Telescopic joint endoscope sheath

Abstract

The utility model relates to the technical field of medical instruments, and provides a telescopic joint endoscope sheath which comprises an outer pipe sheath and an inner pipe sheath, the detachable inner pipe sheath is installed in the outer pipe sheath, a telescopic endoscope bridge assembly is arranged on the inner pipe sheath, and the telescopic endoscope bridge assembly comprises an endoscope bridge body, a locking sleeve, a locking block and a locking elastic piece. Compared with the prior art, when the length of the mirror bridge body needs to be adjusted to adapt to an endoscope, a user can press the locking block downwards to enable the clamping protrusion to slide out of the sliding groove and then rotate the locking block by a certain angle to enable the clamping protrusion to clamp the locking block, the clamping jaw is opened after limitation is lost, and the user can conveniently rotate the mirror bridge body to adjust the overall length of the inner tube sheath; after the proper length is reached, the locking block is rotated to enable the clamping protrusion to be aligned with the sliding groove, the clamping jaw is pressed by the locking block under the action of the locking elastic piece, and the inner pipe sheath is fixed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a retractable arthroscopic sheath. Background Technology

[0002] An endoscope is an important surgical instrument, commonly used for minimally invasive surgery or internal examinations. The endoscope sheath is a crucial accessory, protecting the endoscope from contamination during examinations and surgeries. While the length of the sheath is usually fixed, different brands of endoscopes may have variations. During use, after the endoscope is inserted into the sheath, the rear end of the endoscope must be connected and locked to the end of the endoscope bridge. Therefore, in practice, situations may arise where the front end of the endoscope is in place but the rear cannot be locked, or the rear end is locked but the front end is not yet in place. Thus, a retractable endoscope sheath is needed to accommodate endoscopes of different lengths. Utility Model Content

[0003] The purpose of this invention is to provide a retractable arthroscopic endoscope sheath, which aims to solve the problem that the length of endoscopes from different brands varies and the sheath is difficult to fit perfectly.

[0004] To achieve the above objectives, this utility model provides a retractable arthroscopic endoscope sheath, comprising an outer sheath and an inner sheath. A detachable inner sheath is installed within the outer sheath. A retractable endoscope bridge assembly is provided on the inner sheath. The retractable endoscope bridge assembly includes an endoscope bridge body, a locking sleeve, a locking block, and a locking elastic element. The endoscope bridge body is mounted on the inner sheath, with a threaded sleeve at one end of the inner sheath and a threaded hole in the endoscope bridge body that engages with the threaded sleeve. The locking sleeve is fixedly mounted on the endoscope bridge body, with a pawl at one end for clamping the inner sheath. The locking block is fitted onto the locking sleeve, with a locking ramp inside the locking block and a corresponding slope on the pawl. The locking elastic element is fitted onto the locking sleeve, with one end abutting against the endoscope bridge body and the other end abutting against the locking block. The locking sleeve has a locking protrusion near the pawl, and the locking block has a sliding groove in its inner wall that engages with the locking protrusion.

[0005] Furthermore, the outer sheath includes a sheath body and a sleeve, with the sleeve installed inside the sheath body. A locking spring is provided at the end of the sheath body away from the sleeve, and the locking spring is used to clamp the inner sheath. The locking spring includes a pressure plate and multiple sets of retaining springs, which are evenly installed on the pressure plate. Anti-detachment protrusions and fixing protrusions are provided on the retaining springs. The anti-detachment protrusions are located on the outside of the retaining springs, and the fixing protrusions are located inside the retaining springs. An inclined boss is provided inside the sheath body, and a buffer slope corresponding to the inclined boss is provided on the retaining spring.

[0006] Furthermore, a retaining sleeve is provided between the mirror sheath body and the locking spring, and a handle is provided on the retaining sleeve.

[0007] Furthermore, the sleeve has a groove at the end that contacts the sheath body, and a ring at the end that is away from the sheath body, with the inner diameter of the ring matching the outer diameter of the inner sleeve.

[0008] Furthermore, a flow divider is provided inside the pipe sleeve, which divides the inner wall of the pipe sleeve into an inlet section and an outlet section. Annular holes are provided on the ring sleeve that are connected to the inlet section and the outlet section respectively.

