention providing an exacter knife  1  comprised of a knife part  101  and a handle part  10 . The handle part  10  makes it easier for the user to grasp the knife tool during cutting and extends the distance of cutting edge  21  from the pressure point for increased user safety. Also, the angled design between the knife  101  and the handle  10  enable the user to conserve effort while cutting. 
     Inside of knife part  101  is a trough case  12  inside of which holds blade  2  from which cutting edge  21  is formed. Blade  2  consists of stamped metallic plating that breaks when bent. Blade  2  and trough case  12  together form a blade trough  211 . At the end of blade  2  is a hole  20  through which a button  32  that is part of a holding structure  3  that holds blade  2  in place. Holding structure  3  includes a base  33  on top of which is formed a holding bolt  30  that controls the position of blade  2 . Holding strips  31 ,  31 ′ are located on both sides of base  33 . When blade  2  is encased in blade trough  211  holding strips  31 ,  31 ′ can hold the two together so that blade  2  slides out of blade trough  211  when holding bolt  30  is loosened. 
     On the top of knife tool part  101  is a trough  14  in which an adjusting wheel  4  is contained and in the center of both walls of trough  14  are located notches  141  and  141 ′. Of these notches notch  141  connects to a tube trough  13  at the front through which a shaft  5  passes and the end of shaft  5  passes through notch  141  and a bore hole  41  going through adjusting wheel  4  to fit into the notch  141 ′. On one side of adjusting wheel  4  is located a lock hole  42  that holds fixing bolt  43  which locks shaft  5  in connection with adjusting wheel  4 . 
     The other end of shaft  5  forms a screw part  51  of an appropriate length connecting to a lock hole  61  on an adjusting bolt  6 . At the front of adjusting bolt  6  is a stabilizing piece  63 , which stabilizing piece  63  on the top shapes into guiding support  632  providing blade  2  with guidance and increased control when applying pressure and on the end of guiding support  632  is prop  631  that can adjust the contact depth between cutting edge  21  and the object being cut. 
     On the side of adjusting bolt  6  is a horizontal groove  62  that lines up with a lock hole on the side of knife part  101  through which fixing bolt  151  screws through lock hole  15  and keeps adjusting bolt  6  within the limit of horizontal groove  62 . 
     Also, there is an indentation  11  on the bottom of knife part  101  into which a base  81  for a wheel  8  fits and in indentation  11  is a screw hole  110  that lines up with a hole  810  through base  81  and into which a screw  82  locks, thereby providing the present invention with a support structure that allows the present invention to cut straight lines without the need for a ruler. 
     Now, on the posterior of knife part  101  and adjacent to indentation  11  is lock groove  160  to which the U shaped arm  71  connected to slant panel  7  is fixed to lock groove  160  by means of screw  72  passing through opening  711  in connecting arm  71 , thereby providing the present invention the angle needed for precisely cutting 
     To understand the situation just described above please refer to FIG. 4 which shows how when using the present invention for angle cutting slant panel  7  is able to smoothly attach to the supporting surface and curve to the proper angle by the support of wheel  8  and cutting edge  21 . The meeting point of axis Y, where blade  2  extends out, and axis X, on the plane of slant panel  7 , is the cutting angle. Also, axis Z formed by connecting the rolling point of wheel  8  and the tip of cutting edge  21  on blade  2  is the cutting direction. The present invention thus possesses the functions of cutting at angles and cutting in a straight line without a ruler. 
     Now please refer to FIG.  5 — 1  and FIG.  5 — 2  to see how when using the present invention the user must move handle part  10  up for wheel  8  to provide a support point and cause blade  2  to move in the direction of the surface to be cut. Also, if greater depth adjustment is required holding bolt  30  can be directly adjusted to extend blade  2  out. In the same way if cutting edge  21  of blade  2  needs to be adjusted to a shallow depth adjustable wheel  4  can be turned causing shaft  5  to control the movement of adjustable bolt  6  either forward or backward and thereby allow prop  631  of support piece  63  to be adjusted to within very small distances from the tip of blade  2  further allowing the present invention to increase the life cycle of blade  2  by reducing the pressure put on blade  2  during cutting. 
     Overall, the structure of the present exacter knife invention allows users to conserve energy while cutting and increases exacter knife usefulness by allowing angled cutting; the wheel structure assists cutting to allow the present invention to avoid damage while cutting in a straight line without needing a ruler edge; the adjustable bolt allows control of knife cutting depth while keeping the blade life from being influenced by excessive force and increasing user safety. While the form of apparatus herein described constitutes a preferred embodiment of this invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.