WO2017090533A1

WO2017090533A1 - Operating mechanism for endoscope, and endoscope

Info

Publication number: WO2017090533A1
Application number: PCT/JP2016/084299
Authority: WO
Inventors: 尚彦加藤
Original assignee: オリンパス株式会社
Priority date: 2015-11-27
Filing date: 2016-11-18
Publication date: 2017-06-01

Abstract

A first pulley 35 is constituted by a pulley that has a single wire groove 60 on the outer periphery and a wire-securing part 61 provided on the inner peripheral side of the wire groove 60. As a pair of first pulling wires 15a, 15b, one end side and the other end side of a wire member 15, which has a middle part that is secured to the wire-securing part 61 and extends from the same opening of the wire-securing part 61, are arranged so as to be variably wound in opposing directions to each other with respect to the wire groove 60.

Description

Endoscope operating mechanism and endoscope

The present invention relates to an endoscope operation mechanism and an endoscope for pulling or relaxing a pulling wire for bending a bending portion using a pulley.

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 wire pulling mechanism (operation mechanism) using a pulley is widely adopted. In this type of mechanism, a pair of pulling wires connected to the bending portion is fixed to the pulley. ing. When the pulley is rotated in conjunction with a bending lever, a bending knob (bending dial) or the like provided in the operation unit, each traction wire is pulled or relaxed by changing the winding state of the pulley. The bending portion can be bent.

In this case, for example, as disclosed in Japanese Patent Laid-Open No. 8-824949, generally, a pulley has two grooves for independently winding a pair of pulling wires (operation wires). Each puller wire provided side by side in the axial direction is positioned at the base end of the puller wire wound along the bottom surface of each groove, and the hole formed in the bottom surface of each groove (wire groove) And is fixed to the pulley by being brazed with silver or the like.

However, the technique disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 8-824949 is such that each of a pair of pulling wires is wound around a pulley groove and its base end is fixed by brazing or the like. A separate groove must be provided in the pulley every time. As a result, the thickness of the pulley increases, which may increase the size of the operation unit.

The present invention has been made in view of the above circumstances, and provides an endoscope operation mechanism and an endoscope that can suppress an increase in size of an operation unit by providing a pulley for pulling or relaxing a pulling wire. The purpose is to do.

An endoscope operation mechanism according to an aspect of the present invention is configured to input a bending portion provided in an insertion portion to a bending operation input portion provided in an operation portion provided continuously with a proximal end side of the insertion portion. An endoscope operation mechanism for interlocking and bending operation, a pulley shaft that can be rotated in conjunction with an operation input to the bending operation input portion, and a single wire provided around the outer periphery portion A pulley having a groove and a wire fixing portion on the inner peripheral side of the wire groove, a boss portion being pivotally attached to the pulley shaft, a midway portion being fixed to the wire fixing portion, and the wire fixing portion One end side and the other end side of the midway extending from the same opening are variably set in a direction opposite to each other as a pair of pulling wires for bending the bending portion in opposite directions. A wire member routed for winding; Those were example.

An endoscope according to an aspect of the present invention includes the endoscope operation 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 Same as above, exploded perspective view of first pulley The top view which shows a pulley main body and a pulling wire same as the above. The perspective view which shows a pulley division body same as the above. Same as above, exploded perspective view showing first pulley and first pulley shaft An exploded perspective view of the first pulley according to the second embodiment of the present invention. Same as above, main part sectional view of the first pulley The top view which concerns on the 3rd Embodiment of this invention and shows a pulley main body and a pull wire. Same as above, main part sectional view of the first pulley The perspective view which concerns on the 4th Embodiment of this invention and shows a pulley main body and a pull wire. The perspective view which shows a pulley division body same as the above. Same as above, main part sectional view of the first pulley

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 14 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing an appearance of an endoscope, FIG. 2 is a cross-sectional view of a main part of the endoscope, and FIG. FIG. 4 is a perspective view of the wire pulling mechanism as seen from the diagonally left rear, FIG. 5 is a perspective view of the wire pulling mechanism as seen from the diagonally forward right, and FIG. 6 is a wire pulling mechanism. 7 is a cross-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. Is an exploded perspective view of the second swing member constituting the wire pulling mechanism, FIG. 10 is an exploded perspective view of the first and second swing members, FIG. 11 is an exploded perspective view of the first pulley, and FIG. FIG. 13 is a perspective view showing a pulley divided body, and FIG. 14 is an exploded perspective view showing a first pulley and a first pulley shaft. It is.

