Patent Publication Number: US-2017360454-A1

Title: Medical handpiece having attachable spray, suction and drill units

Description:
CROSS-REFERENCE (S) TO RELATED APPLICATION 
     This application claims priority of Korean Patent Application No. 10-2016-0075909, filed on Jun. 17, 2016, in the Korean Intellectual Property Office, which is hereby incorporated by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill. More particularly, the invention relates to a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill, which has both the function of spraying liquid onto a target to be treated and the function of sucking liquid and foreign matter. 
     Description of the Related Art 
     A cooling-water handpiece and a suction handpiece of a conventional medical handpiece are separately manufactured. Thus, since cooling-water spray and suction are performed by the separate handpieces, a medical staff should hold the respective handpieces to treat a patient. Consequently, this is problematic in that it is inconvenient for the medical staff to perform medical treatment. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made keeping in mind the above problems occurring in the related art, and an aspect of the present invention is directed to a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill, in which a handpiece body includes a spray unit functioning to spray liquid onto a target to be treated, and a suction unit sucking liquid and foreign matter from a target to be treated, and a drill unit instead of the spray unit is optionally mounted to drill a hole in the target to be treated. 
     Objects of the present invention are not limited to the above-mentioned object, and other objects that are not mentioned herein will be clearly understood by those skilled in the art from the following description. 
     In order to accomplish the object, the present invention provides a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill, including a handpiece body having an accommodation space therein; a spray unit receiving liquid from an outside to spray the liquid onto a target to be treated; a pump unit transmitting air pressure to the spray unit to increase a spray speed of liquid sprayed by the spray unit; a drive unit converting a rotary motion into a reciprocating motion to transmit power to the pump unit; and a suction unit sucking liquid and foreign matter from the target to be treated. 
     The spray unit may include a longitudinal spray pipe; a spray passage communicating with the spray pipe, and receiving the liquid from the outside to supply the liquid to the spray pipe; and a spray nozzle coupled to an end of the spray pipe. 
     The drive unit may include a drive motor; a cam part having a connecting rod connected with the drive motor, and an engagement cylinder fixing the connecting rod; a bevel gear part connected with the cam part, and converting a rotary motion of the drive motor into a reciprocating motion; and a drive shaft connected with the bevel gear part, and transmitting power converted into the reciprocating motion to the pump unit. 
     The bevel gear part may include a first bevel gear coupled with the engagement cylinder to perform a rotary motion; and a second bevel gear engaging with the first bevel gear to rotate in a direction perpendicular to a direction in which the first bevel gear rotates. 
     The second bevel gear may include a rotating shaft formed on a side of an upper surface of the second bevel gear. 
     The drive shaft may have on a side thereof a rotary recess, and the rotating shaft may be connected to the rotary recess, so that a reciprocating motion may be performed as the second bevel gear rotates, and thereby power may be transmitted to the pump unit. 
     The pump unit may include a cylinder having on an outer circumference thereof a bellows pipe; a piston connected with the drive shaft to perform a reciprocating motion in the cylinder; and a compression rod seated on an end of the spray pipe and transmitting air pressure to the spray pipe as the piston may reciprocate. 
     A drill unit may be optionally coupled to the connecting rod connected with the drive motor, the drill unit including a chuck part coupled with the connecting rod; and a drill bit connected with the chuck part. 
     The suction unit may include a longitudinal suction pipe; an intake passage sucking liquid and foreign matter that are sucked by the suction pipe; and a suction nozzle coupled to an end of the suction pipe. 
     The handpiece body may include a trigger to optionally actuate any one of the spray unit, the suction unit and the drill unit. 
     The medical handpiece having liquid spray and suction functions and capable of being replaced with the drill according to the present invention so as to solve the above-mentioned problems has the following effects. 
     The present invention is advantageous in that it includes the spray unit functioning to spray liquid onto the target to be treated, and the suction unit sucking liquid and foreign matter from the target to be treated, thus being capable of spraying and sucking liquid only by one body. 
     Further, the present invention is advantageous in that the drill unit instead of the spray unit may be optionally mounted to drill the hole in the target to be treated. 
     Effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned herein will be clearly understood by those skilled in the art from claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a view illustrating a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill, according to a first embodiment of the present invention; 
         FIGS. 2 and 3  are views illustrating sections of the medical handpiece having the liquid spray and suction functions and capable of being replaced with the drill, according to the first embodiment of the present invention; 
         FIGS. 4A to 4C  are views illustrating an operating method illustrating the medical handpiece having the liquid spray and suction functions and capable of being replaced with the drill, according to the first embodiment of the present invention; and 
         FIG. 5  is a view illustrating a state in which a drill unit of the medical handpiece having the liquid spray and suction functions and capable of being replaced with the drill according to the first embodiment of the present invention is mounted. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description of the embodiments, the same components will carry the same terms and reference numerals, and a duplicated description thereof will be omitted herein. Further, in the description of the embodiments of the present invention, the configuration of the drawings is merely for the illustrative purpose, and various shapes are possible without limiting the scope of the invention. 
     The present invention relates to a medical handpiece, and more particularly to a medical handpiece having a spray function of spraying liquid such as cooling water or cleaning water into a target to be treated, and a suction function of sucking liquid of a target to be treated and foreign matter secreted by the body after the liquid is sprayed. 
     Since heat of high temperature is generated in a target to be treated, for example, skin or bone, in a medical treatment process, it is necessary to spray liquid such as cooling water or cleaning water into the target to be treated so as to cool the heat of high temperature resulting from the treatment process and alleviate a patient&#39;s pain, and it is also necessary to suck foreign matter such as blood or pus secreted by the body in the treatment process, namely, suction is required. 
     Further, according to another embodiment of the present invention, a drill may be optionally mounted to drill a hole in the bone of the body or the like instead of the spray function and the suction function. 
     Referring to  FIGS. 1 to 3 , an accommodation space is defined in the handpiece body  10 , and a spray unit  100 , a pump unit  200 , a drive unit  300  and a suction unit  500  are mounted in the accommodation space. 
     The spray unit  100  receives liquid, cleaning water or the like from an outside, namely, a separate device (not shown), and functions to spray the liquid onto the target to be treated. 
     A spray passage  130  receives liquid, cleaning water or the like from the separate device (not shown). Further, a spray pipe  120  communicates with the spray passage  130 , and receives the liquid from the spray passage  130 , thus spraying the liquid through a spray nozzle  150  coupled to an end of the spray pipe  120 . 
     Although will be described later, the pump unit  200  transmits air pressure to the spray unit  100 , thus increasing the spray speed of liquid sprayed by the spray unit  100 . Thus, the spray unit  100  sprays the liquid onto the target to be treated, and additionally, the pump unit  200  increases the spray speed of liquid sprayed from the spray unit  100 . 
     Referring to  FIGS. 2 and 3 , the suction unit  500  includes a suction pipe, an intake passage  540 , and a suction nozzle  560 . 
     The longitudinal suction pipe  520  is provided on a lower portion of the handpiece body  10 . Further, the suction nozzle is coupled to an end of the suction pipe  520 . 
     The suction pipe  520  may be separately coupled to the suction nozzle  560 , and may be formed integrally with the above-described spray nozzle  150  for the convenience of manufacture. 
     The suction pipe  520  is connected with the intake passage  540 , and the intake passage  540  is connected with a separate intake device (not shown). Thus, if the intake device is actuated, liquid and foreign matter secreted by the body, which are sucked through the suction nozzle  560  and the suction pipe  520 , are sucked through the intake passage  540  into the intake device. 
     Therefore, the medical handpiece according to the present invention has both the liquid spray function and the suction function. 
     Referring to  FIGS. 2 to 4 , the drive unit  300  includes a drive motor  310 , a cam part  320 , a bevel gear part  350 , and a drive shaft  370 . 
