JP2017189458A - Treatment tool insertion tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment tool insertion tool, in which workability of a treatment tool operation part is improved by virtue that rotating direction of a treatment tool guide part is uniquely defined along an insertion part of an insertion apparatus.SOLUTION: A treatment tool insertion tool comprises a pipe 21 leading a treatment tool 31 to a treatment tool insertion port 10b; a treatment tool holding part 22 which is arranged along the insertion part 2 and arranged on one end 21a of the pipe 21; a treatment tool operation part 23 movably arranged along an extending direction E onto the treatment tool holding part 22; and an equipment mouth metal 24 on which a hole is formed, whose periphery corresponds to a shape of an end surface of a treatment tool insertion port metal having a non point symmetric plane shape with respect to the center of the treatment tool insertion port 10b, in which the hole may be attached/detached onto the treatment tool insertion port metal, and which is arranged on the other end 21b of the pipe 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a treatment instrument insertion tool that is attached to an insertion portion of an insertion device to be inserted into a subject and inserts a treatment tool from a treatment tool insertion port of the insertion device into the subject through the insertion portion.

  In recent years, an insertion device inserted into a subject, for example, an endoscope, has been widely used in the medical field.

  An endoscope used in the medical field observes an organ in a body cavity by inserting a long and thin insertion portion into a body cavity as a subject, and in a treatment instrument insertion path provided in the endoscope as necessary. Various treatments can be performed on a target site of an organ in a body cavity (hereinafter referred to as a treatment target site) using the inserted treatment tool.

  When observing the body cavity, the operator, for example, grasps the insertion portion of the endoscope with the right hand and performs various operations of the insertion portion while observing the endoscope image, A technique for performing various operations on the operation unit of the mirror is common.

  Further, when performing treatment on the treatment target site in the body cavity, the operator once removes the right hand from the insertion portion, and then grasps the treatment tool with the right hand and passes the treatment tool insertion port provided in the operation portion. In general, a procedure is performed in which a treatment tool is inserted into the treatment tool insertion passage, and various treatments are performed by projecting the treatment tool from the distal end opening of the treatment tool insertion passage formed at the distal end of the insertion portion into the subject.

  Here, when performing various treatments on the treatment target site in the body cavity using the treatment tool, the operator inserts the treatment target site while observing the endoscopic image in order to perform appropriate treatment. This necessitates fine adjustment of the distal end position of the section and the distal end position of the treatment instrument.

  However, as described above, the surgeon selectively performs various operations on the insertion portion and various operations on the treatment tool with the right hand, so that the distal end position of the insertion portion and the distal end position of the treatment tool with respect to the treatment target site are minute. There was a problem that it was difficult to make adjustments at the same time.

  In addition, as described above, since the operator must perform various operations of the treatment tool performed with the right hand while moving the right hand away from the insertion portion, the operator performs fine adjustment of the distal end position of the treatment tool with respect to the treatment target site. There is also a problem that the position of the distal end of the insertion portion with respect to the treatment target site is shifted.

  In view of such a problem, Patent Document 1 discloses a cylindrical treatment instrument guide portion whose other end can be freely inserted into a treatment instrument insertion port provided in the operation portion, and one end of the treatment instrument guide portion. The treatment tool is inserted into the subject, and includes a treatment tool holding portion configured to hold the treatment tool and be held by the operator together with the insertion portion of the endoscope. A treatment instrument insertion tool is disclosed.

  In the treatment instrument insertion tool disclosed in Patent Document 1, the treatment instrument holding portion is attached to a portion of the insertion portion located outside the subject, and the other end of the treatment instrument guide portion is inserted into the treatment instrument insertion port. The treatment instrument is inserted into the treatment instrument insertion path via the insertion opening of the treatment instrument holding part and the treatment instrument guide part. Thereafter, in a state where the treatment tool protrudes from the distal end opening at the distal end of the insertion portion into the subject, the operator operates the treatment tool such as a slider provided on the treatment tool holding portion with the right hand while holding the insertion portion with the right hand. The position of the treatment tool is adjusted using the unit. From this, the surgeon can simultaneously fine-tune the distal end position of the insertion portion and the distal end position of the treatment tool with respect to the treatment target site only with the right hand.

International Application Publication No. WO2013 / 065509

  Here, in the treatment instrument insertion tool disclosed in Patent Document 1, in order to make the movement direction of the treatment instrument in the treatment instrument insertion path along the extending direction of the insertion portion coincide with the movement direction of the treatment instrument operation portion. The one end of the treatment instrument guide part is on the side in the insertion direction of the insertion part (hereinafter referred to as the front) with respect to the treatment instrument holding part mounted on the insertion part (hereinafter referred to as the distal end side of the treatment instrument holding part). It is connected to the. That is, the treatment instrument is inserted into the insertion opening of the treatment instrument holding portion from the opposite direction to the front (hereinafter referred to as rear) side toward the front.

