WO2017026177A1

WO2017026177A1 - Wire traction mechanism for endoscope, and endoscope

Info

Publication number: WO2017026177A1
Application number: PCT/JP2016/068759
Authority: WO
Inventors: 尚彦加藤
Original assignee: オリンパス株式会社
Priority date: 2015-08-11
Filing date: 2016-06-24
Publication date: 2017-02-16

Abstract

A wire traction mechanism 25 is configured so as to be provided with: a first swinging member 31 for swinging integrally with a bending lever 21 about a first shaft part 42 provided on a first axis O1 passing through an inclination center P of the bending lever 21; a first drive gear 51 for swinging integrally with the first swinging member 31, the first drive gear 51 being connected to the first shaft part 42; a first driven gear 52 for meshing with the first drive gear 51; and a first pulley 35 for swinging integrally with the first driven gear 52, proximal-end sides of first traction wires 15a, 15b, distal-end sides of which are connected to a bending part 6, being attached to a peripheral part of the first pulley 35, and the first pulley 35 being connected to the first driven gear 52.

Description

Endoscopic wire pulling mechanism and endoscope

The present invention relates to an endoscope wire pulling mechanism and an endoscope for pulling or relaxing a pulling wire for bending a bending portion in conjunction with a tilting operation of a bending lever provided in an operation portion.

Conventionally, endoscopes for performing various examinations and treatments have been widely used in the medical field and the industrial field. This type of endoscope is generally configured to include a long insertion portion that is inserted into a subject and an operation portion that is provided on the proximal end side of the insertion portion. In addition, the insertion portion of the endoscope is provided with a bending portion for moving the distal end portion in a desired direction. As a mechanism for bending the bending portion, a method of pulling or relaxing the pulling wire connected to the bending portion in conjunction with the tilting operation of the bending lever provided in the operation portion is widely adopted. Yes.

For example, Japanese Patent Application Laid-Open No. 2012-245058 discloses a curved lever that can be tilted around a predetermined swing center, and a shaft that is fixed to a shaft end of the curved lever and orthogonal to the axial center of the curved lever. An endoscope including a traction arm extending in a direction and a traction member (traction wire) fixed to each end of each traction arm is disclosed.

However, since the endoscope disclosed in Japanese Patent Application Laid-Open No. 2012-245058 described above has a configuration in which the pulling wire is directly pulled by the pulling arm fixed to the bending lever, the bending lever and the insertion portion are not provided. It is common to arrange on the same axis. Therefore, for example, when a user holds the operation unit so that the bending lever can be tilted with the thumb, the user may place the insertion unit between the other fingers in order to avoid interference between the insertion unit and the other fingers. It is necessary to hold the operation unit while being sandwiched between the middle finger and the ring finger (for example, between the middle finger and the ring finger), which may hinder good operability.

In particular, endoscopes used in the industrial field have relatively long curved portions. Therefore, in the endoscope disclosed in the above Japanese Patent Laid-Open No. 2012-245058, in order to bend the long bending portion at a sufficient bending angle, the pulling amount with respect to the pulling wire is set. It is necessary to set the traction arm long in order to ensure sufficient, and there is a risk of increasing the size of the operation unit.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope wire pulling mechanism and an endoscope that can realize good operability without increasing the size of an operation unit. To do.

An endoscope wire pulling mechanism according to an aspect of the present invention pulls a pulling wire for bending a bending portion provided in an insertion portion in conjunction with a tilting operation of a bending lever provided in an operation portion. An endoscope wire pulling mechanism for relaxing, a swinging member that swings integrally with the bending lever around a shaft portion disposed on an axis passing through a tilting center of the bending lever; A driving gear coupled to the shaft portion and swinging integrally with the swinging member, a driven gear meshing with the driving gear, and a proximal end side of the pulling wire whose distal end side is connected to the bending portion is a peripheral portion And a pulley that is coupled to the driven gear and swings integrally with the driven gear.

