Abstract:
A hair accessory includes a hair accessory body and an anti-slip structure consisting of a plurality of elastic silicon rubber pins or elastic plastic pins and molded on at least one part of the hair accessory body. The formation of the anti-slip structure on the hair accessory is achieved using injection molding technology.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to hair accessories, and more particularly to a hair accessory anti-slip structure, which comprises a plurality of elastic silicon rubber pins or elastic plastic pins distributed over the hair-contact surface of the hair accessory for securing the hair accessory positively to the hair, preventing slipping of the hair accessory from the arranged hair. The invention relates also to the formation of the anti-slip structure on the hair accessory. 
         [0003]    2. Description of the Related Art 
         [0004]    In order to enhance the positioning stability of a hair accessory on the hair, the hair-contact surface of the hair accessory is designed to provide an anti-slip design consisting of a plurality of raised portions. However, the protruding height of the raised portions is limited. Highly protruded raised portions will increase the manufacturing cost and the weight of the accessory, and will also destruct the sense of beauty. If the height of the raised portions is insufficient, the expected anti-slip effect cannot be achieved.  FIGS. 10-11  illustrates a hair clip ( 7 ) with an anti-slip structure according to the prior art. According to this design, the hair clip ( 7 ) comprises two clamping plates hinged together and loaded with a torsion spring, and an anti-slip structure, which comprises a plurality of patching strips ( 8 ) made by injection-molding. Each patching strip ( 8 ) comprises a plurality of pins ( 81 ). The patching strips ( 8 ) are respectively bonded to the claws ( 71 ) of each clamping plate of the hair clip ( 7 ). This prior art design of hair clip ( 7 ) has the drawback of complicated manufacturing process. Further, bonding the patching strips ( 8 ) to the hair clip ( 7 ) greatly increases the weight and affects the sense of beauty. 
       SUMMARY OF THE INVENTION 
       [0005]    The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a hair accessory, which comprises a hair accessory body, and an anti-slip structure consisting of a plurality of elastic silicon rubber pins or elastic plastic pins and molded on at least one part of the hair accessory body. The formation of the anti-slip structure on the hair accessory includes the step of preparing a mold having a plurality of cavities defined therein, a plurality of filling holes located in a top side thereof and a plurality of molten material flow passages in communication between the filling holes and the cavities, the step of putting a blank hair accessory in a bottom side inside the mold, the step of feeding molten silicon rubber or elastic plastic material through the filling holes of the mold and the molten material flow passages into the elastic silicon rubber pin cavities to mold elastic pins on the hair accessory, and the step of opening the mold and removing the hair accessory with integrated elastic pins from the mold after cooled down. 
         [0006]    Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is a schematic drawing illustrating a strip of elastic material set in a mold in the fabrication for the formation of an anti-slip structure in accordance with a first embodiment of the present invention. 
           [0008]      FIG. 2  is a schematic top elevation of a strip of elastic material with integrated elastic silicon rubber pins obtained according to the hair accessory fabrication method in accordance with the first embodiment of the present invention. 
           [0009]      FIG. 3  is an oblique top elevational view of a hair band in accordance with the first embodiment of the present invention. 
           [0010]      FIG. 4  is an elevational view of a blank shrapnel hairpin before formation of an anti-slip structure in accordance with a second embodiment of the present invention. 
           [0011]      FIG. 5  is a schematic drawing illustrating the blank shrapnel hairpin shown in  FIG. 4  set in a mold for the molding of an anti-slip structure. 
           [0012]      FIG. 6  is an oblique elevational view of the finished shrapnel hairpin with the molded anti-slip structure in accordance with the second embodiment of the present invention. 
           [0013]      FIG. 7  is a schematic side view illustrating the shrapnel hairpin fastened to the hair. 
           [0014]      FIG. 8  is a side view of a hair clip with an anti-slip structure in accordance with a third embodiment of the present invention. 
           [0015]      FIG. 9  is a schematic drawing illustrating an alternate design of the elastic silicon rubber pins (or elastic plastic pins) of the anti-slip structure in accordance with the present invention. 
           [0016]      FIG. 10  is an elevational view of a hair clip with an anti-slip structure according to the prior art. 
           [0017]      FIG. 11  is an elevational view of one patching strip of the anti-slip structure of the hair clip shown in  FIG. 10 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0018]    Referring to  FIGS. 1-3 , a hair accessory in accordance with a first embodiment of the present invention is a hair band ( 13 ). The hair band ( 13 ) comprises an anti-slip structure consisting of a plurality of elastic silicon rubber pins ( 3 ) (or elastic plastic pins) that are evenly distributed over at least one of opposing inner and outer surfaces thereof. When the hair band ( 13 ) is fastened to the hair (A), the elastic silicon rubber pins ( 3 ) (or elastic plastic pins) are engaged into the hair (A), securing the hair band ( 13 ) positively to the hair (A). The hair band ( 13 ) is made from a strip of elastic material ( 1 ) comprising an elastic base layer ( 11 ) and a braided cover layer ( 12 ) surrounding the elastic base layer ( 11 ). 
