Multi-angle adjustment medical cutter structure

Abstract

This invention discloses a multi-angle adjustable medical cutting tool structure, belonging to the field of medical device technology. The structure includes a drive unit, a transmission mechanism, and an opening / closing assembly. The transmission mechanism includes a drive assembly and a safety assembly. The drive assembly includes a first drive rod and a second drive rod, with the drive unit drivingly connected to the first drive rod, and the first drive rod drivingly connected to the opening / closing assembly. The safety assembly includes a first friction disc, a second friction disc, and a spring. The first friction disc is correspondingly positioned to the drive input end of the first drive rod, and the second friction disc is fixedly mounted on the first drive rod. When the first drive rod moves to its limit position along a first direction, the first and second friction discs slip, generating frictional damping. When the first drive rod moves to its limit position along a second direction, the spring is compressed to its limit state. This structure simplifies mechanical transmission while achieving smooth overload protection for the drive motor during the bidirectional movement of the actuator and precisely limiting the stroke.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a multi-angle adjustable medical cutting tool structure. Background Technology

[0002] In existing medical endoscopic anastomosis devices, the angle adjustment and opening / closing control of the end effector (such as the clamping component) typically employ separate transmission structures, resulting in complex mechanisms and low operational precision. Especially when driving the end effector to clamp or open, existing structures struggle to effectively protect the drive motor during both bidirectional movements. Specifically, when the actuator reaches its limit position, the drive motor often fails due to momentary overload, or requires a complex electronic control system for position detection and power-off control. This not only increases the system's control complexity but also reduces the device's reliability and safety during use.

[0003] To address this, some existing technologies attempt to incorporate unidirectional overload protection structures in the transmission path. However, these structures only provide protection in a single direction of motion and cannot simultaneously ensure smooth limiting and motor protection during bidirectional movement. Furthermore, existing structures often require multiple independent drive sources or complex reversing mechanisms to achieve multi-angle adjustment of the end effector, further increasing structural complexity and manufacturing costs.

[0004] Therefore, how to achieve smooth overload protection of the drive motor during the bidirectional movement of the actuator while simplifying the mechanical structure, accurately limiting the movement stroke, and taking into account the integrated design of multi-angle adjustment function is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The specific technical solution of this invention is as follows: a multi-angle adjustable medical cutting tool structure, mounted on a cutting and anastomosis device, comprising: a drive unit; a transmission mechanism, the transmission mechanism including a drive component and a safety component; an opening and closing component; the drive component including a first drive rod and a second drive rod, the second drive rod being rotatably sleeved on the first drive rod; the drive unit being drivenly connected to the first drive rod, the first drive rod being drivenly connected to the opening and closing component, used to drive the opening and closing component to perform clamping or opening actions; the safety component including a first friction disc and a second friction disc, the first friction disc being correspondingly disposed with the drive input end of the first drive rod, the second friction disc being fixedly mounted on the first drive rod, the safety component also including a spring; the first friction disc and the second friction disc contact each other and slip when the first drive rod moves along a first direction to a first limit position; the spring is compressed to a limit state when the first drive rod moves along a second direction to a second limit position, thereby limiting the stroke of the first drive rod.

[0006] The aforementioned multi-angle adjustable medical cutting tool structure includes a first drive gear and a second drive gear in the drive assembly. The first drive gear and the first drive rod are connected by a transmission thread to form a helical transmission pair, and the second drive gear is fixedly mounted on the second drive rod.

[0007] In the aforementioned multi-angle adjustable medical cutting tool structure, the first friction disc is fixedly connected to the first drive gear and is installed on the side of the first drive gear facing the second drive gear, and the first friction disc is rotatably connected to the first drive rod.

[0008] In the aforementioned multi-angle adjustable medical cutting tool structure, the spring abuts against the end face of the second drive gear via a sliding end face washer, and the second friction disc is fixedly installed at the end of the spring away from the second drive gear.

