JP6010027B2 - Surgical tools and medical manipulators - Google Patents

Description

The present invention relates to a surgical instrument and a medical manipulator.
This application claims priority based on US Patent Application No. 61 / 515,203 filed in the United States on August 4, 2011, the contents of which are incorporated herein by reference.

  Conventionally, as a medical manipulator, a master-slave type medical manipulator including a master manipulator operated by an operator and a slave manipulator that operates based on a signal emitted from the master manipulator is known. Such a medical manipulator is attached with a surgical instrument having a treatment section for performing a treatment on a treatment target site by remote operation.

  For example, Patent Document 1 discloses a medical manipulator that can be used by replacing a plurality of treatment sections suitable for treatment with respect to an arm of one slave manipulator.

JP 2001-277157 A

In general, medical manipulators are cleaned and sterilized at every operation for the purpose of preventing infections and the like.
In the medical manipulator described in Patent Document 1, since the treatment section is detachable from the slave manipulator, maintenance such as cleaning and sterilization is easy. However, since the number of parts increases in order to realize a configuration in which the treatment part can be attached and detached, the medical manipulator described in Patent Document 1 has a complicated structure of the treatment part, and the cleaning performance is not necessarily improved. I can't say that.
An object of the present invention is to provide a surgical instrument and a medical manipulator that allow a treatment section to be attached and detached with a simple configuration and that have high cleanability.

According to the first aspect of the present invention , a surgical instrument that performs a treatment on a treatment target site includes a cylindrical long member having a longitudinal axis, a treatment portion connected to the long member, and the long piece. A connecting portion that removably connects the member and the treatment portion, and the connecting portion includes a first rotation shaft portion provided on the elongated member, and a second turn provided on the treatment portion. A first rolling guide portion provided with a moving shaft portion, an arc-shaped portion provided on the elongated member and having a center coaxially with the first turning shaft portion; and the second turning portion provided on the treatment portion. A second rolling guide portion having a rolling guide portion having an arcuate portion coaxially with the shaft portion and having the rolling guide portion in rolling contact with the first rolling guide portion; and the first rotation shaft portion And a locking portion that locks the second rotation shaft portion, and the first rotation shaft portion and the second rotation shaft portion In a detachable, the locking portion, said a first rotating shaft portion engageable with and the second rotary shaft portion is connected to the body portion, provided separately from said main body portion and the An annular member that binds the main body portion and the second rotating shaft portion; a binding state in which the annular member is disposed at a position where the main body portion and the second rotating shaft portion are bound; and the annular member is A locking member for switching between an open state arranged at a position deviating from a position where the main body part and the second rotating shaft part are bound together.

According to a second aspect of the present invention, in a surgical instrument according to the first embodiment described above, the front Stories body portion has a groove that defines a movement direction of said annular member and engaged with the annular member, wherein The lock member has a part of the groove and is relatively movable with respect to the main body, and the groove provided in the lock member and the groove provided in the main body are in communication with each other. Switching between the open state and the bundling state is possible, and when the groove provided in the lock member and the groove provided in the main body in the bundling state are not in communication with each other, the long member The treatment section may be held in the bound state.

According to a third aspect of the present invention, the surgical instrument according to the first aspect or the second aspect described above, the prior SL provided in the treatment section operable treatment instrument piece, and the long member and the treatment tool piece A treatment tool piece joint for connecting the treatment tool piece, and a moving member connected to the treatment tool piece action joint for operating the treatment tool piece, wherein the treatment tool piece action joint is connected to the movement tool. A first rotating member for operation that is connected to the member and rotates around a predetermined rotation center, and a position coaxial with the second rotating shaft portion or closer to the rotating shaft portion than the second rotating shaft portion. A second rotation member for operation connected to the first rotation member for operation so as to rotate relative to the first rotation member for operation relative to the first rotation member for operation, and the second rotation for operation A link for converting the rotational force of the member into the operation of the treatment instrument piece, Yointo, due removable in the connecting section may be detached between the second pivot member for the operation with the first rotating member for the operation.

According to a fourth aspect of the present invention, in a surgical instrument according to the third embodiment described above, pre-Symbol treatment instrument piece has a pair, the operation of the treatment instrument piece is a closing of the pair of treatment instrument piece Also good.

