Resectoscope handheld frame structure

Abstract

The invention relates to the technical field of resectoscopes, and discloses a resectoscope handheld frame structure which comprises an inner sheath and an outer sheath, the outer sheath and the inner sheath are connected through a steel ball, the outer sheath comprises an outer sheath tube and an outer sheath body, two sealing rings are installed on the inner wall of the outer sheath body, the inner sheath is in contact with the sealing rings when inserted into the outer sheath, and the outer sheath is in contact with the sealing rings when inserted into the outer sheath. The sealing ring is distributed in the circumferential direction of the outer sheath body in a bent mode, the sealing ring is divided into a plurality of sections which are connected with one another, the central axes of every two adjacent sections are not coaxial, an installation groove is formed in the inner wall of the outer sheath body, and the bent portion of the sealing ring makes contact with the inner side wall of the installation groove. According to the handheld frame, the sealing reliability and the stability of the handheld frame can be further enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of resectoscopes, and in particular to a handheld frame structure of a resectoscope. Background Art

[0002] In medical surgery, especially minimally invasive surgery, the resectoscope is an important visualization tool and is widely used in urology, gynecology and other fields. The handheld frame structure of the resectoscope includes an inner sheath and an outer sheath. These two parts together constitute one of the key components of the resectoscope and provide necessary support and guarantee for surgical operations. As part of the handheld frame, the main function of the outer sheath is to provide structural support and protect the inner sheath and internal components. The inner sheath is located inside the outer sheath and is connected to key components such as the resection operator and electrodes. The space between the inner sheath and the outer sheath allows the irrigation fluid to enter and exit, thereby maintaining a clear surgical field of view.

[0003] During the operation, the doctor controls the operation of the resectoscope through the handheld holder, including the extension and retraction of the electrode, cutting operation, etc. The close cooperation between the inner sheath and the outer sheath ensures the smooth progress of the operation and reduces the risks and complications during the operation.

[0004] At present, as described in the utility model of publication number CN206659906U, the outer sheath includes an outer sheath tube, an outer sheath body connected to the outer sheath tube, an inlet valve and an outlet valve installed on the outer sheath body, the inner sheath includes an inner sheath body and an inner sheath tube, and the rear end of the outer sheath body is provided with an outer sheath locking device, the outer sheath locking device includes a first locking ring, a steel ball, a second locking ring, a first compression spring and a second compression spring, the first compression spring is sleeved on the second locking ring and put into the outer sheath body, the steel ball is loaded into the outer sheath body joint and the steel ball is sleeved with the first locking ring, and the second compression spring is sleeved on the outer sheath body joint; the inner sheath body is provided with a steel ball groove that cooperates with the steel ball. The connection design between the outer sheath and the inner sheath is a steel ball locking method. When installing, the inner sheath is gently inserted into the outer sheath, the force is small, and the locking effect is good; when disassembling, the inner sheath can be pulled out by simply pushing the first locking ring forward, and the hand feel is light. The inner sheath main body joint is equipped with a sealing ring, and the outer sheath main body joint and the inner sheath main body joint are also sealed and connected by a sealing ring. The injection liquid flows through the inner sheath through the water inlet valve and the inner sheath liquid inlet to achieve a flushing effect. The injection liquid after flushing is discharged through the liquid outlet channel and the liquid outlet valve formed between the outer peripheral side of the inner sheath and the outer sheath.

[0005] Regarding the above-mentioned related technologies, the installation and removal of the outer sheath and the inner sheath are performed in vitro, but the outer sheath and the inner sheath are involved in the surgery after installation. Since the outer sheath and the inner sheath are connected and fixed by plugging and steel ball locking, the connection strength needs to be strengthened. Summary of the invention

[0006] In order to improve the stability of the handheld frame, the present application provides a handheld frame structure for an electroresectoscope.

[0007] The present application provides a handheld structure of an electroresectomoscope, which adopts the following technical solution: A hand-held frame structure for an electroresectoscope comprises an inner sheath and an outer sheath, wherein the outer sheath and the inner sheath are connected by steel balls, the outer sheath comprises an outer sheath tube and an outer sheath body, two sealing rings are installed on the inner wall of the outer sheath body, the inner sheath contacts the sealing rings when the inner sheath is inserted into the outer sheath, the sealing rings are bent and distributed along the circumference of the outer sheath body, the sealing rings are divided into multiple sections and connected to each other, the central axes of adjacent sections are not coaxial, an installation groove is opened on the inner wall of the outer sheath body, and the bent portion of the sealing ring contacts the inner side wall of the installation groove.

