CN114652367B - Spine endoscope safety working sheath capable of rapidly switching perfusion pressure - Google Patents

Abstract

The invention discloses a spine endoscope safe working sheath capable of rapidly converting perfusion pressure, which comprises a sheath tube and a conversion control component, wherein one end of the sheath tube is embedded into the conversion control component; the sheath tube comprises a water channel and a working tube channel I; working tube passageway I is used for holding the outer working tube of endoscope, and the conversion control subassembly switches on cylinder one end and is equipped with sheath pipe embedded groove including switching on the cylinder, and during sheath pipe embedded groove, it is provided with the wash port to switch on the cylinder middle part, switches on to be provided with on the cylinder and is used for controlling the sealed conversion structure that perhaps switches on of wash port, switches on the cylinder and runs through the working tube passageway II that has and I intercommunication of working tube passageway, and the other end tip outside that switches on the cylinder is equipped with the handle. According to the invention, the switching structure is arranged on the handle of the working sheath, so that a doctor in an operation can freely select and quickly switch the open/closed state of the water channel of the working sheath according to the requirement of clinical indication, namely the high pressure/low pressure state generated by perfusion pressure in the operation, and surgical instruments do not need to be additionally added or replaced, thereby reducing the difficulty of the operation.

Description

Spine endoscope safety working sheath capable of rapidly switching perfusion pressure

Technical Field

The invention relates to the technical field of medical instruments, in particular to a safe working sheath of a spinal endoscope, which can quickly switch perfusion pressure.

Background

In clinical procedures it is often necessary to provide instrument channels for medical instruments with a working sheath, which is an essential auxiliary instrument in endoscopic procedures. Traditional backbone mirror work sheath does not have the high pressure function of filling, fills when the backbone mirror high pressure is filled the high pressure state that the pressure produced and can aggravate patient's painful sense, and it has nerve injury's risk to last the high pressure, probably leads to the dura mater to break and suspend the operation when serious, need increase sealed cap or change the conversion that hand instrument realized high pressure, two kinds of states of low pressure in order to avoid the operation risk that the high pressure that lasts brought generally, complex operation increases the operation degree of difficulty. The conventional patent document CN201910726720.9 discloses a surgical endoscope with a special-shaped outer working tube and capable of high-pressure filling, which discloses a high-pressure filling function, but does not provide a structure capable of rapidly switching between high pressure and low pressure to avoid surgical risks caused by continuous high pressure. The disclosed working pipe sleeve structure and the corresponding water outlet channel structure are designed based on the outer working pipe with the ring-shaped (special-shaped) pipeline section, and are not suitable for the outer working pipe with the common circular pipeline section.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a safe working sheath of a spinal endoscope, which can quickly switch perfusion pressure. In order to achieve the purpose, the invention adopts the following technical scheme:

a spine endoscope safety working sheath capable of rapidly converting perfusion pressure comprises a sheath tube and a conversion control component, wherein one end of the sheath tube is embedded into the conversion control component; the sheath tube comprises a water channel and a working tube channel I; working tube passageway I is used for holding the outer working tube of endoscope, the conversion control subassembly is including switching on the cylinder, it is equipped with sheath pipe embedded groove to switch on cylinder one end, the sheath pipe embedding in the sheath pipe embedded groove, it is provided with the wash port to switch on the cylinder middle part, it is used for control to switch on to be provided with on the cylinder the sealed or transform structure who switches on of wash port, switch on the cylinder run through have with the working tube passageway II of I intercommunication of working tube passageway, the other end tip outside of switching on the cylinder is equipped with the handle.

Further, many arc archs are provided with to sheath pipe wall inboard, the outer work tube of endoscope inserts behind the sheath pipe, the cooperation forms the water passageway between two adjacent arc archs, the outer work tube of endoscope.

Further, the conversion structure includes the valve, the valve is the cylinder type, the valve sets up switch on the inside of cylinder, and be located sheath pipe embedded groove with between the handle, the valve axis with the sheath pipe axis is parallel, one side of valve is provided with and runs through the wash port of valve, the axis of wash port with the axis of sheath pipe is parallel, the wash port with be equipped with the small groove between the sheath pipe embedded groove for with the flowing water drainage to the wash port that comes from the water passageway, switch on the cylinder other end still be equipped with the end cover, be equipped with on the end cover with the port of working tube passageway II intercommunication and with the outlet of wash port intercommunication.

