Surgical device mounting mechanism and surgical device

Abstract

Provided in the present disclosure are a surgical device mounting mechanism and a surgical device capable of avoiding undesired disassembly of a surgical device assembly. The surgical device mounting mechanism sequentially comprises, in the direction of the central axis thereof, a base, a sterile mount, and a surgical device assembly. The surgical device mounting mechanism further comprises: a first connecting mechanism, the first connecting mechanism enabling the sterile mount to be detachably connected to the base; two second connecting mechanisms spaced apart in the circumferential direction around the central axis, the second connecting mechanisms enabling the surgical device assembly to be detachably connected to the sterile mount; and a locking mechanism, the locking mechanism enabling the surgical device assembly to be detachably connected to the sterile mount.

Description

Surgical device mounting mechanism and surgical device TECHNICAL FIELD

[0001] The present disclosure relates to a surgical device mounting mechanism and a surgical device. BACKGROUND

[0002] In a surgical robot system, it is important to use a sterilization barrier for preventing infection and ensuring surgical safety. For example, end tools of a robot arm that directly contact with patient tissue must be completely sterile. A sterilization barrier is used to ensure that these tools are not contaminated during use. For another example, a camera and light source used for surgical navigation, such as an endoscope lens, a camera head, an optical fiber, etc., must use a sterilization barrier if they directly contact the inside of a patient or a sterile area.

[0003] In some scenarios, a sterile barrier needs to be provided between a driving mechanism of an endoscope device and an endoscope assembly to ensure that the endoscope assembly is not contaminated. The endoscope assembly may, for example, be detachably connected to the driving mechanism. In existing endoscope devices with detachable endoscope assemblies, undesired detachment can occur due to unexpected force applied to the endoscope assembly, etc., because no locking mechanism is provided. In addition, in an endoscope device having a plurality of detachable structures for an endoscope assembly, a sterile cartridge, and a base, it can occur that another connection mechanism is mistakenly detached when one connection mechanism is detached due to a mistake, etc. SUMMARY

[0004] The present disclosure was completed in view of the above problems, and aims to provide a surgical device mounting mechanism and a surgical device capable of avoiding undesired detachment of a surgical device assembly.

[0005] To achieve the above object, a first aspect of the present disclosure provides a surgical device mounting mechanism including, in order along a central axis direction thereof, a base, a sterile cartridge, and a surgical device assembly, the surgical device mounting mechanism further including: a first connection mechanism that detachably connects the sterile cartridge to the base; two second connection mechanisms that are arranged at intervals in a circumferential direction around the central axis, the second connection mechanisms detachably connecting the surgical device assembly to the sterile cartridge; and a locking mechanism that detachably connects the surgical device assembly to the sterile cartridge.

[0006] The surgical device mounting mechanism according to the present disclosure includes two second connection mechanisms arranged at intervals in a circumferential direction around a center axis and detachably connecting a surgical device assembly to a sterile cassette, and a locking mechanism detachably connecting the surgical device assembly to the sterile cassette. Thus, when detaching the surgical device assembly and the sterile cassette, in addition to the second connection mechanisms, the locking mechanism also needs to be unlocked (two-handed operation is required), and undesired detachment of the surgical device assembly can be prevented.

[0007] Further, in the surgical device mounting mechanism according to the present disclosure, the first connection mechanism can have a first button that detaches the sterile cassette from the base from a mounted state by a pressing operation, and the surgical device assembly can have a cylindrical first peripheral wall portion, and the first button can be covered by the first peripheral wall portion in the mounted state of the base, the sterile cassette, and the surgical device assembly. Thus, after the surgical device assembly is mounted, the detachment button, i.e., the first button, of the sterile cassette can be covered, and erroneous detachment of the sterile cassette can be prevented.

[0008] Further, in the surgical device mounting mechanism according to the present disclosure, the first button can be located within a range surrounded by an outer contour of the sterile cassette when viewed in the direction of the center axis. Thus, when assembling the surgical device mounting mechanism, the operator is less likely to touch the first button, and assembly can be easily and reliably performed.

[0009] Further, in the surgical device mounting mechanism according to the present disclosure, the first connection mechanism can have a first hooking portion provided to one of the base and the sterile cassette, and a first hooked portion provided to the other of the base and the sterile cassette and hooked by the first hooking portion, and the hooking of the first hooking portion and the first hooked portion can be released by pressing the first button. Thus, the sterile cassette and the base are directly aligned, and assembly can be quickly performed.

[0010] Further, in the surgical device mounting mechanism according to the present disclosure, the second connection mechanism can have a second button provided to one of the surgical device assembly and the sterile cassette, and the locking mechanism can have a third button provided to the other of the surgical device assembly and the sterile cassette, and the sterile cassette and the surgical device assembly can be detached from a mounted state by pressing operations of the second button and the third button. Thus, the sterile cassette and the surgical device assembly can be detached by pressing operations, and erroneous operation can be prevented when detaching them, as two hands press the buttons on different components.

[0011] Further, in the surgical device mounting mechanism of the present disclosure, the second button and the third button can be offset in the central axis direction and / or circumferentially. Thereby, the sterile cartridge and the surgical device assembly can be easily detached, and detachment can be performed quickly.

[0012] Further, in the surgical device mounting mechanism of the present disclosure, the second button can be provided to the surgical device assembly, and the third button can be provided to the sterile cartridge. The surgical device assembly can have a cylindrical first peripheral wall portion provided with a notch. In the mounted state of the base, the sterile cartridge, and the surgical device assembly, the first peripheral wall portion can surround the sterile cartridge from the outer peripheral side, and the notch can expose the third button. Thereby, the third button can be exposed without increasing the size of the surgical device mounting mechanism in the central axis direction, and the structure of the surgical device mounting mechanism can be compact.

[0013] Further, in the surgical device mounting mechanism of the present disclosure, the second button can be located within a range surrounded by the outer contour of the surgical device assembly when viewed in the central axis direction. Thereby, the second button can not be easily touched by an operator when the surgical device mounting mechanism is assembled, and the mounting can be easily and reliably performed.

[0014] Further, in the surgical device mounting mechanism of the present disclosure, the second connection mechanism can have a second hooking portion provided to one of the surgical device assembly and the sterile cartridge, a second hooked portion provided to the other of the surgical device assembly and the sterile cartridge and to which the second hooking portion is hooked, and a second button by which the hooking of the second hooking portion to the second hooked portion is released by being pressed. The locking mechanism can have a third hooking portion provided to the other of the surgical device assembly and the sterile cartridge, a third hooked portion provided to one of the surgical device assembly and the sterile cartridge and to which the third hooking portion is hooked, and a third button by which the hooking of the third hooking portion to the third hooked portion is released by being pressed. Thereby, the surgical device assembly and the sterile cartridge can be directly aligned, and assembly can be performed quickly.

[0015] Further, in the surgical device mounting mechanism of the present disclosure, two of the first connection mechanisms can be circumferentially spaced apart by 180 degrees. Thereby, the first connection mechanisms can be easily operated.

[0016] Further, in the surgical device mounting mechanism of the present disclosure, two of the first connection mechanisms can be circumferentially spaced apart by 180 degrees. Thereby, the first connection mechanisms can be easily operated.

[0017] Further, in the surgical device mounting mechanism of the present disclosure, it is also possible that the two second connection mechanisms are arranged 180 degrees apart in the circumferential direction. Thus, the second connection mechanisms can be easily operated.