         [0019]    The formation of the anti-slip structure on the hair band ( 13 ) comprises the steps of: 
         [0020]    preparing a mold ( 2 ) that comprises a plurality of cavities ( 23 ) defined therein according to the arrangement of the elastic silicon rubber pins ( 3 ) of the hair band ( 13 ) to be made, a plurality of filling holes ( 21 ) located in a top side thereof and a plurality of molten material flow passages ( 22 ) in communication between the filling holes ( 21 ) and the cavities ( 23 ); 
         [0021]    putting the strip of elastic material ( 1 ) in a bottom side inside the mold ( 2 ); 
         [0022]    feeding molten silicon rubber or elastic plastic material through the filling holes ( 21 ) of the mold ( 2 ) and the molten material flow passages ( 22 ) into the elastic silicon rubber pin cavities ( 23 ); 
         [0023]    opening the mold ( 2 ) and removing the strip of elastic material ( 1 ) with integrated elastic silicon rubber pins ( 3 ) (or elastic plastic pins) from the mold ( 2 ) after cooled down; 
         [0024]    cutting the strip of elastic material ( 1 ) with integrated elastic silicon rubber pins ( 3 ) into pieces according to the desired length; and 
         [0025]    bonding two opposite ends ( 111 ) of each cut piece to form an individual hair band ( 13 ). 
         [0026]    Referring to  FIGS. 4-7 , a hair accessory in accordance with a second embodiment of the present invention is a shrapnel hairpin ( 4 ). The shrapnel hairpin ( 4 ) comprises a center pin ( 42 ) having a wave-like pin body ( 421 ), two clamping arms ( 41 ) respectively curved from one end of the center pin ( 42 ) in direction toward an opposite end of the center pin ( 42 ), and an anti-slip structure consisting of a plurality of elastic silicon rubber pins ( 3 ) (or elastic plastic pins) that are evenly distributed over one surface of each clamping arm ( 41 ). When the shrapnel hairpin ( 4 ) is fastened to the hair (A), the elastic silicon rubber pins ( 3 ) (or elastic plastic pins) are engaged into the hair (A), securing the shrapnel hairpin ( 4 ) positively to the hair (A). Further, two mating fastening components ( 411 ) are respectively located at the free ends of the two clamping arms ( 41 ) and detachably fastenable to each other to secure the free ends of the two clamping arms ( 41 ) together. 
         [0027]    The formation of the anti-slip structure on the shrapnel hairpin ( 4 ) comprises the steps of: 
         [0028]    preparing a mold ( 5 ) that comprises a plurality of cavities ( 53 ) defined therein according to the arrangement of the elastic silicon rubber pins ( 3 ) of the shrapnel hairpin ( 4 ) to be made, a plurality of filling holes ( 51 ) located in a top side thereof and a plurality of molten material flow passages ( 52 ) in communication between the filling holes ( 51 ) and the cavities ( 53 ); 
         [0029]    putting the blank shrapnel hairpin ( 4 ) in a bottom side inside the mold ( 5 ); 
         [0030]    feeding molten silicon rubber or elastic plastic material through the filling holes ( 51 ) of the mold ( 5 ) and the molten material flow passages ( 52 ) into the elastic silicon rubber pin cavities ( 53 ) to mold the desired elastic silicon rubber pins ( 3 ) (or elastic plastic pins) on the clamping arms ( 41 ) of the shrapnel hairpin ( 4 ); and 
         [0031]    opening the mold ( 5 ) and removing the shrapnel hairpin ( 4 ) with integrated elastic silicon rubber pins ( 3 ) (or elastic plastic pins) from the mold ( 5 ) after cooled down. 
         [0032]    Referring to  FIG. 8 , a hair accessory in accordance with a third embodiment of the present invention is a hair clip ( 6 ). The hair clip ( 6 ) comprises two clamping plates ( 61 ) hinged together and loaded with a torsion spring (not shown), and an anti-slip structure consisting of a plurality of elastic silicon rubber pins ( 3 ) (or elastic plastic pins) that are evenly distributed over an inner surface ( 63 ) of each claw ( 62 ) of each clamping plate ( 61 ). When the hair clip ( 6 ) is fastened to the hair (A), the elastic silicon rubber pins ( 3 ) (or elastic plastic pins) are engaged into the hair (A), securing the hair clip ( 6 ) positively to the hair (A). 
         [0033]    The formation of the anti-slip structure on the hair clip ( 6 ) comprises the steps of: 
         [0034]    preparing a mold ( 2 ) that comprises a plurality of cavities ( 23 ) defined therein according to the arrangement of the elastic silicon rubber pins ( 3 ) of the hair clip ( 6 ) to be made, a plurality of filling holes ( 21 ) located in a top side thereof and a plurality of molten material flow passages ( 22 ) in communication between the filling holes ( 21 ) and the cavities ( 23 ); 
         [0035]    putting the two clamping plates ( 61 ) of the hair clip ( 6 ) in a bottom side inside the mold ( 5 ); 
         [0036]    feeding molten silicon rubber or elastic plastic material through the filling holes ( 51 ) of the mold ( 5 ) and the molten material flow passages ( 52 ) into the elastic silicon rubber pin cavities ( 53 ) to mold the desired elastic silicon rubber pins ( 3 ) (or elastic plastic pins) on the claws ( 62 ) of the clamping plates ( 61 ); and 
         [0037]    opening the mold ( 5 ) and removing the hair clip ( 6 ) with integrated elastic silicon rubber pins ( 3 ) (or elastic plastic pins) from the mold ( 5 ) after cooled down. 
         [0038]    Further, the elastic silicon rubber pins ( 3 ) (or elastic plastic pins) from the mold ( 5 ) can be straight pins, as illustrated in  FIGS. 1-8 . Alternatively, the elastic silicon rubber pins ( 3 ′) (or elastic plastic pins) can be respectively configured to provide a clawed tip ( 31 ′) for hooking on the hair (A) (as illustrated in  FIG. 9 ). 
         [0039]    Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.