JP2019217326A - Surgical operation system and surgical operation tool used in surgical operation system - Google Patents

Abstract

To reduce wear of a component of an air motor.SOLUTION: A surgical operation system is configured, comprising a surgical handpiece side system 102, a working fluid supply side system 103, and a foot control switch 104. The surgical handpiece side system is configured to comprise: a surgical handpiece including an air motor and an attachment; and an air hose for supplying a working fluid to the air motor of the surgical handpiece. In the air motor are provided a rotor that rotates in response to a flow of the working fluid, a rotor case that houses the rotor, and a sleeve disposed between the rotor and the rotor case. The sleeve is configured separately from the rotor and rotates while following rotation of the rotor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surgical operating system and a surgical operating device used in the surgical operating system, for example, a surgical operating device using compressed air as a working fluid.

  In the field of surgery, a surgical tool that rotates a cutting tool using a flow of compressed gas such as air or nitrogen (hereinafter sometimes referred to as “working fluid or air”) as a working fluid. Surgical instruments are known.

  Such a surgical operating device is provided with a hand-held instrument called a surgical handpiece. The surgical handpiece has an air motor. The air motor generates a driving force by rotating by the flow of air. In use, the surgical handpiece is fitted with a cutting tool that acts on the desired site. The cutting tool is rotated by the driving force generated by the air motor. An air motor that generates a driving force by a working fluid has a simple configuration, but may have a problem of wear of parts. Further, a problem may occur due to a fluctuation in the pressure inside the hose for supplying the working fluid. Furthermore, due to the drive by the fluid, a coasting rotation occurs at the time of stop, and a time lag may occur between the stop operation of the user and the actual stop of the air motor.

JP-T-2018-500129

An object to be solved by the present invention is to reduce wear of members of an air motor.
Another problem to be solved by the present invention is to suppress the occurrence of trouble of the hose.
Still another problem to be solved by the present invention is to suppress a time lag at the time of stopping.

  In order to solve the above-mentioned problem, a surgical operation system including a surgical handpiece side system, a working fluid supply side system, and a foot control switch is configured. Here, the surgical handpiece side system is configured to include a surgical handpiece including an air motor and an attachment, and an air hose for supplying a working fluid to the air motor of the surgical handpiece. The air motor includes a rotor that rotates in response to the flow of the working fluid, a rotor case that houses the rotor, and a sleeve that is disposed between the rotor and the rotor case. Here, the sleeve is configured separately from the rotor, and rotates following the rotation of the rotor.

  According to the present invention, the life of an air motor can be extended.

FIG. 1 is a diagram illustrating an overall configuration of the present invention. FIG. 2 is a perspective view illustrating the configuration of the surgical handpiece-side system of the present invention. FIG. 3 is a side view illustrating the configuration of the air motor and the air hose of the surgical handpiece of the present invention. FIG. 4 is a side view illustrating the configuration of the side surface of the air motor unit of the surgical handpiece of the present invention. FIG. 5 is a cross-sectional view illustrating the configuration of the cross section of the air motor section of the surgical handpiece of the present invention. FIG. 6 is a cross-sectional view illustrating a detailed configuration of the drive unit of the present embodiment. FIG. 7 is an exploded perspective view illustrating the configuration of the drive unit of the present embodiment. FIG. 8 is a perspective view illustrating the configuration of the braking unit of the present embodiment. FIG. 9 is an exploded perspective view illustrating the configuration of the braking unit of the present embodiment. FIG. 10 is a cross-sectional view illustrating the operation of the braking unit of the present embodiment. FIG. 11 is a cross-sectional view illustrating the configuration of the air hose of the present embodiment. FIG. 12 is a cross-sectional view illustrating the relationship between the hand switch and the flow control unit. FIG. 13 is a cross-sectional view illustrating the operation of the flow control unit of the present embodiment. FIG. 14 is a perspective view illustrating another configuration of the surgical handpiece of the present embodiment.

