Linear cutting anastomat capable of preventing secondary percussion

Abstract

The utility model relates to the technical field of medical instruments, in particular to a linear cutting anastomat capable of preventing secondary percussion, which comprises a percussion assembly, a locking assembly and a resetting assembly. A cutting blade is arranged at the front end of the percussion assembly; a driving handle is arranged at the rear end; the locking assembly limits the action of the driving handle through a sliding rod and a limiting block, so that secondary percussion is avoided; the reset assembly achieves the automatic reset function through an elastic piece and a guide piece. Through the mechanical structure design, a complex electronic module is not needed, the secondary percussion risk is effectively prevented, meanwhile, the manufacturing cost and the operation difficulty are reduced, the stability and the reliability of equipment are improved, and the problems that in the prior art, secondary percussion hidden dangers exist, and operation is inconvenient are solved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a linear cutting anastomosis device that prevents secondary firing. Background Technology

[0002] In the field of medical devices, linear staplers are an important tool widely used in surgical procedures. They use mechanical structures to cut and suture tissues, ensuring surgical efficiency and safety.

[0003] Currently, most linear staplers on the market rely on complex mechanical linkage designs to achieve their firing function. However, in actual use, some devices pose certain safety hazards, such as the possibility of secondary firing due to misoperation, which could cause unnecessary harm to the patient. Furthermore, existing devices typically require additional complex locking mechanisms or electronic control modules to prevent secondary firing, which not only increases manufacturing costs but also makes equipment maintenance more difficult.

[0004] Therefore, we have made improvements to this by proposing a linear cutting stapler that prevents secondary firing. Utility Model Content

[0005] The purpose of this invention is to solve the problem of secondary firing risk in the current linear cutting anastomosis device during use, while avoiding the defects of increased manufacturing cost and inconvenience of operation caused by adding a complex structure.

[0006] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a linear cutting anastomosis device with anti-secondary firing capability, comprising a firing assembly, a locking assembly, and a reset assembly. The firing assembly has a cutting blade at its front end and a drive handle at its rear end. The locking assembly is located inside the firing assembly and is linked to the drive handle, thereby restricting the firing process to prevent secondary firing. The reset assembly is used to restore the locking assembly to its initial state after firing. The reset assembly includes an elastic element and a guide element. One end of the elastic element is connected to the locking assembly, and the other end is fixedly connected to the housing of the firing assembly. The guide element guides the extension and retraction direction of the elastic element.

[0007] The locking assembly includes a limiting block and a sliding rod. The limiting block is fixed to one end of the sliding rod, and the other end of the sliding rod passes through the housing of the firing assembly and extends to the outside. A positioning ring is sleeved on the outside of the sliding rod, and a damping layer is provided between the positioning ring and the sliding rod. The damping layer is used to control the moving speed of the sliding rod. The bottom end of the limiting block has a toothed protrusion, which meshes with the toothed groove on the drive handle. When the drive handle is triggered, the toothed groove pushes the limiting block upward, thereby causing the sliding rod to slide along the housing, so that the limiting block disengages from the toothed groove, completing one firing action.

[0008] As a preferred technical solution of this application, the firing assembly includes a housing and a transmission mechanism disposed inside the housing. The transmission mechanism includes a connecting rod and a push rod. One end of the connecting rod is hinged to a drive handle, and the other end is connected to the push rod. A cutting blade is provided at the front end of the push rod, and a return spring is provided at the rear end of the push rod. One end of the return spring is fixedly connected to the push rod, and the other end is fixedly connected to the inner wall of the housing. A rotating shaft is provided in the middle of the connecting rod. The rotating shaft is fixed to the inner wall of the housing. When the connecting rod rotates around the rotating shaft, it pushes the push rod forward, thereby driving the cutting blade to complete the cutting action.

[0009] As a preferred technical solution of this application, the locking component further includes a limiting groove, which is formed on the inner wall of the housing. The limiting groove has an arc-shaped cross-section. The outer side of the sliding rod is provided with an arc-shaped protrusion that matches the limiting groove. The arc-shaped protrusion is embedded in the limiting groove and slides inside it. The two ends of the limiting groove are respectively provided with a first stop and a second stop. The first stop is used to limit the initial position of the sliding rod, and the second stop is used to limit the maximum stroke of the sliding rod. When the sliding rod moves to the second stop, the limiting block completely disengages from the tooth groove, and at this time the drive handle cannot be triggered again.

