Endoscope sheath

Abstract

The utility model provides an endoscope sheath. The endoscope sheath comprises an outer sheath part and an inner sheath part, a locking groove is formed in the outer sheath component, and at least part of the side wall of the locking groove forms a first locking face. The inner sheath part is detachably connected with the outer sheath part through the locking assembly; wherein the locking assembly comprises a locking pin, and in the locking process of the inner sheath component and the outer sheath component, the locking pin can be driven by the outer sheath component to move from a first position to a second position; when the position of the locking pin corresponds to the locking groove of the outer sheath component, the locking pin moves from the second position to the first position so that the locking pin can be matched with the first locking face, and the axial position of the inner sheath component relative to the outer sheath component is limited through the locking pin. According to the endoscope sheath, the traditional locking plate type design is abandoned, the button type locking assembly is adopted, the locking structure is compact, and the endoscope sheath does not invade into the space outside the structure during unlocking; in addition, moving parts are small in occupied space, convenient to disassemble and capable of being automatically locked, and the energy of an operation operator is saved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an endoscope sheath, and belongs to the technical field of medical devices. BACKGROUND

[0002] The sheath of the prior art medical endoscope generally comprises an inner sheath and an outer sheath, and the inner sheath and the outer sheath are connected and locked when in use.

[0003] The locking mechanism of the mainstream inner sheath and outer sheath on the market at present is to provide a ring sleeve type locking plate on the inner sheath interface, the locking plate is symmetrically provided with two pins, the pins can slide in the two guide grooves symmetrically provided on the outer sheath interface, and the locking plate is driven at the same time; after being inserted in place, the locking plate is driven to reset by the elastic element, so as to realize the locking of the inner sheath and the outer sheath. When the inner sheath and the outer sheath need to be separated, the inner sheath can be removed by pressing the button on the locking plate.

[0004] The locking mechanism of the inner sheath and the outer sheath in the prior art uses a whole sliding locking plate, which is large in size and easy to interfere with the surrounding environment objects (such as other instruments or hands holding the nearby instruments), and is poor in operation convenience. CONTENT OF THE UTILITY MODEL

[0005] The present disclosure provides an endoscope sheath.

[0006] According to one aspect of the present disclosure, an endoscope sheath is provided, which comprises:

[0007] an outer sheath component, which is formed with a locking groove, at least part of the side wall of the locking groove being formed into a first locking surface; and

[0008] an inner sheath component, which is detachably connected with the outer sheath component through a locking assembly; wherein the locking assembly comprises a locking pin, which can be driven by the outer sheath component to move from a first position to a second position in the process of locking the inner sheath component and the outer sheath component; when the position of the locking pin corresponds to the locking groove of the outer sheath component, the locking pin moves from the second position to the first position, so that the locking pin cooperates with the first locking surface, and the axial position of the inner sheath component relative to the outer sheath component is limited by the locking pin.

[0009] According to the endoscope sheath of at least one embodiment of the present disclosure, the locking assembly is provided as two.

[0010] According to the endoscope sheath of at least one embodiment of the present disclosure, the two locking assemblies are uniformly distributed along the circumference of the inner sheath component.

[0011] According to the endoscope sheath of at least one embodiment of the present disclosure, further comprising:

[0012] An inner sheath base fixed to the inner sheath member; wherein a mounting hole is formed on the inner sheath base along a radial direction of the inner sheath base; the mounting hole is used for guiding movement of the locking pin between the first position and the second position.

[0013] According to the endoscope sheath of at least one embodiment of the present disclosure, one end of the outer sheath member is provided with a groove extending from the one end of the outer sheath member along the central axis direction of the outer sheath member; a first stop portion and a second stop portion are formed at the opening of the groove, and the first stop portion and the second stop portion are used for defining the locking groove.

[0014] According to the endoscope sheath of at least one embodiment of the present disclosure, the first stop portion and the second stop portion have a spacing distance in the circumferential direction.

[0015] According to the endoscope sheath of at least one embodiment of the present disclosure, a surface of the first stop portion close to the bottom wall of the groove is formed as a first locking surface, and a surface of the second stop portion close to the bottom wall of the groove is formed as a first locking surface.

