A dual-clutch overload protection electric stapler

Abstract

The present invention relates to the technical field of electric staplers, and discloses an electric stapler with clutch overload protection, comprising a slender body and a driving handle located at the proximal end of the slender body, the distal end of the slender body extending to the execution end of the electric stapler, and a driving mechanism being arranged inside the driving handle. Through the meshing arrangement of a stabilizing gear and a stabilizing tooth plate, when an overload occurs at the execution end of the stapler, the overload clutch plate follows the overload baffle to move inside the overload guide assembly, at which time the overload clutch plate begins to mesh with the stabilizing gear, that is, the stabilizing tooth plate follows the driving rack to move, driving the stabilizing gear to rotate, and the stabilizing gear drives the overload clutch plate meshed with it on the other side in a certain reverse direction, so as to avoid the overload spring instantly releasing its elastic force after the overload baffle instantly loses its thrust, causing the overload probe rod and the slender body to generate a reciprocating force, resulting in the tool and stapler and other instruments at the execution end of the stapler to continuously retreat or strike in a short period of time.

Description

Technical Field

[0001] The present invention relates to the technical field of electric staplers, and in particular to a dual-clutch overload protection electric stapler. Background Art

[0002] Laparoscopic anastomosis is one of the most common procedures in abdominal surgery and is a fundamental technique that general surgeons must master. Surgeons have used surgical instruments to suture tissue for nearly 200 years. As one of the most successful surgical instruments, staplers are widely used in modern surgery. They can be used to perform all manual suturing procedures in gastrointestinal surgery. Gastrointestinal staplers are considered the most significant advancement in surgical instrumentation in the second half of the 20th century. An increasing number of surgeons are using staplers for esophagojejunostomy, anal preservation for low rectal cancer, and laparoscopic surgery.

[0003] Most existing staplers are divided into two types: manual drive and electric drive. Among them, to facilitate medical staff to operate the stapler to perform surgery on patients, staplers with electric drive actuators are the first choice of medical staff. When using electric staplers, since they are driven by electric drive actuators, even if the actuator is stuck, the output of the electric drive will be overloaded, which will cause the drive part to collapse or even the actuator to collapse, posing a great safety hazard to the human body. Nowadays, some advanced staplers have optimized the phenomena of jamming and overload. When the driving force exceeds a certain set value, the driving component can move in the opposite direction to release the driving force. However, when the driving force is released by pushing, in order to fully release the power, the driving component will move backward a certain distance. This will cause the driving component to move back and forth within this range, that is, retreat and then push forward. When it pushes forward again, the actuator will briefly fire back and forth, causing damage to the affected part of the human body. Summary of the Invention

[0004] (1) Technical solution

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a dual-clutch overload protection electric stapler, comprising a slender body and a driving handle located at the proximal end of the slender body, the distal end of the slender body extending to the execution end of the electric stapler, a driving mechanism is provided inside the driving handle, the driving mechanism comprises a driving assembly and an overload clutch; the driving assembly is located in the inner cavity of the driving handle, the driving assembly comprises a driving rack; the overload clutch comprises an overload spring, an overload probe rod and an overload clutch plate, a firing rod is provided at the distal end of the overload probe rod, the firing rod is located inside the slender body, the overload spring is located at the proximal end of the overload probe rod, an overload baffle is provided at the proximal end of the overload spring, the bottom of the overload baffle is connected to the proximal end of the overload clutch plate; a first wedge block is provided at the proximal end of the overload probe rod, the overload baffle A second wedge block is provided at the far end of the plate, and the first wedge block and the second wedge block inclined surfaces are arranged opposite to each other, and an overload guide assembly is provided inside the far end of the driving rack, and the overload baffle is located at the far end of the driving rack, and the overload baffle is slidably connected to the middle part of the overload guide assembly; the overload baffle is pushed to move by the driving rack, and the overload baffle squeezes the overload spring, the overload spring is compressed, and pushes the overload probe rod and the firing rod to move; when the firing overload is triggered, the firing rod cannot move forward, and the overload spring continues to be compressed until the first wedge block contacts and squeezes the second wedge block, and the second wedge block drives the overload baffle to move upward, and the overload baffle enters the middle part of the overload guide assembly, and the overload baffle moves toward the inside of the overload guide assembly, the overload spring stretches, and the driving rack continues to move.

[0006] Preferably, the overload clutch also includes a stabilizing gear, which is located above the overload clutch plate. A stabilizing tooth plate is provided above the stabilizing gear. The proximal end of the stabilizing tooth plate is fixedly connected to the distal end of the driving rack. The stabilizing gears are respectively located on both sides of the overload probe rod and are respectively rotatably connected to the housing of the driving handle. The stabilizing gear is meshed with the stabilizing tooth plate. Teeth are provided on the upper surface of the overload clutch plate. When the overload clutch plate moves inside the overload guide assembly, the teeth on the overload clutch plate engage with the stabilizing gear.

