JP5784386B2 - Bending operation device - Google Patents

Description

  The present invention relates to a bending operation device for bending a bending portion provided in an insertion portion of an endoscope, and more particularly, to a bending operation device including a lock mechanism for holding the bending portion in a desired bending state. .

  2. Description of the Related Art Conventionally, endoscopes that perform observation, various processing, etc. by inserting a thin insertion portion into the body or the like are widely used that have a bending portion for directing the distal end portion of the insertion portion in a desired direction. ing. In general, in this type of endoscope, an operation unit is connected to the base side of the insertion unit, and the bending unit is operated to bend through a bending operation device provided in the operation unit.

  As the bending operation device, a configuration in which the bending portion is bent by pulling or relaxing the operation wire connected to the bending portion is widely adopted. In this case, for pulling or relaxing the operation wire, a pulley, a sprocket, etc. It is common to use a rotating member made of

  Also, this type of bending operation device is generally provided with a lock mechanism that restricts (brakes) the rotation of the rotating member with a predetermined amount of fixing force and brakes (locks) the bending portion into a desired bending state. ing. For example, Patent Document 1 discloses a technique of a bending operation device in which when a lock operation shaft is rotated about an axis, a lock plate is eccentrically rotated and is brought into contact with and separated from an outer peripheral surface of a pulley drive shaft for braking. Yes.

JP 2008-23064 A

  However, the lock mechanism disclosed in the above-mentioned Patent Document 1 repeatedly makes contact with the pulley drive shaft by the lock plate every time the curved portion is held (locked) in a desired curved state. There is a problem that the shaft is worn, and the braking force for braking the rotation of the pulley drive shaft is reduced. Further, there is a possibility that the amount of braking force applied to the pulley drive shaft by the lock plate may vary due to an assembly error at the time of manufacture, and there is a problem that the braking force for braking the rotation of the pulley drive shaft is not stable due to this variation. .

  Accordingly, the present invention has been made in view of the above problems, and provides a bending operation device that can prevent a decrease in braking force during bending braking with a simple configuration and has a stable braking force for braking a pulley drive shaft. For the purpose.

A bending operation device according to an aspect of the present invention is a bending operation device that operates a bending portion of an endoscope, and an operation wire connected to the bending portion is wound around a circumferential portion, and the operation wire is rotated. A rotating member that pulls or relaxes, a rotating shaft that rotates integrally with the rotating member, and an outer peripheral surface of the rotating shaft that is rotatably disposed on an outer periphery of the rotating shaft and is elastically deformed. A ring-shaped braking member capable of slidingly contacting an inner peripheral surface thereof, and a first position for braking the rotation of the rotating shaft by applying a pressing force to the outer peripheral portion of the braking member to elastically deform inward. A pressing member that is operated to be changed to a second position that releases the pressure on the braking member; and an anti-wear means that prevents wear of the braking member and the pressing member during braking of the rotating shaft, The wear preventing means is provided on the braking member, and the pressing from the pressing member. Comprising a thin portion formed on the inner circumferential portion of the outer peripheral portion is provided.

  According to the bending operation device of the present invention, it is possible to prevent the braking force from being lowered during bending braking with a simple configuration and to stabilize the braking force for braking the pulley drive shaft.

The perspective view which shows schematic structure of the endoscope which concerns on one Embodiment of this invention. Side view of the operation unit The top view which shows an operation part from a base end side similarly The exploded perspective view showing the principal part of the bending operation device Same section of the bending operation device The perspective view which shows the structure of a rotating shaft similarly The perspective view which shows the structure of the cam which is a locking mechanism, and C ring similarly The figure which shows the state at the time of braking by a locking mechanism similarly The figure which shows the state at the time of the brake release by a locking mechanism similarly The perspective view which shows the structure of the cam and C ring which are the locking mechanisms of a 1st modification similarly The figure which shows the state at the time of braking by the locking mechanism of FIG. The figure which shows the state at the time of the brake release by the locking mechanism of FIG. The perspective view which shows the structure of the cam and C ring which are the locking mechanisms of a 2nd modification as same as the above. The figure which shows the state at the time of braking by the locking mechanism of FIG. The figure which shows the state at the time of the brake release by the locking mechanism of FIG. The front view which concerns on a 1st reference example and shows the state by which the suction valve was mounted | worn with the operation part main body of the endoscope partially The perspective view which shows the state in which the suction valve was mounted | worn with the operation part main body of the endoscope partially The perspective view which shows the state from which the suction valve was removed from the operation part main body of the endoscope partially The side view which shows the state in which the suction valve was attached to the operation part main body of the endoscope partially The top view which shows the structure of the suction valve which concerns on a 2nd reference example The partial sectional view which shows the state with which the suction valve was mounted | worn with the operation part main body of the endoscope similarly The same sectional view when removing the suction valve from the operation part body of the endoscope The partial sectional view when the suction valve is removed from the operation unit body of the endoscope The same sectional view when removing the ring member from the operation part main body of the endoscope The top view which shows the structure of the suction valve which concerns on a 3rd reference example Front view showing the configuration of the suction valve Side view showing the configuration of the suction valve The top view which shows the structure of the cylinder part for valve attachment provided in an operation part similarly Sectional view showing the configuration of cam grooves formed in the cylinder XX-XXX sectional view of FIG. 29 Sectional drawing explaining the state which attaches a suction valve to the operation part main body of an endoscope similarly The fragmentary sectional view which shows the structure of the medical syringe which concerns on a 4th reference example and is used for an endoscope The figure which shows typically the light source device and monitor which an endoscope is hooked on an endoscope hanger and to which this endoscope is connected concerning a 5th reference example.

