An external endoscopic channel that can rotate circumferentially relative to the inner channel

Abstract

This invention relates to the field of medical devices, specifically to an endoscopic external channel that can rotate circumferentially relative to an inner channel. The endoscopic external channel includes a mounting cap, a rotating cap, a pull cable, and a pull cable control device. The mounting cap is mounted on the tip of the endoscope, and the rotating cap is rotatably mounted on the mounting cap. The mounting cap and rotating cap are respectively provided with a cable connector and a cable fixing component. The pull cable is a double pull cable; the first ends of the first and second pull cables pass through the cable connector and are respectively routed around the outer wall of the mounting cap in different directions and fixed to the cable fixing component. The second ends of both pull cables are connected to the pull cable control device. The endoscopic external channel of this invention, which can rotate circumferentially relative to the inner channel, allows the pull cable control device to drive the rotating cap and the mounting cap to rotate relative to each other, forming a rotatable external channel.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to an external endoscopic channel that can rotate circumferentially relative to the inner channel. Background Technology

[0002] Gastrointestinal tumors are common clinical diseases. When removing these tumors endoscopically, problems such as poor visualization, tumors located too deep, or blind spots often arise. Therefore, it is necessary to retract the surrounding tissues to expose the lesion. Commonly used clinical methods include metal clip and wire traction techniques, metal clip and elastic coil traction techniques, and grasping forceps traction techniques.

[0003] The above methods can only achieve traction at one angle, and cannot be adjusted according to the actual surgical situation. The direction and angle of traction cannot be changed at any time, which has limitations in the surgical process and cannot fully meet the needs of clinicians.

[0004] If doctors could be provided with a device that allows for flexible control of the position of surgical instruments, adding a movable instrument channel under endoscopy, a single-channel endoscope could be transformed into a dual-channel endoscope, and the position of the outer channel could be adjusted as needed. This would eliminate the need for doctors to twist their bodies to adjust the angle of the endoscope, which would be helpful for tumor removal, surgical wound suturing, and also reduce the difficulty of the operation for doctors.

[0005] The purpose of this invention is to provide a rotatable external endoscopic channel, belonging to the field of medical devices, to solve the problem of the inability of endoscopic instrument channels to rotate. The rotatable external endoscopic channel provided by this invention offers an adjustable access device for endoscopic surgical instruments, which can reduce the difficulty of surgery, shorten operation time, and reduce surgical complications. Summary of the Invention

[0006] Based on the above analysis, the present invention proposes an endoscopic external channel that can rotate circumferentially relative to the inner channel to overcome the shortcomings of the prior art.

[0007] This invention is mainly achieved through the following technical solutions:

[0008] An endoscope outer channel that can rotate circumferentially relative to an inner channel includes a mounting cap, a rotating cap, a pull wire, and a pull wire control device. The mounting cap is mounted on the tip of the endoscope and has a wire connector. The rotating cap is rotatably mounted on the mounting cap and has a wire fixing component.

[0009] The pull cable is a double pull cable, comprising a first pull cable and a second pull cable. The first end of the first pull cable passes through a wire connector and extends in one direction around the mounting cap before connecting to a wire fixing component. The first end of the second pull cable passes through a wire connector and extends in the opposite direction around the mounting cap before connecting to the wire fixing component. Thus, the first and second pull cables, after being arranged around the mounting cap in opposite directions, are respectively fixed to the wire fixing component. The lengths of the first and second pull cables around the mounting cap are not limited; they can be less than one turn or have more turns.

[0010] The second ends of both the first and second pull wires are connected to a pull wire control device, which controls the pull wires to drive the rotating cap and the mounting cap to rotate relative to each other, forming a rotatable outer channel. In other words, the pull wire control device can move the pull wires to change their positions, thereby adjusting the relative positions of the rotating cap and the mounting cap.

[0011] The rotating cap is formed as part of the outer channel, providing the possibility for the outer channel to rotate relative to the inner channel (i.e., the endoscope and the mounting cap mounted on the tip of the endoscope) to adjust its orientation as needed. Of course, the outer channel may also include an additional connecting tube for mounting other instruments, or when other instruments need to be used in conjunction with the endoscope, the tip of the relevant instrument can be fixed to the rotating cap, thereby driving the relevant instrument to rotate around the tip of the endoscope via a pull-wire control device.

[0012] The pull cable is a double pull cable; pulling one cable rotates the rotating cap clockwise, and pulling the other cable rotates the rotating cap counterclockwise. Preferably, the pull cable is led out through the endoscope instrument channel and then housed within the pull cable control device; alternatively, an additional channel along the endoscope can be provided for the pull cable.

