Flexible arthroscope

Abstract

The utility model discloses a flexible joint lens which comprises a handle part, a lens sheath and a flexible lens, the lens sheath is connected with the handle part, the flexible lens is arranged in the handle part and the lens sheath in a penetrating mode, and a traction wheel used for driving the flexible lens to move in the lens sheath and the handle part under the action of external force is arranged on the handle part. The handle part is also provided with a locking mechanism for locking and fixing the position of the soft lens in the lens sheath and the handle part; the traction wheel is arranged on the handle portion in a pivoted mode, the traction wheel is a gear, and a hole, used for being connected with the traction wheel in a pivoted mode, in the handle portion is a vertical kidney-shaped hole. According to the flexible arthroscope, the length of the flexible arthroscope in an articular cavity can be flexibly controlled, the front end of the flexible arthroscope can reliably move to a focus position, and the flexible arthroscope is matched with a locking mechanism, so that the position of the flexible arthroscope can be fixed, surgical operation is facilitated, and focuses at different positions can be observed.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to an endoscope. Background Art

[0002] Arthroscopy is a rod-shaped optical instrument for observing the internal structure of joints. It is an endoscope used for diagnosing and treating joint diseases. The end of a thin tube is equipped with a lens. When the thin tube is inserted into the joint, the internal structure of the joint will be displayed on the monitor, and the internal structure of the joint can be directly observed, making it easy to locate the joint during the operation and to check the operation status at any time. However, after the arthroscopy is manufactured, the viewing angle is fixed and the observation range is small. During the operation, due to the special anatomical morphology, it is difficult to observe fully. It is necessary to make multiple observation access channels, adjust the observation position of the arthroscopy, or replace the arthroscopy with different observation angles. This will not only prolong the operation time, but also increase the incidence of cross infection due to the replacement of the arthroscopy.

[0003] The soft endoscope and the sheath are combined into an arthroscope, whose front end (observation end) can be bent, the bending angle can be 0-275 degrees, and the viewing angle can be adjusted, which allows the operator to observe the situation in the joint cavity more easily and comprehensively, and improve the accuracy of surgical operations. However, the arthroscope in the existing technology cannot easily achieve axial adjustment of the soft endoscope, and can only observe the situation of a certain lesion in an all-round way. For lesions in multiple different locations, the arthroscope still needs to be replaced, and there are still problems such as long operation time and high risk of infection. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies and defects mentioned in the above background technology and provide an arthroscope whose axial length is easy to adjust.

[0005] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0006] A soft arthroscope comprises a handle portion, a scope sheath and a soft scope, wherein the scope sheath and the handle portion are connected, the soft scope is inserted into the handle portion and the scope sheath, the handle portion is provided with a traction wheel for driving the soft scope to move along its own axial direction in the scope sheath and the handle portion under the action of an external force, and the handle portion is also provided with a locking mechanism for locking and fixing the position of the soft scope in the scope sheath and the handle portion; the traction wheel is pivotally connected to the handle portion, the traction wheel is a gear, and the hole on the handle portion for pivoting the traction wheel is a vertical waist-shaped hole.

[0007] In the above-mentioned arthroscope, the vertical waist-shaped hole provides conditions for the up and down movement of the traction wheel. When the soft mirror needs to be moved, the traction wheel is pressed downward, and the traction wheel is in direct contact with the soft mirror. When a rotational force is applied to the traction wheel, the traction wheel will drive the soft mirror to move along the mirror sheath, thereby changing the length of the soft mirror in the mirror sheath to meet the needs of observing lesions in different positions. The above-mentioned traction wheel should be partially located outside the handle for easy operation. We found in practice that the traction wheel is a gear, and the part in direct contact with the soft mirror has a high friction on the surface, and the friction coefficient between the two is between 0.1 and 2.5, which can easily adjust the length of the soft mirror. In order to further facilitate the movement of the soft mirror by the traction wheel, measures to increase the friction coefficient can be taken at the corresponding part of the soft mirror, such as setting a circle of thin sleeves on some soft mirror segments that cooperate with the traction wheel, and the sleeves are made of high friction materials, such as styrene-butadiene rubber sleeves, or grinding the soft mirror segments to increase friction, or coating the soft mirror surface with a high friction coating to increase friction, such as sandblasting.