[0009] In the aforementioned multi-angle adjustable medical cutting tool structure, the second friction disc, on the side closest to the spring, contacts the spring via a sliding end face washer. The aforementioned multi-angle adjustable medical cutting tool structure includes a drive unit that is a motor, which meshes with either the first or second drive gear via a motor gear. The transmission mechanism also includes a shifting component, which comprises a lever and a shift block. The lever is fixedly mounted on the housing of the cutting and anastomosis device, and the shift block is connected to the motor to adjust the position of the motor so that the motor gear meshes with either the first or second drive gear.

[0010] The aforementioned multi-angle adjustable medical cutting tool structure, the repositioning component further includes a rotating seat and a sleeve. The rotating seat is rotatably mounted on the outer shell of the cutting and anastomosis device, and the sleeve is fixedly connected to the rotating seat and sleeved outside the second drive rod. When the rotating seat is rotated, the sleeve can be driven to rotate synchronously.

[0011] The above-mentioned multi-angle adjustable medical knife structure includes an opening and closing assembly comprising a fixed clamp and a movable clamp. The fixed clamp is hinged to the end of the sleeve, and the movable clamp is hinged to the fixed clamp. The movable clamp is provided with a plug-in block, and the end of the first drive rod is movably plugged into the plug-in block.

[0012] In the above-mentioned multi-angle adjustable medical knife structure, the end of the second drive rod facing the opening and closing assembly is provided with an active bevel gear, and the fixed clamp is provided with a sector bevel gear on the side near the second drive rod, and the active bevel gear meshes with the sector bevel gear.

[0013] In the aforementioned multi-angle adjustable medical cutting tool structure, the first friction disc and the second friction disc generate frictional damping during the contact and slippage process, causing the resistance of the drive unit to gradually increase until it stops.

[0014] The beneficial effects of this invention are: 1. By incorporating a safety assembly including a first friction disc, a second friction disc, and a spring in the drive component, the friction discs generate progressively increasing frictional damping during clamping by slipping, and the springs generate progressively increasing elastic resistance during opening. When the first drive rod moves to its extreme position in both directions, the motor load resistance smoothly increases to exceed its maximum output force, achieving bidirectional overload protection. This effectively prevents the motor from being damaged by instantaneous overload, eliminating the need for a complex electronic control system and improving the reliability and safety of the instrument.

[0015] 2. By rotatably connecting the second drive rod to the first drive rod, and setting the first drive gear and the first drive rod to form a helical transmission pair, and the second drive gear and the second drive rod to be fixedly connected, the selective meshing of the motor gear with different drive gears can be achieved by combining the shifting component. Only one drive motor can drive the first drive rod to move axially and the second drive rod to rotate respectively. At the same time, the clamping and opening action and swing angle adjustment of the opening and closing component can be realized, which simplifies the transmission structure and reduces the manufacturing cost.

[0016] 3. By setting a rotating seat and a sleeve, the rotating seat can be rotatably installed on the outer shell of the cutting anastomosis device. The sleeve is fixedly connected to the rotating seat and sleeved outside the second drive rod. When the rotating seat is rotated, the sleeve and the opening and closing assembly hinged to the sleeve can be rotated as a whole around the sleeve axis, realizing the manual angle adjustment of the opening and closing assembly in the circumferential direction. This complements the swing angle adjustment driven by the motor, expanding the flexibility and applicability of multi-angle adjustment.

[0017] 4. The first friction disc is fixedly connected to the first drive gear and rotatably connected to the first drive rod, and the second friction disc is fixedly installed on the first drive rod. During the clamping action, the two friction discs rotate relative to each other and gradually press together, so that the friction damping increases smoothly, avoiding rigid collisions and impact loads, ensuring the smoothness of the overload protection process, and extending the service life of the transmission mechanism.

[0018] 5. By setting preset fixed values ​​for the opening angle and clamping force, the safety component precisely limits the bidirectional movement range of the first drive rod, effectively ensuring the consistency and reliability of each operation of the opening and closing component, simplifying the operation process and reducing surgical risks. Attached Figure Description

[0019] Figure 1 This is an overall structural view of this embodiment; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 7 A magnified view of a section at point C; Figure 4 This describes the specific structure of the transmission mechanism in this embodiment; Figure 5 This is the specific structure of the opening and closing component in this embodiment; Figure 6 This is a structural view of the opening and closing components in the open state in this embodiment; Figure 7 This is a state view of the opening and closing component swinging in one direction in this embodiment; Figure 8 This is a state view of the opening and closing component swinging in another direction in this embodiment; Figure 9 This is the main component used to demonstrate the angle component in this embodiment.