[0013] According to the aforementioned endoscopic outer channel that can rotate circumferentially relative to the inner channel, the cable control device includes a rotatable adjusting wheel with a cable connector on it. The cable connector is used to accommodate a cable extending from the endoscopic instrument channel. The second ends of the first and second cables are respectively wound around the cable connector in different directions. Then, the second endpoints of the first and second cables are respectively fixed to the cable connector or the endpoints of the two cables are connected together.

[0014] According to any of the above-described endoscope outer channel that can rotate circumferentially relative to the inner channel, a groove is formed between the rotating cap and the mounting cap, and two pull wires are disposed within the groove. The groove includes a gap formed between the rotating cap and the mounting cap due to their different inner and outer diameters when they are fitted together, and also includes a groove formed on the outer wall of the mounting cap when the rotating cap and the mounting cap are of different lengths.

[0015] According to any of the above-described circumferentially rotatable endoscopic outer channel relative to the inner channel, the cable control device, in addition to driving the cable to adjust the relative position of the rotating cap and the mounting cap, can also lock the position of the cable and the orientation of the rotating cap. Therefore, the cable control device further includes an adjusting wheel locking element to lock the rotation of the adjusting wheel.

[0016] According to any of the above-described circumferentially rotatable endoscopic outer channel relative to the inner channel, the cable control device further includes a fixed base, on which an adjusting wheel is rotatably mounted; the adjusting wheel locking element is a locking handle hinged to the fixed base, and the locking handle is also provided with a cam portion. When the locking handle is rotated, the cam portion contacts the adjusting wheel, pressing the adjusting wheel to prevent it from rotating, thereby locking the position of the adjusting wheel and the cable; when the locking handle is rotated in the opposite direction, its cam portion separates from the adjusting wheel, allowing the adjusting wheel to rotate bidirectionally, thereby driving the orientation of the two cable adjusting rotating caps and the connecting tube.

[0017] According to any of the above-described circumferentially rotatable endoscopic outer channel relative to the inner channel, the cable control device further includes a fixed base, on which an adjusting wheel is rotatably mounted; the fixed base is provided with a limiting groove, and the adjusting wheel is provided with limiting teeth. When the limiting teeth and the limiting groove are engaged, the adjusting wheel cannot rotate, thereby locking the position of the adjusting wheel and the two cables; when the limiting teeth and the limiting groove are disengaged, the adjusting wheel can rotate in both directions, thereby driving the two cables to adjust the orientation of the rotating caps and the connecting tube.

[0018] According to any of the above-described circumferentially rotatable endoscope outer channel relative to the inner channel, the cable control device further includes a cable tightening wheel, the adjusting wheel having an inner cavity, and the cable tightening wheel being rotatably fitted into the inner cavity; the cable connector has a through hole, the second ends of the first cable and the second cable are arranged around the cable connector and then pass through the through hole into the inner cavity of the adjusting wheel, the second ends of the two cables are directly fixed to the cable tightening wheel or wound around the cable tightening wheel in the same direction and then fixed to the cable tightening wheel.

[0019] According to any of the above-described circumferentially rotatable endoscopic outer channel relative to the inner channel, the cable control device further includes a cable tightening locking assembly to control the rotation of the cable tightening wheel relative to the adjusting wheel. The cable tightening locking assembly may have the structure of the adjusting wheel locking member as described above, thereby locking the cable tightening wheel bidirectionally. When it is necessary to adjust the tightness of the two cables, the cable tightening locking assembly is unlocked and adjusted accordingly, and then relocked after completion. Alternatively, the cable tightening locking assembly may also have a one-way locking function, that is, when it is necessary to tighten the cable in one direction, the cable tightening locking assembly can be directly operated to adjust the tightness of the two cables to tighten them; when it is necessary to loosen the cables, the cable tightening locking assembly must be operated to unlock it before the two cables can be loosened.

[0020] According to any of the above-described circumferentially rotatable endoscope outer channel relative to the inner channel, a one-way locking cable tightening wheel is provided. The cable tightening locking assembly includes a ring, and the cable tightening wheel and the ring are installed inside the adjusting wheel. The cable tightening wheel has teeth that correspond to the tooth grooves on the ring, forming a corresponding tooth groove structure. When the cable tightening wheel and the ring are in a fitted state, the cable tightening wheel can only rotate in one direction, tightening only the two cables. When the cable tightening wheel and the ring are in a separated state, the cable tightening wheel can rotate in both directions, tightening or loosening the two cables.

[0021] According to any of the above-described circumferentially rotatable endoscope outer channel relative to the inner channel, a one-way locking cable tightening wheel is provided. The cable tightening locking assembly includes a ring and a one-way bearing. The cable tightening wheel, ring, and one-way bearing are installed inside an adjusting wheel. The one-way bearing is fixed inside the adjusting wheel and positioned between the adjusting wheel and the cable tightening wheel. When the cable tightening wheel and the one-way bearing are in contact, the cable tightening wheel can only rotate in one direction, tightening only the two cables. When the cable tightening wheel and the one-way bearing are in separation, the cable tightening wheel can rotate in both directions, tightening or loosening the two cables.