[0008] By adopting the above technical scheme, the outer sheath and the inner sheath are mainly locked by steel balls. The sealing ring is used to seal the inner sheath and the outer sheath. The bent distribution structure of the sealing ring can also increase the contact area with the inner sheath and the outer sheath, thereby increasing the elasticity and sealing performance of the sealing ring, ensuring that a stable and leak-proof sealing effect is formed when the inner sheath is inserted into the outer sheath. At the same time, the setting of the mounting groove limits the bent part of the sealing ring, further enhancing the reliability of the seal and the stability of the handheld frame.

[0009] Optionally, a guide rod is installed on the inner wall of the outer sheath body, and a plurality of guide rods are arranged at intervals along the circumferential direction of the inner wall of the outer sheath, and a space for a sealing ring to pass through is reserved between two adjacent guide rods.

[0010] By adopting the above technical solution, the sealing ring is bent and distributed, and the guide rod guides the sealing ring, so that the sealing ring is stably installed in the installation groove, and the cooperation between the guide rod and the sealing ring also enhances the overall sealing performance.

[0011] Optionally, the guide rod moves along the radial direction of the outer sheath joint, and a driving member for driving the guide rod to move is installed on the outer sheath.

[0012] By adopting the above technical solution, the radial movement of the guide rod facilitates fine-tuning of the installation space of the sealing ring when needed. If the guide rod partially leaves the sealing ring, the deformation space of the sealing ring increases. In the process of the inner sheath and the outer sheath sliding relative to each other, the deformation ability of the sealing ring is slightly improved, which is more conducive to the installation and adjustment of the inner sheath and the outer sheath. When the inner sheath and the outer sheath are locked by the steel column, the guide rod moves toward the inner sheath, thereby enhancing the squeezing force of the guide rod on the sealing ring and occupying part of the deformation space of the sealing ring, thereby making the sealing ring more stably installed in the outer sheath.

[0013] Optionally, the guide rod extends out of the outer sheath joint along the radial direction of the outer sheath joint, the driving member is a driving ring, the driving ring is sealingly and rotatably installed on the outer sheath joint, grooves are arranged in the driving ring, the grooves are spaced apart along the circumference of the driving ring, and the grooves are provided with a magnetic attraction member for attracting the guide rod.

[0014] By adopting the above technical solution, through the cooperation of the drive ring and the magnetic suction part, convenient control of the guide rod is achieved, making the operation more flexible and efficient. Specifically, if the guide rod needs to be moved slightly in the direction away from the inner sheath, the drive ring is rotated to make the groove close to the guide rod, and the guide rod is sucked into the groove by the magnetic suction part. The guide rod can also leave the groove by rotating the drive ring.

[0015] Optionally, the outer wall of the inner sheath body is provided with a slot for inserting the guide rod.

[0016] By adopting the above technical solution and setting the slot, the connection stability and sealing performance between the inner sheath and the outer sheath are further enhanced. The cooperation between the slot and the guide rod makes the inner sheath more stable when inserted into the outer sheath and not easy to fall off.

[0017] Optionally, a section of the guide rod extending into the outer sheath is a diameter-reducing section, and the outer diameter of the guide rod close to the inner sheath is the smallest.

[0018] By adopting the above technical solution and the design of the variable diameter section, the friction and resistance during the insertion process of the guide rod are reduced when the guide rod is inserted into the inner sheath. At the same time, the variable diameter section also enhances the guiding effect of the guide rod, making the inner sheath smoother during the insertion process. The contact area between the guide rod and the sealing ring is also different during the movement process. Since the guide rod has a fine-tuning effect on the deformation space of the sealing ring, the change in the deformation space of the sealing ring can be more obviously reflected when the guide rod of the variable diameter section moves.

[0019] Optionally, the groove in the driving ring is provided with two circles, and the driving ring is provided with a clearance groove for the water inlet valve to pass through.

[0020] By adopting the above technical solution, rotating the drive ring can simultaneously control the synchronous movement of two circles of guide rods. It is more convenient to operate the drive ring to control the movement path of the guide rods, and it is also more conducive to the installation and disassembly of the inner sheath and the outer sheath. The setting of the give way groove enables the water inlet valve to pass through the drive ring smoothly without affecting the compactness and functionality of the overall structure.