[0016] According to the endoscope sheath of at least one embodiment of the present disclosure, a surface of the first stop portion close to the central axis of the outer sheath member is formed as a first guide surface, and the first guide surface is formed as an inclined surface gradually close to the central axis of the outer sheath member in the direction of the insertion of the inner sheath member into the outer sheath member.

[0017] According to the endoscope sheath of at least one embodiment of the present disclosure, the locking pin comprises:

[0018] A guide portion for being guided by the mounting hole of the inner sheath base;

[0019] A locking portion connecting the guide portion through a connecting portion, wherein the size of the connecting portion is smaller than the spacing distance in the circumferential direction; the guide portion comprises a second locking surface for cooperating with the first locking surface to lock the inner sheath member and the outer sheath member.

[0020] According to the endoscope sheath of at least one embodiment of the present disclosure, the size of the locking portion is greater than the spacing distance in the circumferential direction.

[0021] According to the endoscope sheath of at least one embodiment of the present disclosure, the size of the locking portion is greater than the size of the connecting portion in the circumferential direction; at least part of the surface of the connecting portion is formed as a guide surface for cooperating with the first guide surface.

[0022] According to the endoscope sheath of at least one embodiment of the present disclosure, the guide surface is arranged parallel to the first guide surface.

[0023] The endoscope sheath according to at least one embodiment of the present disclosure, the first locking surface is obliquely disposed, wherein, along the direction of the inner sheath member being inserted into the outer sheath member, the first locking surface is formed as an inclined surface gradually away from the central axis of the outer sheath member.

[0024] The endoscope sheath according to at least one embodiment of the present disclosure, the first locking surface is disposed in parallel with the second locking surface.

[0025] The endoscope sheath according to at least one embodiment of the present disclosure, a limiting member is disposed on the inner sheath seat, the limiting member is used to limit the locking pin in the first position.

[0026] The endoscope sheath according to at least one embodiment of the present disclosure, the lower end of the guide portion of the locking pin is formed with an outer flange, the outer flange cooperates with the limiting member, so that the locking pin is limited in position by the limiting member.

[0027] The endoscope sheath according to at least one embodiment of the present disclosure, the upper end of the guide portion of the locking pin is installed with a button, the guide portion of the locking pin is sleeved with a spring, one end of the spring is abutted on the limiting member, the other end of the spring is abutted on the button. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

[0029] Figure 1 is a structural schematic view of an endoscope sheath according to one embodiment of the present disclosure (combined state).

[0030] Figure 2 is a structural schematic view of an endoscope sheath according to one embodiment of the present disclosure (separated state).

[0031] Figure 3 is a structural schematic view of an outer sheath member of an endoscope sheath according to one embodiment of the present disclosure.

[0032] Figure 4 is a sectional structural schematic view of an outer sheath member of an endoscope sheath according to one embodiment of the present disclosure.

[0033] Figure 5 is a structural schematic view of an inner sheath member and a locking assembly of an endoscope sheath according to one embodiment of the present disclosure.

[0034] Figure 6is a sectional structure schematic view of an inner sheath component and a locking assembly of an endoscope sheath according to one embodiment of the present disclosure.

[0035] Figure 7 is a structure schematic view of a locking pin of an endoscope sheath according to one embodiment of the present disclosure.

[0036] Figure 8 is a structure schematic view of an inner sheath seat of an endoscope sheath according to one embodiment of the present disclosure.

[0037] Figure 9 is an assembly process schematic view of an endoscope sheath according to one embodiment of the present disclosure.

[0038] Figure 10 is a sectional structure schematic view of an endoscope sheath in a combined state according to one embodiment of the present disclosure.

[0039] The reference signs in the drawings are specifically as follows:

[0040] 100 outer sheath component

[0041] 110 locking groove

[0042] 111 first locking surface

[0043] 120 positioning groove

[0044] 130 first stop portion

[0045] 131 first guide surface

[0046] 140 second stop portion

[0047] 141 second guide surface

[0048] 200 inner sheath component

[0049] 300 locking assembly

[0050] 310 limiting component

[0051] 320 locking pin

[0052] 321 guide portion

[0053] 322 locking portion

[0054] 323 connecting portion

[0055] 324 outer flange

[0056] 325 second locking surface

[0057] 326 guide surface

[0058] 330 button

[0059] 340 spring

[0060] 400 inner hub

[0061] 410 positioning protrusion DETAILED DESCRIPTION

[0062] The present disclosure will be further described in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely exemplary and are not limiting to the disclosure. In addition, it should also be noted that only parts related to the present disclosure are shown in the drawings for the purpose of description.

