Endoscope

Abstract

The present application provides an endoscope capable of improving the operability for changing the field of view direction. A grip portion (22) of the present application has a first flat surface portion (200) parallel to the axial direction of an insertion shaft (Ax) at a portion of the outer surface of the grip portion (22), a knob (36) has a finger rest portion (220) and a pair of finger abutting portions (222, 224), and the finger rest portion (220) is provided at a position directly opposite the first flat surface portion (200) in the axial direction of the insertion shaft (Ax) when the knob (36) is located at a reference position serving as a reference for the position around the shaft direction (B) with respect to the grip portion (22).

Description

Technical Field

[0001] This invention relates to an endoscope having an insertion portion. Background Technology

[0002] Rigid endoscopes are known as endoscopes used for endoscopic surgery. Furthermore, among these rigid endoscopes, squinting endoscopes are known that have their field of view (observation direction) set at the angle forward relative to the insertion axis of the insertion portion. The squinting endoscope includes an insertion portion that is inserted into the patient and an operating portion connected to the base of the insertion portion. Among such squinting endoscopes, Patent Document 1 describes a squinting endoscope capable of changing the field of view direction.

[0003] The oblique scope described in Patent Document 1 includes an endoscope axis, a juxtaposed handle, and a rotating wheel. An optical system is disposed at the distal end of the endoscope axis. When changing the direction of the field of view, while holding the rotating wheel and maintaining a horizontal position for displaying the image, the endoscope axis is rotated around its axis by the juxtaposed handle. As a result, the field of view of the optical system rotates about the axis of the endoscope axis.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2018-32014

[0005] However, in the strabismus described in Patent Document 1, as an operation for changing the direction of the field of view, in order to rotate the endoscope axis (insertion part) in the direction of the axis, it is necessary to rotate the operating handle with the right hand while holding the rotating wheel (holding part) located at the front end of the juxtaposition handle (rotation operation part) with the left hand. Since both hands must be used, there is a problem of difficulty in operation. Summary of the Invention

[0006] The present invention was made in view of this situation, and its object is to provide an endoscope that can improve operability for changing the direction of the field of view.

[0007] An endoscope for achieving the purpose of the present invention includes: an insertion part having an optical system provided at its front end and being rotatable in a direction about an insertion axis; and an operation part connected to the base end side of the insertion part. In the endoscope, the operation part has: a gripping part extending axially along the insertion axis; and a rotation operation member disposed between the gripping part and the insertion part, and configured to rotate freely relative to the gripping part, causing the insertion part to rotate in a direction about an axis. The gripping part has a first planar portion along the insertion axis on a portion of its outer surface. The rotation operation member has a finger support portion capable of supporting a finger and a pair of finger abutment portions disposed on both sides of the finger support portion in a direction about an axis. When the rotation operation member is located at a reference position that serves as a reference for the position of the gripping part in a direction about an axis, the finger support portion is positioned axially opposite to the first planar portion.

[0008] According to one aspect of the invention, preferably, the first planar portion is formed along the axial direction of the insertion shaft from the front end of the gripping portion to the base end.

[0009] According to one aspect of the invention, the first flat portion preferably has a first mark, and the finger support portion has a second mark. When the rotating operating component is in the reference position, the first mark and the second mark are arranged on the same line along the axial direction.

[0010] According to one aspect of the present invention, the first and second markings are preferably convex portions.

[0011] According to one aspect of the invention, the protrusion is preferably a raised strip formed along the same line.

[0012] According to one aspect of the invention, preferably, the gripping portion has a second planar portion parallel to the first planar portion at a position on the outer surface of the gripping portion opposite to the first planar portion, separated by the insertion shaft.

[0013] According to one aspect of the invention, it is preferable that the rotating operating component has a third mark at a position different from the position of the second mark, indicating the position relative to the axial direction of the gripping part.

[0014] According to one aspect of the invention, the third mark is preferably a recess.

[0015] According to one aspect of the invention, the recess is preferably a recessed strip formed along the axial direction.

[0016] According to one aspect of the invention, the rotating operating member is preferably configured to rotate between a first rotating position and a second rotating position in the axial direction relative to the gripping part, with the reference position being the central position between the first rotating position and the second rotating position.

[0017] According to one aspect of the present invention, the insertion part preferably has a camera part for capturing light passing through the optical system. When the direction representing the up and down of the image formed by the camera signal output by the camera part in the direction perpendicular to the axial direction is set as the up and down direction, the first flat part is formed at the upper side of the outer surface of the holding part in the up and down direction and is formed as a surface perpendicular to the up and down direction.

[0018] According to one aspect of the invention, the insertion portion preferably has a camera portion for capturing light passing through the optical system. The camera portion's imaging direction is a direction inclined relative to the insertion axis. When the rotating operation member is in a reference position, the camera portion's imaging direction includes a component in the direction opposite to the normal direction of the first planar portion.

[0019] According to one aspect of the present invention, the insertion part preferably includes: an outer tube; an outer cylinder, inserted into the outer tube, and having an optical system provided at its front end, which is capable of rotating integrally with the outer tube along the insertion axis of the insertion part in a direction about the axis; and an inner cylinder, inserted into the outer cylinder, and having an imaging unit provided at its front end for capturing light passing through the optical system, which is capable of rotating relative to the outer cylinder in a direction about the axis.

[0020] Invention Effects

[0021] This invention improves operability for changing the direction of view. Attached Figure Description

[0022] Figure 1 This is a structural diagram of an endoscope system equipped with a squint lens.

[0023] Figure 2 This is an enlarged cross-sectional view of the front end of the insertion part.

[0024] Figure 3 This is a cross-sectional view of the main part of the holding section.

[0025] Figure 4 It is a sectional view of the outer cylinder and shell.

[0026] Figure 5 It is an enlarged cross-sectional view of the shell and cylindrical part.

[0027] Figure 6 This is a schematic diagram showing the structure of the rotary stop.

[0028] Figure 7 This is a side view of the operating unit when viewed from the Y(-) direction towards the Y(+) direction.

[0029] Figure 8 This is a top view of the operating unit when viewed from the Z(+) direction towards the Z(-) direction.

[0030] Figure 9 This is a three-dimensional view of the operating unit when viewed from the Z(+) direction.

