Sheath and endoscope system

Abstract

The present disclosure provides a scope sheath and an endoscope system. The scope sheath comprises a main body, a fastener and a locking plate; the fastener is fixed to the main body, and the main body and the fastener form a guide structure; the locking plate is guided by the guide structure to be able to move between a first position and a second position; wherein when the locking plate is in the first position, the locking plate can lock an endoscope installed on the scope sheath; when the locking plate is in the second position, the endoscope is allowed to be removed from the scope sheath; wherein the locking plate comprises a guide portion, wherein the guide portion is used to cooperate with at least part of the sliding profile of the endoscope, so that when the endoscope moves in a first direction, the endoscope can drive the locking plate from the first position to the second position; after the endoscope is inserted into the scope sheath, the locking plate moves from the second position to the first position, and the position of the endoscope is limited by the guide portion. The present disclosure improves the guide portion of the scope sheath, reduces the pushing force when the endoscope is inserted into the scope sheath, and also improves the service life of the scope sheath.

Description

TECHNICAL FIELD

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

[0002] The part provided in this section is merely background information related to the present disclosure, which does not necessarily have to be prior art.

[0003] During use, a medical endoscope needs to enter a patient's body through a sheath to establish a working channel and form a stable and reliable positioning and connection at the sheath interface.

[0004] The mainstream sheaths on the market currently include two forms: a rotating locking type interface and a self-locking type interface.

[0005] In the sheath with the rotating locking type interface, the locking plate is in threaded connection with the sheath body. The groove at the interface of the endoscope is inserted into the positioning block of the sheath interface. The operator rotates the lever clockwise. The locking plate moves axially, and the two locking surfaces on the outer end surface of the locking plate are screwed into the locking groove of the endoscope, thereby tensioning the endoscope axially. Then, a certain force is applied to the lever to tighten the locking plate, thereby locking the endoscope. The sheath with this structure needs to apply a locking force manually during use, which is complicated to operate, wastes the energy of the operator, has many parts, a complicated assembly process, and a high manufacturing cost.

[0006] The prior art CN219782490U discloses a locking structure of an endoscope sheath. That is, the prior art discloses a sheath with a self-locking type locking interface. During use of the sheath, the groove at the interface of the endoscope is inserted into the positioning block of the sheath interface. After the endoscope contacts the inclined surface of the locking plate, the endoscope is pushed with force. The locking plate moves downward along the fixed pin under the downward component force. After the endoscope is pushed into place, the locking plate automatically rebounds under the action of the spring, the locking surface is clamped into the locking groove of the endoscope, and the endoscope is automatically locked. The inclined surface feature of the locking plate of the sheath with this structure is a traditional conical inclined surface. The resistance is large when the endoscope is inserted. A large force is needed to push the endoscope to make the locking plate displace. The contact area between the inclined surface and the endoscope is small during the pushing process. Repeated use can cause the inclined surface to wear and appear concave. In severe cases, the endoscope is stuck and cannot be pushed in, which reduces the service life of the sheath. The sheath with this structure has many parts, a complicated assembly process, and a high manufacturing cost.

[0007] In addition, the prior art CN217792955U also discloses a locking mechanism and an endoscope device. The locking mechanism comprises a first connecting seat, a second connecting seat, a locking sleeve assembly and a positioning assembly. The outer surface of the first connecting seat is provided with a sliding groove extending in the circumferential direction. The second connecting seat is in butt joint with the first connecting seat, and the second connecting seat is provided with a first limiting protrusion. The locking sleeve assembly is sleeved outside the first connecting seat and the second connecting seat, and is provided with a second limiting protrusion and a avoiding groove. The locking sleeve assembly has a locking position and an unlocking position. When the locking sleeve assembly is in the locking position, the first limiting protrusion is in clamping connection with the second limiting protrusion. When the locking sleeve assembly is in the unlocking position, the second limiting protrusion is separated from the first limiting protrusion. One end of the positioning assembly penetrates through the inner surface of the locking sleeve assembly and extends into the sliding groove. When the locking sleeve assembly enters the locking position, one end of the positioning assembly slides to one end of the sliding groove. When the locking sleeve assembly enters the unlocking position, one end of the positioning assembly slides to the other end of the sliding groove. However, the prior art has many parts, the assembly process is complex, and the operation is complex when locking or loosening the endoscope. SUMMARY

[0008] The present disclosure provides an endoscope sheath and an endoscope system.