[0010] As a preferred technical solution of this application, the reset assembly further includes a guide groove, which is formed on the inner wall of the housing. The guide groove has a rectangular cross-section. One end of the elastic element is provided with a locking block, which is embedded in the guide groove and slides inside it. The two ends of the guide groove are respectively provided with a third stop and a fourth stop. The third stop is used to limit the initial position of the locking block, and the fourth stop is used to limit the maximum stroke of the locking block. When the elastic element is compressed, the locking block moves along the guide groove towards the fourth stop. When the elastic element returns to its original state, the locking block moves along the guide groove towards the third stop, thereby driving the sliding rod to return to its initial position.

[0011] As a preferred technical solution of this application, the outer side of the drive handle is provided with anti-slip texture, the anti-slip texture is composed of multiple raised stripes, the cross-section of the raised stripes is semi-circular, the bottom of the drive handle is provided with a mounting hole, the mounting hole is used to hinge with the connecting rod, the inner wall of the mounting hole is provided with a thread, the thread is used to cooperate with the bolt on the connecting rod, thereby realizing the fixed connection between the drive handle and the connecting rod.

[0012] As a preferred technical solution of this application, the outer side of the housing is provided with an observation window, the observation window is made of transparent material, the inner side of the observation window is provided with scale lines, the scale lines are used to indicate the moving distance of the sliding rod, and the top of the observation window is provided with a protective cover, the protective cover is used to protect the observation window from external pollution.

[0013] As a preferred technical solution of this application, the bottom of the housing is provided with a support plate, and the two ends of the support plate are respectively provided with fixing holes for connecting to an operating table or other fixing devices. The middle part of the support plate is provided with a reinforcing rib for improving the strength of the support plate. The bottom of the support plate is provided with an anti-slip pad made of rubber material. The surface of the anti-slip pad is provided with multiple grooves for increasing friction.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] By employing a locking and reset component, the sliding rod and limit block work together to restrict the drive handle. Once the drive handle is triggered, the limit block disengages from the toothed groove and moves to its maximum stroke, preventing further triggering and effectively avoiding the risk of secondary firing. Simultaneously, the locking component automatically resets through the cooperation of an elastic element and a guide element, ensuring the device quickly returns to its initial state after each firing, ready for the next use. Furthermore, this invention utilizes a mechanical structure design, eliminating the need for complex electronic control modules or independent safety devices, reducing manufacturing costs and maintenance difficulty, while improving the stability and reliability of the equipment. It solves the problems of secondary firing risks and complex operation inherent in existing linear cutting staplers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0018] Figure 3 This is a magnified view of a portion of the locked component.

[0019] Figure 4 This is a schematic diagram of the reset component.

[0020] Figure 5 This is a schematic diagram of the structure of the bottom support plate of the shell.

[0021] The attached figures are labeled as follows:

[0022] 1. Housing; 2. Drive handle; 3. Sliding rod; 4. Limiting block; 5. Elastic element; 6. Guide element; 7. Observation window; 8. Support plate; 9. Fixing hole; 10. Anti-slip pad. Detailed Implementation

[0023] This utility model relates to a linear cutting anastomosis device that prevents secondary firing, and its specific implementation is described in detail with reference to the accompanying drawings. Figure 1As shown, the linear anastomosis device includes a housing 1, a drive handle 2, a sliding rod 3, a limiting block 4, an elastic element 5, a guide element 6, an observation window 7, a support plate 8, a fixing hole 9, and an anti-slip pad 10. The housing 1 is the main structure of the entire device, and it contains a firing assembly, a locking assembly, and a reset assembly, which work together to prevent secondary firing. The specific connection relationships, positional relationships, and mutual cooperation relationships of each component will be described below with reference to the accompanying drawings.

[0024] The external shape of shell 1 is as follows Figure 1 As shown, the device is elongated in shape, with a cutting blade mounted at the front and a drive handle 2 at the rear. An observation window 7, made of transparent material, is located on the top of the housing 1, with graduated lines on its inner side to indicate the movement distance of the sliding rod 3. A protective cover is provided on the top of the observation window 7 to protect it from external contamination. A support plate 8 is connected to the bottom of the housing 1 via bolts or other fixing methods. Two fixing holes 9 are provided at each end of the support plate 8 for connection to an operating table or other fixing devices. A reinforcing rib is provided in the middle of the support plate 8 to increase its strength, and an anti-slip pad 10, made of rubber material with multiple grooves on its surface, is also provided at the bottom to increase friction and ensure greater stability of the device during use.