  Therefore, in the configuration in which one end of the treatment instrument guide unit is connected to the distal end side of the treatment instrument holding unit, the treatment instrument insertion port into which the other end of the treatment instrument guide unit is inserted is located behind the treatment instrument holding unit. Therefore, there is a problem that the treatment instrument guide section has to be formed long and not only a large loop shape can be formed but also the treatment instrument guide section is poorly handled.

  In view of such a problem, one end of the treatment instrument guide portion is connected to the rear side of the treatment instrument holding portion (hereinafter referred to as a proximal end side of the treatment instrument holding portion), the treatment instrument guide portion is shortened, and the treatment instrument is provided. A configuration that improves the handling of the treatment instrument guide portion by arranging the guide portion along the insertion portion is also conceivable.

  However, in the treatment instrument insertion tool disclosed in Patent Document 1, the other end of the treatment instrument guide is simply inserted into the treatment instrument insertion port. The end will rotate.

  In addition to this, when the treatment instrument guide section is formed of a flexible tube or the like, the treatment instrument guide section has a curl. From this, when the other end of the treatment instrument guide portion rotates, the position of the treatment instrument guide portion on the outer periphery of the insertion portion (hereinafter referred to as the direction of the treatment instrument guide portion in the rotation direction with respect to the insertion portion). It becomes difficult to uniquely determine and arrange the treatment instrument guide portion along the insertion portion. Therefore, there has been a problem that the operability of the treatment instrument operation unit is lowered.

  The above-mentioned problem is the same in a configuration in which a mounting portion having a base shape provided at the other end of the treatment tool guide portion is attached to a treatment tool insertion base having a treatment tool insertion port.

  Even if the mounting part is mounted and fixed on the treatment instrument insertion base, if the fixing direction of the mounting part in the rotation direction relative to the treatment tool insertion base cannot be uniquely defined, the mounting part is fixed in an appropriate direction. Otherwise, it is difficult to define the direction of the rotation direction of the treatment instrument guide portion relative to the insertion portion.

  The present invention has been made in view of the above-described problems, and the operability of the treatment instrument operation section is improved by being able to uniquely arrange the treatment instrument guide section along the insertion section of the insertion device with the rotational direction uniquely defined. It is an object of the present invention to provide a treated instrument insertion tool.

  In order to achieve the above object, a treatment instrument insertion tool according to an aspect of the present invention is provided along an insertion portion of an insertion instrument inserted into a subject, and the treatment instrument insertion of a treatment instrument insertion cap provided in the insertion instrument is performed. A treatment instrument insertion tool that is inserted from the mouth into the subject via the insertion section, the treatment instrument being guided to the treatment instrument insertion port, and a treatment instrument guide section that is attached to the insertion section. A treatment instrument holding portion for holding the treatment instrument provided at one end of the treatment instrument guide portion, and a treatment instrument provided movably along the extending direction of the insertion portion with respect to the treatment instrument holding portion A hole having a shape corresponding to the outer periphery is formed with respect to the shape of the end surface of the treatment instrument insertion mouthpiece having an asymmetrical plane shape with respect to the center of the operation portion and the treatment instrument insertion opening, and the hole Is detachable from the treatment instrument insertion base, To anda mounting portion provided at the other end of the treatment instrument guide unit.

  According to the present invention, it is possible to provide a treatment instrument insertion tool in which the operability of the treatment instrument operation section is improved by arranging the treatment instrument guide section with the rotational direction uniquely defined along the insertion section of the insertion device. be able to.

The figure which shows the treatment tool penetration tool of this Embodiment with an endoscope The figure which shows schematically the connection part which attaches a treatment tool guide part with respect to the insertion part of FIG. The partial perspective view which shows roughly the treatment tool insertion base from which the mounting base of the treatment tool insertion tool of FIG. 1 was removed with the operation part of an endoscope The top view which shows the engagement surface by the side of the treatment tool insertion port of the mounting base of FIG. The top view of the engagement surface which shows the modification of the shape of the hole formed in the engagement surface of FIG. The figure which shows roughly the modification with which the parameter | index was provided in the outer surface of the attachment nozzle | cap | die of FIG. 1 with a part of tube. The top view which shows the modification of the end surface shape of the treatment tool penetration cap of FIG. The top view which shows the modification of the hole shape of the engaging surface of the mounting nozzle | cap | die of FIG. The top view which shows the modification different from FIG. 7 of the end surface shape of the treatment tool insertion cap of FIG. The top view which shows the modification different from FIG. 8 of the hole shape of the engaging surface of the mounting base of FIG. The top view which shows the modification different from FIG. 7, FIG. 9 of the end surface shape of the treatment tool insertion cap of FIG. FIG. 8 is a plan view showing a modification of the hole shape of the engagement surface of the mounting base shown in FIG. The top view which shows the modification different from FIG.7, FIG.9, FIG.11 of the end surface shape of the treatment tool insertion cap of FIG. FIG. 8 is a plan view showing a modified example of the hole shape of the engagement surface of the mounting base shown in FIG. 4 different from those shown in FIGS. The top view which shows the modified example different from FIG.7, FIG.9, FIG.11, FIG. 13 of the end surface shape of the treatment tool penetration cap of FIG. FIG. 8 is a plan view showing a modified example of the hole shape of the engagement surface of the mounting base shown in FIG. 4 different from those shown in FIGS. The partial perspective view which shows schematically the modification by which the planar shape of the end surface of the treatment tool penetration cap of FIG. 3 was formed circularly with the operation part of an endoscope FIG. 17 is a partial perspective view schematically showing a state in which the fixing tool is mounted on the projecting portion of the operation unit in FIG. 17 together with the operation unit of the endoscope. The partial perspective view which expands and shows the site | part enclosed by the XIX line in FIG. The top view which looked at the fixing tool of FIG. 19 from the IIX direction in FIG. The fragmentary perspective view which shows the modification of the fixing tool of FIG. 18 roughly with the operation part of an endoscope The side view which looked at the fixture of FIG. 21 from the IIXII direction in FIG. 21 with the other end side of the tube The fragmentary perspective view which shows roughly the modification with which the adapter was mounted | worn with the treatment tool penetration base of FIG. 17 with the operation part of an endoscope. The perspective view which expands and shows the adapter of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the insertion device will be described using an endoscope as an example.