[0031] Figure 10 This is a three-dimensional view of the operating unit when viewed from the Z(-) direction side. Detailed Implementation

[0032] Figure 1 This is a structural diagram of an endoscope system 12 equipped with a strabismus mirror 10. (See diagram below.) Figure 1 As shown, the endoscope system 12 includes a squinting mirror 10, a processor device 14, a display 16, and a light source device 18. The squinting mirror 10 is an example of the endoscope of the present invention.

[0033] The strabismus mirror 10 is a so-called rigid mirror, which includes an insertion part 20 and an operating part 21 connected to the base end of the insertion part 20. The insertion part 20 is an example of the insertion part of the present invention, and the operating part 21 is an example of the operating part of the present invention. The insertion part 20 is formed in a cylindrical (tubular) shape and is inserted into the patient's body. The insertion part 20 has a front end, a base end, and an insertion shaft Ax, and its outer peripheral wall is formed by an external tube 30 described later. A camera unit 24, described later, is provided at the front end of the insertion part 20. Furthermore, a first signal cable 26 and a light guide 28 are inserted into the insertion part 20.

[0034] The first signal cable 26, together with the second signal cable 27 (described later), connects the camera unit 24 and the processor device 14. The front end of the first signal cable 26 is connected to the camera unit 24, and the base end of the first signal cable 26 is connected to the front end of the second signal cable 27 within the operation section 21. The front end (light emission end face) of the light guide 28 is provided on the front end face of the insertion section 20, and its base end (light incident end face) is connected to the light source device 18. In this example, the first signal cable 26 and the second signal cable 27 are illustrated as multi-core cables, which bundle multiple bare wires (signal lines) together, with a shielding conductor surrounding them, and house them within a cylindrical outer sheath.

[0035] The light guide 28 has a light emitting end 28C on its front end side (reference). Figure 2 The light emitting end 28C is disposed on the front end side of the outer casing 30. Furthermore, the light guide 28 has a light incident end (not shown) on its base end side, which is connected to the light source device 18. As the light guide 28, for example, a structure is adopted in which multiple optical fibers are bundled into a single optical cable, and it is flexible.

[0036] The operating unit 21 is connected to the base end of the insertion unit 20. The operating unit 21 is held by the surgeon operating the strabismus mirror 10, and receives information from the surgeon regarding the direction of the field of view (observation direction, imaging direction, reference direction) of the strabismus mirror 10. Figure 2 The rotation operation involves rotating the insertion part 20 and the operation part 21 circumferentially along the optical axis OA and the insertion axis Ax in the axial direction B. The operation part 21 consists of a tubular gripping part 22 held by the surgeon and a cylindrical (ring-shaped) knob 36 for rotational operation in the direction of the receiving field of view. The gripping part 22 is an example of the gripping part of the present invention, and the knob 36 is an example of the rotational operation component of the present invention. Furthermore, the specific configuration of the gripping part 22 and the knob 36, considering operability, will be described later.

[0037] The grip 22 extends axially from the base end of the insertion part 20 toward the insertion shaft Ax, and the outer tube 30 is supported at the front end of the grip 22 in a manner that allows it to rotate about the axis B. In this example, the grip 22 is sized to fit the surgeon's hand and is made of a rubber or resin material that can withstand autoclaving. Examples of such rubber materials include silicone rubber and fluororubber. Examples of such resin materials include PPSU (Polyphenylsulfone) and PEEK (Polyether ether ketone). Therefore, compared to grips made of metal, the grip 22 is less likely to slide in the hand, i.e., it is less likely to rotate about the axis B.

[0038] A knob 36 is disposed between the handle 22 and the insertion part 20, and is fixed to the base end of the outer tube 30. The knob 36 is configured to rotate freely relative to the handle 22, thereby allowing the outer tube 30 to rotate relative to the handle 22 in the axial direction B. By rotating the outer tube 30 using the knob 36, the field of view direction (observation direction, photographic direction, reference direction) of the oblique scope 10 can be adjusted. Figure 2 The optical axis OA rotates along the axis direction B.

[0039] Details about the gripping part 22 will be described later. It contains an airtight space and a non-airtight space. The base end of the first signal cable 26 and the front end of the second signal cable 27 are connected at the boundary between the two spaces (see reference). Figure 3 Thus, the camera unit 24 and the processor device 14 are electrically connected via the first signal cable 26 and the second signal cable 27.

[0040] The processor device 14 generates an observation image (moving image) inside the patient's body based on the camera signal input from the camera unit 24 via the first signal cable 26 and the second signal cable 27, and displays the observation image on the display 16.

[0041] The light source device 18 supplies illumination light to the light guide 28. Thus, light is emitted from the light guide 28 (reference point 28C) located at the front end of the outer casing 30. Figure 2 ) emits illuminating light.

[0042] Figure 2 This is an enlarged cross-sectional view of the front end of the insertion part 20. (See attached image.) Figure 2 As shown, the insertion part 20 includes a generally tubular outer tube 30, an outer cylinder 32, and an inner cylinder 34, all parallel to the insertion axis Ax. The outer tube 30 forms the outer peripheral wall of the insertion part 20. The opening at the front end of the outer tube 30 is inclined from a position perpendicular to the insertion axis Ax. The outer tube 30 is an example of the outer tube of the present invention.

[0043] The outer cylinder 32 is inserted into the outer mounting tube 30. The front optical system 40 of the camera unit 24 is provided on the front end side of the outer cylinder 32. Furthermore, details regarding the base end side of the outer cylinder 32 will be described later, at the holding part 22 (see reference). Figure 3 The interior of ) and the tubular shell 74 (reference) Figure 3 Furthermore, a space 31 for arranging the light guide 28 is formed between the inner circumferential surface of the outer tube 30 and the outer circumferential surface of the outer cylinder 32. The light guide 28 is inserted into the space 31 and fixed to the inner circumferential surface of the outer tube 30 and the outer circumferential surface of the outer cylinder 32. The outer cylinder 32 is an example of the outer cylinder of the present invention.