[0009] Furthermore, a clamping sleeve is provided on the main body of the sheath near the tube sleeve, and a clamping plate is provided on the main body of the sheath near the clamping sleeve. The clamping sleeve can press the clamping plate and thus clamp the tube sleeve. A waterproof gasket is provided between the clamping sleeve and the main body of the sheath, and a positioning gasket is provided between the tube sleeve and the main body of the sheath.

[0010] Furthermore, the sheath body is provided with a switch valve, the switch valve is provided with an L-shaped groove, the sheath body is provided with a locking protrusion, the locking protrusion can slide in the L-shaped groove, and a sealing gasket is provided between the sheath body and the switch valve; the switch valve is connected to the tube sleeve through a chamber provided in the sheath body.

[0011] Furthermore, a locking mechanism for installing an endoscope is provided at the end of the endoscope bridge body away from the locking block.

[0012] The retractable arthroscopic sheath provided by this utility model, compared with the prior art, allows the user to press down the locking block to make the latch slide out of the groove when the length of the bridge body needs to be adjusted to fit the endoscope. Then, the user can rotate the locking block at a certain angle to make the latch lock the locking block. After the restriction is removed, the latch opens, making it convenient for the user to rotate the bridge body to adjust the overall length of the inner sheath. After reaching the appropriate length, the user can rotate the locking block to align the latch with the groove. Under the action of the locking elastic element, the locking block presses the latch to fix the inner sheath. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention;

[0014] Figure 2 This is a half-sectional view of the present invention;

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a three-dimensional sectional view of the outer sheath in this utility model;

[0017] Figure 5 This is a three-dimensional sectional view of the inner sheath and telescopic mirror bridge assembly in this utility model;

[0018] Figure 6 This is a three-dimensional view of the main body of the mirror sheath in this utility model;

[0019] Figure 7 This is a cross-sectional view of the main body of the mirror sheath in this utility model;

[0020] Figure 8 This is a three-dimensional sectional view of the main body of the mirror sheath in this utility model;

[0021] Figure 9 This is a cross-sectional view of the sleeve in this utility model;

[0022] Figure 10 This is a three-dimensional view of the switch valve in this utility model;

[0023] Figure 11 This is a three-dimensional sectional view of the telescopic mirror bridge assembly in this utility model;

[0024] Figure 12 This is a front view of the inner sheath in this utility model;

[0025] Figure 13 This is a half-sectional view of the locking spring in this utility model;

[0026] Figure 14 This is a three-dimensional sectional view of the locking sleeve in this utility model;

[0027] Figure 15 This is a three-dimensional sectional view of the locking block in this utility model;

[0028] Figure 16 This is a three-dimensional sectional view of the main body of the mirror bridge in this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] in;

[0031] 1. Pipe sleeve; 10. Positioning washer; 11. Diverter plate; 12. Inlet; 13. Outlet; 14. Annular hole; 15. Ring sleeve;

[0032] 2. Inner tube sheath; 20. Threaded sleeve;

[0033] 3. Mirror sheath body; 30. Locking spring; 300. Snap ring; 301. Anti-detachment protrusion; 302. Fixing protrusion; 303. Pressure plate; 304. Buffer slope; 31. Fixing sleeve; 310. Handle; 32. Clamping sleeve; 33. Locking protrusion; 34. Sealing gasket; 35. Waterproof gasket; 36. Clamping plate; 37. Inclined boss;

[0034] 4. Telescopic mirror bridge assembly; 40. Mirror bridge body; 400. Threaded hole; 401. Locking mechanism; 41. Locking elastic element; 42. Locking block; 420. Slide groove; 421. Locking inclined surface; 43. Locking sleeve; 430. Claw; 431. Inclined surface; 432. Claw protrusion;

[0035] 5. Switch valve; 50. L-shaped groove. Detailed Implementation

[0036] The present invention will be described in detail below with reference to specific embodiments.

[0037] In this utility model, unless otherwise explicitly specified and limited, when terms such as "set in," "connected," or "linked" appear, these terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The directional terms appearing in this utility model are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the placement direction of this utility model changes, the direction of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between them in space, but only a relative limitation.

