Endoscope sheath

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope sheath which has a telescopic function. Comprising a connector, a telescopic ring, a telescopic loop bar and an endoscope sheath catheter. The lower end of the connector is detachably connected with the telescopic ring. The telescopic loop bar is inserted into the telescopic ring and is rotationally connected with the telescopic ring; the sheath catheter is inserted into the telescopic loop bar after passing through the joint; the sheath catheter is fixedly connected with the joint; the lower end of the connector is provided with a guide column extending in the axial direction, and a guide column matching groove matched with the guide column is formed in the telescopic sleeve rod. The length of the endoscope sheath can be adjusted, and the rotary motion of the telescopic ring is converted into the axial movement of the endoscope sheath catheter; through precise cooperation of the guide column and the guide groove, the axial movement precision of the connector and the endoscope sheath catheter is achieved, and the gap between the endoscope sheath catheter and the imaging catheter is guaranteed. The endoscope sheath can be operated by a single hand, can be stretched out, drawn back and positioned only by rotating and moving the telescopic ring, and is convenient and reliable to operate and convenient to assemble and install.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a kind of endoscope sheath, it has telescopic function. BACKGROUND

[0002] To avoid cross infection, reduce the time cost and risk brought by repeated disinfection, disposable endoscope sheath will be widely used in clinic.Because sheath needs to play the role of protecting endoscope when inserting or body, so length is longer than or equal to the length of endoscope catheter, and after inserting into patient's body, the lens of endoscope needs to be exposed to get more extensive view, the length of sheath needs to be shorter than endoscope catheter at this time.Therefore, a telescopic and convenient endoscope sheath is needed. SUMMARY

[0003] In order to overcome the problems in the above, an endoscope sheath is provided, which has adjustable length.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme of: an endoscope sheath, comprising a connector, a telescopic ring, a telescopic sleeve rod and a sheath catheter, the lower end of the connector is detachably connected with the telescopic ring.

[0005] The telescopic sleeve rod is inserted into the telescopic ring and rotationally connected with the telescopic ring.

[0006] The sheath catheter is inserted into the telescopic sleeve rod after passing through the connector; the sheath catheter is fixedly connected with the connector.

[0007] The lower end of the connector is provided with an axially extending guide column, and the telescopic sleeve rod is provided with a guide column matching groove matched with the guide column.

[0008] Further, the lower end of the connector is provided with a buckle, and the connector is clamped together with the inner wall of the telescopic ring through the buckle.

[0009] Further, the telescopic ring is provided with axially extending protrusions at intervals around the outer periphery.

[0010] Further, a sealing ring is provided between the sheath catheter and the telescopic sleeve rod.

[0011] Further, the telescopic sleeve rod is threadedly connected with the telescopic ring, and the telescopic sleeve rod and the sheath catheter are moved axially by rotating the telescopic ring; the end of the thread on the upper end of the telescopic sleeve rod is provided with a limiting buckle to limit the rotation angle of the telescopic ring.

[0012] Further, the lower end of the telescopic sleeve rod is provided with a limiting table for limiting the depth of insertion of the telescopic sleeve rod into the telescopic ring.

[0013] Compared with existing technologies, the present invention offers the following advantages: the endoscope sheath is adjustable in length, converting the rotational motion of the telescopic ring into axial movement of the sheath catheter. The precise fit of the guide post and guide groove ensures accurate axial movement of the connector and sheath catheter, ensuring a clear gap between the sheath catheter and the imaging catheter. The device can be operated one-handed, simply by rotating and moving the telescopic ring to extend and retract the sheath and position it. It is convenient and reliable to operate, and easy to assemble and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of the endoscope sheath provided by the present invention (extended to its shortest position);

[0015] Figure 2 The diagram of the endoscope sheath provided by the utility model in use (extended to the longest):

[0016] Figure 3 This is a schematic diagram of the exterior of the endoscope sheath provided by the present invention;

[0017] Figure 4 A schematic diagram of the structure of the connector provided by the present invention;

[0018] Figure 5 A schematic diagram of the structure of the telescopic sleeve provided by the utility model;

[0019] Among them: joint 1, telescopic ring 2, telescopic sleeve rod 3, mirror sheath guide tube 4, guide column 5, guide column matching groove 6, buckle 7, sealing ring 8, limit card 9, protrusion 10. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-5 As shown, this embodiment provides an endoscope sheath, comprising a joint 1, a telescopic ring 2, a telescopic sleeve 3 and a sheath catheter 4. The lower end of the joint 1 is detachably connected to the telescopic ring 2; the telescopic ring 2 is open at both ends and has a cylindrical cavity inside.

[0022] The telescopic sleeve 3 is inserted into the telescopic ring 2 and is rotatably connected to the telescopic ring 2;

[0023] The joint 1 and the telescopic sleeve rod 3 are both provided with an axial through hole, the sheath guide tube 4 is inserted into the telescopic sleeve rod 3 after passing through the joint 1; the joint 1 and the sheath guide tube 4 can be an integral structure, which is made into an integral piece by injection molding, bonding or other ways;

[0024] The joint 1 is provided with an axially extending guide column 5 at the lower end, and the telescopic sleeve rod 3 is provided with a guide column matching groove 6 matched with the guide column 5; the guide column 5 is generally two, arranged on the two sides of the telescopic sleeve rod 3 in the radial direction, and can be in the form of a cylinder or a cuboid; the guide column 5 is an integral structure or a fixed connection structure with the joint 1, which prevents the joint 1 from moving axially and radially, and prevents the joint 1 from rotating relative to the telescopic sleeve rod 3; the guide column matching groove 6 is a blind hole, and its depth needs to meet the condition that when the sheath is stretched to the longest position (for example Figure 2 ), a part of the guide column 5 is still inserted into the guide column matching groove 6.