  FIG. 1 is a view showing the treatment instrument insertion tool of the present embodiment together with an endoscope, and FIG. 2 is a view schematically showing a connection portion for attaching a treatment tool guide portion to the insertion portion of FIG.

  As shown in FIG. 1, an endoscope 1 as an insertion device includes an insertion portion 2 to be inserted into a subject, a proximal end side in the extending direction E of the insertion portion 2 (hereinafter simply referred to as a proximal end side). The main part is composed of an operation unit 3 provided continuously to the operation unit 3, a universal cord 8 extending from the operation unit 3, and a connector 9 provided at an extension end of the universal cord 8. ing. Note that the endoscope 1 is electrically connected to an external device such as a control device or a lighting device via the connector 9.

  The operation section 3 is provided with an up / down bending operation knob 4 for bending the bending section 2w of the insertion section 2 in the up / down direction and a left / right bending operation knob 6 for bending the bending section 2w in the left / right direction.

  Further, the operation unit 3 is provided with a fixed lever 5 that fixes the rotation position of the up / down bending operation knob 4 and a fixed knob 7 that fixes the rotation position of the left / right bending operation knob 6. The operation unit 3 is provided with various known operation switches.

  The various knobs 4, 6, 7, lever 5, various switches and the like provided in the operation unit 3 are operated by the left hand of the operator, for example.

  The insertion portion 2 includes a distal end portion 2s, a bending portion 2w, and a flexible tube portion 2k in order from the distal end side in the extending direction E (hereinafter simply referred to as the distal end side), and is formed in an elongated shape. ing. The insertion unit 2 is operated by, for example, the operator's right hand.

  Contrary to the above, various operations of the insertion unit 2 may be performed with the left hand of the operator and various operations of the operation unit 3 may be performed with the right hand of the operator.

  The bending portion 2w is bent in, for example, four directions, up, down, left, and right, by a turning operation of the up / down bending operation knob 4 or the left / right bending operation knob 6, so that an imaging unit (not shown) provided in the distal end portion 2s is provided. The observation direction can be changed, or the insertability of the tip 2s in the subject can be improved. Furthermore, the flexible tube portion 2k is connected to the proximal end side of the bending portion 2w.

  Further, a treatment instrument insertion passage 10 is provided in the insertion portion 2 and the operation portion 3. One end of the treatment instrument insertion passage 10 is opened as a distal end opening 10a on the distal end surface of the distal end portion 2s. Further, the other end is opened as a treatment instrument insertion port 10b on an end surface 40t (both see FIG. 3) of the treatment instrument insertion base 40 projecting from the projection part 3t in the extension portion 3t provided in the operation unit 3. .

  In addition, since the structure of the other endoscope 1 is the same as the structure of a general endoscope, the detailed description is abbreviate | omitted.

  The treatment tool insertion tool 20 is attached to the insertion portion 2 and allows a treatment tool 31 for treating the inside of the subject to be inserted into the subject from the treatment tool insertion port 10b through the treatment tool insertion passage 10.

  In the present embodiment, the case where there is only one treatment instrument is shown as an example. However, the treatment instrument insertion instrument 20 selectively inserts a plurality of treatment instruments or a plurality of types of treatment instruments into the subject. It doesn't matter if you do it.

  The treatment instrument insertion tool 20 includes a tube 21 that is a treatment instrument guide, a treatment instrument holding section 22 that holds the treatment instrument, a treatment instrument operation section 23, and a mounting base 24 that is a mounting section. The main part is composed.

  The tube 21 is a cylindrical member that guides the treatment instrument 31 to the treatment instrument insertion port 10b, and is made of a resin such as Teflon (registered trademark).

  Specifically, the tube 21 is provided with a detachable attachment base 24 at the other end 21b of the treatment instrument insertion base 40 (see FIG. 3), and one end 21a is connected to the proximal end side of the treatment instrument holding portion 22. ing.