[0008] In the above-mentioned arthroscope, preferably, the locking mechanism includes an elastic pressure block that can be forced to move downward to be pressed on the soft mirror and can automatically reset upward. The locking mechanism also includes a limit block for limiting the upward reset of the elastic pressure block, and the limit block and the elastic pressure block are arranged adjacent to each other. When the elastic pressure block is forced downward, it will move downward and press against the surface of the soft mirror, exerting pressure on the soft mirror. The soft mirror is in direct contact with the high-friction gasket to prevent the soft mirror from moving, thereby achieving the position fixation of the soft mirror. In order to prevent the elastic pressure block from automatically resetting upward, it is limited by setting a limit block. By adopting the elastic pressure block and the limit block, the axial position of the soft mirror can be fixed.

[0009] In the above-mentioned arthroscope, preferably, one side of the elastic pressure block is pivotally connected to the handle portion, and the other side surface of the elastic pressure block is provided with a ratchet, and the limit block is provided with a latch for cooperating with the ratchet. Through the cooperation of the ratchet and the latch, the elastic pressure block can be used to lock or release the soft mirror. In the specific scheme, the latch can clamp the ratchet, allowing the ratchet to move downward, but not allowing the ratchet to move upward, so that the elastic pressure block can be pressed downward to achieve the locking of the soft mirror. At this time, the soft mirror cannot move freely along the mirror sheath and the handle portion, which is convenient for operation. When the soft mirror needs to be released, the limit block is moved to the side away from the elastic pressure block, and the latch will release the limit on the ratchet, so that the elastic pressure block will reset upward to release the limit on the soft mirror. At this time, the soft mirror can move freely along the mirror sheath and the handle portion to flexibly control the length of the soft mirror in the joint cavity.

[0010] In the above-mentioned soft arthroscope, preferably, the lower end of the limit block is pivotally connected to the handle, and a spring is provided on a side of the limit block away from the elastic pressure block, and the limit block is connected to the handle through the spring. The use of the spring can facilitate the limit block to automatically reset after being moved, and when the limit block is in a limited state, the spring can be in a normal state, and when the limit block is in a released state, the spring can be in a compressed state.

[0011] In the above-mentioned soft arthroscope, preferably, it also includes a first gasket for increasing the friction between the soft arthroscope and the handle portion, the first gasket is arranged between the soft arthroscope and the handle portion, and the first gasket is located below the locking mechanism. The above-mentioned first gasket is a high-friction gasket, and the material of the high-friction gasket can be styrene-butadiene rubber, natural rubber, butadiene rubber, isoprene rubber, etc., and the surface has high friction. The friction coefficient between the soft arthroscope and the first gasket can be between 0.3 and 0.6, so as to increase the locking and fixing effect of the locking mechanism.

[0012] In the above-mentioned soft arthroscope, preferably, it also includes a second gasket for reducing the friction between the soft arthroscope and the handle portion, the second gasket is arranged between the soft arthroscope and the handle portion, and the second gasket is located below the traction wheel. The above-mentioned second gasket is a low-friction gasket, the material of which can be polytetrafluoroethylene plastic, nylon, fluorinated ethylene propylene, polyetheretherketone, polyoxymethylene, ultra-high molecular weight polyethylene plastic, etc., and the surface has low friction. The friction coefficient between the soft arthroscope and the gasket can be between 0.01 and 0.2. When the traction wheel is pressed, the soft arthroscope directly contacts the low-friction gasket to reduce the friction between the soft arthroscope and the handle portion, so as to facilitate the movement of the soft arthroscope.

[0013] Preferably, the above-mentioned soft arthroscope further comprises a drainage channel, the drainage channel extends outward through the handle portion, the drainage channel is connected to the scope sheath; a water inlet valve and a drainage valve are connected to the drainage channel, and the drainage valve and the water inlet valve can cooperate with each other to complete the inflow and outflow of liquid.