[0018] For example, the surgical device mounting mechanism is an endoscope mounting mechanism, and the surgical device assembly is an endoscope assembly.

[0019] Further, the second aspect of the present disclosure provides a surgical device including any of the above-described surgical device mounting mechanisms. BRIEF DESCRIPTION OF DRAWINGS

[0020] FIG. 1 is a perspective view of an endoscope device of Embodiment 1 of the present disclosure.

[0021] FIG. 2 is an exploded perspective view of the endoscope device of Embodiment 1 of the present disclosure.

[0022] FIG. 3 is a cross-sectional view of an endoscope mounting mechanism of Embodiment 1 of the present disclosure.

[0023] FIG. 4 is a perspective view of an inner housing of a sterile cassette of the endoscope mounting mechanism of Embodiment 1, viewed from a proximal end side.

[0024] FIG. 5 is a perspective view of a support seat of an endoscope assembly of the endoscope mounting mechanism of Embodiment 1, viewed from a proximal end side.

[0025] FIG. 6 is an enlarged perspective view of a first button of the endoscope mounting mechanism of Embodiment 1.

[0026] FIG. 7 is an enlarged perspective view of a second button of the endoscope mounting mechanism of Embodiment 1.

[0027] FIG. 8 is a cross-sectional perspective view of the vicinity of a second connection mechanism of the endoscope mounting mechanism of Embodiment 1.

[0028] FIG. 9 is a cross-sectional view of the endoscope mounting mechanism of Embodiment 1, viewed from a different angle from FIG. 3.

[0029] FIG. 10 is a cross-sectional perspective view of the vicinity of a locking mechanism of the endoscope mounting mechanism of Embodiment 1.

[0030] FIG. 11 is a perspective view schematically showing an endoscope mounting mechanism of Embodiment 2.

[0031] FIG. 12 is a cross-sectional view of the endoscope mounting mechanism of Embodiment 2.

[0032] FIG. 13 is an exploded perspective view of the endoscope mounting mechanism of Embodiment 2.

[0033] FIG. 14 is a perspective view of an inner housing of a sterile cassette of the endoscope mounting mechanism of Embodiment 2, viewed from a proximal end side.

[0034] Fig. 15 is a perspective view of a proximal side housing of an endoscope assembly of the endoscope mounting mechanism of Embodiment 2, viewed from the proximal side.

[0035] Fig. 16 is an enlarged perspective view of the first button of the endoscope mounting mechanism of Embodiment 2.

[0036] Fig. 17 is a cross-sectional view of the endoscope mounting mechanism of Embodiment 1, viewed from a different angle than Fig. 12.

[0037] (Symbol explanation) 10, 10' base; 20, 20' sterile cassette; 30, 30' endoscope assembly (surgical device assembly); 100 endoscope device (surgical device); 102, 102' endoscope mounting mechanism (surgical device mounting mechanism); 312, 312' first peripheral wall portion; 3121, 3121' notch; C1, C1' first connection mechanism; C11, C11' first hooking portion; C12, C12' first button; C13, C124 first hooked portion; C2, C2' second connection mechanism; C21, C21' second hooking portion; C22, C22' second button; C23, C224 second hooked portion; L, L' central axis; S, S' locking mechanism; S1, S1' third hooking portion; S2, S2' third button; S3, S24 third hooked portion DETAILED DESCRIPTION

[0038] Hereinafter, the technical solutions of the embodiments and modified examples of the present disclosure will be described with reference to the drawings. In addition, the scope of the present disclosure is not limited to the following embodiments and modified examples, and can be arbitrarily changed within the scope of the technical idea of the present disclosure. Furthermore, in the following drawings, the actual configuration is sometimes made different from the scale, the number, and the like in each configuration in order to facilitate understanding of each configuration.

[0039] In the following description, the direction parallel to the central axis L, L' is sometimes referred to as the "central axis direction", the circumferential direction around the central axis L, L' is sometimes referred to as the "circumferential direction", and the radial direction with the central axis L, L' as the center is sometimes referred to as the "radial direction".

[0040] The present disclosure can be applied in the field of surgical equipment, especially surgical robots, for detachable and replaceable devices and components with a sterile barrier. The following embodiments are described by way of example with the application of the present disclosure to an endoscope device, it being understood that the present disclosure can also be applied to other detachable and replaceable devices and components with a sterile barrier, such as surgical instruments.

[0041] <Embodiment 1>

[0042] (Overall structure of the endoscope device)

[0043] FIG. 1 is a perspective view of an endoscope device (corresponding to the "surgical device" of the present disclosure) 100 of Embodiment 1 of the present disclosure, with some structures omitted for simplicity of the figure. FIG. 2 is an exploded perspective view of the endoscope device 100 of Embodiment 1 of the present disclosure.

[0044] The endoscope device 100 of Embodiment 1 of the present disclosure is a bronchoscope. Furthermore, the endoscope device 100 of the present embodiment can be used as a disposable endoscope, or can be used as a reusable endoscope. The endoscope device 100 includes a main body portion 101, and an endoscope mounting mechanism (corresponding to the "surgical device mounting mechanism" of the present disclosure) 102. The endoscope mounting mechanism 102 is provided at the distal end of the endoscope device 100 (the distal end side of the main body portion 101). Here, the "distal end side" in the endoscope device 100 refers to the side that is distal from the driving device during use, and the "proximal end side" refers to the side that is proximal to the driving device during use.

[0045] (Endoscope mounting mechanism)

[0046] The structure of the endoscope mounting mechanism will be further described below in conjunction with the drawings.

[0047] FIG. 3 is a cross-sectional view of the endoscope mounting mechanism 102 of Embodiment 1 of the present disclosure. FIG. 4 is a perspective view of the inner housing 21 of the sterile cassette 20 of the endoscope mounting mechanism 102, viewed from the proximal end side. FIG. 5 is a perspective view of the support seat 30B of the endoscope assembly (corresponding to the "surgical device assembly" of the present disclosure) 30 of the endoscope mounting mechanism 102, viewed from the proximal end side. FIG. 6 is an enlarged perspective view of the first button C12 of the endoscope mounting mechanism 102. FIG. 7 is an enlarged perspective view of the second button C22 of the endoscope mounting mechanism 102. FIG. 8 is a cross-sectional perspective view of the vicinity of the second connection mechanism C2 of the endoscope mounting mechanism 102 of Embodiment 1. FIG. 9 is a cross-sectional view of the endoscope mounting mechanism 102 of Embodiment 1, viewed from a different angle than FIG. 3. FIG. 10 is a cross-sectional perspective view of the vicinity of the locking mechanism S of the endoscope mounting mechanism 102 of Embodiment 1.

[0048] The endoscope mounting mechanism 102 of Embodiment 1 of the present disclosure includes, in order along the central axis L thereof, a base 10, a sterile cassette 20, and an endoscope assembly 30. The base 10, the sterile cassette 20, and the endoscope assembly 30 are arranged in order from the proximal end side to the distal end side in the endoscope device 100. Furthermore, the endoscope mounting mechanism 102 further includes a first connection mechanism C1 that detachably connects the sterile cassette 20 to the base 10, a second connection mechanism C2 that detachably connects the endoscope assembly 30 to the sterile cassette 20, and a locking mechanism S that detachably connects the endoscope assembly 30 to the sterile cassette 20.

