Endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope which comprises a connector, a telescopic ring, a telescopic sleeve rod and an endoscope sheath catheter. The telescopic loop bar is inserted into the telescopic ring and is rotationally connected with the telescopic ring; the sheath catheter penetrates through the joint and then is inserted into the telescopic loop bar; 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. A liquid inlet is formed in the side wall of the connector and communicated with the endoscope sheath catheter. The bottom of the telescopic sleeve rod is connected with the endoscope handle shell; and an imaging catheter is inserted into the endoscope sheath catheter. The length of the endoscope is adjustable, the whole structure has sealing performance, and it is guaranteed that liquid in the endoscope sheath cavity cannot leak inwards or outwards.

Description

TECHNICAL FIELD

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

[0002] In order to avoid cross infection, reduce the time cost and risk brought by repeated disinfection, disposable endoscope sheath will be applied in clinic in large quantities. Because the sheath needs to protect the endoscope when inserting or in the body, so the length is longer than or equal to the length of endoscope catheter, and after inserting into the patient's body, the lens of endoscope needs to be exposed to get a wider field of view, at this time the length of sheath needs to be shorter than endoscope catheter. Therefore, a telescopic and convenient endoscope sheath is urgently needed.

[0003] Because the endoscope needs to inject liquid medicine or physiological saline between the sheath and the tube when in use, so the sealing property of the sheath is also particularly important, which needs to ensure that the liquid in the sheath cavity does not leak inward or outward. SUMMARY

[0004] In order to solve the above problems, an endoscope with adjustable length and good sealing property is provided.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of: an endoscope, comprising a joint, a telescopic ring, a telescopic sleeve rod and a sheath catheter, the lower end of the joint is detachably connected with the telescopic ring;

[0006] The telescopic sleeve rod is inserted into the telescopic ring and rotationally connected with the telescopic ring;

[0007] The sheath catheter is inserted into the telescopic sleeve rod after passing through the joint; the sheath catheter is fixedly connected with the joint;

[0008] The lower end of the joint 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.

[0009] The side wall of the joint is provided with a liquid inlet, and the liquid inlet is in communication with the sheath catheter;

[0010] The bottom of the telescopic sleeve rod is connected with the endoscope handle shell;

[0011] An imaging catheter is inserted into the sheath catheter.

[0012] Further, the lower end of the joint is provided with a buckle, and the joint is clamped together with the inner wall of the telescopic ring through the buckle.

[0013] Further, the telescopic ring is provided with a protrusion extending along the axial direction at intervals on the outer periphery.

[0014] Further, a first sealing ring is arranged between the sheath catheter and the telescopic sleeve rod.

[0015] Further, the telescopic sleeve rod is in threaded connection with the telescopic ring, axial movement of the telescopic sleeve rod and the sheath catheter is driven by rotating the telescopic ring, and a limit clamp is arranged at the threaded end of the upper end of the telescopic sleeve rod to limit the rotating angle of the telescopic ring.

[0016] Further, a limit platform is arranged at the lower end of the telescopic sleeve rod to limit the depth of the telescopic sleeve rod inserted into the telescopic ring.

[0017] Further, a second sealing ring is arranged between the telescopic sleeve rod and the handle shell of the endoscope.

[0018] Further, a third sealing ring is arranged between the handle shell of the endoscope and the imaging catheter.

[0019] Further, the liquid inlet is connected with a liquid inlet connector.

[0020] Compared with the prior art, the endoscope has the beneficial effects that:

[0021] The length of the endoscope can be adjusted, and the whole structure has sealing performance, so that liquid in the sheath cavity cannot leak outwards or inwards.

[0022] Single-handed operation, only rotating and moving the telescopic ring can realize telescoping and positioning of the sheath, which is convenient and reliable to operate, and is convenient for assembling and installing. The endoscope converts the rotating movement of the telescopic ring into axial movement of the sheath catheter; through precise cooperation of the guide column and the guide groove, the precision of axial movement of the connector and the sheath catheter is realized, and the gap between the sheath catheter and the imaging catheter is ensured; in order to realize the telescoping function, the relative rotation and relative movement between the sheath components, the relative rotation between the telescopic ring and the connector and the telescopic sleeve rod, and the relative movement between the connector and the telescopic sleeve rod are realized, but through the whole structure design and the method of arranging the sealing ring at the key position, the whole sheath is realized without leakage point. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure of the endoscope provided by the utility model is shown in the figure, and the telescoping is the shortest;