[0007] Preferably, the overload guide assembly includes a receiving groove, which is opened in the upper middle part of the drive rack, and a support plate is provided at the distal end of the drive rack at the bottom of the overload clutch plate, and guide grooves are respectively provided at the top and bottom of the inner cavity of the receiving groove and on both sides above the support plate, and a bayonet is provided at the distal end of the guide groove at the distal end.

[0008] Preferably, mounting vertical plates are respectively provided at both ends of the bottom of the overload clutch plate and at the top of the overload baffle, and guide convex rollers are respectively provided on both sides of the mounting vertical plates, and the guide convex rollers are slidably matched with the guide grooves, and the guide grooves are trapezoidal in structure; when the first wedge block and the second wedge block contact and squeeze, the overload baffle moves upward, and the guide convex rollers move from the bayonet-limited state to the non-limited position, and the overload baffle enters the receiving groove, and the guide convex rollers move along the guide groove, and the overload clutch plate moves from the state of approaching and contacting the stabilizing gear to the separated state.

[0009] Preferably, a wedge-shaped block is provided at the bottom of the distal end of the stabilizing tooth plate, a retraction slot is provided above the middle portion of the overload probe rod, and the inclined surface of the wedge-shaped block is arranged facing the retraction slot.

[0010] Preferably, the driving mechanism also includes a driving clutch, which is located on the side of the driving rack with teeth. The driving clutch includes a clutch button, and the clutch buttons are respectively located on both sides of the driving handle. A switching groove is provided between the clutch buttons, and a contraction groove is provided between the clutch button and the switching groove, and the clutch button and the contraction groove are slidingly matched. A clutch rod is provided in each clutch button, and a separation protrusion is provided between the two clutch rods. The part of the separation protrusion located in the switching groove is a conical structure, and a clutch spring is provided between the clutch rod and the clutch button.

[0011] Preferably, a locking piece is provided between the clutch rod and the contraction groove. When the two clutch rods are squeezed toward the middle, the locking piece and the clutch rod are in a linear locking state. When the two clutch rods are squeezed toward the middle into the contraction groove, the locking piece and the clutch rod are in a linear release state.

[0012] Preferably, the driving handle includes a clutch trigger, which is located on one side of the driving clutch. A rotating shaft is provided in the middle of the clutch trigger and is rotatably connected to the driving handle. A pushing protrusion is provided in front of the top of the clutch trigger, and the pushing protrusion corresponds to the separation protrusion rod.

[0013] Preferably, the drive assembly further comprises a drive motor, the drive motor is located in the drive handle, a shaft is provided at the output end of the drive motor, a drive screw is provided at the end of the shaft, and the teeth at the bottom of the drive rack cooperate with each other.

[0014] (2) Beneficial effects

[0015] Compared with the prior art, the present invention provides a dual-clutch overload protection electric stapler, which has the following beneficial effects:

[0016] 1. The dual-clutch overload protection electric stapler controls the driving rack in the driving assembly to move toward the slender body through the driving handle, and the driving rack pushes the overload baffle to move, thereby compressing the overload spring between the overload baffle and the overload probe. When the overload spring is compressed to the point where it can push the overload probe forward, the overload baffle, the overload spring and the overload probe move synchronously in the direction of the slender body, so that the distal end of the stapler can perform a cutting and stapling operation on the affected area. When the cutting and stapling operation is in progress, if the slender body and the distal end of the stapler become stuck, the overload probe cannot move, and the driving rack continues to The overload baffle is pushed to move, causing the overload spring to be continuously compressed until the second wedge block at the distal end of the overload baffle contacts the first wedge block on the overload probe rod. Since the driving rack is still pushing, the first wedge block applies force to the second wedge block along its inclined direction. The second wedge block is subjected to an inclined upward force, and then the second wedge block and the overload baffle move upward and move to the middle of the overload guide assembly. At this time, the overload baffle loses its thrust and moves toward the middle of the overload guide assembly. The overload spring releases its elastic force and stretches, and the overload probe loses its thrust, avoiding the continued movement of the driving rack, which may cause an accident inside the anastomosis device in the human body.

