Manual reset mechanism and anastomat with same

Abstract

The invention relates to the technical field of anastomats, in particular to a manual reset mechanism and an anastomat with the manual reset mechanism. The manual reset mechanism comprises a lower clamping plate, a tool retracting gear shaft is arranged in the lower clamping plate and sleeved with a rotating sleeve and a tool retracting gear, the lower portion of the rotating sleeve is sleeved with the upper portion of the tool retracting gear, and the tool retracting gear and the rotating sleeve can synchronously slide up and down and rotate along the tool retracting gear shaft. A lifting check block is arranged below the tool retracting gear and matched with a tool retracting gear shaft through threads, the upper end of the tool retracting gear shaft is a driving end, the tool retracting gear shaft drives the lifting check block to slide up and down, and when the lifting check block moves upwards to the position of the tool retracting gear, the tool retracting gear and the rotating sleeve are driven to be lifted synchronously. And the tool retracting gear is separated from the meshing connection with the driving gear. The blocking condition of the retracting gear and the driving gear can be relieved through manual operation, so that the rack can be manually reset, and normal use of the anastomat is guaranteed.

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 drives the lead screw to rotate through a motor, 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 a large torsional force during cutting and suturing, causing the drive motor of the stapler to reach the set stall current value, and eventually 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 a manual reset device. In this case, the retracting gear and the rack that are meshed with the motor drive gear inside the stapler are in a locked state due to the momentary jam, and the retracting gear cannot be disengaged from the locked state of the drive gear through the spring device, which ultimately results in the inability to manually reset the rack, affecting the normal use of the stapler. Summary of the invention

[0003] In view of the shortcomings in 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 operate to 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 solution adopted by the present invention is as follows: A manual reset mechanism comprises a lower clamping plate, a driving motor is fixed at the lower part of the lower clamping plate, an output end of the driving motor is connected to a driving gear, a retracting gear shaft is arranged in the lower clamping plate, a rotating sleeve and a retracting gear are mounted on the retracting gear shaft, the driving gear is meshed and connected with the lower part of the retracting gear, a rack is horizontally arranged in the lower clamping plate, and the rack is meshed and connected with the upper part of the retracting gear; The upper part of the retracting gear is sleeved on the lower part of the rotating sleeve, and the retracting gear and the rotating sleeve can slide up and down and rotate synchronously along the retracting gear shaft; a lifting block is arranged under the retracting gear, and the lifting block is matched with the retracting gear shaft through a thread, and 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.

[0005] Furthermore, an inner hole which passes through from top to bottom is arranged at the inner center position of the rotating sleeve, the upper end of the inner hole is a tool withdrawal hole, the tool withdrawal hole is cooperatively connected with a tool withdrawal shaft which can be inserted into the tool withdrawal hole, the lower end of the tool withdrawal shaft is connected to a lifting shaft, a lifting inner hole is arranged at the lower end of the lifting shaft, a lifting joint is arranged at the driving end of the tool withdrawal gear shaft, and the lifting inner hole and the lifting joint can be cooperatively connected.

[0006] Furthermore, the upper end of the knife retracting shaft is connected to a handle, the handle is an arc-shaped structure, and the lower end surface of the handle is provided with two gripping grooves.

[0007] 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 clamping plate, 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 surface 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.

[0008] Furthermore, a first protruding limiting rib is axially arranged on the outer surface of the bushing, a bushing mounting hole is arranged on the lower clamping plate, 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.

[0009] 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, and the second limiting rib can prevent the bushing from escaping upward from the bushing mounting hole.

[0010] Furthermore, the lower end of the retracting gear shaft is sleeved on the upper part of the supporting shaft, the retracting gear shaft can rotate relative to the supporting shaft, and the lower part of the supporting shaft is fixed to the lower part of the lower clamping plate.

[0011] 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 arranged 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.

[0012] Furthermore, a limiting slide groove is arranged in the vertical direction in the lower clamping plate, and a limiting slider is arranged 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.

[0013] A stapler with a manual reset mechanism comprises a manual reset mechanism which is arranged in a stapler housing.

[0014] The beneficial effects of the present invention are as follows: The present invention can manually operate to release the blocking of the retracting gear and the driving gear, so that the rack can be manually reset to ensure the normal use of the stapler; the lifting of the retracting gear and the resetting of the rack of the present invention are both operated by the same manual retracting handle, which improves work efficiency; the present invention realizes the limitation of the up and down movement of the bushing and the rotating sleeve by the limit block being clamped into the limit groove and the limit ring groove, so as to ensure that the manual retracting operation is in place and improve the reliability of the manual retracting operation; the spring sleeved on the retracting gear shaft of the present invention can give the retracting gear and the rotating sleeve an upward pressure to ensure that the retracting gear, the rotating sleeve and the bushing will not fall and contact the driving gear due to their own gravity, so that the retracting operation is 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 to ensure 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

[0015] Figure 1 It is a stereogram of the present invention.