  After the mounting base 24 is attached to the treatment instrument insertion base 40 (see FIG. 3), the tube 21 is replaced with the treatment instrument 31 inserted into the tube 21 from the treatment instrument holding portion 22 into the treatment instrument insertion port 10b and the treatment. It is guided into the subject by projecting from the tip opening 10a into the subject through the instrument insertion passage 10.

  As shown in FIG. 2, the tube 21 is inserted by the connecting portion 30 so as to extend from the treatment instrument holding portion 22 along the insertion portion 2, that is, along the insertion portion 2. It may be attached to the flexible tube portion 2k.

  As a result, the tube 21 is prevented from being loosened away from the insertion portion 2. In this case, the connection portion 30 is attached to the insertion portion 2 so as to be movable in the extending direction E.

  Further, as shown in FIG. 1, a bent portion 21 m that is bent by approximately 180 ° may be formed in advance on the other end 21 b side of the tube 21.

  According to this, after the attachment base 24 is attached to the treatment instrument insertion base 40 (see FIG. 3), the tube 21 is moved along the flexible tube portion 2k of the insertion portion 2 by the bending portion 21m. The position in the rotation direction at 2k can be uniquely defined and easily followed.

  The treatment instrument holding portion 22 is provided on the one end 21 a side of the tube 21. Further, the treatment instrument holding unit 22 is provided, for example, at a site 2z shown in FIG. 1 that is located outside the subject in the flexible tube portion 2k of the insertion unit 2 when the insertion unit 2 is inserted into the subject. .

The treatment instrument holding portion 22 is provided along the insertion portion 2 (adjacent to the insertion portion 2) so as to be detachable from the site 2z.
With this configuration, the operator can grasp the treatment instrument holding portion 22 together with the insertion portion 2. In addition, the treatment instrument holding unit 22 is configured not to drop off from the part 2z after being attached to the part 2z located outside the subject.

  Furthermore, the treatment instrument holding unit 22 communicates with the inside of the tube 21 and has a space in which the treatment instrument 31 passes and a part of the treatment instrument operation unit 23 is located, and the distal end of the space is a treatment to the space The insertion port 22p of the tool 31 is comprised.

  In other words, the insertion port 22p is directed to the front E1, which is the insertion direction of the insertion section 2 into the subject in the extending direction E when the treatment instrument holding section 22 is attached to the insertion section 2.

  The treatment instrument operation unit 23 is provided so as to be movable along the extending direction E with respect to the treatment instrument holding unit 22, and a part thereof is movable along the extending direction E within the treatment instrument holding unit 22. It has become.

  That is, the treatment tool operation unit 23 is operated by the surgeon in a state where a portion extended from the treatment tool holding unit 22 through a slit (not shown) provided in the treatment tool holding unit 22 is grasped by the surgeon. It is configured to be movable in the extending direction E.

  It should be noted that the treatment instrument operating section 23 is movable forward E1 and rearward E2 (hereinafter referred to as front and rear) in the extending direction E, so that the tube 21 can be formed by a known configuration provided in the treatment instrument holding section 22. It can be moved back and forth in the extending direction E.

  Therefore, as shown in FIG. 1, the operator can insert the insertion portion with, for example, the right hand while observing the endoscopic image in a state where the distal end 31 s of the treatment instrument 31 protrudes from the distal end opening 10 a into the subject. 2, the treatment instrument operating unit 23 is moved back and forth in the extending direction E with the right hand along the extending direction E, so that the position of the distal end side of the treating instrument 31 protruding into the subject is adjusted. Fine adjustments can be made.

  Further, at the same time, the operator can finely adjust the position of the distal end portion 2s of the insertion portion 2 with the right hand while observing the endoscopic image.

  The mounting base 24 has, for example, a substantially cylindrical outer shape and is provided at the other end 21b of the tube 21 and is detachable from the treatment instrument insertion base 40 (see FIG. 3) as described above. When the attachment base 24 is attached to the treatment instrument insertion base 40, the inside of the tube 21 and the treatment instrument insertion opening 10b communicate with each other.

  Next, the shape of the end face 40t of the treatment instrument insertion base 40 and the configuration of the mounting base 24 will be described with reference to FIGS.

  3 is a partial perspective view schematically showing the treatment instrument insertion base from which the attachment base of the treatment instrument insertion tool of FIG. 1 is removed together with the operation part of the endoscope, and FIG. 4 is a treatment of the attachment base of FIG. It is a top view which shows the engagement surface by the side of a tool insertion port.

  5 is a plan view of the engagement surface showing a modification of the shape of the hole formed in the engagement surface of FIG. 4, and FIG. 6 is a modification in which an indicator is provided on the outer surface of the mounting base of FIG. FIG. 2 schematically illustrates an example with a portion of a tube.

  As shown in FIG. 3, the treatment instrument insertion base 40 is provided in the overhanging portion 3t so as to protrude from the upper surface 3tj of the overhanging portion 3t of the operation portion 3, and the treatment tool insertion port 10b is opened in the end surface 40t. Yes.

  Further, the end face 40t is formed in a planar shape that is asymmetric with respect to the center of the end face 40t, for example, a planar shape in which a convex portion 40d protruding outward in the radial direction K is provided on a circular outer periphery.