[0049] The base 10 is provided on the proximal end side in the endoscope mounting mechanism 102. The base 10 is fixedly connected to the distal end of the main body portion 101. On the distal end side in the direction of the central axis L, the base 10 has a first distal end face 11. Also, the base 10 has a through hole H that penetrates the first distal end face 11 in the direction of the central axis L. The through hole H is for the first hooking portion C11 to enter and exit. A portion of the wall surface around the through hole H constitutes the first hooked portion C13 described below. Further, the base 10 has a first side wall 12 that is cylindrical and extends from the outer periphery of the first distal end face 11 toward the proximal end side in the direction of the central axis L.

[0050] The sterile cassette 20 is located on the distal end side of the base 10. Normally, the base 10 and the main body portion 101 to which it is connected are not replaced; the endoscope assembly 30 can be disposable or sterilized for reuse before each use, and sometimes the endoscope assembly 30 is disassembled during use, and if it is directly mounted on the base 10, it can be contaminated with bacteria. The sterile cassette 20 is connected to a sterile cover (not shown), and the endoscope assembly 30 is mounted on the sterile cassette 20 to prevent bacterial contamination.

[0051] In the present embodiment, the sterile cassette 20 has an inner housing 21 and an outer housing 22. The inner housing 21 includes a ring portion 211 and a proximal side plate portion 213 connected to the proximal side of the ring portion 211 and extending in a direction perpendicular to the central axis L. In the present embodiment, the outer peripheral surface of the ring portion 211 lies on an imaginary conical surface centered on the central axis L. The outer diameter of the outer peripheral surface of the ring portion 211 as viewed in the direction of the central axis L increases toward the proximal side. The ring portion 211 has a first housing portion 2111 that houses the first button C12 described below and a second housing portion 2112 that houses the third button S2 described below. The first housing portion 2111 is open toward the outer peripheral side (in other words, the radially outer side centered on the central axis L), so that the first button C12 can be housed in the first housing portion 2111 from the outer peripheral side. The first housing portion 2111 is configured to allow the first button C12 to move in the radial direction (the radial direction centered on the central axis L). The first housing portion 2111 has an inner surface facing the outer peripheral side (see FIG. 3). The second housing portion 2112 is open toward the outer peripheral side, so that the third button S2 can be housed in the second housing portion 2112 from the outer peripheral side. The second housing portion 2112 is configured to allow the third button S2 to move in the radial direction. The second housing portion 2112 also has an inner surface facing the outer peripheral side. The outer housing 22 substantially covers the inner housing 21 from the outside. On the distal side in the direction of the central axis L, the outer housing 22 has a second distal surface 221. The second distal surface 221 covers the distal side surface of the inner housing 21 on the distal side. Also, the outer housing 22 of the sterile cassette 20 has a conical second side wall 222 extending in the direction of the central axis L from the outer peripheral edge of the second distal surface 221 toward the proximal side. In the present embodiment, the outer diameter of the second side wall 222 as viewed in the direction of the central axis L increases toward the proximal side. The second side wall 222 covers all or part of the outer peripheral surface of the inner housing 21 from the outer peripheral side. The outer housing 22 also has a first notch 223 that exposes the first button C12 and a second notch 224 that exposes the third button S2. The first notch 223 and the second notch 224 each extend through the second side wall 222 in the radial direction.

[0052] The endoscope assembly 30 is located on the distal side of the sterile cassette 20. The endoscope assembly 30 has a support seat 30B and an endoscope body 30A disposed in the support seat 30B. The endoscope body includes an insertion tube, not shown, on the distal end for insertion into a body cavity.

[0053] In the present embodiment, the support seat 30B of the endoscope assembly 30 has a proximal side housing 31 and a distal side housing 32. The proximal side housing 31 includes a second plate portion 311 extending in a direction perpendicular to the central axis L, a first annular wall 312 (corresponding to the "first peripheral wall portion" of the present disclosure) extending from an outer periphery of the second plate portion 311 toward the proximal side in the direction of the central axis L, and a second annular portion 314 connected to the second plate portion 311 on the proximal side. In the present embodiment, the first annular wall 312 is conical. The outer diameter of the first annular wall 312, when viewed in the direction of the central axis L, increases toward the proximal side. In the mounted state of the base 10, the sterile cassette 20, and the endoscope assembly 30, the first button C12 is covered by the first annular wall 312.

[0054] The second annular portion 314 is located radially inward (in other words, radially inward of the central axis L) of the first annular wall 312, when viewed in the direction of the central axis L. A step structure is formed between the first annular wall 312 and the second annular portion 314. The first annular wall 312 is provided with a third notch 3121 (corresponding to the "notch" of the present disclosure). The third notch 3121 penetrates the first annular wall 312 in the radial direction. In the mounted state of the base 10, the sterile cassette 20, and the endoscope assembly 30, the first annular wall 312 surrounds the sterile cassette 20 from the outer periphery side, and the notch exposes the third button S2. In the present embodiment, the third notch 3121 extends to the proximal side end of the first annular wall 312. In other words, the third notch 3121 is open toward the proximal side. When the sterile cassette 20 and the endoscope assembly 30 are mounted, the third button S2 (the following third pressing plate S21) moves into the area circumscribed by the third notch 3121 with respect to the endoscope assembly 30 through the opening of the third notch 3121, which is open toward the proximal side.

[0055] The second annular portion 314 has a third receiving portion 3131 that receives the second button C22 described below. The third receiving portion 3131 is open toward the outer periphery side, so that the second button C22 can be received in the third receiving portion 3131 from the outer periphery side. The third receiving portion 3131 is configured to allow the second button C22 to move in the radial direction. The third receiving portion 3131 has an inner surface facing the outer periphery side (see FIG. 3).

[0056] The distal side housing 32 includes a third annular wall 322 extending from the outer periphery of the second plate portion 311 toward the distal side in the direction of the central axis L. The third annular wall 322 wraps (covers) the second annular portion 314 of the proximal side housing 31 from the outer periphery side.

[0057] In the installed state, the proximal end side end of the third annular wall 322 and the stepped structure between the first annular wall 312 and the second annular portion 314 are opposite in the central axis L direction. The third annular wall 322 further has a fourth notch 3221 that exposes the second button C22. The fourth notch 3221 penetrates the third annular wall 322 in the radial direction.

[0058] The sterile cassette 20 is provided between the base 10 and the endoscope assembly 30. The sterile cassette 20 is detachably connected to the base 10 via the first connection mechanism C1. On the other hand, the sterile cassette 20 is detachably connected to the endoscope assembly via two second connection mechanisms C2 arranged at intervals in the circumferential direction around the central axis L.

[0059] (First connection mechanism)

[0060] The first connection mechanism C1 has a first hooking portion C11, a first button C12, a first hooked portion C13 to which the first hooking portion is hooked, a first elastic biasing member T1 that biases the first button C12 to the outer peripheral side centered on the central axis L, a first position limiting portion that limits movement of the first button C12 to the outer peripheral side, and a second position limiting portion that limits movement of the first button C12 to the inner peripheral side. In the present embodiment, two of the first connection mechanisms C1 are arranged at intervals in the circumferential direction. It is preferable that the two first connection mechanisms C1 (of the first buttons C12) be arranged at intervals of 180 degrees in the circumferential direction, so that the two first connection mechanisms C1 can be easily operated. It is preferable that either of the first hooking portion and the first hooked portion be integrated with the first button, so that the number of components can be reduced and the assembly process can be simplified. In the present embodiment, the first hooked portion C13 is provided to the first button C12.

