Manual reset mechanism and anastomosis device with manual reset mechanism

Abstract

The present invention relates to the field of stapler technology, and in particular to a manual reset mechanism and a stapler with a manual reset mechanism. The manual reset mechanism includes a lower splint, a retracting gear shaft is provided in the lower splint, a rotating sleeve and a retracting gear are mounted on the retracting gear shaft, the upper portion of the retracting gear is mounted on the lower portion of the rotating sleeve, and the retracting gear and the rotating sleeve can synchronously slide up and down and rotate along the retracting gear shaft; a lifting block is provided below the retracting gear, and the lifting block is threadedly engaged with the retracting gear shaft, the upper end of the retracting gear shaft is the driving end, and the retracting gear shaft drives the lifting block to slide up and down, and when the lifting block moves upward to the retracting gear position, it drives the retracting gear and the rotating sleeve to be lifted synchronously until the retracting gear is disengaged from the meshing connection with the driving gear. The present invention can manually release the blocking condition of the retracting gear and the driving gear, so that the rack can be manually reset, thereby ensuring the normal use of the stapler.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and in particular to a manual resetting mechanism and a stapler with the manual resetting mechanism. Background Art

[0002] In the prior art, the stapler uses a motor to drive the lead screw to rotate, thereby driving the cutting knife to cut human tissue, while the stapler assembly at the front end sutures the retained human tissue. Since the cutting depth of human tissue is relatively thick, the motor-driven lead screw transmission will bring about a large torsional force during cutting and suturing, causing the stapler's drive motor to reach the set stall current value, ultimately causing the stapler to stall. At this time, the rack connected to the firing rod must be manually pulled back to the origin position through the manual reset device. In this case, the retracting gear and rack inside the stapler that are meshed with the motor drive gear are in a locked state due to the momentary stall. The retracting gear cannot be disengaged from the locked state of the drive gear through the spring device, which ultimately makes it impossible to manually reset the rack, affecting the normal use of the stapler. Summary of the Invention

[0003] In response to the shortcomings of the above-mentioned existing production technology, the present application provides a manual reset mechanism and a stapler with a manual reset mechanism, which can manually release the blockage of the retracting gear and the driving gear, so that the rack can be manually reset to ensure the normal use of the stapler.

[0004] The technical solutions adopted in the present invention are as follows:

[0005] A manual reset mechanism comprises a lower clamping plate, a driving motor is fixed to the lower portion of the lower clamping plate, an output end of the driving motor is connected to a driving gear, a retracting gear shaft is provided in the lower clamping plate, a rotating sleeve and a retracting gear are mounted on the retracting gear shaft, the driving gear is meshed with the lower portion of the retracting gear, a rack is horizontally provided in the lower clamping plate, and the rack is meshed with the upper portion of the retracting gear;

[0006] The upper part of the retract gear is mounted on the lower part of the rotating sleeve, and the retract gear and the rotating sleeve can slide up and down and rotate synchronously along the retract gear shaft; a lifting block is provided under the retract gear, and the lifting block is engaged with the retract gear shaft through a thread, and the upper end of the retract gear shaft is the driving end, and the retract gear shaft drives the lifting block to slide up and down. When the lifting block moves upward to the retract gear position, it drives the retract gear and the rotating sleeve to lift synchronously until the retract gear is disengaged from the meshing connection with the driving gear.

[0007] Furthermore, an inner hole that passes through the upper and lower parts is set at the center position of the inner part of the rotating sleeve, the upper end of the inner hole is the tool withdrawal hole, and the tool withdrawal hole is cooperated and connected with the tool withdrawal shaft that can be inserted into the tool withdrawal hole. The lower end of the tool withdrawal shaft is connected to the lifting shaft, and the lifting inner hole is set at the lower end of the lifting shaft. A lifting joint is set at the driving end of the tool withdrawal gear shaft, and the lifting inner hole and the lifting joint can be cooperated and connected.

[0008] Furthermore, the upper end of the retracting shaft is connected to a handle, which is an arc-shaped structure, and has two gripping grooves on the lower end surface of the handle.

[0009] Furthermore, a bushing is mounted on the outer surface of the rotating sleeve, a limit groove is arranged on the outer surface of the bushing, a circle of limit ring grooves is arranged on the outer surface of the rotating sleeve along the circumferential direction, the limit ring groove and the limit groove are connected inside and outside, a torsion spring fixing bolt is connected to the lower splint, a torsion spring is mounted on the torsion spring fixing bolt, a limit block is arranged on one side of the torsion spring, and the limit block is pressed against the side of the bushing by the torsion spring. When the bushing moves up and down to the limit block, the limit block can enter the limit groove and the limit ring groove to prevent the bushing and the rotating sleeve from moving up and down.