[0063] It should be noted that the embodiments and features in the embodiments of the present disclosure can be combined with each other without conflict. The technical solutions of the present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0064] Unless otherwise specified, the exemplary embodiments / instances shown will be understood to provide exemplary features of various details that can implement the technical concepts of the present disclosure in practice. Therefore, unless otherwise specified, the features of various embodiments / instances can be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of the present disclosure.

[0065] In the drawings, cross-hatching and / or shading are generally used to indicate that the boundaries of adjacent components are clear. Thus, the presence or absence of cross-hatching or shading does not convey or imply any preference or requirement as to the specific material, material properties, dimensions, proportions, commonality of the illustrated components, and / or any other characteristic, attribute, property, etc. of the components. In addition, in the drawings, the size and relative sizes of components can be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be practiced differently, a specific process sequence can be performed in a different order than described. For example, two consecutively described processes can be performed substantially simultaneously or in reverse order to that described. Furthermore, like reference numerals denote like components throughout the drawings.

[0066] When a component is referred to as being "on" or "over" another component, "connected to" or "coupled to" another component, it can be directly on, directly connected to, or directly coupled to the other component, or intervening components can be present. However, when a component is referred to as being "directly on", "directly connected to", or "directly coupled to" another component, there are no intervening components present. For this reason, the term "connected" can refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0067] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0068] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0069] Figure 1 This is a schematic diagram of the structure (in the assembled state) of an endoscope sheath according to one embodiment of the present disclosure. Figure 2 This is a schematic diagram of the structure of an endoscope sheath (in the separated state) according to one embodiment of the present disclosure.

[0070] like Figure 1 and Figure 2 As shown, the endoscope sheath of this disclosure may include an outer sheath component 100 and an inner sheath component 200, wherein the inner sheath component 200 is detachably connected to the outer sheath component 100 via a locking assembly 300.

[0071] When in use, the endoscope sheath of this disclosure can be in a position where... Figure 1In the shown combined state, the inner sheath component 200 is locked to the outer sheath component 100 by the locking assembly 300, and accordingly, the inner sheath component 200 and the outer sheath component 100 cannot rotate and move relative to each other. When the endoscope sheath is used, the endoscope sheath can be in Figure 2 In the shown separated state, the inner sheath component 200 can be separated from the outer sheath component 100 by operating the locking assembly 300.

[0072] The outer sheath component 100 and the inner sheath component 200 are both formed in a substantially cylindrical structure, and thus, the outer sheath component 100 and the inner sheath component 200 both include a central axis, and when the endoscope sheath in the present disclosure is in the combined state, the central axis of the outer sheath component 100 and the central axis of the inner sheath component 200 coincide.

[0073] Based on this, the endoscope sheath in the present disclosure can include a circumferential direction (circumferential) and a central axis direction (axial), wherein the circumferential of the endoscope sheath is also the circumferential of the outer sheath component 100 or the circumferential of the inner sheath component 200; similarly, the axial of the endoscope sheath is also the axial of the outer sheath component 100 or the axial of the inner sheath component 200.

[0074] Figure 3 is a structural schematic diagram of an outer sheath component of an endoscope sheath according to an embodiment of the present disclosure.

[0075] As shown in Figure 3 The endoscope sheath in the present disclosure includes an outer sheath component 100 and an inner sheath component 200. As shown, one end of the outer sheath component 100 is formed in a cylindrical structure, and one end of the inner sheath component 200 can be inserted into the cylindrical structure of the outer sheath component 100.

[0076] The cylindrical structure of the outer sheath component 100 is formed with a locking groove 110 and a positioning groove 120; in a specific embodiment, the locking groove 110 can be two, and the positioning groove 120 can also be provided as two. Of course, the locking groove 110 in the present disclosure can also be provided as more than two, and the positioning groove 120 in the present disclosure can be provided as one or more than two, and the present disclosure does not limit the number of the locking groove 110 and the positioning groove 120.

[0077] The locking groove 110 is uniformly distributed along the circumferential. Taking two locking grooves 110 as an example, the two locking grooves 110 can be arranged at an interval of 180° along the circumferential. Similarly, the positioning groove 120 is uniformly distributed along the circumferential. Taking two positioning grooves 120 as an example, the two positioning grooves 120 can be arranged at an interval of 180° along the circumferential.