Hereinafter, embodiments for implementing the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram illustrating the overall configuration of the present invention. As illustrated in FIG. 1, the fluid-driven surgical operation system 101 of the present embodiment includes a surgical handpiece-side system 102, a working fluid supply-side system 103, and a foot control switch 104. .
The fluid-driven surgical operation system 101 is a treatment system that can be used for a surgical operation, and uses a compressed air as a working fluid to rotate a cutting tool called a bar.
The surgical handpiece side system 102 is a terminal system of the fluid-driven surgical operation system 101, and is connected to the foot control switch 104.
The working fluid supply system 103 is a system that receives a working fluid from a supply source (not shown). The working fluid supply system 103 supplies the working fluid received from the supply source to the foot control switch 104.
The foot control switch 104 is a control system provided between the surgical handpiece side system 102 and the working fluid supply side system 103. As shown in FIG. 1, the foot control switch 104 is connected in line with the surgical handpiece side system 102 and the working fluid supply side system 103.

  FIG. 2 is a diagram illustrating a configuration of the surgical handpiece-side system 102 of the present embodiment. As shown in FIG. 2, the surgical handpiece-side system 102 includes an attachment 105, an air motor 107, and an air hose 108. A bar (tip tool) 106 attached to the attachment 105 is detachable, and the operator mounts the bar (tip tool) 106 having a desired shape on the attachment 105 to perform a surgical operation.

  The attachment 105 can be attached to and detached from the air motor 107, and the operator selects an optimal attachment 105 from a plurality of types of attachments 105 and mounts the attachment 105 on the air motor 107 according to the mode of surgery. In the present embodiment, one type of attachment 105 is illustrated to facilitate understanding of the present invention.

Further, the air motor 107 of the present embodiment includes a hand switch 109. The hand switch 109 is a lever that can be gripped by an operator's hand, and a working fluid is supplied to the air motor 107 in conjunction with the movement of the hand switch 109.
The operator can control the supply of the working fluid by grasping the hand switch 109 with his / her hand, so that the air motor 107 can be operated without depending on the foot control switch 104. Further, the air motor 107 can be operated in conjunction with the foot control switch 104.
In the present embodiment, a configuration including the attachment 105 and the air motor 107 may be referred to as a surgical handpiece 110 in some cases. The bar (tip tool) 106 may or may not be attached to the surgical handpiece 110 exemplified in this embodiment.

  FIG. 3 is a side view illustrating a state in which the attachment 105 and the bar (tip tool) 106 are removed from the surgical handpiece-side system 102 of the present embodiment. As shown in FIG. 3, the air hose 108 is provided at one end thereof with an air hose-side first connecting portion 111. The air motor 107 and the air hose 108 are detachably connected via the first connecting portion 111 on the air hose side. At the other end of the air hose 108, an air hose-side second connecting portion 112 is provided. The air hose 108 is detachably connected to the foot control switch 104 via the air hose-side second connecting portion 112.

  FIG. 4 is a side view illustrating the configuration of the air motor 107 of the present embodiment as a single unit. FIG. 4 shows a configuration in which the above-described hand switch 109 is omitted to facilitate understanding of the present invention. As shown in FIG. 4, the air motor 107 includes an air motor-side first connection portion 113 and an air motor-side second connection portion 114. The air motor-side first connection portion 113 is a connection portion that can be connected to the above-described air hose-side first connection portion 111, and includes a supply path that supplies the working fluid supplied from the air hose 108 to the inside of the air motor 107. The air motor-side second connection portion 114 is a connection portion that can be connected to the above-described attachment 105. When the attachment 105 is connected to the air motor 107, the air motor-side second connection portion 114 supplies a driving force generated by the air motor 107 to the attachment 105. Have.

FIG. 5 is a cross-sectional view illustrating a cross-sectional structure of the air motor 107 of the present embodiment. FIG. 5 shows a configuration in which the above-described hand switch 109 is omitted for easy understanding of the present invention. As shown in FIG. 5, the air motor 107 includes an air motor main body and a flow control unit 116. Further, the air motor main body includes a drive unit 117 and a braking unit 118.
In the air motor 107, the air motor main body is an area that generates a driving force in response to the flow of the working fluid. The flow control unit 116 has a flow control function of opening and closing a valve in conjunction with the movement of a hand switch 109 (not shown). The drive unit 117 provided in the air motor main body includes a member that rotates with a working fluid. I have. The drive unit 117 generates a driving force by rotating its members. The braking unit 118 includes a member that brakes the rotation of the drive unit 117. The braking unit 118 allows the drive unit 117 to rotate in response to the pressure of the working fluid that is the pressure fluid. Further, the braking unit 118 inhibits the rotation of the drive unit 117 in response to the decrease in the pressure.