Furthermore, the conversion control assembly also comprises a through and stop knob, and the through and stop knob is arranged on one side of the through cylinder and is fixedly connected with the valve through a screw I; the surface of the conducting column body is provided with a limiting ring for preventing the through-stop knob from generating axial displacement.

Furthermore, a plurality of drain holes are formed in the conduction column body, close to and surrounding the sheath tube orifice; the conversion structure comprises a water valve, the water valve is arranged on the outer side of the conduction cylinder and is movably connected with the conduction cylinder, and a water outlet communicated with the water drain hole is formed in the water valve.

Furthermore, a U-shaped chute is arranged at one side of the drain hole close to the sheath tube, the opening of the U-shaped chute is arranged towards the direction of the drain hole, the bottom of the U-shaped chute is provided with a corner, a pin I penetrates through the water valve and is installed in the U-shaped chute and is in sliding connection with the U-shaped chute, a spring is arranged in the water valve cavity around the outside of the conduction cylinder, and a spring cover in sliding connection with the water valve is fixedly installed at the outside of the bottom of the conduction cylinder; and anti-skid grains are arranged on the outer surface of the water valve.

Furthermore, a plurality of drain holes are annularly formed in the position, close to the handle, of the conduction cylinder, a sliding groove is formed in one side, far away from the handle, of each drain hole, a sliding pin is arranged in each sliding groove, and each sliding pin is connected with each sliding groove in a sliding mode; the switching structure comprises a knob, the knob is movably sleeved outside the conduction column body, and a plurality of water outlets communicated with the water drainage holes are formed in the side wall of the knob; and the inner wall of the knob is also provided with a fixed groove movably connected with the sliding pin.

Furthermore, a knob outer ring is fixed on the outer side of the knob, and an elastic piece is arranged between the knob outer ring and the sliding pin.

Further, the conducting cylinder is a multi-step revolving body and comprises a first cylinder, a second cylinder, a third cylinder and a fourth cylinder which are sequentially connected and coaxial, the diameter of the second cylinder is larger than that of the first cylinder, the third cylinder and the fourth cylinder, sheath embedding grooves are formed in the first cylinder and the second cylinder, and a handle is arranged at the end part of the fourth cylinder; the third cylinder is provided with a drain hole which is communicated along the radial direction, and the drain hole simultaneously penetrates through the end surface of the second cylinder, which is close to the first cylinder, along the axial direction;

the conversion structure is a knob, the knob is sleeved outside the first cylinder, the second cylinder and the third cylinder, and an L-shaped water outlet communicated with the water drain hole is formed in the knob;

a sealing gasket is arranged on the end face, close to the first cylinder, of the second cylinder, a pin II penetrates through the sealing gasket and the second cylinder at the same time and limits the mutual rotation between the sealing gasket and the second cylinder, and the sealing gasket is provided with a kidney-shaped hole for water to pass through;

a conversion assembly is arranged between the knob and the third cylinder, the conversion assembly comprises a limiting pin, one end of the limiting pin is movably embedded in the end face, close to the third cylinder, of the second cylinder, a conversion groove is formed in the end face of the third cylinder, the other end of the limiting pin is embedded in a movable hole of an elastic pin guide ring, and the elastic pin guide ring is located between the knob and the third cylinder;

elastic pin guide rings are arranged on two sides of the other end of the limiting pin, an elastic pin cover plate is arranged at the end part of the limiting pin, and a sealing ring is arranged between the inner side of each elastic pin guide ring and the third cylinder;

one end of the limiting pin is a spherical surface, and a pressure spring is sleeved at the end part of the other end of the limiting pin.

Furthermore, a sealing ring A is arranged at the junction of the fourth cylinder and the working pipe channel II, and a sealing ring B is arranged between the conducting cylinder and the sheath pipe;

the outer side of the first cylinder is provided with a thread for connecting a compression ring, and the compression ring sequentially presses a friction reducing gasket, a gasket and a waveform elastic gasket on the knob.