[0025] like Figure 2 As shown, the housing 1 contains a firing assembly, a locking assembly, and a reset assembly. The firing assembly includes a transmission mechanism consisting of a connecting rod and a push rod. One end of the connecting rod is hinged to the drive handle 2, and the other end is connected to the push rod. The front end of the push rod has a cutting blade, and the rear end has a reset spring. One end of the reset spring is fixedly connected to the push rod, and the other end is fixedly connected to the inner wall of the housing 1. The middle part of the connecting rod is fixed to the inner wall of the housing 1 via a pivot. When the drive handle 2 is triggered, the connecting rod rotates around the pivot, pushing the push rod forward, thereby driving the cutting blade to complete the cutting action. The outer side of the drive handle 2 has anti-slip texture, which consists of multiple raised stripes with a semi-circular cross-section to increase friction during operation. The bottom of the drive handle 2 has a mounting hole with threads on the inner wall for engagement with bolts on the connecting rod, thereby achieving a fixed connection between the drive handle 2 and the connecting rod.

[0026] The locking assembly is located inside the housing 1, and its main components include a sliding rod 3, a limiting block 4, and a positioning ring. One end of the sliding rod 3 is fixed to the limiting block 4, and the other end passes through the housing 1 and extends to the outside. A positioning ring is fitted around the outside of the sliding rod 3, and a damping layer is provided between the positioning ring and the sliding rod 3. The damping layer is used to control the moving speed of the sliding rod 3. The bottom end of the limiting block 4 has a toothed protrusion that meshes with a toothed groove on the drive handle 2. When the drive handle 2 is triggered, the toothed groove pushes the limiting block 4 upward, thereby causing the sliding rod 3 to slide along the housing 1, disengaging the limiting block 4 from the toothed groove, completing one firing action. Figure 3 As shown, a limiting groove is formed on the inner wall of the housing 1. The cross-section of the limiting groove is arc-shaped. An arc-shaped protrusion matching the limiting groove is provided on the outer side of the sliding rod 3. The arc-shaped protrusion is embedded in the limiting groove and slides inside it. A first stop and a second stop are respectively provided at both ends of the limiting groove. The first stop is used to limit the initial position of the sliding rod 3, and the second stop is used to limit the maximum stroke of the sliding rod 3. When the sliding rod 3 moves to the second stop, the limiting block 4 completely disengages from the tooth groove. At this time, the drive handle 2 cannot be triggered again, thus effectively avoiding the risk of secondary firing.

[0027] The reset assembly includes an elastic element 5 and a guide element 6. One end of the elastic element 5 is connected to the sliding rod 3, and the other end is fixedly connected to the inner wall of the housing 1. The guide element 6 guides the extension and retraction direction of the elastic element 5 and ensures that the sliding rod 3 can accurately return to its initial position. Figure 4 As shown, a guide groove is formed on the inner wall of the housing 1. The guide groove has a rectangular cross-section. One end of the elastic element 5 is provided with a locking block, which is embedded in the guide groove and slides inside it. A third stop and a fourth stop are respectively provided at both ends of the guide groove. The third stop is used to limit the initial position of the locking block, and the fourth stop is used to limit the maximum stroke of the locking block. When the elastic element 5 is compressed, the locking block moves along the guide groove towards the fourth stop; when the elastic element 5 returns to its original shape, the locking block moves along the guide groove towards the third stop, thereby driving the sliding rod 3 back to its initial position, preparing it for the next use.