According to a fifth aspect of the present invention , a medical manipulator is a slave manipulator having the surgical instrument according to any one of the first aspect to the fourth aspect and at least one joint to which the surgical instrument is attached. When, obtain Preparations and a master manipulator issues operation commands for driving the joints of the slave manipulator.

  The surgical instrument and the medical manipulator of the present invention can be attached and detached with a simple configuration.

1 is an overall view of a medical manipulator including a surgical instrument according to an embodiment of the present invention. It is a perspective view which shows the structure of a part of the surgical instrument. It is explanatory drawing which shows the structure of a part of the surgical instrument. It is explanatory drawing which shows the structure of a part of the surgical instrument. It is explanatory drawing which shows the structure of a part of the surgical instrument. It is a disassembled perspective view which shows the structure of the treatment part in the surgical instrument. It is a figure for demonstrating the bending operation | movement of the treatment part in the same surgical instrument. It is a figure for demonstrating the bending operation | movement of the treatment part in the same surgical instrument. It is a figure for demonstrating the bending operation | movement of the treatment part in the same surgical instrument. It is a perspective view for demonstrating attachment / detachment operation | movement of the treatment part provided in the surgical instrument. It is a perspective view for demonstrating attachment / detachment operation | movement of the treatment part provided in the surgical instrument. It is a perspective view for demonstrating attachment / detachment operation | movement of the treatment part provided in the surgical instrument. It is a perspective view for demonstrating attachment / detachment operation | movement of the treatment part provided in the surgical instrument. It is a perspective view for demonstrating attachment / detachment operation | movement of the treatment part provided in the surgical instrument. It is a perspective view which shows the structure of the other modification of the embodiment. It is a perspective view for demonstrating the effect | action of the modification. It is a perspective view which shows the structure of the modification of the embodiment. It is sectional drawing which shows the structure of the modification.

A surgical instrument 1 and a medical manipulator 100 according to an embodiment of the present invention will be described. FIG. 1 is an overall view of a medical manipulator provided with the surgical instrument of the present embodiment. FIG. 2 is a perspective view showing a configuration of a part of the surgical instrument. 3 to 5 are explanatory views showing a part of the configuration of the surgical instrument. FIG. 6 is an exploded perspective view showing a configuration of a treatment portion in the surgical instrument. 7 to 9 are views for explaining the bending operation of the treatment portion in the surgical instrument. FIGS. 3 to 5 and FIGS. 7 to 9 are schematic diagrams for explaining the configuration of the present embodiment, and the shape of the members may not be shown strictly correspondingly.
The surgical instrument 1 is attached to the medical manipulator 100 as a part of the medical manipulator 100.
First, the configuration of the medical manipulator 100 of this embodiment will be described. As shown in FIG. 1, the medical manipulator 100 includes a master manipulator 101, a control device 110, and a slave manipulator 120.

  The master manipulator 101 functions as a master that transmits the movement of the operator's operation to the slave manipulator 120, and includes a master display unit 102 such as a liquid crystal display device, and an operation unit 103 that the operator holds and operates. With. An operation performed on the operation unit 103 of the master manipulator 101 is input to the control device 110.

The control device 110 includes a master-side control device 111 that receives an input from the master manipulator 101 and a slave-side control device 112 that outputs a drive signal to the slave manipulator 120.
The master-side control device 111 generates an operation command for operating the slave manipulator 120 based on the input from the master manipulator 101, and outputs it to the slave-side control device 112.
The slave side control device 112 generates a drive signal for driving the slave manipulator 120 based on the operation command issued from the master side control device 111 and outputs the drive signal to the slave manipulator 120.

  The slave manipulator 120 has a slave arm 121 that operates according to a drive signal from the slave-side control device 112, and the surgical instrument 1 of this embodiment is attached to the slave arm 121. In addition to the surgical instrument 1 of the present embodiment, a treatment instrument for performing a surgical operation, an endoscope apparatus, and the like can be attached to the slave manipulator 120.

Next, the configuration of the surgical instrument 1 will be described.
The surgical instrument 1 is a medical instrument for performing a treatment on a treatment target site. As shown in FIGS. 1 and 2, the surgical instrument 1 includes a long member 2, a treatment unit 6, a connecting unit 10, and a drive control unit 45.
Hereinafter, the side where the treatment unit 6 is provided in the surgical instrument 1 will be described as the distal side, and the side where the drive control unit 45 is provided in the surgical instrument 1 will be described as the proximal side.