The invention has the beneficial effects that:

1. the device has a simple structure, the water channels are positioned on two sides of the inner wall of the working sheath pipe, the risk of blocking the water channels due to blocking of one side is avoided, the water outlet quantity of the water channels can reach more than twice of the water inlet quantity through the structural arrangement, and the smooth water outlet is ensured.

2. The device has simple structure, the water channels are positioned at two sides of the inner wall of the working sheath tube, the size of the outer wall of the working sheath tube does not need to be additionally thickened, the size difference with the traditional working sheath is small, and the device can meet the basic requirements of clinical adaptation.

3. The device has simple structure, is simple and convenient in the operation implementation process, has the operation modes of axial motion, circular shaft motion and synchronization of the axial motion and the circular shaft motion for blocking the water channel, meets the operation habits of different doctors, and realizes the switching of opening and closing of the water channel to the maximum extent while being safe, reliable and simple and convenient to operate.

4. According to the device, the switching structure is arranged on the handle of the working sheath, so that a doctor in an operation can freely select and quickly switch the open/closed state of the water channel of the working sheath according to the requirement of clinical indication, namely the high pressure/low pressure state generated by perfusion pressure in the operation, surgical instruments do not need to be additionally added or replaced, and the difficulty of the operation is reduced.

Drawings

FIG. 1 is a schematic view of the working sheath and scope body assembly of the present invention;

FIG. 2 is a schematic cross-sectional view of the interior of a working sheath of the present invention;

FIG. 3 is a schematic view of the overall structure of the working sheath of the present invention (example 1);

FIG. 4 is a sectional view showing the overall structure of the working sheath of the present invention (example 1);

FIG. 5 is a schematic view of the overall structure of the working sheath of the present invention (example 2);

FIG. 6 is a sectional view showing the overall structure of the working sheath of the present invention (example 2);

FIG. 7 is a schematic view of the U-shaped chute of the working sheath of the present invention (example 2);

FIG. 8 is a schematic view of the overall structure of the working sheath of the present invention (example 3);

FIG. 9 is a partial cross-sectional view of the working sheath shift control assembly of the present invention (example 3);

FIG. 10 is a schematic view of a knob structure of a working sheath according to the present invention (example 3);

FIG. 11 is a schematic view of the overall structure of the working sheath of the present invention (example 4);

FIG. 12 is a cross-sectional view of a working sheath changing control assembly of the present invention (example 4);

FIG. 13 is a partial cross-sectional view of a first working sheath of the present invention (example 4);

FIG. 14 is a partial sectional view of a second working sheath of the present invention (example 4);

FIG. 15 is a partial sectional view of the third working sheath of the present invention (example 4);

FIG. 16 is a schematic view of the structure of a conducting column of the working sheath of the present invention (example 4);

FIG. 17 is a schematic view of a drainage hole in the conduction cylinder of the working sheath according to the present invention (example 4);

FIG. 18 is a schematic view of a knob structure of the working sheath of the present invention (example 4);

fig. 19 is a schematic view of the structure of a water discharge hole of a knob of a working sheath according to the present invention (example 4).

Fig. 20 is a schematic structural view of a working sheath conducting cylinder transition groove of the present invention (embodiment 4).

Reference numerals are as follows: 1. a sheath tube; 101. a tube wall; 102. an arc-shaped bulge; 103. a water passage; 104. an endoscope outer working tube; 2. conducting the column; 3. a drain hole; 4. an end cap; 5. a handle; 6. a small groove; 7. a water outlet; 8. a valve; 9. a pass-stop knob; 10. a seal ring; 11. a limiting ring; 12. a screw I; 13. a water valve; 14. a U-shaped chute; 141. a corner; 15. a pin I; 16. a spring; 17. a spring cover; 18. anti-skid lines; 19. an elastic member; 20. a slide pin; 22. a knob outer ring; 23. a knob; 24. a knob retainer ring; 25. fixing grooves; 26. a sliding groove; 30. a spring pin guide ring; 31. a restricting pin; 32. a sealing gasket; 33. a compression ring; 35. a friction reducing shim; 36. a gasket; 37. a wave-shaped elastic pad; 38. a pressure spring; 39. a seal ring; 40. a sealing ring A; 41. a seal ring B; 43. a decorative ring; 44. a screw II; 45. a pin II; 46. a spring pin cover plate; 50. a lens body; 51. a first column; 52. a second cylinder; 53. a third column; 54. a fourth cylinder; 55. and (4) converting the groove.