[0044] The inner cylinder 34 is inserted into the outer cylinder 32. A first signal cable 26 is inserted inside the inner cylinder 34. A base-end optical system 50 and an imaging unit 60 constituting the camera unit 24 are provided on the front end side of the inner cylinder 34. Further details regarding the base end side of the inner cylinder 34 will be described later. (See reference 22). Figure 3 The interior and connecting parts 90 (reference) Figure 3 (Connection). The inner cylinder 34 is an example of the inner cylinder of the present invention.

[0045] like Figure 2 As shown, the camera unit 24 includes a front-end optical system 40, a base-end optical system 50, and an imaging unit 60. Furthermore, the symbol OA in the figure represents the optical axis of the optical system of the camera unit 24 (objective lens 48a described later), indicating the imaging direction of the imaging unit 60. The optical axis OA is set in a direction inclined relative to the insertion axis Ax.

[0046] A front-end optical system 40 is disposed on the front end side of the outer tube 32. The front-end optical system 40 is an oblique-view optical system that refracts light incident from a direction inclined relative to the insertion axis Ax in a direction parallel to the insertion axis Ax and guides it to the base-end optical system 50. The front-end optical system 40 includes a front end body 42 and a front end lens tube 44 disposed on the front end body 42. The front-end optical system 40 is an example of the optical system of the present invention.

[0047] The front end body 42 forms the front end of the insertion part 20 (outer tube 32) and is a cover that covers the front end tube 44. Furthermore, the front end body 42 is formed into a generally tubular shape parallel to the insertion axis Ax. Moreover, a cover glass 46 with an inclined posture corresponding to the tilt angle of the objective lens 48a inside the front end tube 44 is provided at the opening on the front end side of the front end body 42.

[0048] Furthermore, the front end body 42 is fixed to the inner circumferential surface of the outer tube 30. Thus, if the outer tube 30 rotates in the axial direction B, the front optical system 40 and the outer tube 32 rotate integrally with the outer tube 30 in the axial direction B.

[0049] The front lens barrel 44 houses an objective lens 48a, a prism 48b, and a lens 48c. The objective lens 48a is tilted at a position perpendicular to the insertion axis Ax and faces the cover glass 46. The objective lens 48a directs light incident through the cover glass 46 towards the prism 48b. The prism 48b refracts the light incident from the objective lens 48a (i.e., light incident in a direction tilted relative to the insertion axis Ax) towards a direction parallel to the insertion axis Ax, and then directs it towards the lens 48c. The lens 48c, positioned perpendicular to the insertion axis Ax, directs light incident from the prism 48b towards the lens 56 within the base lens barrel 52 of the base optical system 50. Furthermore, the structure of the optical system within the front lens barrel 44 is not particularly limited as long as it guides light incident in a direction tilted relative to the insertion axis Ax into the base lens barrel 52.

[0050] A cylindrical portion 45 extending from its base end is formed on the front end lens barrel 44. The cylindrical portion 45 is externally fitted to the front end of the base end lens barrel 52 in a manner that allows it to rotate relative to the front end lens barrel 4 ...

[0051] The base-end optical system 50 is disposed at the front end of the inner barrel 34 and guides the light incident from the front end lens barrel 44 to the imaging unit 60. The base-end optical system 50 includes a base end lens barrel 52, a bracket 54, and a prism 55.

[0052] The base end of the base end tube 52 is fixed to the front end of the inner tube 34 via a bracket 54. Furthermore, as described above, the front end of the base end tube 52 is fitted into the opening at the base end of the cylindrical portion 45 in a manner that allows relative rotation along the axial direction B. Thus, the other end can rotate relative to either the front end tube 44 or the base end tube 52 along the axial direction B. Consequently, the inner tube 34, inserted into the outer tube 32, can rotate relative to the outer tube 32 along the axial direction B.

[0053] Multiple lenses 56 with optical axes parallel to the insertion axis Ax are disposed within the base lens barrel 52. Each lens 56 directs light incident from the front lens barrel 44 toward the prism 55.

[0054] The bracket 54 is formed as a generally tubular shape parallel to the insertion axis Ax and is fixed to the front end of the inner cylinder 34. Furthermore, the bracket 54 is externally fitted and fixed to the base end of the base end lens barrel 52. Thus, since the inner cylinder 34 and the base end lens barrel 52 are connected via the bracket 54, the inner cylinder 34, the bracket 54, and the base end lens barrel 52 can rotate relative to the outer cylinder 32 integrally along the axial direction B.

[0055] A prism 55 is held at the opening on the base end side of the bracket 54, and a camera unit 60 is further held via the prism 55. Therefore, the camera unit 60 can rotate relative to the inner cylinder 34 and the base end lens tube 52 in the axial direction B, integrally with respect to the outer cylinder 32, via the prism 55 and the bracket 54.

[0056] Prism 55 refracts light incident through base tube 52 by 90 degrees. Alternatively, a reflector can be used instead of prism 55.

[0057] The camera unit 60 captures light (observation image) that passes through the front-end optical system 40 and the base-end optical system 50 and is reflected by the prism 55. The camera unit 60 includes an image-capturing element 64 and a circuit board 66. The camera unit 60 is an example of the camera unit of the present invention.

[0058] The image sensor 64 is fixed on the prism 55 while being mounted on the circuit board 66, and is mounted on the bracket 54 via the prism 55. The image sensor 64 then captures the light refracted by the prism 55 and outputs an image signal. The image sensor 64 uses a CCD (Charge Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image sensor.

[0059] The circuit board 66 controls the driving of the camera element 64. Furthermore, the front end of the first signal cable 26 is connected to the circuit board 66 via a connector 68. Then, the circuit board 66 outputs the camera signal from the camera element 64 to the first signal cable 26 via the connector 68.

[0060] Figure 3 This is a cross-sectional view of the main part of the holding part 22. (Example) Figure 3 As shown, the holding part 22 is configured as a tube parallel to the insertion axis Ax.

[0061] A knob 36, fixed to the base end of the outer tube 30, is provided at the front end of the grip 22. As an example, the knob 36 is configured to rotate on the outer peripheral surface of the front end of the grip 22 via a sealing ring 38. Thus, the knob 36 is configured to rotate relative to the grip 22 in the axial direction B. By rotating the knob 36 in the axial direction B, the outer tube 30 rotates relative to the grip 22 in the axial direction B, and then the outer tube 32 and the front optical system 40 (see reference) rotate in the axial direction B. Figure 2 The front end body 42 and the front end lens tube 44 are rotated integrally in the same direction via the outer mounting tube 30. As a result, the field of view (observation direction, photographing direction) of the oblique mirror 10 can be changed.