  Hereinafter, the bending operation device according to the present invention will be described. In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.

  1 to 15 relate to an embodiment of the present invention, FIG. 1 is a perspective view showing a schematic configuration of an endoscope, FIG. 2 is a side view of an operation unit, and FIG. 3 is a plan view showing the operation unit from the base end side. 4 is an exploded perspective view showing the main part of the bending operation device, FIG. 5 is a cross-sectional view of the main part of the bending operation device, FIG. 6 is a perspective view showing the configuration of the rotating shaft, and FIG. FIG. 8 is a diagram showing a state at the time of braking by the locking mechanism, FIG. 9 is a diagram showing a state at the time of releasing the braking by the locking mechanism, and FIG. 10 is a locking mechanism of the first modified example. 11 is a perspective view showing the configuration of the cam and the C ring, FIG. 11 is a diagram showing a state at the time of braking by the lock mechanism of FIG. 10, FIG. 12 is a diagram showing a state at the time of brake release by the lock mechanism of FIG. FIG. 14 is a perspective view showing the configuration of a cam and a C ring, which are the lock mechanism of the second modification, and FIG. Shows a state during braking by click mechanism, FIG. 15 is a diagram showing a state when released brake by the locking mechanism of FIG. 13.

  As shown in FIG. 1, an endoscope 1 includes an elongated insertion portion 2, an operation portion 3 that is connected to the proximal end of the insertion portion 2, and a universal that extends from a proximal end side portion of the operation portion 3. And a cord 4. In addition, the insertion part 2 has the hard part 5, the bending part 6, and the front-end | tip part 7, and these are connected in order from the operation part 3 side. The insertion part may be provided with a flexible and flexible tube part instead of the hard part 5.

  A pair of operation wires 19 (see FIGS. 4 and 5) extending from the operation unit 3 side are inserted into the rigid portion 5, and the distal ends of these operation wires 19 are connected to the bending portion 6. These operation wires 19 can be alternately pulled or relaxed by a bending operation device 20 which will be described later, whereby the bending portion 6 is bent in, for example, two vertical (UD) directions.

  The operation unit 3 includes a gripping unit 10 that is connected to the proximal end of the insertion unit 2, and an operation unit body 11 that is connected to the base side of the gripping unit 10. A treatment instrument channel opening 10 a is provided on the distal end side of the grip 10 as an opening of a treatment instrument channel through which various treatment instruments are inserted into the insertion section 2.

  A bending operation device 20 is disposed inside the operation unit main body 11 (see FIG. 5). In addition, a bending operation lever 15 and a bending lock lever 16 connected to the bending operation device 20 are swingably disposed outside the operation unit main body 11, and operation switches for various endoscope functions are arranged. (See FIGS. 1 to 3). Further, the base end portion of the universal cord 4 is connected to the side portion of the operation portion main body 11.

  More specifically, for example, as shown in FIGS. 2 and 5, an exterior case 12 constituting the operation unit main body 11 includes a case main body 13 having circular openings 13 </ b> L and 13 </ b> R on both left and right sides, and these openings. The circular operation devices 20 of the present embodiment are mainly held in the operation unit main body 11 via the right cover 14R.

  Also, for example, as shown in FIGS. 2 and 3, the bending operation lever 15 of the present embodiment includes a lever main body 15a extending along the side surface of the outer case 12 (that is, the right cover 14R), and the lever. A finger pad 15b that is connected to the free end of the main body 15a and extends in the width direction of the case main body 13 is configured. A part of the free end side of the lever main body 15a is formed wider than the fixed end side. In the wide area on the lever main body 15a, for example, a curve indicating the bending operation direction of the bending operation lever 15 is displayed. An “Up” display indicating an operation direction for bending the portion 6 upward and an “Down” display indicating the operation direction for bending the bending portion 6 downward are described.

  By displaying the operation direction on the lever main body 15a in this way, the display of the operation direction is not hidden behind the bending operation lever 15 even when the bending operation lever 15 is swung. And the like can accurately recognize the operation direction by visual recognition. A plurality of protrusions 15c extending along the longitudinal direction are provided on the outer surface side of the finger rest 15b. These ridges 15c function as anti-slip members when an operator or the like operates the bending operation lever 15. These ridges 15c are extended over substantially the entire region from one end side to the other end side of the finger pad 15b, so that the surgeon and the like are good in various directions with respect to the finger pad 15b. It is possible to realize simple operation input.

  For example, as shown in FIGS. 3 and 5, the universal cord 4 of the present embodiment is connected to the left cover 14 </ b> L.

  In addition, on one side of the outer case 12, here, around the bending operation lever 15 on the right cover 14R side and on the side of the grip portion 10, an indicator based on the model name of the endoscope 1 or characters of the corresponding treatment tool is transparent. Alternatively, there are provided indicator plates 17a and 17b which are formed in two colors by a light-transmitting resin and a metal or resin plate which has the characters penetrated. On the back side of the indicator plates 17a and 17b in the outer case 12 or the holding part 10, a light emitting part in which an LED or a light guide is branched is provided. Then, by applying light toward the indicator plates 17a and 17b, the characters on the indicator plates 17a and 17b are illuminated, and the user can easily recognize the model name or the corresponding treatment tool by the shadow.