FIG. 6 is a cross-sectional view illustrating a detailed configuration of the drive unit 117 of the present embodiment. As shown in FIG. 6, the drive unit 117 includes a rotor 121, a perforated sleeve 122, a rotor case 123, and a vane 124.
The rotor 121 is a member that rotates about an axis as a center of rotation, and includes a shaft extending along the axis. The shaft can transmit the driving force when the attachment 105 is connected to the air motor 107. Further, the rotor 121 is provided with a vane 124 which is a blade for receiving a working fluid. The drive unit 117 is provided with a plurality of vanes 124. The drive unit 117 generates a driving force by receiving the working fluid in each vane 124.

Referring to FIG. 6, a perforated sleeve 122 is provided outside the rotor 121. Further, a rotor case 123 is provided outside the perforated sleeve 122. A plurality of holes 125 are provided in the perforated sleeve 122.
The perforated sleeve 122 is a member independent of the vane 124, and rotates so as to follow the vane 124 synchronized with the rotation of the rotor 121. As a result, wear of the vane 124 due to wear can be reduced.
Further, in the drive unit 117 of the present embodiment, the working fluid flowing inside the drive unit 117 flows from a position closer to the axis to a position farther from the axis. A part thereof is supplied to a gap between the rotor case 123 and the perforated sleeve 122 through the hole 125. Thereby, the friction between the rotor case 123 and the perforated sleeve 122 is reduced, and the life of the drive unit 117 can be extended.

  FIG. 7 is an exploded perspective view illustrating the configuration of the drive unit 117 described above. As shown in FIG. 7, the perforated sleeve 122, the rotor case 123, and the vane 124 are independent components. When the rotor 121 rotates, the vane 124 rotates while sliding inside the perforated sleeve 122. At the beginning of the rotation of the rotor 121, the rotation speeds of the rotor 121 and the perforated sleeve 122 are different. As the rotor 121 continues to rotate, the rotational speed of the perforated sleeve 122 increases due to the action of friction with the vane 124. Further, as the rotor 121 rotates continuously, the perforated sleeve 122 rotates in a state synchronized with the rotor 121.

  As shown in FIG. 7, the perforated sleeve 122 has a plurality of holes 125. The working fluid (air) acting on the rotation of the rotor 121 hits the vane 124 when the drive unit 117 is driven, and gives a rotating force. At this time, a part of the working fluid flows through the hole 125 from the inside to the outside of the perforated sleeve 122. A part of the working fluid that has flowed out of the perforated sleeve 122 exists between the rotor case 123 and the perforated sleeve 122 and provides a function like a fluid bearing. Thus, the drive unit 117 of the present embodiment can efficiently rotate the rotor 121 while extending the life of the vane 124.

  FIG. 8 is a perspective view illustrating the configuration of the braking unit 118 of the present embodiment. The braking unit 118 of the present embodiment has a structure for braking the rotation of the rotor 121 of the drive unit 117. As shown in FIG. 8, the braking unit 118 includes a brake disk 131 and a braking ring 132. The brake disk 131 is provided with a fluid path 133. The braking ring 132 is connected to the spring 134 and the positioning pin 135.

  FIG. 9 is an exploded perspective view illustrating the configuration of the braking unit 118 of the present embodiment. As shown in FIG. 9, the braking ring 132 of the braking section 118 is configured independently of the brake disk 131. A positioning hole 136 corresponding to the positioning pin 135 is provided in the braking ring 132. Further, the spring 134 of the braking section 118 applies a force for pushing the braking ring 132. The force is such that the braking ring 132 is pushed along the axis toward the brake disk 131.