Detailed Description

The invention will be further described with reference to the accompanying drawings and the detailed description below:

as shown in fig. 1 and 2, the scope body 50 and the endoscope outer working tube 104 are integrally connected, and the endoscope outer working tube 104 is inserted into the sheath tube 1. The safe working sheath of the spinal endoscope, which can rapidly switch perfusion pressure, can realize rapid switching between a high pressure state and a low pressure state.

The invention relates to a spine endoscope safety working sheath capable of rapidly converting perfusion pressure, which comprises a sheath tube 1 and a conversion control component, wherein one end of the sheath tube 1 is embedded into the conversion control component; the sheath tube 1 comprises a water channel 103 and a working tube channel I; working tube passageway I is used for holding endoscope outer work tube 104, the conversion control subassembly is including switching on cylinder 2, it is equipped with sheath pipe embedded groove to switch on 2 one end of cylinder, 1 embedding of sheath pipe in the sheath pipe embedded groove, it is provided with wash port 3 to switch on the cylinder middle part, it is used for control to switch on being provided with on the cylinder wash port 3 sealed or with the transform structure who switches on, the cylinder 2 that switches on run through have with the working tube passageway II of I intercommunication of working tube passageway, the other end tip that switches on the cylinder is equipped with end cover 4 and handle 5. During assembly, the working tube 104 of the endoscope penetrates through the working tube channel II of the conduction cylinder 2 from the conversion control assembly, and then penetrates out of the working tube channel I in the sheath tube 1 of the sheath tube embedded groove of the conduction cylinder 2 from the assembly.

Further, as shown in fig. 2, a plurality of arc-shaped protrusions 102 are arranged on the inner side of the tube wall 101 of the sheath tube 1, and after the endoscope external working tube 104 is inserted into the sheath tube 1, a water channel 103 is formed between two adjacent arc-shaped protrusions 102 and the endoscope external working tube 104 in a matching manner. The arc-shaped protrusion 102 is used for keeping the central position of the endoscope outer working tube 104 in the sheath tube 1, the position without the arc-shaped protrusion in the tube wall 101 of the sheath tube 1 is used as the water channel 103, and the coordination of the water channel 103 and the supporting surface of the endoscope outer working tube 104 is realized by setting the proportion of the arc-shaped protrusion 102 and the water channel 103 in the sheath tube 1.

The water channels are positioned on two sides of the inner wall of the working sheath pipe, so that the water yield is more than twice of the water inflow during high-pressure pouring, the size of the outer wall of the working sheath pipe does not need to be additionally thickened, the probability of blockage of the water channels is reduced, and the smooth water outflow is ensured. The water yield can reach more than the twice of the inflow under the open state of work sheath water passageway when high pressure heavy current is filled, and high flow drainage can take away impurity and guarantee that the field of vision under the mirror is clear, fills and presses the realization operation position and be in the low pressure state, reduces the painful sense that lasts patient's production under the high pressure state and probably leads to the risk of nerve oppression. When the working sheath water channel is in a closed state, the water outlet amount is smaller than the water inlet amount to form a high-pressure state, the high-pressure state compression has a hemostatic effect, and nerve injury cannot be caused by transient compression in an operation.

The water inflow refers to the water inflow of the water inlet pipe in the endoscope outer working pipe 104 in the surgical endoscope which has a special-shaped outer working pipe and can be filled under high pressure in patent document CN 201910726720.9.

The sheath tube 1 is provided with a switching control assembly, and the switching structure can realize the rapid switching of the open and closed states of the working sheath water channel, namely the rapid switching of high pressure and low pressure during high pressure perfusion of large water flow in an operation. See the following four examples for specific technical solutions.

Example 1:

further, as shown in fig. 3 and 4, the conversion structure includes a valve 8, the valve 8 is cylindrical, the valve 8 is disposed in the middle of the conduction cylinder 2 and located between the embedded groove and the end cover 4, the axial direction of the valve 8 is parallel to the axial direction of the sheath tube 1, a drain hole 3 penetrating through the valve 8 is disposed on one side of the valve 8, the drain hole 3 in embodiment 1 is a long circular hole for draining water, the axial direction of the drain hole 3 is parallel to the axial direction of the sheath tube 1, a small groove 6 is disposed between the drain hole 3 and the sheath tube embedded groove and used for draining the running water from the water channel 103 into the drain hole 3, and a drain port 7 communicated with the drain hole 3 is disposed on the end cover 4.