As shown in FIG. 4, the mounting base 24 has a shape corresponding to the outer periphery with respect to the shape of the end surface 40 t of the treatment instrument insertion base 40 having a plane shape that is asymmetric with respect to the center of the treatment instrument insertion opening 10 b. A hole 28 is formed.
More specifically, the mounting base 24 has an asymmetric planar shape with respect to the center 24c of the engaging surface 24t on the engaging surface 24t on the treatment instrument insertion port 10b side, and the outer periphery corresponds to the shape of the end surface 40t. A hole 28 having the shape described above is formed.

  The shape of the hole 28 whose outer periphery corresponds to the shape of the end surface 40t is a shape in which the outer periphery shape and the outer periphery size of the hole 28 match or substantially match the outer periphery shape and the outer periphery size of the end surface 40t. It is.

  For example, when the hole 28 is formed in a planar shape in which the end surface 40t is provided with the convex portion 40d protruding outward in the radial direction K on the outer periphery of the circle as described above, the convex portion is formed as shown in FIG. It has a planar shape with an outer periphery corresponding to 40d, specifically, a planar shape in which a convex portion 28d protruding outward is provided on a circular outer periphery.

  That is, in the engagement surface 24t, the hole 28 is formed in a planar shape in which the outer periphery of the end surface 40t is fitted.

  The hole 28 can be freely attached to and detached from the treatment instrument insertion base 40 as the mounting base 24 is attached to and detached from the treatment instrument insertion base 40.

  In addition, the hole 28 is formed in an asymmetrical shape if the hole 28 is formed in a point-symmetrical shape, the hole 28 is 180 ° opposite to the treatment instrument insertion base 40 in the rotation direction. In addition to being able to be locked, the hole 28 is locked with respect to the treatment instrument insertion base 40 and then prevented from rotating.

  As shown in FIG. 5, the hole 28 may have a shape having a slit 28 s as long as the outer shape corresponds to the convex portion 40 d.

  Further, as shown in FIG. 6, the convex portion 40 d is formed on the outer surface of the mounting base 24 so that the surgeon can easily recognize the mounting direction in the rotational direction of the mounting base 24 with respect to the treatment instrument insertion base 40. An indicator 90 indicating the direction may be formed.

  In addition, since the structure of the other treatment tool insertion tool 20 is the same as the past, the description is abbreviate | omitted.

  Thus, in the present embodiment, in the mounting base 24 provided at the other end 21b of the tube 21 of the treatment instrument insertion tool 20 that is detachable from the treatment instrument insertion base 40, the engagement surface 24t is engaged with the engagement surface 24t. It has been shown that a hole 28 having a planar shape that is asymmetric with respect to the center 24c of the surface 24t and having an outer periphery corresponding to the shape of the end surface 40t is formed.

  According to this, after the hole 28 is locked to the treatment instrument insertion base 40, the attachment base 24 rotates with respect to the treatment instrument insertion base 40. It is prevented by the combination.

  Therefore, since the position of the mounting base 24 in the rotation direction with respect to the treatment instrument insertion base 40 can be uniquely defined, the rotation of the tube 21 with respect to the insertion portion 2 after the attachment base 24 is attached to the treatment instrument insertion base 40. The position in the moving direction can be uniquely defined.

  From the above, it is possible to provide the treatment instrument insertion tool 20 in which the operability of the treatment instrument operation section 23 is improved by arranging the tube 21 along the insertion section 2 with the rotation direction uniquely defined.

  Hereinafter, a modification will be described with reference to FIGS. FIG. 7 is a plan view showing a modification of the end face shape of the treatment instrument insertion cap of FIG. 3, and FIG. 8 is a plan view showing a modification of the hole shape of the engagement surface of the fitting base of FIG.

  In the present embodiment described above, the hole 28 has a planar shape that is asymmetric with respect to the center 24c of the engagement surface 24t, and the outer periphery corresponds to the shape of the end surface 40t. It was shown to have.

  Specifically, as shown in FIG. 4, when the hole 28 is formed in a planar shape in which the end face 40 t is provided with a convex portion 40 d protruding outward on a circular outer periphery as shown in FIG. 3. It has been shown that it has a planar shape in which the outer periphery corresponds to the convex portion 40d, specifically, a planar shape in which a convex portion 28d protruding outward is provided on a circular outer periphery.

  Not limited to this, the hole 28 may have a planar shape that is asymmetric with respect to the center 24c of the engagement surface 24t, and the outer periphery of the hole 28 corresponds to the shape of the end surface 40t. For example, as shown in FIG. 7, when the end face 40t is formed in a planar shape having a circular outer periphery provided with a recess 40b recessed in the radial direction K, as shown in FIG. May be formed in a planar shape in which a concave portion 28b that is recessed inward is provided on a circular outer periphery.

  The effect similar to that of the above-described embodiment can be obtained also by the shape of the hole 28.

  Hereinafter, another modification will be described with reference to FIGS. 9 and 10. 9 is a plan view showing a modified example of the end face shape of the treatment instrument insertion cap of FIG. 3 different from FIG. 7, and FIG. 10 is a modified drawing different from FIG. 8 of the hole shape of the engagement surface of the mounting base of FIG. It is a top view which shows an example.