[0078] Referring again to Figure 3 In a preferred embodiment, along the circumferential direction, the locking groove 110 is arranged at an interval of 90° with the positioning groove 120 adjacent to the locking groove 110.

[0079] At least a portion of the sidewall of the locking groove 110 is formed as a first locking surface 111. Specifically, a groove is provided at one end (i.e., one end of the cylindrical structure) of the outer sheath component 100 of this disclosure, the groove extending from one end of the outer sheath component 100 along the central axis of the outer sheath component 100; a first stop portion 130 and a second stop portion 140 are formed at the opening of the groove, thereby the bottom wall of the groove is formed as the bottom wall of the locking groove 110, a portion of the sidewall of the groove is formed as the sidewall of the locking groove 110, and a portion of the surfaces of the first stop portion 130 and the second stop portion 140 are formed as the top wall of the locking groove 110. In other words, the locking groove 110 of this disclosure is defined by the groove of the outer sheath component 100, the first stop portion 130 and the second stop portion 140.

[0080] like Figure 3 As shown, the first stop portion 130 and the second stop portion 140 of this disclosure are spaced apart in the circumferential direction; thus, the locking groove 110 of this disclosure is formed as a groove structure with an opening.

[0081] In some embodiments, the first stop portion 130 and the second stop portion 140 have the same structure and are arranged symmetrically about a plane passing through the central axis.

[0082] Figure 4 This is a cross-sectional structural schematic diagram of the outer sheath component of an endoscope sheath according to one embodiment of the present disclosure.

[0083] like Figure 3 and Figure 4 As shown, the surface of the first stop portion 130 near the bottom wall of the groove is formed as a first locking surface 111, and the surface of the second stop portion 140 near the bottom wall of the groove is also formed as a first locking surface 111. More preferably, the first locking surface 111 is provided obliquely, wherein, along the direction in which the inner sheath member 200 is inserted into the outer sheath member 100 (i.e., along the direction in which the inner sheath member 200 approaches the outer sheath member 100 when the inner sheath member 200 is inserted into the outer sheath member 100), the first locking surface 111 is formed as an oblique surface that gradually moves away from the central axis of the outer sheath member 100.

[0084] The surface of the first stop portion 130 near the central axis of the outer sheath member 100 is formed as a first guide surface 131. Along the direction in which the inner sheath member 200 is inserted into the outer sheath member 100, the first guide surface 131 is formed as an inclined surface that gradually approaches the central axis of the outer sheath member 100.

[0085] Similarly, the surface of the second stop portion 140 near the central axis of the outer sheath member 100 is formed as a second guide surface 141. Along the direction in which the inner sheath member 200 is inserted into the outer sheath member 100, the second guide surface 141 is formed as an inclined surface that gradually approaches the central axis of the outer sheath member 100.

[0086] Figure 5 is a structural schematic view of an inner sheath component and a locking assembly of an endoscope sheath according to one embodiment of the present disclosure. Figure 6 is a sectional structural schematic view of an inner sheath component and a locking assembly of an endoscope sheath according to one embodiment of the present disclosure.

[0087] As shown in Figure 5 and Figure 6 , the locking assembly 300 of the present disclosure is provided in two, which are evenly distributed along the circumference of the inner sheath component 200, and thus, the locking assembly 300 of the present disclosure is provided one by one with the locking groove 110.

[0088] The endoscope sheath of the present disclosure can greatly reduce the probability of accidental disconnection of the connection between the inner sheath component and the outer sheath component through the provision of two locking assemblies 300, and solves the technical problem in the prior art that only one set of independent locking elements exists, which is easy to be accidentally disconnected due to accidental pressing of the button during use, thereby causing surgical risks. Specifically, the two locking assemblies 300 of the present disclosure need to be pressed at the same time to disconnect the connection between the inner sheath component and the outer sheath component, thereby improving the safety of the endoscope sheath during use.

[0089] The endoscope sheath of the present disclosure further comprises an inner sheath seat 400, which is fixed to the inner sheath component 200; wherein the inner sheath seat 400 is provided with mounting holes in the radial direction. The number of mounting holes on the inner sheath seat 400 of the present disclosure is the same as the number of locking assemblies 300, and is provided one by one.