[0010] Furthermore, a first protruding limiting rib is provided axially on the outer surface of the bushing, a bushing mounting hole is provided on the lower splint, the bushing is fitted and connected in the bushing mounting hole and can slide up and down along the bushing mounting hole, and the first limiting rib can prevent the bushing from rotating.

[0011] Furthermore, a protruding second limiting rib is provided along the circumferential direction at the lower end of the outer surface of the bushing. The diameter of the second limiting rib is larger than the diameter of the bushing mounting hole. The second limiting rib can prevent the bushing from escaping upward from the bushing mounting hole.

[0012] Furthermore, the lower end of the retracting gear shaft is sleeved on the upper part of the support shaft, the retracting gear shaft can rotate relative to the support shaft, and the lower part of the support shaft is fixed to the lower part of the lower clamping plate.

[0013] Furthermore, a lifting spring is mounted on the retracting gear shaft, the upper end of the lifting spring contacts the lower end surface of the retracting gear, the lower end of the lifting spring contacts the upper end surface of the lifting block, and a recessed spring accommodating cavity is provided at the center of the lower end surface of the retracting gear, and the spring accommodating cavity can accommodate the upper end of the lifting spring to extend therein.

[0014] Furthermore, a limiting slide groove is set in the vertical direction in the lower splint, and a limiting slider is set on one side of the lifting block. The limiting slider is located in the limiting slide groove and can slide up and down along the limiting slide groove. The limiting slide groove can prevent the limiting slider from rotating in the horizontal plane.

[0015] A stapler with a manual reset mechanism comprises a manual reset mechanism which is arranged in a stapler housing.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention can manually operate to release the blockage of the retracting gear and the driving gear, so that the rack can be manually reset, ensuring the normal use of the anastomosis device; the retracting gear lifting and rack reset operations of the present invention are both operated by the same manual retracting handle, which improves work efficiency; the present invention limits the up and down movement of the bushing and the rotating sleeve by engaging the limit block in the limit groove and the limit ring groove, ensuring that the manual retracting operation is in place and improving the reliability of the manual retracting operation; the spring sleeved on the retracting gear shaft of the present invention can apply upward pressure to the retracting gear and the rotating sleeve, ensuring that the retracting gear, the rotating sleeve and the bushing will not fall and contact the driving gear due to their own gravity, making the retracting operation more convenient and more labor-saving; the present invention is provided with a hook deformation groove, which can accommodate the compressive deformation of the elastic hook; the bushing of the present invention is provided with a first limiting rib, which can prevent the bushing from rotating with the rotating sleeve, ensuring smooth manual retracting; the bushing of the present invention is provided with a second limiting rib, which can prevent the bushing from escaping from the bushing mounting hole upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the present invention.

[0019] Figure 2 This is the structural diagram of the present invention after removing the lower splint

[0020] Figure 3 This is an assembly diagram of the retracting gear shaft, bushing, rotating sleeve and retracting gear of the present invention.

[0021] Figure 4 for Figure 3 Half-section view.

[0022] Figure 5 This is a structural diagram of the assembly of the tool retraction gear shaft and the lifting block of the present invention.

[0023] Figure 6 This is a structural diagram of the manual knife retraction handle of the present invention.

[0024] Figure 7 For the lifting shaft and FIG. of the present invention.

[0025] Figure 8 This is a schematic diagram of the cooperation between the retracting gear shaft and the lifting block of the present invention.

[0026] Among them: 1. Lower clamping plate; 2. Rack; 3. Drive motor; 4. Drive gear; 5. Retract gear; 6. Motor mounting plate; 7. Lifting block; 8. Retract gear shaft; 9. Lifting spring; 10. Bushing; 11. Rotating sleeve; 12. Support shaft; 13. Limiting shoulder; 14. Limiting step; 15. Lifting joint; 17. Lifting shaft; 18. Lifting inner hole; 19. Retract shaft; 20. Handle; 21. Retract hole; 22. First limiting rib; 23. Second limiting rib; 24. Limiting groove; 25. Torsion spring fixing bolt; 26. Torsion spring; 27. Slot; 28. Limiting slide groove; 29. Limiting slider; 30. Limiting ring groove. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, a manual reset mechanism includes a lower clamping plate 1, in which a tool retraction gear shaft 8 is vertically arranged. Figure 3 and Figure 4 As shown, the retracting gear shaft 8 is fitted with a rotating sleeve 11 and the retracting gear 5. The rotating sleeve 11 is located above the retracting gear 5. The upper part of the retracting gear 5 is fitted on the lower part of the rotating sleeve 11. The retracting gear 5 and the rotating sleeve 11 can slide up and down and rotate synchronously along the retracting gear shaft 8.

