Cable fixing mechanism and operating handle

Abstract

The invention belongs to the technical field of endoscopes, and discloses a cable fixing mechanism and an operating handle. The cable fixing mechanism comprises a guide piece, a fixing assembly and an elastic sealing piece. When the cable is pulled, the pulling force acts on the elastic sealing element firstly, the elastic sealing element can deform along with the elastic sealing element to convert concentrated pulling force into dispersed deformation stress, and the pulling force is prevented from acting on a single position in a concentrated mode. And meanwhile, the relative positions of the cable and the guide channel are locked by the fixing assembly, so that the cable is fixed at two positions, and the cable can be effectively prevented from being fixed to be invalid. Besides, the inlet of the guide channel is fixed with the cable in a sealing manner, and the follow-up deformation of the elastic sealing element does not damage the sealing structure of the inlet of the guide channel and the cable, that is, even if the cable is subjected to pulling displacement, the elastic sealing element adapts to displacement change through self deformation and always keeps tight fit sealing with the cable, so that the service life of the cable is prolonged. Therefore, the anti-pulling and high-grade waterproof sealing requirements are met at the same time.

Description

Technical Field

[0001] This invention relates to the field of endoscope technology, and in particular to a cable fixing mechanism and an operating handle. Background Technology

[0002] Endoscopes are widely used in clinical settings such as gastroenterology, respiratory medicine, and urology. They can penetrate deep into the body through natural cavities or tiny incisions to observe lesions, take tissue samples, and perform precise treatments.

[0003] The operating handle is the core component for human-machine interaction in endoscopy. Medical staff can control the lens rotation and instrument movement using the handle. The cable connecting the operating handle to the external host is a key component responsible for image signal transmission, control command transmission, and power supply. For reusable operating handles, repeated sterilization is required, placing higher demands on sealing performance.

[0004] Existing operating handles typically have mounting holes for cables at their tails. After the cable is inserted, a curing adhesive is injected into the gap between the mounting hole and the cable. Once the adhesive solidifies, it secures the cable and forms a seal through bonding force. When the cable is pulled, the tension concentrates at the interface between the mounting hole wall and the adhesive, easily causing the adhesive to crack. This leads to cable fixation failure, insufficient tensile strength, and compromises the sealing effect, ultimately failing to simultaneously meet the requirements for tensile strength and high-level waterproof sealing.

[0005] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0006] The purpose of this invention is to provide a cable fixing mechanism and operating handle to fix the cable at two positions, thereby effectively preventing cable fixing failure. The elastic seal adapts to displacement changes through its own deformation, always maintaining a tight fit and seal with the cable, thus simultaneously meeting the requirements of tensile strength and high-level waterproof sealing.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A cable securing mechanism is disposed on an operating handle for securing a cable and guiding the cable into the interior of the operating handle. The cable securing mechanism includes a guide, a securing component, and a resilient seal, wherein:

[0009] The guide is fixed to the operating handle, and the guide includes a guide channel communicating with the interior of the operating handle. The guide channel is configured to allow the cable to pass through and extend into the interior of the operating handle.

[0010] The fixing component is disposed on the guide and is used to lock the relative position of the cable and the guide channel;

[0011] The elastic seal is installed on the side of the guide away from the operating handle. The elastic seal has a guide channel inside that communicates with the guide channel. The cable can pass through the guide channel and the guide channel in sequence and then enter the interior of the operating handle.

[0012] The entrance of the guide channel is sealed and fixed to the cable so that the elastic seal can deform in accordance with the pulling direction of the cable, thereby buffering the stress generated by the cable due to pulling.

[0013] Preferably, the fixing component includes a clamping member and a fixing member, wherein:

[0014] The clamping member is disposed on the guide member and includes a tapered claw portion that can retract inward to clamp the cable;

[0015] The fixing member is disposed on the guide member and is configured to drive the claw portion to retract inward.

[0016] Preferably, the fixing member has an inner conical surface, which is adapted to the conical outer peripheral surface of the claw portion;

[0017] The fixing member and the guide member are movably connected relative to each other. When the fixing member moves relative to the guide member in a direction close to the claw portion, the inner conical surface gradually presses against the outer peripheral surface of the claw portion to drive the claw portion to retract inward.

[0018] Preferably, the fixing member and the guide member are connected by a thread to achieve relative movement.

[0019] Preferably, the guide is provided with a limiting part, and when the claw part is driven by the fixing member to retract to a preset range, the limiting part abuts against the clamping member.

[0020] Preferably, the claw portion is provided with at least one axial notch along the circumferential direction, and the axial notch penetrates the tapered side surface of the claw portion.

[0021] Preferably, the elastic seal and the fixing member are fixedly connected as an integral structure, the fixing member is a rigid body, and the elastic seal is an elastic body.

[0022] Preferably, one end of the clamping member away from the claw portion is fixedly embedded in the guide member, and a first sealing ring is provided between the clamping member and the guide member.

[0023] Preferably, the fixing member has a second sealing ring on the end wall facing the clamping member. When the fixing member drives the claw portion to retract inward, the second sealing ring can be pressed between the end wall of the fixing member and the claw portion to seal the mating gap between the two.

[0024] An operating handle includes a handle body, a cable, and the aforementioned cable fixing mechanism. The cable fixing mechanism is disposed on the handle body and is used to fix the cable and introduce the cable into the interior of the handle body.

[0025] The beneficial effects of this invention are:

[0026] In this invention, when the cable is stretched, the tensile force first acts on the elastic seal. The elastic seal can deform with the movement, converting the concentrated tensile force into dispersed deformation stress, thus preventing the tensile force from being concentrated on a single location. At the same time, the fixing component locks the relative position of the cable and the guide channel, thereby fixing the cable at two positions and effectively preventing cable fixing failure.

[0027] In addition, the entrance of the guide channel is sealed and fixed to the cable, and the deformation of the elastic seal will not damage the sealing structure between the entrance of the guide channel and the cable. That is, even if the cable is pulled and displaced, the elastic seal adapts to the displacement change through its own deformation and always maintains a tight seal with the cable, thus meeting the requirements of tensile strength and high-level waterproof sealing at the same time. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the cable fixing mechanism provided by the present invention;

[0029] Figure 2 This is a cross-sectional view of the cable fixing mechanism provided by the present invention;

[0030] Figure 3 This is a cross-sectional view of the guide provided by the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the clamping member provided by the present invention;

[0032] Figure 5 This is a cross-sectional view of the fastener provided by the present invention.

[0033] In the picture:

[0034] 100. Operating handle; 200. Cable;

[0035] 1. Guide component; 11. Guide channel; 12. Limiting part;

[0036] 2. Fixing component; 21. Clamping component; 211. Claw portion; 2111. Axial notch; 22. Fixing component; 221. Inner conical surface;

[0037] 3. Elastic seal; 31. Guide channel;

[0038] 4. First sealing ring;

[0039] 5. Second sealing ring. Detailed Implementation

[0040] The invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings, not the entire structure.

[0041] In the description of the invention, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances.

[0042] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] Please see Figures 1 to 5This embodiment provides a cable fixing mechanism, disposed on an operating handle 100, for fixing a cable 200 and guiding the cable 200 into the interior of the operating handle 100. The cable fixing mechanism includes a guide 1, a fixing component 2, and an elastic seal 3. The guide 1 is fixed to the operating handle 100 and includes a guide channel 11 communicating with the interior of the operating handle 100. The guide channel 11 is configured to allow the cable 200 to pass through and extend into the interior of the operating handle 100. The fixing component 2 is disposed on the guide 1 and is used to lock the relative position of the cable 200 and the guide channel 11. The elastic seal 3 covers the side of the guide 1 away from the operating handle 100. The elastic seal 3 has a guide channel 31 communicating with the guide channel 11 inside, allowing the cable 200 to pass through the guide channel 31 and the guide channel 11 in sequence before entering the interior of the operating handle 100. The entrance of the guide channel 31 is sealed and fixed to the cable 200 so that the elastic seal 3 can deform in accordance with the pulling direction of the cable 200, thereby buffering the stress generated by the cable 200 due to pulling.