[0009] According to one aspect of the present disclosure, an endoscope sheath for mounting an endoscope is provided, comprising:

[0010] a body portion comprising a central axis, the body portion being capable of inserting and being fixed to the endoscope sheath when the endoscope moves along the central axis in a first direction, and being capable of being removed from the endoscope sheath when the endoscope moves along the central axis in a second direction;

[0011] a fastener fixed to the body portion, and the body portion and the fastener forming a guide structure; and

[0012] a locking plate guided by the guide structure to be capable of moving between a first position and a second position; wherein when the locking plate is in the first position, the locking plate is capable of locking the endoscope mounted in the endoscope sheath; and when the locking plate is in the second position, the endoscope is allowed to be removed from the endoscope sheath;

[0013] wherein the locking plate comprises a guide portion, wherein the guide portion is used to cooperate with at least part of a sliding profile of the endoscope, so that when the endoscope moves in the first direction, the endoscope is capable of driving the locking plate from the first position to the second position; and when the endoscope is inserted into the endoscope sheath, the locking plate moves from the second position to the first position, and the position of the endoscope is limited by the guide portion.

[0014] According to the endoscope sheath of at least one embodiment of the present disclosure, the guide portion is formed in two, and the two guide portions are respectively located at two ends in the circumferential direction of the inner flange portion.

[0015] According to the scope of the present disclosure, the locking plate further comprises an inner flange portion, the guide portion is formed as a guide groove, and the corner portion of the sliding profile of the endoscope can be slidably arranged in the guide groove and guided by the guide groove.

[0016] According to the scope of the present disclosure, the guide portion comprises a first guide surface, a second guide surface and a third guide surface, wherein the first guide surface, the second guide surface and the third guide surface are all formed as a wall surface of the guide groove.

[0017] According to the scope of the present disclosure, the first guide surface is arranged adjacent to the inner flange portion, wherein the first guide surface is used to contact at least part of the sliding profile of the endoscope, so that the sliding profile of the endoscope can apply a pushing force to the first guide surface, and the locking plate is moved from the first position to the second position.

[0018] According to the scope of the present disclosure, the first guide surface is arranged obliquely and extends in a first direction from one end of the locking plate, wherein in the first direction, the first guide surface extends obliquely upward.

[0019] According to the scope of the present disclosure, the second guide surface is located between the first guide surface and the third guide surface, and during the insertion of the endoscope into the scope, the corner portion of the sliding profile of the endoscope slides along the second guide surface, so that the sliding profile of the endoscope can apply a pushing force to the second guide surface, and the locking plate is moved from the first position to the second position.

[0020] According to the scope of the present disclosure, the second guide surface is arranged obliquely and extends in a first direction from one end of the locking plate, and in the first direction, the second guide surface extends obliquely upward.

[0021] According to the scope of the present disclosure, the third guide surface is arranged obliquely, and at least part of the third guide surface is inwardly contracted in the first direction.

[0022] According to the scope of the present disclosure, the guide structure is formed as a guide groove, and part of the surface of the fastener is formed as a side wall of the guide groove.

[0023] According to the scope of the present disclosure, the main body portion comprises a base portion and an extension portion connected to the base portion, and a step structure is formed on the extension portion, and the step structure forms the guide groove with the fastener.

[0024] According to the mirror sheath of at least one embodiment of the present disclosure, the step structure includes a first guide surface and a second guide surface, both of which are formed in a planar shape, the first guide surface is formed as a side wall of the guide groove, and the second guide surface is formed as a bottom wall of the guide groove.

[0025] According to the mirror sheath of at least one embodiment of the present disclosure, one end of the extension portion is connected to the base portion, the other end of the extension portion is connected to one end of the threaded segment, an outer peripheral surface of the threaded segment is formed with external threads, a fastener is formed with internal threads, the fastener is fixed to the threaded segment by cooperation of the internal threads and the external threads, and part of a surface of the fastener is formed as a side wall of the guide groove.

