JP2005261827A - Treatment tool for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment tool for an endoscope for which a treatment part is easily attached and detached in the case that a treatment unit is freely attachable and detachable and falling from an insertion part of the treatment unit is suppressed at the time of use. <P>SOLUTION: The treatment tool for the endoscope comprises: the treatment unit 3 provided with a treatment part 2 for performing treatment to an object part; the insertion part 5 extended with flexibility; and an attaching and detaching means 6 for connecting the proximal end of the treatment unit 3 and the distal end of the insertion part 5 and regulating the relative movement of the treatment unit 3 to the insertion part 5 in the direction of the center axis C of the insertion part 5 and a turning direction around the center axis C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscope treatment tool.

Conventionally, there are many types of endoscopic treatment tools, which are selected and used in accordance with the application. However, for that purpose, many kinds of treatment tools had to be owned and stored, and management was troublesome.
Various proposals have been made to allow only the treatment unit to be detachably exchanged by rotating the treatment unit at the distal end portion of the treatment instrument relative to the sheath side serving as the insertion portion (for example, Patent Documents 1 and 2). 3).
US Pat. No. 5,368,606 US Pat. No. 5,782,748 German Patent No. G8905099.1

However, since the above-described conventional endoscopic treatment tool connects the treatment unit and the sheath by a rotation mechanism such as a screw or bayonet, if the sheath is rotated after connection, depending on the rotation direction, the distal end There was a possibility that the part would come off.
The present invention has been made in view of the above circumstances, and when the treatment unit is detachable, the treatment unit can be easily attached and detached, and can be prevented from falling off from the insertion portion of the treatment unit during use. It aims at providing the treatment tool for mirrors.

The present invention employs the following means in order to solve the above problems.
An endoscope treatment tool according to the present invention includes a treatment unit having a treatment part for performing treatment on a target site, an insertion part extending with flexibility, a proximal end of the treatment unit, and a distal end of the insertion part And an attachment / detachment means for restricting relative movement of the treatment unit with respect to the insertion portion in a central axis direction of the insertion portion and the treatment unit and a rotation direction around the central axis. A pair of projections provided to protrude outward on both sides across the central axis of either the treatment unit or the insertion portion, and provided on the other of the treatment unit or the insertion portion. A pair of groove portions having openings that can pass through the pair of protrusions in the same direction and extending in a direction perpendicular to the central axis, and having wall portions that lock the pair of protrusions that have passed through the opening. And features that To.

  When the treatment unit and the insertion portion are detachable, this endoscope treatment tool is inserted into the groove portion from the opening side of the pair of groove portions, and moved in the groove portion to the wall portion. By locking, the treatment unit and the insertion portion can be connected. Therefore, even if it is going to move the treatment unit relative to the insertion portion relative to the central axis, the movement can be restricted by engaging the projection with the groove. In addition, even if an attempt is made to rotate the treatment unit about the central axis in a direction in which one protrusion is removed from the opening of one groove, the other protrusion is inserted into the other groove. This can be restricted even if the direction is rotated.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the attachment / detachment means is rotatable about an axis perpendicular to the central axis. A connection member connected to the proximal end side of the insertion portion or the distal end side of the insertion portion, wherein the pair of groove portions are arranged on the connection member.
This endoscope treatment tool confirms the engagement state between the treatment unit and the insertion portion by rotating the connecting member of the attaching / detaching means about the axis in the direction orthogonal to the central axis of the treatment unit and the insertion portion. Both can be connected.

In addition, the endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the connection member biases the pair of protrusions and the pair of grooves in the engaging direction. It is characterized by having a biasing member.
In this endoscope treatment instrument, the projection member and the groove portion are prevented from coming off by preventing the connecting member from rotating around the axis in the direction orthogonal to the central axis of the treatment unit and the insertion portion by the biasing force of the elastic member. Can be suppressed.

  An endoscope treatment tool according to the present invention is the endoscope treatment tool, a treatment unit having a treatment part for performing treatment on a target portion, and an insertion part extending with flexibility. A relative movement of the treatment unit with respect to the insertion portion in a direction of a central axis of the insertion portion and the treatment unit and a rotation direction around the central axis by connecting a proximal end of the treatment unit and a distal end of the insertion portion An attachment / detachment means for regulating the at least one protrusion provided to protrude outward from either the treatment unit or the insertion portion, and any of the treatment unit or the insertion portion. A groove that is provided on the other side and extends through an opening that can pass through the protrusion, and a wall that locks the protrusion that has passed through the opening, and either the treatment unit or the insertion part. Paired with the wall of the groove Characterized in that it includes a regulating portion is disposed at a position to maintain the engagement between said projection portion and the groove.