[0061] The first hooking portion C11 and the first button C12 are provided to one of the base 10 and the sterile cassette 20. In the present embodiment, the first hooking portion C11 and the first button C12 are provided to the sterile cassette 20. The first hooking portion C11 protrudes from the proximal end side surface of the first button C12 to the proximal end side in the central axis L direction. The first hooking portion C11 has a hook portion at the tip end that hooks the first hooked portion C13. In the present embodiment, two of the first hooking portions C11 are arranged at intervals in the circumferential direction around the central axis L. It is preferable that the two first hooking portions C11 be arranged at intervals of 180 degrees in the circumferential direction. More specifically, the two first hooking portions C11 are respectively located at positions that are rotationally symmetrical around the central axis L by 180 degrees.

[0062] In the present embodiment, two first hooking parts C13 are arranged at intervals in the circumferential direction around the center axis L in correspondence with the first hooking part C11. It is preferable that the two first hooking parts C13 are arranged at intervals of 180 degrees in the circumferential direction. More specifically, the two first hooking parts C13 are respectively located at positions symmetrical to each other by 180 degrees of rotation around the center axis L.

[0063] The first hooking part C13 is provided to the other one of the base 10 and the sterile cartridge 20. In the present embodiment, the first hooking part C13 is provided to the base 10. The wall surface of the through hole H on the outer peripheral side in the first distal end face 11 of the base 10 constitutes the first hooking part C13.

[0064] As described above, the first button C12 is accommodated in the first accommodation part 2111. The first button C12 has a first press plate C121, two first sub-plates C122, and two first column parts C123.

[0065] The first press plate C121 is for a press operation from the outer peripheral side. The first press plate C121 of the present embodiment is in a conical surface shape. The first press plate C121 projects further to the radial outside than the annular parts 211 on both sides of the first accommodation part 2111 in the inner housing 21 of the sterile cartridge 20.

[0066] The two first sub-plates C122 extend to both sides in the circumferential direction (the circumferential direction around the center axis L) from the first press plate C121. The two first sub-plates C122 are, for example, located on the inner peripheral side than the outer peripheral surface of the first press plate C121. More specifically, the radial positions of the outer peripheral surfaces of the two first sub-plates C122 can be the same as the radial positions of the outer peripheral surfaces of the annular parts 211 on both sides of the first accommodation part 2111, or can be further inside than the radial positions of the outer peripheral surfaces of the annular parts 211 on both sides of the first accommodation part 2111.

[0067] In the state in which the inner housing 21 and the outer housing 22 of the sterile cartridge 20 are assembled, the first notch 223 of the outer housing 22 of the sterile cartridge 20 exposes the first press plate C121 in the first button C12. The outer housing 22 on both sides in the circumferential direction of the first notch 223 opposes the two first sub-plates C122 from the outer peripheral side, and constitutes a first limiting part that limits the movement of the first button C12 to the outer peripheral side.

[0068] Two first column portions C123 protrude from the back surface (a surface facing the inner peripheral side) of the first presser plate C121 toward the inner peripheral side. Each first column portion C123 is covered with a first elastic urging member T. For example, the first elastic urging member can be a coil spring. However, the present application is not limited to this, and another publicly known elastic urging member can be used as long as it can urge the first button C12 toward the outer peripheral side. In a state where the first button C12 is accommodated in the first accommodating portion 2111, one end of the first elastic urging member T1 covering the first column portion C123 abuts against the back surface of the first presser plate C121, and the other end abuts against the inner surface of the first accommodating portion 2111 facing the outer peripheral side. The inner surface of the first accommodating portion 2111 facing the outer peripheral side constitutes a second stopper portion that limits the movement of the first button C12 toward the inner peripheral side.

[0069] As described above, in a state where the inner housing 21 and the outer housing 22 of the sterile cartridge 20 are assembled, the first notch 223 of the outer housing 22 of the sterile cartridge 20 exposes the first presser plate C121 of the first button C12. It is preferable that the first button C12 be located within a range surrounded by the outer contour of the sterile cartridge 20 when viewed in the direction of the central axis L. For example, in a state where the base 10, the sterile cartridge 20, and the endoscope assembly 30 are mounted, the first presser plate C121 is in contact with the circular outer contour of the sterile cartridge 20 when viewed in the direction of the central axis L. In other words, the outer peripheral surface of the first presser plate C121 coincides with the virtual conical shape constituting the outer contour of the sterile cartridge 20.

[0070] The sterile cartridge 20 and the base 10 can be detached from the mounted state by performing a pressing operation on the first button C12. Specifically, the hooking of the first hooking portion C11 and the first hooked portion C13 can be released by pressing the first button C12 toward the inner peripheral side. When the base 10 and the sterile cartridge 20 are mounted, the base 10 and the sterile cartridge 20 are brought close to each other in the direction of the central axis L, and the first hooking portion C11 is hooked to the first hooked portion C13 through the through hole H. It is preferable that the first hooking portion C11 and the first hooked portion C13 be in an arc shape extending in the circumferential direction when viewed in the direction of the axial axis L (the contact portions of the first hooking portion C11 and the first hooked portion C13 be in an arc shape extending in the circumferential direction when viewed in the direction of the axial axis L), whereby the hooking area can be increased, and the first hooking portion C11 can be more stably hooked to the first hooked portion C13. In this case, the through hole H is formed in an arc shape long hole extending in the circumferential direction.

[0071] When the base 10 and the sterile cartridge 20 are detached, the first button C12 is pressed toward the inner peripheral side while moving toward the inner peripheral side against the urging force of the first elastic urging member T1, and the first hooking portion C11 is caused to exit from the through hole H in such a manner that the sterile cartridge 20 is separated from the base 10 in the direction of the central axis L.

[0072] (Second connecting mechanism)

[0073] The second connecting mechanism C2 has a second hooking portion C21, a second button C22, a second hooked portion C23 to which the second hooking portion is hooked, a second elastic biasing member that biases the second button C22 toward the outer peripheral side with the central axis L as the center, a third limiting portion that limits movement of the second button C22 toward the outer peripheral side, and a fourth limiting portion that limits movement of the second button C22 toward the inner peripheral side. In the present embodiment, two of the second connecting mechanisms C2 are arranged at intervals in the circumferential direction. It is preferable that the two second connecting mechanisms C2 (of the second buttons C22) be arranged at intervals of 180 degrees in the circumferential direction, and in this way, it is possible to facilitate operation of the two second connecting mechanisms C2. It is preferable that either of the second hooking portion and the second hooked portion be integrated with the second button. In the present embodiment, the second hooking portion C21 is provided to the second button C22.

[0074] The second hooking portion C21 and the second button C22 are provided to one of the sterile cassette 20 and the endoscope assembly 30. In the present embodiment, the second hooking portion C21 and the second button C22 are provided to the endoscope assembly 30. The second hooking portion C21 has a hook portion that is hooked to the second hooked portion C23.

[0075] In the present embodiment, two of the second hooking portions C21 are arranged at intervals in the circumferential direction around the central axis L. It is preferable that the two second hooking portions C21 be arranged at intervals of 180 degrees in the circumferential direction. In more detail, the two second hooking portions C21 are respectively located at positions that are rotationally symmetrical by 180 degrees around the central axis L.

