the following description of the preferred embodiment is provided to understand the features and the structures of the present invention . please refer to fig1 to fig5 , which are a perspective view , a side view and a top - down view showing a preferred embodiment according to the present invention ; a perspective view showing the wound opener ; and a view showing a state of use of the preferred embodiment . as shown in the figures , the present invention is a device of automatic mechanical wound opener for head and neck surgery , comprising an operating frame 1 and a wound opener 2 . the operating frame 1 comprises a supporting unit 11 ; and a connecting unit 12 movably connected with the supporting unit 11 , where the supporting unit 11 comprises a first adjusting base 111 and a vertical rod 112 set on the first adjusting base 111 ; and the connecting unit 12 comprises a second adjusting base 121 movably set on the vertical rod 112 and a horizontal rod 122 set on the second adjusting base 121 . the wound opener 2 is set at an end of the horizontal rod 122 of the connecting unit 12 of the operating frame 1 . therein , the wound opener 2 comprises a fixed unit 21 and a drawing unit 22 movably set on the fixed unit 21 ; the fixed unit 21 comprises an adjusting unit 211 with actuator a set at an end of the horizontal rod 122 and a plurality of moving track rods 212 movably set in the adjusting unit 211 ; the drawing unit 22 includes a blade 221 separately set at an end of each one of the moving track rods 212 ; the adjusting unit 211 is set with a chute 213 for movably combining the moving track rods 212 ; each moving track rod 212 is separately set with a locking unit 214 for movably combined with the blade 221 ; a vertical adjusting plate 215 is set on at least one moving track rod 212 ( at an upper side ); and , one blade 221 ( the blade at the upper side ) is connected with the vertical adjusting plate 215 . thus , a novel device of automatic mechanical wound opener of head / neck soft tissues is obtained . using the present invention , the first adjusting base 111 of the supporting unit 11 of the operating frame 1 is set at a side of an operating bed 3 to establish the wound opener 2 . a height of the vertical rod 112 and a fixed position of the vertical rod 112 corresponding to the operating bed 3 are adjusted before setting the first adjusting base 111 . in addition , an operational length of the horizontal rod 122 is adjusted by the second adjusting base 121 before being fixed for adjusting the wound opener 2 according to a patient &# 39 ; s position . thus , the operating frame 1 and the wound opener 2 are fixed on the operating bed 3 for preventing sway during surgery . after the supporting unit 11 and the connecting unit 12 of the operating frame 1 are adjusted to proper positions , the drawing unit 22 of the wound opener 2 is set at a wound on skin of the patient for surgery and each blade 221 is introduced into the wound from outward to inward for hooking head / neck soft tissues at upper and lower sides . the blade 221 moves with the moving track rod 212 within the chute 213 via operation of the actuator a of the adjusting unit 211 ; or , the vertical adjusting plate 215 is used to adjust the position of the blade 221 at the upper side . after each blade 221 is moved to a fixed position , the adjusting unit 211 is fixed to decide wound size , where each blade 221 is adjusted to create a sufficient operative space and to be fixed for maintaining the space . thus , each blade 221 is used to create the operative space , where endoscopes or robotic arms can be smoothly introduced to evaluate and treat lesions . the wound opener 2 helps operators ( doctors ) on head and neck surgeries , where the wound size can be further reduced and the wound can be effectively concealed . during practical use , each blade 221 can be changed based on different requirement . for changing the blade 221 , the locking unit 214 at the end of the moving track rod 212 is removed ; then , the original blade 221 on the moving track rod 212 is taken off ; then , a proper blade is re - set on the moving track rod 212 ; and , then , the locking unit 214 is locked at the end of the moving track rod 212 . thus , the blade 221 is changed to meet special needs of distinct situations . to sum up , the present invention is a device of automatic mechanical wound opener for head and neck surgery , where a mechanic wound opener is used to adjust position and size of a wound for introducing endoscopes or robotic arms to evaluate and treat head and neck lesions ; and , thus , the present invention facilitates surgical procedure , reduces wound size and effectively conceals the wound to make it become invisible . the preferred embodiment herein disclosed is not intended to unnecessarily limit the scope of the invention . therefore , simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention .