Patent Publication Number: US-10780594-B1

Title: Staggered multilayer trimming head applied in an electric haircutter

Description:
BACKGROUND 
     Technical Field 
     The present disclosure generally relates to the field of haircutting devices. More particularly, the present disclosure relates to a staggered multilayer trimming head applied in an electric haircutter, and the staggered multilayer trimming head has an adjustable moving blade design and can adjust a single or multiple cutting tracks and complete different haircutting effects quickly without changing the operator&#39;s original operating habit. 
     Description of Related Art 
     In general, hairstylists use special hairdressing tools such as scissors and electric haircutter to cut and trim hair for their customers, and various types of hairdressing tools are used for the hair cutting and trimming according to the requirements of the hairstylists and customers. 
     However, the scissors for hairdressing usually comes with a sharp blade design to provide the effect of trimming and cutting hair effectively. Therefore, special attention should be paid for the use and storage of these hairdressing scissors. The electric haircutter adopts an electric motor operated together with the alternate operation of the blades to cut and shear hair quickly, and this tool is primarily used for cutting a lot of hair. For example, the cutting speed of a crew cut is fast and usually cannot be controlled precisely for processing the hair in details, so that most hairstylists generally use both scissors and electric haircutter simultaneously when doing haircuts. However, when the aforementioned two hairdressing tools are used, the hairstylists combs a person&#39;s hair to be cut and sheared by holding or using a comb, and then carries out the cutting and shearing operation, and the blades of the scissors and the electric haircutter cut hair from a lateral direction by a unidirectional outward pressing and cutting method. This conventional method not just forms a slant and uneven surface only, but also takes much time for using the special scissors for a layer cut. 
     For example, the electric haircutter comprises a main body, a motor and a power source installed in the main body, a trimming head installed to a front end of the main body. After the trimming head is coupled to the motor with power connection, a cutting and shearing track can be formed, so that the operation is carried out by forming the cutting and shearing track by the trimming head in order to cut and shear hair. Since the shear speed of the electric haircutters is very fast, the electric haircutters are mostly applied for push cutting (or a large-area hair cutting and shearing). During operation, the trimming head is usually operated with a baffle that controls the length of hair, and a side of the trimming head abuts a scalp, and a spacing distance is formed between the baffle and the trimming head, and the trimming length can be adjusted quickly. Therefore, such electric haircutter can be used for large-area haircutting, and a special layer cut still requires a manual operation of the scissors and uses the serrated structures of the blades on both sides to produce a different layered effect, so that and the cut can be carried out quickly and the length of the layer cut can be controlled precisely. Obviously, the conventional method still requires improvements. 
     Therefore, the inventor of the present disclosure based on years of experience in the related hairdressing tool industry to conduct extensive research and experiment, and finally developed a staggered multilayer trimming head applied in an electric haircutter, whose adjustable moving blade design allows a single cutting and shearing track or a plurality of cutting tracks in a cutting and shearing process, so as to achieve various haircutting effects quickly without changing original operating habits. 
     SUMMARY 
     In view of the aforementioned drawbacks of the prior art, the inventor of the present disclosure discloses a staggered multilayer trimming head applied in an electric haircutter, wherein a moving knife module has a first moving knife and at least one second moving knife, and an adjusting lever is coupled to the second moving knife to provide an adjustable moving blade design to allows a single cutting and shearing track or a plurality of cutting tracks in a cutting and shearing process, so as to achieve various haircutting effects quickly without changing original operating habits and improve the haircutting efficiency and quality. 