[0045] When the cable 200 is stretched, the tensile force will first act on the elastic seal 3. The elastic seal 3 can deform with the movement to convert the concentrated tensile force into a dispersed deformation stress, avoiding the tensile force from being concentrated on a single position. At the same time, the fixing component 2 locks the relative position of the cable 200 and the guide channel 11, thereby fixing the cable 200 at two positions and effectively preventing the cable 200 from failing to be fixed.

[0046] In addition, the entrance of the guide channel 31 is sealed and fixed to the cable 200, and the following deformation of the elastic seal 3 will not damage the sealing structure between the entrance of the guide channel 31 and the cable 200. That is, even if the cable 200 is pulled and displaced, the elastic seal 3 adapts to the displacement change through its own deformation and always maintains a tight fit and seal with the cable 200, thereby simultaneously meeting the requirements of tensile strength and high-level waterproof sealing.

[0047] In this embodiment, the entrance of the guide channel 31 is sealed and fixed to the cable 200 with an adhesive. The purpose of this fixing is to ensure that the elastic seal 3 and the cable 200 are linked, so that the elastic seal 3 can deform synchronously when the cable 200 is stretched, thereby achieving stress buffering. Further details are omitted. It should be noted that the elastic seal 3 can be made of materials such as rubber, thermoplastic elastomers, polyurethane, and polytetrafluoroethylene composites in the prior art.

[0048] Specifically, the fixing component 2 includes a clamping member 21 and a fixing member 22. The clamping member 21 is disposed on the guide member 1 and includes a tapered claw portion 211, which is retractable to clamp the cable 200. The fixing member 22 is disposed on the guide member 1 and is configured to drive the claw portion 211 to retract inward.

[0049] Understandably, the clamping component 22 drives the claw portion 211 to retract inward, which enables the clamping force to be applied evenly to the outer periphery of the cable 200, thereby avoiding the problem of concentrated tension. This allows for long-term stable clamping of the cable 200, improving the reliability of the fixation and tensile strength, further dispersing tensile stress, and adapting to cables 200 of different diameters, thus exhibiting high adaptability.

[0050] Furthermore, the fixing member 22 is provided with an inner conical surface 221, which is adapted to the conical outer peripheral surface of the claw portion 211. The fixing member 22 and the guide member 1 are movably connected relative to each other. When the fixing member 22 moves relative to the guide member 1 in a direction close to the claw portion 211, the inner conical surface 221 gradually presses against the outer peripheral surface of the claw portion 211 to drive the claw portion 211 to retract inward.

[0051] With this configuration, the inner conical surface 221 of the fixing member 22 is adapted to the conical outer peripheral surface of the claw part 211, and the fixing member 22 and the guide member 1 can move relative to each other. When the fixing member 22 moves closer to the claw part 211, the inner conical surface 221 can form a gradual and uniform compression on the claw part 211, driving the claw part 211 to retract smoothly towards the center, so that the clamping force is evenly applied to the outer periphery of the cable 200, avoiding damage to the cable 200 or loosening of the fixing caused by local stress. At the same time, the adjustment of the clamping force is more convenient and precise, and the above-mentioned mechanical compression structure is not easy to age and fail, thereby ensuring the tensile strength and sealing stability of the overall structure.