In addition, an endoscope according to an aspect of the present invention includes the endoscope wire pulling mechanism.

The perspective view which concerns on the 1st Embodiment of this invention and shows the external appearance of an endoscope Same as above, cross section of the main part of the endoscope Same as above, a cross-sectional view of the operation unit taken along line III-III in FIG. Same as above, perspective view of wire pulling mechanism viewed from diagonally left rear Same as above, perspective view of wire pulling mechanism viewed from diagonally right front Same as above, main part sectional view showing the wire pulling mechanism FIG. 6 is a sectional view showing the wire pulling mechanism along the line VII-VII in FIG. Same as above, exploded perspective view of the first swing member constituting the wire pulling mechanism Same as above, exploded perspective view of second swing member constituting wire pulling mechanism Same as above, exploded perspective view of first and second swing members The perspective view which looked at the wire pulling mechanism from the diagonally left rear according to the modification of 1st Embodiment. The perspective view which shows the principal part of a wire pulling mechanism by removing a housing same as the above A front view of an ear pulling mechanism according to a second embodiment of the present invention. Same as above, sectional view showing wire pulling mechanism along line XIV-XIV in FIG. The perspective view which concerns on 3rd Embodiment of this invention and removes a housing partially and shows the principal part of a wire pulling mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing the appearance of the endoscope, FIG. 2 is a cross-sectional view of the main part of the endoscope, and FIG. FIG. 4 is a perspective view of the wire pulling mechanism as seen from diagonally left rear, FIG. 5 is a perspective view of the wire pulling mechanism as seen from diagonally right forward, and FIG. 6 is a main part showing the wire pulling mechanism. FIG. 7 is a sectional view showing the wire pulling mechanism along the line VII-VII in FIG. 6, FIG. 8 is an exploded perspective view of the first swing member constituting the wire pulling mechanism, and FIG. 9 is a wire pulling mechanism. FIG. 10 is an exploded perspective view of the first and second swing members.

An endoscope 1 shown in FIG. 1 is, for example, an endoscope used in the industrial field, and is connected to an insertion portion 2 that can be inserted into a subject such as an aircraft engine or piping, and a proximal end of the insertion portion 2. The operation unit 3 is configured to be configured.

The insertion portion 2 is composed of a flexible tubular member in which a distal end portion 5, a bending portion 6, and a flexible tube portion 7 are connected in order from the distal end side.

An observation window 8 and an illumination window 9 are provided on the distal end surface of the distal end portion 5. An imaging unit (not shown) provided with an imaging element such as a CMOS image sensor is connected to the back side of the observation window 8 inside the distal end portion 5. Further, inside the distal end portion 5, a light emitting element (not shown) such as a light emitting diode which is a light source for illumination is provided on the back side of the illumination window 9.

The bending portion 6 is for directing the distal end portion 5 in a desired direction. For example, the bending portion 6 includes a plurality of bending pieces not shown. Here, the bending portion 6 of the present embodiment is configured to be able to bend actively in all directions around the insertion axis O including the vertical and horizontal directions. For this reason, for example, on the inner periphery of the bending piece located at the forefront, wire fixing portions (not shown) are provided at four positions rotated around the insertion axis O by a predetermined angle.

A signal cable (not shown) electrically connected to the imaging unit and the light emitting element in the distal end portion 5 is inserted into the flexible tube portion 7, and the distal end of each wire fixing portion in the bending portion 6 is inserted into the flexible tube portion 7. Are inserted through two pairs of pulling wires (

first pulling wires

15a and 15b and

second pulling wires

16a and 16b (see FIGS. 4 to 7)).