     The cam part  320  includes a connecting rod  321  connected with the drive motor  310 , and an engagement cylinder  323  fixing the connecting rod  321 . The connecting rod  321  is detachably coupled to a groove formed in an upper end of the engagement cylinder  323  through interference fitting or the like. The cam part  320  is connected with the bevel gear part  350  that will be described later, and functions to transmit the rotating force of the drive motor  310  to the bevel gear part  350 . 
     The bevel gear part  350  includes a first bevel gear  351  and a second bevel gear  352 , and functions to convert the rotary motion of the drive motor  310  into the reciprocating motion. 
     The first bevel gear  351  is coupled with the engagement cylinder  323 . Since all of the drive motor  310 , the connecting rod  321  and the engagement cylinder  323  are connected with each other, the rotation of the drive motor  310  leads to the rotation of the first bevel gear  351 . 
     The second bevel gear  352  engages with the first bevel gear  351  to rotate in a direction perpendicular to the rotating direction of the first bevel gear  351 . 
     A cylindrical rotating shaft  360  is provided on a side of an upper surface of the second bevel gear  352 . That is, the rotating shaft  360  is not located at a center of the upper surface of the second bevel gear  352  but is located eccentrically. 
     The drive shaft  370  has on a side thereof a rotary recess  380 . As the rotating shaft  360  of the second bevel gear  352  is inserted into the rotary recess  380  and then the second bevel gear  352  rotates, the reciprocating motion is performed and thereby power is transmitted to the pump unit  200  that will be described later. 
     Referring to the embodiment illustrated in  FIGS. 3, 4A to 4C , when the rotating shaft  360  is located on a right side of the upper surface of the second bevel gear  352  ( FIG. 4A ), the drive shaft  370  is located on the right side with respect to the upper surface of the second bevel gear  352 . 
     If the drive motor  310  and the first bevel gear  351  rotate, the second bevel gear  352  rotates clockwise, and the drive shaft  370  is located at a lower position with respect to the upper surface of the second bevel gear  352  together with the rotating shaft  360  ( FIG. 4B ). In this case, the drive shaft  370  is slightly inclined. 
     Further, if the drive motor  310  and the first bevel gear  351  continue to rotate, the drive shaft  370  is located on a left side with respect to the upper surface of the second bevel gear  352  together with the rotating shaft  360  ( FIG. 4C ). 
     As such, as the second bevel gear  352  rotates, the drive shaft  370  performs the reciprocating motion. More precisely, the right side on which the rotary recess  380  of the drive shaft  370  is formed performs the rotary motion, and the left side of the drive shaft  370  performs the reciprocating motion while being inclined. 
     Referring to  FIGS. 3, 4A to 4C , the pump unit  200  includes a cylinder  210 , a piston  240 , and a compression rod  260 . 
     The piston  240  is installed in the cylinder  210 . The piston  240  is connected with the drive shaft  370  to reciprocate in the cylinder  210 . 
     Further, a bellows pipe  220  is formed on an outer circumference of the cylinder  210 . The reason why this configuration is adopted is because the drive shaft  370  should perform the reciprocating motion while being inclined, and the piston  240  and the cylinder  210  connected with the drive shaft  370  also should be rotatable up and down while being inclined. 
     The compression rod  260  is seated on an end of the spray pipe  120 , thus functioning to transmit air pressure to the spray pipe  120  as the piston  240  reciprocates. 
     An upper portion of the compression rod  260  has the shape of a gentle arc, and a lower portion thereof has a longitudinally extending shape. The lower portion of the compression rod  260  is inserted into an end of the spray pipe  120  to be slightly spaced apart therefrom. 
     The compression rod  260  is preferably made of soft rubber or the like to compress the upper portion of the compression rod  260  and transmit a compressive force to the end of the spray pipe  120 , in the case of increasing air pressure in the cylinder  210  while the piston  240  reciprocates in the cylinder  210 . 
     That is, as illustrated in  FIG. 4C , when the second bevel gear  352  rotates and thereby the piston  240  compresses air in the cylinder  210 , the upper portion of the compression rod  260  is compressed and simultaneously the lower portion of the compression rod  260  inserted into the spray pipe  120  to be slightly spaced apart therefrom comes into close contact with the spray pipe  120 , thus further increasing the spray speed of the liquid when the liquid introduced into the spray pipe  120  of the spray unit  100  is sprayed. 