[0052] To enhance installation convenience, the fixing component 22 and the guide component 1 are connected by a thread to allow relative movement. This enables precise fine-tuning of the fixing component 22, ensuring a uniform and gradual pressure exerted by the inner conical surface 221 on the claw portion 211, guaranteeing stable and controllable clamping force. Furthermore, the self-locking characteristic of the threaded structure prevents the fixing component 22 from shifting due to vibration or pulling, ensuring long-term stable clamping. In addition, the threaded connection facilitates the installation and removal of the cable 200 and adapts to cables 200 of different diameters, improving assembly flexibility and equipment maintenance convenience.

[0053] Specifically, the guide member 1 is provided with a limiting part 12. When the claw part 211 is driven by the fixing member 22 to retract to a preset extent, the limiting part 12 abuts against the clamping member 21. With this configuration, the limiting part 12 abuts against the clamping member 21 when the claw part 211 retracts to the preset extent, which can limit the excessive retraction of the claw part 211 to avoid damage to the cable 200, ensure stable and consistent clamping force, and thus improve the reliability of fixation.

[0054] To ensure the durability of the gripper portion 211, at least one axial notch 2111 is provided circumferentially, penetrating the tapered side surface of the gripper portion 211. This provides the gripper portion 211 with the necessary deformation allowance for contraction, allowing it to contract evenly circumferentially when compressed, avoiding localized stress concentration that could damage the gripper portion 211. Simultaneously, it facilitates a tighter clamping fit around the outer periphery of the cable 200, reducing contraction rigidity resistance and making the contraction process smoother. It should be noted that the clamping component 21 can be made of materials such as rubber, thermoplastic elastomers, polyurethane, and polytetrafluoroethylene composites in the prior art to enhance the durability and clamping stability of the gripper portion 211.

[0055] In this embodiment, the elastic seal 3 and the fixing member 22 are fixedly connected as an integral structure. The fixing member 22 is a rigid body, and the elastic seal 3 is an elastic body. This arrangement ensures the relative position stability of the elastic seal 3 and the fixing member 22, guarantees smooth cable 200 insertion, and improves the reliability of the combined sealing and fixing.

[0056] In addition, the rigid fastener 22 can provide stable support for the elastic seal 3. When the elastic seal 3 deforms due to the pulling of the cable 200, the rigidity of the fastener 22 can limit its excessive deformation and prevent the seal from failing due to excessive deformation. At the same time, the buffering force of the elastic seal 3 can be transmitted more efficiently through the integrated structure, enhancing the overall stress dispersion effect.

[0057] It should be noted that the integrated structure of the elastic seal 3 and the rigid fastener 22 can be manufactured using existing injection molding processes, which are mature and convenient, and can efficiently achieve a stable connection between the two.

[0058] Specifically, the end of the clamping member 21 furthest from the claw portion 211 is fixedly embedded in the guide member 1, and a first sealing ring 4 is provided between the clamping member 211 and the guide member 1. This enhances the connection stability between the two to prevent relative displacement, ensuring the clamping accuracy of the claw portion 211. Furthermore, the first sealing ring 4 further strengthens the sealing effect, preventing external moisture and impurities from entering the operating handle 100 through the connection. Together with the elastic sealing member 3, it forms multiple sealing protections, improving the overall sealing reliability and equipment safety.

[0059] To further improve the sealing reliability of the overall structure, a second sealing ring 5 is provided on the end wall of the fixing member 22 facing the clamping member 21. When the fixing member 22 drives the claw part 211 to retract inward, the second sealing ring 5 can be pressed between the end wall of the fixing member 22 and the claw part 211 to seal the mating gap between the two.

[0060] When the claw part 211 retracts, the second sealing ring 5 is pressed between the two, which can block the intrusion of external moisture and impurities. Its sealing effect is enhanced as the clamping force increases, so that the fixing and sealing functions are linked to improve reliability. It also forms multiple protections with the first sealing ring 4 and the elastic sealing element 3, and the sealing effect is enhanced by superposition.

[0061] This embodiment also provides an operating handle, including a handle body, a cable 200 and the aforementioned cable fixing mechanism. The cable fixing mechanism is disposed on the handle body and is used to fix the cable 200 and introduce the cable 200 into the interior of the handle body.