[0026] According to the mirror sheath of at least one embodiment of the present disclosure, an inner surface of the locking plate is formed with a guide member, the guide member can be guided by the guide structure and can slide relative to the guide structure.

[0027] According to the mirror sheath of at least one embodiment of the present disclosure, the guide member is formed as a rib structure including a first surface and a second surface in the direction of the central axis, the first surface of the rib structure is used to cooperate with the first guide surface, and the second surface of the rib structure is used to cooperate with the surface of the fastener.

[0028] According to the mirror sheath of at least one embodiment of the present disclosure, the rib structure includes a guide plane parallel to the central axis, and the guide plane is slidably attached to the second guide surface.

[0029] According to the mirror sheath of at least one embodiment of the present disclosure, an elastic member is arranged between the main body portion and the locking plate, the elastic member is in a pre-compressed state, and the locking plate has a tendency to move from the second position to the first position through the elastic member.

[0030] According to another aspect of the present disclosure, an endoscope system is provided, which includes the above-described mirror sheath.

[0031] Beneficial effects: In the mirror sheath of the present disclosure, the sliding resistance of the contact position with the locking plate when the endoscope is pushed in is reduced by improving the guide portion, the resistance during the endoscope installation process is small, and the technical problem that the guide inclined surface in the prior art is prone to wear is also avoided. When the position of the endoscope is fixed, the endoscope can be fixed by the guide portion, and the endoscope can be firmly fixed. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0033] Figure 1 is a structural diagram of an endoscope in the related art.

[0034] Figure 2 is a structural diagram of an endoscope system according to an embodiment of the disclosure.

[0035] Figure 3 is an exploded structural diagram of an endoscope system according to an embodiment of the disclosure.

[0036] Figure 4 is a cross-sectional structural diagram of an endoscope system according to an embodiment of the disclosure.

[0037] Figure 5 is a cross-sectional structural diagram of an endoscope system according to an embodiment of the disclosure.

[0038] Figure 6 is an exploded structural diagram of a scope sheath according to an embodiment of the disclosure.

[0039] Figure 7 is a structural diagram of a locking plate according to an embodiment of the disclosure.

[0040] Figure 8 is a structural diagram of an endoscope and a locking plate according to an embodiment of the disclosure.

[0041] The reference numerals in the drawings are specifically as follows:

[0042] 100 endoscope

[0043] 110 fixing piece

[0044] 111 first portion

[0045] 112 second portion

[0046] 113 corner portion

[0047] 114 positioning groove

[0048] 200 scope sheath

[0049] 210 main body portion

[0050] 211 base portion

[0051] 212 extension portion

[0052] 213 first guide surface

[0053] 214 second guide surface

[0054] 215 threaded section

[0055] 216 positioning member

[0056] 220 fastener

[0057] 230 lock plate

[0058] 231 guide member

[0059] 231A second guide surface

[0060] 232 guide portion

[0061] 232A first guide surface

[0062] 232B second guide surface

[0063] 232C third guide surface

[0064] 233 inner flange portion

[0065] 240 elastic member DETAILED DESCRIPTION

[0066] The present disclosure will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only intended to explain the relevant content, and not to limit the present disclosure. In addition, it should be noted that only parts related to the present disclosure are shown in the drawings for ease of description.

[0067] It should be noted that the embodiments in the present disclosure and the features in the embodiments 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.

[0068] 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.

[0069] The use of cross-hatching and / or shading in the drawings is generally used to illustrate the boundaries and / or transitions between adjacent portions of a part. As such, unless specified, the presence or absence of cross-hatching and / or shading is not intended to convey or imply any preference or requirement for specific material, material properties, dimensions, proportions, commonality of the illustrated parts between the parts, and / or any other characteristic, attribute, property, etc. of the parts. Moreover, in the drawings, the size and relative sizes of parts can be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be practiced differently, a specific sequence of processes can be performed in a different order than described. For example, two consecutively described processes can be performed substantially simultaneously or in the opposite order to that described. Moreover, like reference numerals can denote like parts throughout the specification.