[0017] 2. The dual-clutch overload protection electric stapler is configured by meshing a stabilizing gear with a stabilizing tooth plate. When an overload occurs at the stapler's actuator end, the overload clutch plate follows the overload baffle to move toward the inside of the overload guide assembly. At this time, the overload clutch plate begins to mesh with the stabilizing gear, that is, the stabilizing tooth plate follows the drive rack to move, driving the stabilizing gear to rotate, and the stabilizing gear drives the overload clutch plate meshed with it on the other side to move in a certain opposite direction, so as to avoid the overload spring instantly releasing its elastic force after the overload baffle instantly loses its thrust, causing the overload probe rod and the slender body to generate a reciprocating force, resulting in the tool and staples at the stapler's actuator end to continuously retract or fire in a short period of time (in this process, although the stapler's actuator end or slender body fails, resulting in the stapler's distal end unable to perform the firing action, and the slender body and overload probe rod cannot be pushed, it is possible that the slender body and overload probe rod can be retracted normally, resulting in the actuator end continuously firing after retraction).

[0018] 3. The dual-clutch overload protection electric stapler is located in the bayonet at the far end of the guide groove by installing the guide convex roller at the bottom of the vertical plate. At this time, the overload baffle is located at the entrance of the receiving groove and cannot move into the receiving groove. When the first wedge block and the second wedge block contact and squeeze, the second wedge block is subjected to an upward force and begins to move upward until the guide convex roller is disengaged from the bayonet and enters the guide groove. The overload clutch plate moves in the guide groove path of the trapezoidal structure of the guide convex roller until it moves to the tail end of the guide groove. During this process, the overload clutch plate and the stabilizing gear change from a separated state to an engaged state and then to a separated state, thereby preventing the overload clutch plate from moving forward when the drive rack retracts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall sectional three-dimensional structure of the interior of the driving handle of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of the inner part of the driving handle of the present invention;

[0021] Figure 3 For the present invention Figure 2 A local enlarged structural diagram of point A;

[0022] Figure 4 This is a schematic diagram of a partially cutaway three-dimensional structure of an overload clutch according to the present invention;

[0023] Figure 5 It is a schematic diagram of a partial cross-sectional exploded structure of an overload clutch of the present invention;

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at point B;

[0025] Figure 7 This is a second schematic diagram of a partially cutaway three-dimensional structure of the overload clutch of the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the shrinking member of the present invention;

[0027] Figure 9 It is a schematic diagram of the planar structure of the shrinking member of the present invention;

[0028] Figure 10 For the present invention Figure 9 Schematic diagram of the internal cross-sectional plane structure at AA;

[0029] Figure 11 It is a schematic diagram of the partial explosion structure of the slender body and the firing rod of the present invention.

[0030] In the figure: 1. slender body; 2. driving handle; 21. clutch trigger; 22. rotating shaft; 23. pushing protrusion; 3. driving assembly; 31. driving rack; 32. stabilizing gear plate; 321. wedge-shaped card block; 33. supporting plate; 4. driving clutch; 41. clutch button; 42. switching slot; 43. retraction slot; 44. clutch rod; 45. separation protrusion; 46. clutch spring; 5. overload clutch; 51. overload spring; 52. overload probe rod; 521. first wedge block; 522. return card slot; 53. overload clutch plate; 531. mounting vertical plate; 532. guide protrusion roller; 54. overload baffle; 541. second wedge block; 55. stabilizing gear; 6. overload guide assembly; 61. storage slot; 62. guide slot; 63. bayonet; 7. driving motor; 71. shaft; 72. driving screw. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-11, a dual-clutch overload protection electric stapler, comprising a slender body 1, and a driving handle 2 located at the proximal end of the slender body 1, the distal end of the slender body 1 extends to the execution end of the electric stapler, a driving mechanism is provided inside the driving handle 2, the driving mechanism comprises a driving assembly 3 and an overload clutch 5; the driving assembly 3 is located in the inner cavity of the driving handle 2, the driving assembly 3 comprises a driving rack 31; the overload clutch 5 comprises an overload spring 51, an overload probe rod 52 and an overload clutch plate 53, a firing rod is provided at the distal end of the overload probe rod 52, the firing rod is located inside the slender body 1, the overload spring 51 is located at the proximal end of the overload probe rod 52, an overload baffle 54 is provided at the proximal end of the overload spring 51, the bottom of the overload baffle 54 is connected to the proximal end of the overload clutch plate 53; a first wedge block 521 is provided at the proximal end of the overload probe rod 52, and a second wedge block 541 is provided at the distal end of the overload baffle 54, The first wedge block 521 and the second wedge block 541 are arranged with inclined surfaces opposite to each other, and an overload guide assembly 6 is provided inside the distal end of the driving rack 31, and the overload baffle 54 is located at the distal end of the driving rack 31, and the overload baffle 54 is slidingly connected to the middle part of the overload guide assembly 6; the overload baffle 54 is pushed to move by the driving rack 31, and the overload baffle 54 squeezes the overload spring 51, the overload spring 51 is compressed, and pushes the overload probe rod 52 and the firing rod to move; when the firing overload is caused, the firing rod cannot move forward, and the overload spring 51 is continuously compressed until the first wedge block 521 contacts and squeezes the second wedge block 541, and the second wedge block 541 drives the overload baffle 54 to move upward, and the overload baffle 54 enters the middle part of the overload guide assembly 6, and the overload baffle 54 moves toward the inside of the overload guide assembly 6, the overload spring 51 stretches, and the driving rack 31 continues to move.