[0090] Referring to Figure 5 and Figure 6 , the locking assembly 300 of the present disclosure can comprise a limiting component 310, a locking pin 320, a button 330, a spring 340 and the like.

[0091] The limiting component 310 of the present disclosure can be fixed to the inner sheath seat 400; in one specific embodiment, the limiting component 310 can be fixed to the inner sheath seat 400 by welding, and the center axis of the limiting component 310 coincides with the center axis of the mounting hole of the inner sheath seat 400.

[0092] The locking pin 320 disclosed herein is used to lock the outer sheath component 100 and the inner sheath component 200. In a specific embodiment, during the locking process of the inner sheath component 200 and the outer sheath component 100, the locking pin 320 can be driven by the outer sheath component 100 to move from a first position to a second position; when the position of the locking pin 320 corresponds to the locking groove 110 of the outer sheath component 100, the locking pin 320 moves from the second position to the first position, so that the locking pin 320 engages with the first locking surface 111, and the axial position of the inner sheath component 200 relative to the outer sheath component 100 is limited by the locking pin 320.

[0093] Specifically, the mounting hole of the inner sheath seat 400 of this disclosure is used to guide the movement of the locking pin 320 between a first position and a second position, and the limiting member 310 is used to limit the locking pin 320 in the first position.

[0094] Figure 7 This is a schematic diagram of the locking pin of an endoscope sheath according to one embodiment of the present disclosure.

[0095] like Figure 7 As shown, the locking pin 320 of this disclosure includes components such as a guide portion 321, a locking portion 322, and a connecting portion 323 that connects the guide portion 321 and the locking portion 322.

[0096] The guide portion 321 is used to be guided by the mounting hole of the inner sheath seat 400, and the locking pin 320 will not rotate relative to the inner sheath seat 400, but can only slide along the central axis of the mounting hole.

[0097] In addition, such as Figure 7 As shown, an outer flange 324 is formed at the lower end of the guide portion 321 of the locking pin 320. The outer flange 324 cooperates with the limiting member 310 so that the locking pin 320 is restricted in position by the limiting member 310.

[0098] The locking part 322 is connected to the guide part 321 via the connecting part 323, wherein the size of the connecting part 323 is smaller than the interval distance in the circumferential direction; the guide part 321 includes a second locking surface 325, which is used to cooperate with the first locking surface 111 so that the inner sheath part 200 and the outer sheath part 100 are locked.

[0099] In one specific embodiment, the size of the locking portion 322 is larger than the interval distance in the circumferential direction, so that the second locking surface 325 of the locking portion 322 can simultaneously contact and engage with the first locking surface 111 on the first stop portion 130 and the first locking surface 111 on the second stop portion 140.

[0100] In the present disclosure, the size of the locking portion 322 is larger than the size of the connecting portion 323 in the circumferential direction; at least part of the surface of the connecting portion 323 connected to the locking portion 322 is formed into a guide surface 326, which is used to cooperate with the first guide surface 131. Specifically, the connecting portion 323 is arranged at the substantially middle position of the upper surface of the locking portion 322, so that both sides of the connecting portion 323 in the circumferential direction are formed with the guide surface 326, one of the two guide surfaces 326 can cooperate with the first guide surface 131, and the other can cooperate with the second guide surface 141, so that the locking pin 320 of the present disclosure can be smoothly slid without being stuck.

[0101] Referring again to Figure 5 and Figure 6 , the upper end of the guide portion 321 of the locking pin 320 of the present disclosure is installed with a button 330, the guide portion 321 of the locking pin 320 is sleeved with a spring 340, one end of the spring 340 is abutted against the limiting member 310, the other end of the spring 340 is abutted against the button 330, and the spring 340 is in a pre-compressed state, so that the spring 340 can exert an upward force on the locking pin 320 through the button 330, which can make the outer flange 324 of the locking pin 320 in pressure contact with the limiting member 310, i.e. the outer flange 324 exerts an upward force on the limiting member 310 from the lower side of the limiting member 310, at this time, the locking pin 320 can be stably limited in the first position.