[0029] like Figure 1 and Figure 2 As shown, the lower portion of the lower clamping plate 1 is detachably connected to the motor mounting plate 6 via bolts. The drive motor 3 is vertically fixed to the motor mounting plate 6. The output end of the drive motor 3 is connected to the drive gear 4, which is meshed with the lower portion of the retracting gear 5. A rack 2 is horizontally arranged within the lower clamping plate 1, and the rack 2 is meshed with the upper portion of the retracting gear 5.

[0030] like Figure 1 and Figure 2 As shown, the lower end of the retracting gear shaft 8 is sleeved with the upper part of the support shaft 12, and the retracting gear shaft 8 can rotate relative to the support shaft 12. The lower part of the support shaft 12 is fixed to the motor mounting plate 6. A limit shoulder 13 is provided at the lower end of the retracting gear shaft 8. The lower end surface of the limit shoulder 13 contacts the upper end surface of the motor mounting plate 6 to form a limit for the installation of the retracting gear shaft 8.

[0031] like Figure 3 、 Figure 4 and Figure 5As shown, a lifting block 7 is disposed below the retracting gear 5 and is mounted on the retracting gear shaft 8. A threaded hole is provided within the lifting block 7, and a threaded section is provided on the retracting gear shaft 8, threadedly engaging the lifting block 7 and the retracting gear shaft 8. The upper end of the retracting gear shaft 8 serves as the driving end. When the retracting gear shaft 8 is driven by the driving end, it drives the lifting block 7 to slide up and down. When the lifting block 7 moves upward to the position of the retracting gear 5, it drives the retracting gear 5 and the rotating sleeve 11 to rise synchronously until the retracting gear 5 disengages from the driving gear 4.

[0032] like Figure 3 and Figure 4 As shown, a lifting spring 9 is mounted on the retracting gear shaft 8. The upper end of the lifting spring 9 contacts the lower end surface of the retracting gear 5, and the lower end of the lifting spring 9 contacts the upper end surface of the lifting block 7. After the retracting gear 5 is disengaged from the driving gear 4, the lifting spring 9 will always apply upward pressure to the retracting gear 5, ensuring that the retracting gear 5, the rotating sleeve 11, and the bushing 10 will not fall due to their own weight and contact the driving gear 4.

[0033] like Figure 4 As shown, a recessed spring accommodating cavity is provided at the center of the lower end surface of the retracting gear 5, which can accommodate the upper end of the lifting spring 9. An upwardly protruding limiting step 14 is provided on the edge of the upper end surface of the lifting stopper 7, which forms a limit when the limiting step 14 contacts the lower end surface of the retracting gear 5.

[0034] like Figure 7 As shown, the rotating sleeve 11 has a central inner hole extending vertically therethrough. The upper end of the inner hole is a tool withdrawal hole 21, and the cross-section of the tool withdrawal hole 21 is square. The tool withdrawal hole 21 is connected to the tool withdrawal shaft 19, which can extend into the tool withdrawal hole 21. The tool withdrawal shaft 19 has a square cross-section and can drive the rotating sleeve 11 and the tool withdrawal gear 5 to rotate synchronously.

[0035] like Figure 6 As shown, the lower end of the retracting shaft 19 is connected to the lifting shaft 17. The lower end of the lifting shaft 17 is provided with a lifting inner hole 18, and the cross-sectional shape of the lifting inner hole 18 is a regular hexagon. The driving end of the retracting gear shaft 8 is provided with a lifting joint 15, and the cross-sectional shape of the lifting joint 15 is a regular hexagon. The lifting inner hole 18 and the lifting joint 15 can be connected in a mating manner.