[0014] In the above-mentioned soft arthroscope, preferably, a sealing component for realizing a sealed connection between the sheath and the soft arthroscope is provided at one end of the sheath near the handle. The sheath and the soft arthroscope can be sealed and connected by the sealing component, and the sheath can also be connected to the handle through the sealing component. There will be no leakage and contamination during the injection and discharge of the liquid, and the liquid can be prevented from overflowing.

[0015] In the above-mentioned soft arthroscope, preferably, the lens of the soft lens is provided with an oleophobic coating. During the use of the soft lens, the surface of the lens may be contaminated with synovial membrane, fat and other tissues, resulting in unclear vision. By coating the surface of the lens with an oleophobic coating, the above phenomenon can be reduced. The use of the oleophobic coating should ensure that it does not affect the observation effect of the lens. The material of the oleophobic coating may include polytetrafluoroethylene, polyvinylidene fluoride, fluorinated ethylene propylene copolymer, etc.

[0016] The utility model provides a flexible arthroscope, a traction wheel and a locking mechanism to prevent the flexible arthroscope from being entangled and damaged by entanglement, has a long service life, and does not affect the operational flexibility of the flexible arthroscope.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The arthroscope of the utility model passes through the scope sheath axially, and the scope is guided by the scope sheath. A traction wheel is provided on the handle, and the traction wheel can rotate to drive the scope to move axially to flexibly control the length of the scope in the joint cavity. The front end of the scope can be reliably moved to the lesion position, and with the locking mechanism, the position of the scope can be fixed, which is convenient for surgical operation and can observe lesions in different positions. Combined with the flexible and bendable characteristics of the scope itself, all-round and blind-angle observation of different lesion positions in the joint can be achieved, improving the accuracy and surgical effect of arthroscope surgery, and avoiding the infection risk caused by replacing the arthroscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 Schematic diagram of the structure of the soft arthroscope in the embodiment.

[0021] Figure 2 Schematic cross-sectional view of the soft arthroscope in the embodiment.

[0022] Figure 3 It is a schematic diagram of the structure of the traction wheel and locking mechanism of the arthroscope in the embodiment.

[0023] Legend

[0024] 1. Handle; 2. Mirror sheath; 21. Sealing assembly; 3. Soft mirror; 4. Drainage channel; 5. Traction wheel; 6. Locking mechanism; 61. Elastic pressure block; 62. Limit block; 63. Spring; 7. First gasket; 8. Second gasket; 9. Drainage valve; 10. Water inlet valve. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0026] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.

[0027] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.

[0028] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0029] Example:

[0030] like Figure 1-Figure 3 As shown, the arthroscope of this embodiment includes a handle portion 1, a scope sheath 2 and a soft scope 3. The scope sheath 2 and the handle portion 1 are connected, and the soft scope 3 is inserted into the handle portion 1 and the scope sheath 2. The handle portion 1 is provided with a traction wheel 5 for driving the soft scope 3 to move along its own axial direction in the scope sheath 2 and the handle portion 1 under the action of an external force. The handle portion 1 is also provided with a locking mechanism 6 for locking and fixing the position of the soft scope 3 in the scope sheath 2 and the handle portion 1.

[0031] In this embodiment, the traction wheel 5 is pivotally connected to the handle portion 1, the traction wheel 5 is a gear, and the hole on the handle portion 1 for the traction wheel 5 to be pivotally connected is a vertical waist-shaped hole. The traction wheel 5 can move up and down in the vertical waist-shaped hole. When the soft lens 3 needs to be moved, the traction wheel 5 is pressed downward and the traction wheel 5 is toggled to achieve the movement of the soft lens 3. In this embodiment, in order to better facilitate the movement of the soft lens 3 by the traction wheel 5, measures to increase friction can be taken at the contact position between the soft lens 3 and the traction wheel 5, such as adding a sleeve.