[0033] The driving rack 31 in the driving assembly 3 is controlled by the driving handle 2 to move toward the slender body 1, and the driving rack 31 pushes the overload baffle 54 to move, thereby compressing the overload spring 51 between the overload baffle 54 and the overload probe 52. Until the overload spring 51 is compressed to the point where it can push the overload probe 52 to move forward, the overload baffle 54, the overload spring 51 and the overload probe 52 move synchronously in the direction of the slender body 1, so that the distal end of the stapler performs a cutting and stapling operation on the affected area; when the cutting and stapling operation is in progress, the slender body 1 and the distal end of the stapler become stuck, and the overload probe 52 cannot move. At this time, the driving rack 31 continues to push the overload baffle 54 to move, resulting in The overload spring 51 is continuously compressed until the second wedge block 541 at the distal end of the overload baffle 54 contacts the first wedge block 521 on the overload probe 52. Since the driving rack 31 is still pushing, the first wedge block 521 applies force to the second wedge block 541 along its inclined direction. The second wedge block 541 is subjected to an inclined upward force, and then the second wedge block 541 and the overload baffle 54 move upward and move to the middle of the overload guide assembly 6. At this time, the overload baffle 54 loses its thrust and moves toward the middle of the overload guide assembly 6. The overload spring 51 releases its elastic force and stretches, while the overload probe 52 loses its thrust, thereby avoiding accidents inside the anastomosis device in the human body caused by the continued movement of the driving rack 31.

[0034] Furthermore, the overload clutch 5 also includes a stabilizing gear 55, which is located above the overload clutch plate 53. A stabilizing tooth plate 32 is provided above the stabilizing gear 55. The proximal end of the stabilizing tooth plate 32 is fixedly connected to the distal end of the driving rack 31. The stabilizing gears 55 are respectively located on both sides of the overload probe 52 and are respectively rotatably connected to the shell of the driving handle 2. The stabilizing gear 55 is meshed with the stabilizing tooth plate 32. The upper surface of the overload clutch plate 53 is provided with teeth. When the overload clutch plate 53 moves inside the overload guide assembly 6, the teeth on the overload clutch plate 53 engage with the stabilizing gear 55; through the meshing arrangement of the stabilizing gear 55 and the stabilizing tooth plate 32, when an overload occurs at the stapler execution end, the overload clutch plate 53 follows the overload baffle 54 to move toward the inside of the overload guide assembly 6. At this time, the overload The clutch plate 53 begins to mesh with the stabilizing gear 55, that is, the stabilizing gear plate 32 moves along with the driving rack 31, driving the stabilizing gear 55 to rotate, and the stabilizing gear 55 drives the overload clutch plate 53 meshed with it on the other side to move in the opposite direction to avoid the overload spring 51 instantly releasing its elastic force after the overload baffle 54 instantly loses its thrust, causing the overload probe rod 52 and the slender body 1 to generate a reciprocating force, resulting in the tool and staples at the execution end of the stapler to continuously retract or fire in a short period of time (in this process, although the execution end or the slender body 1 of the stapler fails, resulting in the distal end of the stapler being unable to perform the firing action, and the slender body 1 and the overload probe rod 52 being unable to push, it is possible that the slender body 1 and the overload probe rod 52 can be retracted normally, resulting in the execution end having a continuous firing phenomenon after retraction).

[0035] Furthermore, the overload guide assembly 6 includes a receiving groove 61, which is opened in the upper middle part of the driving rack 31. The far end of the driving rack 31 is located at the bottom of the overload clutch plate 53 and is provided with a support plate 33. The top and bottom of the inner cavity of the receiving groove 61 and the two sides above the support plate 33 are respectively provided with guide grooves 62, and the far end of the guide groove 62 located at the far end is provided with a bayonet 63; by opening the receiving groove 61 in the upper middle part of the driving rack 31 and cooperating with the support plate 33, the overload clutch plate 53 and the overload baffle 54 can move along the support plate 33 toward the driving rack 31.