The long member 2 is a cylindrical member having a longitudinal axis. The long member 2 may be flexible or rigid depending on the configuration of the slave arm 121 to be attached. In the present embodiment, an example in which the long member 2 is rigid is shown.
As shown in FIGS. 3 and 7, a connecting rod 3 (moving member) for operating the treatment section 6 is disposed inside the long member 2. The connecting rod 3 has one end connected to the bending double joint 11 described later and the other end connected to the drive control unit 45, and one end connected to the opening / closing joint 27 described later to the drive control unit 45. And an open / close rod 5 having the other end connected thereto.

  The treatment section 6 is provided to treat a treatment target site. In the present embodiment, the treatment section 6 is a forceps having a pair of forceps pieces 7a and 7b that can be opened and closed and a cover 8 that holds the forceps pieces 7a and 7b, as shown in FIGS. The pair of forceps pieces 7a and 7b are connected to each other by a shaft-like member 9 that serves as a rotation shaft of the forceps pieces 7a and 7b.

  The connecting part 10 connects the long member 2 and the treatment part 6. The connecting portion 10 includes a bending double joint 11 for bending the treatment portion 6 with respect to the long member 2 and an opening / closing joint 27 for opening / closing the pair of forceps pieces 7a and 7b.

  The bending double joint 11 includes a first fitting tooth portion 12 fixed to the distal end of the long member 2, a first rotating shaft portion 13 connected to the distal end of the long member 2, A second rotation shaft portion 14 extending in parallel with the one rotation shaft portion 13 and connected to the treatment portion 6, a second fitting tooth portion 15 fixed to the treatment portion 6, and the treatment portion 6 for the long member 2. And a locking portion 16 for switching the connection state.

  The first fitting tooth portion 12 has gear-like teeth on the circumference centering on the rotation center of the first rotation shaft portion 13. Further, the second fitting tooth portion 15 has gear-like teeth on the circumference around the rotation center of the second rotation shaft portion 14, and meshes with the first fitting tooth portion 12. The 1st fitting tooth part 12 and the 2nd fitting tooth part 15 have a tooth | gear on the circumference with an equal radius mutually, and the ratio is set to the relationship of 1: 1.

The second fitting tooth portion 15 can move while rotating along the circumference of the first fitting tooth portion 12. In addition, it replaces with the 1st fitting tooth part 12 and the 2nd fitting tooth part 15, and the plate-shaped member which an outer peripheral part contacts mutually with a frictional force and rotates relatively may be provided.
In addition, in this embodiment, although the structure which made the 1st fitting tooth part 12 and the 2nd fitting tooth part 15 friction-contact by mesh | engagement of a gearwheel was shown, it is necessarily limited to the structure which frictionally contacts by meshing | engagement of a gearwheel. It is not a thing. For example, instead of frictional contact by gear meshing, two rubber rollers (which have a large frictional force) that are not in meshing frictional contact with each other, such as a configuration in which two rubber rollers are in frictional contact with each other, do not slip between the two rotating bodies and rotate. It may be a mechanism capable of

  Both the first rotation shaft portion 13 and the second rotation shaft portion 14 are parallel axes whose rotation centers extend in a direction orthogonal to the extension line of the longitudinal axis of the long member 2.

As shown in FIG. 2, the locking portion 16 includes a main body portion 17, an annular member 19, and a lock member 21.
The main body portion 17 keeps the distance between the first fitting tooth portion 12 and the second fitting tooth portion 15 constant. The bending rod 4 of the connecting rod 3 is connected to the main body portion 17. By moving the bending rod 4 back and forth in the longitudinal axis direction of the long member 2, the main body portion 17 rotates around the first rotation shaft portion 13. As a result, the second turning shaft portion 14 turns with the first turning shaft portion 13 as the turning center.

Further, the main body portion 17 is connected to the first rotation shaft portion 13 so as to be rotatable relative to the first rotation shaft portion 13 and cannot be removed. Further, the main body portion 17 can be engaged with the second rotation shaft portion 14 so that the treatment portion 6 is in a predetermined mounting direction with respect to the main body portion 17, and with respect to the second rotation shaft portion 14. Detachable.
The main body portion 17 is provided with a guide 18 for defining the moving direction of the annular member 19. In the present embodiment, the guide 18 has a groove formed on the outer surface of the main body portion 17 so as to extend in one direction. A protrusion 20 formed on the annular member 19 enters the groove serving as the guide 18. Thereby, the annular member 19 moves along the groove.