[0070] When a part is referred to as being "on" or "over" another part, "connected to" or "coupled to" another part, it can be directly on, directly connected to, or directly coupled to the other part, or intervening parts can be present. However, when a part is referred to as being "directly on", "directly connected to", or "directly coupled to" another part, there are no intervening parts. In this regard, the term "connected" can mean physical, electrical, and / or the like, with or without intervening parts.

[0071] For descriptive purposes, the disclosure can use spatial or relative terms, such as "below", "lower", "lowermost", "above", "upper", "uppermost", "over", "on", "side" (e.g., as in "side wall") to describe the relationship between one part and another as illustrated in the figures. The spatial and / or relative terms can be used to describe the orientation of the device in use, operation, and / or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, the part described as "below" or "under" the other part or feature would then be oriented "above" the other part or feature. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations. Moreover, the device can be oriented in further positions (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptions used herein interpreted accordingly.

[0072] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including," "includes," "having," "has," "with," or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term "comprising." It is also to be noted that the term "substantially" and other similar terms are used herein to refer to the inherent deviation in measured, calculated, and / or provided values that would be apparent to one of ordinary skill in the art, such as manufacturing tolerances, variability in measurements, and / or computer-implemented values, and other such deviations.

[0073] Figure 1 is a structural schematic diagram of an endoscope in the prior art.

[0074] As shown in Figure 1 The endoscope 100 in the prior art generally includes a fixing sheet 110, and through cooperation of the fixing sheet 110 and a sheath 200, locking of the endoscope 100 is achieved.

[0075] Specifically, the fixing sheet 110 of the present disclosure includes a first part 111 which is substantially circular, and a second part 112 extending radially outward from the first part 111, wherein the second part 112 is provided in two, and the two second parts 112 are symmetrically provided. Each second part 112 includes a corner portion 113. Thus, the outer contour of the fixing sheet 110 of the present disclosure, i.e., the sliding contour of the endoscope 100.

[0076] Moreover, the first part 111 is further provided with a positioning groove 114, which penetrates the first part 111 along the thickness direction of the first part 111.

[0077] Since the endoscope 100 is a structure in the prior art, the present disclosure will not be described one by one.

[0078] Figure 2 is a structural schematic diagram of an endoscope system according to one embodiment of the present disclosure. Figure 3 is an exploded structural schematic diagram of an endoscope system according to one embodiment of the present disclosure. Figure 4 is a cross-sectional structural schematic diagram of an endoscope system according to one embodiment of the present disclosure. Figure 5 is a cross-sectional structural schematic diagram of an endoscope system according to one embodiment of the present disclosure.

[0079] As shown in Figures 2 to 5As shown, the endoscope system of the present disclosure comprises an endoscope 100 and a scope sheath 200, wherein the scope sheath 200 is used to mount the endoscope 100. In other words, the endoscope system of the present disclosure, when in use, can insert the endoscope 100 into the scope sheath 200, at this time, the scope sheath 200 can lock the endoscope 100. Accordingly, when it is necessary to disassemble the endoscope 100 from the scope sheath 200, the locking plate 230 described below can be driven to act, so that the scope sheath 200 releases the endoscope 100, and then the endoscope 100 can be pulled out of the scope sheath 200.

[0080] Specifically, the scope sheath 200 of the present disclosure can comprise a main body 210, a fastener 220 and a locking plate 230 and the like components.

[0081] In the present disclosure, the main body 210 comprises a central axis, which can be a horizontal straight line in the left-right direction. When the endoscope 100 moves along the central axis in the first direction, it can be inserted and fixed in the scope sheath 200; when the endoscope 100 moves along the central axis in the second direction, it can be removed from the scope sheath 200; accordingly, in the direction shown, the first direction is the left direction, and the second direction is the right direction. That is, the first direction and the second direction of the present disclosure are opposite directions. In addition, the central axis direction of the present disclosure can include the first direction and the second direction. Figures 2 to 5 Figures 2 to 5 In the present disclosure, the main body 210 of the present disclosure is formed with a central hole, at this time, the axis of the central hole is the central axis described above. Moreover, at least part of the endoscope 100 can pass through the central hole. More preferably, as shown in and