In this endoscope treatment tool, when the treatment unit and the insertion portion are detachable, the projection portion of the attachment / detachment means is inserted into the opening portion of the groove portion and moved inside the groove portion to be locked to the wall portion. You can connect them with Therefore, even if it is going to move the treatment unit relative to the insertion portion in the direction of the central axis, the movement can be restricted by engaging the projection with the groove.
In addition, when trying to rotate around the central axis, even if one of the protrusions is away from the opening of the groove, the rotation can be restricted by engaging the restricting part. Even if it is turning, this can be regulated.

  ADVANTAGE OF THE INVENTION According to this invention, the treatment unit which can be attached or detached to an insertion part can be easily attached or detached to an insertion part.

A first embodiment according to the present invention will be described with reference to FIGS.
An endoscope treatment tool 1 according to the present embodiment includes a treatment unit 3 having a treatment part 2 for performing treatment on a target site, an insertion part 5 extending with flexibility, and a proximal end of the treatment unit 3. An attachment / detachment means 6 for connecting the distal end of the insertion portion 5 and restricting relative movement of the treatment unit 3 with respect to the insertion portion 5 in the direction of the central axis C of the insertion portion 5 and in the rotation direction around the central axis C is provided. Yes.

As shown in FIG. 1, the treatment unit 3 is connected to a treatment portion main body 7 formed in a cylindrical shape, a tubular portion 8 connected to a proximal end of the treatment portion main body 7, and a proximal end of the treatment portion 2. A link mechanism 10 that converts an axial driving force into an operating force of the treatment section 2 and a transmission member that extends in a rod shape and is connected to the proximal end of the link mechanism 10 to transmit the operating force from the insertion section 5 to the link mechanism 10. 11.
At the end of the transmission member 11, a locking portion 12 that is engageable with the insertion portion 5 and formed in a rectangular plate shape is arranged in a direction in which the plate thickness direction is the same as the axial direction of the transmission member 11. Yes.

  The insertion portion 5 includes a mantle tube 13 and an operation wire (not shown) that can advance and retreat in the mantle tube 13. A pair of projecting portions 15 and 16 formed in a rectangular cross-sectional shape are disposed at the distal end of the outer tube 13 in parallel with each other with the central axis C interposed therebetween. A shaft portion 17A is arranged at the distal end of the operation wire in parallel with the pair of projecting portions 15 and 16, and an engaging portion 17 capable of locking the locking portion 12 is connected to the distal end. The engaging portion 17 has an approximately cross-sectional shape in which the engaging portion 12 can be inserted and engaged with the engaging portion 17 from the outer side in the radial direction of the inserting portion 5 and the direction perpendicular to the opposing direction of the pair of projecting portions 15 and 16. A C-shaped portion 18 is formed.

  As shown in FIGS. 1 and 2, the attaching / detaching means 6 includes a pair of protrusions 20 provided so as to protrude from the side surfaces 15 </ b> A and 16 </ b> A of the pair of protrusions 15 and 16 radially outward from the central axis C. , 21, a rotating shaft 22 disposed in the tubular portion 8 in a direction orthogonal to the central axis C <b> 1 of the treatment unit 3, a connecting member 23 connected to be rotatable about the rotating shaft 22, and a connecting member 23 A pair of projections 20, 21 each having an opening 25 that can pass through the pair of projections 20, 21 in the same direction and extending in a direction perpendicular to the central axis C 1 of the treatment unit 3, and a pair of the passages that have passed through the opening 25. And a pair of grooves 27 and 28 having wall portions 26 for engaging the protrusions 20 and 21.

The connecting member 23 is formed in a substantially C-shaped cross section having a pair of side portions 23A, 23B and a bottom portion 23C on the inner surface.
The pair of side portions 23A and 23B have inner surfaces formed in parallel to each other, and have a width that allows the pair of projecting portions 15 and 16 to be inserted from the opening end 23D side of the connection member 23 to be fitted. At least the opening end 23D is formed to be elastically deformable, the opening width is formed to be narrower than the separation width of the pair of side portions 23A and 23B, and the opening is opened when fitting with the pair of projecting portions 15 and 16 Insertion is possible while widening the end 23D.