As shown in FIGS. 1 and 2, the operation portion 3 has an operation portion main body 20 having a substantially rectangular parallelepiped shape, and the proximal end side of the insertion portion 2 is prevented from being bent at one end surface in the longitudinal direction of the operation portion main body 20. It is connected via the part 10. Here, the operation unit main body 20 of the present embodiment also serves as a gripping unit. For example, as shown in FIG. 1, a user or the like operates with one end side connected to the insertion unit 2 as the front side. The body part 20 can be gripped along the longitudinal direction. In the following, in order to simplify the description, the front / rear and left / right directions and the up / down direction of each part of the operation unit 3 and the like are convenient based on the state in which the user or the like holds the operation unit body 20 horizontally (see FIG. 1). Defined and explained.

As shown in FIG. 1, on the upper surface of the operation unit main body 20, a bending lever 21 as a bending operation input unit for bending the bending unit 6, a cursor displayed on a display unit (not shown), and the like are operated. The pointing devices 22 are arranged side by side in the longitudinal direction. Thereby, the user or the like can operate the bending lever 21 and the pointing device 22 with the thumb of the hand holding the operation unit main body 20. That is, the user or the like can operate the bending lever 21 and the pointing device 22 without releasing the hand from the operation unit body 20 while holding the operation unit body 20.

The bending lever 21 is constituted by, for example, a joystick-type lever that can be tilted in an arbitrary direction. Here, for example, as shown in FIGS. 1 and 2, a finger rest 21 a capable of abutting a user's finger is fixed to one end of the bending lever 21 outside the operation unit main body 20. Yes. Further, a rubber cover 21 b that covers the outer periphery of the bending lever 21 is provided between the finger rest 21 a and the operation unit main body 20. On the other hand, for example, as shown in FIGS. 2 to 7, a wire pulling mechanism 25 is connected to the other end side of the bending lever 21 inside the operation unit body 20.

The wire pulling mechanism 25 includes a housing 30 fixed in the operation unit main body 20, a first swinging member 31 that is swingably (rotatably) supported in the housing 30, and a first swinging member. A cylindrical member 32 that supports the proximal end side of the bending lever 21 in 31 and a second swingably supported in the housing 30 in a swinging direction different from that of the first swinging member 31. , The first gear train 34 that transmits the swing of the first swing member 31 to the first pulley 35, and the swing of the second swing member 33 is the second pulley 37. And a second gear train 36 that transmits to the second gear train 36.

The housing 30 is formed of, for example, a metal frame having a substantially rectangular parallelepiped shape whose front and rear ends are released, and is fixed in the operation unit main body 20. As shown in FIG. 6, a pair of

brackets

30a and 30a are provided on the upper portion of the housing 30, and the ends of the

brackets

30a and 30a face the housing 30 in a state of facing each other.

As shown in FIGS. 6 to 8, 10 and the like, the first oscillating member 31 has a spherical portion 41 and a pair of front and rear

first shaft portions

42 and 42 protruding from the spherical portion 41. Configured. At the center of the spherical portion 41, a holding portion 41a for receiving and holding the cylindrical member 32 in a swingable (turnable) manner is provided. The spherical portion 41 is provided with a slit 41b through which the bending lever 21 can be inserted.

The holding portion 41a causes the center P of the cylindrical member 32 to exist on the first axis O1 that is the axis of the

first shaft portions

42 and 42, and the axis of the cylindrical member 32 is set to the first axis O1. It is constituted by a substantially cylindrical space for accommodating and holding the cylindrical member 32 at a position to be orthogonal. The slit 41b extends along a direction orthogonal to the swing direction of the first swing member 31 (that is, the extending direction of the first axis O1). In FIG.

Here, in the present embodiment, the first swing member 31 is constituted by two divided members 31l and 31r divided along the extending direction of the slit 41b (see FIG. 8). After these divided members 31l and 31r are joined to each other, the joined state is maintained by the bearing

fittings

38 and 38 attached to the

first shaft portions

42 and 42. The first rocking member 31 joined in this way is rocked in the housing 30 by the

first shaft portions

42 and 42 being supported by the

brackets

30a and 30a via the bearing

fittings

38 and 38. It is supported freely.