[0036] Furthermore, mounting vertical plates 531 are respectively provided at both ends of the bottom of the overload clutch plate 53 and at the top of the overload baffle 54. Guide convex rollers 532 are respectively provided on both sides of the mounting vertical plates 531. The guide convex rollers 532 slide in cooperation with the guide grooves 62. The guide grooves 62 are trapezoidal in structure. When the first wedge block 521 and the second wedge block 541 contact and squeeze, the overload baffle 54 moves upward, and the guide convex rollers 532 move from the state limited by the bayonet 63 to the non-limited position. The overload baffle 54 enters the receiving groove 61, and the guide convex rollers 532 move along the guide grooves 62. The overload clutch plate 53 moves from the state of being close to and in contact with the stabilizing gear 55 to the state of being separated. By means of the guide convex rollers 532 at the bottom of the mounting vertical plates 531 , in the initial stage, it is located in the bayonet 63 at the far end of the guide groove 62. At this time, the overload baffle 54 is located at the entrance of the receiving groove 61 and cannot move into the receiving groove 61. When the first wedge block 521 and the second wedge block 541 contact and squeeze, the second wedge block 541 is subjected to an upward force and begins to move upward until the guide convex roller 532 disengages from the bayonet 63 and the guide convex roller 532 enters the guide groove 62. The overload clutch plate 53 moves along the guide groove 62 path of the trapezoidal structure of the guide convex roller 532 until it moves to the tail end of the guide groove 62. During this process, the overload clutch plate 53 and the stabilizing gear 55 change from a separated state to an engaged state and then to a separated state, preventing the overload clutch plate 53 from moving forward when the drive rack 31 retracts.

[0037] Furthermore, a wedge-shaped block 321 is provided at the bottom of the distal end of the stabilizing tooth plate 32, and a retraction slot 522 is provided above the middle portion of the overload probe 52, and the inclined surface of the wedge-shaped block 321 is arranged in the direction of the retraction slot 522; through the wedge-shaped block 321 provided at the distal end of the stabilizing tooth plate 32, after the overload baffle 54 moves toward the inside of the storage groove 61, the driving rack 31 continues to push until the wedge-shaped block 321 at the distal end of the stabilizing tooth plate 32 passes over the retraction slot 522 above the overload probe 52, and the driving rack 31 completes the pushing. When the driving rack 31 returns, the retraction slot 522 is pulled by the wedge-shaped block 321 to drive the overload probe 52 to retract.

[0038] Furthermore, the driving mechanism also includes a driving clutch 4, which is located on the side of the driving rack 31 with teeth, and the driving clutch 4 includes a clutch button 41, and the clutch buttons 41 are respectively located on both sides of the driving handle 2. A switching groove 42 is provided between the clutch buttons 41, and a contraction groove 43 is provided between the clutch button 41 and the switching groove 42, and the clutch button 41 and the contraction groove 43 are slidably fitted together. A clutch rod 44 is provided in the clutch button 41, and a separation protrusion 45 is provided between the two clutch rods 44. The part of the separation protrusion 45 located in the switching groove 42 is a conical structure, and a clutch spring 46 is provided between the clutch rod 44 and the clutch button 41; when the clutch button 41 is squeezed toward the middle, the separation protrusion 45 is squeezed by the clutch rod 44, wherein the part where the separation protrusion 45 contacts the clutch rod 44 can adopt a wedge block structure, so that when the clutch rod 44 squeezes the separation protrusion 45, the separation protrusion 45 can move to the outside of the switching groove 42.

[0039] Furthermore, a locking piece is provided between the clutch rod 44 and the retraction groove 43. When the two clutch rods 44 are squeezed toward the middle, the locking piece and the clutch rod 44 are in a linear locking state. When the two clutch rods 44 are squeezed toward the middle into the retraction groove 43, the locking piece and the clutch rod 44 are in a linear release state. When the clutch button 41 moves toward the middle, the clutch button 41 retracts into the retraction groove 43, and the clutch rod 44 moves toward the middle of the switching groove 42 until it contacts the conical separation protrusion 45 and pushes the conical separation protrusion 45 to move toward the outside of the switching groove 42. At the same time, under the action of the locking piece, the clutch rod 44 is in a stationary state at this time. The locking piece can adopt the principle of automatic telescopic locking of an automatic ballpoint pen, which is a prior art and will not be elaborated here.