Furthermore, the conversion control assembly further comprises a stop knob 9, the stop knob 9 is arranged on one side of the conduction column body 2 and is fixedly connected with the valve 8 through a screw I12, the stop knob 9 and the valve 8 can rotate synchronously, and the stop knob 9 is controlled to rotate to drive the valve 8 to rotate around the axis of the valve 8.

Furthermore, a limiting ring 11 for preventing the through-stop knob 9 from axial displacement is arranged on the through-cylinder 2.

Further, a sealing ring 10 is arranged between the side surface of the valve 8 and the inner wall of the conducting column.

The endoscope external working tube 104 penetrates from the end port of the end cover 4 and penetrates out of the sheath tube 1, when the through-stop knob 9 is toggled during high-pressure filling and drainage to enable the drain hole 3 on the valve 8 to be aligned and communicated with the drain port 7 on the end cover 4 and the small groove 6 inside the conduction cylinder 2, water flow enters the conduction cylinder 2 from the water channel 103 in the sheath tube 1 and flows out through the small groove 6, the drain hole 3 and the drain port 7 in sequence. When the drainage is not needed, the through stop knob 9 is turned so that the drainage hole 3 on the valve 8 is communicated with the drainage port 7 on the end cover and the small groove 6 in the through cylinder 2 in a non-alignment way, and the drainage is stopped.

Example 2:

as shown in fig. 5-7, the conducting cylinder 2 in this embodiment is a multi-section cylinder, the handle 5 is fixedly mounted on the outer cylindrical surface of the uppermost section, the cylindrical surface of the middle section is provided with a plurality of drainage holes 3, as shown in fig. 7, a U-shaped chute 14 is arranged below the drainage holes 3, and the sheath 1 is mounted at the last section; the water valve 13 is integrally cylindrical, one end of the water valve is provided with a plurality of water outlets 7, the outer surface of the lower end of each water outlet 7 is provided with anti-skid grains, and the pin I15 is arranged in a U-shaped groove in the outer surface of the conduction cylinder 2 and can move along the U-shaped sliding groove 14; the spring 16 is located on the end face of the inner hole of the water valve 13, the spring cover 17 is used for fixing the bottom of the spring, and the spring cover 17 is fixedly installed at one end of the conduction column body 2.

Further, a plurality of drain holes 3 are formed on the conduction cylinder 2 near and around the pipe orifice of the sheath pipe 1; the conversion structure comprises a water valve 13, the water valve 13 is arranged on the outer side of the conduction column body 2 and is movably connected with the conduction column body 2, and a water outlet 7 communicated with the water drain hole 3 is formed in the water valve 13.

Further, the U-shaped chute 14 is disposed at one side of the drainage hole 3 close to the sheath tube 1, the opening of the U-shaped chute 14 is disposed toward the drainage hole 3, a corner 141 is disposed at the bottom of the U-shaped chute 14, a pin i 15 penetrates through the water valve 13, is installed in the U-shaped chute 14, and is slidably connected to the U-shaped chute 14, a spring 16 is disposed around the outside of the conduction cylinder 2 in the cavity of the water valve 13, and a spring cover 17 slidably connected to the water valve 13 is fixedly mounted on the outside of the bottom of the conduction cylinder 2.

Further, the outer surface of the water valve 13 is provided with anti-skid threads 18.