Next, the operation method, action, and effect of the endoscope treatment tool 1 according to the present embodiment will be described.
When attaching the treatment unit 3 to the insertion portion 5, first, as shown in FIG. 3, the connecting member 23 is rotated around the rotation shaft 22 in a direction away from the central axis C1, and the locking portion 12 is visible. Then, the engaging portion 12 is inserted into the engaging portion 17 and engaged with the substantially C-shaped section 18 as shown in FIG.
Next, the connecting member 23 is rotated around the rotation shaft 22 in the opposite direction to the above. At this time, the pair of projecting portions 15 and 16 are fitted into the pair of side portions 23A and 23B, and the pair of projecting portions 20 and 21 are inserted into the grooves from the openings 25 of the pair of groove portions 27 and 28, respectively. It is guided by 27 and 28 and moves relatively in the direction of the wall portion 26.
As shown in FIG. 5, each of the protrusions 20 and 21 is locked to the wall portion 26 and the treatment unit 3 and the insertion portion 5 are connected.

  According to the endoscope treatment tool 1, the treatment is performed on the insertion portion 5 by engaging the transmission member 11 and the operation wire, and the treatment portion main body 7 and the outer tube 13 as described above. Even if the unit 3 is relatively moved in the direction of the central axis C, the movement can be restricted by engaging the pair of protrusions 20 and 21 with the grooves 27 and 28. Further, for example, even if an attempt is made to rotate the treatment unit 3 around the central axis C with respect to the insertion portion 5 in a direction in which the projection portion 20 engaged with the opening portion 25 of the groove portion 27 is removed, Therefore, the protruding portion 21 enters the direction, so that the connection state can be maintained by restricting the rotation. The same applies to the reverse direction.

Next, a second embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment mentioned above, and description is abbreviate | omitted.
As shown in FIG. 6, the difference between the second embodiment and the first embodiment is that a connecting member 23 is arranged at the distal end of the outer tube 13 of the endoscope treatment tool 30 according to this embodiment. The tubular portion 31 is connected, and the pair of protruding portions 15 and 16 are connected to the proximal end of the treatment portion main body 7.

The operation method, action, and effect of the endoscope treatment tool 30 will be described.
When attaching the treatment unit 32 to the insertion portion 33, first, as shown in FIG. 6, the connection member 23 is rotated around the rotation shaft 22 to make the engagement portion 17 visible, and the treatment unit 32 is moved. The engaging portion 12 is inserted into the engaging portion 17 and engaged with the substantially C-shaped section 18 as shown in FIG.
Then, similarly to the first embodiment, the connection member 23 is rotated around the rotation shaft 22, and the pair of projecting portions 15 and 16 are inserted into the pair of side portions 23 </ b> A and 23 </ b> B. 21 is engaged with the wall portion 26, and the treatment unit 32 and the insertion portion 33 are connected as shown in FIG.
According to the endoscope treatment tool 30, the same actions and effects as those of the first embodiment can be obtained.

Next, a third embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the third embodiment and the first embodiment is that one of the outer shapes arranged in place of the tubular portion 8 on the proximal end side of the treatment unit 36 of the treatment instrument 35 for an endoscope according to the present embodiment. As shown in FIG. 9, a pair of projecting portions 15 and 16 are connected to the end of the first square portion 37 whose section is square, and the outer shape is rectangular at the tip of the outer tube 13 of the insertion portion 38. The second square portion 40 is connected, and the pair of protrusions 20 and 21 are arranged on the side surfaces 40A and 40B of the second square portion 40, respectively.

The pair of protrusions 15 and 16 are arranged to face each other in a direction orthogonal to the rotation shaft 22, and the locking portion 12 can be moved between the pair of protrusions 15 and 16. The engaging portion 17 can be inserted from the axial direction. In addition, the end portions of the pair of projecting portions 15 and 16 are set to a length that can contact the second rectangular portion 40 when the locking portion 12 and the engaging portion 17 are engaged.
In the first square portion 37, the width of the side surface to which the pair of projecting portions 15 and 16 are connected is substantially the same width as the pair of projecting portions 15 and 16.

