Automatic advancing and manual retracting mechanism of electric laparoscopic stapler

Abstract

The present invention discloses an automatic advancement and manual retraction mechanism of an electric laparoscopic stapler, comprising a support frame, a motor is installed on one side of the support frame, a screw is arranged at one end of the output shaft of the motor, a screw nut is sleeved on the outside of the screw, the screw nut and the support frame are slidably matched with each other, a clutch device is arranged on the outside of the screw, the clutch device comprises a first bevel gear slidably sleeved on the screw, the output shaft of the motor and the screw rotate synchronously through the first bevel gear, a clutch button is slidably arranged on the support frame, a clutch handle is hinged on one side of the clutch button, a flange is arranged on the outer wall of the screw, a first elastic element is sleeved on one end of the screw, the first elastic element is in contact with the flange, one end of the clutch handle is hinged to one side of the first bevel gear, and a retraction device is arranged on one side of the support frame. The present invention has the characteristics of strong practicality and smooth operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic advancing and manually retracting mechanism of an electric laparoscope stapler. Background Art

[0002] With the development of science and technology and the improvement of medical conditions, surgical operations have also developed in the direction of refinement and minimally invasiveness. In particular, with the rapid development of video technology in the past decade, minimally invasive surgery has been widely used. In minimally invasive surgery, the use of laparoscopic medical devices only requires 1-3 1.5 cm small holes in the corresponding parts of the patient to complete the resection and anastomosis of tumors, lesions and other lesions. At present, manual laparoscopic staplers are still the mainstream, and there are certain requirements for the actual operation of doctors. Improper operation will cause pulling and tearing of sutured tissues, and the incision will be subjected to different forces with different cutting speeds. Therefore, an electric stapler appeared on the market to replace the manual laparoscopic stapler, which sutures the cut tissue by advancing forward steadily and at a uniform speed; the rotational motion of its micromotor is converted into forward and backward motion through a deceleration and connection mechanism, and it will not be fast or slow when cutting and pushing the titanium nails to form. The forming force applied to the titanium nails is consistent, and the titanium nail forming state is more stable and consistent. It can reduce the problem of poor nail forming with a high probability, and effectively reduce medical accidents such as anastomotic bleeding and anastomotic leakage.

[0003] And considering the uncontrollable situations that may occur during the operation, such as power supply abnormality, micromotor failure, sensor failure and other problems, it is necessary to add a manual retraction structure to manually control the actuator to retreat and ensure the safety of the operation. Summary of the invention

[0004] The object of the present invention is to provide an automatic advancing and manual retracting mechanism for an electric laparoscopic stapler to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic advancement and manual retraction mechanism of an electric laparoscopic stapler, comprising a support frame, a motor is installed on one side of the support frame, a screw is arranged at one end of the output shaft of the motor, a screw nut is sleeved on the outside of the screw, the screw nut and the support frame are slidably matched with each other, and a clutch device is arranged on the outside of the screw.

[0006] According to the above technical solution, the clutch device includes a first bevel gear slidably mounted on the screw rod, the output shaft of the motor and the screw rod rotate synchronously through the first bevel gear, a clutch button is slidably arranged on the support frame, and a clutch handle is hinged on one side of the clutch button.

[0007] According to the above technical solution, a flange is provided on the outer wall of the screw rod, a first elastic element is sleeved on one end of the screw rod, and the first elastic element is in contact with the flange.

[0008] According to the above technical solution, one end of the clutch handle is hinged to one side of the first bevel gear.

[0009] According to the above technical solution, a retraction device is provided on one side of the support frame, and the retraction device cooperates with the first bevel gear.

[0010] According to the above technical solution, the retraction device includes a second bevel gear, which is movably installed on one side of the support frame through a rotating shaft, and a retraction handle is coaxially connected to one side of the second bevel gear, and the second bevel gear cooperates with the first bevel gear.

[0011] According to the above technical solution, one side of the retraction handle is coaxially rotatably connected to a ratchet, one side of the retraction handle is rotatably connected to a pawl via a pin shaft, the pawl contacts the outer teeth of the ratchet, and a second elastic element is installed on the other side of the retraction handle, one end of the second elastic element contacts one side of the pawl.

[0012] According to the above technical solution, a center rod is connected to one side of the screw nut, and a cutting knife is installed at one end of the center rod.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0014] (1) By providing a clutch device, the motor can drive the screw to operate when the motor is working normally, and the output shaft and the screw can be clutched when the power supply is abnormal, thereby preventing accidents.