[0076] The second hooked portion C23 is provided to the other of the sterile cassette 20 and the endoscope assembly 30. In the present embodiment, the second hooked portion C23 is provided to the sterile cassette 20. The sterile cassette 20 has a first protruding portion 2211 that protrudes in the direction of the central axis L from a position near the outer peripheral side in the second distal end face 221 of the outer housing 22 toward the distal end side. The first protruding portion 2211 has a through hole 2211a that penetrates in the radial direction. The through hole 2211a is for the hook portion of the second hooking portion C21 to pass through in the radial direction to be hooked to the second hooked portion C23. The portion of the first protruding portion 2211 on the endoscope assembly 30 side (distal end side) from the through hole 2211a constitutes the second hooked portion C23.

[0077] As described above, the second button C22 is housed in the third housing portion 3131. The second button C22 has a second press plate C221, two second sub-plates C222, and two second column portions C223 (see FIG. 7).

[0078] The second pressing plate C221 is used for a pressing operation from the outer peripheral side. The second pressing plate C221 is in a circular arc shape when viewed in the direction of the central axis L. The second pressing plate C221 protrudes further to the radial direction outside than the second annular portion 314 of the proximal side housing 31 on both sides of the third housing portion 3131 (see FIG. 8). The second pressing plate C221 protrudes further to the radial direction outside than the circular outer contour of the second annular portion 314 when viewed in the direction of the central axis L.

[0079] Two second sub-plates C222 extend from the second pressing plate C221 to both sides in the circumferential direction. The two second sub-plates C222 are, for example, located on the inner peripheral side than the outer peripheral surface of the second pressing plate C221. More specifically, the radial position of the outer peripheral surface of the two second sub-plates C222 can be the same as the radial position of the outer peripheral surface of the second annular portion 314 on both sides of the third housing portion 3131, or can be on the inner peripheral side than the radial position of the outer peripheral surface of the second annular portion 314 on both sides of the third housing portion 3131.

[0080] In a state in which the proximal side housing 31 and the distal side housing 32 of the endoscope assembly 30 are assembled, the fourth notch 3221 of the third annular wall 322 of the distal side housing 32 exposes the second pressing plate C221 of the second button C22. The third annular wall 322 on both sides in the circumferential direction of the fourth notch 3221 opposes the two second sub-plates C222 from the outer peripheral side, and constitutes a third limit portion that limits movement of the second button C22 to the outer peripheral side.

[0081] Two second column portions C223 protrude from the back surface (the surface facing the inner peripheral side) of the second pressing plate C221 and the second sub-plate C222 to the inner peripheral side across the second pressing plate C221 and the second sub-plate C222. Each second column portion C223 has a second elastic biasing member housing portion C2231 that houses a second elastic biasing member. In a state in which the second button C22 is housed in the third housing portion 3131, one end of the second elastic biasing member housed in the second elastic biasing member housing portion C2231 abuts against the bottom wall of the second elastic biasing member housing portion C2231, and the other end abuts against the inner surface of the third housing portion 3131 facing the outer peripheral side. The inner surface of the third housing portion 3131 facing the outer peripheral side constitutes a fourth limit portion that limits movement of the second button C22 to the inner peripheral side. The second elastic biasing member can be, for example, a coil spring. However, it is not limited thereto, and other publicly known elastic biasing members can be used as long as they can bias the second button C22 to the outer peripheral side.

[0082] The second hooking portion C21 is provided between the two second column portions C223. More specifically, the second hooking portion C21 is provided between the inner peripheral side end surfaces of the two second column portions C223. A passage open to both sides in the central axis L direction is formed between the second pressing plate C221 and the second hooking portion C21, and the second hooked portion C23 enters and exits from this passage. In the present embodiment, the hook portion of the second hooking portion C21 protrudes toward the outer peripheral side. When the second hooked portion C23 is moved to a predetermined position between the second pressing plate C221 and the second hooking portion C21, the hook portion of the second hooking portion C21 hooks the second hooked portion C23 by the action of the second elastic biasing member. It is preferable that the second hooking portion C21 and the second hooked portion C23 be arc-shaped extending in the circumferential direction when viewed in the axial direction of the central axis L, whereby the hooking area can be increased and the second hooking portion C21 can be more stably hooked to the second hooked portion C23.

[0083] In the present embodiment, two second hooked portions C23 are disposed at intervals in the circumferential direction around the central axis L in correspondence with the second hooking portion C21. It is preferable that the two second hooked portions C23 be disposed at intervals of 180 degrees in the circumferential direction. More specifically, the two second hooked portions C23 are respectively located at positions symmetrical around the central axis L by 180 degrees.

[0084] As described above, in the state in which the proximal side housing 31 and the distal side housing 32 of the endoscope assembly 30 are assembled, the fourth notch 3221 of the third annular wall 322 of the distal side housing 32 exposes the second pressing plate C221 of the second button C22. It is preferable that the second button C22 be located within the range surrounded by the outer contour of the endoscope assembly 30 when viewed in the direction of the central axis L. For example, in the state in which the base 10, the sterile tray 20, and the endoscope assembly 30 are mounted, the second pressing plate C221 is in contact with the circular outer contour of the endoscope assembly 30 when viewed in the direction of the central axis L. In other words, the outer peripheral surface of the second pressing plate C221 coincides with the virtual circle constituting the outer contour of the endoscope assembly 30. Alternatively, the second button C22 can protrude further toward the outer peripheral side than the outer contour of the endoscope assembly 30.

[0085] The hooking of the second hooking portion C21 and the second hooked portion C23 can be released by pressing the second button C22 toward the inner peripheral side.

[0086] (Locking mechanism)

[0087] The lock mechanism S has a third hooking portion S1, a third button S2, a third hooked portion S3 (see FIG. 9) to which the third hooking portion S1 is hooked, a third elastic urging member that urges the third button S2 toward the outer peripheral side with the central axis L as the center, a fifth regulation portion that regulates movement of the third button S2 toward the outer peripheral side, and a sixth regulation portion that regulates movement of the third button S2 toward the inner peripheral side. In the present embodiment, one lock mechanism is provided. It is preferable that either one of the third hooking portion and the third hooked portion be integrated with the third button. In the present embodiment, the third hooking portion S1 is provided to the third button S2.

[0088] The third hooking portion S1 and the third button S2 are provided to one of the sterile cassette 20 and the endoscope assembly 30. In the present embodiment, the third hooking portion S1 and the third button S2 are provided to the sterile cassette 20. The third hooking portion S1 has a hook portion that is hooked to the third hooked portion S3.

[0089] The third hooked portion S3 is provided to one of the sterile cassette 20 and the endoscope assembly 30. In the present embodiment, the third hooked portion S3 is provided to the endoscope assembly 30. The endoscope assembly 30 has a second protruding portion 3111 (see FIGS. 5 and 9) that protrudes toward the proximal side in the central axis L direction from a position near the outer peripheral side in the second plate portion 311 of the support base 30B. The second protruding portion 3111 has a through-hole 3111a that penetrates in the radial direction. The through-hole 3111a is for the hook portion of the third hooking portion S1 to pass through in the radial direction to be hooked to the third hooked portion S3. The portion of the second protruding portion 3111 on the sterile cassette 20 side (the proximal side) from the through-hole 2211a constitutes the third hooked portion S3.