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. In addition, a light guide for guiding the illumination light emitted from the illumination light source and the light source is provided on the back side of the illumination window 9 inside the distal end portion 5.

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 on the distal end side, 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

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, for the sake of simplicity, the front, rear, left, and right directions of each part of the operation unit 3 and the like are defined for convenience on the basis of a state where the user or the like grips the operation unit body 20 horizontally (see FIG. 1). And explain.

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.

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 as an operation mechanism 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 both front and rear ends are open, and is fixed in the operation unit 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 upper portion of the arch-shaped 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. Thereby, the arch-shaped portion 45 allows the bending lever 21 to tilt 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. 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 pulley 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 (one end) of the first pulley shaft 53 protrudes outside the housing 30, and the first pulley 35 is fixed to the protruding end of the first pulley shaft 53. Has been. In other words, in the present embodiment, the first pulley 35 swings integrally with the first driven gear 52 by being connected to the first driven gear 52 via the first pulley shaft 53. It is possible.

Further, proximal ends 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

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

As shown in FIGS. 3, 5, and 7, the second gear train 36 meshes with the first 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 of securities rather than the second drive gear 55, and is fixed on the second pulley shaft 57 supported between the left and right wall portions 30l and 30r of the housing 30. It is installed.

Further, for example, the right end of the second pulley shaft 57 protrudes to the outside of the housing 30, and the second pulley 37 is fixed to the protruding end of the second pulley shaft 57. That is, in the present embodiment, the second pulley shaft 57 is disposed in parallel with the first pulley shaft 53, and the second pulley 37 fixed to the second pulley shaft 57 is the first pulley. 35 are arranged in parallel with each other. The second pulley 37 is connected to the second driven gear 56 via the second pulley shaft 57, so that the second pulley 37 can swing integrally with the second driven gear 56. ing.

Furthermore, proximal ends of the 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 loosened by changing the winding state of the second pulley 37 according to the swinging (turning) state of the second pulley 37, and the bending portion 6 Can be bent in the vertical direction.

Next, the detailed configuration of the first and

second pulleys

35 and 37 in this embodiment will be described.

For example, as shown in FIG. 14, the first pulley 35 is configured by a metal member having a substantially disk shape. A single wire groove 60 is provided on the outer peripheral portion of the first pulley 35, and a wire fixing portion 61 is provided on the inner peripheral side of the wire groove 60. Further, a boss portion 62 for being attached to the first pulley shaft 53 is provided at the center of the first pulley 35.

Specifically, as shown in FIGS. 7 and 11, in the present embodiment, the first pulley 35 includes a pulley main body 65 and a pulley divided body 66 joined to the pulley main body 65. Has been.

The pulley main body 65 has a substantially disk-shaped base member 65 a whose edge portion forms one side wall of the wire groove 60. A C ring portion 65 b whose outer peripheral surface forms the bottom surface of the wire groove 60 protrudes from one side surface (the surface facing the pulley divided body 66) of the base member 65 a.

Further, on the inner peripheral side of the C ring portion 65b, a boss portion 62 projects from the central portion of one side surface of the base member 65a. The boss portion 62 of the present embodiment has a substantially cylindrical shape with a pulley shaft hole 62a formed therein, and protrudes from the base member 65a with a larger protrusion amount than the C ring portion 65b. Further, a screw hole 62b communicating with the pulley shaft hole 62a is formed in a side portion near the tip of the boss portion 62.