[0038] like Figures 1 to 15 As shown, this utility model provides a telescopic arthroscopic sheath, including an outer sheath and an inner sheath 2. A detachable inner sheath 2 is installed within the outer sheath. A telescopic arthroscopic bridge assembly 4 is provided on the inner sheath 2. The telescopic arthroscopic bridge assembly 4 includes a bridge body 40, a locking sleeve 43, a locking block 42, and a locking elastic element 41. The bridge body 40 is installed on the inner sheath 2. A threaded sleeve 20 is provided at one end of the inner sheath 2. A threaded hole 400 is provided in the bridge body 40, and the threaded hole 400 fits into the threaded sleeve 20. The locking sleeve 43 is fixedly installed on the bridge body 40. The locking sleeve 43 has a claw 430 at one end for clamping the inner tube sheath 2. The locking block 42 is fitted onto the locking sleeve 43. A locking ramp 421 is provided inside the locking block 42. A ramp 431 corresponding to the locking ramp 421 is provided on the claw 430. The locking elastic member 41 is fitted onto the locking sleeve 43. One end of the locking elastic member 41 abuts against the mirror bridge body 40, and the other end abuts against the locking block 42. The locking sleeve 43 has a locking protrusion 432 near the claw 430. The locking block 42 has a sliding groove 420 in its inner wall. The sliding groove 420 fits into the locking protrusion 432.

[0039] With the above design, when length adjustment is required, the user can fix the inner sheath 2 and rotate the endoscope bridge body 40 to adjust the distance between the inner sheath 2 and the endoscope bridge body 40, thereby adjusting the overall length to accommodate endoscopes of different lengths. With the help of the threaded sleeve 20 and the threaded hole 400, the user can adjust by rotation. With the cooperation of the threaded sleeve 20 and the threaded hole 400, the endoscope bridge body 40 will extend or retract a certain distance with each rotation, which makes it convenient for the user to accurately control the extension or retraction length to accommodate endoscopes of different lengths.

[0040] The pawl 430 on the locking sleeve 43 is in an extended state in its natural state, making it convenient for the user to rotate the main body of the mirror bridge 40 for adjustment. When locking is required, the locking block 42 will be pushed against the pawl 430 under the action of the locking elastic member 41. The locking ramp 421 is pressed against the ramp 431 under the action of the locking elastic member 41, causing the pawl 430 to retract inward. The retracted pawl 430 will firmly clamp the inner tube sheath 2. At this time, the main body of the mirror bridge 40 will no longer be able to rotate. When the main body 40 of the mirror bridge needs to be adjusted, the user only needs to pull the locking block 42 backward to make the latch 432 slide out of the slide groove 420, and then rotate the locking block 42 to make the latch 432 and the slide groove 420 misaligned. At this time, the latch 432 will fix the locking block 42, and the latch 430 will be in the extended state. After adjusting to the appropriate position, the user will rotate the locking block 42 to align the latch 432 and the slide groove 420. After releasing the hand, the locking block 42 will automatically pop out under the action of the locking elastic element 41, squeezing and contracting the latch 430, and fixing the main body 40 of the mirror bridge and the inner tube sheath 2.

[0041] In this embodiment, the outer sheath includes a sheath body 3 and a sleeve 1. The sleeve 1 is installed in the sheath body 3. A locking spring 30 is provided at the end of the sheath body 3 away from the sleeve 1. The locking spring 30 is used to clamp the inner sheath 2. The locking spring 30 includes a pressure plate 303 and multiple sets of retaining springs 300. The multiple sets of retaining springs 300 are evenly installed on the pressure plate 303. Anti-detachment protrusions 301 and fixing protrusions 302 are provided on the retaining springs 300. The anti-detachment protrusions 301 are provided on the outside of the retaining springs 300, and the fixing protrusions 302 are provided on the inside of the retaining springs 300. An inclined boss 37 is provided inside the sheath body 3, and a buffer slope 304 corresponding to the inclined boss 37 is provided on the retaining springs 300.

[0042] Through the above design, the locking spring 30 can restrict the inner sheath 2. When the inner sheath 2 is inserted into the mirror sheath body 3 from the outside, the inner sheath 2 can slide inward along with the locking spring 30 when it enters the mirror sheath body 3. The buffer slope 304 on the locking spring 30 sliding inward will be driven outward by the inclined protrusion 37 to unfold at a certain angle, so the inner sheath 2 can move inward at will. When it is necessary to pull the inner sheath 2 outward, the locking spring 30 will also slide outward with the inner sheath 2. However, the anti-dislodgement protrusion 301 on the locking spring 30 sliding outward will be blocked by the mirror sheath body 3. The locking spring 30, which cannot move outward, will firmly clamp the inner sheath 2, making it impossible to pull the inner sheath 2 outward. When it is necessary to pull the inner sheath 2 outward, the user can press down the pressure plate 303 to make the retaining spring 300 actively squeeze the inclined protrusion 37 to unfold outward. The inner sheath 2, which is no longer restricted, will be able to move automatically.