[0090] As described above, the third button S2 is housed in the second housing portion 2112. The third button S2 has a third press plate S21, two third sub-plates S22, and two third column portions S23 (see FIG. 4).

[0091] The third press plate S21 is for a press operation from the outer peripheral side. The third press plate S21 of the present embodiment is in a conical surface shape. The third press plate S21 protrudes further to the radial direction outside than the annular portion 211 of the inner housing 21 and the second side wall 222 of the outer housing 22 on both sides of the second housing portion 2112 in the sterile cassette 20 (see FIGS. 2 and 4).

[0092] The two third sub-plates S22 extend out to both sides in the circumferential direction from the third press plate S21. The two third sub-plates S22 are, for example, positioned on the inner peripheral side from the outer peripheral surface of the third press plate S21. To be more specific, the radial position of the outer peripheral surface of the two third sub-plates S22 can be the same as the radial position of the outer peripheral surface of the annular portion 211 on both sides of the second housing portion 2112, or can be on the inner peripheral side from the radial position of the outer peripheral surface of the annular portion 211 on both sides of the second housing portion 2112.

[0093] In a state where the inner housing 21 and the outer housing 22 of the sterile cassette 20 are assembled, the second notch 224 of the outer housing 22 of the sterile cassette 20 exposes the third pressing plate S21 of the third button S2. The outer housing 22 on both circumferential sides of the second notch 224 opposes the two third sub-plates S22 from the outer circumferential side, constituting a fifth limit portion that limits movement of the third button S2 toward the outer circumferential side.

[0094] As with the second button C22, the two third column portions S23 of the third button S2 protrude from the back surfaces (surfaces facing the inner circumferential side) of the third pressing plate S21 and the third sub-plate S22 toward the inner circumferential side across the third pressing plate S21 and the third sub-plate S22. Each third column portion S23 has a third elastic biasing member housing portion that houses a third elastic biasing member. In a state where the third button S2 is housed in the second housing portion 2112, one end of the third elastic biasing member housed in the third elastic biasing member housing portion abuts against the bottom wall of the third elastic biasing member housing portion, and the other end abuts against the inner surface of the second housing portion 2112 facing the outer circumferential side. The inner surface of the second housing portion 2112 facing the outer circumferential side constitutes a sixth limit portion that limits movement of the third button S2 toward the inner circumferential side. For example, the third elastic biasing member can be a coil spring. However, it is not limited thereto, and other publicly known elastic biasing members can also be used as long as they can bias the third button S2 toward the outer circumferential side.

[0095] The third hook portion S1 is disposed between the two third column portions S23. More specifically, the third hook portion S1 is disposed between the inner circumferential side end surfaces of the two third column portions S23. A passage that is open to both sides in the central axis L direction is formed between the third pressing plate S21 and the third hook portion S1, and the third hooked portion S3 enters and exits through this passage. In the present embodiment, the hook portion of the third hook portion S1 protrudes toward the outer circumferential side. When the third hooked portion S3 moves to a predetermined position between the third pressing plate S21 and the third hook portion S1, the hook portion of the third hook portion S1 hooks the third hooked portion S3 under the action of the third elastic biasing member. It is preferable that the third hook portion S1 and the third hooked portion S3 have an arc shape extending in the circumferential direction when viewed in the axial direction along the axis L, whereby the hooking area can be increased, and the third hook portion S1 can be more stably hooked to the third hooked portion S3.

[0096] As described above, when the sterile cassette 20 and the endoscope assembly 30 are attached, the third pressing plate S21 of the third button S2 moves to the area circumscribed by the third notch 3121 with respect to the endoscope assembly 30.

[0097] The sterile cassette 20 and the endoscope assembly 30 can be detached from the mounted state by pressing the second buttons C22 and the third button S2 toward the inner peripheral side. The third hooking portion S1 and the third hooked portion S3 can be disengaged by pressing the third button S2.

[0098] When the endoscope assembly 30 and the sterile cassette 20 are mounted, the endoscope assembly 30 and the sterile cassette 20 are brought close to each other in the central axis L direction, the second hooking portion C21 is hooked to the second hooked portion C23, and the third hooking portion S1 is hooked to the third hooked portion S3. When the endoscope assembly 30 and the sterile cassette 20 are detached, the operator presses the two second buttons C22 (the second buttons C22 on both sides of the endoscope assembly 30) with one hand and presses the third button S2 with the other hand, and detaches the endoscope assembly. At this time, while pressing the second buttons C22 toward the inner peripheral side so that the second buttons C22 move toward the inner peripheral side against the force of the second elastic force members, and pressing the third button S2 toward the inner peripheral side so that the third button S2 moves toward the inner peripheral side against the force of the third elastic force member, the sterile cassette 20 and the endoscope assembly 30 are separated in the central axis L direction. After that, the sterile cassette 20 can be detached by pressing the two first buttons C12 (the first buttons C12 on both sides of the sterile cassette 20) with one hand.

[0099] In the present embodiment, the second buttons C22 and the third button S2 are offset in the central axis L direction. In addition, the second buttons C22 and the third button S2 are offset in the circumferential direction.

[0100] In addition, the base 10, the sterile cassette 20, and the endoscope assembly 30 can each have an instrument channel and a plurality of motor channels. In the present embodiment, the base 10, the sterile cassette 20, and the endoscope assembly 30 each have an instrument channel at the center. In particular, the sterile cassette 20 has a tube extending from the center of the inner housing 21 toward the proximal side for the passage of an instrument, and the tube passes through a hole in the middle of the base 10, so that the instrument passes without being contaminated by bacteria. A plurality of (two in the present embodiment) motor channels are provided around the instrument channel. The motors are connected to the drive wires of the endoscope, so that the movement of the endoscope insertion tube can be controlled. In addition, the instrument channel and the motor channels are not necessarily required, and the arrangement of the channels can be adjusted or at least a part of the channels can be omitted.

[0101] Further, positioning structures can be provided between any two adjacent components of the base 10, the sterile cartridge 20, and the endoscope assembly 30, to make the first connecting mechanism C1, the second connecting mechanism C2, and the locking mechanism S easily connectable or disconnectable at accurate positions. For example, one of the adjacent components has a column portion protruding toward the other, and the other has a hole structure into which the column portion is inserted or engaged as an engagement portion. Further, positioning structures can be provided between the inner housing 21 and the outer housing 22 of the sterile cartridge 20 and between the proximal side housing 31 and the distal side housing 32 of the endoscope assembly 30. For example, as shown in Fig. 9, the endoscope assembly 30 has a column portion 3112 protruding toward the sterile cartridge 20. The column portion 3112 protrudes from the second plate portion 311 of the support base 30B toward the sterile cartridge 20 (the proximal side) in the direction of the central axis L. The sterile cartridge 20 has an engagement hole 2212 into which the column portion 3112 is inserted. The engagement hole 2212 has a hole wall extending toward the proximal side from the second distal end face 221 of the sterile cartridge 20.

[0102] <Embodiment 2>

[0103] As with Embodiment 1, the endoscope mounting mechanism 102' of Embodiment 2 includes the base 10', the sterile cartridge 20', and the endoscope assembly 30', and further includes the first connecting mechanism C1', the second connecting mechanism C2', and the locking mechanism S'. Embodiment 2 differs from Embodiment 1 mainly in the specific structures of the first connecting mechanism C1', the second connecting mechanism C2', and the locking mechanism S'.