  As shown in FIGS. 4 and 5, the bending operation device 20 includes a pulley 25 as a rotating member and a lock mechanism 26 capable of braking (locking) the rotation of the pulley 25 in the housing 21 as a supporting member. The main part is configured by being housed in the main body. The housing 21 includes, for example, a substantially cylindrical housing body 22 that opens at one end side, a plate body 23 that closes the opening of the housing body 22, and an outer peripheral portion of the housing body 22 that is fitted to the plate body 23. And a cover 42 (see FIG. 5) fixed by a plurality of fixing screws 43.

  A pulley housing chamber 27 for housing the pulley 25 is provided inside the housing 21 closed by the housing main body 22 and the cover 42 as described above. Further, a lock mechanism 26 is provided in a deep portion of the pulley housing chamber 27. A lock mechanism housing chamber 28 is provided for housing the housing. The pulley housing chamber 27 is configured by a substantially circular recess, and a pair of wire insertion ports (not shown) formed by notches are provided on the peripheral wall of the pulley housing chamber 27.

  The lock mechanism accommodation chamber 28 includes a ring accommodation chamber 29 formed of a substantially circular recess that is concentric with the pulley accommodation chamber 27 and smaller in diameter than the pulley accommodation chamber 27, and a substantially rectangular recess that communicates with one side of the ring accommodation chamber 29. And a cam housing chamber 30.

  Further, a through hole coaxial with the pulley housing chamber 27 and the ring housing chamber 29 is formed in the housing main body 22 as a pulley bearing hole 31. Further, a through hole communicating with the cam housing chamber 30 and parallel to the pulley bearing hole 31 is formed in the housing body 22 as a cam bearing hole 32.

  The pulley 25 is formed of a substantially disk-shaped member having an engagement groove 35 that can be engaged with the operation wire 19 on the circumferential surface. A rotation shaft 36 that rotates integrally with the pulley 25 is inserted and erected at the center of the pulley 25. As shown in FIG. 5, a fixed block 44 that contacts the end surface of the pulley 25 and fixes the rotating shaft 36 and the pulley 25 is arranged at the center of the plate body 23 on the end surface engaged with the pulley 25 of the rotating shaft 36. It is screwed through the hole 23a drilled in. The fixing block 44 is further provided with a plurality of threaded screw holes 44a, and screws 44b are screwed into these screw holes 44a so that the end face of the pulley 25 is abutted and fixed.

  The rotating shaft 36 is inserted into the pulley bearing hole 31 from the pulley housing chamber 27 side. Further, the tip end portion of the rotating shaft 36 passes through the pulley bearing hole 31 and protrudes to the outside of the housing main body 22, and the lever main body 15 a of the bending operation lever 15 is provided at the protruding end portion of the rotating shaft 36. It is fixed. As a result, the pulley 25 is rotatably supported with respect to the housing main body 22 and can be rotated through an operation input to the bending operation lever 15.

  Further, the rotation shaft 36 is integrally formed with a stopper 33 for preventing rotation, which extends in a direction perpendicular to the longitudinal axis (see FIGS. 5 and 6). The stopper body 33 is in contact with a stopper portion (not shown) provided so as to protrude from the surface of the housing main body 22 and defines a maximum rotation range in which the pulley 25 is allowed. Since the stopper body 33 is not formed separately from the rotation shaft 36 but is integrally formed, a predetermined strength and durability can be obtained. Therefore, the maximum rotation range of the pulley 25 can be stably increased even with a large amount of rotational power. Can be defined. Furthermore, the stopper body 33 can improve the rotation stopping strength by increasing the area of the side surface.

  The pulley 25 is provided with a pair of guide grooves 37. These guide grooves 37 are constituted by through grooves having a substantially arc shape concentric with the rotation shaft 36, and screw members 24 for fastening and fixing the plate body 23 to the housing body 22 are inserted into the respective guide grooves 37. Has been. Then, by the engagement of each guide groove 37 and each screw member 24, stable rotation of the pulley 25 is guaranteed.

  A pair of notch portions 38 having a symmetrical shape is provided on one side of the pulley 25. Further, near each notch portion 38, for example, a wire stop chamber 39 formed of a rectangular recess is provided, and each wire stop chamber 39 communicates with each notch portion 38 via a recessed groove 40. For example, a stainless steel wire stopper 19 a formed at the base end of each operation wire 19 by a known swaging process or the like is accommodated in each wire stopper chamber 39 and held by soldering or the like.

  Thus, the distal end side of each operation wire 19 whose base end portion is held in the wire stop chamber 39 is guided to the engagement groove 35 via the concave groove 40 and the notch portion 38, and is wound around the outer peripheral portion of the pulley 25. Has been. Further, the distal end side of the operation wire 19 extends outside the housing 21 through the wire insertion port 27 a and is connected to the bending portion 6 through the inside of the grip portion 10 and the rigid portion 5. These operation wires 19 are pulled or relaxed by changing the winding state of the engagement groove 35 with the rotation of the pulley 25, and the bending portion 6 can be bent. .

  In order to reduce the friction between the pulley 25 and the plate member 23, for example, a resin spacer 41 is interposed between the pulley 25 and the recess 25 a formed in the pulley 25. (See FIGS. 4 and 5).