[0062] The base ends of the outer cylinder 32 and the inner cylinder 34 are inserted into the interior of the gripping part 22 through the opening at the front end of the gripping part 22. Furthermore, a [missing information - likely a connector or component] is connected to the base end of the gripping part 22. Figure 1 The external cable 72 shown is integrally formed with the holding part 22 at its front end. Furthermore, a second signal cable 27 and a light guide 28 are inserted inside the external cable 72.

[0063] Return to Figure 3 A light guide insertion space 70 is formed inside the holding part 22. Furthermore, a housing 74 is disposed inside the holding part 22. The housing 74 is positioned further forward than the light guide insertion space 70.

[0064] Next, the structure for inserting and configuring the first signal cable 26 and the second signal cable 27 inside the gripping part 22 will be described.

[0065] like Figure 3 As shown, the housing 74 is formed as a generally tubular shape parallel to the insertion shaft Ax, with a diameter smaller than the inner diameter of the gripping portion 22, and is housed inside the gripping portion 22. The housing 74 is connected by the outer cylinder 32 and the external cable 72 (see reference). Figure 1 The outer tube 30 is supported within the internal space of the gripping part 22. The front end of the housing 74 is connected to the base end of the outer tube 32. Thus, if the outer tube 30 is rotated relative to the gripping part 22 in the direction about axis B, the rotational force is transmitted to the front optical system 40, the outer tube 32, and the housing 74. As a result, the housing 74 rotates in the same direction as the outer tube 30.

[0066] The base end of the inner cylinder 34 and the base end of the first signal cable 26 are disposed inside the housing 74. Furthermore, a partition wall 74a, perpendicular to the insertion shaft Ax, is provided inside the housing 74, for example, within the opening on the base end side of the housing 74. The partition wall 74a blocks the opening on the base end side of the housing 74.

[0067] Furthermore, a cylindrical portion 74b, parallel to the insertion shaft Ax, is provided at the base end of the housing 74. The cylindrical portion 74b can be formed with the same diameter as the housing 74, or with a different diameter. The cylindrical portion 74b can also be integrally formed with the housing 74. In this case, the base end of the housing 74 functions as the cylindrical portion 74b. Inside the housing 74 and the cylindrical portion 74b, in addition to a portion of the connecting portion 84 described later, the front end of the second signal cable 27 is also disposed.

[0068] Figure 4 This is a cross-sectional view of the outer cylinder 32 and the shell 74. (See attached image.) Figure 4 As shown, a sealed space 80 (airtight space) is formed inside the outer cylinder 32 and the shell 74. The inner cylinder 34 and the camera unit 60 (for reference) are arranged inside the sealed space 80. Figure 2 The camera unit 24 (see reference 26) and the first signal cable 26, etc. The front end of the enclosed space 80 is defined by the front-end optical system 40. Furthermore, the base end of the enclosed space 80 is defined by the partition wall 74a. Thus, the camera unit 24 (see reference 26) Figure 2 The moisture resistance of the material is increased, thus preventing fogging and damage.

[0069] Figure 5 This is an enlarged cross-sectional view of the shell 74 and the cylindrical portion 74b. (See attached image.) Figures 3 to 5 As shown, the housing 74 and the cylindrical portion 74b are provided with the described partition 74a, airtight connector 82 and connecting portion 84.

[0070] The airtight connector 82 is configured to rotate relative to the partition wall 74a in the axial direction B to penetrate the inside and outside of the sealed space 80. The airtight connector 82 is electrically connected to the base end of the first signal cable 26 inside the housing 74 (inside the sealed space 80) and the front end of the second signal cable 27 inside the cylindrical portion 74b (outside the sealed space 80). Thus, the first signal cable 26 and the second signal cable 27 are inserted and disposed inside the holding portion 22. In addition, if the first signal cable 26 and the second signal cable 27 can be twisted and deformed in the axial direction B, for example, if the first signal cable 26 and the second signal cable 27 are each composed of multiple separate bare wires, the airtight connector 82 can be fixed to the partition wall 74a.

[0071] The connecting portion 84 is disposed inside the housing 74 and the cylindrical portion 74b, and is capable of relative rotation with respect to the housing 74 and the cylindrical portion 74b in the axial direction B. The first signal cable 26 and the second signal cable 27 are inserted into the connecting portion 84. With the partition wall 74a in between, the connecting portion 84 connects to the base end of the inner cylinder 34 inside the housing 74 (within the sealed space 80), and to the external cable 72 outside the sealed space 80 (see reference). Figure 1 The front-side magnetic connection (connection) of ).

[0072] The connecting part 84 includes a connecting component 90, a bearing support component 92, and a bearing 94. In addition to the aforementioned components, the connecting part 84 also includes a bearing support component 96, a bearing 98, a connecting beam 100, and a magnetic coupling 102.

[0073] The connecting component 90 and the bearing support component 92 are disposed within the housing 74 (within the sealed space 80) and are formed into a generally tubular shape parallel to the insertion shaft Ax. Then, the first signal cable 26 is inserted into the interior of the connecting component 90 and the bearing support component 92.

[0074] The connecting member 90 connects the base end of the inner cylinder 34 and the front end of the bearing support member 92 within the housing 74 (closed space 80). Thus, the front end of the bearing support member 92 is connected to the base end of the inner cylinder 34 via the connecting member 90.

[0075] Regarding the bearing support member 92, its front end is connected to the connecting member 90 as described above, and its base end is fixed to the first magnet 103 of the magnetic coupling 102. Furthermore, a bearing 94, internally connected to the housing 74, is fixed to the outer peripheral surface of the bearing support member 92. Thus, the bearing support member 92 and the first magnet 103 are maintained so that they can rotate relative to the housing 74 in the axial direction B within the housing 74. Additionally, various known radial bearings, such as ball bearings and roller bearings, are used as the bearing 94.

[0076] The bearing support member 96 is disposed inside the cylindrical portion 74b (outside the enclosed space 80). The bearing support member 96 is formed as a generally tubular shape parallel to the insertion shaft Ax, and the second signal cable 27 is inserted inside it.