[0104] As shown in Fig. 13, the base 10' has a first distal end face 11' and a cylindrical first side wall 12' extending from the outer periphery of the first distal end face 11' toward the proximal side in the direction of the central axis L'.

[0105] The sterile cartridge 20' has an inner housing 21' and an outer housing 22'. The inner housing 21' includes a ring-shaped portion 211' and a first plate portion 212 connected to the inner periphery side of the ring-shaped portion 211' and extending in a direction perpendicular to the central axis L'. The ring-shaped portion 211' has a first accommodation portion 2111' that accommodates the first button C12' described below and a second accommodation portion 2112' that accommodates the third button S2' described below. The outer housing 22' has a second distal end face 221' and a cylindrical second side wall 222' extending from the outer periphery of the second distal end face 221' toward the proximal side in the direction of the central axis L'. The outer housing 22' further has a first notch 223' that exposes the first button C12' and a second notch 224' that exposes the third button S2'.

[0106] The endoscope assembly 30' has a support seat 30B' and an endoscope main body (not shown) disposed in the support seat 30B'. The support seat 30B' has a proximal side housing 31' and a distal side housing 32'. The proximal side housing 31' includes a second plate portion 311' extending in a direction perpendicular to the central axis L', a first annular wall portion 312' (corresponding to the "first peripheral wall portion" of the present disclosure) extending from an outer peripheral edge of the second plate portion 311' toward the proximal side in the central axis L' direction, and a second annular wall portion 313 extending from a position on the second plate portion 311' inward from the outer peripheral edge toward the distal side in the central axis L' direction (see FIG. 15). In the mounted state of the base 10', the sterile tray 20', and the endoscope assembly 30', the first button C12' is covered by the first annular wall portion 312'. In addition, the first annular wall portion 312' is provided with a third notch 3121' (corresponding to the "notch" of the present disclosure). The second annular wall portion 313 has a third receiving portion 3131' that receives the second button C22' described below. The third receiving portion 3131' is formed recessed toward the inner peripheral side from the second annular wall portion 313.

[0107] The distal side housing 32' includes a third plate portion 321 extending in a direction perpendicular to the central axis L', a third annular wall portion 322' extending from an outer peripheral edge of the third plate portion 321 toward the proximal side in the central axis L' direction, and a fourth annular wall portion 323 extending from the outer peripheral edge of the third plate portion 321 toward the distal side in the central axis L' direction. The third annular wall portion 322' wraps around the second annular wall portion 313 of the proximal side housing 31' from the outer peripheral side.

[0108] The first connection mechanism C1' has a first hooking portion C11', a first button C12', a first hooked portion C124 provided to the first button C12' for the first hooking portion to hook, a first elastic biasing member that biases the first button C12' toward the outer peripheral side centered on the central axis L', a first limiting portion that limits movement of the first button C12' toward the outer peripheral side, and a second limiting portion that limits movement of the first button C12' toward the inner peripheral side.

[0109] The first hooking portion C11' is provided to the base 10'. The first hooking portion C11' protrudes from a position near the outer peripheral side in the first distal face 11' of the base 10' toward the distal side in the central axis L' direction. The first hooking portion C11' hooks the first hooked portion C124 at the tip end.

[0110] The first button C12' and the first hooked portion C124 are provided to the sterile cartridge 20'. The first button C12' has a first pressing plate C121', two first sub-plates C122', and two first column portions C123' (see FIG. 16). The housing 22' on both sides of the first notch 223' in the circumferential direction opposes the two first sub-plates C122' from the outer circumferential side, constituting a first stop portion.

[0111] As shown in FIG. 16, the two first column portions C123' protrude toward the inner circumferential side across the back surface of the first pressing plate C121' and the first sub-plate C122'. Each first column portion C123' has a first elastic biasing member housing portion C1231 that houses a first elastic biasing member. In a state in which the first button C12' is housed in the first housing portion 2111', one end of the first elastic biasing member housed in the first elastic biasing member housing portion C1231 abuts against the bottom wall of the first elastic biasing member housing portion C1231, and the other end abuts against the inner surface of the first housing portion 2111' that faces the outer circumferential side. The inner surface of the first housing portion 2111' that faces the outer circumferential side constitutes a second stop portion. The first elastic biasing member can be, for example, a coil spring. The first hooked portion C124 is provided between the two first column portions C123'. A first passage C125 is formed between the first pressing plate C121' and the first hooked portion C124. The first passage C125 is open to both sides in the direction of the central axis L', allowing the first hooked portion C11' to enter and exit.

[0112] When the base 10' and the sterile cartridge 20' are attached, the base 10' and the sterile cartridge 20' are brought closer to each other in the direction of the central axis L', and the first hooked portion C11' is hooked to the first hooked portion C124 by passing through the first passage C125. When the base 10' and the sterile cartridge 20' are detached, the first button C12' is pressed toward the inner circumferential side while being moved toward the inner circumferential side against the biasing force of the first elastic biasing member, and the first hooked portion C11' is caused to exit from the first passage C125 in such a manner that the sterile cartridge 20' is moved away from the base 10' in the direction of the central axis L'.

[0113] The second connection mechanism C2' has a second hooked portion C21', a second button C22', a second hooked portion C224 that hooks the second hooked portion C21' and is provided to the second button C22', a second elastic biasing member that biases the second button C22' toward the outer circumferential side centered on the central axis L', a third stop portion that limits movement of the second button C22' toward the outer circumferential side, and a fourth stop portion that limits movement of the second button C22' toward the inner circumferential side.

[0114] The second hooking portion C21' is provided to the sterile cassette 20'. The second hooking portion C21' protrudes from a position near the outer peripheral side in the second distal end face 221' of the sterile cassette 20' toward the distal end side in the direction of the central axis L'. The second hooking portion C21' is hooked at the tip end to the second hooked portion C224.

[0115] The second button C22' and the second hooked portion C224 are provided to the endoscope assembly 30'. Like the first button C12', the second button C22' has a second presser plate C221', two second sub-plates, and two second column portions.

[0116] The third annular wall 322' on both circumferential sides of the fourth notch 3221' opposes the two second sub-plates from the outer peripheral side, constituting a third stop portion.

[0117] Although not shown, each second column portion has a second elastic biasing member accommodating portion that accommodates a second elastic biasing member. In a state in which the second button C22' is accommodated in the third accommodating portion 3131', one end of the second elastic biasing member accommodated in the second elastic biasing member accommodating portion abuts against a bottom wall of the second elastic biasing member accommodating portion, and the other end abuts against an inner surface of the third accommodating portion 3131' that faces the outer peripheral side. The inner surface of the third accommodating portion 3131' that faces the outer peripheral side constitutes a fourth stop portion. The second hooked portion C224 is, for example, erected between the two second column portions. A second passage is formed between the second presser plate C221' and the second hooked portion C224, the second passage being open to both sides in the direction of the central axis L' for entry and exit of the second hooking portion C21'.

[0118] The locking mechanism S' has a third hooking portion S1', a third button S2', a third hooked portion S24 to which the third hooking portion S1' is hooked, provided to the third button S2', a third elastic biasing member that biases the third button S2' toward the outer peripheral side centered on the central axis L', a fifth stop portion that limits movement of the third button S2' toward the outer peripheral side, and a sixth stop portion that limits movement of the third button S2' toward the inner peripheral side.