  Further, as described above, since the cover 42 is fixed to the outer peripheral portion of the housing main body 22 and the plurality of fixing screws 43, the housing 21 can take up a large space in the pulley housing chamber 27 and the large pulley 25. Can be adopted. That is, the housing 21 has a structure in which a large pulley 25 can be accommodated and an increase in size is prevented as a structure in which the cover 42 is screwed from the outer peripheral side of the housing body 22.

  For example, as shown in FIG. 5, the cover 42 of the housing 21 includes a plurality of guide fittings 56 that guide various cables such as signal lines extending from the insertion portion 2 side into the operation portion 3 into the universal cord 4. The fixing column 60 is fixed. Specifically, here, three fixing pillars 60 (only two are shown in FIG. 5) are screwed in the vicinity of the edge of the surface of the cover 42 with a predetermined interval. The ends of the fixing columns 60 are fixed to the flat frame 57 by screws 59, respectively. A guide fitting 56 is inserted into a hole formed in the frame 57, and the frame 57 and the guide fitting 56 are fixed by screws 58. Thus, the guide fitting 56 is fixed to the housing 21. With such a structure, assemblability is improved.

  As shown in FIGS. 4 and 5, the lock mechanism 26 includes a C ring 45 that is a braking member as a ring member held on the outer peripheral side of the rotating shaft 36 of the pulley 25, and an outer peripheral surface of the C ring 45. And a cam 46 serving as a pressing member capable of pressing a part thereof on the inner peripheral side.

  The C ring 45 is made of a resin member having a predetermined elasticity made of, for example, POM {polyoxymethylene (polyacetal resin)}. A cutout portion 45a extending in the axial direction is formed on a part of the outer peripheral surface of the C-ring 45, and the portion on the C-ring 45 where the cutout portion 45a is formed is easier to deform than other portions. It is set as an easily deformable part.

  As shown in FIG. 5 and FIG. 6, the cam 46 is constituted by, for example, a substantially plate-shaped cam made of metal and is accommodated in the cam accommodating chamber 30. An eccentric shaft 50 that can rotate integrally with the cam 46 is erected on the cam 46, and the eccentric shaft 50 is inserted into the cam bearing hole 32.

  Further, the end of the eccentric shaft 50 penetrates the cam bearing hole 32 and protrudes to the outside of the housing body 22, and the curved lock lever 16 is fixed to the protruding end of the eccentric shaft 50. As a result, the cam 46 is rotatably supported (swingable) with respect to the housing main body 22 and can be rotated through an operation input to the bending lock lever 16.

  For example, as shown in FIGS. 4 and 5, a partition plate 55 is provided between the cam housing chamber 30 and the pulley housing chamber 27 to partition them. For fastening the partition plate 55 to the housing body 22, a part of the screw member 24 for fastening and fixing the plate body 23 to the housing body 22 is also used.

  The cam 46 is formed with a circumferential groove 46 a along the outer peripheral portion, and an O-ring 47 is provided in the circumferential groove 46 a as an anti-abrasion means that comes into contact with the outer peripheral surface of the C ring 45. The O-ring 47 has a larger cross-sectional shape than the circumferential groove 46a, and is disposed so as to protrude from the outer peripheral portion of the cam 46 with a predetermined thickness. The cam 46 is formed such that outer edge portions 46b formed on both sides protrude outward (see FIG. 6). In these outer edge portions 46 b, the O-ring 47 is immersed and hidden inside the cam 46.

  In such a configuration, when the cam 46 is rotated in one direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, as shown in FIG. 46 b comes into contact with the outer peripheral surface of the C-ring 45 and passes over it, and then the O-ring 47 provided on the cam 46 comes into contact with the outer peripheral surface of the C-ring 45 and a part of the outer peripheral surface of the C-ring 45. To the inner circumference. By this pressing, the C ring 45 is elastically deformed inward mainly from the easily deformable portion (notch portion 45a), and the inner peripheral surface of the C ring 45 is slidably contacted with the outer peripheral surface of the rotating shaft 36. . By such sliding contact of the C-ring 45, the rotation of the rotation shaft 36 (pulley 25) is braked (locked) with a predetermined amount of force. During the braking operation, the surgeon or the like turns the curved lock lever 16 so that the turning shaft 36 is reliably braked by the feeling that the outer edge 46b of the cam 46 abuts against the outer peripheral surface of the C-ring 45 and gets over. Can be recognized.

  On the other hand, when the cam 46 is rotated in the other direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, an O-ring 47 provided on the cam 46 as shown in FIG. Is separated from the outer peripheral surface of the C-ring 45. As a result, the elastic deformation of the C-ring 45 is restored, and the inner peripheral surface of the C-ring 45 is separated from the outer peripheral surface of the rotating shaft 36, thereby releasing the braking (locking) on the rotating shaft 36 (pulley 25). Is done. Even at this time, the operator or the like recognizes the rotational position of the curved lock lever 16 in which the rotational shaft 36 is reliably released by the feeling that the outer edge 46b of the cam 46 abuts against the outer peripheral surface of the C-ring 45 and gets over. can do.