[0040] Furthermore, the driving handle 2 includes a clutch trigger 21, which is located on one side of the driving clutch 4. A rotating shaft 22 is provided in the middle of the clutch trigger 21 for rotationally connecting with the driving handle 2. A pushing protrusion 23 is provided in the front of the top of the clutch trigger 21, and the pushing protrusion 23 corresponds to the separation protrusion 45. The clutch trigger 21 in the driving handle 2 is used to fire the driving mechanism. When the clutch button 41 is squeezed toward the middle, the pushing protrusion 23 is pushed toward the outside of the switching slot 42, thereby jamming the clutch trigger 21. 22 is rotationally connected to the driving handle 2. At this time, the upper end of the clutch trigger 21 cannot be deflected, so that the clutch trigger 21 cannot fire the driving mechanism; when it is necessary to unlock the clutch trigger 21, continue to squeeze the clutch button 41 toward the middle, and the locking piece between the clutch rod 44 and the switching slot 42 is in a linear release state, that is, the clutch rod 44 and the switching slot 42 can move linearly. Under the elastic action of the clutch spring 46 in the clutch button 41, the clutch rod 44 begins to move away from the separation protrusion 45, and the separation protrusion 45 begins to shrink and shrinks into the switching slot 42, completing the unlocking of the clutch trigger 21.

[0041] Furthermore, the drive assembly 3 also includes a drive motor 7, which is located in the drive handle 2. The output end of the drive motor 7 is provided with a shaft 71, and the end of the shaft 71 is provided with a drive screw 72, which cooperates with the teeth at the bottom of the drive rack 31; the drive motor 7 is used to drive the drive screw 72 to rotate through the shaft 71. When the drive screw 72 rotates, it drives the drive rack 31 that cooperates with it to move, thereby driving the overload probe 52 to move in the slender body 1.

[0042] Working principle: During use, in the initial stage, the driving clutch 4 locks the clutch trigger 21 on the driving handle 2. Through the pushing protrusion 23 provided in front of the clutch trigger 21, when the clutch button 41 is squeezed toward the middle, the pushing protrusion 23 is pushed toward the outside of the switching slot 42, thereby locking the clutch trigger 21. Since the middle of the clutch trigger 21 is rotatably connected to the driving handle 2 through the rotating shaft 22, the upper end of the clutch trigger 21 cannot be deflected at this time, making it impossible for the clutch trigger 21 to engage the driving handle 2. When the clutch trigger 21 needs to be unlocked, the clutch button 41 is further pressed toward the middle, and the locking member between the clutch rod 44 and the switching slot 42 is in a linear release state, that is, the clutch rod 44 and the switching slot 42 can move linearly. Under the elastic action of the clutch spring 46 in the clutch button 41, the clutch rod 44 begins to move away from the release protrusion 45, and the release protrusion 45 begins to retract and retract into the switching slot 42, thereby completing the unlocking of the clutch trigger 21.

[0043] In the locking stage of the clutch trigger 21, when the clutch button 41 is pressed toward the middle, the release protrusion 45 is pressed by the clutch rod 44, wherein the contact portion between the release protrusion 45 and the clutch rod 44 can be constructed with a wedge block, so that when the clutch rod 44 presses the release protrusion 45, the release protrusion 45 can move toward the outside of the switching groove 42; in the unlocking stage, the clutch button 41 moves toward the middle, the clutch button 41 shrinks into the shrinking groove 43, and the clutch rod 44 moves toward the middle of the switching groove 42 until it contacts the release protrusion 45 with the conical structure, and pushes the release protrusion 45 with the conical structure to move toward the outside of the switching groove 42, and at the same time, the clutch rod 44 is in a stationary state under the action of the locking member.

[0044] Then, during the operation, the driving motor 7 in the driving handle 2 is used to drive the driving screw 72 to rotate through the shaft 71. When the driving screw 72 rotates, the driving rack 31 matched therewith is driven to move, thereby driving the overload probe 52 to move in the slender body 1. The driving rack 31 in the driving assembly 3 moves toward the slender body 1, and the driving rack 31 pushes the overload baffle 54 to move, thereby compressing the overload spring 51 between the overload baffle 54 and the overload probe 52. When the overload spring 51 is compressed to the point where it can push the overload probe 52 forward, the overload baffle 54, the overload spring 51 and the overload probe 52 move synchronously in the direction of the slender body 1, thereby enabling the distal end of the stapler to perform a cutting and anastomosis operation on the affected area.

[0045] When the cutting and stapling operation is in progress, if the slender body 1 and the distal end of the stapler are stuck, the overload probe 52 cannot move. At this time, the driving rack 31 continues to push the overload baffle 54 to move, causing the overload spring 51 to continue to be compressed until the second wedge block 541 at the distal end of the overload baffle 54 contacts the first wedge block 521 on the overload probe 52. At this time, because the driving rack 31 is still pushing, the first wedge block 521 applies force to the second wedge block 541 along its inclined direction. The second wedge block 541 is subjected to an inclined upward force, and then the second wedge block 541 and the overload baffle 54 move upward and move to the middle of the overload guide assembly 6. At this time, the overload baffle 54 loses its thrust and moves toward the middle of the overload guide assembly 6. The overload spring 51 releases its elastic force and stretches, while the overload probe 52 loses its thrust, thereby preventing the driving rack 31 from continuing to move, causing an accident inside the stapler in the human body.