[0021] Optionally, the drive ring is provided with a clamping ring in the clearance groove, and the clamping ring is clamped to the pipe wall of the water inlet valve.

[0022] By adopting the above technical solution, the clamping ring cooperates with the water inlet valve tube wall, the driving ring drives the guide rod to be inserted into the slot, the driving ring does not rotate easily, and can fix the driving ring. When the guide rod needs to leave the inner sheath, the clamping ring leaves the water inlet valve tube wall.

[0023] In summary, the present application includes at least one of the following beneficial effects: 1. The sealing performance and connection stability of the resectoscope hand-held frame structure are significantly improved through the design of the bent and segmented sealing ring, the use of the matching guide rod and the slot, etc., ensuring the safety and reliability during the operation; 2. The connection stability of the handheld frame structure is further enhanced by using solutions such as a driving member to drive the guide rod to move and the cooperation between the driving ring and the magnetic suction member. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of the overall structure of an embodiment of the present application; Figure 2 yes Figure 1 A magnified schematic diagram of point A; Figure 3 is a schematic cross-sectional view of the interior of the outer sheath body of an embodiment of the present application; Figure 4 This is a schematic diagram of the structure of the embodiment of the present application showing the distribution of the guide rods along the circumferential direction of the outer sheath body; Figure 5 is a schematic diagram of the overall structure of a drive ring embodied in an embodiment of the present application; Figure 6 It is a schematic structural diagram of the clamping connection between the clamping ring of the drive ring and the pipe wall of the water inlet valve in an embodiment of the present application.

[0025] Explanation of the reference numerals: 100, outer sheath; 110, outer sheath tube; 120, outer sheath body; 121, mounting groove; 130, water inlet valve; 140, water outlet valve; 200, inner sheath; 210, inner sheath body; 211, slot; 220, inner sheath tube; 300, sealing ring; 400, guide rod; 410, reducing section; 700, driving ring; 710, groove; 720, magnetic attraction; 730, clearance groove; 740, snap ring; 741, notch. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0027] The present application embodiment discloses a handheld structure of a resectoscope. Figure 1 and Figure 2A hand-held frame structure of an electroresection scope includes a fixed handle, an inner sheath 200 rotatably connected to the fixed handle, and an outer sheath 100 connected to the inner sheath 200 by a steel ball. The connection mode of the inner sheath 200 and the fixed handle, and the connection mode of the inner sheath 200 and the outer sheath 100 by the steel ball are not improved in this application, and the embodiments of this application are not repeated. The outer sheath 100 includes an outer sheath tube 110, an outer sheath body 120 connected to the outer sheath tube 110, an inlet valve 130 and an outlet valve 140 installed on the outer sheath body 120, and the inlet valve 130 and the outlet valve 140 are threadedly installed on the outer sheath body 120. The inner sheath 200 includes an inner sheath tube 220 and an inner sheath body 210. After the inner sheath tube 220 and the outer sheath tube 110 are connected, the inner sheath tube 220 and the outer sheath tube 110 are coaxial, and the inner sheath body 210 and the outer sheath body 120 are coaxially connected.

[0028] Reference Figure 2 Two sealing rings 300 are installed on the inner wall of the outer sheath body 120, and the sealing ring 300 is in squeeze contact with the outer wall of the inner sheath body 210. The sealing ring 300 is in contact with the inner wall of the outer sheath body 120 and the outer wall of the inner sheath body 210 respectively. The liquid inlet is located in the two sealing rings 300. The sealing ring 300 blocks the distance between the outer sheath 100 and the inner sheath 200, so that the injection liquid can only enter the inner sheath 200 from the liquid inlet.

[0029] Specifically, refer to Figure 3 The sealing ring 300 of the embodiment of the present application is bent and distributed along the circumference of the outer sheath body 120, the sealing ring 300 is divided into multiple sections and integrally formed, the central axis of the two adjacent sections of the sealing ring 300 is not coaxial, and the bending distribution of the sealing ring 300 can be specifically a serpentine distribution or a bending progressive distribution. If the serpentine distribution is used, the bending part is in an arc shape, and if the bending is distributed progressively, the bending part forms an angle. The sealing ring 300 of the embodiment of the present application is preferably a serpentine distribution. The setting of the bending distribution of the sealing ring 300 can increase the sealing strength and connection strength between the inner sheath 200 and the outer sheath 100.