     To achieve the aforementioned and other objectives, the present disclosure provides a staggered multilayer trimming head applied in an electric haircutter, wherein the electric haircutter has a main body, a motor and a power source installed in the main body, and an electric block coupled to a front end of a rotating shaft of the motor for producing an eccentric rotary motion, and the staggered multilayer trimming head comprises: a bottom plate, installed and fixed to a front end of the main body, and having at least one window formed on a surface of the bottom plate; a fixed blade, fixed onto the bottom plate, and having a first serrated structure equidistantly disposed at a front edge of the fixed blade; a moving knife module, movably installed on a side of the fixed blade, and comprising a first moving knife, at least one second moving knife, at least one adjusting lever, a spring pressing plate and a pressing plate, and the front end of the first moving knife having a second serrated structure configured to be corresponsive to the first serrated structure, and at least one first notch with a quantity corresponding to the quantity of the second moving knives, and the second moving knife having a third serrated structure disposed at a front edge thereof and configured to be corresponsive to the first serrated structure and movably received in the first notch, so that after the second serrated structure and the third serrated structure are combined, the second serrated structure and the third serrated structure are staggered with the first serrated structure, and one or more cutting and shearing track can be formed in a cutting and shearing process, and a rear end of the second moving knife being coupled to the adjusting lever, so that a rear end of the adjusting lever is received in one of the windows which is exposed from the bottom plate, and the spring pressing plate and the pressing plate being provided for pressing and positioning the first moving knife and the second moving knife to a position of the fixed blade; and a moving swing block, fixed to a side of the moving knife module, and coupled to the first moving knife, and the other side of the moving swing block being coupled to the eccentric block; thereby, during operation, the power connection formed between the motor and the moving swing block drives the first moving knife and the second moving knife to move reciprocally and transversally sideway, and the first moving knife and the second moving knife are used for moving alternately, reciprocally, and transversally with respect to the fixed blade to carry out a trimming operation, and the position of the second moving knife is adjusted with respect to the first moving knife to produce a layering sense of hair with unequal lengths. 
     In an embodiment, the bottom plate has a plurality of fixing parts disposed on a side thereof and configured to be corresponsive to the fixed blade and the moving knife module and provided for installing and positioning the fixed blade and the moving knife module. 
     In another embodiment, the first moving blade has a plurality of first notches separately disposed at a front edge of the first moving blade for receiving the plurality of second moving knives respectively, and each second moving knife is coupled to each respective adjusting lever for adjusting the position of each second moving knife with respect to the first moving blade. In addition, the second moving knife has a hook formed at a rear end of the second moving knife, and a first fixed portion disposed at a front end of the adjusting lever and configured to be corresponsive to the hook, and a connection is defined by clamping the first fixed portion to the hook. The staggered multilayer trimming head applied in an electric haircutter according to the present disclosure further comprises a lever switch coupled to a rear end of the adjusting lever and disposed in one of the windows to facilitate adjusting the position of the second moving knife, and the lever switch has a bump, and a second fixed portion disposed at a rear end of the adjusting lever, and a connection is defined by clamping and fixing the second fixed portion to the bump. 
     In summation of the description above, the present disclosure has an adjustable moving blade design and uses the adjusting lever to adjust the position of each second moving knife with respect to the first moving knife quickly and can adjust a single or multiple cutting tracks and complete different haircutting effects quickly without changing the operator&#39;s original operating habit to achieve the effect of improving the haircutting efficiency and quality significantly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. 
         FIG. 1  is an exploded view of a preferred embodiment of this disclosure; 
         FIG. 2  is a cross-sectional view of a preferred embodiment of this disclosure; 
         FIG. 3  is a schematic view of a preferred embodiment of this disclosure in the status when it is installed to a main body; 
         FIG. 4  is a schematic view showing a first adjusting status and a cutting in accordance with a preferred embodiment of this disclosure; 
         FIG. 5  is a schematic view showing a second adjusting status and a cutting in accordance with a preferred embodiment of this disclosure; and 
         FIG. 6  is a schematic view showing a third adjusting status and a cutting in accordance with a preferred embodiment of this disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Reference will now be made in detail to the present embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. 
     With reference to  FIGS. 1, 2 and 3  for the exploded view and cross-sectional view and the schematic view of a preferred embodiment of the present disclosure being installed to a main body, a staggered multilayer trimming head  2  is applied to an electric haircutter  1 , wherein the electric haircutter  1  has a main body  11 , a motor  12  and a power source  13  installed in the main body  11 , an eccentric block  121  coupled to a front end of a rotating shaft of the motor  12  for producing an eccentric rotary motion, and the staggered multilayer trimming head  2  comprises a bottom plate  21 , a fixed blade  22 , a moving knife module  23 , and a moving swing block  24 . 