  The annular member 19 is provided separately from the main body portion 17, and binds the main body portion 17 and the second rotation shaft portion 14. That is, a part of the main body part 17 and a part of the second rotating shaft part 14 are both inserted into the annular member 19, and the main body part 17 and the second rotating shaft part 14 are connected by the annular member 19. Bundled together. In addition, the annular member 19 is formed with a protrusion 20 that enters a groove (guide 18) formed in the main body portion 17.

  When the annular member 19 is disposed at a position where the main body portion 17 and the second rotating shaft portion 14 are bound, the treatment portion 6 is connected to the long member 2 (hereinafter referred to as “bound state”). ) Further, when the annular member 19 is disposed at a position away from the position where the main body portion 17 and the second rotating shaft portion 14 are bound, the treatment portion 6 can be removed from the long member 2 (hereinafter referred to as “open”). Will be referred to as a “state”).

  The lock member 21 is provided to switch between the above-described bundling state and open state. The lock member 21 has a groove 22 that can communicate with a groove (guide 18) formed in the main body portion 17. The groove 22 formed in the lock member 21 has a function of regulating the moving direction of the annular member 19 as a part of the guide 18 formed in the main body portion 17.

  The lock member 21 can be rotated around the rotation center of the first rotation shaft portion 13. The lock member 21 rotates the first rotation shaft portion 13 with respect to the main body portion 17 when a predetermined or greater rotational force is applied to the lock member 21 as an external force around the rotation center of the first rotation member. It is relatively rotatable around the center of movement. That is, when the operator rotates the lock member 21, the lock member 21 is rotated relative to the main body portion 17, and the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 The communication state of can be switched. Note that the lock member 21 operates integrally with the main body 17 in a state where the external force for rotating the lock member 21 is not applied.

  When the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 are in communication with each other, the annular member 19 is connected to the groove 22 formed in the lock member 21 and the guide formed in the main body portion 17. 18 can move freely along the line 18. When the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 are not in communication, the annular member 19 cannot enter the groove 22 formed in the lock member 21. For this reason, when the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 are in a non-communication state in the above-described binding state, the treatment portion 6 is connected to the long member 2 as described above. It is kept in a state.

As shown in FIGS. 6 to 9, the opening / closing joint 27 is connected to the opening / closing rod 5 and rotates about the same axis as the first rotation shaft 13, and the first opening / closing gear 23. 23, the opening / closing second gear 24 that rotates about the same axis as the second rotating shaft portion 14, the rack 25 connected to the opening / closing second gear 24, and the link that connects the rack 25 and the forceps piece 7a. It has the element 26a and the link element 26b which connects the rack 25 and the forceps piece 7b.
In the present embodiment, the configuration in which the first opening / closing gear 23 and the second opening / closing gear 24 are brought into frictional contact with the meshing of the gears is shown. Absent. For example, instead of frictional contact by gear meshing, two rubber rollers (which have a large frictional force) that are not in meshing frictional contact with each other, such as a configuration in which two rubber rollers are in frictional contact with each other, do not slip between the two rotating bodies and rotate. It may be a mechanism capable of
In the link elements 26 a and 26 b shown in FIG. 6, the traction force transmitted from the opening and closing rod 5 via the opening and closing first gear 23 and the opening and closing second gear 24 shown in FIG. 7 is transmitted through the rack 25. The link elements 26a and 26b convert the advance / retreat operation of the rack 25 into the opening / closing operation of the forceps pieces 7a and 7b.
In the present embodiment, the link element 25 of the opening / closing joint 27 forms a toggle mechanism, and the gripping force of the forceps pieces 7a, 7b increases exponentially as the forceps pieces 7a, 7b move in the closing direction. It is like that.

  The drive control unit 45 shown in FIG. 1 includes an actuator 46 that moves the connecting rod 3 (the bending rod 4 and the opening / closing rod 5) forward and backward in the longitudinal axis direction of the long member 2, and a detection unit that detects the operation amount of the actuator 46. 47. The drive control unit 45 operates according to the drive signal output from the slave-side control device 112. The detection unit 47 detects the operation amount of the actuator 46 and outputs it to the slave-side control device 112. Thereby, the operation of the actuator 46 in the drive control unit 45 is feedback-controlled.