The outer peripheral surface of the boss portion 62 is spaced from the inner peripheral surface of the C ring portion 65b by a predetermined distance, and a gap between the boss portion 62 and the C ring portion 65b is formed as a wire introduction portion 65c. The wire introducing portion 65c is for constituting the wire fixing portion 61, and the base end portions of the first pulling

wires

15a and 15b are introduced into the wire introducing portion 65c through the opening of the C ring portion 65b. ing.

Here, for example, as shown in FIGS. 11 and 12, the first pulling

wires

15a and 15b are specifically formed by a series of wire members (first wire members 15) whose base ends are connected to each other. It is configured. For this reason, the middle part of the first wire member 15 is introduced into the wire introduction part 65c as the base end part of the first pulling

wires

15a, 15b. Then, the introduced midway part is folded back along the outer peripheral surface of the boss part 62, so that one end side and the other end side of the first wire member 15 are paired with the first pulling wire 15a. 15b are extended from the same opening of the C ring portion 65b.

The pulley body 65 has a plurality of (for example, four) screw holes 65d that penetrate the base member 65a and the C-ring portion 65b in the axial direction of the pulley shaft hole 62a at regular intervals. .

11 and 13, the pulley division body 66 has a flange member 66 a whose edge portion forms the other side wall of the wire groove 60. In the present embodiment, the flange member 66a has a substantially disk shape with the same diameter as the base member 65a, and a boss portion insertion hole 66b is provided at the center of the flange member 66a.

Further, as shown in FIG. 13, in the outer peripheral portion of the boss portion insertion hole 66b, the wire fixing portion 61 cooperates with the wire introduction portion 65c from the other side surface (the surface facing the pulley main body 65) of the flange member 66a. The wire pressing part 66c for comprising is protrudingly provided. The wire pressing portion 66c is formed by an annular projection that follows the shape of the wire introducing portion 65c, and an anti-slip uneven portion 66d is formed on the protruding end surface.

Further, on the outer peripheral side of the wire pressing portion 66c, a plurality (for example, four locations) of screw insertion holes 66e corresponding to the screw holes 65d of the pulley body 65 are formed at equal intervals on the flange member 66a. Yes.

As shown in FIGS. 11 and 14, the pulley divided body 66 configured as described above is joined to the pulley body 65, and each screw 67 inserted through each screw insertion hole 66 e is screwed into the corresponding screw hole 65 d. By doing so, the joined state is maintained.

At that time, the other end surface of the flange member 66a is joined to the projecting end surface of the C-ring portion 65b, whereby a single wire groove 60 is formed on the outer peripheral portion of the first pulley 35.

Also, the boss portion 62 is protruded from one side surface of the first pulley 35 by the boss portion 62 being inserted into the boss portion insertion hole 66b that opens to the flange member 66a.

Furthermore, a wire pressing portion 66c protruding from the flange member 66a is inserted into the wire introducing portion 65c. The intermediate portion of the first wire member 15 introduced into the wire introduction portion 65c is pressed against the base member 65a side by the wire pressing portion 66c, whereby the first wire member 15 (first pulling wire) 15 a and 15 b) are fixed to the first pulley 35. In this case, the uneven portion 66d formed on the protruding end surface of the wire pressing portion 66c is engaged with the middle portion of the first wire member 15, so that the first wire member 15 is connected to the first pulley 35. It is firmly fixed against. Although not shown, it is also possible to provide an uneven portion facing the wire pressing portion 66c in the wire introducing portion 65c of the pulley body 65.

As shown in FIGS. 7 and 14, the first pulley 35 configured as described above has the first pulley shaft 53 inserted through the pulley shaft hole 62 a of the boss portion 62 and screwed into the screw hole 62 b of the boss portion 62. When the combined worm screw 68 engages with the first pulley shaft 53, the worm screw 68 is attached to the first pulley shaft 53.