[0036] like Figure 6As shown, the upper end of the retract shaft 19 is connected to the handle 20. Since the cross-sectional area of the retract shaft 19 is relatively small, it is inconvenient for the operator to rotate the retract shaft 19. The handle 20 is an arc-shaped structure, and there are two gripping grooves on the lower end surface of the handle 20. The cross-sectional area of the handle 20 is much larger than the retract shaft 19. The operator can press two fingers against the gripping grooves, and then use the handle 20 to easily drive the retract shaft 19 to rotate, thereby achieving the retracting action. When the handle 20 is rotated, the lifting shaft 17 can drive the retract gear shaft 8 to rotate, and the rotation of the retract gear shaft 8 drives the lifting block 7 threadedly connected thereto to move upward. The lifting block 7 moves upward and touches the retract gear 5, thereby driving the retract gear 5 and the rotating sleeve 11 to move upward as well, until the retract gear 5 is disengaged from the drive gear 4, thereby escaping from the blocked state.

[0037] like Figure 7 and Figure 8 As shown, a limiting groove 28 is set in the vertical direction in the lower splint 1, and a limiting slider 29 is set on one side of the lifting block 7. The limiting slider 29 is located in the limiting groove 28 and can slide up and down along the limiting groove 28. The limiting groove 28 can prevent the limiting slider 29 from rotating in the horizontal plane.

[0038] like Figure 3 and Figure 4 As shown, the outer surface of the rotating sleeve 11 is sleeved with the bushing 10, and a protruding first limiting rib 22 is axially arranged on the outer surface of the bushing 10. A bushing mounting hole is arranged on the lower splint 1. The bushing 10 is fitted and connected in the bushing mounting hole and can slide up and down along the bushing mounting hole. The first limiting rib 22 can prevent the rotation of the bushing. A protruding second limiting rib 23 is circumferentially arranged at the lower end of the outer surface of the bushing 10. The diameter of the second limiting rib 23 is larger than the diameter of the bushing mounting hole. The second limiting rib 23 can prevent the bushing 10 from escaping from the bushing mounting hole upward.

[0039] like Figure 4 and Figure 5 As shown, a limiting groove 24 is provided on the outer surface of the bushing 10, and a limiting ring groove 30 is provided along the circumferential direction on the outer surface of the rotating sleeve 11. The limiting ring groove 30 and the limiting groove 24 are connected internally and externally. A torsion spring fixing bolt 25 is connected to the lower clamping plate 1, and a torsion spring 26 is mounted on the torsion spring fixing bolt 25. A limiting block 27 is provided on one side of the torsion spring 26. The limiting block 27 is pressed against the side of the bushing 10 by the torsion spring 26. When the bushing 10 moves up and down to the limiting block 27, the limiting block 27 can enter the limiting groove 24 and the limiting ring groove 30, blocking the bushing 10 and the rotating sleeve 11 from moving up and down, thereby limiting the position of the bushing 8 and the rotating sleeve 11. When the bushing 10 and the rotating sleeve 11 move up to the position where the limiting groove 24, the limiting ring groove 30 and the limiting block 27 cooperate, the drive gear 4 disengages from the retracting gear 5.

[0040] like Figure 5As shown, a slot 27 is provided on the side of the limit stopper 27 facing the torsion spring 26 , and one end of the torsion spring 26 can fit in the slot 27 .

[0041] A stapler with a manual reset mechanism comprises the above-mentioned manual reset mechanism, and the manual reset mechanism is arranged in the stapler housing.

[0042] The working principle of the present invention is as follows: when the stapler is stuck during operation, the retracting gear 5 and the rack 2 are in a locked state, and the lower half of the retracting gear 5 cannot be separated from the drive gear 4 by the lifting spring 9. At this time, the lifting inner hole 18 at the bottom of the manual retracting handle 16 can be inserted into the lifting joint 15 at the top of the retracting gear shaft 8, and the manual retracting handle 16 is rotated clockwise. Since the lifting block 7 and the retracting gear shaft 8 are connected by a similar screw rod, the rotation of the retracting gear shaft 8 will drive the lifting block 7 to move upward. When the lifting block 7 moves upward, it will touch the retracting gear 5, thereby driving the retracting gear 5, the rotating sleeve 11 and the bushing 10 to move upward as well, until the retracting gear 5 is separated from the drive gear 4. At this time, the limit block 27 can enter the limit groove 24 and the limit ring groove 30, thereby limiting the bushing 8 and the rotating sleeve 11. Due to the action of the lifting spring 9, after the retracting gear 5 is separated from the driving gear 4, it will always exert an upward pressure on the retracting gear 5, ensuring that the retracting gear 5, the rotating sleeve 11 and the bushing 10 will not fall due to their own gravity and contact the driving gear 4. After the retracting gear 5 is separated from the driving gear 4, the retracting shaft 19 of the manual retracting handle 16 cooperates with the retracting hole 21 of the rotating sleeve 11. The manual retracting handle 16 is rotated counterclockwise, driving the retracting gear 5 to bring the rack 2 back to the original position, completing the retracting operation.