[0046] In the above process, the stabilizing gear 55 is engaged with the stabilizing tooth plate 32. When the stapler execution end is overloaded, the overload clutch plate 53 follows the overload baffle 54 to move toward the inside of the overload guide assembly 6. At this time, the overload clutch plate 53 begins to engage with the stabilizing gear 55, that is, the stabilizing tooth plate 32 follows the driving rack 31 to move, driving the stabilizing gear 55 to rotate, and the stabilizing gear 55 drives the overload clutch plate 53 on the other side that is engaged with it to rotate in the opposite direction to avoid the overload spring 51 instantly releasing its elastic force after the overload baffle 54 instantly loses its thrust, causing the overload probe rod 52 and the slender body 1 to generate a reciprocating force, resulting in The knife and stapler at the stapler's execution end may experience continuous retraction or firing within a short period of time (during this process, although the stapler's execution end or the slender body 1 may malfunction, causing the stapler's distal end to be unable to fire and the slender body 1 and the overload probe 52 to be unable to push, the slender body 1 and the overload probe 52 may be able to retract normally, causing the execution end to experience continuous firing after retraction). The receiving groove 61 is provided in the upper middle portion of the drive rack 31 and is combined with the support plate 33 to enable the overload clutch plate 53 and the overload baffle 54 to move along the support plate 33 toward the drive rack 31.

[0047] The guide roller 532 at the bottom of the vertical plate 531 is initially located in the notch 63 at the far end of the guide groove 62. At this time, the overload baffle 54 is located at the entrance of the receiving groove 61 and cannot move into the receiving groove 61. When the first wedge block 521 and the second wedge block 541 contact and squeeze each other, the second wedge block 541 is subjected to an upward force and begins to move upward until the guide roller 532 is disengaged from the notch 63. The guide roller 532 enters the guide groove 62, and the overload clutch plate 53 moves along the guide groove 62 with the trapezoidal structure of the guide roller 532 until it moves to the tail end of the guide groove 62. During this process, the overload clutch plate 53 and the stabilizing gear 55 change from a separated state to an engaged state and then to a separated state.

[0048] When an overload occurs, the driving rack 31 continues to push, and then through the wedge-shaped block 321 set at the distal end of the stabilizing tooth plate 32, after the overload baffle 54 moves into the receiving groove 61, the driving rack 31 continues to push until the wedge-shaped block 321 at the distal end of the stabilizing tooth plate 32 passes over the retraction slot 522 above the overload probe rod 52. The driving rack 31 completes the pushing. When the driving rack 31 returns, the retraction slot 522 is pulled by the wedge-shaped block 321 to drive the overload probe rod 52 to retract; the distal end of the anastomosis device is separated from the patient's human tissue for removal.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-clutch overload protection electric stapler, comprising a slender body (1), and a driving handle (2) located at the proximal end of the slender body (1), wherein the distal end of the slender body (1) extends to the execution end of the electric stapler, characterized in that: A driving mechanism is provided inside the driving handle (2), and the driving mechanism includes a driving assembly (3) and an overload clutch (5); the driving assembly (3) is located in the inner cavity of the driving handle (2), and the driving assembly (3) includes a driving rack (31); the overload clutch (5) includes an overload spring (51), an overload probe (52) and an overload clutch plate (53); a firing rod is provided at the distal end of the overload probe (52), and the firing rod is located inside the slender body (1). The overload spring (51) is located at the proximal end of the overload probe (52), and the proximal end of the overload spring (51) is provided with an overload baffle (54), and the bottom of the overload baffle (54) is connected to the proximal end of the overload clutch plate (53); the proximal end of the overload probe (52) is provided with a first wedge block (521), and the distal end of the overload baffle (54) is provided with a second wedge block (541), and the first wedge block (521) and the second wedge block (541) are arranged with inclined surfaces opposite to each other, and the driving An overload guide assembly (6) is provided inside the distal end of the rack (31), and the overload baffle (54) is located at the distal end of the driving rack (31), and the overload baffle (54) is slidably connected to the middle of the overload guide assembly (6); the overload baffle (54) is pushed to move by the driving rack (31), and the overload baffle (54) squeezes the overload spring (51), and the overload spring (51) is compressed and pushes the overload probe rod (52) and the firing rod to move; when the firing overload occurs, The firing rod cannot move forward, and the overload spring (51) is continuously compressed until the first wedge block (521) contacts and squeezes the second wedge block (541), and the second wedge block (541) drives the overload baffle (54) to move upward, and the overload baffle (54) enters the middle of the overload guide assembly (6). The overload baffle (54) moves toward the inside of the overload guide assembly (6), the overload spring (51) stretches, and the drive rack (31) continues to move.