Further, for example, as shown in FIGS. 4 to 7, the first pulling

wires

15a and 15b extending in pairs from the wire fixing portion 61 are connected to the first pulley 35 with respect to the first wire groove 60. After being routed so as to be wound in directions opposite to each other in a variable winding state according to the rotation state, the wire is extended into the insertion portion 2 (see FIG. 2).

Although not described in detail, for example, as shown in FIG. 7, a single wire groove 70 is provided on the outer peripheral surface of the second pulley 37, and a wire is fixed on the inner peripheral side of the wire groove 70. A portion 71 is provided. Furthermore, a boss portion 72 for being pivotally attached to the second pulley shaft 57 is provided at the center of the second pulley 37. Similar to the first pulley 35, the second pulley 37 includes a pulley body 75 and a pulley split body 76. The pulley main body 75 includes a base member 75a and a C ring portion 75b, and a wire introduction portion 75c is formed between the boss portion 72 and the C ring portion 75b. On the other hand, the pulley division body 76 includes a flange member 76a, a boss insertion hole 76b, and a wire pressing portion 76c. The wire pressing portion 76c constitutes a wire fixing portion 71 in cooperation with the wire introducing portion 75c, and the wire fixing portion 71 provides an intermediate portion of the second wire member 16 (the second pulling

wires

16a and 16b). (Base end) is held.

The second pulley 37 configured as described above is pivotally attached to the second pulley shaft 57 via the boss portion 72 in the same manner as the first pulley 35. 4 to 7, the second pulling

wires

16a and 16b extending in pairs from the wire fixing portion 71 are rotated by the second pulley 37 with respect to the second wire groove 70. After being routed so as to be wound in directions opposite to each other in a variable winding state according to the moving state, it is extended into the insertion portion 2 (see FIG. 2).

In this case, as shown in FIGS. 5 and 7, in the present embodiment, in the second pulley 37, the direction in which the protruding end of the boss portion 72 is directed is different from the direction in which the protruding end of the boss portion 62 is directed. (For example, when the protruding end of the boss portion 62 of the first pulley 35 is directed toward the inside of the wire pulling mechanism 25, the protruding end of the boss portion 72 of the second pulley 37 is directed toward the outside of the wire pulling mechanism 25. ) In a lined state, the first pulley shaft 53 and the second pulley shaft 57 are respectively attached to one end side. That is, in the first pulley 35 and the second pulley 37, the protruding portion of the boss portion 62 of the first pulley 35 and the wire groove 70 of the second pulley 37 are arranged side by side, and the second pulley 37 in a staggered state so that the protruding portion of the boss portion 72 and the wire groove 60 of the first pulley 35 are arranged side by side on one end side of the first pulley shaft 53 and the second pulley shaft 57, respectively. It is attached to the shaft.

Thereby, as shown in FIGS. 5 and 7, the first pulling

wires

15 a and 15 b are routed so as to straddle the outer peripheral side of the boss portion 72 without interfering with the second pulley 37. Further, the second pulling

wires

16a and 16b are routed side by side with the first pulling

wires

15a and 15b while being offset to a position where they do not interfere with the first pulling

wires

15a and 15b.

According to such an embodiment, a single wire groove 60 (wire groove 70) is provided on the outer peripheral portion, and the wire fixing portion 61 (wire fixing portion 71) is provided on the inner peripheral side of the wire groove 60 (wire groove 70). The provided pulley constitutes the first pulley 35 (second pulley 37), and the midway portion is fixed to the wire fixing portion 61 (wire fixing portion 71) and the wire fixing portion 61 (wire fixing portion 71). One end side and the other end side of the first wire member 15 (second wire member 16) extending from the same opening are connected to a pair of first pulling

wires

15a and 15b (second pulling

wires

16a and 16b). As a result, it is possible to provide the wire pulling mechanism 25 with the first pulley 35 (second pulley 37) by laying the wire groove 60 (wire groove 70) so as to be wound around in a direction opposite to each other. It is possible to suppress the increase in size of the operating unit 3 by.