[0030] In order to stably install the sealing ring 300 on the inner wall of the outer sheath body 120, a mounting groove 121 is provided on the inner wall of the outer sheath body 120. The bent state of the sealing ring 300 is prefabricated and can be directly installed in the mounting groove 121. The bent portion of the sealing ring 300 contacts the inner wall of the mounting groove 121, and the mounting groove 121 has a positioning effect on the sealing ring 300, so that the sealing ring 300 has a stable sealing effect.

[0031] Further, see Figure 3A guide rod 400 is installed in the outer sheath body 120. A plurality of guide rods 400 are arranged at intervals along the inner wall of the outer sheath 100 in the circumferential direction. The length direction of the guide rod 400 is the same as the radial direction of the outer sheath body 120. A gap is left between the two guide rods for the sealing ring 300 to pass through. The bending part of the sealing ring 300 is in contact with the outer wall of the guide rod 400. The guide rod 400 also plays a role in positioning and guiding the sealing ring 300.

[0032] Further, refer to Figure 4 The guide rod 400 moves along the radial direction of the outer sheath 100 joint, and a driving member for driving the guide rod 400 to move is installed on the outer sheath 100 joint. The guide rod 400 extends out of the outer sheath 100 joint along the radial direction of the outer sheath 100 joint, and the driving member is a driving ring 700, which is sealed and rotatably installed on the outer sheath 100 joint. One end of the guide rod 400 close to the driving ring 700 is a spherical structure, and a groove 710 for inserting the guide rod 400 is provided in the driving ring 700. A magnetic attraction member 720 is embedded inside the groove 710. The magnetic attraction member 720 is a magnet. When the driving ring 700 is rotated to align the groove 710 with the guide rod 400, the guide rod 400 is sucked into the groove 710 of the driving ring 700 by the magnetic attraction member 720. The guide rod 400 moves slightly in the joint of the outer sheath 100. The guide rod 400 and the sealing ring 300 move relatively, but the guide rod 400 always keeps in contact with the sealing ring 300, and only the contact area changes. When the guide rod 400 partially enters the groove 710, the contact area between the guide rod 400 and the sealing ring 300 is reduced. When the inner sheath 200 and the outer sheath 100 are disassembled, the deformation space of the sealing ring 300 increases. When the inner sheath 200 and the outer sheath 100 are connected together, the drive ring 700 is rotated to make the guide rod 400 leave the groove 710, and the guide rod 400 contacts the inner wall of the drive ring 700, so that the contact area between the guide rod 400 and the sealing ring 300 increases, thereby squeezing the sealing ring 300 so that the sealing ring 300 is tightly attached between the inner sheath body 210 and the outer sheath body 120, thereby achieving a better sealing effect and indirectly strengthening the connection strength between the inner sheath 200 and the outer sheath 100.

[0033] Reference Figure 4 , a section of the guide rod 400 extending into the outer sheath 100 is a reducing section 410, and the outer diameter of the guide rod 400 near the inner sheath 200 is the smallest. When the inner sheath 200 and the outer sheath 100 are connected by the steel ball, the guide rod 400 contacts the inner wall of the driving ring 700, and the part with a large outer diameter of the reducing section 410 of the guide rod 400 contacts the sealing ring 300, thereby increasing the connection relationship between the guide rod 400 and the sealing ring 300. Before the inner sheath 200 and the outer sheath 100 need to be detached, the guide rod 400 is inserted into the groove 710, and the part with a small outer diameter of the reducing section 410 of the guide rod 400 contacts the sealing ring 300, thereby appropriately weakening the connection relationship between the guide rod 400 and the sealing ring 300.

[0034] Reference Figure 2 and Figure 4 In order to further improve the connection strength between the inner sheath 200 and the outer sheath 100, the outer wall of the inner sheath body 210 is provided with a slot 211 for the guide rod 400 to be inserted, and the slot 211 is distributed along the circumference of the inner sheath body 210. When the driving ring 700 is rotated to make the inner wall of the driving ring 700 contact with the end of the guide rod 400, the guide rod 400 is inserted into the slot 211, and when the driving ring 700 is rotated to make the guide rod 400 inserted into the groove 710, the guide rod 400 leaves the slot 211. When the guide rod 400 is inserted into the slot 211, the connection strength between the inner sheath 200 and the outer sheath 100 can be further improved.