  The bending operation device 20 of the present embodiment configured as described above is an O of the wear preventing means provided on the cam 46 even if the rotating shaft 36 connected to the pulley 25 is repeatedly braked or released. Since the ring 47 comes into contact with and presses against the C-ring 45 or is in a non-contact state, wear caused by the outer peripheral portion of the resinous C-ring 45 and the cam 46 itself is prevented. . For this reason, the bending operation device 20 prevents a decrease in braking force that brakes the rotation of the rotation shaft 36 without changing the pressing force from the cam 46 to the rotation shaft 36 that is the drive shaft of the pulley 25. . Further, since the bending operation device 20 is configured to press the outer peripheral surface of the C-ring 45 while the O-ring 47 is elastically deformed, the amount of braking force exerted by the cam 46 on the rotating shaft 36 due to an assembly error at the time of manufacture is reduced. Variations are less likely to occur and there is an advantage that the braking force to the rotation shaft 36 is stabilized. Furthermore, since the O-ring 47 is inexpensive and can be easily attached to the cam 46, if the O-ring 47 is worn, it can be easily replaced at a low cost.

(First modification)
As shown in FIG. 10, a plate member 61, which is a metal elastic plate material, which is a wear preventing means here, may be provided between the cam 46 and the C ring 45. Specifically, the cam 46 here is configured such that the above-described circumferential groove 46a is not formed and the O-ring 47 is not provided. As shown in FIGS. 11 and 12, the housing main body 22 has two groove portions 30 a communicating with the cam housing chamber 30 formed linearly on opposing wall surfaces that form the cam housing chamber 30. A plate member 61 is installed in the cam housing chamber 30 so that the end portions are inserted into the groove portions 30a. The groove portions 30 a are set such that the groove width is larger than the thickness of the plate member 61, and a predetermined clearance is provided with respect to the plate member 61.

  In such a configuration, as described above, when the cam 46 is rotated in one direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, as shown in FIG. The outer peripheral portion of the cam 46 comes into contact so as to push the plate member 61 toward the outer peripheral surface of the C ring 45, and a part of the outer peripheral surface of the C ring 45 is pressed to the inner peripheral side via the plate member 61. At this time, the plate member 61 is curved and deformed toward the C ring 45 by the cam 46, and linearly presses the outer peripheral surface of the C ring 45 inward. Thereby, the rotation of the rotation shaft 36 is braked with a predetermined amount of force.

  On the other hand, as described above, when the cam 46 is rotated in the other direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, as shown in FIG. Separated from the plate member 61. At this time, the plate member 61 is substantially linear and is not in contact with the C-ring 45. Thereby, the braking with respect to the rotation shaft 36 is released.

  By providing the plate member 61, the bending operation device 20 indirectly applies the pressing force from the cam 46 via the plate member 61 without directly applying wear caused by rubbing against the cam 46 to the C ring 45. It is transmitted to the C ring 45. Thereby, also with such a configuration, the bending operation device 20 can obtain the same effects as described above. Further, the plate member 61 is also inexpensive and has an advantage that it can be easily replaced. Note that the bending operation device 20 may be configured to be provided with a wear preventing means provided with the plate member 61 of the present configuration and configured as the cam 46 having the O-ring 47.

(Second modification)
Further, as shown in FIG. 13, a recessed notch 62 may be formed on a part of the inner periphery of the C-ring 45 as a wear preventing means here. Specifically, the cam 46 here is also configured such that the above-described circumferential groove 46a is not formed and the O-ring 47 is not provided. The notch 62 has a predetermined length in the circumferential direction (for example, with respect to the area where the cam 46 abuts) on the inner circumferential portion of the C ring 45 that is symmetrical to the outer periphery of the C ring 45 against which the cam 46 abuts. 2 to 3 times longer) and the depth toward the outside.

  Even in such a configuration, when the cam 46 is rotated in one direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, as shown in FIG. The portion directly contacts the outer peripheral surface of the C ring 45 and presses a part of the outer peripheral surface of the C ring 45 toward the inner peripheral side. At this time, the C-ring 45 is elastically deformed by the cam 46 without the portion in which the notch 62 is formed contacting the rotation shaft 36, and the inner peripheral portion contacting the rotation shaft 36 is the rotation shaft 36. Press the outer peripheral surface. Thereby, the rotation of the rotation shaft 36 is braked with a predetermined amount of force.

  On the other hand, as described above, when the cam 46 is rotated in the other direction around the eccentric shaft 50 through an operation input to the bending lock lever 16 by an operator or the like, as shown in FIG. Separated from the C-ring 45.

  As described above, the C-ring 45 here is more elastically deformed by forming a recess-shaped notch 62 on the inner side of the portion pressed against the cam 46 to reduce the thickness. This prevents wear caused by the cam 46 rubbing. Thereby, even if it is the above structures, the bending operation apparatus 20 can acquire the effect similar to the above-mentioned. The bending operation device 20 may also be provided with the plate member 61 of this configuration and may be the cam 46 having the O-ring 47, or in addition, the plate member 61 may be provided and provided with wear prevention means. Also good.

(First reference example)
Here, a first reference example of the configuration of the endoscope 1 will be described with reference to FIGS. 16 to 19. 16 to 19 relate to a first reference example of the endoscope 1, and FIG. 16 is a front view partially showing a state in which a suction valve is mounted on the operation unit body of the endoscope. FIG. 18 is a perspective view partially showing a state in which the suction valve is attached to the operation portion main body of the endoscope, FIG. 18 is a perspective view partially showing a state in which the suction valve is removed from the operation portion main body of the endoscope, FIG. 19 is a side view partially showing a state in which the suction valve is mounted on the operation unit body of the endoscope.
In the description of this reference example, the components described in the above-described first embodiment are denoted by the same reference numerals, and descriptions of these components and operations are omitted.