[0082] , the right end of the central hole of the main body 210 of the present disclosure is formed as a tapered hole, an annular groove is provided on the hole wall of the tapered hole, and an O-ring is arranged in the annular groove. When at least part of the endoscope 100 is inserted into the central hole, the tapered portion of the endoscope 100 can closely fit with the hole wall of the tapered hole, and the O-ring forms a sealed connection between the main body 210 and the endoscope 100. Figure 4 Figure 5 As shown, the fastener 220 is fixed to the main body 210, and the main body 210 and the fastener 220 form a guide structure; accordingly, under the guidance of the guide structure, the locking plate 230 can be driven and moved in the vertical direction (in the direction of and

[0083] . Figures 2 to 5 Figure 3 Figure 4

[0084] ​​​Specifically, the locking plate 230 is guided by the guide structure to be movable between a first position and a second position; wherein, when the locking plate 230 is located at the first position, the locking plate 230 can lock the endoscope 100 mounted on the scope sheath 200; when the locking plate 230 is located at the second position, the endoscope 100 is allowed to be removed from the scope sheath 200; in other words, the locking plate 230 of the present disclosure can be located at the first position and the second position when moving in the vertical direction; wherein, the first position is higher than the second position.

[0085] For example, when the endoscope 100 is mounted on the scope sheath 200, a leftward force can be applied to the endoscope 100, at this time, the endoscope 100 can drive the locking plate 230 to move downward, so that the locking plate 230 moves from the first position to the second position. When the endoscope 100 is inserted to a preset position, the locking plate 230 can move upward under the action of the reset force provided by the elastic member 240, and move from the second position to the first position, so that the locking plate 230 locks the endoscope 100 at the preset position. Conversely, when the endoscope 100 is removed from the scope sheath 200, a downward force can be applied to the locking plate 230, and the locking plate 230 moves downward to move from the first position to the second position. At this time, a rightward force can be applied to the endoscope 100, so that the endoscope 100 is removed from the scope sheath 200. At the same time, when the force applied to the locking plate 230 disappears, the locking plate 230 can move upward to the first position under the action of the reset force provided by the elastic member 240, and stay at the first position.

[0086] Figure 6 is an exploded structural schematic view of a scope sheath according to an embodiment of the present disclosure.

[0087] As shown in Figures 4 to 6 , the guide structure of the present disclosure is formed as a guide groove; and the main body part 210 of the present disclosure includes a base part 211 and an extension part 212 connected with the base part 211, the extension part 212 is formed with a stepped structure, which cooperates with the fastener 220 to form the guide groove.

[0088] Specifically, as shown in Figure 6 , the stepped structure includes a first guide surface 213 and a second guide surface 214, both of which are formed as planar surfaces, the first guide surface 213 is formed as a side wall of the guide groove, and the second guide surface 214 is formed as a bottom wall of the guide groove. Preferably, the first guide surface 213 is arranged substantially perpendicular to the central axis. The second guide surface 214 is arranged substantially parallel to the central axis, and the second guide surface 214 is arranged substantially vertically.

[0089] In the present disclosure, the step structure is provided as two, which are symmetrically arranged, whereby under the guiding action of the guiding structure, the locking plate 230 can stably slide in the vertical direction. Accordingly, the locking plate 230 of the sheath 200 of the present disclosure is directly mounted on the main body 210, which has high dimensional accuracy and balanced sliding stress.

[0090] One end of the extension 212 is connected with the base 211, and the other end of the extension 212 is connected with one end of the threaded segment 215. At this time, the outer circumferential surface of the threaded segment 215 is formed with external threads, and the fastener 220 is formed with internal threads, which can be fixed to the threaded segment 215 (i.e. to the main body 210) by threaded connection, at this time, part of the surface of the fastener 220 is formed as the side wall of the guiding groove. The fastener 220 can be in pressure contact with the end surface of the other end of the extension 212, so that the fastener 220 will not be loosened from the main body 210, accordingly, the sheath 200 of the present disclosure can be installed and disassembled by the fastening action of the fastener 220, which is very convenient in the installation and disassembly process.