[0022] According to any of the above-described endoscope outer channel that can rotate circumferentially relative to the inner channel, the wire connector is a wire hole provided on the mounting cap, the wire fixing member is a wire fixing hole provided on the rotating cap, and there are two wire fixing holes for fixing the first ends of the first pull wire and the second pull wire respectively.

[0023] According to any of the above-described circumferentially rotatable endoscopic external channel, the endoscopic external channel further includes a connecting tube, one end of which is connected to a rotating cap and the other end of which is connected to a pull-wire control device; preferably, the two ends of the connecting tube are detachably connected.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows;

[0025] (1) An additional movable external endoscopic channel is added. This invention adds an instrument channel to the endoscope, allowing two instruments to work together under the endoscope, which can reduce the difficulty of surgery and shorten the operation time;

[0026] (2) The position of the external channel can be adjusted and locked at any time. The external endoscopic channel of the present invention, which can rotate circumferentially relative to the internal channel, is adjusted and locked relative to the installation cap and the rotating cap by a control cable, so that the position of the instrument channel can be changed at will during the operation.

[0027] Other features and advantages of the invention will be set forth in the following description, and some advantages may also become apparent from the description or be learned by practicing the invention. The objects and other advantages of the invention will be realized and obtained by means of what is particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1a , Figure 1b This is a schematic diagram of the structure of an endoscope outer channel that can rotate circumferentially relative to the inner channel according to a certain embodiment (Embodiment 1) of the present invention; wherein, the mounting cap 1 and the rotating cap 2 are fitted to the tip of the endoscope, the pull-wire control device is fixed to the operating part of the endoscope, one end of the connecting tube 11 is fitted to the rotating cap 2 and the other end is fitted to the pull-wire control device, and the middle part is set along the endoscope;

[0030] Figures 2a-2c for Figure 1a A schematic diagram of the rotation of the endoscope's outer channel, which is circumferentially rotatable relative to the inner channel, in an embodiment; wherein, Figure 2a This is a diagram of the state before rotation. Figure 2b This is a schematic diagram showing how pulling the second cable 3b causes the rotating cap 2 to rotate clockwise. Figure 2c This is a schematic diagram showing how pulling the first pull line 3a causes the rotating cap 2 to rotate counterclockwise;

[0031] Figure 3 for Figure 1b A schematic diagram of the pull-wire control device in the embodiment;

[0032] Figure 4 for Figure 1a A schematic diagram of the assembly structure of the mounting cap 1, the rotating cap 2, and the two pull wires 3a and 3b in the embodiment;

[0033] Figure 5 This is a schematic diagram of the cooperation structure of the mounting cap 1, the rotating cap 2 and the two pull wires 3a and 3b in another embodiment (Embodiment 2) of the present invention;

[0034] Figure 6 For Figure 5 A schematic diagram of the pull-wire control device in the embodiment;

[0035] Figure 7 This is a schematic diagram of the pull-wire control device in another embodiment (Embodiment 3) of the present invention.

[0036] Figure label:

[0037] 1. Mounting cap, 1a. Threading hole, 2. Rotating cap, 2a. Wire fixing hole, 12. Wire groove, 3. Pull wire, 3a. First pull wire, 3b. Second pull wire, 4. Fixing base, 4a. Limiting tooth groove, 5. Adjusting wheel, 51. Pull wire connector, 5b. Limiting tooth, 6. Locking handle, 6a. Cam part, 7. Pull wire tightening wheel, 7a. Tooth, 8. Ring, 8a. Tooth groove, 9. One-way bearing, 10. Strap, 11. Connecting tube. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection of the present invention, the present invention will be described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present invention, and are merely a part of the embodiments of the present invention. The specific and direct descriptions of related structures are only for the convenience of understanding the present invention, and the specific features do not necessarily or directly limit the scope of the present invention. Conventional choices and substitutions made by those skilled in the art under the guidance of the present invention should be considered within the scope of protection of the present invention.

[0039] An endoscopic external channel that can rotate circumferentially relative to the internal channel is fitted onto the tip of the endoscope, thereby forming an external channel that can rotate relative to the tip of the endoscope to adjust its relative position. This external channel can accommodate instruments such as retractors, allowing the relative position of instruments positioned within the external channel to be adjusted as needed during endoscopic observation or surgery.