[0102] When the endoscope sheath of the present disclosure is installed, the inner sheath member 200 can be weldedly connected with the inner sheath seat 400, the locking pin 320 passes out from the inner side of the inner sheath seat 400 through the limiting member 310, the threaded end of the locking pin 320 faces the outer side, the spring 340 is sleeved on the locking pin 320 from the outer side, then the button 330 is threadedly connected with the locking pin 320, and the assembly is completed.

[0103] Figure 8 is a structural schematic view of an inner sheath seat of an endoscope sheath according to an embodiment of the present disclosure.

[0104] As Figure 8 shown, the inner part of the inner sheath seat 400 of the present disclosure is formed into a positioning protrusion 410, which can be inserted into the positioning groove 120 of the outer sheath member 100, so that the inner sheath seat 400 of the present disclosure and the outer sheath member 100 are fixed in position in the circumferential direction, and correspondingly, the inner sheath member 200 and the outer sheath member 100 are also fixed in position in the circumferential direction.

[0105] Figure 9 is a schematic view of the assembly process of an endoscope sheath according to an embodiment of the present disclosure. Figure 10is a cross-sectional structure schematic view of an endoscope sheath in a combined state according to an embodiment of the present disclosure.

[0106] As shown in Figure 9 and Figure 10 When the inner sheath component 200 and the outer sheath component 100 are assembled, i.e. the central axes of the inner sheath component 200 and the outer sheath component 100 coincide, the guide surfaces 326 are arranged parallel to the first guide surface 131 and the second guide surface 141, and the first locking surface 111 and the second locking surface 325 are also arranged parallel.

[0107] In the state shown in Figure 9 When the inner sheath component 200 is inserted into the outer sheath component 100, the first guide surface 131 will be in contact with one of the guide surfaces 326, and correspondingly, the second guide surface 141 will be in contact with the other guide surface 326. Next, when pressure is applied to the inner sheath component 200 or the outer sheath component 100 in the axial direction, the first guide surface 131 will slide relative to the one guide surface 326, and correspondingly, the second guide surface 141 will slide relative to the other guide surface 326, and the locking pin 320 will move in a direction approaching the central axis, and the locking pin 320 will move from the first position to the second position.

[0108] When the pressure applied to the inner sheath component 200 or the outer sheath component 100 in the axial direction is continued, the locking pin 320 will move to the position corresponding to the locking groove 110, at which time the locking pin 320 will move in a direction away from the central axis under the action of the restoring force provided by the spring 340, at which time the first locking surface 111 and the second locking surface 325 are in contact and fit, so that the inner sheath component 200 and the outer sheath component 100 are limited in position in the axial direction.

[0109] Moreover, since the first locking surface 111 and the second locking surface 325 are both formed as inclined surfaces, when the locking pin 320 moves from the second position to the first position, the locking pin 320 can exert a pulling force on the outer sheath component 100, and the outer sheath component 100 has a movement tendency to move towards the inner sheath component 200, whereby the outer sheath component 100 and the inner sheath component 200 can be more stably locked, and a sealing effect can be formed between the outer sheath component 100 and the inner sheath component 200.

[0110] During the process of inserting the inner sheath component 200 into the outer sheath component 100, the positioning groove 120 cooperates with the positioning protrusion 410, so that the endoscope sheath assembly of the present disclosure has high positioning accuracy. The interface between the inner sheath component 200 and the outer sheath component 100 is a tightly-fitted circular structure, which ensures good coincidence of the shaft center, and the loosening button 330 can still make the locking pin 320 accurately re-engage in the locking groove, restoring the double-locking state, and greatly reducing the probability of disengagement of the inner sheath component 200 and the outer sheath component 100 due to accidental touch during surgery.

[0111] Conversely, when the inner sheath component 200 and the outer sheath component 100 are unlocked, the inner sheath component 200 can be pulled out of the outer sheath component 100 by pressing the button 330 and moving the locking pin 320 from the first position to the second position.

[0112] The endoscope sheath of the present disclosure discards the traditional locking plate design and adopts a button-type locking assembly. The locking structure is compact and does not intrude into the space outside the structure when unlocked. The moving component has small volume and occupies small space, is convenient to disassemble, can be automatically locked, saves the energy of the operator, and solves the problem that the existing inner and outer sheath locking interface has large volume and activity space, and is easily blocked when unlocked.