     Wherein, the bottom plate  21  is installed and fixed to a front end of the main body  11 , and three windows  211  are formed on a surface of bottom plate  21  and arranged with a space from each other. It is noteworthy that a side of the bottom plate  21  has a plurality of fixing parts  212  corresponding to the fixed blade  22  and the moving knife module  23  for installing and positioning the fixed blade  22  and the moving knife module  23 . 
     The fixed blade  22  is fixed onto the bottom plate  21  through the plurality of fixing parts  212 , and a first serrated structure  221  is equidistantly disposed at a front edge of the fixed blade  22 . 
     The moving knife module  23  is movably installed on a side of the fixed blade  22 , and the moving knife module  23  comprises a first moving knife  231 , three second moving knives  232 , three adjusting levers  233 , a spring pressing plate  234  and a pressing plate  235 , and the first moving knife  231  has a second serrated structure  2311  disposed at a front edge thereof and configured to be corresponsive to the first serrated structure  221 , and three first notches  2312  comes with a quantity corresponding to the quantity of the second moving knives  232 , and each second moving knife  232  has a third serrated structure  2321  disposed at a front edge thereof and configured to be corresponsive to the first serrated structure  221 , and each second moving knife  232  is movably received in each first notch  2312 , so that after the second serrated structure  2311  and the third serrated structure  2321  are combined, they are staggered with respect to the first serrated structure  221 , and the rear end of each second moving knife  232  is coupled to each adjusting lever  233 , so that the rear end of each adjusting lever  233  is disposed in each respective window  211  which is exposed from the bottom plate  21 , and the spring pressing plate  234  and the pressing plate  235  are provided for pressing and positioning the first moving knife  231  and each second moving knife  232  on a position of the fixed blade  22 . It is noteworthy that a hook  2322  is formed at a rear end of each second moving knife  232 , and a first fixed portion  2331  is disposed at a front end of each adjusting lever  233  and configured to be corresponsive to the hook  2322 , and the first fixed portion  2331  is clamped to the hook  2322  to define a connection. In addition, the rear end of each adjusting lever  233  has a second fixed portion  2332 , and the staggered multilayer trimming head further has three lever switches  236 , and each lever switch  236  has a bump  2361 , and the second fixed portion  2332  is capable of clamping and fixing to the bump  2361 , so that each lever switch  236  and each respective adjusting lever  233  are coupled to each other, and each lever switch  236  is disposed in each respective window  211  to facilitate adjusting the position of each second moving knife  232 . 
     The moving swing block  24  is fixed to a side of the moving knife module  23 , and the moving swing block  24  is coupled to the first moving knife  231 , and the other side of the moving swing block  24  is coupled to the eccentric block  121 . 
     During operation, the motor  12  produces a power connection through the eccentric block  121  and the moving swing block  24  to drive the first moving knife  231  and the second moving knives  232  reciprocally and transversally sideway, so that the first moving knife  231  and the second moving knife  232  can be moved reciprocally and transversally with respect to the fixed blade  22  to carry out a trimming operation. When the position of each second moving knife  232  with respect to the first moving knife  231  is adjusted, the cutting and shearing tracks of different quantities can be produced quickly to form the required sense of layering. 
     With reference to  FIGS. 4 to 6  for the schematic view of various adjusting statuses and the schematic view of cutting and shearing in accordance with a preferred embodiment of the present disclosure respectively, the position of the staggered multilayer trimming head  2  and unequal quantities of the lever switches  236  of the present disclosure can be adjusted to link with the one or more adjusting levers  233  (of the same quantity) to change the position of the second moving knife  232  with respect to the first moving knife  231  as shown in  FIG. 4  and move the lever switches  236  on both sides upward, and just the lever switch  236  at the middle remains at its original position, so that the two second moving knives  232  on both sides are retracted inwardly to form two cutting and shearing track with the corresponding width of the second moving knife  232  after the cutting and shearing process. In  FIG. 5 , the three lever switches  236  are operated to move upward, so that the three second moving knives  232  are retracted simultaneously, and a cutting and shearing track corresponding to the total width of the three second moving knives  232  is formed after the cutting and shearing process. In  FIG. 6 , the three lever switches  236  are remained in their original positions respectively, so that the three second moving knives  232  is completely coupled to a front edge of the first moving knife  231  for a normal cutting and shearing operation that only uses one cutting and shearing track.