[0040] The external channel of the endoscope mainly consists of a mounting cap 1, a rotating cap 2, a pull wire 3, and a pull wire control device. The mounting cap 1 is installed on the tip of the endoscope and has a wire connector. The rotating cap 2 is rotatably mounted on the mounting cap 1. The rotating cap 2 can be fitted onto the outside or inside of the mounting cap 1 to achieve a rotatable fit between the two. Preferably, the rotating cap 2 is fitted onto the outside of the mounting cap 1. The rotating cap 2 has a wire fixing component. The wire connector and the wire fixing component can be openings that pass through the mounting cap 1 or the rotating cap 2, or they can be wire lugs provided on the mounting cap 1 or the rotating cap 2. Their purpose is to allow the pull wire 3 to pass through or be fixed, and to convert the force on the pull wire 3 into the force of rotation of the rotating cap 2 relative to the mounting cap 1 when the pull wire 3 is stretched or shortened.

[0041] The pull cord 3 is preferably a double pull cord, which is preferably led out through the instrument channel of the endoscope and placed in the pull cord control device after being led out; pulling one pull cord will cause the rotating cap 2 to rotate clockwise, and pulling the other pull cord will cause the rotating cap 2 to rotate counterclockwise. The pull cord 3 includes a first pull cord 3a and a second pull cord 3b. The first end of the first pull cord 3a passes through the wire connector and extends along the outer wall of the mounting cap 1 in one direction, such as clockwise, and connects to the wire fixing member; the first end of the second pull cord 3b passes through the wire connector and extends along the outer wall of the mounting cap in another direction (opposite to the first pull cord), such as counterclockwise, and connects to the wire fixing member. That is, the two pull wires 3a and 3b are arranged around the outer wall of the mounting cap 1 in different directions. When the rotating cap 2 rotates clockwise relative to the mounting cap 1, one pull wire extends while the other shortens; when the rotating cap 2 rotates counterclockwise relative to the mounting cap 1, the previously extended pull wire shortens while the other shortened pull wire extends. Thus, the rotation control of the rotating cap 2 can be achieved by controlling the extension or shortening of the two pull wires 3a and 3b. The number of turns of the first and second pull wires around the mounting cap 1 can be set as needed, and can be less than one turn, such as 1 / 4 or 1 / 3 turn, or more than one turn.

[0042] The second ends of both the first pull wire 3a and the second pull wire 3b are connected to a pull wire control device. The pull wire control device operates to increase or decrease the lengths of the first pull wire 3a and the second pull wire 3b accordingly, thereby driving the pull wires 3 to cause the rotating cap 2 to rotate relative to the mounting cap 1. That is, the pull wire control device can cause the first pull wire 3a to extend while the second pull wire 3b shortens, and the extension and contraction amounts of both are equal; or it can cause the first pull wire 3a to shorten while the second pull wire 3b extends, and the extension and contraction amounts of both are equal, thereby controlling the rotation of the rotating cap 2 through the pull wire control device.

[0043] In some embodiments, a groove 12 is provided between the rotating cap 2 and the mounting cap 1, and the first ends of the first pull wire 3a and the second pull wire 3b are disposed in the groove 12. The groove 12 may be formed by the gap between the rotating cap 2 and the mounting cap 1 due to the difference in their inner and outer diameters when they are fitted together, or it may be formed on the outer wall of the mounting cap 1 when the rotating cap 2 and the mounting cap 1 are of different lengths, or when the rotating cap 2 and the mounting cap 1 are fitted together, an annular groove 12 is provided on the front end face of the rotating cap 2 or the mounting cap 1, and the two pull wires are disposed in the groove 12 in different directions.

[0044] Among them, the first end of the two pull wires 3a and 3b refers to the pull wire part set in the rotating cap 2 or the mounting cap 1, and the second end refers to the pull wire part set in the pull wire control device; the lengths of the first and second ends of the pull wires are not fixed. During the process of the pull wire control device driving the pull wires to move and thus driving the rotating cap 2 to rotate, the lengths of the two ends of the pull wires will change accordingly.

[0045] In other embodiments, the pull wire control device includes a rotatable adjusting wheel 5, on which a pull wire connector 51 is provided for the two pull wires 3a and 3b to cooperate; the second ends of the first pull wire 3a and the second pull wire 3b are respectively arranged around the pull wire connector 51 in different directions, and the second endpoints of the first pull wire 3a and the second pull wire 3b are respectively fixed to the pull wire connector 51 or the two endpoints are connected together.

[0046] To enable the adjusting wheel 5 to be rotatably mounted, the cable control device also includes a fixing base 4, which is connected to the operating end of the endoscope, for example, by a strap 10; the adjusting wheel 5 is rotatably mounted on the fixing base 4.

[0047] In other embodiments, the cable control device further includes an adjustment wheel locking member that can lock the rotation of the adjustment wheel 5, thereby locking the rotation position of the adjustment wheel 5, and consequently locking the two cable 3a, 3b and the rotating cap 2, preventing the uncontrolled rotation of the adjustment wheel 5, and at the same time fixing the rotating cap 2 in the corresponding position.