[0077] Regarding the bearing support member 96, its front end is fixed to the second magnet 104 of the magnetic coupling 102 within the cylindrical portion 74b, and its base end is connected to the connecting beam 100. Furthermore, a bearing 98, internally connected to the cylindrical portion 74b, is fixed to the outer circumferential surface of the bearing support member 96. Thus, the bearing support member 96 and the second magnet 104 are maintained such that they can rotate relative to the cylindrical portion 74b within the cylindrical portion 74b along the axial direction B. Additionally, various known radial bearings can be used as bearing 98, similar to bearing 94.

[0078] like Figure 3 As shown, the connecting beam 100 is configured as a beam extending axially along the insertion axis Ax within the optical guide insertion space 70. Regarding the connecting beam 100, it has a ring portion 100a at its front end and a ring portion 100b at its base end. The ring portion 100a is externally fitted into the base end of the bearing support member 96, and the ring portion 100b is fixed to the external cable 72 (see reference). Figure 1 The front end side of ). As a result, the second magnet 104, connected via the bearing support member 96, and the external cable 72 (reference) are connected via the connecting beam 100. Figure 1 ).

[0079] The magnetic coupling 102 consists of a first magnet 103 disposed within the housing 74 (within the sealed space 80) separated by a partition wall 74a, and a second magnet 104 disposed within the cylindrical portion 74b (outside the sealed space 80). The magnetic coupling 102 is a magnetic connection component that magnetically connects the bearing support member 92 (inner cylinder 34) and the bearing support member 96 (outer cable 72). Furthermore, the first magnet 103 and the second magnet 104 are each disc-shaped with a hole formed at their center. A first signal cable 26 is inserted into the hole of the first magnet 103, and a second signal cable 27 is inserted into the hole of the second magnet 104.

[0080] The inner cylinder 34 and the outer cable 72 (reference) are connected by magnetic coupling 102. Figure 1 ) magnetic connection, thereby enabling torque (static torque, rotational torque) to be transferred from external cable 72 (reference) Figure 1 The signal is transmitted to the inner tube 34. Therefore, when the surgeon operates the outer tube 30 by rotating the knob 36, it is possible to prevent the inner tube 34 (base optical system 50 and camera unit 60) from rotating along the axial direction B with the outer tube 32. That is, the posture of the inner tube 34 in the axial direction B is maintained by the magnetic coupling 102.

[0081] Next, regarding the regulations (restrictions) Figure 1 The rotary stop 120 of the rotary operating range of the knob 36 shown (reference) Figure 6 (This will be explained.) Figure 6 This is a schematic diagram of the structure of the rotation stop 120 when viewed from the base end side of the handle 22 when examining the knob 36. Additionally, in Figure 3 The diagram also shows a rotary stop 120.

[0082] like Figure 6 As shown, the rotary stop 120 has a stop groove 122 and a stop pin 124. The stop groove 122 is formed on the outer peripheral surface of the front end side of the grip portion 22. The stop groove 122 has a groove portion 122a, a wall portion 122b formed on one end side of the groove portion 122a, and a wall portion 122c formed on the other end side of the groove portion 122a. The groove portion 122a is formed in an arc shape on a plane perpendicular to the insertion axis Ax, centered on the rotation center axis D of the knob 36 relative to the grip portion 22. Furthermore, the wall portions 122b and 122c are respectively formed as stop surfaces that protrude in the normal direction relative to the groove portion 122a. On the other hand, the stop pin 124 is provided on the inner peripheral surface of the knob 36, protruding toward the aforementioned rotation center axis D, and is inserted into the groove portion 122a.

[0083] according to Figure 6 The rotary stop 120 shown is... Figure 6The position of the stop pin 124, indicated by the solid line, represents the central position of the rotational operating range θ (e.g., 340 degrees) of the knob 36. If the knob 36 is rotated counterclockwise F from this central position, the stop pin 124 moves in the same direction along the groove 122a. When the stop pin 124 abuts against the wall 122b, the rotation of the knob 36 in the same direction is restricted. At this time, the position of the knob 36 corresponds to a first rotational position relative to the handle 22 in the axial direction B. Furthermore, if the knob 36 is rotated clockwise G from the aforementioned central position, the stop pin 124 moves in the same direction along the groove 122a. When the stop pin 124 abuts against the wall 122c, the rotation of the knob 36 in the same direction is restricted. At this time, the position of the knob 36 corresponds to a second rotational position relative to the handle 22 in the axial direction B.

[0084] In this example, the operating unit 21 restricts the rotation range θ of the knob 36 to 340 degrees by rotating the stop 120. As a result, the knob 36 is configured to rotate 170 degrees counterclockwise F and clockwise G from the central position between the first and second rotation positions. The aforementioned central position is the reference position of this invention, that is, an example of a reference position that serves as a reference for the position of the knob 36 relative to the grip 22 in the axial direction B. However, the reference position is not limited to the aforementioned central position. For example, a position offset from the central position in the counterclockwise direction F or clockwise direction G can also be set as the reference position. However, by setting the central position as the reference position, the surgeon can adjust the field of vision direction starting from the central position, and although details will be described later, the imaging direction of the strabismus 10 can be set to a downward direction.

[0085] Next, refer to Figures 7 to 10 The preferred configuration considering the operability of the grip 22 and the knob 36 will be explained. Furthermore, in Figures 7 to 10 The diagram uses a three-dimensional orthogonal coordinate system with three directions (X, Y, and Z) for illustration.

[0086] For example, such as Figure 7 As shown, when the orientation of the squinting mirror 10 is defined with the insertion axis Ax in a horizontal direction and the external cable 72 extending from the base end 208 of the holding part 22 in a right-downward direction C, the direction parallel to the insertion axis Ax is defined as the X direction, the front end side in the X direction is defined as the X(+) direction, and the base end side is defined as the X(-) direction. Furthermore, in Figure 7 In the orientation, the direction orthogonal to the insertion axis Ax is... Figure 7The direction orthogonal to the paper is defined as the Y direction, the inside of the paper in the Y direction is defined as the Y(+) direction, and the front of the paper is defined as the Y(-) direction. Furthermore, the direction orthogonal to the X and Y directions is defined as the Z direction, the upper side of the Z direction is defined as the Z(+) direction, and the lower side is defined as the Z(-) direction.