  The endoscope 1 of the present reference example has a function of performing a suction operation using a suction valve 70 as shown in FIGS. 16 to 19 in order to suck body fluid and the like. 3 is detachable from the operation unit main body 11. The suction valve 70 has an arm 72 that extends from the valve main body 71 and is connected to a suction tube (not shown). The arm 72 is communicated with a suction control device (not shown) via the suction tube.

  Further, the case main body 13 of the operation section main body 11 has a female connector-like valve mounting cylinder portion 73 that can be fitted in and attached in an airtight manner by screwing the suction valve 70 (see FIG. 18). . Further, the case body 13 is formed with an inclined surface 73a that guides the cylinder portion 73 for attaching the valve so that it can be easily removed by rotating the attached suction valve 70 from the right side to the upper side here. .

  The suction valve 70 is attached to the cylinder portion 73 of the case body 13 so that the arm 72 extends rightward when the operation portion body 11 is viewed from the front. Then, when the arm 72 is rotated counterclockwise so that the arm 72 moves upward, the suction valve 70 is guided in a state in which the arm 72 is in contact with the inclined surface 73 a and pushed forward, and the suction from the cylinder portion 73. It comes out easily.

  Incidentally, the posture of the endoscope 1 is changed when the operation unit 3 is tilted or rotated during use. At this time, depending on the posture of the operation unit 3, the suction valve 70 may be pulled by the tube connected to the arm 72 and unintentionally detached from the cylinder unit 73 of the case body 13. For this reason, the case main body 13 of the operation section main body 11 is formed with an arc-shaped protrusion 13a extending downward from the right side portion of the cylinder portion 73 in this case. When the suction valve 70 is mounted on the operation unit main body 11, the protrusion 13a is in contact with the arm 72 and holds the suction valve 70 so as not to rotate clockwise. That is, the suction valve 70 is configured such that the arm 72 is in contact with the protrusion 13a and the downward rotation is restricted, and the case body 13 is not inadvertently detached from the valve mounting cylinder 73 during the case. ing.

(Second reference example)
Next, a second reference example of the configuration of the endoscope 1 will be described with reference to FIGS. 20 to 24 relate to the second reference example of the endoscope 1, FIG. 20 is a top view showing the configuration of the suction valve, and FIG. 21 is a diagram showing the suction valve mounted on the operation unit body of the endoscope. FIG. 22 is a partial cross-sectional view when the suction valve is removed from the operation part body of the endoscope, FIG. 23 is a partial cross-sectional view when the suction valve is removed from the operation part body of the endoscope, FIG. 24 is a partial cross-sectional view when the ring member is removed from the operation portion main body of the endoscope.
Also in the description of this reference example, the same reference numerals are given to the components described in the first embodiment and the first modification described above, and the description of these components and operations will be given. Omitted.

  As shown in FIGS. 20 and 21, the suction valve 70 of this modification is located on the valve body 71 side of the arm 72, and an annular ring member 75 having a predetermined gap on the outer periphery of the valve body 71. Is provided. The ring member 75 has a connecting portion 76 that extends downward along the valve main body 71 on the side opposite to the arm 72, and this connecting portion 76 is connected to the outer peripheral portion of the valve main body 71 and two thin walls. The valve main body 71 and the valve body 71 are integrally formed by a connection piece 76a. A claw portion 77 is provided at the lower end portion of the connection portion 76.

  The cylinder part 73 provided in the case main body 13 of the operation part main body 11 here is in a position where the claw part 77 is fitted when the suction valve 70 is engaged with and attached to the hole-shaped female connector part 73c. A recessed groove 13c is formed. In other words, the suction valve 70 is not inadvertently detached from the valve mounting cylinder portion 73 of the case body 13 during the case by fitting the claw portion 77 into the groove portion 13c of the cylinder portion 73 for valve mounting. It is configured.

  Note that when the suction valve 70 is mounted on the cylinder portion 73, the O-ring 71 a that holds and hermetically contacts the inner peripheral wall of the female connector portion 73 c has an outer periphery of the valve body portion 71 below the claw portion 77. Provided in the department.

  And when removing the suction valve 70 of this reference example from the cylinder part 73, as shown in FIG. 22, the ring member 75 is lifted and the thin connection piece 76a is fractured | ruptured. Thereby, as shown in FIG. 23, the suction valve 70 can be easily extracted from the cylinder portion 73. Further, as shown in FIG. 24, the claw portion 77 is removed from the groove portion 13c, and the ring member 75 remaining in the cylinder portion 73 is taken out.

  The suction valve 70 configured as described above has a structure in which the ring member 75 provided with the claw portion 77 fitted in the groove portion 13c so as not to be detached from the cylinder portion 73 can be separated from the valve body 71 after use. As above, it can be easily detached from the cylinder part 73 of the operation part 3. Further, since the used suction valve 70 is in a state in which the ring member 75 is intentionally removed (broken), the used suction valve 70 cannot be reused once used, and can be easily distinguished from unused ones. There is an advantage.