[0048] In some specific embodiments, the locking element for the adjusting wheel 5 is a locking handle 6 hinged to the fixed base 4. The locking handle 6 is also provided with a cam portion 6a. When the locking handle 6 is rotated, its cam portion 6a contacts the adjusting wheel 5, squeezing the adjusting wheel 5 so that it cannot rotate relative to the fixed base 4, thereby locking the position of the adjusting wheel 5 and the pull wires 3a and 3b. When the locking handle 6 is rotated in the opposite direction, its cam portion 6a separates from the adjusting wheel 5, and the adjusting wheel 5 can rotate in both directions, thereby driving the two pull wires 3a and 3b to adjust the position of the rotating cap 2 and the connecting pipe 11.

[0049] In other specific embodiments, to lock the adjusting wheel 5, the fixed base 4 is provided with a limiting tooth groove 4a, and the adjusting wheel 5 is provided with a limiting tooth 5b; when the limiting tooth 5b and the limiting tooth groove 4a are engaged, the adjusting wheel 5 cannot rotate, thereby locking the position of the adjusting wheel 5 and the two pull lines 3a and 3b; when the limiting tooth 5b and the limiting tooth groove 4a are separated, the adjusting wheel 5 can rotate in both directions, thereby driving the two pull lines 3a and 3b to adjust the orientation of the rotating cap 2 and the connecting pipe 11.

[0050] Of course, other known existing technologies that can lock the adjusting wheel 5 are also feasible.

[0051] In some other embodiments, in order to adjust the tightness of the two pull wires 3a and 3b, the pull wire control device further includes a pull wire tightening wheel 7; the adjusting wheel 5 has an inner cavity, and the pull wire tightening wheel 7 is rotatably sleeved in the inner cavity; the pull wire connector 51 has a through hole 5a. After the first pull wire 3a and the second pull wire 3b are led out through the endoscope instrument channel, the second ends of the two pull wires 3a and 3b are arranged around the pull wire connector 51 in different directions (for example, one in a clockwise direction and the other in a counterclockwise direction), and pass through the through hole 5a into the inner cavity of the adjusting wheel 5. The second ends of the two pull wires 3a and 3b are directly fixed to the pull wire tightening wheel 7, or they are wound around the pull wire tightening wheel 7 in the same direction (i.e., both in a clockwise direction or both in a counterclockwise direction) and then fixed to the pull wire tightening wheel 7. This allows the two pull wires 3a and 3b to both lengthen or shorten when the pull wire tightening wheel 7 rotates, thereby achieving synchronous adjustment of the tightening of the two pull wires 3a and 3b. Whether the two pull wires 3a and 3b need to be wound around the pull wire tightening wheel 7 in the same way, and the number of turns, mainly depends on the length of the two pull wires 3a and 3b. Generally speaking, when the length of the two pull wires 3a and 3b is relatively long, corresponding winding is required. At the same time, the number of turns can also be less than one turn, such as 1 / 4 turn or 1 / 2 turn. In principle, the two pull wires 3a and 3b should have an appropriate length.

[0052] In a preferred embodiment, the cable control device further includes a cable tightening locking assembly to control the rotation of the cable tightening wheel 7 relative to the adjusting wheel 5.

[0053] In some specific embodiments, the cable tensioning wheel 7 is a one-way locking mechanism, and the cable control device also includes a ring 8. The cable tensioning wheel 7 and the ring 8 are installed inside the adjusting wheel 5. The cable tensioning wheel 7 has teeth 7a, which correspond to the tooth grooves 8a on the ring 8, forming a corresponding tooth groove structure. When the cable tensioning wheel 7 and the ring 8 are in contact, the cable tensioning wheel 7 can only rotate in one direction, tightening only the two cables 3a and 3b. When the cable tensioning wheel 7 and the ring 8 are separated, the cable tensioning wheel 7 can rotate in both directions, tightening or loosening the two cables 3a and 3b.

[0054] In other specific embodiments, the cable tensioning wheel 7 is a one-way locking pull cable tensioning wheel. The cable control device also includes a ring 8 and a one-way bearing 9. The cable tensioning wheel 7, the ring 8, and the one-way bearing 9 are installed inside the adjusting wheel 5. The one-way bearing 9 is fixed inside the adjusting wheel 5 and is positioned between the adjusting wheel 5 and the cable tensioning wheel 7. When the cable tensioning wheel 7 and the one-way bearing 9 are in contact, the cable tensioning wheel 7 can only rotate in one direction and can only tighten the two pull cables 3a and 3b. When the cable tensioning wheel 7 and the one-way bearing 9 are in a separated state, the cable tensioning wheel 7 can rotate in both directions and tighten or loosen the two pull cables 3a and 3b.

[0055] Of course, the aforementioned cable tightening and locking assembly can also be other known existing technologies capable of achieving one-way locking of the cable tightening wheel 7. Alternatively, a similar structure to the aforementioned cable control device that provides bidirectional locking can be used, which is also functionally feasible, differing only in the operation method.

