Manually closed electric laparoscopic stapler with manual reset mechanism

Abstract

The present invention discloses a manually closed electric laparoscopic stapler with a manual reset mechanism, wherein the manual reset mechanism includes a drive assembly arranged on an external body and a reset gear assembly coordinated with the drive assembly; the drive assembly composed of a reset shaft, a circular plate, a supporting compression spring, a first spline and a second spline is used to ensure that the upper reset gear in the reset gear assembly can still rotate when the lower reset gear stops rotating, thereby achieving the purpose of improving the reset convenience of the stapler and ensuring the safety of the use of the stapler.

Description

Technical Field

[0001] The present invention relates to the production and application field of staplers, and in particular to a manually closed electric laparoscopic stapler with a manual reset mechanism. Background Art

[0002] Laparoscopic cutting and staplers are currently widely used in surgical procedures. They offer numerous advantages, including minimal incision and rapid postoperative recovery. Laparoscopic cutting and staplers are equipped with a manual blade retraction mechanism to reposition the blade in the event of instrument failure.

[0003] Since the electric laparoscopic cutting stapler introduces a drive motor, and the motor has a relatively large deceleration ratio, if the transmission connection between the motor output gear and the rack is not cut off, the rack cannot drive the cutting knife to reset under the action of external force. The patent (patent number: CN105997171B) provides a manual reset structure and a stapler with this structure, which uses the working mode of the upper and lower reset gears to achieve manual knife retraction. However, when the device is working normally, only the lower reset gear is engaged with the motor output gear and the rack respectively. When the transmission needs to be cut off, the upper reset gear needs to be pressed down to achieve the engagement of the upper reset gear with the motor, but not with the motor output gear. During the process of pressing the upper reset gear down, the lower reset gear disengages from the motor output gear and the rack. Since the upper reset gear does not mesh with the rack during normal operation, the upper reset gear easily interferes with the rack when pressed down, and is not easy to press down, making manual reset impossible.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention proposes a manually closed electric laparoscopic stapler with a manual reset mechanism, so as to achieve the purpose of improving the resetting convenience of the stapler and ensuring the safety of the use of the stapler.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A manually closed electric laparoscopic stapler with a manual reset mechanism, the manual reset mechanism comprising a drive assembly arranged on an external body and a reset gear assembly matched with the drive assembly;

[0008] The driving assembly includes a reset gear shaft, and the reset gear shaft includes a reset shaft, a circular plate provided at the top of the reset shaft, a support compression spring sleeved on the reset shaft, a group of first splines provided on the reset shaft, and a group of second splines provided on the reset shaft, wherein the first splines are located above the second splines, and the first splines are arranged circumferentially on the side wall of the reset shaft, and the second splines are also arranged circumferentially on the side wall of the reset shaft;

[0009] The reset gear assembly includes an upper reset gear arranged on the external body and a lower reset gear arranged on the external body, the inner side wall of the central through hole of the upper reset gear is provided with a first keyway matching the first spline; the inner wall of the central through hole of the lower reset gear is provided with a second keyway matching the second spline; the supporting compression spring is located between the circular plate and the upper reset gear, the first keyway passes through the upper and lower surfaces of the upper reset gear, and the second keyway passes through the upper and lower surfaces of the lower reset gear.

[0010] The present invention uses a driving assembly consisting of a reset shaft, a circular plate, a supporting compression spring, a first spline and a second spline to ensure that the upper reset gear can still rotate when the lower reset gear in the reset gear assembly stops, thereby improving the resetting convenience of the anastomosis device and ensuring the safety of the use of the anastomosis device.

[0011] Preferably, a partition is provided between the upper reset gear and the lower reset gear, and the partition is mounted on the external frame. The partition prevents the reset gear from driving the upper reset gear downward during the downward pressing process, thereby further ensuring the quality of the stapler.

[0012] Preferably, a groove is provided in the center of the partition, and the groove width is equal to the diameter of the reset shaft. By providing a groove in the center of the partition with the same diameter as the reset shaft, the downward position of the reset shaft is limited.

[0013] Preferably, in the initial state, the first spline is located at the upper surface of the first keyway close to the upper reset gear, and the second spline is located at the lower surface of the second keyway close to the lower reset gear.

[0014] The present invention has the following advantages:

[0015] 1. The present invention uses a drive assembly consisting of a reset shaft, a circular plate, a supporting compression spring, a first spline and a second spline to ensure that the upper reset gear can still rotate when the lower reset gear in the reset gear assembly stops, thereby improving the resetting convenience of the anastomosis device and ensuring the safety of the use of the anastomosis device.

[0016] 2. The present invention uses a partition to prevent the reset gear from driving the upper reset gear downward during the downward pressing process, thereby further ensuring the quality of the anastomosis device.

[0017] 3. The present invention sets a groove with a diameter equal to that of the reset shaft at the center of the partition to limit the downward movement position of the reset shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0019] Figure 1 This is a schematic structural diagram of a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of a manual reset mechanism in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of a reset shaft in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0022] Figure 4 This is a top view of an upper reset gear in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0023] Figure 5 This is a structural schematic diagram of a diaphragm in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0024] Figure 6 A cross-sectional schematic diagram of a manual reset mechanism in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention, showing a first usage state;

[0025] Figure 7 A cross-sectional schematic diagram of a second usage state of a manual reset mechanism in a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in an embodiment of the present invention;

[0026] The numbers and letters in the figure represent the corresponding component names:

[0027] 1. Drive assembly 11. Reset shaft 12. Circular plate 13. Support spring 14. First spline

[0028] 15. Second spline 2. Reset gear assembly 21. Upper reset gear 22. Lower reset gear

[0029] 211. First keyway 3. Partition 31. Groove 4. External body. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] The present invention provides a manually closed electric laparoscopic stapler with a manual reset mechanism. Its working principle is to realize that the upper reset gear can still rotate when the lower reset gear in the reset gear assembly stops rotating through a drive assembly composed of a reset shaft, a circular plate, a supporting compression spring, a first spline and a second spline, thereby improving the reset convenience of the stapler and ensuring the safety of the use of the stapler.