[0091] Referring again to Figure 6 , the other end of the threaded segment 215 of the present disclosure is formed with a positioning component 216, which includes a protrusion extending from the threaded segment 215 in the second direction. Thus, when the endoscope 100 is installed in the sheath 200, the positioning component 216 can be inserted into the positioning groove 114 of the endoscope 100, so that the position of the endoscope 100 in the circumferential direction can be limited.

[0092] Figure 7 is a structural schematic diagram of a locking plate according to an embodiment of the present disclosure. Figure 8 is a schematic diagram of the cooperation structure of an endoscope and a locking plate according to an embodiment of the present disclosure.

[0093] As Figures 2 to 8 shown, the inner surface of the locking plate 230 of the present disclosure is formed with a guiding component 231, which can be guided by the guiding structure and can slide relative to the guiding structure, accordingly, the locking plate 230 of the present disclosure can only move in the up-down direction.

[0094] Specifically, as Figure 7 shown, the guiding component 231 is formed as a rib structure, which includes a first surface and a second surface in the central axis direction (including the first direction and the second direction), wherein the first surface of the rib structure is used to cooperate with the first guiding surface 213, and the second surface of the rib structure is used to cooperate with the surface of the fastener 220.

[0095] More specifically, the rib structure is configured as two, each rib structure including a guide plane 231A parallel to the central axis, the guide plane 231A being slidably attached to the second guide surface 214.

[0096] like Figure 4 As shown, an elastic member 240 is provided between the main body 210 and the locking plate 230 of this disclosure. The elastic member 240 is in a pre-compressed state so that the locking plate 230 has a tendency to move from the second position to the first position.

[0097] See again Figure 7 The locking plate 230 of this disclosure includes a guide portion 232 and an inner flange portion 233. The guide portion 232 engages at least partially with the sliding profile of the endoscope 100, such that when the endoscope 100 moves in a first direction, the endoscope 100 can drive the locking plate 230 from a first position to a second position. When the endoscope 100 is inserted into the sheath 200, the locking plate 230 moves from the second position to the first position and restricts the position of the endoscope 100 via the guide portion 232. In a preferred embodiment, the inner flange portion 233 of this disclosure contacts the fixing plate 110 only at the portion connected to the guide portion 232, and applies force to the fixing plate 110 to lock the endoscope. Between the two ends of the inner flange portion 233 in the circumferential direction, the inner flange portion 233 does not contact the fixing plate 110. In other words, after the endoscope 100 of this disclosure is installed in the sheath, only the corner 113 of the endoscope's fixing piece 110 is fixed, thereby enabling the endoscope of this disclosure to be disassembled with only a small amount of force.

[0098] In other words, unlike the prior art, when the endoscope 100 is inserted into the endoscope sheath 200, the endoscope 100 drives the locking plate 230 only through the drive guide 232, which reduces the sliding resistance at the contact position between the endoscope 100 and the locking plate when it is pushed in, resulting in less resistance during the installation of the endoscope 100. It also avoids the technical problem of easy wear on the guide slope in the prior art. When fixing the position of the endoscope 100, the endoscope 100 can be fixed by the guide 232, or the endoscope 100 can be fixed by the guide 232 and the inner flange 233 together, so that the endoscope 100 can be firmly fixed.

[0099] In a preferred embodiment, the guide portion 232 is formed as two, with the two guide portions 232 located at the two ends of the inner flange portion 233 in the circumferential direction, thereby enabling at least two portions (i.e. two second portions) of the sliding profile of the endoscope 100 to push the locking plate 230 to produce vertical movement.

[0100] In this disclosure, the guide portion 232 is formed as a guide groove, and the corner of the sliding profile of the endoscope 100 can be slidably disposed in the guide groove and guided by the guide groove. In particular, the guide groove can also be referred to as a contour groove, which can correspond to the structure of the corner of the sliding profile of the endoscope 100, and enable the sliding profile of the endoscope 100 to be stably located in the contour groove.

[0101] like Figure 6 and Figure 7 As shown, the guide portion 232 of this disclosure may include a first guide surface 232A, a second guide surface 232B, and a third guide surface 232C, wherein the first guide surface 232A, the second guide surface 232B, and the third guide surface 232C are all formed as the wall surface of the guide groove. In this disclosure, the first guide surface 232A, the second guide surface 232B, and the third guide surface 232C are formed as continuous curved surfaces.