[0020] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Pulley; 12. Motor; 21. First friction disc; 22. Second friction disc; 31. Rotating seat; 32. Spring; 41. First drive gear; 42. First drive rod; 43. Second drive gear; 44. Second drive rod; 45. Active bevel gear; 46. Sector bevel gear; 47. Sleeve; 51. First angle adjusting gear; 52. Second angle adjusting gear; 61. Fixed clamping plate; 62. Movable clamping plate; 63. Insertion block. Detailed Implementation

[0021] In the description of this invention, it should be understood that the terms center, longitudinal, transverse, length, width, thickness, front, back, left, right, upper, lower, axial, radial, vertical, horizontal, inner, and outer, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, 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. Furthermore, the terms first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as first or second may explicitly or implicitly include one or more of that feature. In the description of this invention, "multiple" means two or more, unless otherwise explicitly specified.

[0022] A multi-angle adjustable medical cutting tool structure, referring to Figure 1The device, installed on the cutting anastomosis unit, includes a drive unit, a transmission mechanism, and an opening and closing assembly. The transmission mechanism comprises a drive assembly and a safety assembly. The drive unit provides power, and the transmission mechanism transmits this power to the opening and closing assembly to drive it to perform clamping or opening actions and to achieve multi-angle adjustment.

[0023] Reference Figure 2-4 The drive assembly includes a first drive rod 42 and a second drive rod 44. The second drive rod 44 is a hollow structure and is rotatably sleeved outside the first drive rod 42. The two are coaxially arranged and can rotate relative to each other. The first drive rod 42 is driven by the opening and closing assembly and is used to directly drive the opening and closing assembly to perform clamping or opening actions.

[0024] Reference Figure 2-4 The drive assembly also includes a first drive gear 41 and a second drive gear 43. The first drive gear 41 is sleeved on the first drive rod 42 and is connected to the first drive rod 42 by a transmission thread, forming a helical transmission pair. When the first drive gear 41 rotates, it drives the first drive rod 42 to move axially through the helical transmission pair. The second drive gear 43 is fixedly mounted on the second drive rod 44, and when the second drive gear 43 rotates, it drives the second drive rod 44 to rotate synchronously.

[0025] Reference Figure 2-4 The drive unit is a motor 12, and a motor gear is fixedly mounted on the output shaft of the motor 12. The motor 12 drives the first drive gear 41 or the second drive gear 43 through the meshing of the motor gear, thereby achieving selective power output.

[0026] Reference Figure 2 To achieve the aforementioned selective engagement, the transmission mechanism also includes a shifting assembly. The shifting assembly includes a lever and a shift block 11. The lever is fixedly mounted on the housing 1 of the cutting anastomosis device, and the shift block 11 is fixedly connected to or integrally mounted with the motor 12. When the shift block 11 is moved, the motor 12 can be moved along a preset direction, thereby adjusting the position of the motor gear, allowing the motor gear to selectively engage with the first drive gear 41 or the second drive gear 43.

[0027] Reference Figure 3 The switching assembly also includes a rotating seat 31 and a sleeve 47. The rotating seat 31 is rotatably mounted on the outer shell 1 of the cutting anastomosis device, and the sleeve 47 is fixedly connected to the rotating seat 31 and sleeved outside the second drive rod 44. When the rotating seat 31 is manually rotated, the rotating seat 31 drives the sleeve 47 to rotate synchronously. Since the sleeve 47 and the second drive rod 44 are sleeved together, the rotation of the sleeve 47 does not directly drive the second drive rod 44 to rotate, but instead drives the opening and closing assembly hinged to the end of the sleeve 47 to rotate around the axis of the sleeve 47, thereby realizing the angle adjustment of the opening and closing assembly in the circumferential direction.