[0056] In some embodiments, the wire connector is a wire hole 1a provided on the mounting cap 1, and the wire fixing member is a wire fixing hole 2a provided on the rotating cap 2. The wire fixing hole 2a has two holes to fix the first ends of the first pull wire 3a and the second pull wire 3b respectively.

[0057] In other embodiments, the external endoscope channel further includes a connecting tube 11, one end of which is connected to the rotating cap 2 and the other end of which is connected to the pull-wire control device; the connecting tube 11 is preferably located outside the rotating cap 2 and is detachably connected to the rotating cap 2 and the pull-wire control device.

[0058] The circumferentially rotatable external endoscope channel of the present invention mainly includes a mounting cap, a rotating cap, a pull cable, and a pull cable control device. The mounting cap is mounted on the tip of the endoscope, and the rotating cap is rotatably mounted on the mounting cap. The mounting cap and the rotating cap are respectively provided with a wire connector and a wire fixing component. The pull cable is a double pull cable; the first ends of the first and second pull cables pass through the wire connector and are respectively routed around the outer wall of the mounting cap in different directions and fixed to the wire fixing component. The second ends of both pull cables are connected to the pull cable control device. The circumferentially rotatable external endoscope channel of the present invention, controlled by the pull cable control device, drives the rotating cap and the mounting cap to rotate relative to each other, forming a rotatable external channel.

[0059] Example 1

[0060] like Figure 1a-4 As shown, an endoscopic external channel that can rotate circumferentially relative to the inner channel includes an installation cap 1, a rotating cap 2, a pull wire 3, a pull wire control device, and a connecting tube 11.

[0061] The mounting cap 1 is fitted onto the tip of the endoscope, and the rotating cap 2 is rotatably fitted over the mounting cap 1. The inner diameter of the mounting cap 1 is larger than the outer diameter of the rotating cap 2 to form a gap between them as a groove 12. Figure 4 As shown. One end of the connecting tube 11 is located outside the rotating cap 2 and connected to the rotating cap 2, and the other end is connected to the pull-wire control device, thereby providing an external channel extending from the pull-wire control device to the rotating cap 2; the connecting tube 11 is arranged along the endoscope, and its length is slightly greater than the length of the endoscope.

[0062] The pull wire 3 is a double pull wire, including a first pull wire 3a and a second pull wire 3b; wherein, the first pull wire 3a passes through the wire hole 1a on the mounting cap 1 and connects to a wire fixing hole 2a on the rotating cap 2; the second pull wire 3b passes through the wire hole 1a on the mounting cap 1, then winds around once through the wire groove 12 inside the mounting cap 1 and the rotating cap 2, and then connects to the other wire fixing hole 2a on the rotating cap 2. Figure 2a As shown. In use, pulling the second cable 3b will cause the rotating cap 2 to rotate clockwise, as... Figure 2b As shown; when the first pull wire 3a is pulled, the rotating cap 2 will rotate counterclockwise, as shown. Figure 2c As shown. This allows the tip of the connecting tube 11 to rotate to different positions relative to the endoscope tip without any movement at the endoscope tip, such as... Figure 2b , 2c As shown.

[0063] The cable control device is installed on the operating part of the endoscope and can be fixed to the operating part of the endoscope by the strap 10. The cable control device includes a fixing base 4, a cable tightening wheel 7, an adjusting wheel 5, a locking handle 6, and a ring 8. The fixing base 4 is fixed to the operating part of the endoscope by the strap 10, and the other components are directly or indirectly connected to the fixing base 4 to form the cable control device.

[0064] The adjusting wheel 5 is rotatably mounted on the fixed base 4, and the cable tightening wheel 7 is rotatably fitted inside the adjusting wheel 5. After the first ends of the first cable 3a and the second cable 3b are connected to the mounting cap 1 and the rotating cap 2 in the manner described above, the first cable 3a and the second cable 3b are led out through the endoscope instrument channel to the cable control device. The adjusting wheel 5 is provided with a cable connector 51. After the first cable 3a and the second cable 3b are led out through the endoscope instrument channel, they are wound around the cable connector 51 in different directions, pass through the hole 5a on the adjusting wheel 5, and then wound around and fixed to the cable tightening wheel 7 in the same direction. Specifically, after the first cable 3a and the second cable 3b are led out through the endoscope instrument channel, they are wound around the cable connector 51 in clockwise and counterclockwise directions, respectively, and then pass through the hole 5a on the adjusting wheel 5.

[0065] The cable tightening wheel 7 and the ring 8 are installed inside the adjusting wheel 5. The cable tightening wheel 7 has teeth 7a, which correspond to the tooth grooves 8a on the ring 8, forming a tooth groove structure. When the cable tightening wheel 7 and the ring 8 are in contact, the cable tightening wheel 7 can only rotate in one direction and can only tighten the cables 3a and 3b. When the cable tightening wheel 7 and the ring 8 are separated, the cable tightening wheel 7 can rotate in both directions, tightening or loosening the cables 3a and 3b.