[0032] In this embodiment, the locking mechanism 6 includes an elastic pressure block 61 that can be forced to move downward to press on the soft lens 3 and can automatically reset upward. The locking mechanism 6 also includes a limit block 62 for limiting the upward reset of the elastic pressure block 61. The limit block 62 and the elastic pressure block 61 are arranged adjacent to each other.

[0033] In this embodiment, one side of the elastic pressing block 61 is pivotally connected to the handle portion 1, and a ratchet is provided on the other side of the elastic pressing block 61. A latching tooth for cooperating with the ratchet is provided on the limiting block 62. The latching tooth allows the ratchet to move downward, but does not allow the ratchet to move upward. Only by moving the limiting block 62 to separate the latching tooth from the ratchet can the limiting block 62 release the elastic pressing block 61.

[0034] In this embodiment, the lower end of the limit block 62 is pivotally connected to the handle portion 1 , and a spring 63 is provided on a side of the limit block 62 away from the elastic pressure block 61 , and the limit block 62 is connected to the handle portion 1 via the spring 63 .

[0035] In this embodiment, a first gasket 7 for increasing the friction between the soft lens 3 and the handle portion 1 is further included. The first gasket 7 is disposed between the soft lens 3 and the handle portion 1, and the first gasket 7 is located below the locking mechanism 6. The first gasket 7 is used to increase the friction between the soft lens 3 and the handle portion 1. In this embodiment, the first gasket 7 can be made of styrene-butadiene rubber.

[0036] In this embodiment, a second gasket 8 for reducing the friction between the soft lens 3 and the handle portion 1 is further included. The second gasket 8 is disposed between the soft lens 3 and the handle portion 1, and the second gasket 8 is located below the traction wheel 5. The second gasket 8 is used to reduce the friction between the soft lens 3 and the handle portion 1, so as to facilitate the movement of the soft lens 3 through the traction wheel 5. In this embodiment, the second gasket 8 can be a polytetrafluoroethylene gasket.

[0037] In this embodiment, a drainage channel 4 is further included, the drainage channel 4 extends outward through the handle portion 1, and the drainage channel 4 is connected to the mirror sheath 2; a water inlet valve 10 and a drainage valve 9 are connected to the drainage channel 4. Specifically, in this embodiment, the drainage valve 9 can be located at an end away from the mirror sheath 2, and the water inlet valve 10 can be located at the connection between the mirror sheath 2 and the handle portion 1.

[0038] In this embodiment, a sealing component 21 for achieving a sealed connection between the mirror sheath 2 and the soft mirror 3 is provided at one end of the mirror sheath 2 close to the handle portion 1 , and a sealed connection between the mirror sheath 2 and the handle portion 1 can also be achieved through the sealing component 21 .

[0039] In this embodiment, the lens of the soft lens 3 is provided with an oleophobic coating. In this embodiment, the oleophobic coating can be an ultra-thin fluorinated ethylene propylene copolymer oleophobic coating, which can prevent contamination during use and affect image quality.

[0040] In the arthroscope of this embodiment, the soft endoscope 3 passes through the scope sheath 2 along the axial direction, and the scope sheath 2 is used to guide the soft endoscope 3. The front end of the soft endoscope 3 can be reliably moved to the lesion position. The front end of the soft endoscope 3 is a bendable bending portion, and the front end bending portion is bent to a corresponding angle to observe the corresponding position, which is convenient to use. The specific adjustment method is the existing technology. A traction wheel 5 is provided on the handle portion 1, and the traction wheel 5 can rotate. When the traction wheel 5 is pressed and rotated, the soft endoscope 3 directly contacts the second gasket 8, thereby driving the soft endoscope 3 to move along the axial direction to flexibly control the length of the soft endoscope 3 in the joint cavity.

[0041] When in use, the soft endoscope 3 is moved axially by operating the traction wheel 5 to flexibly control the length of the soft endoscope 3 in the joint cavity, thereby moving the front end of the soft endoscope 3 to different lesion locations, avoiding the increase in the incidence of cross-infection among patients due to replacement of different arthroscopes. Combined with the ability of the endoscope sheath 2 to externally control the rotation angle along the axis (0-360°) and the bending angle of the bending part of the soft endoscope 3 (at least 0-180°), the exploration of multiple lesions in the entire joint without blind spots can be achieved, which is easy to use, shortens the operation time and increases efficiency.