[0028] Reference Figure 5 The opening and closing assembly includes a fixed clamping plate 61 and a movable clamping plate 62. The fixed clamping plate 61 is hinged to the end of the sleeve 47, meaning that the fixed clamping plate 61 can swing relative to the sleeve 47 within a certain angle range. The movable clamping plate 62 is hinged to the fixed clamping plate 61, and the two together form the clamping structure of the jaws.

[0029] Reference Figure 5 A plug-in block 63 is provided on the movable clamping plate 62, and the plug-in block 63 is integrally formed with the movable clamping plate 62. The end of the first drive rod 42 is movably plugged into the plug-in block 63. When the first drive rod 42 moves axially, it drives the movable clamping plate 62 to rotate around the hinge point between it and the fixed clamping plate 61 through the plug-in block 63, thereby realizing the clamping or opening action of the movable clamping plate 62 relative to the fixed clamping plate 61.

[0030] Reference Figure 7 and Figure 9 A drive bevel gear 45 is provided on the end of the second drive rod 44 facing the opening and closing assembly. A sector bevel gear 46 is provided on the side of the fixed clamping plate 61 near the second drive rod 44. The sector bevel gear 46 is fixedly connected to the fixed clamping plate 61 or integrally formed therefrom. The drive bevel gear 45 and the sector bevel gear 46 mesh with each other. When the motor 12 drives the second drive gear 43 to rotate, the second drive gear 43 drives the second drive rod 44 to rotate. The second drive rod 44, through the meshing of the drive bevel gear 45 and the sector bevel gear 46, drives the fixed clamping plate 61 to swing in a sector shape around its hinge point with the sleeve 47, thereby realizing the angle adjustment of the opening and closing assembly in the swing direction.

[0031] Reference Figure 3 The safety component is located on the power transmission path of the drive assembly to protect the drive unit when the first drive rod 42 moves to its extreme position in both directions and to precisely limit the stroke. The safety component includes a first friction disc 21, a second friction disc 22, and a spring 32.

[0032] Reference Figure 3 The first friction disc 21 is fixedly connected to the first drive gear 41 and is installed on the side of the first drive gear 41 facing the second drive gear 43. The first friction disc 21 is rotatably connected to the first drive rod 42, that is, the first friction disc 21 can rotate with the first drive gear 41, but will not interfere with the axial movement of the first drive rod 42.

[0033] Reference Figure 3 The second friction disc 22 is fixedly installed on the end of the spring 32 away from the second drive gear 43, and the second friction disc 22 is fixedly installed on the first drive rod 42, rotating and moving axially synchronously with the first drive rod 42.

[0034] Reference Figure 3 Spring 32 is sleeved on the first drive rod 42. One end of spring 32 abuts against the end face of the second drive gear 43 through a sliding end face washer, and the other end abuts against the second friction disk 22 through another sliding end face washer. Specifically, a sliding end face washer is provided between the end of spring 32 away from the second drive gear 43 and the side of the second friction disk 22 near spring 32 to reduce friction loss and ensure uniform transmission of the force of spring 32.

[0035] Reference Figure 3 When the motor gear meshes with the first drive gear 41, the motor 12 drives the first drive gear 41 to rotate. The first drive gear 41 drives the first drive rod 42 to move axially through a helical transmission pair.

[0036] Reference Figure 1 and Figure 6 If the first drive rod 42 moves away from the closing assembly (i.e., in the first direction), the first drive rod 42 pulls the movable clamping plate 62 through the plug block 63, causing the movable clamping plate 62 to rotate around the hinge towards the fixed clamping plate 61, thus achieving the clamping action of the opening and closing assembly. During this process, the first drive rod 42 drives the second friction disc 22 to rotate and move towards the first friction disc 21. When the first drive rod 42 moves to the first limit position, the first friction disc 21 and the second friction disc 22 come into contact with each other. Due to the relative rotation between the two friction discs, slippage occurs after contact. As the first drive rod 42 continues to move, the second friction disc 22 continues to rotate and move closer towards the first friction disc 21, the clamping force between the two friction discs gradually increases, the friction damping gradually increases, and finally, the first drive rod 42 stops, preventing it from continuing to rotate. During the process from the initial contact and slippage of the first friction disc 21 and the second friction disc 22 until complete stop, the load resistance of the motor 12 shows a gradual increasing trend, rather than a sudden increase, thereby avoiding damage to the motor 12 due to sudden overload. This process actually involves the resistance of motor 12 gradually increasing until it exceeds its maximum output force, thereby achieving a smooth stop.