[0043] In this embodiment, a retaining sleeve 31 is provided between the sheath body 3 and the locking spring 30, and a handle 310 is provided on the retaining sleeve 31. The retaining sleeve 31 can be locked between the bridge body 40 and the locking spring 30 to prevent accidental contact with the locking spring 30 during actual use and thus avoid affecting normal surgery.

[0044] In this embodiment, the sleeve 1 has a groove at the end that contacts the sheath body 3, and a ring 15 at the end of the sleeve 1 away from the sheath body 3. The inner diameter of the ring 15 matches the outer diameter of the inner sheath 2. The groove is used for positioning and connection with the sheath body 3, and the ring 15 is used to fix the inner sheath 2.

[0045] In this embodiment, a diversion plate 11 is provided inside the sleeve 1, which divides the inner wall of the sleeve 1 into an inlet section 12 and an outlet section 13. An annular hole 14 is provided on the ring sleeve 15, which is connected to the inlet section 12 and the outlet section 13 respectively.

[0046] In this embodiment, a clamping sleeve 32 is provided on the sheath body 3 near the tube sleeve 1, and a clamping plate 36 is provided on the sheath body 3 near the clamping sleeve 32. The clamping sleeve 32 can press the clamping plate 36 to clamp the tube sleeve 1. A waterproof gasket 35 is provided between the clamping sleeve 32 and the sheath body 3, and a positioning gasket 10 is provided between the tube sleeve 1 and the sheath body 3.

[0047] The positioning washer 10 is used to position and install the tube sleeve 1, and it also serves as a seal. Similarly, the waterproof washer 35 also has a sealing function. When installing the tube sleeve 1, the user can first insert the positioning washer 10 and the tube sleeve 1 into the mirror sheath body 3 in sequence, and then rotate the clamping sleeve 32 to retract the clamping plate 36 to fix the tube sleeve 1. In this embodiment, the clamping sleeve 32 is threadedly connected to the mirror sheath body 3, and several handles for easy rotation are provided on the clamping sleeve 32.

[0048] In this embodiment, a switch valve 5 is provided on the sheath body 3, an L-shaped groove 50 is provided on the switch valve 5, a locking protrusion 33 is provided on the sheath body 3, the locking protrusion 33 can slide in the L-shaped groove 50, and a sealing gasket 34 is provided between the sheath body 3 and the switch valve 5; the switch valve 5 is connected to the sleeve 1 through a chamber provided in the sheath body 3.

[0049] In this embodiment, two sets of switching valves 5 are provided on the mirror sheath body 3. The two sets of switching valves 5 are evenly distributed on both sides of the mirror sheath body 3 and are used for water inlet and water outlet respectively. The chamber is provided with a water inlet chamber and a water outlet chamber, which correspond to the water inlet and water outlet switching valves 5 respectively. When the inner tube sheath 2 is inserted into the tube sleeve 1, the inner tube sheath 2 and the diverter plate 11 are pressed together to separate the water inlet part 12 and the water outlet part 13.

[0050] In this embodiment, a locking mechanism 401 for mounting the endoscope is provided at the end of the endoscope bridge body 40 away from the locking block 42. Since the locking mechanism 401 is connected to the endoscope, this structure is prior art and not an improvement of this patent, so it is not described in detail in this embodiment.

[0051] The retractable arthroscopic sheath provided by this utility model, compared with the prior art, allows the user to press down the locking block 42 to make the locking protrusion 432 slide out of the sliding groove 420 when the length of the bridge body 40 needs to be adjusted to fit the endoscope. Then, the user can rotate the locking block 42 at a certain angle to make the locking protrusion 432 lock the locking block 42. After the restriction is removed, the locking claw 430 opens, making it convenient for the user to rotate the bridge body 40 to adjust the overall length of the inner sheath 2. After reaching the appropriate length, the user can rotate the locking block 42 to align the locking protrusion 432 with the sliding groove 420. Under the action of the locking elastic member 41, the locking block 42 presses the locking claw 430 to fix the inner sheath 2.