[0113] The endoscope sheath of the present disclosure has good appearance integrity and is not easy to interfere with surrounding objects. It is convenient to operate, has no complex curved feature parts, has simple and compact structure, and has reliable mechanism operation and simple manufacturing process. The endoscope sheath of the present disclosure has no similar scheme in the market. It takes into account the cost control of the producer, the operation experience of the operator, the size of the product, and the reliability of the mechanism. With the increasing use of endoscopic minimally invasive surgery in various clinical departments, the innovative advantages of the present disclosure will be further manifested.

[0114] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the skilled person in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.

[0115] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0116] Those skilled in the art will understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. An endoscope sheath, characterized in that, include: An outer sheath component having a locking groove, at least a portion of the sidewall of the locking groove being formed as a first locking surface; as well as An inner sheath component is detachably connected to an outer sheath component via a locking assembly. The locking assembly includes a locking pin, which, during locking of the inner and outer sheath components, is driven by the outer sheath component to move from a first position to a second position. When the position of the locking pin corresponds to a locking groove on the outer sheath component, the locking pin moves from the second position to the first position, thereby engaging with a first locking surface and restricting the axial position of the inner sheath component relative to the outer sheath component.

2. The endoscope sheath according to claim 1, characterized in that, The locking components are configured in pairs.

3. The endoscope sheath according to claim 2, characterized in that, The two locking components are evenly distributed circumferentially along the inner sheath component.

4. The endoscope sheath according to claim 1, characterized in that, Also includes: An inner sheath seat is fixed to the inner sheath component; wherein, the inner sheath seat has a mounting hole along the radial direction of the inner sheath seat; the mounting hole is used to guide the movement of the locking pin between a first position and a second position.

5. The endoscope sheath according to claim 4, characterized in that, One end of the outer sheath component is provided with a groove, which extends from one end of the outer sheath component along the central axis of the outer sheath component; a first stop and a second stop are formed at the opening of the groove, which are used to define the locking groove.

6. The endoscope sheath according to claim 5, characterized in that, The first stop and the second stop are spaced apart in the circumferential direction.

7. The endoscope sheath according to claim 6, characterized in that, The surface of the first stop portion near the bottom wall of the groove is formed as a first locking surface, and the surface of the second stop portion near the bottom wall of the groove is also formed as a first locking surface.

8. The endoscope sheath according to claim 7, characterized in that, The surface of the first stop portion near the central axis of the outer sheath component is formed as a first guide surface. Along the direction in which the inner sheath component is inserted into the outer sheath component, the first guide surface is formed as an inclined surface that gradually approaches the central axis of the outer sheath component.

9. The endoscope sheath according to claim 8, characterized in that, The locking pin includes: A guide portion, the guide portion being guided by the mounting hole of the inner sheath seat; A locking part is connected to the guide part via a connecting part, wherein the size of the connecting part is smaller than the interval distance in the circumferential direction; the guide part includes a second locking surface for engaging with the first locking surface to lock the inner sheath component and the outer sheath component.

10. The endoscope sheath according to claim 9, characterized in that, Along the circumferential direction, the size of the locking part is greater than the interval distance.

11. The endoscope sheath according to claim 9, characterized in that, Along the circumferential direction, the size of the locking part is larger than the size of the connecting part; at least a portion of the surface of the locking part connected to the connecting part is formed as a guide surface, which is used to mate with the first guide surface.

12. The endoscope sheath according to claim 11, characterized in that, The guiding surface is arranged parallel to the first guiding surface.

13. The endoscope sheath according to claim 11, characterized in that, The first locking surface is provided at an angle, wherein, along the direction in which the inner sheath component is inserted into the outer sheath component, the first locking surface is formed as an inclined surface that gradually moves away from the central axis of the outer sheath component.

14. The endoscope sheath according to claim 13, characterized in that, The first locking surface and the second locking surface are arranged parallel to each other.

15. The endoscope sheath according to claim 4, characterized in that, The inner sheath seat is provided with a limiting component, which is used to limit the locking pin to a first position.

16. The endoscope sheath according to claim 15, characterized in that, The lower end of the guide portion of the locking pin has an outer flange, which cooperates with the limiting component to restrict the position of the locking pin.

17. The endoscope sheath according to claim 16, characterized in that, A button is installed at the upper end of the guide portion of the locking pin, and a spring is sleeved on the guide portion of the locking pin. One end of the spring rests against the limiting component, and the other end of the spring rests against the button.

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