  Further, if the hole 28 has a planar shape that is asymmetrical with respect to the center 24c of the engagement surface 24t on the engagement surface 24t, and the outer periphery corresponds to the shape of the end surface 40t, FIG. As shown in FIG. 10, when the end surface 40t is formed in a planar shape having a first portion 40h having a non-arc shape only at one location and a second portion 40e having an arc shape as shown in FIG. Furthermore, a planar shape corresponding to the outer periphery of the first portion 40h and the second portion 40e, specifically, a first portion 28h having only one non-arc shape and a second portion 28e having an arc shape, You may form in the planar shape which has.

  The effect similar to that of the above-described embodiment can be obtained also by the shape of the hole 28.

  Furthermore, another modification will be described below with reference to FIGS. 11 is a plan view showing a modified example different from FIGS. 7 and 9 of the end face shape of the treatment instrument insertion base of FIG. 3, and FIG. 12 is a view of the hole shape of the engagement surface of the mounting base of FIG. It is a top view which shows the modification different from FIG.

  Further, if the hole 28 has a planar shape that is asymmetrical with respect to the center 24c of the engagement surface 24t on the engagement surface 24t, and the outer periphery corresponds to the shape of the end surface 40t, FIG. 11, when the end face 40t is formed in a planar shape having a rectangular portion 40k and a circular portion 40c, as shown in FIG. 12, the planar shape corresponding to the outer periphery of the rectangular portion 40k and the circular portion 40c, Specifically, it may be formed in a planar shape having a rectangular portion 28k and a circular portion 28c.

  The effect similar to that of the above-described embodiment can be obtained also by the shape of the hole 28.

  Hereinafter, another modification will be described with reference to FIGS. 13 and 14. 13 is a plan view showing a modified example of the end face shape of the treatment instrument insertion base shown in FIG. 3, which is different from FIGS. 7, 9, and 11. FIG. 14 shows the hole shape of the engagement face of the mounting base shown in FIG. It is a top view which shows the modification different from FIG.8, FIG.10, FIG.12.

  Further, if the hole 28 has a planar shape that is asymmetrical with respect to the center 24c of the engagement surface 24t on the engagement surface 24t, and the outer periphery corresponds to the shape of the end surface 40t, FIG. 13, when the end surface 40t is formed in a planar shape having a rectangular portion 40k, a circular portion 40c, and a connecting portion 40r, as shown in FIG. 14, the rectangular portion 40k, the circular portion 40c, and the connecting portion 40r. The outer periphery may correspond to a planar shape, specifically, a planar shape having a rectangular portion 28k, a circular portion 28c, and a connecting portion 28r.

  The effect similar to that of the above-described embodiment can be obtained also by the shape of the hole 28.

  Furthermore, another modification will be described below with reference to FIGS. 15 and 16. 15 is a plan view showing a modified example of the end face shape of the treatment instrument insertion base shown in FIG. 3 different from those shown in FIGS. 7, 9, 11, and 13, and FIG. 16 shows an engagement surface of the mounting base shown in FIG. It is a top view which shows the modification different from FIG.8, FIG.10, FIG.12 and FIG. 14 of a hole shape.

  Further, if the hole 28 has a planar shape that is asymmetrical with respect to the center 24c of the engagement surface 24t on the engagement surface 24t, and the outer periphery corresponds to the shape of the end surface 40t, FIG. As shown in FIG. 16, when the end surface 40t is formed in a planar shape having a circular portion 40c and a triangular portion 40s protruding in a triangular shape outward in the radial direction K from the circular portion 40c, as shown in FIG. A planar shape having outer peripheries corresponding to the circular portion 40c and the triangular portion 40s, specifically, a planar shape having a circular portion 28c and a triangular portion 28n protruding in a triangular shape outwardly in the radial direction K from the circular portion 28c. It may be formed.

  The effect similar to that of the above-described embodiment can be obtained also by the shape of the hole 28.

  The holes 28 are not limited to the shapes shown in FIGS. 4, 5, 8, 10, 12, 14, and 16 illustrated above. Of course, any shape may be used as long as it has a plane shape that is asymmetric with respect to the center 24c and has a shape corresponding to the shape of the end face 40t.

  Hereinafter, another modification will be described with reference to FIGS. 17 is a partial perspective view schematically showing a modification in which the planar shape of the end face of the treatment instrument insertion base shown in FIG. 3 is circular, together with the operation part of the endoscope, and FIG. 18 is an operation part shown in FIG. FIG. 19 is a partial perspective view schematically showing a part surrounded by the XIX line in FIG. 20 is a plan view of the fixture of FIG. 19 as viewed from the IIX direction in FIG.

  In the present embodiment described above, as shown in FIG. 3, the end surface 40t of the treatment instrument insertion base 40 has a planar shape that is asymmetric with respect to the center of the end surface 40t, for example, a circular outer periphery in the radial direction K. It was shown that it was formed in the planar shape provided with the convex part 40d which protrudes outside.