[0035] Preferably, refer to Figure 5 There is only one driving ring 700, and two grooves 710 in the driving ring 700 are provided corresponding to the two sealing rings 300. The driving ring 700 is provided with a clearance groove 730 for the water inlet valve 130 to pass through. The installation of the water inlet valve 130 and the rotation of the driving ring 700 do not interfere with each other.

[0036] Further, refer to Figure 6 The drive ring 700 is provided with a snap ring 740 in the recess 730. The snap ring 740 is made of a deformable metal material and has a notch 741 for the water inlet valve 130 to be inserted into. The snap ring 740 is squeezed and deformed to snap into the wall of the water inlet valve 130. When the snap ring 740 is snapped into the water inlet valve 130, the drive ring 700 and the outer sheath body 120 are relatively stationary, and all the guide rods are inserted into the slots 211 of the inner sheath 200.

[0037] The implementation principle of the handheld frame structure of a resectoscope in the embodiment of the present application is as follows: The handheld frame structure is mainly composed of an inner sheath 200 and an outer sheath 100. The inner sheath 200 is used to accommodate the insertion part of the resectoscope, while the outer sheath 100 is used as a protective and guiding component; steel balls are installed on the outer sheath body 120, and these steel balls cooperate with the slots on the inner sheath body 210 to achieve a preliminary fixing and guiding effect; two sealing rings 300 installed on the inner wall of the outer sheath body 120 have a local sealing effect on the distance between the inner sheath 200 and the outer sheath 100, so that the injection liquid can only enter the inner sheath 200 from the water inlet valve 130; the movement of the guide rod 400 can not only fine-tune the deformation space of the sealing ring 300, but also insert or leave the inner sheath body 210, thereby enhancing the connection strength and connection stability of the inner sheath 200 and the outer sheath 100.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A handheld structure of a resectoscope, comprising an inner sheath (200) and an outer sheath (100), wherein the outer sheath (100) and the inner sheath (200) are connected by steel balls, characterized in that: The outer sheath (100) comprises an outer sheath tube (110) and an outer sheath body (120); two sealing rings (300) are installed on the inner wall of the outer sheath body (120); the inner sheath (200) contacts the sealing rings (300) when inserted into the outer sheath (100); the sealing rings (300) are bent and distributed along the circumference of the outer sheath body (120); the sealing rings (300) are divided into multiple sections and connected to each other; the central axes of two adjacent sections are not coaxial; an installation groove (121) is opened on the inner wall of the outer sheath body (120); the bent portion of the sealing ring (300) contacts the inner wall of the installation groove (121).

2. The handheld structure of a resectoscope according to claim 1, characterized in that: A guide rod (400) is installed on the inner wall of the outer sheath body (120), and a plurality of guide rods (400) are arranged at intervals along the inner wall of the outer sheath (100) in the circumferential direction, with a spacing for a sealing ring (300) to pass through being left between two adjacent guide rods (400).

3. The handheld structure of a resectoscope according to claim 2, characterized in that: The guide rod (400) moves along the radial direction of the outer sheath (100), and a driving member for driving the guide rod (400) to move is installed on the outer sheath (100).

4. The handheld structure of a resectoscope according to claim 3, characterized in that: The guide rod (400) extends out of the outer sheath (100) joint in a radial direction of the outer sheath (100) joint, the driving member is a driving ring (700), the driving ring (700) is sealingly rotatably mounted on the outer sheath (100) joint, the driving ring (700) is provided with grooves (710), the grooves (710) are distributed at intervals along the circumference of the driving ring (700), and the grooves (710) are provided with magnetic attracting members (720) for attracting the guide rod (400).

5. The handheld structure of a resectoscope according to claim 4, characterized in that: The inner sheath (200) is provided with a slot (211) for inserting the guide rod (400).

6. The handheld structure of a resectoscope according to claim 4, characterized in that: The section of the guide rod (400) extending into the outer sheath (100) is a diameter-reducing section (410), and the outer diameter of the guide rod (400) close to the inner sheath (200) is the smallest.

7. The hand-held structure of a resectoscope according to claim 4, characterized in that: The groove (710) in the driving ring (700) is provided with two circles corresponding to the two sealing rings (300), and the driving ring (700) is provided with a clearance groove (730) for the water inlet valve (130) to pass through.

8. The handheld structure of a resectoscope according to claim 7, characterized in that: The drive ring (700) is provided with a clamping ring (740) in the clearance groove (730), and the clamping ring (740) is clamped to the pipe wall of the water inlet valve (130).

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