When high-pressure perfusion and drainage are carried out in an endoscopic surgery, the initial position of the pin I15 is located at the top of one side of the U-shaped sliding groove 14, the water valve 13 is pulled downwards, the water valve 13 is rotated after the pin I15 reaches the bottom of the U-shaped sliding groove 14, the pin I15 is located at the top of the other side of the U-shaped sliding groove 14 after the pin I15 is rotated to enable the pin I15 to reach the corner of the other side of the bottom of the U-shaped sliding groove 14, the water valve 13 is loosened, the water valve 13 is bounced upwards by the spring 16, the water outlet 7 of the pin I15 is aligned with the water outlet 3 of the conducting cylinder 2, and water flow enters along the water channel 103 in the sheath tube 1 and then is discharged from the water outlet 7 of the water valve 13. When the water pressure is converted into low pressure, the water valve 13 is pulled downwards, the water valve 13 is rotated in the opposite direction after the pin I15 reaches the bottom of the U-shaped chute 14, the pin I15 is enabled to reach the corner of one side of the bottom of the U-shaped chute, the water valve 13 is loosened, the water valve 13 is bounced upwards by the spring 16, the pin I15 is located at the top of the high-pressure starting side of the U-shaped chute 14, the water outlet 7 of the water valve 13 is not aligned with the water outlet 3 of the conduction cylinder 2, and water flow is stopped.

Example 3:

as shown in fig. 8-10, a plurality of drainage holes 3 are annularly arranged at a position of the conduction cylinder 2 close to the handle 5, a sliding groove 26 is arranged at a side of the drainage hole 3 far away from the handle 5, a sliding pin 20 is arranged in the sliding groove 26, and the sliding pin 20 is slidably connected with the sliding groove 26; the conversion structure comprises a knob 23, the knob 23 is movably sleeved on the outer side of the conduction cylinder 2, and a plurality of water outlets 7 communicated with the water drain holes 3 are formed in the side wall of the knob 23; the inner wall of the knob 23 is further provided with a fixing groove 25 connected with the sliding pin 20.

Further, a knob outer ring 22 is fixed on the outer side of the knob 23, and an elastic member 19 is arranged between the knob outer ring 22 and the sliding pin. In this embodiment, the elastic member 19 is a spring. The sliding groove 26 is provided with steps at both ends with a depth greater than the depth of the middle section, when the knob 23 drives the sliding pin 20 to slide to the end of the sliding groove 26, the sliding pin 20 falls into the steps under the elastic action of the elastic member 19 to generate sound, which indicates that the knob 23 has rotated to the limit.

The whole conduction cylinder 2 in the embodiment is a two-section cylinder, the inside of the conduction cylinder is a multi-section through hole, the tail end of the conduction cylinder 2 is provided with a holding handle 5, the end of the conduction cylinder 2 close to the handle 5 is provided with a plurality of drain holes 3, and two sections of sliding grooves 26 are arranged below the drain holes 3; the knob 23 is movably sleeved outside the conduction column body 2, the side wall of the knob 23 is provided with a plurality of water outlets 7 and a fixing groove 25 for limiting the movement of the sliding pin 20, a knob outer ring 22 with anti-skid grains is fixed outside the knob 23, and the elastic piece 19 is positioned between the knob outer ring 22 and the sliding pin 20.

The knob bottom is provided with knob retaining ring 24, and knob retaining ring 24 sets up on conducting column body 2.

When high-pressure perfusion and drainage are performed in the endoscopic surgery, the knob outer ring 22 is rotated to align the drainage hole 7 on the knob 23 with the drainage hole 3 on the conduction cylinder 2, and water flows in from the sheath water channel 103 and flows out through the drainage hole 7 of the conduction cylinder 2 and the knob 23 in sequence. When the pressure is reduced, the knob outer ring 22 is rotated reversely to make the water outlet 7 on the knob 23 staggered with the water outlet 3 on the conduction column 2, and the water flow is stopped.

Example 4:

as shown in fig. 11-20, the conducting column 2 in the present embodiment is a multi-step rotator, as shown in fig. 16, the conducting column 2 includes a first column 51, a second column 52, a third column 53 and a fourth column 54 which are connected in sequence and coaxial, the diameter of the second column 52 is larger than that of the first column 51, the third column 53 and the fourth column 54, sheath embedding grooves are provided in the first column 51 and the second column 52, and a handle 5 is provided at an end of the fourth column 54; as shown in fig. 17, the third cylinder is provided with a drain hole 3 that is radially communicated, and the drain hole 3 simultaneously axially penetrates through the end surface of the second cylinder 52 close to the first cylinder 51;

further, as shown in fig. 12, the conversion structure is a knob 23, the knob 23 is sleeved outside the first cylinder 51, the second cylinder 52 and the third cylinder 53, the outer shape of the knob 23 is a multi-diameter revolving body, the outer surface with the larger diameter is provided with anti-skid grains, the outer surface with the smaller diameter is provided with a water outlet 7, and as shown in fig. 17 and 18, the knob 23 is provided with an L-shaped water outlet 7 communicated with the water outlet 3.