[0102] Specifically, a first guide surface 232A is disposed adjacent to the inner flange portion 233. The first guide surface 232A extends from one end of the locking plate 230 along a first direction and extends upwardly along the first direction. Thus, when the first guide surface 232A contacts at least a portion of the sliding profile of the endoscope 100, the sliding profile of the endoscope 100 can apply a thrust to the first guide surface 232A, causing the locking plate 230 to move from a first position to a second position.

[0103] Furthermore, the second guide surface 232B of this disclosure is located between the first guide surface 232A and the third guide surface 232C. The second guide surface 232B extends from one end of the locking plate 230 along a first direction and extends upward along the first direction. Therefore, when the second guide surface 232B contacts the corner of the sliding profile of the endoscope 100, the sliding profile of the endoscope 100 can apply a pushing force to the second guide surface 232B, causing the locking plate 230 to move from the first position to the second position. Moreover, when the endoscope 100 slides relative to the locking plate 230, the corner of the sliding profile of the endoscope 100 can always slide along the second guide surface 232B, thereby making the engagement and positioning of the endoscope more accurate. That is, the guide portion 232 of this disclosure can limit the circumferential direction of the endoscope 100 to prevent the endoscope from rotating during insertion into the sheath.

[0104] In addition, the third guide surface 232C of the present disclosure is also arranged obliquely, for example, in the first direction, at least part of the third guide surface 232C is inwardly tapered, that is, in this direction, the third guide surface 232C is inclined to the axis direction close to the locking plate 230, thereby, the third guide surface 232C can realize the pre-positioning of the corner portion 113 of the fixed sheet 110, that is, when the corner portion 113 is in contact with the third guide surface 232C, the third guide surface 232C can limit the rotation of the endoscope.

[0105] In the scope of the present disclosure, the main body part 210 and the locking plate 230 are integrally processed, the manufacturing process is simple, and the manufacturing time and cost are saved. The guide part 232 of the locking plate 230 is formed with a profiled guide groove through the inclined surface feature, which reduces the resistance when the endoscope 100 is inserted, and the scope of the present disclosure can automatically lock the endoscope, saving the energy of the operator, solving the problem that the endoscope locking interface in the prior art needs to be manually locked, the operation is complicated, or a large force is needed to install the endoscope, the operation is not convenient, and the parts are many, the assembly process is complex, and the manufacturing cost is high.

[0106] Moreover, through the design of the profiled guide groove, the contact area between the locking plate 230 and the endoscope 100 is increased, the first guide surface 232A, the second guide surface 232B and the third guide surface 232C forming the guide groove are not easy to be stuck with the endoscope and generate wear depressions, and the repeated use life is longer.

[0107] In the description of the present specification, the description referring to 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 person skilled 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.

[0108] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, 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 "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0109] Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A scope sheath for mounting an endoscope, characterized by, The utility model relates to a locking device for endoscope, comprising: a main body part comprising a central axis, the endoscope can be inserted into and fixed in the sheath when moving along the central axis in a first direction; the endoscope can be removed from the sheath when moving along the central axis in a second direction; a fastener fixed to the main body part, and the main body part and the fastener form a guide structure; and a locking plate guided by the guide structure and capable of moving between a first position and a second position; when the locking plate is in the first position, the locking plate can lock the endoscope installed in the sheath; when the locking plate is in the second position, the endoscope can be removed from the sheath; wherein the locking plate comprises a guide part, wherein the guide part is used to cooperate with at least part of the sliding profile of the endoscope, so that when the endoscope moves in the first direction, the endoscope can drive the locking plate from the first position to the second position; when the endoscope is inserted into the sheath, the locking plate moves from the second position to the first position, and the position of the endoscope is limited by the guide part; the locking plate further comprises an inner flange part, the guide part is formed in two, and the two guide parts are respectively located at two ends in the circumferential direction of the inner flange part; the guide part is formed as a guide groove, and the corner of the sliding profile of the endoscope can be slidably arranged in the guide groove and guided by the guide groove; the guide part comprises a first guide surface, a second guide surface and a third guide surface, wherein the first guide surface, the second guide surface and the third guide surface are all formed as wall surfaces of the guide groove; the second guide surface is located between the first guide surface and the third guide surface, and during the process of inserting the endoscope into the sheath, the corner of the sliding profile of the endoscope slides along the second guide surface, so that the sliding profile of the endoscope can apply a pushing force to the second guide surface, and the locking plate moves from the first position to the second position; the third guide surface is inclinedly arranged, and at least part of the third guide surface is inwardly contracted in the first direction.