Next, the operation of the surgical instrument 1 and the medical manipulator 100 according to the present embodiment will be described focusing on the operation principle and action of the surgical instrument 1.
The surgical instrument 1 is used in a state where the treatment portion 6 and the long member 2 are connected to each other at the bending double joint 11 and the opening / closing joint 27. In addition, the surgical instrument 1 can also remove the treatment portion 6 from the long member 2 and attach another treatment portion 6 to the long member 2. For example, it is possible to perform treatment while exchanging different types of treatment units 6, or to replace the treatment unit 6 in which an operation inconvenience or the like has occurred with another new treatment unit 6 to continue the treatment.

First, the operation when using the surgical instrument 1 will be described.
The bending double joint 11 can be operated by the forward / backward movement of the bending rod 4 by the actuator 46. Further, the opening / closing joint 27 can be operated independently of the bending double joint 11 by the forward / backward movement of the opening / closing rod 5 by the actuator 46.

Here, the operation of the bending double joint 11 will be described.
When the bending rod 4 is moved back and forth without moving the opening / closing rod 5 forward and backward, as shown in FIGS. 3 to 5, the second rotating shaft portion 14 turns around the first rotating shaft portion 13 as a turning center. Operate. At this time, since the second fitting tooth portion 15 is engaged with the first fitting tooth portion 12 provided in the bending double joint 11, the second fitting tooth portion 15 has the second rotating shaft portion 14. It rotates as the center of rotation. The second fitting tooth portion 15 rotates around the second rotation shaft portion 14 while the second rotation shaft portion 14 performs a turning operation with the first rotation shaft portion 13 as a turning center. The direction of the pair of forceps pieces 7a and 7b changes. At this time, the pair of forceps pieces 7a and 7b does not open and close.

In this case, in the bending double joint 11, the main body portion 17 is moved at an angle corresponding to the ratio between the radius of the first fitting tooth portion 12 and the radius of the second fitting tooth portion 15.
For example, if the radius of the first fitting tooth portion 12 is r1, the radius of the second fitting tooth portion 15 is r2, the rotation angle of the main body portion 17 is θ, and the rotation angle of the treatment portion 6 is φ,
r2 (φ−θ) = r1θ (1)
φ = {(r1 + r2) / r2} θ (2)
For example, as in the present embodiment, when the ratio of the radius r1 of the first fitting tooth portion 12 and the radius r2 of the second fitting tooth portion 15 is 1: 1 (r1 = r2),
φ = 2θ
It becomes. Therefore, if the main body portion 17 is moved 45 degrees around the first rotation shaft portion 13, the second fitting tooth portion 15 provided on the treatment portion 6 side is 90 degrees with respect to the first fitting tooth portion 12. Will tilt. That is, since it is a speed increasing mechanism, the amount of angular movement of the main body portion 17 can be reduced relative to the amount of angular movement of the treatment portion 6 intended.

Next, an operation when the treatment portion 6 is attached to and detached from the long member 2 will be described.
10 to 14 are perspective views for explaining the attaching / detaching operation of the treatment section 6.
When it is necessary to remove the treatment portion 6 from the long member 2, the lock member 21 is rotated relative to the main body portion 17 to form the groove 22 formed in the lock member 21 and the main body portion 17. The guide 18 is changed from the non-communication state (see FIG. 10) to the communication state (see FIG. 11). This can be easily performed, for example, by inserting a flathead screwdriver into the groove 22 formed in the lock member 21 and turning the lock member 21.

When the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 are in communication with each other, the annular member 19 forms the groove 22 of the lock member 21 from the second rotating shaft portion 14 side. It can pass through and move to the first rotating shaft portion 13 side. As shown in FIG. 12, when the operator moves the annular member 19 toward the first rotation shaft portion 13, the binding between the second rotation shaft portion 14 and the main body portion 17 is released, and FIG. 13 and FIG. As shown in FIG. 14, the second rotating shaft portion 14 and the treatment portion 6 connected to the second rotating shaft portion 14 are detached from the main body portion 17.
In the present embodiment, the treatment section 6 is removed from the long member 2 regardless of the bending state of the bending double joint 11 and the opening / closing joint 27. Can do.