[0062] It is understandable that the operating handle 100, including the aforementioned cable fixing mechanism, can achieve a high level of waterproof sealing, preventing moisture and impurities from entering and protecting internal components, resulting in a long service life, convenient assembly and maintenance, and thus improving the reliability of diagnosis and treatment.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cable fixing mechanism provided on an operating handle (100) for fixing a cable (200) and leading the cable (200) into the interior of the operating handle (100), characterized in that The cable fixing mechanism comprises a guide (1), a fixing assembly (2) and an elastic sealing member (3), wherein: The guide (1) is fixed on the operating handle (100), and the guide (1) comprises a guide channel (11) in communication with the inside of the operating handle (100), which is configured to pass and extend the cable (200) to the inside of the operating handle (100); The fixing assembly (2) is arranged on the guide (1) and is used to lock the relative position of the cable (200) and the guide channel (11); The elastic sealing member (3) is arranged on the side of the guide (1) away from the operating handle (100), and the inside of the elastic sealing member (3) is provided with a guide channel (31) in communication with the guide channel (11), and the cable (200) can pass through the guide channel (31) and the guide channel (11) in sequence and then enter the inside of the operating handle (100); The entrance of the guide channel (31) is sealed and fixed with the cable (200), so that the elastic sealing member (3) can follow the pulling direction of the cable (200) and deform accordingly, thereby buffering the stress generated by the cable (200) due to pulling.

2. A cable securing mechanism according to claim 1, wherein, The fixing assembly (2) comprises a clamping member (21) and a fixing member (22), wherein: The clamping member (21) is arranged on the guide (1) and comprises a tapered jaw portion (211), which can be contracted to clamp the cable (200); The fixing member (22) is arranged on the guide (1) and is configured to drive the jaw portion (211) to contract.

3. A cable securing mechanism according to claim 2, wherein, The fixing member (22) is provided with an inner tapered surface (221) which is adapted to the tapered outer surface of the jaw portion (211); The fixing member (22) is movably connected with the guide (1), and when the fixing member (22) moves relative to the guide (1) in the direction close to the jaw portion (211), the inner tapered surface (221) gradually presses the outer surface of the jaw portion (211) to drive the jaw portion (211) to contract.

4. A cable securing mechanism according to claim 3, wherein, The fixing member (22) and the guide (1) are movably connected through threads.

5. A cable securing mechanism according to claim 4, wherein, The guide (1) is provided with a limiting portion (12), and when the jaw portion (211) is driven by the fixing member (22) to contract to a preset amplitude, the limiting portion (12) abuts against the clamping member (21).

6. A cable securing mechanism according to claim 2, wherein, The jaw portion (211) is provided with at least one axial notch (2111) along the circumference, and the axial notch (2111) penetrates the tapered side surface of the jaw portion (211).

7. A cable securing mechanism according to claim 2, wherein, The elastic sealing member (3) is fixedly connected with the fixing member (22) as an integral structure, the fixing member (22) is a rigid body, and the elastic sealing member (3) is an elastic body.

8. A cable securing mechanism according to claim 2, wherein, The end of the clamping member (21) away from the jaw portion (211) is fixedly embedded in the guide (1), and a first sealing ring (4) is arranged between the clamping member (21) and the guide (1).

9. A cable securing mechanism according to claim 3, wherein, The fixing part (22) is provided with a second sealing ring (5) on the end wall facing the clamping part (21), when the fixing part (22) drives the clamping jaw part (211) to contract, the second sealing ring (5) can be compressed between the end wall of the fixing part (22) and the clamping jaw part (211) to seal the gap between them.

10. A handle, characterized in that The handle body, a cable (200) and a cable fixing mechanism as claimed in any one of claims 1-9, the cable fixing mechanism is arranged on the handle body, used for fixing the cable (200), and introducing the cable (200) into the inside of the handle body.

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