[0037] Reference Figure 3 and Figure 4If the first drive rod 42 moves towards the opening / closing assembly (i.e., in the second direction), the first drive rod 42 pushes the movable clamping plate 62 through the insertion block 63, causing the movable clamping plate 62 to rotate around the hinge point away from the fixed clamping plate 61, thus realizing the opening action of the opening / closing assembly. During this process, the second friction disc 22 moves away from the first friction disc 21, compressing the spring 32 while rotating. As the first drive rod 42 continues to move, the spring 32 is gradually compressed, and the reaction force it exerts on the second friction disc 22 continuously increases. Since the second friction disc 22 is fixedly mounted on the first drive rod 42, the reaction force of the spring 32 on the second friction disc 22 is directly transmitted to the first drive rod 42, so the resistance experienced by the first drive rod 42 gradually increases during its movement. When the first drive rod 42 moves to the second limit position, the spring 32 is fully compressed to its limit state and cannot continue to deform, thereby restricting the first drive rod 42 from continuing to move. During this process, the load resistance of motor 12 gradually increases to exceed its maximum output force, achieving a smooth stop and effectively protecting motor 12 from overload.

[0038] During the clamping and opening process of the aforementioned opening and closing components, the bidirectional movement range of the first drive rod 42 is precisely limited by the safety components. Since the movement range of the first drive rod 42 is predetermined, the opening angle and clamping force between the fixed clamping plate 61 and the movable clamping plate 62 are both preset fixed values. Based on this principle, this structure can achieve preset fixed opening angles and preset fixed clamping forces, ensuring consistency and reliability in each operation.

[0039] Reference Figure 7 and Figure 8 When the motor gear meshes with the second drive gear 43, the motor 12 drives the second drive gear 43 to rotate, which in turn drives the second drive rod 44 to rotate. The second drive rod 44, through the meshing of the active bevel gear 45 and the sector bevel gear 46, drives the fixed clamp 61 to swing around the hinge point between it and the sleeve 47, thereby realizing the angle adjustment of the opening and closing assembly in the swing direction.

[0040] When the rotating seat 31 is manually rotated, the rotating seat 31 drives the sleeve 47 to rotate, and the sleeve 47 drives the fixed clamp 61 hinged to it to rotate around the axis of the sleeve 47, thereby realizing the angle adjustment of the opening and closing assembly in the circumferential direction.

[0041] The implementation principle of this application is as follows: The motor 12 selectively engages with either the first drive gear 41 or the second drive gear 43 via a switching component. When engaged with the first drive gear 41, the motor 12 drives the first drive gear 41 to rotate, which in turn drives the first drive rod 42 to move axially via a helical transmission pair, thereby driving the movable clamping plate 62 to perform clamping or opening actions relative to the fixed clamping plate 61. During this process, the safety component generates gradually increasing frictional damping through the contact slippage of the first friction disc 21 and the second friction disc 22 in the clamping direction, and gradually increases elastic resistance through the gradual compression of the spring 32 in the opening direction. When the first drive rod 42 moves to its extreme position in both directions, the load resistance of the motor 12 smoothly increases to exceed its maximum output force, achieving braking. Thus, without the need for complex electronic control, bidirectional overload protection is provided for the drive motor 12, and the movement stroke of the opening and closing components is precisely limited. When motor 12 meshes with the second drive gear 43, motor 12 drives the second drive rod 44 to rotate. Through the meshing of the active bevel gear 45 and the sector bevel gear 46, the fixed clamping plate 61 swings, thereby adjusting the swing angle of the opening and closing assembly. When the rotating seat 31 is manually rotated, the rotating seat 31 drives the fixed clamping plate 61 to rotate as a whole through the sleeve 47, thereby adjusting the circumferential angle of the opening and closing assembly.