(Third reference example)
Next, a third reference example of the configuration of the endoscope 1 will be described with reference to FIGS. 25 to 31 relate to the third reference example of the endoscope 1, FIG. 25 is a top view showing the configuration of the suction valve, FIG. 26 is a front view showing the configuration of the suction valve, and FIG. 28 is a side view showing the configuration of the valve, FIG. 28 is a plan view showing the configuration of the cylinder portion for attaching the valve provided in the operation portion, and FIG. 29 is a developed sectional view showing the configuration of the cam groove formed in the cylinder portion. 30 is a cross-sectional view taken along the line XXX-XXX in FIG. 29, and FIG. 31 is a cross-sectional view illustrating a state in which the suction valve is mounted on the operation unit body of the endoscope.
Also in the description of this reference example, the same reference numerals are given to the components described in the first embodiment and the respective modifications, and the description of these components and operations is omitted. .

  As shown in FIGS. 25 to 31, the suction valve 70 of the present modification does not include the annular ring member 75 of the second modification, and only the connection portion 76, the connection piece 76 a, and the claw portion 77 are valves. The main body 71 is arranged on one side periphery.

  Here, the claw portion 77 has a rhombic plate shape so as to have an acute angle with respect to the mounting direction of the suction valve 70, and the plate surface has an angle in the outer peripheral direction of the valve body 71, It is inclined so as to generate an elastic force (biasing force).

  Further, as shown in FIGS. 28 and 29, a groove portion 80 is formed in a predetermined range along the outer periphery of the valve mounting cylinder portion 73 provided in the case main body 13 here. The groove portion 80 has an opening 80a at one end portion and a groove end surface 81 at the other end portion, and an upper surface portion 82 and a lower surface portion 83 inclined so as to gradually spread around a predetermined circumference. In addition, as shown in FIG. 30, in the groove 80, the width W2 of the lower surface 83 is wider than the width W1 of the upper surface 82 (W1 <W2).

  When the suction valve 70 is attached to the cylinder portion 73 in which the groove portion 80 is formed, first, the claw portion 77 of the suction valve 70 is engaged with the opening portion 80a of the groove portion 80. Then, the suction valve 70 is rotated along the groove 80 while being pressed in the direction of the depth of the cylinder portion 73.

  At this time, as shown in FIG. 31, when the suction valve 70 is rotated, the lower end of the claw portion 77 slides along the lower surface portion 83 of the groove portion 80. Then, when the suction valve 70 is rotated until the end portion in the rotation direction of the claw portion 77 hits the groove end surface 81 of the groove portion 80 so as to be pushed inward to the valve main body 71 side, The upper end abuts against the upper surface part 82 of the groove part 80. That is, the claw portion 77 constitutes a cam, and the groove portion 80 constitutes a cam groove.

  In this state, since the claw portion 77 generates an urging force outwardly in the groove portion 80 and presses the groove wall, the suction valve 70 is fixed so as not to be carelessly removed from the cylinder portion 73 during the case. If the suction valve 70 is pulled out, the connecting piece 76 a is broken, the valve main body 71 and the claw portion 77 are divided, and the suction valve 70 can be easily detached from the cylinder portion 73.

  If the suction valve 70 configured as described above is rotated by the cam mechanism by the claw portion 77 and the groove portion 80 until it is stopped when mounted on the cylinder portion 73, it has been attached at an appropriate position. It has a configuration that can be recognized.

(Fourth reference example)
Next, a reference example of a medical syringe used for an endoscope will be described with reference to FIG. FIG. 32 is a partial cross-sectional view illustrating a configuration of a medical syringe used for an endoscope according to the fourth reference example.

  As shown in FIG. 32, the syringe 90 is one of the medical treatment tools used for the endoscope 1 for bronchi, for example. The syringe 90 is provided with a lever 93 that has a predetermined step force in the outer diameter direction and can be elastically deformed in a piston 92 provided with a packing 91. On the outer surface of the lever 93, a saw-like unevenness 93a is formed. Further, a saw-like unevenness 94 a that engages with the unevenness 93 a of the lever 93 is formed on the inner surface of the cylinder 94 of the syringe 90. These irregularities 93a and 94a are set so that the piston 92 moves at a predetermined distance by shifting the engagement thereof by a predetermined number, and a predetermined liquid amount can be discharged.

  In the syringe 90 having such a configuration, when the liquid (gas) is injected into the cylinder 94, the piston 92 is pulled while pushing the lever 93 in the inner diameter direction on the piston 92 side. When the syringe 90 ejects the liquid injected into the cylinder 94, the syringe 90 can discharge a specified unit amount of liquid due to the click feeling caused by the protrusions 93a of the lever 93 and the protrusions 94a of the cylinder 94.

  The syringe 90 configured as described above is configured such that the liquid (gas) in the cylinder 94 can be discharged by a predetermined amount by a click feeling without looking at the scale attached to the cylinder 94. Yes. Furthermore, the syringe 90 is configured such that unless the lever 93 is pushed into the piston 92, the piston 92 cannot be pulled out, and an unintended reverse flow of liquid (gas) into the cylinder 94 can be prevented. Thereby, the syringe 90 can be set as the structure which does not require a stopcock, a reverse branch valve, etc. separately.

(Fifth reference example)
Next, a reference example of the light source device to which the endoscope is connected and the endoscope hanger will be described with reference to FIG. FIG. 33 is a diagram schematically showing a camera control unit and a monitor to which an endoscope is hooked on an endoscope hanger and connected to the endoscope according to the fifth reference example.

  By the way, if the light guide provided in the endoscope 1 continues to use the endoscope 1 under X-ray fluoroscopy, the amount of transmitted light decreases and the illumination light becomes dark. When a certain strong light is incident on the light guide from this state, the light guide whose transmitted light amount is reduced is restored to a normal state.