That is, the pair of first pulling

wires

15a and 15b (second pulling

wires

16a and 16b) for bending the bending portion 6 in opposite directions is rotated by the first pulley 35 (second pulley 37). By using a single wire groove 60 (wire groove 70) as a wire groove for variably winding in accordance with the moving state, the first pulley 35 (second pulley) can be used compared to the case of providing a plurality of wire grooves. 37) can be reduced in thickness, and the increase in the size of the operation unit 3 can be suppressed accordingly. Further, a wire fixing portion 61 (wire fixing portion 71) is provided on the inner peripheral side of the wire groove 60 (wire groove 70), and the first pulling wire 15a, By extending 15b (second pulling

wires

16a and 16b), a pair of first pulling

wires

15a and 15b (second pulling

wires

16a and 16b) is converted into a single wire groove 60 (wire groove 70). ) Can be wound efficiently. Furthermore, the middle part of the first wire member 15 (second wire member 16) is fixed to the wire fixing part 61 (wire fixing part 71), and one end side and the other end side from the middle part are first pulled. By using as the

wires

15a and 15b (second pulling

wires

16a and 16b), a pair of first pulling

wires

15a and 15b (second pulling wires 16a) can be formed with a simple configuration without performing silver brazing or the like. 16b) can be prevented.

In this case, the protrusion of the boss 62 of the first pulley 35 and the wire groove 70 of the second pulley 37 are arranged side by side, and the protrusion of the boss 72 of the second pulley 37 and the first The first pulley 35 and the second pulley 37 are placed on one end side of the first pulley shaft 53 and the second pulley shaft 57 in a staggered state so that the wire grooves 60 of the pulley 35 are arranged side by side. By attaching each to the shaft, the first pulley 35 and the second pulley 37 can be efficiently arranged side by side on the side portion of the housing 30 and the increase in the size of the operation unit 3 can be more effectively suppressed. can do. That is, by arranging the protruding portions of the

boss portions

62 and 72 alternately, the interference between the first pulling

wires

15a and 15b and the second pulley 37 can be prevented, and the second pulling wire 16a. 16b can be arranged side by side at a position where they do not interfere with the first pulling

wires

15a, 15b. Accordingly, even when the first and

second pulleys

35 and 37 are arranged side by side along the side portion of the housing 30 and the like, it is not necessary to offset them in the axial direction. For example, it is sufficient to secure a space corresponding to the thickness of a single pulley, and the increase in size of the operation unit 3 can be efficiently suppressed.

Further, the first pulley 35 (second pulley 37) is divided into a pulley main body 65 (pulley main body 75) and a pulley divided body 66 (pulley divided body 76), and the base member of the pulley main body 65 (pulley main body 75). A wire introduction part 65c (wire introduction part 75c) is formed between the C ring part 65b (C ring part 75b) and the boss part 62 (boss part 72) protruding from 65a (base part 75a), and the C ring part 65b. In the middle of the first wire member 15 (second wire member 16) introduced into the wire introduction portion 65c (wire introduction portion 75c) from the opening of the (C ring portion 75b), the pulley division body 66 (pulley division body) 76) by pressing with a wire pressing portion 66c (wire pressing portion 76c) protruding from the flange member 66a (flange member 76a). The first wire member 15 constituting the 15a and 15b (the second wire member 16 constituting the pair of second pulling

wires

16a and 16b) is connected to the first pulley 35 (second pulley 37). Can be easily fixed.

Next, FIGS. 15 and 16 relate to the second embodiment of the present invention, FIG. 15 is an exploded perspective view of the first pulley, and FIG. 16 is a cross-sectional view of the main part of the first pulley. 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.

As shown in FIGS. 15 and 16, in the present embodiment, the first pulley 35 has an elastic member 80 inserted into the wire introduction portion 65c.