[0042] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-angle adjustable medical cutting tool structure, mounted on a cutting and anastomosis device, characterized in that, include: Drive unit; A transmission mechanism, the transmission mechanism including a drive component and a safety component; An opening and closing assembly; the driving assembly includes a first driving rod (42) and a second driving rod (44), the second driving rod (44) being rotatably sleeved on the first driving rod (42); the driving unit is driven connected to the first driving rod (42), the first driving rod (42) is driven connected to the opening and closing assembly, and is used to drive the opening and closing assembly to perform clamping or opening actions; the safety assembly includes a first friction disc (21) and a second friction disc (22), the first friction disc (21) being correspondingly arranged with the driving input end of the first driving rod (42), the second friction disc (22) being fixedly installed on the first driving rod (42), the safety assembly also includes a spring (32); the first friction disc (21) and the second friction disc (22) contact each other and slip when the first driving rod (42) moves to the first limit position along the first direction; the spring (32) is compressed to the limit state when the first driving rod (42) moves to the second limit position along the second direction, so as to limit the stroke of the first driving rod (42).

2. The multi-angle adjustable medical cutting tool structure according to claim 1, characterized in that, The drive assembly further includes a first drive gear (41) and a second drive gear (43). The first drive gear (41) and the first drive rod (42) are connected by a transmission thread to form a helical transmission pair. The second drive gear (43) is fixedly installed on the second drive rod (44).

3. The multi-angle adjustable medical cutting tool structure according to claim 2, characterized in that, The first friction disc (21) is fixedly connected to the first drive gear (41) and is installed on the side of the first drive gear (41) facing the second drive gear (43). The first friction disc (21) is rotatably connected to the first drive rod (42).

4. The multi-angle adjustable medical cutting tool structure according to claim 2, characterized in that, The spring (32) abuts against the end face of the second drive gear (43) through a sliding end face washer, and the second friction disc (22) is fixedly installed at the end of the spring (32) away from the second drive gear (43).

5. The multi-angle adjustable medical cutting tool structure according to claim 4, characterized in that, The second friction disc (22) is in contact with the spring (32) on the side closest to the spring (32) through a sliding end face washer.

6. The multi-angle adjustable medical cutting tool structure according to claim 2, characterized in that, The driving unit is a motor (12), which is driven by a motor gear meshing with the first driving gear (41) or the second driving gear (43). The transmission mechanism also includes a shifting component, which includes a lever and a shifting block (11). The lever is fixedly mounted on the housing (1) of the cutting anastomosis device, and the shifting block (11) is connected to the motor (12) to adjust the position of the motor (12) so that the motor gear meshes with the first driving gear (41) or the second driving gear (43).

7. The multi-angle adjustable medical cutting tool structure according to claim 6, characterized in that, The switching assembly also includes a rotating seat (31) and a sleeve (47). The rotating seat (31) is rotatably mounted on the outer shell (1) of the cutting anastomosis device. The sleeve (47) is fixedly connected to the rotating seat (31) and is sleeved outside the second drive rod (44). When the rotating seat (31) is rotated, the sleeve (47) can be driven to rotate synchronously.

8. The multi-angle adjustable medical cutting tool structure according to claim 7, characterized in that, The opening and closing assembly includes a fixed clamping plate (61) and a movable clamping plate (62). The fixed clamping plate (61) is hinged to the end of the sleeve (47). The movable clamping plate (62) is hinged to the fixed clamping plate (61). A plug-in block (63) is provided on the movable clamping plate (62). The end of the first drive rod (42) is movably plugged into the plug-in block (63).

9. The multi-angle adjustable medical cutting tool structure according to claim 8, characterized in that, The second drive rod (44) is provided with a drive bevel gear (45) on one end facing the opening and closing assembly, and the fixed clamp (61) is provided with a sector bevel gear (46) on one side near the second drive rod (44), and the drive bevel gear (45) meshes with the sector bevel gear (46).

10. The multi-angle adjustable medical cutting tool structure according to claim 1, characterized in that, During the contact and slippage process between the first friction disc (21) and the second friction disc (22), frictional damping is generated, causing the resistance of the drive unit to gradually increase until it stops.

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