[0052] Where there is no conflict, the above embodiments and features can be combined with each other.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A telescopic arthroscope sheath comprising an outer tube sheath and an inner tube sheath (2), characterized in that: The outer tube sheath is provided with a detachable inner tube sheath (2), and the inner tube sheath (2) is provided with a telescopic mirror bridge assembly (4), which comprises a mirror bridge main body (40), a locking sleeve (43), a locking block (42) and a locking elastic element (41). The mirror bridge main body (40) is installed on the inner tube sheath (2), and a threaded sleeve (20) is arranged at one end of the inner tube sheath (2). A threaded hole (400) is arranged in the mirror bridge main body (40) and matches the threaded sleeve (20). The locking sleeve (43) is fixedly installed on the mirror bridge main body (40), and one end of the locking sleeve (43) is provided with a clamping jaw (430) for clamping the inner tube sheath (2). The locking block (42) is sleeved on the locking sleeve (43), and a locking inclined surface (421) is arranged in the locking block (42). An inclined surface (431) corresponding to the locking inclined surface (421) is arranged on the clamping jaw (430). The locking elastic element (41) is sleeved on the locking sleeve (43), and one end of the locking elastic element (41) abuts against the mirror bridge main body (40), and the other end abuts against the locking block (42). The locking sleeve (43) is provided with a clamping convex (432) near the clamping jaw (430), and the locking block (42) is provided with a sliding groove (420) in the inner wall, which matches the clamping convex (432).

2. A telescopic endoscope sheath according to claim 1, wherein: The outer tube sheath comprises a mirror sheath main body (3) and a tube sleeve (1). The tube sleeve (1) is installed in the mirror sheath main body (3). A lock spring (30) is arranged at one end of the mirror sheath main body (3) away from the tube sleeve (1), and is used for clamping the inner tube sheath (2). The lock spring (30) comprises a pressing plate (303) and a plurality of clamping springs (300). The plurality of clamping springs (300) are uniformly installed on the pressing plate (303). A anti-loosening convex block (301) and a fixing convex block (302) are arranged on the clamping spring (300). The anti-loosening convex block (301) is arranged on the outer side of the clamping spring (300), and the fixing convex block (302) is arranged on the inner side of the clamping spring (300). An inclined convex (37) is arranged in the mirror sheath main body (3), and a buffer inclined surface (304) corresponding to the inclined convex (37) is arranged on the clamping spring (300).

3. A telescopic endoscope sheath according to claim 2, wherein: A fixed clamping sleeve (31) is arranged between the mirror sheath main body (3) and the lock spring (30), and a handle (310) is arranged on the fixed clamping sleeve (31).

4. A telescopic endoscope sheath according to claim 1, wherein: The tube sleeve (1) is provided with a clamping groove at one end in contact with the mirror sheath main body (3), and a ring sleeve (15) is arranged at one end of the tube sleeve (1) away from the mirror sheath main body (3). The inner diameter of the ring sleeve (15) matches the outer diameter of the inner tube sheath (2).

5. A telescopic endoscope sheath according to claim 4, wherein: A flow distribution plate (11) is arranged in the tube sleeve (1), which divides the inner wall of the tube sleeve (1) into a water inlet portion (12) and a water outlet portion (13). Ring-shaped holes (14) are arranged on the ring sleeve (15) and are respectively connected with the water inlet portion (12) and the water outlet portion (13).

6. A telescopic endoscope sheath according to claim 1, wherein: The mirror sheath body (3) is provided with a clamping sleeve (32) near the sleeve (1), and a clamping plate (36) is arranged on the mirror sheath body (3) near the clamping sleeve (32), the clamping sleeve (32) can press the clamping plate (36) to clamp the sleeve (1); a waterproof gasket (35) is arranged between the clamping sleeve (32) and the mirror sheath body (3), and a positioning gasket (10) is arranged between the sleeve (1) and the mirror sheath body (3).

7. A telescopic endoscope sheath according to claim 1, wherein: The mirror sheath body (3) is provided with a switch valve (5), the switch valve (5) is provided with an L-shaped groove (50), the mirror sheath body (3) is provided with a locking protrusion (33), the locking protrusion (33) can slide in the L-shaped groove (50), and a sealing gasket (34) is arranged between the mirror sheath body (3) and the switch valve (5); the switch valve (5) is communicated with the sleeve (1) through a cavity arranged in the mirror sheath body (3).

8. A telescopic endoscope sheath according to claim 1, wherein: A locking mechanism (401) for mounting an endoscope is arranged at one end of the mirror bridge body (40) away from the locking block (42).

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