[0087] Here, Figure 7 This is a side view of the operation unit 21 when viewed from the Y(-) direction towards the Y(+) direction. Figure 8 This is a top view of the operating section 21 when viewed from the Z(+) direction to the Z(-) direction. Figure 9 This is a perspective view of the operating unit 21 when viewed from the Z(+) direction. Figure 10 This is a perspective view of the operating unit 21 as seen from the Z(-) direction side. Additionally, Figures 7 to 10 The operation section 21 shown indicates the state in which the knob 36 is in the central position (reference position) relative to the handle section 22.

[0088] First, the gripping part 22 will be explained. For example... Figures 7 to 10 As shown, the outer surface of the gripping portion 22 has a first planar portion 200 (see reference). Figure 8 ), second planar part 202 (reference) Figure 10 ), First section, face 204 (reference) Figure 8 ), Second section, face 206 (reference) Figure 10 ).

[0089] like Figure 7 and Figure 8 As shown, the first planar portion 200 is formed on a portion of the outer surface of the gripping portion 22 and is located on the Z(+) direction side of the outer surface of the gripping portion 22. Specifically, the first planar portion 200 is configured as a surface parallel to the insertion axis Ax, extending along the axial direction of the insertion axis Ax from the front end portion 207 to the base end portion 208 of the gripping portion 22. The first planar portion 200 is an example of the first planar portion of the present invention. Furthermore, when the surgeon holds the gripping portion 22, this first planar portion 200 functions as a surface that contacts the base of the surgeon's thumb.

[0090] Furthermore, the direction perpendicular to the axis is indicated by the camera unit 60 (reference). Figure 3 When the vertical direction of the display image formed by the output camera signal is set to vertical, the first flat portion 200 is formed on the upper side of the outer surface of the grip portion 22, which represents the vertical direction, and is formed as a surface perpendicular to the vertical direction. Therefore, the surgeon can grasp that the plane of the first flat portion 200 corresponds to the top surface of the display image displayed on the display 16.

[0091] like Figure 7 and Figure 10 As shown, the second planar portion 202 is formed on a portion of the outer surface of the gripping portion 22, specifically on the Z(-) direction side of the outer surface of the gripping portion 22. Furthermore, the second planar portion 202 is formed parallel to the first planar portion 200 at a position opposite to it, across the insertion axis Ax. The second planar portion 202 is formed along the axial direction of the insertion axis Ax, extending from the front end portion 207 of the gripping portion 22 to a position further forward (X(+) side) than the base end portion 208.

[0092] Please provide a detailed explanation, such as Figure 7 As shown, the base end portion 208 of the gripping portion 22 has a dome-shaped bulge 208A protruding along the Z(-) direction. The base end side (X(-) side) of the aforementioned second planar portion 202 is formed to connect to the inclined plane 210 formed on the front end side (X(+) side) of the bulge 208A. The second planar portion 202 is an example of the second planar portion of the present invention. Furthermore, when the surgeon holds the gripping portion 22, this second planar portion 202 functions as the contact surface for the four fingers of the surgeon other than the thumb (especially the middle and ring fingers).

[0093] like Figure 8 As shown, the first curved surface 204 is the side edge 200A on the Y(+) direction side of the first planar portion 200 and the second planar portion 202 (see reference). Figure 10 The side edge 202A on the Y(+) direction side (reference) Figure 10 The curved surface of the first curved surface 204 is configured to bulge laterally along the Y(+) direction. In addition, when the surgeon holds the grip 22 with his right hand, for example, this first curved surface 204 functions as the surface that contacts the surgeon's palm, especially the palm (the central concave part of the palm).

[0094] like Figure 8 As shown, the second curved surface 206 is the side edge 200B on the Y(-) direction side of the first planar portion 200 and the second planar portion 202 (see reference). Figure 10 The side edge 202B on the Y(-) direction side (reference) Figure 10 The curved surface of the second curved surface 206 is configured to bulge laterally along the Y(-) direction. In addition, when the surgeon holds the gripping part 22 with his right hand, for example, this second curved surface 206 functions as the surface in contact with the fingertips of the surgeon's four fingers other than the thumb (especially the middle and ring fingers).

[0095] The gripping part 22, configured in this way, is easy for the surgeon to hold due to the first flat surface 200, and is further easy to hold due to the second flat surface 202. Furthermore, it is even easier to hold due to the first curved surface 204 and the second curved surface 206.

[0096] Next, the knob 36 will be explained. For example... Figure 8 and Figure 9 As shown, the knob 36 has a thumb rest 220 for supporting the surgeon's thumb and a pair of finger abutment portions 222, 224 located on both sides of the thumb rest 220 in the axial direction B.

[0097] As an example, the finger support portion 220 is recessed in a direction perpendicular to the insertion axis Ax on a portion of the outer surface of the knob 36. Furthermore, the finger support portion 220 is formed as a concave curved surface along the convex curved surface of the pad portion to support the pad portion of the thumb. The finger support portion 220 is an example of the finger support portion of the present invention.

[0098] As an example, finger abutment portions 222 and 224 protrude from a portion of the outer surface of the knob 36 in a direction perpendicular to the insertion axis Ax. The sides of the thumb, resting on the finger rest portion 220, contact the finger abutment portions 222 and 224. The finger abutment portions 222 and 224 are an example of the finger abutment portions of the present invention.

[0099] The knob 36, constructed in this way, has a finger support 220 and a pair of finger contact parts 222 and 224, making it easy for the surgeon to rotate and operate.

[0100] Then, regarding the operation section 21 in this example, as follows: Figures 7 to 10 As shown, with the knob 36 positioned at its center, which serves as a reference point for the position relative to the grip 22 in the axial direction B, the finger support 220 is positioned directly opposite the first flat portion 200 along the insertion shaft Ax. Specifically, the finger support 220 is positioned along the extension of the first flat portion 200 along the insertion shaft Ax. According to this structure, when the surgeon grips the grip 22, the base of the thumb contacts the first flat portion 200 of the grip 22, allowing the finger support 220 to be placed on the knob 36 in a natural, unbent state. Then, since the two sides of the thumb contact a pair of finger abutments 222, 224, the thumb can be positioned in the left-right direction (…). Figure 8 The operating force during movement in both the Y(-) and Y(+) directions is effectively transmitted to the knob 36. This makes rotating the knob 36 easier, resulting in improved operability for changing the direction of view.