2. The dual-clutch overload protection electric stapler according to claim 1, characterized in that: The overload clutch (5) further comprises a stabilizing gear (55), the stabilizing gear (55) being located above the overload clutch plate (53), a stabilizing tooth plate (32) being provided above the stabilizing gear (55), the proximal end of the stabilizing tooth plate (32) being fixedly connected to the distal end of the driving rack (31), the stabilizing gears (55) being respectively located on both sides of the overload probe rod (52), and being respectively rotatably connected to the housing of the driving handle (2), the stabilizing gear (55) being meshed with the stabilizing tooth plate (32), the upper surface of the overload clutch plate (53) being provided with teeth, and when the overload clutch plate (53) moves inside the overload guide assembly (6), the teeth on the overload clutch plate (53) are meshed with the stabilizing gear (55).

3. The dual-clutch overload protection electric stapler according to claim 2, characterized in that: The overload guide assembly (6) includes a receiving groove (61), the receiving groove (61) is opened in the upper middle part of the driving rack (31), the distal end of the driving rack (31) is located at the bottom of the overload clutch plate (53) and is provided with a support plate (33), the top and bottom of the inner cavity of the receiving groove (61) and the two sides above the support plate (33) are respectively provided with guide grooves (62), and the distal end of the guide groove (62) is provided with a bayonet (63).

4. The dual-clutch overload protection electric stapler according to claim 3, characterized in that: The two ends of the bottom of the overload clutch plate (53) and the top of the overload baffle (54) are respectively provided with mounting vertical plates (531), and the two sides of the mounting vertical plates (531) are respectively provided with guide convex rollers (532), and the guide convex rollers (532) are slidably matched with the guide groove (62), and the guide groove (62) is trapezoidal in structure; when the first wedge block (521) and the second wedge block (541) contact and squeeze, the overload baffle (54) moves upward, and the guide convex rollers (532) move from the state of being limited by the bayonet (63) to the non-limiting position, and the overload baffle (54) enters the receiving groove (61), and the guide convex rollers (532) move along the guide groove (62), and the overload clutch plate (53) moves from the state of being close to and in contact with the stabilizing gear (55) to the state of being separated.

5. The dual-clutch overload protection electric stapler according to claim 2, characterized in that: A wedge-shaped clamping block (321) is provided at the bottom of the distal end of the stabilizing tooth plate (32), a retraction clamping groove (522) is provided above the middle portion of the overload probe (52), and the inclined surface of the wedge-shaped clamping block (321) is arranged in the direction of the retraction clamping groove (522).

6. The dual-clutch overload protection electric stapler according to claim 1, characterized in that: The driving mechanism further comprises a driving clutch (4), wherein the driving clutch (4) is located on a side of the driving rack (31) with teeth, and the driving clutch (4) comprises a clutch button (41), wherein the clutch buttons (41) are respectively located on both sides of the driving handle (2), a switching groove (42) is provided between the clutch buttons (41), a contraction groove (43) is provided between the clutch button (41) and the switching groove (42), and the clutch button (41) and the contraction groove (43) are slidably matched, a clutch rod (44) is provided in each of the clutch buttons (41), a separation protrusion (45) is provided between the two clutch rods (44), a portion of the separation protrusion (45) located in the switching groove (42) is of a conical structure, and a clutch spring (46) is provided between the clutch rod (44) and the clutch button (41).

7. The dual-clutch overload protection electric stapler according to claim 6, characterized in that: A locking piece is provided between the clutch rod (44) and the contraction groove (43); when the two clutch rods (44) are pressed toward the middle, the locking piece and the clutch rod (44) are in a linear locking state; when the two clutch rods (44) are pressed toward the middle into the contraction groove (43), the locking piece and the clutch rod (44) are in a linear releasing state.

8. The dual-clutch overload protection electric stapler according to claim 6, characterized in that: The driving handle (2) includes a clutch trigger (21), the clutch trigger (21) is located on one side of the driving clutch (4), a rotating shaft (22) is provided in the middle of the clutch trigger (21) and is rotatably connected to the driving handle (2), and a pushing protrusion (23) is provided at the front of the top end of the clutch trigger (21), and the pushing protrusion (23) corresponds to the separation protrusion (45).

9. The dual-clutch overload protection electric stapler according to claim 8, characterized in that: The drive assembly (3) further comprises a drive motor (7), the drive motor (7) being located in the drive handle (2), the output end of the drive motor (7) being provided with a shaft (71), the end of the shaft (71) being provided with a drive screw (72), and the teeth at the bottom of the drive rack (31) being matched.

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