Further, as shown in fig. 12 and 13, a sealing gasket 32 is mounted on the end surface of the second cylinder 52 close to the first cylinder 51, a pin ii 45 penetrates through the sealing gasket 32 and the second cylinder 52 at the same time and limits the mutual rotation between the sealing gasket 32 and the second cylinder 52, the sealing gasket 32 is provided with a kidney-shaped hole for water flow to pass through, and the kidney-shaped hole is communicated with the water outlet 7 and the water discharge hole 3. The inner end surface of the knob 23 is attached to the gasket 32 and is mounted on the conductive cylinder 2.

Further, as shown in fig. 12, a switching assembly is disposed between the knob 23 and the third cylinder 53, the switching assembly includes a limiting pin 31, one end of the limiting pin 31 is slidably embedded in an end surface of the second cylinder 52 close to the third cylinder 53, a switching groove 55 is disposed in the end surface, a depth of each end of the switching groove 55 is greater than a depth of a middle section of the switching groove, the switching groove 55 is used for providing a movement range of the limiting pin 31, the other end of the limiting pin 31 is embedded in a movable hole of the spring pin guide ring 30, and the spring pin guide ring 30 is located between the knob 23 and the third cylinder 53.

Furthermore, as shown in fig. 12, two sides of the other end of the limiting pin 31 are provided with elastic pin guide rings 30, the end part is provided with an elastic pin cover plate 46, the elastic pin guide rings 30 are fixedly installed inside the knob 23, and the elastic pin guide rings 30 are provided with movable holes for limiting the movement of the limiting pin 31 and screw holes for installing screws ii 44; the elastic pin cover plate 46 is provided with a screw hole II for mounting a screw II 44, and the screw II 44 presses the elastic pin cover plate 46 on the elastic pin guide ring 30; the outside of the elastic pin cover plate 46 is covered with a decorative ring 43; a sealing ring 39 is also arranged between the inner side of the elastic pin guide ring 30 and the third column 53. The sealing ring 39 is used to prevent water from flowing out of the axial surface of the feed-through cylinder 2.

Furthermore, one end of the limiting pin 31 slidably inserted into the second column 52 is a spherical surface with a larger diameter, and the other end of the limiting pin 31 inserted into the spring pin guide ring 30 is a cylindrical body with a smaller diameter than the spherical surface for sleeving the compression spring 38. As shown in fig. 20, the two ends of the conversion groove 55 are provided with steps with a depth larger than the depth of the middle section, when the knob 23 drives the limiting pin 31 to rotate to the limit of the conversion groove 55, the limiting pin 31 falls into the steps under the action of the compression spring 38 to generate sound, which indicates that the knob 23 has rotated to the limit.

Further, a sealing ring A40 is arranged at the junction of the fourth cylinder 54 and the working pipe channel II, and a sealing ring B41 is arranged between the conduction cylinder 2 and the sheath pipe 1. The sealing ring A40 is used for matching with other tools to prevent water from flowing out from the end of the conducting column 2 where the handle 5 is arranged; a sheath tube 1 is arranged in the conduction column body 2; the sealing ring B41 is used to prevent water from flowing out from the gap between the guide cylinder 2 and the sheath 1.

Further, a thread for connecting the compression ring 33 is arranged on the outer side of the first cylinder 51, and the compression ring 33 sequentially presses the friction-reducing gasket 35, the gasket 36 and the wave-shaped elastic gasket 37 on the knob 23.

When in use, the rotation knob 23 is limited in rotation range because the limiting pin 31 can only move in the limited range of the conversion groove 55 on the conduction column 2; when the water discharging hole 3 of the conduction cylinder 2, the waist-shaped hole of the sealing gasket 32 and the water discharging hole 7 on the knob 23 are communicated by rotating, water can flow in from the conduction cylinder 2 through the water channel 103 in the sheath tube 1 and flow out from the water discharging hole 7 on the knob 23, otherwise, the water flow is cut off. The embodiment has the characteristics of stable and wide water channel, and is simple and reliable in structure.