[0101] And, as Figure 8 and Figure 9 As shown, the first flat portion 200 has a first mark 226, and the finger support portion 220 has a second mark 228. When the knob 36 is in the aforementioned central position, the first mark 226 and the second mark 228 are arranged on the same line H along the axial direction of the insertion axis Ax. Therefore, by rotating the grip portion 22 and the knob 36 relative to each other in the axial direction B, the first mark 226 and the second mark 228 are aligned on the same line H, and the rotational position of the knob 36 can be easily aligned with the central position.

[0102] And, as Figure 9 As shown, the first mark 226 and the second mark 228 are each composed of a protrusion. Specifically, the first mark 226 is composed of a protrusion that protrudes from the first flat portion 200 in the Z(+) direction, and the second mark 228 is composed of a protrusion that protrudes from the finger support portion 220 in the Z(+) direction. Thus, by using protrusions to form the first mark 226 and the second mark 228, the surgeon can easily identify the positions of the first mark 226 and the second mark 228 by sight and touch.

[0103] And, as Figure 8 and Figure 9 As shown, the protrusions of the first identifier 226 and the second identifier 228 are configured as raised strips formed along the same line H. Thus, by configuring the first identifier 226 and the second identifier 228 as raised strips along the same line H, the first identifier 226 and the second identifier 228 are easily aligned with the same line H.

[0104] And, as Figure 7 As shown, with knob 36 in the reference position, i.e., the center position, the optical axis OA (reference) is tilted relative to the insertion axis Ax. Figure 2 This includes a component pointing in the direction indicated by arrow K, which is opposite to the normal direction indicated by arrow J of the first flat surface 200. Therefore, with the knob 36 in the reference position, from... Figure 7 When observing in the Y direction, if the insertion part 20 is inserted into the body in a downward oblique direction, the imaging direction becomes a downward oblique direction relative to that direction. That is, the reference position of the knob 36 is set at a position where the imaging direction becomes a downward oblique direction.

[0105] And, as Figure 10 As shown, knob 36 has a third mark 230. This third mark 230 is formed on... Figure 8 and Figure 9The third mark 230, located at a different position than the second mark 228, functions as an indicator of its position relative to the grip 22 in the axial direction B. For example, the third mark 230 is formed on the outer surface of the knob 36, on the side opposite to the second mark 228, separated by the insertion shaft Ax (a position 180 degrees apart from the second mark 228 in the axial direction). This third mark 230 is an example of the third mark of the present invention.

[0106] By providing such a third mark 230 on the knob 36, the following advantages are available. Specifically, when the knob 36 rotates at a large angle (e.g., 120 degrees) relative to the handle 22 from its central position along the axial direction B, the second mark 228 becomes invisible depending on its rotation position, making it sometimes difficult to determine the current rotation angle. In this case, the third mark 230, which is 180 degrees away from the second mark 228 in the axial direction B, is visible, thus allowing the knob 36's rotation position to be determined based on the third mark 230.

[0107] And, as Figure 10 As shown, the third mark 230 is formed by a recess. Thus, by forming the third mark 230 by a recess, it can be easily distinguished from the second mark 228, which is formed by a convex portion. Furthermore, the recess representing the third mark 230 is formed as a recessed strip along the axial direction of the insertion shaft Ax. Thus, by forming the third mark 230 as a recessed strip along the axial direction of the insertion shaft Ax, it becomes easier to determine the rotation position of the knob 36 when observing the third mark 230.

[0108] Next, the function of the strabismus mirror 10 in the embodiment will be explained.

[0109] In the strabismus mirror 10 of this embodiment, the surgeon holds the holding part 22 and inserts the insertion part 20 into the patient's body. Then, to change the direction of the field of vision, the operating knob 36 is rotated along the axial direction B. The outer tube 30 and outer cylinder 32, which rotate integrally with the knob 36, rotate in the same direction, thereby allowing the field of vision to be oriented in the desired direction. Furthermore, when the surgeon operates the outer tube 30 by rotating the knob 36, it is possible to prevent the inner cylinder 34 (base optical system 50 and camera 60) from rotating along the axial direction B with the outer cylinder 32. That is, since the posture of the inner cylinder 34 in the axial direction B is maintained by the magnetic coupling 102, rotation of the observed image on the display 16 can be prevented even when the direction of the field of vision is changed. As a result, the operability of the strabismus mirror 10 is improved.

[0110] Regarding the strabismus sight 10 of the embodiment, when the surgeon holds the grip 22, the base of the thumb contacts (aggregates) the first flat surface 200 of the grip 22, thereby facilitating gripping of the grip 22. Furthermore, when the right palm faces upward, a second flat surface 202 is formed on the outer surface of the grip 22, thereby preventing the grip 22 from rolling on the right palm. This prevents rotation of the observed image on the display, thus improving the operability of the strabismus sight 10.

[0111] Furthermore, when the knob 36 is in the central position and the finger rest 220 is aligned with the first flat surface 200 along the insertion axis Ax, the base of the surgeon's thumb contacts the plane of the first flat surface 200, allowing the thumb to rest naturally on the finger rest 220 of the knob 36 without bending. Then, when changing the field of vision, the knob 36 is rotated along the axis B using the finger abutments 222 and 224 that contact the sides of the thumb. During this change of field of vision, the surgeon can perform the change using the thumb of the hand holding the finger rest 22. Thus, the surgeon can perform single-handed operations during changes of field of vision. As a result, operations for changing the field of vision become easier.

[0112] As described above, in the endoscope according to the embodiment, the handle 22 has a first flat portion 200 on a portion of its outer surface along the axial direction of the insertion axis Ax, and the knob 36 has a finger support portion 220 and a pair of finger contact portions 222, 224. When the knob 36 is in the central position (reference position), the structure in which the finger support portion 220 and the first flat portion 200 are directly opposite each other along the axial direction of the insertion axis Ax can improve operability for changing the direction of the field of view.