The cylindrical member 32 is formed integrally with, for example, the other end portion (base end portion) of the bending lever 21. The cylindrical member 32 is disposed in the holding portion 41 a when the first swing member 31 is in a divided state before being supported in the housing 30. Accordingly, the bending lever 21 is supported by the first swing member 31 in a state in which the bending lever 21 can tilt in the extending direction of the first axis O1 along the slit 41b. Then, the bending lever 21 has the center P of the cylindrical member 32 by a combination of the tilting of the bending lever 21 itself with respect to the first swinging member 31 and the swinging of the first swinging member 31 and the integral tilting. It is possible to incline in an arbitrary direction with respect to the housing 30 (operation unit body 20).

As shown in FIGS. 3, 6, 9, and 10, the second swing member 33 includes an arch-shaped portion 45 and a pair of left and right fixed to both ends of the arch-shaped portion 45 by screws or the like. 2

shaft portions

46, 46. Further, the arch-like portion 45 is provided with a slit 45a extending along the extending direction of the second axis O2, which is the axis of the

second shaft portions

46, 46.

As shown in FIGS. 3 and 7, the

second shaft portions

46 and 46 are configured such that the second axis O2 passes through the tilt center (center P) of the bending lever 21 and the second axis O2 is the first axis. It is supported between the left and right wall portions 30l and 30r of the housing 30 at a position orthogonal to O1. Further, the arch-shaped portion 45 is arranged so as to bypass the upper side of the first swinging member 31 and cross the left and right. The upper portion of the arch-like portion 45 protrudes from the housing 30 and is accommodated in a space formed by the cover 21b. Further, the bending lever 21 is inserted into the slit 45 a of the arch-shaped portion 45. Accordingly, the arch-shaped portion 45 tilts in the extending direction of the first axis O1 while allowing the bending lever 21 to tilt in the extending direction of the second axis O2 by the slit 45a. In this case, a function as an engaging portion that engages in the middle of the bending lever 21 is realized.

With the above configuration, when the first lever 31 is tilted with the bending lever 21 having a component in the extending direction of the second axis O2 (left-right direction with respect to the operation unit main body 20), It can swing integrally with the bending lever 21. Further, when the bending lever 21 is tilted with a component in the extending direction of the first axis O1 (the front-rear direction with respect to the operation unit main body 20), the second swinging member 33 is inclined. And can be swung integrally.

As shown in FIGS. 4, 6, and 7, the first gear train 34 meshes with the first drive gear 51 that swings integrally with the first swing member 31, and the first drive gear 51. And a first driven gear 52.

In the present embodiment, the first drive gear 51 is constituted by a bevel gear, and is fixed on the first shaft portion 42 that protrudes rearward of the first swing member 31. The first driven gear 52 is constituted by a bevel gear having a smaller diameter than the first drive gear 51, and is fixed on the first gear shaft 53 supported between the left and right wall portions 30 l and 30 r of the housing 30. It is installed.

Further, for example, the right end of the first gear shaft 53 protrudes outside the housing 30, and the first pulley 35 is fixed to the protruding end of the first gear shaft 53. That is, in the present embodiment, the first pulley 35 is disposed outside the housing 30. The first pulley 35 is connected to the first driven gear 52 via the first gear shaft 53, and can swing integrally with the first driven gear 52. ing.

Furthermore, the proximal end sides of the first pulling

wires

15 a and 15 b extending from the insertion portion 2 are attached to the peripheral portion of the first pulley 35. The first pulling

wires

15a and 15b are pulled or relaxed by changing the winding state of the first pulley 35 according to the swinging state of the first pulley 35, and the bending portion 6 is moved in the left-right direction. It can be bent.

As shown in FIGS. 3, 5, and 7, the second gear train 36 meshes with the second drive gear 55 that swings integrally with the second swing member 33, and the second drive gear 55. And a second driven gear 56.