[0042] This embodiment also uses the locking mechanism 6 to fix and release the soft mirror 3. Specifically, when the elastic pressing block 61 is pressed, the ratchet teeth of the elastic pressing block 61 are locked with the latch teeth of the limit block 62, and pressure is applied to the soft mirror 3, so that the soft mirror 3 is in direct contact with the second gasket 8, and the soft mirror 3 is fixed. When the locking mechanism 6 is in the locked state, the limit block 62 is moved, the spring 63 contracts, the latch teeth release the limit on the ratchet teeth, the elastic pressing block 61 is reset, and the soft mirror 3 is released and can move along the mirror sheath 2.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soft arthroscope, comprising a handle portion (1), a scope sheath (2) and a soft scope (3), wherein the scope sheath (2) and the handle portion (1) are connected, and the soft scope (3) is inserted into the handle portion (1) and the scope sheath (2), characterized in that: The handle portion (1) is provided with a traction wheel (5) for driving the soft mirror (3) to move along its own axis in the mirror sheath (2) and the handle portion (1) under the action of an external force, and the handle portion (1) is also provided with a locking mechanism (6) for locking and fixing the position of the soft mirror (3) in the mirror sheath (2) and the handle portion (1); The traction wheel (5) is pivotally connected to the handle portion (1); the traction wheel (5) is a gear, and the hole on the handle portion (1) for pivotally connecting the traction wheel (5) is a vertical waist-shaped hole.

2. The soft arthroscopy according to claim 1, characterized in that: The locking mechanism (6) comprises an elastic pressing block (61) which can be forced to move downward to press on the soft mirror (3) and can automatically return to an upward position. The locking mechanism (6) also comprises a limiting block (62) for limiting the upward return of the elastic pressing block (61). The limiting block (62) and the elastic pressing block (61) are arranged adjacent to each other.

3. The soft arthroscopy according to claim 2, characterized in that: One side of the elastic pressing block (61) is pivotally connected to the handle portion (1), the other side surface of the elastic pressing block (61) is provided with a ratchet tooth, and the limiting block (62) is provided with a latching tooth for cooperating with the ratchet tooth.

4. The soft arthroscopy according to claim 2, characterized in that: The lower end of the limit block (62) is pivotally connected to the handle portion (1), and a spring (63) is provided on a side of the limit block (62) away from the elastic pressure block (61), and the limit block (62) is connected to the handle portion (1) via the spring (63).

5. The soft arthroscopy according to claim 1, characterized in that: It also comprises a first gasket (7) for increasing the friction between the soft mirror (3) and the handle portion (1), wherein the first gasket (7) is arranged between the soft mirror (3) and the handle portion (1), and the first gasket (7) is located below the locking mechanism (6).

6. The soft arthroscopy according to claim 1, characterized in that: It also comprises a second gasket (8) for reducing the friction between the soft mirror (3) and the handle portion (1), wherein the second gasket (8) is arranged between the soft mirror (3) and the handle portion (1), and the second gasket (8) is located below the traction wheel (5).

7. The soft arthroscopy according to any one of claims 1 to 6, characterized in that: It also comprises a drainage channel (4), the drainage channel (4) extending outwards through the handle portion (1), the drainage channel (4) being connected to the mirror sheath (2); a water inlet valve (10) and a drainage valve (9) are connected to the drainage channel (4).

8. The soft arthroscopy according to any one of claims 1 to 6, characterized in that: A sealing component (21) for achieving a sealed connection between the mirror sheath (2) and the soft mirror (3) is provided at one end of the mirror sheath (2) close to the handle portion (1).

9. The soft arthroscopy according to any one of claims 1 to 6, characterized in that: The lens of the soft lens (3) is provided with an oleophobic coating.

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