[0113] Furthermore, when the surgeon holds the grip 22, the four fingers other than the thumb (especially the middle and ring fingers) come into contact with the second flat surface 202 of the grip 22. Thus, the grip 22 can be firmly held by the thumb, which contacts the first flat surface 200, and the four fingers other than the thumb, which contact the second flat surface 202, thereby significantly improving the grip of the grip 22.

[0114] Furthermore, since the palm contacts the first curved surface 204 (second curved surface 206) of the grip 22, the sense of stability when gripping the grip 22 is enhanced. As a result, when gripping the grip 22, the grip 22 can be stably held in the palm of the hand (the approximate whole of the part excluding the five fingers).

[0115] The above describes examples of endoscopes related to the present invention. However, some modifications or variations can be made to the present invention without departing from its spirit.

[0116] Symbol Explanation

[0117] 10-Oblique scope, 12-Endoscope system, 14-Processor unit, 16-Display, 18-Light source unit, 20-Insertion part, 21-Operating part, 22-Holding part, 24-Camera unit, 26-First signal cable, 27-Second signal cable, 28-Light guide, 28C-Light emission end, 30-Outer tube, 31-Space, 32-Outer cylinder, 34-Inner cylinder, 36-Knob, 38-Sealing ring, 40-Front-end optical system, 42-Front-end body, 44-Front-end scope tube, 4 5-Cylindrical section, 46-Cover glass, 48a-Objective lens, 48b-Prism, 48c-Lens, 50-Base optical system, 52-Base lens barrel, 54-Bracket, 55-Prism, 56-Lens, 60-Image sensor, 64-Image sensor element, 66-Circuit board, 68-Connector, 70-Optical guide insertion space, 72-External cable, 74-Housing, 80-Sealed space, 82-Airtight connector, 84-Connection, 90-Connecting component, 92-Bearing support component, 94-Bearing 96-Bearing support component, 98-Bearing, 100-Connecting beam, 100a-Ring portion, 100b-Ring portion, 102-Magnetic coupling, 103-First magnet, 104-Second magnet, 120-Rotation stop, 122-Stop groove, 122a-Groove portion, 122b-Wall portion, 122c-Wall portion, 124-Stop pin, 200-First flat portion, 200A-Side edge portion, 200B-Side edge portion, 202-Second flat portion, 202A-Side edge portion, 202B- Side edge, 204-first curved surface, 206-second curved surface, 207-front end, 208-base end, 208A-bulge, 220-finger support, 222-finger contact, 224-finger contact, 226-first mark, 228-second mark, 230-third mark, Ax-insertion axis, OA-optical axis, B-axis direction, C-right diagonal downward direction, D-rotation center axis, F-counterclockwise direction, G-clockwise direction, H-same line, J-arrow, K-arrow.

Claims

1. An endoscope comprising: an insertion portion having an optical system disposed at its front end and rotatable along an insertion axis; and an operating portion connected to the base end side of the insertion portion, wherein the endoscope, The operating unit has: The holding portion extends axially along the insertion shaft; and A rotating operating component is disposed between the holding portion and the insertion portion, and is configured to rotate freely relative to the holding portion, allowing the insertion portion to rotate along the axis. The holding part has a first planar portion along the insertion axis on a portion of its outer surface. The rotating operating component has a finger support portion capable of supporting a finger and a pair of finger abutment portions disposed on both sides of the finger support portion in the axial direction. When the rotating operating member is located at a reference position that serves as a reference for the position relative to the grip portion in the axial direction, the finger support portion is positioned directly opposite the first planar portion in the axial direction. The gripping portion has a second planar portion that is parallel to the first planar portion, located on the outer surface of the gripping portion, separated by the insertion shaft, on the side opposite to the first planar portion. The rotating operating member is configured to operate by placing the pad of the thumb on the finger support, making the base of the thumb contact the first plane, and making the fingers other than the thumb contact the second plane, and rotating the rotating operating member by making the two sides of the thumb placed on the finger support contact the finger abutment.

2. The endoscope according to claim 1, wherein, The first planar portion is formed along the axial direction from the front end of the gripping portion to the base end.

3. The endoscope according to claim 1 or 2, wherein, The first planar portion has a first identifier. The finger support has a second identifier. When the rotating operating component is located at the reference position, the first mark and the second mark are arranged on the same line along the axial direction.

4. The endoscope according to claim 3, wherein, The first and second identifiers are convex portions.

5. The endoscope according to claim 4, wherein, The protrusion is a raised strip formed along the same line.

6. The endoscope according to claim 3, wherein, The rotating operating component has a third mark at a position different from the position of the second mark, indicating its position relative to the axial direction of the gripping part.

7. The endoscope according to claim 6, wherein, The third identifier is a recess.

8. The endoscope according to claim 7, wherein, The recess is a concave strip formed along the axial direction.

9. The endoscope according to claim 1 or 2, wherein, The rotating operating component is configured to rotate between a first rotational position and a second rotational position relative to the gripping portion in the axial direction. The reference position is the central position between the first rotation position and the second rotation position.

10. The endoscope according to claim 1 or 2, wherein, The insertion part has a camera unit that captures light passing through the optical system. When the direction representing the up and down of the image formed by the camera signal output by the camera unit in the direction perpendicular to the axis is set as the up and down direction, the first planar portion is formed at the upper side of the outer surface of the gripping portion in the direction representing the up and down direction and is formed as a surface perpendicular to the up and down direction.

11. The endoscope according to claim 1 or 2, wherein, The insertion part has a camera unit that captures light passing through the optical system. The imaging direction of the camera unit is tilted relative to the insertion axis. When the rotating operating component is in the reference position, the imaging direction of the camera includes a component in the direction opposite to the normal direction of the first planar portion.

12. The endoscope according to claim 1 or 2, wherein, The insertion portion includes: External tubing; An outer cylinder is inserted into the outer tube, and the optical system is provided at the front end, which can rotate integrally with the outer tube along the insertion axis of the insertion part in the direction of the axis. and The inner cylinder is inserted into the outer cylinder, and a camera unit is provided at the front end to capture light passing through the optical system, which can rotate relative to the outer cylinder along the axis direction.

Images