Thereafter, another treatment section 6 can be attached, or the removed treatment section 6 can be washed and attached again.
When the treatment portion 6 is attached to the long member 2, the first fitting tooth portion 12 and the second fitting tooth portion 15 mesh with each other, and the opening / closing first gear 23 and the opening / closing second gear 24 mesh with each other. Then, the treatment portion 6 is positioned, the main body portion 17 is engaged with the second rotation shaft portion 14, and the second rotation shaft portion 14 and the main body portion 17 are bound by the annular member 19. Thereafter, the lock member 21 is rotated with respect to the main body portion 17 so that the groove 22 formed in the lock member 21 and the guide 18 formed in the main body portion 17 are not communicated.
Thereby, the treatment part 6 attached to the long member 2 can be used.

  As described above, according to the surgical instrument 1 and the medical manipulator 100 of the present embodiment, the main body portion 17 and the second rotation shaft portion 14 are bound together by the annular member 19, so that the treatment portion 6 can be configured with a simple configuration. Can be attached to and detached from the long member 2.

  In addition, according to the surgical instrument 1 and the medical manipulator 100 of the present embodiment, the number of components added to make the treatment section 6 detachable is small compared to the technique described in Patent Document 1.

  In addition, since the treatment section 6 and the long member 2 are attached and detached by attachment and detachment between the first rotation shaft section 13 and the second rotation shaft section 14, the orientation of the treatment section 6 is long. The parts of the joint part that change with respect to the scale member 2 can be used for attaching and detaching the treatment portion 6. For this reason, in the operation part and medical manipulator 100 of this embodiment, the number of parts which increase with respect to a structure in case the treatment part 6 is detachable is small.

(Modification 1)
Next, a modification of this embodiment will be described. FIG. 15 is a perspective view showing the configuration of the present modification. FIG. 16 is a perspective view for explaining the operation of this modification.
As shown in FIG. 15, in this modification, instead of the configuration in which the main body portion 17 and the second rotation shaft portion 14 are detachable, the main body portion 17 includes a distal side member 17A and a proximal side member 17B. Can be separated.
As shown in FIGS. 15 and 16, the distal member 17A is formed with a claw portion 48 that engages with the proximal member 17B. The proximal member 17B is formed with a recess 49 into which the claw portion 48 of the distal member 17A enters. The claw portion 48 and the concave portion 49 constitute a locking portion 16 that locks the first rotating shaft portion 13 and the treatment portion 6 in the same manner as the locking portion 16 described in the above embodiment. .

  By pushing the claw portion 48 of the distal side member 17A into the concave portion 49 of the proximal side member 17B, the proximal side member 17B and the distal side member 17A are slightly elastically deformed, and the claw portion 48 is formed in the concave portion 49. Get in. Thereby, the treatment portion 6 is locked to the long member 2.

Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.
Further, in this modification, the number of parts is further smaller than in the above-described embodiment.
In the embodiment including the above-described modified example, the operation of the treatment tool piece has been described by taking the operation of opening and closing the forceps pieces 7a and 7b, which are a pair of treatment tool pieces, as an example, but is not limited thereto. For example, it may be an operation of bending (turning) one treatment tool piece. The treatment tool piece may be a medical instrument other than the forceps piece.

(Modification 2)
Next, another modification of the present embodiment will be described. FIG. 17 is a perspective view showing the configuration of this modification. FIG. 18 is a cross-sectional view for explaining the configuration of this modification.
As shown in FIGS. 17 and 18, in this modification, instead of the treatment portion 6 having the forceps pieces 7 a and 7 b, a treatment portion 6 having an electric knife electrode 50 is provided.
Further, the long member 2 is provided with a lead wire 51 electrically connected to the electrode 50 of the electric knife. The lead wire 51 and the electrode 50 are connected via a plug 52 that detachably connects the lead wire 51 and the electrode 50. In addition, the treatment part 6 of this modification does not need to be connected to the joint 27 for opening / closing, and does not need to have the joint 27 for opening / closing. In this modification, the opening / closing joint 27 and the opening / closing rod 5 may not be provided.
Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, a specific structure is not restricted to this embodiment.
For example, a treatment portion that does not have the second rotation shaft portion and is bent at the first rotation shaft portion may be employed.
The present invention also includes design changes and the like within a scope not departing from the gist of the present invention.