2. The speculum according to claim 1, wherein, the first guide surface is arranged adjacent to the inner flange part, wherein the first guide surface is used to contact at least part of the sliding profile of the endoscope, so that the sliding profile of the endoscope can apply a pushing force to the first guide surface, and the locking plate moves from the first position to the second position.

3. The speculum according to claim 1, wherein, the first guide surface is inclinedly arranged and extends from one end of the locking plate in the first direction; wherein in the first direction, the first guide surface extends upwardly and obliquely.

4. The speculum according to claim 1, wherein, the second guide surface is inclinedly arranged and extends from one end of the locking plate in the first direction, and in the first direction, the second guide surface extends upwardly and obliquely.

5. The speculum according to claim 1, wherein, the guide structure is formed as a guide groove, and part of the surface of the fastener is formed as a side wall of the guide groove.

6. The speculum according to claim 5, wherein, the main body part comprises a base and an extension connected with the base, and a step structure is formed on the extension, and the step structure and the fastener form the guide groove.

7. The speculum according to claim 6, wherein, The step structure includes a first guide surface and a second guide surface, both of which are formed in a planar shape, the first guide surface is formed as a side wall of the guide groove, and the second guide surface is formed as a bottom wall of the guide groove.

8. The speculum according to claim 6, wherein, One end of the extension part is connected with the base part, the other end of the extension part is connected with one end of the threaded segment, an outer peripheral surface of the threaded segment is formed with external threads, the fastener is formed with internal threads, the fastener is fixed to the threaded segment by cooperation of the internal threads and the external threads, and part of a surface of the fastener is formed as a side wall of the guide groove.

9. The speculum according to claim 5, wherein, An inner surface of the locking plate is formed with a guide part, the guide part can be guided by the guide structure and can slide relative to the guide structure.

10. The speculum according to claim 9, wherein, The guide part is formed as a rib structure, the rib structure includes a first surface and a second surface in the direction of the central axis, the first surface of the rib structure is used to cooperate with the first guide surface, and the second surface of the rib structure is used to cooperate with the surface of the fastener.

11. The speculum according to claim 10, wherein, The rib structure includes a guide plane parallel to the central axis, and the guide plane is slidably attached to the second guide surface.

12. The speculum according to claim 1, wherein, An elastic part is arranged between the main body part and the locking plate, the elastic part is in a pre-compressed state, and the locking plate has a movement tendency from the second position to the first position by the elastic part.

13. An endoscope system characterized by comprising: The mirror sheath includes any one of claims 1-12. The step structure includes a first guide surface and a second guide surface, both of which are formed in a planar shape, the first guide surface is formed as a side wall of the guide groove, and the second guide surface is formed as a bottom wall of the guide groove. One end of the extension part is connected with the base part, the other end of the extension part is connected with one end of the threaded segment, an outer peripheral surface of the threaded segment is formed with external threads, the fastener is formed with internal threads, the fastener is fixed to the threaded segment by cooperation of the internal threads and the external threads, and part of a surface of the fastener is formed as a side wall of the guide groove. An inner surface of the locking plate is formed with a guide part, the guide part can be guided by the guide structure and can slide relative to the guide structure. The guide part is formed as a rib structure, the rib structure includes a first surface and a second surface in the direction of the central axis, the first surface of the rib structure is used to cooperate with the first guide surface, and the second surface of the rib structure is used to cooperate with the surface of the fastener. The rib structure includes a guide plane parallel to the central axis, and the guide plane is slidably attached to the second guide surface. An elastic part is arranged between the main body part and the locking plate, the elastic part is in a pre-compressed state, and the locking plate has a movement tendency from the second position to the first position by the elastic part. The mirror sheath includes any one of claims 1-12.

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