     Hereinafter, the operating method of the medical handpiece having the liquid spray and suction functions and capable of being replaced with the drill according to the present invention will be described. 
     Referring to  FIG. 2 ,  FIG. 3  and  FIGS. 4A to 4C , the spray unit  100  receives liquid, cleaning water or the like to spray the liquid through the spray pipe  120  and the spray nozzle  150  onto the target to be treated. 
     Further, when the rotating shaft  360  is located on the right side of the second bevel gear  352  ( FIG. 4A ), the drive shaft  370  is located on the right side and the piston  240  connected with the drive shaft  370  is located at an upper position in the cylinder  210 . In this case, air in the cylinder  210  is not compressed. 
     If the drive motor  310  and the first bevel gear  351  rotate, the second bevel gear  352  rotates clockwise, the drive shaft  370  is slightly inclined, and the piston  240  and the cylinder  210  connected with the drive shaft  370  rotates downwards while being inclined (see  FIG. 4B ). 
     Further, if the drive motor  310  and the first bevel gear  351  continue to rotate, the drive shaft  370  is located on the left side, and the piston  240  connected with the drive shaft  370  compresses air in the cylinder  210  while being located at a lower position in the cylinder  210  (see  FIG. 4C ). 
     Then, the upper portion of the compression rod  260  is compressed and simultaneously the lower portion of the compression rod  260  inserted into the spray pipe  120  to be slightly spaced apart therefrom comes into close contact with the spray pipe  120 , thus further increasing the spray speed of liquid when the spray unit  100  sprays the liquid onto the target to be treated. 
     This will describe a process in which the pump unit  200  is operated while the bevel gears  351  and  352  rotate, in stages. In the case of operating the handpiece according to the present invention, the bevel gears  351  and  352  rotate at high speed. Consequently, while the spray unit  100  sprays the liquid, the pump unit  200  is also operated at high speed, thus increasing the spray speed of the liquid that is sprayed from the spray unit  100 . 
     Referring to  FIGS. 3 to 5 , a drill unit  600  may be optionally mounted to the medical handpiece according to the present invention. 
     The drill unit  600  includes a chuck part  620  and a drill bit  640 . 
     Various kinds of drill bits  640  used in bone surgery or the like may be mounted. The drill bit  640  is connected with the chuck part  620 . The chuck part  620  means a component for fixing the drill to a drilling machine or the like. 
     Further, the chuck part  620  is optionally coupled with the connecting rod  321  that is connected to the drive motor  310 . A replacement process with the drill is as follows. 
     First, the handpiece body  10 , the spray unit  100 , the pump unit  200  and the bevel gear part  350  are separated. After the engagement cylinder  323  is separated from the connecting rod  321 , the chuck part  620  of the drill unit  600  is coupled to the connecting rod  321  connected to the drive motor  310 . Thus, the medical handpiece having the liquid spray and suction functions and capable of being replaced with the drill according to the present invention may be used as a drill that is employed to perform an operation on the bone of the body or the like. 
     Referring to  FIGS. 3 to 5 , the handpiece body  10  includes a trigger  700  to optionally actuate any one of the spray unit  100 , the suction unit  500  and the drill unit  600 . Further, the handpiece body  10  includes a controller (not shown) that is connected with the trigger  700  to control the operation of the spray unit  100 , the suction unit  500 , and the drill unit  600  by pulling the trigger  700 . 
     The embodiment of the present invention may be configured such that the spray unit  100  is operated by pulling the trigger  700  once and the suction unit  500  is operated by pulling the trigger  700  once more. 
     Further, even in the case of mounting the drill unit  600  on the medical handpiece according to the present invention, the drill unit  600  may be actuated by the trigger  700 , as in the above-described embodiment. 
     While the invention has been shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, it is to be understood that the scope of the invention is not limited to the above-described embodiments, and all changes that fall within meets and bounds of the claims, or equivalence of such meets and bounds are intended to be embraced by the claims.