  The present invention can be used as a surgical instrument and a medical manipulator. The field in which the present invention can be used is not limited to the medical field.

DESCRIPTION OF SYMBOLS 1 Surgical tool 2 Long member 3 Connecting rod 4 Bending rod 5 Opening / closing rod 6 Treatment part 7a, 7b Forceps piece 8 Cover 9 Axis member 10 Connection part 11 Bending double joint 12 First fitting tooth part (1st Rolling guide part)
13 1st rotation axis part 14 2nd rotation axis part 15 2nd fitting tooth part (rolling guide part; 2nd rolling guide part)
16 Locking portion 17 Body portion 17A Distal member 17B Proximal member 18 Guide 19 Annular member 20 Protrusion 21 Lock member 22 Groove 23 Opening / closing first gear (first rolling guide portion)
24 Second gear for opening and closing (rolling guide part; second rolling guide part)
25 Rack 26a, 26b Link element 27 Opening / closing joint 45 Drive controller 46 Actuator 47 Detector 48 Claw 49 Recess 50 Electrode 51 Lead wire 52 Plug 100 Medical manipulator 101 Master manipulator 102 Master display unit 103 Operation unit 110 Controller 111 Master side control device 112 Slave side control device 120 Slave manipulator 121 Slave arm

Claims (5)

A surgical instrument for performing treatment on a treatment target site,
A cylindrical elongated member having a longitudinal axis;
A treatment section coupled to the elongated member;
A connecting portion that removably connects the elongated member and the treatment portion;
With
The connecting portion is
A first rotation shaft provided on the elongated member;
A second rotation shaft provided in the treatment section;
A first rolling guide part provided with an arcuate part provided on the elongate member and having a center coaxially with the first rotation shaft part;
A second rolling member having a rolling guide portion provided in the treatment portion and having an arcuate portion having a center coaxially with the second rotation shaft portion, wherein the rolling guide portion is in rolling contact with the first rolling guide portion; A guide part;
A locking portion that locks the first rotation shaft portion and the second rotation shaft portion;
Have
It is attached and detached between the first rotation shaft portion and the second rotation shaft portion ,
The locking portion is
A main body connected to the first rotation shaft and engageable with the second rotation shaft;
An annular member that is provided separately from the main body and binds the main body and the second rotating shaft;
The bundling state in which the annular member is arranged at a position where the main body portion and the second rotating shaft portion are bundled, and the position where the annular member binds the main body portion and the second rotating shaft portion are deviated. A locking member for switching between the open state arranged at the position,
Surgical instrument characterized in that it comprises a. Before SL body portion has a groove that defines a movement direction of said annular member and engaged with the annular member,
The lock member has a part of the groove and is movable relative to the main body part,
When the groove provided in the lock member and the groove provided in the main body portion are in communication with each other, switching between the open state and the bundling state is possible. In the bundling state, the lock member is provided with the lock member. said treatment portion against the long member when the groove and the groove provided in the body portion is a non-communicating state according to claim 1 you, characterized in that it is held by the bundling condition Surgical tool. And operable treatment instrument pieces provided on front Symbol treatment unit,
A treatment tool piece operating joint for connecting the elongated member and the treatment tool piece;
A moving member coupled to the treatment tool piece operating joint for operating the treatment tool piece;
Further comprising
The treatment tool piece operating joint is:
A first rotating member for operation that is connected to the moving member and rotates around a predetermined rotation center;
The second rotation shaft portion is coaxial with the second rotation shaft portion or closer to the rotation shaft portion than the second rotation shaft portion so as to rotate relative to the first rotation member for operation relative to the rotation center. A second rotating member for operation connected to the first rotating member for operation;
A link for converting the rotational force of the second rotating member for operation into the operation of the treatment instrument piece;
Have
The treatment instrument piece operational joint by detachable at the connection portion, characterized in that it is removable between the second pivot member for the operation with the first rotating member for the operation claim 1 or 2. The surgical instrument according to 2 . The treatment instrument piece has a pair, the operation of the treatment instrument piece, surgical instrument of claim 3 you, wherein a closing of a pair of treatment instrument pieces. And surgical instrument according to any one of claims 1 or et 4,
A slave manipulator to which the surgical instrument is attached and having at least one joint;
A master manipulator that issues an operation command for driving the joint of the slave manipulator;
Medical manipulator with

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