[0024] Figure 2 The use state of the endoscope provided by the utility model is shown in the figure, and the telescoping is the longest:

[0025] Figure 3 The external schematic view of the sheath of the endoscope provided by the utility model is shown in the figure;

[0026] Figure 4 The structure of the connector provided by the utility model is shown in the figure;

[0027] Figure 5 The structure of the telescopic sleeve rod provided by the utility model is shown in the figure;

[0028] Wherein: joint 1, telescopic ring 2, telescopic sleeve rod 3, mirror sheath catheter 4, guide column 5, guide column matching groove 6, buckle 7, first sealing ring 8, limiting buckle 9, protrusion 10, limiting table 11, liquid inlet 12, handle shell 13, imaging catheter 14, second sealing ring 15, third sealing ring 16, liquid inlet joint 17. DETAILED DESCRIPTION

[0029] As Figures 1-5 shown, the embodiment provides an endoscope, comprising joint 1, telescopic ring 2, telescopic sleeve rod 3 and mirror sheath catheter 4, the lower end of joint 1 is detachably connected with telescopic ring 2; telescopic ring 2 is open at both ends, and a cylindrical cavity is arranged inside;

[0030] Telescopic sleeve rod 3 is inserted into telescopic ring 2 and rotationally connected with telescopic ring 2;

[0031] Axial through holes are processed in joint 1 and telescopic sleeve rod 3, and mirror sheath catheter 4 is inserted into telescopic sleeve rod 3 after passing through joint 1; joint 1 and mirror sheath catheter 4 can be an integral structure, which is made into an integral piece by injection molding, bonding or the like;

[0032] The lower end of joint 1 is provided with axially extending guide column 5, and telescopic sleeve rod 3 is provided with guide column matching groove 6 matched with guide column 5; guide column 5 is generally two, which are arranged on the two sides of the diameter of telescopic sleeve rod 3 in the radial direction; guide column 5 can be in the form of a cylinder or a cuboid, and guide column 5 is an integral structure or a fixed connection structure with joint 1, which prevents joint 1 from producing radial deviation when moving axially, and prevents joint 1 from rotating relative to telescopic sleeve rod 3; guide column matching groove 6 is a blind hole, and its depth needs to meet the condition that when the mirror sheath is extended to the longest position, as Figure 2 , a part of guide column 5 is still inserted into guide column matching groove 6;

[0033] A liquid inlet 12 is formed in the side wall of joint 1 and passes through the outer wall of joint 1, the liquid inlet 12 is in communication with the mirror sheath catheter 4, and the connection mode of the liquid inlet 12 with the external liquid inlet pipe is preferably a luer connection, and meanwhile, a liquid outlet can also be formed on the joint, which is not necessary.

[0034] The bottom of telescopic sleeve rod 3 is connected with the handle shell 13 of the endoscope;

[0035] The imaging catheter 14 is inserted into the mirror sheath catheter 4.

[0036] In another embodiment of the present application, referring to Figure 1 and Figure 2 , the lower end of joint 1 is provided with buckle 7, and joint 1 is clamped together with the inner wall of telescopic ring 2 through buckle 7.

[0037] In another embodiment of the present application, referring to Figure 3The outer periphery of the telescopic ring 2 is provided with a protrusion 10 extending in the axial direction, facilitating operation.

[0038] In another embodiment of the present application, a first sealing ring 8 is arranged between the sheath guide tube 4 and the telescopic sleeve rod 3, and the sheath guide tube 4 and the telescopic sleeve rod 3 need to have axial relative movement. The first sealing ring 8 is arranged between the sheath guide tube 4 and the telescopic sleeve rod 3, so that the sheath guide tube 4 does not leak liquid when it is static or moving.

[0039] In another embodiment of the present application, the telescopic sleeve rod 3 is threadedly connected with the telescopic ring 2, and the telescopic sleeve rod 3 and the sheath guide tube 4 are moved in the axial direction 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 clamp 9, which limits the rotation angle of the telescopic ring 2.

[0040] In another embodiment of the present application, the lower end of the telescopic sleeve rod 3 is provided with a limiting platform 11, which is used to limit the depth of the telescopic sleeve rod 3 inserted into the telescopic ring 2.