[0119] The third hooking portion S1' is provided to the endoscope assembly 30'. The third hooking portion S1' protrudes from a position near the outer peripheral side in the second plate portion 311' of the proximal end side housing 31' of the endoscope assembly 30' toward the proximal end side in the direction of the central axis L'. The third hooking portion S1' is hooked at the tip end to the third hooked portion S24.

[0120] The third button S2' and the third hooked portion S24 are provided to the sterile cassette 20'. Like the first button C12', the third button S2' has a third presser plate S21', two third sub-plates S22', and two third column portions. The housing 22' on both sides of the second notch 224' in the circumferential direction opposes the two third sub-plates S22' from the outer circumferential side, constituting a fifth stop portion.

[0121] Although not shown, each third column portion has a third elastic biasing member accommodating portion that accommodates a third elastic biasing member. In a state where the third button S2' is accommodated in the second accommodating portion 2112', one end of the third elastic biasing member accommodated in the third elastic biasing member accommodating portion abuts against the bottom wall of the third elastic biasing member accommodating portion, and the other end abuts against the inner surface of the second accommodating portion 2112' facing the outer circumferential side. The inner surface of the second accommodating portion 2112' facing the outer circumferential side constitutes a sixth stop portion. The third hooked portion S24 is provided between the two third column portions. A third passage is formed between the third presser plate S21' and the third hooked portion S24, which is open to both sides in the central axis L' direction, for the third hooked portion S1' to enter and exit.

[0122] When the endoscope assembly 30' and the sterile cassette 20' are attached, the endoscope assembly 30' and the sterile cassette 20' are brought closer to each other in the central axis L' direction, the second hooked portion C21' is hooked to the second hooked portion C224, and the third hooked portion S1' is hooked to the third hooked portion S24. When the endoscope assembly 30' and the sterile cassette 20' are detached, the operator presses the two second buttons C22' with one hand and the third button S2' with the other hand, and detaches the endoscope assembly. At this time, while pressing the second buttons C22' toward the inner circumferential side so that the second buttons C22' move toward the inner circumferential side against the force of the second elastic biasing members, and pressing the third button S2' toward the inner circumferential side so that the third button S2' moves toward the inner circumferential side against the force of the third elastic biasing member, the sterile cassette 20' and the endoscope assembly 30' are separated in the central axis L' direction. After that, the two first buttons C12' can be pressed with one hand, and the sterile cassette 20' can be detached.

[0123] <Other modifications>

[0124] The above description of the present disclosure is exemplary in conjunction with the drawings, and it is obvious that the specific implementation of the present disclosure is not limited to the above-described embodiments.

[0125] In the above-described embodiments, an example in which the first connecting mechanism includes the first hooking portion, the first hooked portion, the first button, the first elastic biasing member, the first stop portion, and the second stop portion has been described. However, the present disclosure is not limited thereto, and other publicly known structures that detachably connect the sterile cassette and the base can be used. For example, a publicly known structure that includes a first button that detaches the sterile cassette and the base from the attached state by a press operation can be used. The same applies to the second connecting mechanism and the locking mechanism.

[0126] Further, in the above-described embodiments, an example in which the endoscope mounting mechanism is applied to a bronchoscope has been described. However, the present disclosure is not limited thereto, and can be applied to other endoscope devices such as a gastroscope and a colonoscope, or other surgical devices other than endoscope devices.

[0127] The above-described specific embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. However, it is to be understood that the above description is not intended to limit the present disclosure in any way, and the technical features in each of the embodiments can be combined in any manner to constitute a new embodiment. For example, a certain technical feature among all the technical features described in an embodiment can be added to a technical feature of another embodiment, or a certain technical feature among all the technical features described in an embodiment can be deleted from the embodiment. Further, a person skilled in the art, after understanding the above-described specific embodiments, can make various other modifications and changes to the present disclosure as needed. None of these deviates from the spirit of the present disclosure.

Claims

1. A surgical device mounting mechanism characterized by comprising: The surgical device mounting mechanism includes, in order along a central axis (L, L') direction thereof, a base (10, 10'), a sterile cassette (20, 20'), and a surgical device assembly (30, 30'), The surgical device mounting mechanism further includes: a first connecting mechanism (C1, C1') that detachably connects the sterile cassette to the base; two second connecting mechanisms (C2, C2') that are arranged at intervals in a circumferential direction around the central axis and that detachably connect the surgical device assembly to the sterile cassette; and a locking mechanism (S, S') that detachably connects the surgical device assembly to the sterile cassette.

2. The surgical device mounting mechanism according to claim 1, wherein the first connecting mechanism has a first button (C12, C12') that detaches the sterile cassette from the base from a mounted state by a pressing operation, the surgical device assembly has a cylindrical first peripheral wall portion (312, 312'), the first button is covered by the first peripheral wall portion in a mounted state of the base, the sterile cassette, and the surgical device assembly.

3. The surgical device mounting mechanism according to claim 2, wherein the first button is located within a range surrounded by an outer contour of the sterile cassette when viewed in the central axis direction.

4. The surgical device mounting mechanism according to claim 2, wherein the first connecting mechanism has: a first hooking portion (C11, C11') provided to one of the base and the sterile cassette; and a first hooked portion (C13, C124) provided to the other of the base and the sterile cassette and to which the first hooking portion is hooked, the hooking of the first hooking portion to the first hooked portion is released by pressing the first button.

5. The surgical device mounting mechanism according to claim 1, wherein the second connecting mechanism has a second button (C22, C22') provided to one of the surgical device assembly and the sterile cassette, the locking mechanism has a third button (S2, S2') provided to the other of the surgical device assembly and the sterile cassette, the sterile cassette is detached from the surgical device assembly from a mounted state by a pressing operation on the second button and the third button.

6. The surgical device mounting mechanism according to claim 5, wherein the second button and the third button are offset in the central axis direction and / or are offset in a circumferential direction.

7. The surgical device mounting mechanism according to claim 5, wherein the second button is provided to the surgical device assembly, the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third button is provided to the sterile cassette, the surgical device assembly has a cylindrical first peripheral wall portion that is provided with a notch (3121, 3121'), the third In the mounted state of the base, the sterile cassette, and the surgical device assembly, the first peripheral wall portion surrounds the sterile cassette from the outer peripheral side, and the notch exposes the third button.

8. The surgical device mounting mechanism according to claim 1, wherein the second connecting mechanism has: a second hooking portion (C21, C21') provided to one of the surgical device assembly and the sterile cassette; a second hooked portion (C23, C224) provided to the other of the surgical device assembly and the sterile cassette and to which the second hooking portion is hooked; and a second button by which the hooking of the second hooking portion to the second hooked portion is released by pressing the second button. the locking mechanism has: a third hooking portion (S1, S1') provided to the other of the surgical device assembly and the sterile cassette; a third hooked portion (S3, S24) provided to one of the surgical device assembly and the sterile cassette and to which the third hooking portion is hooked; and a third button by which the hooking of the third hooking portion to the third hooked portion is released by pressing the third button.

9. The surgical device mounting mechanism according to claim 1, wherein the first connecting mechanism is provided with two in the circumferential direction.

10. The surgical device mounting mechanism according to any one of claims 1 to 9, wherein the surgical device mounting mechanism is an endoscope mounting mechanism, and the surgical device assembly is an endoscope assembly. An endoscope mounting mechanism according to any one of claims 1 to 10.

11. A surgical device, characterized by ​

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