  A part of the working fluid is supplied to the fluid path 133 of the braking ring 132 when the drive unit 117 operates. The working fluid supplied to the fluid path 133 applies a force to the braking ring 132 so as to push the braking ring 132 toward the spring 134. The working fluid supplied to the fluid path 133 moves the brake ring 132 along the axis so as to prohibit the contact between the brake disk 131 and the brake ring 132.

  FIG. 10 is a cross-sectional view illustrating the operation of the braking unit 118 of the present embodiment. FIG. 10A illustrates a state in which the braking unit 118 of the braking unit 118 stops the rotation of the rotor 121 when the brake is applied. FIG. 10B illustrates a state in which the brake is released and the braking unit 118 permits the rotation of the rotor 121.

  Referring to FIG. 10A, when the brake is applied, the state where the brake disc 131 and the braking ring 132 are in contact with each other is maintained. The spring 134 supports the contact between the braking ring 132 and the brake disk 131 by the force of the spring. A braking portion gap 137 between the brake disk 131 and the braking ring 132 is filled by the braking ring 132 pushed by a spring 134.

  Referring to FIG. 10B, when the brake is released, the brake ring 132 causes the spring 134 to move due to the force of the working fluid (air) supplied to the brake unit gap 137 via the fluid path 133. Move in a direction that opposes the power of The working fluid (air) continuously supplied to the braking portion gap 137 functions to inhibit the contact between the braking ring 132 and the brake disk 131. When the force of the working fluid (air) continuously supplied to the braking portion gap 137 decreases and falls below the force of the spring 134, the braking ring 132 and the brake disk 131 come into contact with each other (FIG. 10A).

  The air motor main body of the present embodiment can suppress the inertial rotation of the rotor 121 when the supply of the working fluid stops due to the operation of the braking unit 118. Further, the braking ring 132 of the braking section 118 can be moved in parallel along the axis by the positioning pin 135. Therefore, when the brake is applied, the surface of the braking ring 132 (the surface on the side of the brake disk 131) and the surface of the brake disk 131 (the surface on the side of the braking ring 132) come into contact simultaneously and entirely. This makes it possible to improve the braking force of the braking section 118 of the present embodiment.

FIG. 11 is a cross-sectional view illustrating the configuration of the air hose 108 of the present embodiment. As described above, the end of the air hose 108 is provided with the first connection portion 111 on the air hose side and the second connection portion 112 on the air hose side. The first connection portion 111 on the air hose side is connected to the air motor 107, and the second connection portion 112 on the air hose side is connected to the foot control switch 104. As shown in FIG. 11, the air hose 108 includes an outer hose 141 and an inner hose 142. The inner hose 142 has two layers, an inner hose inner layer 144 and an inner hose outer layer 145.
The working fluid (air) coming out of the fluid supply source is sent to the air hose 108 via the foot control switch 104. The sent working fluid is supplied to the air motor 107 through the inner space 146 of the air hose 108. The working fluid used to generate the driving force by the air motor 107 is exhausted and discharged through the outer space 143 of the air hose 108.

The outer hose 141 is made of a silicon-based material. Further, as described above, the inner hose 142 is composed of two layers, the inner hose inner layer 144 and the inner hose outer layer 145. The inner hose inner layer 144 is preferably made of a resin containing fluorine as a component. The inner hose outer layer 145 is made of a polymer classified as polyamide. The inner hose outer layer 145 is preferably made of a high heat resistant and high strength engineering plastic classified as aramid. In this embodiment, the inner hose outer layer 145 is wound with fibrous aramid to cover the inner hose inner layer 144. The action of the inner hose outer layer 145 prevents problems with the inner hose 142 when a high-pressure working fluid flows inside the inner hose inner layer 144.
In the air hose 108 of the present embodiment, a member for further protecting the inner hose 142 may be arranged in the outer space 143. For example, by disposing a spiral tube made of resin or a metal spring having high flexibility in the outer space 143, it is possible to prevent a malfunction due to bending or to increase the pressure of the working fluid when the air hose 108 is stepped on. Can also be handled.