[0028] In actual use, the operator first fixes the linear cutting stapler to the operating table through the fixing holes 9 on the support plate 8, and then adjusts the position of the anti-slip pad 10 to ensure the stability of the device. Subsequently, the operator grips the drive handle 2 and applies pressure. The toothed groove on the drive handle 2 pushes the limiting block 4 upward, causing the sliding rod 3 to slide along the limiting groove inside the housing 1 until the limiting block 4 is completely disengaged from the toothed groove. At this time, the connecting rod rotates around the pivot, pushing the push rod forward, thereby driving the cutting blade to complete the cutting action. When the sliding rod 3 moves to the second stop, the limiting block 4 is completely disengaged from the toothed groove, and the drive handle 2 cannot be triggered again, thus avoiding the risk of secondary firing. After firing, the elastic element 5 returns to its original shape under its own elastic force, driving the sliding rod 3 to slide along the limiting groove until the sliding rod 3 returns to the first stop, completing the reset process. During this process, the locking block slides along the guide groove to ensure the accurate movement direction of the sliding rod 3.

[0029] All components of the housing 1 are made of high-strength materials to ensure sufficient strength and durability during use. The positioning ring and damping layer on the outer side of the sliding rod 3 effectively control its movement speed, preventing misoperation due to excessive sliding. The observation window 7 allows operators to observe the movement distance of the sliding rod 3 in real time, thus better understanding the equipment's operating status. The reinforcing ribs and anti-slip pads 10 on the support plate 8 further enhance the equipment's stability and safety.

[0030] As can be seen from the above specific embodiments, this utility model achieves the function of preventing secondary firing through mechanical structure design, without the need for additional complex electronic control modules or independent safety devices, thus reducing manufacturing costs and maintenance difficulty, while improving the stability and reliability of the equipment. The firing assembly, locking assembly, and reset assembly inside the housing 1 cooperate with each other to ensure that the equipment can quickly return to its initial state after one firing, preparing it for the next use.

[0031] To enable those skilled in the art to fully understand and implement this utility model, the following detailed explanation of the operating principle and steps of the linear cutting stapler is provided in conjunction with specific application scenarios.

[0032] In actual surgical scenarios, the operator first secures the linear stapler to the operating table or other stable device through the fixing holes 9 on the support plate 8. The anti-slip pad 10 at the bottom of the support plate 8 contacts the surface of the operating table, and its multiple grooves effectively increase friction, ensuring that the device will not slide or shift during use. Subsequently, the operator adjusts the position of the device so that the cutting blade at its front end is aligned with the tissue to be cut, and confirms the initial position of the sliding rod 3 through the observation window 7. At this time, the sliding rod 3 is in the initial state of being restricted by the first stop under the action of the elastic element 5, and the toothed protrusion of the limiting block 4 is fully engaged with the toothed groove on the drive handle 2, and the locking component is in the locked state to prevent accidental triggering.

[0033] Next, the operator grips the drive handle 2 and applies pressure to initiate the firing process. For example... Figure 2 As shown, the toothed groove of the drive handle 2 pushes the limiting block 4 upward, and the limiting block 4 drives the sliding rod 3 to slide along the limiting groove on the inner wall of the housing 1. Because a damping layer is provided between the positioning ring and the sliding rod 3, the movement speed of the sliding rod 3 is smoothly controlled, preventing accidental triggering due to excessive speed. As the sliding rod 3 moves, the limiting block 4 gradually disengages from the toothed groove on the drive handle 2, the connecting rod rotates around the pivot and pushes the push rod forward, thereby driving the cutting blade at the front end to complete the cutting action. During this process, the scale lines in the observation window 7 can display the movement distance of the sliding rod 3 in real time, helping the operator to monitor the cutting progress.

[0034] When the sliding rod 3 moves to the second stop, the limiting block 4 completely disengages from the tooth groove. At this point, the drive handle 2 cannot be triggered again, effectively avoiding the risk of secondary firing. This function is achieved thanks to the design of the locking component: the arc-shaped structure of the limiting groove fits tightly with the arc-shaped protrusion on the outside of the sliding rod 3, ensuring that the movement trajectory of the sliding rod 3 is accurate and stable; at the same time, the first and second stops respectively limit the initial position and maximum stroke of the sliding rod 3, further improving the safety and reliability of the equipment.

[0035] After the cutting is completed, the reset component begins to function. For example... Figure 4 As shown, the elastic element 5 returns to its original shape under its own elastic force, and the locking block at one end moves along the guide groove towards the third stop, thereby driving the sliding rod 3 to slide along the limiting groove until the sliding rod 3 returns to the first stop. During this process, the guide element 6 ensures that the extension and retraction direction of the elastic element 5 is accurate, while the third and fourth stops at both ends of the guide groove limit the initial position and maximum stroke of the locking block, respectively, ensuring the smoothness of the reset process. When the sliding rod 3 returns to its initial position, the limiting block 4 re-engages with the toothed groove on the drive handle 2, and the locking assembly re-enters the locked state, ready for the next use.