In the present embodiment, the second drive gear 55 is constituted by a spur gear, and is fixed on the second shaft portion 46 protruding to the left side of the second swing member 33. The second driven gear 56 is constituted by a spur gear having a smaller diameter than the second drive gear 55, and is fixed on the second gear shaft 57 supported between the left and right wall portions 30 l and 30 r of the housing 30. It is installed.

Also, for example, the right end of the second gear shaft 57 protrudes outside the housing 30, and the second pulley 37 is fixed to the protruding end of the second gear shaft 57. That is, in the present embodiment, the second pulley 37 is arranged outside the housing 30 in a state parallel to the first pulley 35. The second pulley 37 is connected to the second driven gear 56 via the second gear shaft 57, and can swing integrally with the second driven gear 56. ing.

Furthermore, proximal ends of second pulling

wires

16 a and 16 b extending from the insertion portion 2 are attached to the peripheral portion of the second pulley 37. The second pulling

wires

16a and 16b are pulled or relaxed by changing the winding state of the second pulley 37 according to the swinging state of the second pulley 37, and the bending portion 6 is moved in the vertical direction. It can be bent.

In order to avoid interference between the first pulling

wires

15 a and 15 b and the second pulling

wires

16 a and 16 b, the second pulley 37 is disposed at a position offset with respect to the first pulley 35. Yes.

According to such an embodiment, the bending lever centering on the first and

second shaft portions

42 and 46 disposed on the first and second shafts O1 and O2 passing through the tilting center P of the bending lever 21. The first and second swinging

members

31 and 33 swinging integrally with the first and

second shafts

42 and 46 are connected to the first and second swinging

members

31 and 33. The first and second drive gears 51 and 55 that swing integrally, the first and second driven gears 52 and 56 that mesh with the first and second drive gears 51 and 55, and the bending portion 6 on the tip side. The proximal ends of the first and

second pull wires

15a, 15b, 16a, and 16b connected to the first and second driven gears 52 and 56 are attached to the peripheral portion and connected to the first and second driven gears 52 and 56, respectively. The first and

second pulleys

35 and 37 swinging integrally with the driven gears 52 and 56, and the wire pulling mechanism 25. By form has an operation unit 3 without increasing the size of, it is possible to realize good operability.

That is, the pulling amount with respect to the first and second pulling

wires

15a, 15b, 16a, and 16b is set to the gear ratio between the first and second driving gears 51 and 55 and the first and second driven gears 52 and 56, and Since it can be adjusted by the combination of the wrapping radii of the first and

second pulleys

35 and 37, the traction amount can be adjusted with a compact configuration compared to a configuration in which the traction amount is adjusted only by the length of the traction arm. The amount can be secured. As a result, downsizing of the operation unit 3 can be efficiently realized.

Further, the tilting operation of the bending lever 21 is transmitted to the first and

second pulleys

35 and 37 via the first and second drive gears 51 and 55 and the first and second driven gears 52 and 56, By adopting a configuration in which the first and second pulling

wires

15a, 15b, 16a and 16b are pulled or relaxed by the first and

second pulleys

35 and 37, the first and second pulling

wires

15a and 15b are used. , 16a, 16b can be extended in any direction without extending in the coaxial direction with the bending lever 21. Accordingly, the insertion portion 2 and the operation portion 3 can be connected at a position where they do not interfere with the user's hand, etc., and the operability with respect to the endoscope 1 can be realized by making the operation portion 3 easy to grasp. can do. In addition, for example, by connecting the insertion unit 2 to the operation unit 3 on an axis orthogonal to the central axis of the bending lever 21, the bending lever 21 can be stably mounted on the desk or the like. Can also be operated.

In this case, by configuring the first and second driven gears 52 and 56 with a smaller diameter than the first and second drive gears 51 and 55, the first and second pulling

wires

15a, 15b, The pulling amount of 16a, 16b can be easily secured.