[0025] In another embodiment of the present application, the joint 1 is provided with buckles 7 at the lower end, and the buckles 7 are uniformly distributed in the circumferential direction; the telescopic ring 2 is extended inward at the top to form a limiting ring; the buckles 7 deform and pass through the limiting ring and then restore their shape to clamp the inner wall of the limiting ring; the buckles 7 are an integral structure or a fixed connection structure with the joint 1; as a preferred scheme of the present embodiment, the telescopic ring 2 is provided with protrusions 10 extending in the axial direction at intervals on the outer periphery, which facilitates the rotation of the telescopic ring 2 by the user.

[0026] In another embodiment of the present application, a sealing ring 8 is arranged between the sheath guide tube 4 and the telescopic sleeve rod 3 to seal and prevent liquid from flowing in.

[0027] In another embodiment of the present application, the telescopic sleeve rod 3 and the telescopic ring 2 are connected by threads, that is, the telescopic sleeve rod 3 has threads (limited threads, multi-threaded, reducing the rotation angle) on at least the upper and lower ends, which are matched and connected with the internal threads on the telescopic ring 2; the number and position of the threads on the telescopic sleeve rod 3 can be set according to actual needs; the telescopic sleeve rod 3 is rotated to drive the sheath guide tube 4 to move axially;

[0028] The threads on the upper end of the telescopic sleeve rod 3 are provided with limiting clamps 9 (for reference Figure 5 ) to limit the rotation angle of the telescopic ring 3; in the present embodiment, the limiting clamps 9 allow the telescopic ring 3 to be screwed in but not out; when the telescopic ring 2 is screwed in, the limiting clamps 9 are compressed and deformed, allowing the telescopic ring 3 to be normally screwed in; but when the telescopic ring 3 is screwed out, the threaded end is screwed to the position of the limiting clamps 9, which cannot be rotated any more, thereby limiting the axial and radial relative movement of the joint 1 and the telescopic ring 2, but allowing relative rotation.

[0029] In use, first, the telescopic ring 2 is installed on the telescopic sleeve rod 3 (the telescopic ring can be screwed from the upper end of the telescopic sleeve rod), then the guide column 5 on the joint assembly (the sheath guide tube 4, the joint 1, the buckle 7, the guide column 5) is inserted into the corresponding guide column matching groove 6 of the telescopic sleeve rod 3, the buckle 7 is inserted into the telescopic ring 2 along the guided direction, and then the assembled sheath is installed on the endoscope for use.

[0030] The telescopic ring 2 is rotated to be unlocked, and then is axially moved to the other end, and is positioned and locked by rotating the telescopic ring 2. The upper part of the telescopic sleeve rod 3 is limited by the limiting card 9, and the limiting card 9 limits the rotation limit position of the telescopic ring 2. The root of the telescopic sleeve rod 3 is limited by the limiting table 11, and the limiting table 11 limits the limit position of the other end of the telescopic ring. The axial movement of the telescopic ring 2 drives the axial movement of the joint 1. The joint 1 has at least one guide column 5, which is installed in the guide column matching groove 6 on the telescopic sleeve rod 3, so that the joint 1 only moves axially with the telescopic ring 2. When the telescopic ring 2 cooperates with the telescopic sleeve rod 3 at the root of the sleeve rod, it is the shortest position of the sheath. When the telescopic ring 2 cooperates with the telescopic sleeve rod 3 at the top of the telescopic sleeve rod 3, it is the longest position of the sheath.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An endoscope sheath, characterized by: The utility model relates to a telescopic lens sheath device, including joint (1), telescopic ring (2), telescopic sleeve rod (3) and mirror sheath guide pipe (4), the lower end of joint (1) is detachably connected with telescopic ring (2); The telescopic sleeve rod (3) is inserted into the telescopic ring (2) and is rotatably connected with the telescopic ring (2); The mirror sheath guide pipe (4) is inserted into the telescopic sleeve rod (3) after passing through the joint (1); the mirror sheath guide pipe (4) is fixedly connected with the joint (1); The lower end of the joint (1) is provided with an axially extending guide column (5), and the telescopic sleeve rod (3) is provided with a guide column matching groove (6) matched with the guide column (5).

2. The endoscope sheath of claim 1, wherein: The lower end of the joint (1) is provided with a buckle (7), and the joint (1) is clamped together with the inner wall of the telescopic ring (2) through the buckle (7).

3. The endoscope sheath of claim 2, wherein: The telescopic ring (2) is provided with a protrusion (10) extending along the axis at intervals on the outer periphery.

4. The endoscope sheath of claim 1, wherein: The mirror sheath guide pipe (4) and the telescopic sleeve rod (3) are provided with a sealing ring (8) therebetween.

5. The endoscopic sheath of claim 1, wherein: The telescopic sleeve rod (3) is threadedly connected with the telescopic ring (2), the telescopic sleeve rod (3) and the mirror sheath guide pipe (4) are moved along the axis by rotating the telescopic ring (2); the end of the thread on the upper end of the telescopic sleeve rod (3) is provided with a limiting buckle (9), and the rotating angle of the telescopic ring (2) is limited.

6. The endoscope sheath of claim 1 or 5, wherein: The lower end of the telescopic sleeve rod (3) is provided with a limiting table (11) for limiting the depth of the telescopic sleeve rod (3) inserted into the telescopic ring (2).

Images