Various other modifications and changes may occur to those skilled in the art based on the foregoing teachings and concepts, and all such modifications and changes are intended to be included within the scope of the appended claims.

Claims (3)

1. The safe working sheath of the spinal endoscope capable of quickly switching perfusion pressure is characterized by comprising a sheath tube (1) and a switching control component, wherein one end of the sheath tube (1) is embedded into the switching control component; the sheath tube (1) comprises a water channel (103) and a working tube channel I; the working pipe channel I is used for accommodating an endoscope external working pipe (104), the conversion control assembly comprises a conduction cylinder (2), one end of the conduction cylinder (2) is provided with a sheath pipe embedded groove, the sheath pipe (1) is embedded into the sheath pipe embedded groove, the middle part of the conduction cylinder (2) is provided with a drain hole (3), the conduction cylinder (2) is provided with a conversion structure for controlling the seal or conduction of the drain hole (3), a working pipe channel II communicated with the working pipe channel I penetrates through the conduction cylinder (2), and the outer side of the end part of the other end of the conduction cylinder (2) is provided with a handle (5);

the conduction cylinder (2) is a multi-step revolving body, the conduction cylinder (2) comprises a first cylinder (51), a second cylinder (52), a third cylinder (53) and a fourth cylinder (54) which are sequentially connected and coaxial, the diameter of the second cylinder (52) is larger than that of the first cylinder (51), the third cylinder (53) and the fourth cylinder (54), sheath pipe embedded grooves are formed in the first cylinder (51) and the second cylinder (52), and a handle (5) is arranged at the end part of the fourth cylinder (54); the third cylinder is provided with a drain hole (3) which is communicated along the radial direction, and the drain hole (3) simultaneously penetrates through the end face, close to the first cylinder (51), of the second cylinder (52) along the axial direction;

the conversion structure is a knob (23), the knob (23) is sleeved on the outer sides of the first cylinder (51), the second cylinder (52) and the third cylinder (53), and an L-shaped water outlet (7) communicated with the water drainage hole (3) is formed in the knob (23);

a sealing gasket (32) is mounted on the end face, close to the first cylinder (51), of the second cylinder (52), a pin II (45) penetrates through the sealing gasket (32) and the second cylinder (52) at the same time and limits the mutual rotation between the sealing gasket (32) and the second cylinder (52), and the sealing gasket (32) is provided with a kidney-shaped hole for water to pass through;

a switching assembly is arranged between the knob (23) and the third cylinder (53), the switching assembly comprises a limiting pin (31), one end of the limiting pin (31) is movably embedded in the end face, close to the third cylinder (53), of the second cylinder (52), a switching groove (55) is formed in the end face of the third cylinder (53), the other end of the limiting pin (31) is embedded in a movable hole of an elastic pin guide ring (30), and the elastic pin guide ring (30) is located between the knob (23) and the third cylinder (53);

elastic pin guide rings (30) are arranged on two sides of the other end of the limiting pin (31), an elastic pin cover plate (46) is arranged at the end part of the limiting pin, and a sealing ring (39) is arranged between the inner side of each elastic pin guide ring (30) and the third cylinder (53);

one end of the limiting pin (31) is a spherical surface, and a pressure spring (38) is sleeved at the end part of the other end of the limiting pin (31).

2. The spine endoscope safe working sheath capable of rapidly converting perfusion pressure according to claim 1, characterized in that a plurality of arc-shaped protrusions (102) are arranged on the inner side of the tube wall (101) of the sheath tube (1), and after the endoscope outer working tube (104) is inserted into the sheath tube (1), a water channel (103) is formed by the cooperation of two adjacent arc-shaped protrusions (102) and the endoscope outer working tube (104).

3. The backbone endoscope safety working sheath capable of rapidly converting perfusion pressure according to claim 1, characterized in that a sealing ring A (40) is arranged at the junction of the fourth cylinder (54) and the working tube channel II, and a sealing ring B (41) is arranged between the conducting cylinder (2) and the sheath tube (1);

the outer side of the first cylinder (51) is provided with a thread for connecting a compression ring (33), and the compression ring (33) presses a friction reducing gasket (35), a gasket (36) and a wave-shaped elastic gasket (37) on the knob (23) in sequence.

Images