[0016] Figure 2 The structure diagram of the present invention after removing the lower splint Figure 3 This is an assembly structure diagram of the retracting gear shaft, bushing, rotating sleeve and retracting gear of the present invention.

[0017] Figure 4 for Figure 3 Half section view.

[0018] Figure 5 This is a structural diagram of the assembly of the tool retracting gear shaft and the lifting stopper of the present invention.

[0019] Figure 6 It is a structural diagram of the manual knife retracting handle of the present invention.

[0020] Figure 7 For the lifting shaft and FIG. of the present invention.

[0021] Figure 8 It is a schematic diagram of the cooperation between the tool retracting gear shaft and the lifting stop block of the present invention.

[0022] Among them: 1. lower clamping plate; 2. rack; 3. driving motor; 4. driving gear; 5. retracting gear; 6. motor mounting plate; 7. lifting block; 8. retracting gear shaft; 9. lifting spring; 10. bushing; 11. rotating sleeve; 12. supporting shaft; 13. limiting shoulder; 14. limiting step; 15. lifting joint; 17. lifting shaft; 18. lifting inner hole; 19. retracting shaft; 20. handle; 21. retracting 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

[0023] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, a manual reset mechanism includes a lower clamping plate 1, and a retracting gear shaft 8 is vertically arranged in the lower clamping plate 1. Figure 3 and Figure 4 As shown, the retracting gear shaft 8 is mounted with a rotating sleeve 11 and a retracting gear 5, the rotating sleeve 11 is located above the retracting gear 5, the upper part of the retracting gear 5 is mounted on the lower part of the rotating sleeve 11, and the retracting gear 5 and the rotating sleeve 11 can slide up and down and rotate synchronously along the retracting gear shaft 8.

[0025] like Figure 1 and Figure 2 As shown, the lower part of the lower clamping plate 1 is detachably connected to the motor mounting plate 6 by bolts, and the driving motor 3 is vertically fixed on the motor mounting plate 6. The output end of the driving motor 3 is connected to the driving gear 4, and the driving gear 4 is meshed and connected with the lower part of the retracting gear 5. A rack 2 is horizontally arranged in the lower clamping plate 1, and the rack 2 is meshed and connected with the upper part of the retracting gear 5.

[0026] 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, and the lower part of the support shaft 12 is fixed on the motor mounting plate 6. A limiting shoulder 13 is provided at the lower end of the retracting gear shaft 8, and the lower end surface of the limiting shoulder 13 contacts the upper end surface of the motor mounting plate 6 to limit the installation of the retracting gear shaft 8.

[0027] like Figure 3 , Figure 4 and Figure 5As shown, a lifting block 7 is arranged below the retracting gear 5, and the lifting block 7 is sleeved on the retracting gear shaft 8. A threaded hole is arranged inside the lifting block 7, and a threaded section is arranged on the retracting gear shaft 8. The lifting block 7 and the retracting gear shaft 8 are matched by threads. The upper end of the retracting gear shaft 8 is a driving end, and when the retracting gear shaft 8 is driven by the driving end to rotate, the lifting block 7 is driven to slide up and down. When the lifting block 7 moves upward to the position of the retracting gear 5, the retracting gear 5 and the rotating sleeve 11 are synchronously lifted until the retracting gear 5 is separated from the driving gear 4.

[0028] 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 stopper 7. After the retracting gear 5 is separated from the driving gear 4, the lifting spring 9 will always give the retracting gear 5 an upward pressure to ensure that the retracting gear 5, the rotating sleeve 11 and the bushing 10 will not fall and contact the driving gear 4 due to their own gravity.

[0029] like Figure 4 As shown, a concave spring accommodating cavity is provided at the center of the lower end surface of the retracting gear 5, and the spring accommodating cavity can accommodate the upper end of the lifting spring 9. An upwardly protruding limiting step 14 is provided on the upper end surface edge of the lifting stopper 7, and a limiting step 14 is formed when contacting the lower end surface of the retracting gear 5.

[0030] like Figure 7 As shown, an inner hole that passes through from top to bottom is arranged at the center of the rotating sleeve 11, and the upper end of the inner hole is a tool withdrawal hole 21, and the cross-sectional shape of the tool withdrawal hole 21 is square. The tool withdrawal hole 21 is connected with a tool withdrawal shaft 19 that can be inserted into the tool withdrawal hole 21, and the cross-sectional shape of the tool withdrawal shaft 19 is square, and the tool withdrawal shaft 19 can drive the rotating sleeve 11 and the tool withdrawal gear 5 to rotate synchronously.

[0031] like Figure 6 As shown, the lower end of the tool retracting shaft 19 is connected to the lifting shaft 17, and 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 tool 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 matched and connected.