[0036] As can be seen from the above steps, this utility model achieves the function of preventing secondary firing through the ingenious design of the mechanical structure. The limiting block 4 in the locking assembly engages with the toothed groove on the drive handle 2, ensuring that the drive handle 2 cannot be triggered again after each firing; the elastic element 5 and the guide element 6 in the reset assembly work together to ensure that the sliding rod 3 can quickly and accurately return to its initial position. This design not only eliminates the need for additional complex electronic control modules or independent safety devices, but also significantly reduces manufacturing costs and maintenance difficulty, while improving the stability and reliability of the equipment and solving the problem of secondary firing hazards existing in the prior art.

[0037] In summary, this invention ensures the safety and efficiency of the linear cutting stapler during surgery through the precise cooperation between its components, providing more reliable technical support for surgical procedures.

Claims

1. A secondary firing resistant linear cutting stapler, characterized in that, The device includes a housing (1), a drive handle (2), a sliding rod (3), a limiting block (4), an elastic element (5), and a guide (6). The housing (1) is equipped with a firing assembly, a locking assembly, and a reset assembly. The drive handle (2) is located at the rear end of the housing (1) and connected to the firing assembly. The sliding rod (3) passes through the housing (1) and extends to the outside. The limiting block (4) is fixed to one end of the sliding rod (3) and engages with the toothed groove on the drive handle (2). One end of the elastic element (5) is connected to the sliding rod (3), and the other end is fixedly connected to the inner wall of the housing (1). The guide (6) is used to guide the extension and retraction direction of the elastic element (5).

2. The straight line cutting stapler to prevent secondary firing according to claim 1, wherein, The firing assembly includes a connecting rod and a push rod. One end of the connecting rod is hinged to the drive handle (2), and the other end is connected to the push rod. The front end of the push rod is provided with a cutting blade, and the rear end is provided with a return spring. One end of the return spring is fixedly connected to the push rod, and the other end is fixedly connected to the inner wall of the housing (1). The middle part of the connecting rod is fixed to the inner wall of the housing (1) through a rotating shaft.

3. The anti-recoil linear cutting stapler according to claim 1, wherein, The locking assembly also includes a limiting groove, which is opened on the inner wall of the housing (1). The limiting groove has an arc-shaped cross section. The outer side of the sliding rod (3) is provided with an arc-shaped protrusion that matches the limiting groove. The arc-shaped protrusion is embedded in the limiting groove and slides inside it. The two ends of the limiting groove are respectively provided with a first stop and a second stop.

4. A linear cutting stapler for preventing secondary firing according to claim 1, characterized in that, The reset assembly also includes a guide groove, which is formed on the inner wall of the housing (1). The guide groove has a rectangular cross-section. One end of the elastic element (5) is provided with a locking block, which is embedded in the guide groove and slides inside it. The two ends of the guide groove are respectively provided with a third stop and a fourth stop.

5. The anti-recoil linear cutting stapler according to claim 1, wherein, The drive handle (2) has anti-slip texture on the outside. The anti-slip texture is composed of multiple raised stripes. The cross-section of the raised stripes is semi-circular. The bottom of the drive handle (2) has a mounting hole with threads on the inner wall.

6. The anti-recoil linear cutting stapler according to claim 1, wherein, The outer side of the housing (1) is provided with an observation window (7), which is made of transparent material. The inner side of the observation window (7) is provided with scale lines, and the top of the observation window (7) is provided with a protective cover.

7. The anti-recoil linear cutting stapler according to claim 1, wherein, The bottom of the housing (1) is provided with a support plate (8), and the two ends of the support plate (8) are respectively provided with fixing holes (9). The middle part of the support plate (8) is provided with reinforcing ribs, and the bottom of the support plate (8) is provided with an anti-slip pad (10). The anti-slip pad (10) is made of rubber material and has multiple grooves on its surface.

8. The anti-recoil linear cutting stapler according to claim 3, wherein, A positioning ring is sleeved on the outside of the sliding rod (3), and a damping layer is provided between the positioning ring and the sliding rod (3).

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