[0041] In another embodiment of the present application, a second sealing ring 15 is arranged between the telescopic sleeve rod 3 and the endoscope handle shell 13, preventing liquid from leaking from this position.

[0042] In another embodiment of the present application, in the structure of the assembled endoscope, a third sealing ring 16 is arranged between the endoscope handle shell 13 and the imaging guide tube 14, so that the liquid in the liquid cavity does not leak from the connection between the imaging guide tube 14 and the shell, preventing liquid from entering the inside of the endoscope handle. The imaging guide tube 14, the sheath guide tube 4, the telescopic sleeve rod 3, the endoscope handle shell 13, the first sealing ring 8, the second sealing ring 15, and the third sealing ring 16 form a liquid cavity, and the liquid in the liquid cavity can only flow out from the gap between the front ends of the imaging guide tube 14 and the sheath guide tube 4.

[0043] In another embodiment of the present application, the liquid inlet 12 is connected with a liquid inlet connector 17.

[0044] In use, the first sealing ring 8 is first placed into the sealing groove of the telescopic sleeve rod 3, then the telescopic ring 2 is assembled onto the telescopic sleeve rod 3, and the telescopic ring can be screwed into the upper end of the telescopic sleeve rod, the connector assembly sheath guide tube 4, connector 1, buckle 7, and guide column 5 are 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 guide direction, the second sealing ring 15 is placed into the corresponding sealing groove, and the assembled sheath is mounted onto the endoscope handle shell 13 for use.

[0045] Rotating the telescopic ring 2, the telescopic ring 2 is 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 matched with the guide column 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 and the telescopic sleeve rod 3 are matched at the root of the telescopic sleeve rod 3, the mirror sheath is in the shortest position. When the telescopic ring 2 and the telescopic sleeve rod 3 are matched at the top of the telescopic sleeve rod 3, the mirror sheath is in the longest position, and the end of the mirror sheath guide tube 4 is matched with the first sealing ring 8.

[0046] Specific use process: after the preparation work before using the endoscope is completed, the assembled endoscope mirror sheath can be installed on the endoscope handle shell 13, the mirror sheath guide tube 4 is positioned in the longest position by rotating and moving the telescopic ring 2. Then the endoscope mirror sheath is inserted into the endoscope operation incision of the patient, and physiological saline is injected from the liquid inlet; the mirror sheath guide tube 4 is positioned in the shortest position by rotating and moving the telescopic ring 2, and the patient's affected area is examined through the endoscope lens end.

[0047] 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, characterized by: The utility model relates to a telescopic sleeve rod (3) and a mirror sheath catheter (4) are arranged in the telescopic ring (2), and the mirror sheath catheter (4) is inserted into the telescopic sleeve rod (3) through the joint (1). The telescopic sleeve rod (3) is inserted into the telescopic ring (2) and is rotationally connected with the telescopic ring (2). The mirror sheath catheter (4) is inserted into the telescopic sleeve rod (3) through the joint (1); the mirror sheath catheter (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). The side wall of the joint (1) is provided with a liquid inlet (12) in communication with the mirror sheath catheter (4). The bottom of the telescopic sleeve rod (3) is connected with an endoscope handle shell (13). An imaging catheter (14) is inserted into the mirror sheath catheter (4).

2. The endoscope 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 of claim 2, wherein: The telescopic ring (2) is provided with axially extending protrusions (10) at intervals around the circumference.

4. The endoscope of claim 1, wherein: A first sealing ring (8) is arranged between the mirror sheath catheter (4) and the telescopic sleeve rod (3).

5. The endoscope of claim 1, wherein: The telescopic sleeve rod (3) is threadedly connected with the telescopic ring (2), and the telescopic sleeve rod (3) and the mirror sheath catheter (4) are moved axially 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) for limiting the rotation angle of the telescopic ring (2).

6. The endoscope 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).

7. The endoscope of claim 1, wherein: A second sealing ring (15) is arranged between the telescopic sleeve rod (3) and the endoscope handle shell (13).

8. The endoscope of claim 1, wherein: A third sealing ring (16) is arranged between the endoscope handle shell (13) and the imaging catheter (14).

9. The endoscope of claim 1, wherein: The liquid inlet (12) is connected with a liquid inlet joint (17).

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