The elastic member 80 is formed of, for example, an annular resin member that follows the shape of the wire introduction portion 65c, and is disposed so as to overlap the middle portion of the first wire member 15 in the wire introduction portion 65c. . When the pulley divided body 66 is joined to the pulley main body 65, the elastic member 80 is pressed by the wire pressing portion 66c inserted into the wire introducing portion 65c, and the first wire member 15 is halfway while being elastically deformed. The portion is biased toward the base member 65a. Thereby, the first wire member 15 is firmly fixed to the first pulley 35.

Here, in the present embodiment in which the middle portion of the first wire member 15 is biased via the elastic member 80, the uneven portion 66d formed on the protruding end surface of the wire pressing portion 66c can be omitted as appropriate. is there.

According to such an embodiment, substantially the same operational effects as those of the above-described first embodiment can be achieved.

Although specific explanation is omitted, it is needless to say that the same configuration can be adopted for the second pulley 37.

Next, FIGS. 17 and 18 relate to a third embodiment of the present invention, FIG. 17 is a plan view showing a pulley body and a pulling wire, and FIG. 18 is a cross-sectional view of the main part of the first pulley. 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.

As shown in FIGS. 17 and 18, in this embodiment, a substantially cylindrical resin-made elastic member 82 is fixedly provided on the outer peripheral surface of the base end side of the boss portion 62 provided in the pulley body 65. Yes.

Further, as shown in FIG. 18, in the present embodiment, the C-ring portion 83 that forms the bottom surface of the wire groove 60 is constituted by a resin elastic member that is separate from the pulley body 65. As shown in FIG. 17, the C-ring portion 83 is formed with a screw insertion hole 83a corresponding to the screw hole 65d. When the pulley divided body 66 is fastened to the pulley main body 65, the screw 67 is inserted into each screw insertion hole 83 a, and the C ring portion 83 is fastened and fixed to the pulley main body 65 together with the pulley divided body 66 by these screws 67. Has been.

In such a configuration, when the first pulley 35 is rotated and tension is generated in the first pulling wire 15a (or the first pulling wire 15b), the middle portion of the first wire member 15 is elastic. The member 82 and the C ring portion 83 are crimped to each other while being elastically deformed. The first wire member 15 is firmly fixed to the first pulley 35 by the synergistic effect of the pressure bonding to the elastic member 82 and the C ring portion 83 and the pressure by the wire pressing portion 66c. .

Here, in this embodiment, it is also possible to omit an appropriate value for the uneven portion 66d formed on the protruding end surface of the wire pressing portion 66c. In the present embodiment, the C ring portion is not formed separately from the pulley main body 65, and the elastic member 82 is provided on the outer peripheral surface of the boss portion 62 or the outer peripheral portion of the boss portion 62. It is also possible to adopt a configuration in which the pulley main body 65 and a separate C ring portion 83 are provided without providing the elastic member 82.

Next, FIGS. 19 and 20 relate to a fourth embodiment of the present invention, FIG. 19 is a perspective view showing a pulley body and a pulling wire, FIG. 20 is a perspective view showing a pulley divided body, and FIG. 21 is a first view. It is principal part sectional drawing of a pulley. 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.

19 and 21, the boss portion 62 of the present embodiment protrudes from the base member 65a with a protruding amount that is substantially flush with the pulley divided body 66. The boss portion 62 has a screw hole 62b communicating with the pulley shaft hole 62a at a position facing the opening of the C ring portion 65b.

For example, as shown in FIG. 20, the wire pressing portion 66c of the present embodiment is partially cut away at a position corresponding to the opening of the C ring portion 65b.

When the first pulley 35 configured in this way is attached to the first pulley shaft 53, first, as shown in FIG. 21, the first pulley shaft 53 is inserted into the pulley shaft hole 62a of the boss portion 62. Is inserted. A worm screw 68 is screwed into the screw hole 62 b of the boss portion 62 through the opening of the C ring portion 65 b and the opening of the wire pressing portion 66 c, and the worm screw 68 is inserted into the first pulley shaft 53. By engaging, the first pulley 35 is fixed with respect to the first pulley shaft 53.