[0066] The locking handle 6 is hinged to the fixed base 4. When the locking handle 6 is rotated, its cam part 6a contacts the adjusting wheel 5, squeezing the adjusting wheel 5 so that it cannot rotate, thereby locking the position of the adjusting wheel 5 and the pull wires 3a and 3b. When the locking handle 6 is rotated in the opposite direction, its cam part 6a separates from the adjusting wheel 5, and the adjusting wheel 5 can rotate in both directions, driving the pull wires 3a and 3b to adjust the position of the rotating cap 2 and the connecting pipe 11.

[0067] Example 2

[0068] like Figure 5 , Figure 6 As shown, an endoscope external channel that can rotate circumferentially relative to the internal channel mainly consists of a mounting cap 1, a rotating cap 2, a pull wire 3, a pull wire control device, and a connecting tube 11. The rotating cap 2 is rotatably fitted over the mounting cap 1, with the front end of the mounting cap 1 protruding beyond the rotating cap 2 and a wire groove 12 formed on the outer wall of the mounting cap 1. The connecting tube 11 is located outside the rotating cap 2. The pull wire 3 is a double pull wire; the first pull wire 3a passes through the wire hole 1a on the end face of the mounting cap 1 and connects directly to the rotating cap 2; the second pull wire 3b passes through the wire hole 1a on the end face of the mounting cap 1, wraps around the outside of the mounting cap 1, and then connects to the rotating cap 2. Figure 5 As shown.

[0069] The cable control device includes a fixed base 4, a cable tightening wheel 7, an adjusting wheel 5, and a ring 8. The cable tightening wheel 7 and the ring 8 are installed inside the adjusting wheel 5. The cable tightening wheel 7 has teeth 7a, which correspond to the tooth grooves 8a on the ring 8, forming a tooth groove structure. When the cable tightening wheel 7 and the ring 8 are in contact, the cable tightening wheel 7 can only rotate in one direction, tightening only the cables 3a and 3b. When the cable tightening wheel 7 and the ring 8 are separated, the cable tightening wheel 7 can rotate in both directions, tightening or loosening the cables 3a and 3b.

[0070] The fixed base 4 is provided with a limiting tooth groove 4a, and the adjusting wheel 5 is provided with a limiting tooth 5b. When the limiting tooth 5b and the limiting tooth groove 4a are engaged, the adjusting wheel 5 cannot rotate, thereby locking the position of the adjusting wheel 5 and the pull wires 3a and 3b. When the limiting tooth 5b and the limiting tooth groove 4a are separated, the adjusting wheel 5 can rotate in both directions, thereby driving the pull wires 3a and 3b to adjust the position of the rotating cap 2 and the connecting pipe 11.

[0071] The difference between this embodiment and embodiment one is that the locking handle 6 of embodiment one is replaced by the limiting tooth groove 4a and the limiting tooth 5b, and the composition of the wire groove 12 is different. Other structures are the same.

[0072] Example 3

[0073] like Figure 7As shown, an endoscopic external channel that can rotate circumferentially relative to the inner channel includes a mounting cap 1, a rotating cap 2, a pull cable 3, a connecting tube 11, and a pull cable control device. The pull cable control device includes a fixed base 4, a pull cable tightening wheel 7, an adjusting wheel 5, a ring 8, and a one-way bearing 9. The pull cable tightening wheel 7, the ring 8, and the one-way bearing 9 are installed inside the adjusting wheel 5, wherein the one-way bearing 9 is fixed inside the adjusting wheel 5 and located between the adjusting wheel 5 and the pull cable tightening wheel 7. When the pull cable tightening wheel 7 and the one-way bearing 9 are in contact, the pull cable tightening wheel 7 can only rotate in one direction, tightening the pull cable only; when the pull cable tightening wheel 7 and the one-way bearing 9 are in a separated state, the pull cable tightening wheel 7 can rotate in both directions, tightening or loosening the pull cable.

[0074] The fixed base 4 is also provided with a locking handle 6. When the locking handle 6 is rotated, its cam part 6a contacts the adjusting wheel 5, squeezing the adjusting wheel 5 so that it cannot rotate, thereby locking the position of the adjusting wheel 5 and the pull line. When the locking handle 6 is rotated in the opposite direction, its cam part 6a separates from the adjusting wheel 5, and the adjusting wheel 5 can rotate in both directions, driving the pull line to adjust the position of the rotating cap and the connecting pipe.