[0032] The present invention will be further described in detail below with reference to examples and specific implementation methods.

[0033] like Figure 1 and Figure 2 As shown, a manually closed electric laparoscopic stapler with a manual reset mechanism comprises a drive assembly 1 provided on an external body and a reset gear assembly 2 matched with the drive assembly;

[0034] Combine Figure 3 As shown, the drive assembly includes a reset gear shaft, and the reset gear shaft includes a reset shaft 11, a circular plate 12 provided at the top of the reset shaft, a support compression spring 13 sleeved on the reset shaft, a group of first splines 14 provided on the reset shaft, and a group of second splines 15 provided on the reset shaft, wherein the first splines are located above the second splines, and the first splines are arranged circumferentially on the side wall of the reset shaft, and the second splines are also arranged circumferentially on the side wall of the reset shaft;

[0035] Combine Figure 4 As shown, the reset gear assembly includes an upper reset gear 21 provided on the external body and a lower reset gear 22 provided on the external body, the inner side wall of the central through hole of the upper reset gear is provided with a first keyway 211 that cooperates with the first spline; the inner wall of the central through hole of the lower reset gear is provided with a second keyway (not shown) that cooperates with the second spline; the supporting compression spring is located between the circular plate and the upper reset gear, the first keyway passes through the upper and lower surfaces of the upper reset gear, and the second keyway passes through the upper and lower surfaces of the lower reset gear; in the initial state, the first spline is located at the first keyway close to the upper surface of the upper reset gear, and the second spline is located at the second keyway close to the lower surface of the lower reset gear.

[0036] A partition plate 3 (such as Figure 5 ), the partition is installed on the external frame, and a groove 31 is provided in the center of the partition, and the groove width is equal to the diameter of the reset shaft.

[0037] The specific use steps of the present invention are as follows: Figure 6 As shown, when the jaws of the electric stapler are in a closed state, due to the large reduction ratio of the driving mechanism inside the stapler, when its motor stops, it cannot be rotated by external force. Under the action of the supporting compression spring 13, the first spline 14 is in the first keyway 211, and the second spline 15 is in the second keyway.

[0038] When the reset shaft is pressed, the first spline is still in the first keyway, and the second spline is separated from the second keyway. At this time, the reset shaft is rotated, and the reset shaft only drives the upper reset gear 21 to rotate and drives the transmission rack to reset. During this process, the lower reset gear remains stationary, thereby realizing the manual reset process.

[0039] In actual operation, the presence of the partition can prevent the upper reset gear from moving downward with the reset shaft. At the same time, the groove 31 set on the partition is used to limit the downward pressure distance of the reset shaft to prevent the first spline from separating from the first keyway.

[0040] Through the above method, the present invention provides a manually closed electric laparoscopic stapler with a manual reset mechanism, which realizes that the upper reset gear can still rotate when the lower reset gear in the reset gear assembly stops rotating through a drive assembly composed of a reset shaft, a circular plate, a supporting compression spring, a first spline and a second spline, thereby achieving the purpose of improving the reset convenience of the stapler and ensuring the safety of the use of the stapler.

[0041] The above is only a preferred embodiment of a manually closed electric laparoscopic stapler with a manual reset mechanism disclosed in the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A manually closed electric laparoscopic stapler with a manual reset mechanism, characterized in that: The manual reset mechanism includes a driving assembly arranged on an external body and a reset gear assembly matched with the driving assembly; The driving assembly includes a reset gear shaft, and the reset gear shaft includes a reset shaft, a circular plate provided at the top of the reset shaft, a support compression spring sleeved on the reset shaft, a group of first splines provided on the reset shaft, and a group of second splines provided on the reset shaft, wherein the first splines are located above the second splines, and the first splines are arranged circumferentially on the side wall of the reset shaft, and the second splines are also arranged circumferentially on the side wall of the reset shaft; The reset gear assembly includes an upper reset gear provided on the external body and a lower reset gear provided on the external body, the inner side wall of the central through hole of the upper reset gear is provided with a first keyway that cooperates with the first spline; the inner wall of the central through hole of the lower reset gear is provided with a second keyway that cooperates with the second spline; the supporting compression spring is located between the circular plate and the upper reset gear, the first keyway passes through the upper and lower surfaces of the upper reset gear, and the second keyway passes through the upper and lower surfaces of the lower reset gear; When the reset shaft is pressed, the first spline is still in the first keyway, and the second spline is separated from the second keyway. At this time, the reset shaft is rotated, and the reset shaft only drives the upper reset gear to rotate, and drives the transmission rack to reset; In an initial state, the first spline is located at the upper surface of the first keyway close to the upper reset gear, and the second spline is located at the lower surface of the second keyway close to the lower reset gear.

2. A manually closed electric laparoscopic stapler with a manual reset mechanism according to claim 1, characterized in that: A partition is further provided between the upper reset gear and the lower reset gear, and the partition is mounted on the external frame.

3. A manually closed electric laparoscopic stapler with a manual reset mechanism according to claim 2, characterized in that: A groove is provided at the center of the partition, and the groove width is equal to the diameter of the reset shaft.

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