  However, normally, in an endoscope, the end surface 40t ′ of the treatment instrument insertion base 40 ′ is formed in a circular shape or a planar shape having a point-symmetric outer periphery with respect to the center of the end surface 40t ′ as shown in FIG. It is common that

  Therefore, even when the end face 40t ′ is formed in a circular planar shape, after the mounting base 24 is mounted on the treatment instrument insertion base 40 ′, the position of the mounting base 24 in the rotational direction with respect to the treatment instrument insertion base 40 ′. There has been a demand for a configuration that can uniquely define the above.

  Therefore, as shown in FIGS. 18 and 19, a fixing tool 50 whose outer shape is formed in a downward U-shape may be provided on the mounting base 24 ′ provided at the other end 21 b of the tube 21. In addition, as the fixture 50, a known clip-shaped clamping member is mentioned.

  Further, in the present modification, as shown in FIG. 20, the planar shape of the outer periphery of the hole 28 ′ of the mounting base 24 ′ has a circular shape so that the outer periphery corresponds to the shape of the end surface 40t ′. . The definition of the shape of the hole 28 ′ whose outer periphery corresponds to the end face 40 t ′ is the same as the definition described for the hole 28.

  The fixing tool 50 is fitted into the U-shaped interior 50i of the fixing tool 50 by fitting a part of the protruding portion 3t on the upper surface 3tj side of the operating portion 3, that is, on the upper surface 3tj side of the protruding portion 3t. In this case, the attachment base 24 ′ is attached to the treatment instrument insertion base 40 ′ by being fixed.

  Further, as shown in FIGS. 19 and 20, both sides of the upper surface are placed on the surface of the fixture 50 that faces the upper surface 3tj of the overhanging portion 3t, that is, the surface 50t that fits the overhanging portion 3t and then comes into contact with the upper surface 3tj. The taper part 50p which fits into the taper part 3tp is formed.

  Thereby, the fixing direction of the fixing tool 50 with respect to the overhanging portion 3t is uniquely defined by the fitting of the tapered portion 50p with the tapered portion 3tp.

  Therefore, it is possible to prevent the fixture 50 from being fitted or rotated 180 ° opposite to the overhanging portion 3t in the rotation direction. That is, the attachment base 24 is prevented from being attached or rotated 180 ° opposite to the treatment instrument insertion base 40 ′ in the rotation direction.

  Other configurations are the same as those of the present embodiment described above.

  According to such a configuration, even if the planar shape of the outer periphery of the end surface 40t ′ of the treatment instrument insertion base 40 ′ has a general circular shape, the same effects as those of the present embodiment described above can be obtained. .

  Further, as in the present embodiment described above, the endoscope 1 including the treatment instrument insertion base 40 in which the end surface 40t is formed in a plane shape that is asymmetric with respect to the center of the end surface 40t is facilitated separately. There is no need.

  Hereinafter, another modification will be described with reference to FIGS. FIG. 21 is a partial perspective view schematically showing a modification of the fixture shown in FIG. 18 together with the operation portion of the endoscope. FIG. 22 shows the fixture shown in FIG. 21 together with the other end of the tube in FIG. It is the side view seen from the IIXII direction.

  As shown in FIGS. 21 and 22, the fixture 60 provided at the other end 21 b of the tube 21 may be formed in a shape that covers the entire overhanging portion 3 t of the operation unit 3. In addition, as the fixture 60, a cap-shaped member is mentioned.

  That is, the fixing tool 60 is fitted into and fixed to the overhanging portion 3t by fitting the entire overhanging portion 3t of the operating portion 3 into the inside 60i of the fixing device 60, so that the mounting base 24 'is attached to the treatment tool insertion base. It has the structure with which 40 'is mounted | worn. Thereby, the fixing direction of the fixing tool 60 is uniquely defined with respect to the overhanging portion 3t.

  Therefore, the fixture 60 is prevented from being fitted or rotated 180 ° opposite to the overhanging portion 3t in the rotation direction. That is, the attachment base 24 ′ is prevented from being attached or rotated 180 ° opposite to the treatment instrument insertion base 40 ′ in the rotation direction.

  In addition, the structure of another fixing tool is the same as FIGS. 17-20 mentioned above. Even with such a configuration, the same effects as in FIGS. 17 to 20 can be obtained.

  Furthermore, another modification will be described below with reference to FIGS. FIG. 23 is a partial perspective view schematically showing a modified example in which the adapter is attached to the treatment instrument insertion base of FIG. 17 together with the operation unit of the endoscope, and FIG. 24 is an enlarged view of the adapter of FIG. It is a perspective view.

  As shown in FIG. 23, the adapter 70 may be detachable from the treatment instrument insertion cap 40 '.

  In the adapter 70, a hole 72 having a circular planar shape corresponding to the outer periphery of the end surface 40t ′ is formed in the end surface 70i on the treatment instrument insertion base 40 ′ side, and the end surface 70t opposite to the end surface 70i is provided with the hole 70t. Another treatment instrument insertion base 75 having a planar shape that is asymmetric with respect to the center 75c of the end face 75t and having an end face 75t whose shape corresponds to the outer periphery of the hole 28 of the attachment base 24 is provided.