[0043] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A manual resetting mechanism for a stapler, comprising a lower clamping plate, a drive motor fixed to the lower portion of the lower clamping plate, an output end of the drive motor connected to a drive gear, characterized in that: A retracting gear shaft is provided in the lower clamping plate, a rotating sleeve and a retracting gear are mounted on the retracting gear shaft, the driving gear is meshed with the lower portion of the retracting gear, a rack is horizontally provided in the lower clamping plate, and the rack is meshed with the upper portion of the retracting gear; The upper part of the retract gear is sleeved on the lower part of the rotating sleeve, and the retract gear and the rotating sleeve can slide up and down and rotate synchronously along the retract gear shaft; a lifting block is provided under the retract gear, and the lifting block is matched with the retract gear shaft through a thread, and the upper end of the retract gear shaft is the driving end, and the retract gear shaft drives the lifting block to slide up and down, and when the lifting block moves upward to the retract gear position, it drives the retract gear and the rotating sleeve to lift synchronously until the retract gear is disengaged from the meshing connection with the driving gear; an inner hole that passes through the upper and lower parts is provided at the center position of the inner part of the rotating sleeve, and the upper end of the inner hole is the retract hole, and the retract hole is matched with the retract shaft that can be inserted into the retract hole. The lower end of the retract shaft is connected to the lifting shaft, and a lifting inner hole is provided at the lower end of the lifting shaft. A lifting joint is provided at the driving end of the retract gear shaft, and the lifting inner hole and the lifting joint can be matched and connected.

2. The manual resetting mechanism of the stapler according to claim 1, characterized in that: The upper end of the tool retraction shaft is connected to a handle, which is an arc-shaped structure, and the lower end surface of the handle is provided with two gripping grooves.

3. The manual resetting mechanism of the stapler according to claim 1, characterized in that: The outer surface of the rotating sleeve is fitted with a bushing, a limit groove is provided on the outer surface of the bushing, a circle of limit ring grooves is provided on the outer surface of the rotating sleeve along the circumferential direction, the limit ring groove and the limit groove are connected inside and outside, a torsion spring fixing bolt is connected to the lower splint, a torsion spring is fitted on the torsion spring fixing bolt, a limit block is provided on one side of the torsion spring, and the limit block is pressed against the side of the bushing by the torsion spring. When the bushing moves up and down to the limit block, the limit block can enter the limit groove and the limit ring groove to prevent the bushing and the rotating sleeve from moving up and down.

4. The manual resetting mechanism of the stapler according to claim 3, characterized in that: A first limiting rib protruding along the axial direction is provided on the outer surface of the bushing, a bushing mounting hole is provided on the lower splint, the bushing is fitted and connected in the bushing mounting hole and can slide up and down along the bushing mounting hole, and the first limiting rib can prevent the bushing from rotating.

5. The manual resetting mechanism of the stapler according to claim 4, characterized in that: A protruding second limiting rib is provided at the lower end of the outer surface of the bushing along the circumferential direction. The diameter of the second limiting rib is larger than the diameter of the bushing mounting hole. The second limiting rib can prevent the bushing from escaping from the bushing mounting hole upward.

6. The manual resetting mechanism of the stapler according to claim 1, characterized in that: The lower end of the retracting gear shaft is sleeved on the upper part of the support shaft. The retracting gear shaft can rotate relative to the support shaft. The lower part of the support shaft is fixed to the lower part of the lower clamping plate.

7. The manual resetting mechanism of the stapler according to claim 6, characterized in that: A lifting spring is mounted on the retracting gear shaft, the upper end of the lifting spring contacts the lower end surface of the retracting gear, and the lower end of the lifting spring contacts the upper end surface of the lifting block. A recessed spring accommodating cavity is provided at the center of the lower end surface of the retracting gear, and the spring accommodating cavity can accommodate the upper end of the lifting spring.

8. The manual resetting mechanism of the stapler according to claim 1, characterized in that: A limiting slide is provided in the lower splint along the vertical direction, and a limiting slider is provided on one side of the lifting block. The limiting slider is located in the limiting slide and can slide up and down along the limiting slide. The limiting slide can prevent the limiting slider from rotating in the horizontal plane.

9. A stapler with a manual reset mechanism, characterized in that: The invention comprises a manual reset mechanism of a stapler according to any one of claims 1 to 8, wherein the manual reset mechanism of the stapler is arranged in a stapler housing.

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