Further, the first axis O1, which is the central axis of the

first shaft portions

42, 42, and the second axis O2, which is the central axis of the

second shaft portions

46, 46, are orthogonal to each other. One of the

second gear trains

34, 36 is a gear train composed of a bevel gear, and the other is a gear train composed of a spur gear, whereby the first and

second pulleys

35, 37 are attached to the housing 30. It can be arranged in a concentrated manner in the same direction.

Further, by arranging the arch-shaped portion 45 so as to bypass the first swinging member 31 and cross it, the arch-shaped portion 45 is engaged in the middle of the bending lever 21, so that a dead space is generally formed. The space between the curved lever 21 and the cover 21b, which is apt to be used, can be effectively utilized, and the size of the operation unit 3 can be reduced more efficiently.

Here, in the above-described embodiment, an example of the configuration of the wire pulling mechanism 25 for bending the bending portion 6 in the vertical and horizontal directions has been described. For example, as illustrated in FIGS. By omitting the swing member 33 and the second gear train 36, the wire pulling mechanism 25 for bending the bending portion 6 only in the left-right direction (or only in the vertical direction) can be configured. .

Next, FIGS. 13 and 14 relate to the second embodiment of the present invention, FIG. 13 is a front view of the wire pulling mechanism, and FIG. 14 is a sectional view showing the wire pulling mechanism along the line XIV-XIV in FIG. is there. In the present embodiment, the arrangement of the arched portion 45, the arrangement of the first gear train 34, and the arrangement of the first and

second pulleys

35 and 37 are mainly compared to the above-described first embodiment. Different. In addition, about the structure similar to the above-mentioned 1st Embodiment, the same code | symbol is attached | subjected suitably and description is abbreviate | omitted.

13 and 14, in the present embodiment, the other end side (base end side) of the bending lever 21 protrudes from the cylindrical member 32. In addition, the arch-shaped portion 45 constituting the second swing member 33 is disposed so as to bypass the lower side of the first swing member 31 and cross the left and right. Further, the base end portion of the bending lever 21 is inserted into the slit 45 a of the arch-shaped portion 45.

The first driven gear 52 constituting the first gear train 34 is fixed on the first gear shaft 53 supported between the upper and

lower wall portions

30u and 30d of the housing 30.

Further, the first pulley 35 is fixed on the first gear shaft 53 in the housing 30. Similarly, the second pulley 37 is fixed on the second gear shaft 57 in the housing 30.

According to such a configuration, it is possible to achieve substantially the same effect as that obtained in the first embodiment described above.

In this case, the first and second pulling

wires

15a, 15b, 16a, 16b are arranged in the same direction while preventing the mutual interference by arranging the first and

second pulleys

35, 37 orthogonal to each other. Can be extended.

Next, FIG. 15 relates to a third embodiment of the present invention, and FIG. 15 is a perspective view showing a main part of the wire pulling mechanism with a part of the housing removed. In the present embodiment, the arrangement of the second gear train 36 and the second pulley 37 is mainly different from the above-described second embodiment. In addition, about the structure similar to the above-mentioned 2nd Embodiment, the same code | symbol is attached | subjected suitably and description is abbreviate | omitted.

As shown in FIG. 15, in the present embodiment, the second drive gear 55 is constituted by a bevel gear, and is fixed on the second shaft portion 46 that protrudes to the left side of the second swing member 33. ing. The second driven gear 56 is constituted by a bevel gear having a smaller diameter than the second drive gear 55, and is fixed on the second gear shaft 57 supported between the upper and

lower wall portions

30 u and 30 d of the housing 30. It is installed.

Further, the second pulley 37 is fixed on the second gear shaft 57 in the housing 30.

According to such a configuration, it is possible to achieve substantially the same effect as that obtained in the second embodiment described above.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention. For example, it is a matter of course that the configurations of the above-described embodiments and modifications may be appropriately combined.