According to such an embodiment, in addition to the operation and effect substantially the same as those of the first embodiment described above, the boss portion 62 is attached to the side of the first pulley 35 for fastening and fixing to the first pulley shaft 53. Since it is not necessary to make it protrude, there exists an effect that the 1st pulley 35 can be reduced more effectively.

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 goes without saying that the configurations of the above-described embodiments may be appropriately combined.

This application is filed on the basis of the priority claim of Japanese Patent Application No. 2015-232411 filed in Japan on November 27, 2015. The above disclosure is included in the present specification and claims. Shall be quoted.

Claims

Endoscopic operation mechanism for causing the bending portion provided in the insertion portion to bend in conjunction with the operation input to the bending operation input portion provided in the operation portion provided continuously to the proximal end side of the insertion portion. Because
A pulley shaft that can rotate in conjunction with an operation input to the bending operation input unit;
A pulley having a single wire groove provided around the outer peripheral portion and a wire fixing portion on the inner peripheral side of the wire groove, and a boss portion pivotally attached to the pulley shaft;
A pair for fixing the midway part to the wire fixing part and for causing one end side and the other end side of the wire fixing part to bend in the opposite direction from the middle part extending from the same opening of the wire fixing part. An endoscope operating mechanism comprising: a wire member arranged as a pulling wire for the wire groove so as to be variably wound around the wire groove in opposite directions.
The pulley shaft has a first pulley shaft and a second pulley shaft parallel to the first pulley shaft,
As the pulley, a first pulley in which a part of the boss part pivotally attached to the first pulley shaft projects to one side, and a part of the boss part pivotally attached to the second pulley shaft are one. A second pulley protruding to the side,
As the wire member, a first wire member arranged such that one end side and the other end side are variably wound in opposite directions of the wire groove provided around the first pulley, one end side, and the other A second wire member arranged such that the end side is variably wound in opposite directions of the wire grooves provided around the second pulley;
In the first pulley and the second pulley, the protruding portion of the boss portion of the first pulley and the wire groove of the second pulley are arranged side by side, and the second pulley The protrusions of the bosses and the wire grooves of the first pulley are arranged side by side so that they are attached to one end side of the first pulley shaft and the second pulley shaft in a staggered state. The endoscope operating mechanism according to claim 1, wherein the endoscope operating mechanism is provided.
The pulley has a pulley body, and a pulley divided body joined to the pulley body,
The pulley body includes a base member having an edge portion forming one side wall of the wire groove, a C ring portion protruding from the base portion so that an outer peripheral surface forms the bottom surface of the wire groove, and the C ring portion The boss portion protruding from the base portion on the inner peripheral side, and a wire introduction formed between the C-ring portion and the boss portion,
The pulley split body includes a flange member joined to the C-ring portion and an edge portion forming the other side wall of the wire groove, and a wire pressing portion protruding from the flange member so as to be inserted into the wire introduction portion. Have
2. The inner portion according to claim 1, wherein the wire pressing portion is fixed by pressing a midway portion of the wire member introduced into the wire introduction portion from the opening of the C ring portion toward the base member side. Endoscopic operating mechanism.
The said wire press part has the uneven | corrugated | grooved part for anti-slip which engages with the midway part of the said wire member introduce | transduced in the said wire introducing | transducing part in an end surface. Operation mechanism.
Having an elastic member inserted into the wire introduction part,
The endoscope operation according to claim 3, wherein the wire pressing portion presses a midway portion of the wire member introduced into the wire introduction portion against the base member side via the elastic member. mechanism.
The endoscope operating mechanism according to claim 3, wherein an elastic member is provided on an outer peripheral surface of the boss portion.
The endoscope operating mechanism according to claim 3, wherein the C-ring portion is formed of an elastic member.
The endoscope operating mechanism according to claim 3, wherein a screw hole for fixing the boss portion to the pulley shaft by screwing is provided at a position facing the opening of the C-ring portion. .
An endoscope comprising the endoscope operation mechanism according to claim 1.