Next, an operation method, operation, and effect of the endoscope treatment tool 35 according to the present embodiment will be described.
First, as shown in FIG. 10, the connecting member 23 is rotated around the rotation shaft 22 so that the engaging portion 17 can be inserted between the pair of projecting portions 15 and 16, and the locking portion 12 is paired with the pair of projecting portions. It inserts in the engaging part 17 from the plate | board width direction of the parts 15 and 16, and is engaged by the cross-sectional substantially C-shaped part 18 as shown in FIG.
Next, the connecting member 23 is rotated around the rotation shaft 22 in the opposite direction to the above. At this time, the pair of projecting portions 15 and 16 are fitted into the pair of side portions 23A and 23B, the pair of projecting portions 20 and 21 are inserted into the opening portions 25 of the pair of groove portions 27 and 28, and the groove portions 27 and 28 are inserted. And is locked to the wall portion 26. Thus, the treatment unit 36 and the insertion portion 38 are connected as shown in FIG.
This endoscope treatment tool 35 can also obtain the same operations and effects as those of the other embodiments.

Next, a fourth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fourth embodiment and the first embodiment is that the connecting member 42 of the endoscope treatment tool 41 according to this embodiment includes a pair of protrusions 20 and 21 and a pair of grooves 27 and 28. The spiral spring (biasing member) 43 that biases the connection member 42 in the engaging direction is provided.

The spiral spring 43 is wound around the rotation shaft 22 and has one end 43 a connected to the treatment portion body 7 and the other end 43 b connected to the connection member 42.
On the proximal end side of the connection member 42, a tapered oblique portion 44 is formed from the bottom 42C side toward the opening end 42D side.
The engaging portion 45 includes a pair of leaf spring members 46 and 47 whose base ends are connected to the operation wire and are disposed to face each other, and the distal ends of the pair of leaf spring members 46 and 47 are opposed to each other. The jaw portion 48 is disposed on the upper portion, and a substantially C-shaped section 18 is formed.

Next, the operation method, action, and effect of the endoscope treatment tool 41 according to the present embodiment will be described.
First, the insertion portion 51 is moved along the central axis C direction with respect to the treatment unit 50, and the pair of protrusions 20 and 21 are brought into contact with the oblique portion 44. When the insertion portion 51 is further pressed, the pressing force is converted into the rotational force of the connection member 42 by the oblique portion 44, and the connection member 42 rotates around the rotation shaft 22 in a direction against the spiral spring 43.
If it continues pushing, the latching | locking part 12 and the jaw part 48 of the engaging part 45 will contact | abut, a pair of leaf | plate spring members 46 and 47 will be expanded by the latching | locking part 12, and the latching | locking part 12 will be substantially C-shaped in cross section. Engaged with the shaped part 18.

At this time, since the pair of protrusions 20 and 21 are brought into contact with the pair of grooves 27 and 28 from the oblique portion 44, the spiral spring 43 is restored and the connecting member 42 is pivoted in the direction opposite to the above. Rotate around 22.
Then, as the pair of projecting portions 15 and 16 are inserted into the pair of side portions 42A and 42B, the pair of projecting portions 20 and 21 are guided by the groove portions 27 and 28 and locked to the wall portion 26, The treatment unit 50 and the insertion part 51 are connected.

  According to the endoscope treatment tool 41, the treatment unit 50 and the insertion portion 51 can be connected along the central axis C to be connected to each other. Further, it is possible to suppress the connection member 42 from rotating around the rotation shaft 22 by the urging force of the spiral spring 43 and to prevent the pair of protrusions 20 and 21 and the pair of grooves 27 and 28 from coming off. Can do.

Next, a fifth embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fifth embodiment and the fourth embodiment is that, in the attachment / detachment means 53 of the endoscope treatment tool 52 according to this embodiment, the protrusion 20 is disposed only on the protrusion 15 and the protrusion 16 is provided. The connecting member 55 is formed with a groove portion 27 and a wall portion 26 with which the protrusion portion 20 can be engaged, and the attaching / detaching means 53 is located at a position facing the wall portion 26 of the groove portion 27. This is the point that it is provided with a restricting portion 56 that is disposed and maintains the engaged state between the protruding portion 20 and the groove portion 27.
The restricting portion 56 is formed in a plate shape, extends in the same direction as the connecting member 55, is disposed on the outer peripheral surface of the tubular portion 8, and covers the opening end 55 </ b> D of the connecting member 55.

The operation method, action, and effect of the endoscope treatment tool 52 will be described.
First, similarly to the fourth embodiment, the insertion portion 58 is moved along the central axis C direction with respect to the treatment unit 57 to bring the projection portion 20 into contact with the oblique portion 44 and rotate the connection member 55. The engaging portion 12 and the substantially C-shaped section 18 are engaged with each other.
After the protrusion 20 is brought into contact with the groove 27, the spiral spring 43 is restored and the connection member 55 rotates around the rotation shaft 22 in the opposite direction to the above.
As the pair of protrusions 15 and 16 are inserted into the connection member 55, the protrusion 20 is guided by the groove 27 and locked to the wall 26, and the treatment unit 57 and the insertion part 58 are connected. Is done.