  In addition, the hole 28 can be engaged and disengaged because the attachment base 24 is detachably attached to the other treatment instrument insertion base 75.

The end surface 75t communicates with the hole 72 through a communication path 73 provided in the adapter 70, and a hole 71 communicates with the tube 21 when the attachment base 24 is attached to another treatment instrument insertion base 75. Is formed.
In this embodiment, in order to uniquely define the rotation direction in which the mounting base 24 is attached, even if the tube 21 moves, the adapter 70 itself needs to be attached so as not to rotate with respect to the operation unit.
Therefore, the adapter 70 may be prevented from rotating with respect to the treatment instrument insertion base by having a portion such as a locking portion 76 that engages with the operation portion 3 (the overhang portion 3t) or the like.

  According to such a configuration, even if the end surface 40t ′ of the treatment instrument insertion base 40 ′ has a circular outer periphery, the adapter 70 is attached to the treatment instrument insertion base 40 ′ and attached to the end face 75t of the adapter 70. If the base 24 is mounted, the position of the mounting base 24 ′ in the rotation direction can be uniquely defined, so that the same effects as those of the above-described embodiment and the configuration shown in FIGS. 17 to 24 can be obtained. Can do.

  In the above-described embodiment, the insertion device has been described using the endoscope 1 as an example. However, the present invention is not limited to this, and the insertion device is also applicable to an insertion device that is inserted into a subject with a treatment instrument. Needless to say, it is possible.

1 ... Endoscope (insertion device)
2 ... Insertion part 2z ... Site located outside subject of insertion part 10b ... Treatment instrument insertion port 20 ... Treatment instrument insertion tool 21 ... Tube (treatment instrument guide part)
21a ... One end of the tube 21b ... The other end of the tube 22 ... The treatment instrument holding part 23 ... The treatment instrument operation part 24 ... The attachment base (attachment part)
24c ... Center of engagement surface 24t ... Engagement surface 28 ... Hole 30 ... Connection part 31 ... Treatment tool 40 ... Treatment tool insertion base 40b ... Concave part 40d ... Convex part 40e ... Second part 40h ... First part 40t ... End face of treatment instrument insertion base 70 ... Adapter 71 ... Treatment instrument insertion base 75c ... Center of adapter end face 75t ... End face of adapter K ... Radial direction

Claims (8)

A treatment tool that is provided along an insertion portion of an insertion device to be inserted into a subject and is inserted into the subject through the insertion portion from a treatment tool insertion port of a treatment tool insertion base provided in the insertion device. An insertion tool,
A treatment instrument guide for guiding the treatment instrument to the treatment instrument insertion port;
A treatment instrument holding section that is attached to the insertion section and is provided at one end of the treatment instrument guide section and holds the treatment instrument;
A treatment instrument operation section provided movably along the extending direction of the insertion section with respect to the treatment instrument holding section;
A hole having a shape corresponding to the outer periphery with respect to the shape of the end surface of the treatment instrument insertion hole having an asymmetrical plane with respect to the center of the treatment instrument insertion opening is formed, and the hole is the treatment instrument. A mounting portion provided at the other end of the treatment instrument guide portion, which is detachable from the insertion base,
A treatment instrument insertion tool characterized by comprising:   The treatment instrument insertion according to claim 1, wherein the treatment instrument holding portion is attached to a portion of the insertion portion that is located outside the subject when the insertion portion is inserted into the subject. Ingredients.   The treatment instrument insertion tool according to claim 1, wherein a part of the treatment instrument operation unit is provided to be movable in the treatment instrument holding unit. On the outer periphery of the end face of the treatment instrument insertion base, a convex portion that protrudes outward in the radial direction of the treatment instrument insertion base is provided,
The treatment tool insertion tool according to claim 1, wherein the hole of the mounting portion has a shape in which the outer periphery corresponds to the convex portion of the treatment tool insertion base. On the outer periphery of the end surface of the treatment instrument insertion base, a recess is provided that is recessed in the radial direction of the treatment instrument insertion base.
2. The treatment instrument insertion tool according to claim 1, wherein the hole of the mounting portion has a shape in which the outer periphery corresponds to the concave portion of the treatment instrument insertion base. The outer periphery of the end face of the treatment instrument insertion base has a first part having only one non-arc shape and a second part having an arc shape,
The treatment tool insertion tool according to claim 1, wherein the outer periphery of the hole of the mounting portion has a shape corresponding to the first portion and the second portion. The treatment tool insertion base is detachable and has an outer periphery corresponding to the hole of the mounting portion having a planar shape asymmetric with respect to the center of the end surface on the end surface opposite to the treatment tool insertion base. Having an adapter having another treatment tool insertion base of the shape made,
The treatment tool insertion tool according to claim 1, wherein the hole of the mounting portion is further detachable from the other treatment tool insertion base.   The treatment instrument insertion tool according to claim 1, further comprising a connection portion attached to the insertion portion so that the treatment tool guide portion extends from the treatment tool holding portion along the insertion portion.

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