  Therefore, in this reference example, the endoscope 1 is an endoscope hanger on which the root portion of the universal cord 4 extended from the operation unit 3 is hooked as shown in FIG. A detection unit 96 that is a switch, for example, is provided to detect that the endoscope 1 is hooked at 95. The endoscope hanger 95 can output a detection signal from a camera control unit (CCU) 97 having a video processor and a light source to which the endoscope 1 is connected via the universal cord 4 and a detection unit 96. Electrically connected.

  The camera control unit 97 is connected to a monitor 98 that displays an endoscopic image. The camera control unit 97 is provided with a standby switch 97a. When the standby switch 97a is turned on, the internal light source level is increased and a strong amount of light is supplied to the light guide of the endoscope 1. Is done.

  The endoscope hanger 95 and the camera control unit 97 configured as described above are configured such that when the endoscope 1 is hooked on the endoscope hanger 95, the camera control unit 97 to which the detection signal of the detection unit 96 is input is stored. A strong light amount is supplied to the light guide of the endoscope 1.

  At this time, the camera control unit 97 performs control so that an endoscopic image is not displayed on the monitor 98. Further, the control unit 97 may display characters on the monitor 98 so that the standby mode can be recognized.

  When the endoscope 1 is removed from the endoscope hanger 95, the detection signal output from the detection unit 96 stops, and the camera control unit 97 supplies a strong light amount to the light guide of the endoscope 1. To stop.

  In this way, the operator or the like uses the endoscope 1 whose illumination light amount has decreased due to use under fluoroscopy, etc., to turn on the standby switch 97a of the camera control unit 97 and hook the endoscope 1 on the endoscope hanger 95. If so, the amount of light transmitted through the internal light guide can be recovered. In addition, when the endoscope 1 is not used during a case under fluoroscopy, if it is hooked on the endoscope hanger 95, a strong light amount of light is supplied to the light guide and the transmitted light amount is reduced. Can be prevented.

  The invention described in each of the above-described embodiments (reference examples) is not limited to the contents described in these embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. It is possible. Furthermore, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in the above embodiments, the stated requirements can be solved if the stated problems can be solved and the stated effects can be obtained. The deleted configuration can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Insertion part 3 ... Operation part 4 ... Universal code 5 ... Hard part 6 ... Bending part 7 ... Tip part 10 ... Grasping part 10a ... Treatment instrument channel opening part 11 ... Operation part main body 12 ... Exterior case 13 ... Case body 13L, 13R ... Openings 14L, 14R ... Cover 15 ... Bending operation lever 15a ... Lever body 15b ... Finger rest 15c ... Ridge 16 ... Bending lock levers 17a, 17b ... Indicator plate 19 ... Operation wire 20 ... Bending Operating device 21 ... Housing 22 ... Housing body 23 ... Plate body 23a ... Hole 24 ... Screw member 25 ... Pulley 25a ... Recess 26 ... Lock mechanism 27 ... Pulley housing chamber 27a ... Wire insertion port 28 ... Lock mechanism housing chamber 29 ... Ring Storage chamber 30 ... Cam storage chamber 31 ... Pulley bearing hole 32 ... Cam bearing hole 33 ... Stopper body 35 ... Engaging groove 36 ... Rotating shaft 37 ... Guide groove 38 ... Notch 39 ... Wire retaining chamber 40 ... Ditch 41 ... Spacer 42 ... Cover 43 ... Fixing screw 44 ... Fixing block 44a ... Screw hole 44b ... Screw 45 ... C ring 45a ... Notch 46 ... Cam 46a ... Circumferential groove 46b ... Outer edge Portion 47 ... O-ring 50 ... Eccentric shaft 55 ... Partition plate 56 ... Guide fitting 57 ... Frame 58, 59 ... Screw 60 ... Fixing column

Claims (4)

A bending operation device for operating a bending portion of an endoscope,
A rotating member that winds an operation wire connected to the bending portion around the periphery, and pulls or relaxes the operation wire by rotation;
A rotating shaft that rotates integrally with the rotating member;
A ring-shaped braking member that is rotatably disposed on the outer periphery of the rotating shaft and capable of slidingly contacting the inner peripheral surface with the outer peripheral surface of the rotating shaft by elastic deformation;
Changing operation to a first position for applying a pressing force to the outer peripheral portion of the braking member and elastically deforming inward to brake the rotation of the rotating shaft or a second position for releasing the pressing on the braking member A pressing member,
Wear prevention means for preventing wear of the braking member and the pressing member during braking of the rotating shaft;
With
The bending operation device according to claim 1, wherein the wear prevention means includes a thin portion formed on an inner peripheral portion of an outer peripheral portion provided on the braking member and to which the pressing force from the pressing member is applied.   The bending operation device according to claim 1, wherein the thin portion is formed by a recessed notch provided in an inner peripheral portion of an outer peripheral portion to which the pressing force is applied.   The wear preventing means is disposed on the pressing member, and is in non-contact with the braking member when the pressing member is in the first position, so that the pressing force from the pressing member abuts on the braking member. The bending operation device according to claim 1, further comprising an elastic member to be provided.   The wear preventing means is interposed between the pressing member and the braking member, and makes the pressing force from the pressing member non-contact with the braking member when the pressing member is at the first position. The bending operation device according to claim 1, further comprising a plate member that abuts against the braking member.

Images