[0032] like Figure 6As shown, the upper end of the retracting shaft 19 is connected to the handle 20. Since the cross-sectional area of ​​the retracting shaft 19 is relatively small, it is inconvenient for the operator to rotate the retracting 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 retracting shaft 19. The operator can press the gripping grooves with two fingers, and then use the handle 20 to easily drive the retracting shaft 19 to rotate to achieve the retracting action. When the handle 20 is turned, the lifting shaft 17 can drive the retracting gear shaft 8 to rotate, and the rotation of the retracting gear shaft 8 drives the lifting block 7 threadedly connected thereto to move upward. The lifting block 7 moves upward and touches the retracting gear 5, thereby driving the retracting gear 5 and the rotating sleeve 11 to move upward as well, until the retracting gear 5 is out of mesh with the driving gear 4, thereby getting out of the blocked state.

[0033] like Figure 7 and Figure 8 As shown, a limiting slide groove 28 is set in the vertical direction in the lower clamping plate 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 slide groove 28 and can slide up and down along the limiting slide groove 28. The limiting slide groove 28 can prevent the limiting slider 29 from rotating in the horizontal plane.

[0034] 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, and a bushing mounting hole is arranged on the lower clamping plate 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 stop the rotation of the bushing, and a protruding second limiting rib 23 is circumferentially arranged on 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, and the second limiting rib 23 can stop the bushing 10 from escaping upward from the bushing mounting hole.

[0035] 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 on the outer surface of the rotating sleeve 11 along the circumferential direction, and the limiting ring groove 30 and the limiting groove 24 are connected inside and outside. 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 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 driving gear 4 is disengaged from the retracting gear 5.

[0036] 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 .

[0037] A stapler with a manual reset mechanism comprises the above-mentioned manual reset mechanism, wherein the manual reset mechanism is arranged in a stapler housing.

[0038] The working principle of the present invention is as follows: when the stapler is blocked, 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 driving 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 can be 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, until the retracting gear 5 is separated from the driving gear 4. At this time, the limit block 27 can enter the limit groove 24 and the limit ring groove 30, realizing the limit of 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, an upward pressure will always be applied to the retracting gear 5, ensuring that the retracting gear 5, the rotating sleeve 11 and the bushing 10 will not fall and contact the driving gear 4 due to their own gravity. 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, and the manual retracting handle 16 is rotated counterclockwise to drive the retracting gear 5 to bring the rack 2 back to the original position, completing the retracting operation.

[0039] 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 form of modification may be made within the scope of protection of the present invention.

Claims

1. A manual reset mechanism, comprising a lower clamping plate, a driving motor is fixed at the lower part of the lower clamping plate, and an output end of the driving motor is connected to a driving gear, characterized in that: A retracting gear shaft is arranged 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 part of the retracting gear, a rack is horizontally arranged in the lower clamping plate, and the rack is meshed with the upper part of the retracting gear; The upper part of the retracting gear is sleeved on the lower part of the rotating sleeve, and the retracting gear and the rotating sleeve can slide up and down and rotate synchronously along the retracting gear shaft; a lifting block is arranged under the retracting gear, and the lifting block is matched with the retracting gear shaft through a thread, and 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.

2. A manual reset mechanism according to claim 1, characterized in that: An inner hole which passes through the upper and lower parts is arranged at the inner center position of the rotating sleeve, and the upper end of the inner hole is a tool withdrawal hole, which is cooperated and connected with a tool withdrawal shaft which can be inserted into the tool withdrawal hole, and the lower end of the tool withdrawal shaft is connected to a lifting shaft, and a lifting inner hole is arranged at the lower end of the lifting shaft, and a lifting joint is arranged at the driving end of the tool withdrawal gear shaft, and the lifting inner hole and the lifting joint can be cooperated and connected.

3. A manual reset mechanism according to claim 2, characterized in that: The upper end of the knife retracting shaft is connected to a handle, which is an arc-shaped structure, and the lower end surface of the handle is provided with two holding grooves.

4. A manual reset mechanism according to claim 1, characterized in that: The outer surface of the rotating sleeve is sleeved with a bushing, 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 clamping plate, a torsion spring is sleeved 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 surface 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.

5. A manual reset mechanism according to claim 4, characterized in that: A first protruding limiting rib is axially arranged on the outer surface of the bushing, a bushing mounting hole is arranged on the lower clamping plate, 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.

6. A manual reset mechanism according to claim 5, characterized in that: A protruding second limiting rib is arranged 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 upward from the bushing mounting hole.

7. A manual reset mechanism according to claim 1, characterized in that: The lower end of the retracting gear shaft is sleeved on the upper part of the supporting shaft, the retracting gear shaft can rotate relative to the supporting shaft, and the lower part of the supporting shaft is fixed to the lower part of the lower clamping plate.

8. A manual reset mechanism according to claim 7, 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, the lower end of the lifting spring contacts the upper end surface of the lifting block, and a recessed spring accommodating cavity is arranged 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.

9. A manual reset mechanism according to claim 1, characterized in that: A limiting slide groove is arranged in the lower clamping plate along the vertical direction, and a limiting slider is arranged 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.

10. A stapler with a manual resetting mechanism, characterized in that: It comprises a manual reset mechanism as described in any one of claims 1 to 9, wherein the manual reset mechanism is arranged in the stapler housing.

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