[0075] The only difference between this embodiment and Embodiment 1 is that the tooth 7a and tooth groove 8a in Embodiment 1 are replaced by a one-way bearing 9; the other structures are the same.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An endoscope outer channel rotatable circumferentially relative to an inner channel, comprising a mounting cap (1) mounted on the tip of an endoscope; characterized in that, The external channel of the endoscope also includes a rotating cap (2), a pull wire (3) and a pull wire control device. The mounting cap (1) is provided with a wire connector. The rotating cap (2) is rotatably mounted on the mounting cap (1). The rotating cap (2) is provided with a wire fixing component. The pull wire (3) includes a first pull wire (3a) and a second pull wire (3b). The first end of the first pull wire (3a) passes through the wire connector and extends in one direction around the mounting cap (1) to connect to the wire fixing member. The first end of the second pull wire (3b) passes through the wire connector and extends in the opposite direction to the first pull wire (3a) around the mounting cap (1) to connect to the wire fixing member. The second ends of both the first pull wire (3a) and the second pull wire (3b) are connected to the pull wire control device; The pull wire control device includes a rotatable adjustment wheel (5) and a pull wire connector (51) on the adjustment wheel (5). The second ends of the first pull wire (3a) and the second pull wire (3b) are respectively arranged around the pull wire connector (51) in different directions. The second endpoints of the first pull wire (3a) and the second pull wire (3b) are respectively fixed to the pull wire connector (51) or the endpoints of the two pull wires are connected together.

2. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 1, characterized in that, A groove (12) is provided between the rotating cap (2) and the mounting cap (1), and two pull wires are set in the groove (12).

3. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 1 or 2, characterized in that, The cable control device also includes an adjusting wheel locking element to lock the rotation of the adjusting wheel (5).

4. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 3, characterized in that, The cable control device further includes a fixed base (4), and an adjusting wheel (5) is rotatably mounted on the fixed base (4); the adjusting wheel locking component is a locking handle (6) hingedly mounted on the fixed base (4), and the locking handle (6) is provided with a cam portion (6a); rotating the locking handle (6) causes the cam portion (6a) to contact the adjusting wheel (5) to lock the adjusting wheel (5); or, The pull-wire control device also includes a fixed base (4), and an adjusting wheel (5) is rotatably mounted on the fixed base (4); the fixed base (4) is provided with a limiting tooth groove (4a), and the adjusting wheel (5) is provided with a limiting tooth (5b); the limiting tooth (5b) meshes with the limiting tooth groove (4a) to lock the adjusting wheel (5).

5. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 1 or 2, characterized in that, The cable control device also includes a cable tightening wheel (7), which is rotatably fitted into the inner cavity of the adjusting wheel (5). The cable connector (51) is provided with a through hole (5a). The second ends of the first cable (3a) and the second cable (3b) are arranged around the cable connector (51) in different directions and then pass through the through hole (5a) into the inner cavity of the adjusting wheel (5). The second ends of the two cables are directly fixed to the cable tightening wheel (7) or are wound around the cable tightening wheel (7) in the same direction and then fixed to the cable tightening wheel (7).

6. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 5, characterized in that, The cable control device further includes a cable tightening locking assembly to lock the rotation of the cable tightening wheel (7) relative to the adjusting wheel (5).

7. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 6, characterized in that, The cable tightening and locking assembly includes a ring (8), a cable tightening wheel (7), and the ring (8) are installed inside the adjusting wheel (5); the cable tightening wheel (7) has teeth (7a), and the ring (8) has corresponding tooth grooves (8a); when the cable tightening wheel (7) is in contact with the ring (8), the cable tightening wheel (7) can only rotate in one direction to tighten the two cables; when the cable tightening wheel (7) is separated from the ring (8), the cable tightening wheel (7) rotates in both directions to tighten or loosen the cables; or, The cable tightening and locking assembly includes a ring (8) and a one-way bearing (9). The cable tightening wheel (7), the ring (8) and the one-way bearing (9) are installed inside the adjusting wheel (5). The one-way bearing (9) is fixed inside the adjusting wheel (5) and is located between the adjusting wheel (5) and the cable tightening wheel (7). When the cable tightening wheel (7) is in contact with the one-way bearing (9), the cable tightening wheel (7) can only rotate in one direction to tighten the two cables. After the cable tightening wheel (7) is separated from the one-way bearing (9), the cable tightening wheel (7) can rotate in both directions to tighten or loosen the cables.

8. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 1, characterized in that, The wire connector is a wire hole (1a) provided on the mounting cap (1), and the wire fixing member is a wire fixing hole (2a) provided on the rotating cap (2). The wire fixing hole (2a) has two holes to fix the first ends of the first pull wire (3a) and the second pull wire (3b) respectively.

9. The endoscopic external channel that can rotate circumferentially relative to the inner channel according to claim 1 or 8, characterized in that, The external channel of the endoscope also includes a connecting tube (11), one end of which is connected to the rotating cap (2), and the other end is connected to the pull-wire control device.

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