  According to the endoscope treatment tool 52, even if the treatment unit 57 is to be moved relative to the insertion portion 58 in the direction of the central axis C, the movement can be restricted by locking the projection 20 to the groove 27. . Further, when the treatment unit 57 is rotated relatively around the central axis C in the direction in which the protrusion 20 is removed from the opening end 55D of the groove 27, the rotation can be restricted by being locked by the restricting portion 56. This can be regulated by any direction of rotation.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, as shown in FIG. 15, an endoscope treatment tool 61 may be provided that includes a connection member 60 in which the connection member 23 according to the first embodiment is provided with a spiral spring 43.
Further, as shown in FIG. 16, an endoscope treatment tool 62 having a simplified structure by eliminating the rotation shaft 22 may be used.

It is a perspective view which shows the treatment tool for endoscopes in the 1st Embodiment of this invention. (A) AA arrow sectional drawing of FIG. 1, (b) It is explanatory drawing which shows the state which made the connection member and the protrusion part engage in the AA position of FIG. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 1st Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 1st Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 1st Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 2nd Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 2nd Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 2nd Embodiment of this invention. It is a perspective view which shows the treatment tool for endoscopes in the 3rd Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 3rd Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 3rd Embodiment of this invention. It is explanatory drawing which shows the state which connects a treatment unit to an insertion part in the treatment tool for endoscopes in the 3rd Embodiment of this invention. It is a perspective view which shows the treatment tool for endoscopes in the 4th Embodiment of this invention. It is a perspective view which shows the treatment tool for endoscopes in the 5th Embodiment of this invention. It is a perspective view which shows the treatment tool for endoscopes in other embodiment of this invention. It is a perspective view which shows the treatment tool for endoscopes in other embodiment of this invention.

Explanation of symbols

1, 30, 35, 41, 52, 61, 62 Endoscopic treatment tool 2 Treatment unit 3, 32, 36, 50, 57 Treatment unit 5, 33, 38, 51, 58 Insertion unit 6, 53 Detachment means 20 , 21 Protrusions 23, 42, 55, 60 Connecting member 25 Opening 26 Wall 27, 28 Groove 43 Spiral spring (biasing member)
56 Regulatory Department

Claims (4)

A treatment unit having a treatment part for performing treatment on a target site;
An insertion portion extending with flexibility;
The proximal end of the treatment unit and the distal end of the insertion portion are connected to move the treatment unit relative to the insertion portion in the direction of the central axis of the insertion portion and the treatment unit and in the rotation direction around the central axis. A detachable means for regulating,
A pair of protrusions provided so that the attaching / detaching means protrudes outward on both sides across the central axis of either the treatment unit or the insertion part;
The treatment unit or the insertion portion is provided on either the other side and has an opening that can pass through the pair of protrusions in the same direction and extends in a direction perpendicular to the central axis, and passes through the opening. A treatment instrument for an endoscope, comprising: a pair of grooves having wall portions for locking the pair of protrusions. The attaching / detaching means includes a connecting member which is rotatable about an axis perpendicular to the central axis and connected to a proximal end side of the treatment unit or a distal end side of the insertion portion;
The treatment instrument for an endoscope according to claim 1, wherein the pair of groove portions are arranged on the connection member.   The endoscopic treatment tool according to claim 2, wherein the connecting member includes a biasing member that biases the pair of protrusions and the pair of grooves in an engaging direction. A treatment unit having a treatment part for performing treatment on a target site;
An insertion portion extending with flexibility;
The proximal end of the treatment unit and the distal end of the insertion portion are connected to move the treatment unit relative to the insertion portion in the direction of the central axis of the insertion portion and the treatment unit and in the rotation direction around the central axis. A detachable means for regulating,
The attachment / detachment means includes at least one protrusion provided to protrude outward from either the treatment unit or the insertion portion;
A groove portion that is provided on either the treatment unit or the insertion portion and that has an opening that can pass through the protrusion and a wall portion that locks the protrusion that has passed through the opening;
A regulating portion that is disposed at a position facing the wall portion of the other groove portion of either the treatment unit or the insertion portion and maintains the engaged state between the projection portion and the groove portion; An endoscopic treatment tool.

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