This application is filed on the basis of the priority claim of Japanese Patent Application No. 2015-158985 filed in Japan on August 11, 2015. The above disclosure is included in the present specification and claims. Shall be quoted.

Claims

An endoscope wire pulling mechanism for pulling or relaxing a pulling wire for bending a bending portion provided in an insertion portion in conjunction with a tilting operation of a bending lever provided in an operation portion,
An oscillating member that oscillates integrally with the bending lever around a shaft portion disposed on an axis passing through the tilting center of the bending lever;
A drive gear connected to the shaft portion and swinging integrally with the swing member;
A driven gear meshing with the drive gear;
A proximal end side of the pulling wire, the distal end of which is connected to the curved portion, is attached to the peripheral portion, and includes a pulley that is coupled to the driven gear and swings integrally with the driven gear. Endoscope wire pulling mechanism.
2. The wire pulling mechanism for an endoscope according to claim 1, wherein the driving gear and the driven gear are constituted by spur gears meshing with each other in an axial parallel manner.
2. The wire pulling mechanism for an endoscope according to claim 1, wherein the driving gear and the driven gear are constituted by bevel gears meshing at right angles to each other.
2. The endoscope wire pulling mechanism according to claim 1, wherein the driven gear is constituted by a gear having a smaller diameter than the driving gear.
As the swing member, a first swing member that swings integrally with the bending lever around a first shaft portion disposed on a first shaft passing through the tilt center of the bending lever; A second swing that swings integrally with the bending lever about a second shaft portion that passes through the tilt center of the bending lever and is disposed on a second shaft different from the first shaft. The wire pulling mechanism for an endoscope according to claim 1, further comprising a moving member.
6. The endoscope wire pulling mechanism according to claim 5, wherein the first axis and the second axis are orthogonal to each other.
As the drive gear, a first drive gear connected to the first shaft portion and swinging integrally with the first swing member, and a second drive portion connected to the second shaft portion. 6. The endoscope wire pulling mechanism according to claim 5, further comprising: a second drive gear that swings integrally with the swing member.
The first swing member has a holding portion that holds the bending lever in a state in which the tilt center is tiltable in the extending direction of the first shaft,
The endoscope wire pulling mechanism according to claim 5, wherein the second swinging member has an engaging portion that engages in the middle of the bending lever.
The first driven gear meshing with the first driving gear and the second driven gear meshing with the second driving gear are included as the driven gear. Endoscopic wire pulling mechanism.
As the pulley, a proximal end side of a first pulling wire whose distal end side is connected to the curved portion is attached to a peripheral portion, and is coupled to the first driven gear to swing integrally with the first driven gear. A first pulley that moves, a proximal end side of a second pulling wire whose distal end side is connected to the curved portion is attached to a peripheral portion, and is connected to the second driven gear to be connected to the second driven gear; The wire pulling mechanism for an endoscope according to claim 9, further comprising a second pulley that swings integrally.
9. The internal view according to claim 8, wherein the engaging portion engages in the middle of the bending lever between a finger contact portion provided on one end side of the bending lever and the tilt center. Mirror wire pulling mechanism.
Either one of the first drive gear and the second driven gear, or the combination of the second drive gear and the second driven gear is constituted by a spur gear meshing with each other in parallel with each other. 10. The endoscope wire pulling mechanism according to claim 9, wherein the other is constituted by bevel gears meshing with each other at right angles to each other.
The first driven gear is constituted by a gear having a smaller diameter than the first drive gear,
The wire pulling mechanism for an endoscope according to claim 9, wherein the second driven gear is constituted by a gear having a smaller diameter than the second drive gear.
The first pulley and the second pulley are disposed outside a housing that supports the first swing member and the second swing member so as to be swingable. Item 11. A wire pulling mechanism for an endoscope according to Item 10.
The endoscope wire pulling mechanism according to claim 10, wherein the first pulley and the second pulley are arranged in parallel with each other.
An endoscope comprising the endoscope wire pulling mechanism according to claim 1.