FIG. 12 is a cross-sectional view illustrating the relationship between the hand switch 109 and the flow control unit 116 provided in the air motor 107 of the present embodiment. FIG. 12A illustrates a state in which an operator (user) operates the air motor 107 using the surgical handpiece 110. FIG. 12B illustrates a state in which the operator (user) stops the air motor 107.
Referring to FIG. 12A, when the hand switch 109 is grasped and tilted toward the main body, the valve of the flow control unit 116 is opened. Also, as shown in FIG. 12B, when the force for gripping the hand switch 109 (the force in the direction in which the hand switch 109 is depressed) is weakened, the valve is closed by the force of the spring of the flow control unit 116 and the hand is closed. Switch 109 is raised.

FIG. 13 is a cross-sectional view illustrating the operation of the flow control unit 116 of the present embodiment. FIG. 13A illustrates a state in which the operator (user) operates the air motor 107. (A) of FIG. 13 corresponds to (a) of FIG. 12 described above. FIG. 13B illustrates a state in which the operator (user) stops the air motor 107. (B) of FIG. 13 corresponds to (b) of FIG. 12 described above. In FIG. 13, the hand switch 109 is omitted for easy understanding of the configuration and operation of the present embodiment.
As shown in FIG. 13A, when the hand switch 109 is tilted to the main body side, the piston member 151 is lowered in a direction to contract the spring 152. At this time, the O-ring 153 closing the fluid path is also lowered, and the fluid path is opened. As shown in FIG. 13B, when the force for supporting the hand switch 109 is weakened, the piston member 151 is pushed up by the force of the spring 152, and the O-ring 153 moves in the fluid path in conjunction with the movement of the piston member 151. Close.

  FIG. 14 is a perspective view illustrating another configuration of the surgical handpiece 110 of the present embodiment. As shown in FIG. 14, in the fluid-driven surgical operation system 101 of the present embodiment, even when the surgical handpiece 110 is not provided with the hand switch 109, the air motor 107 is operated by operating the foot control switch 104. Rotation and stop can be controlled.

101: Fluid-driven surgical operation system 102: Surgical handpiece side system 103: Working fluid supply side system 104: Foot control switch 105: Attachment 106: Bar (tip tool)
107 ... Air motor 108 ... Air hose 109 ... Hand switch 110 ... Surgical handpiece 111 ... Air hose side first connection part 112 ... Air hose side second connection part 113 ... Air motor side first connection part 114 ... Air motor side second connection part 115 ... Air motor body 116 Flow rate control unit 117 Drive unit 118 Brake unit 121 Rotor 122 Perforated sleeve 123 Rotor case 124 Vane 125 Hole 131 Brake disk 132 Brake ring 133 Fluid path 134 Spring 135 ... Positioning pin 136 ... Positioning hole 137 ... Brake part gap 141 ... Outer hose 142 ... Inner hose 143 ... Outer space 144 ... Inner hose inner layer 145 ... Inner hose outer layer 146 ... Inner space 151 ... Piston member 152 ... Spring 153 ... O-ring

Claims (4)

A surgical handpiece side system,
A working fluid supply system;
Equipped with a foot control switch,
The surgical handpiece side system,
A surgical handpiece including an air motor and an attachment,
An air hose for supplying a working fluid to the air motor of the surgical handpiece,
The air motor,
A rotor that rotates in response to the flow of the working fluid;
A braking unit for braking the rotation of the rotor;
With
The braking unit includes:
A brake disc that rotates with the rotor,
A braking member capable of contacting the brake disc;
A spring for pushing the braking member toward the brake disc;
Have
Surgical surgical instrument.   The surgical operating device according to claim 1,
  The brake disc is
  Providing a flow path for flowing the working fluid,
  The braking member,
  Moves in a direction away from the brake disc based on the force of the working fluid flowing through the flow path
  Surgical surgical instrument.   The surgical operating device according to claim 2,
  The spring is
  The braking member is pushed toward the brake disk so that a desired frictional force is generated at an interface between the braking member and the brake disk in response to the supply stop of the working fluid.
  Surgical surgical instrument.   The surgical operating instrument according to any one of claims 1 to 3,
  The air motor further comprises:
  A rotor case for storing the rotor,
  A sleeve disposed between the rotor and the rotor case,
  The sleeve is
  It is configured separately from the rotor and rotates following the rotation of the rotor
  Surgical surgical instrument.

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