[0015] (2) By providing components such as a clutch handle and a first bevel gear, the first bevel gear can be clutched from the output shaft by pulling the handle. During normal operation, the bevel gear can be retracted by the first elastic element to drive the screw rod to operate, and the operation is simple and fast.

[0016] (3) A retraction device is provided, and the first bevel gear in the clutch state is engaged with the second bevel gear to switch to the manual state. The retraction handle is turned to reverse the screw rod. During normal operation, the bevel gear is disengaged and the retraction handle fails, making the automatic and manual switching convenient. A pawl and a ratchet are provided so that the retraction handle can only drive the screw rod nut to retract backward, so that the device can be removed from the patient in the event of an abnormality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall front view structure of the present invention;

[0019] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention during normal operation;

[0020] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention in a clutch state;

[0021] Figure 4 It is a schematic diagram of the side structure of the retracting device of the present invention;

[0022] In the figure: 1, support frame; 2, motor; 3, center rod; 31, cutting knife; 4, clutch device; 5, retraction device; 6, screw rod; 7, screw rod nut; 41, clutch button; 42, clutch handle; 43, first bevel gear; 44, first elastic element; 51, retraction handle; 52, second bevel gear; 53, pawl; 54, second elastic element; 55, ratchet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The invention provides a technical solution: an automatic advancement and manual retraction mechanism of an electric laparoscopic stapler, comprising a support frame 1, a motor 2 is installed on one side of the support frame 1, a screw 6 is arranged at one end of the output shaft of the motor 2, a screw nut 7 is sleeved on the outside of the screw 6, the screw nut 7 and the support frame 1 slide with each other, a clutch device 4 is arranged on the outside of the screw 6, during normal operation, the motor 2 drives the screw 6 to rotate, the screw nut 7 slides, and the device extends, when the electric laparoscopic stapler is used abnormally, in order to ensure the safety of the operation and not to cause harm to the patient, the cutting knife needs to be returned to the initial state, and then the instrument is removed from the patient, the clutch device 4 acts to clutch the output shaft and the screw 6 to prevent accidents;

[0025] like Figure 2The clutch device 4 includes a first bevel gear 43 slidably sleeved on the screw rod 6. The output shaft of the motor 2 and the screw rod 6 rotate synchronously through the first bevel gear 43. A clutch button 41 is slidably provided on the support frame 1. A clutch handle 42 is hinged on one side of the clutch button 41. By pulling the clutch button 41, one end of the clutch button 41 drives the clutch handle 42 to move. The clutch handle 42 drives the first bevel gear 43 to slide, so that the first bevel gear 43 is no longer sleeved on the output shaft of the motor 2, thereby driving the first bevel gear 43 to be clutched from the output shaft;

[0026] The outer wall of the screw rod 6 is provided with a flange, and one end of the screw rod 6 is sleeved with a first elastic element 44, which contacts the flange. When working normally, the first bevel gear 43 is retracted by the first elastic element 44, and the clutch handle 42 can be released to work normally, without manually pulling back the clutch handle 42, which is more convenient to operate;

[0027] One end of the clutch handle 42 is hinged to one side of the first bevel gear 43. When normal operation is required, the clutch handle 42 only needs to be pulled back to its original position to achieve self-locking without manual clutching.

[0028] A retraction device 5 is provided on one side of the support frame 1. The retraction device 5 cooperates with the first bevel gear 43. The retraction device 5 can be manually retracted on the basis of clutch, returned to the initial position, and then the instrument is taken out;

[0029] like Figure 4 , the retraction device 5 includes a second bevel gear 52, which is movably mounted on one side of the support frame 1 through a rotating shaft, and a retraction handle 51 is coaxially connected to one side of the second bevel gear 52. The second bevel gear 52 cooperates with the first bevel gear 43. When the retraction handle 51 is rotated, the second bevel gear 52 can be driven to drive the first bevel gear 43 to move in the opposite direction. The first bevel gear 43 in the clutch state is meshed with the second bevel gear. When switched to the manual state, the retraction handle is turned to reverse the screw rod 6. When working normally, the first bevel gear 43 is disengaged and the retraction handle 51 fails, so that the automatic and manual switching is convenient;

[0030] The ratchet 55 is coaxially rotatably connected to one side of the retraction handle 51, and a pawl 53 is rotatably connected to one side of the retraction handle 51 through a pin shaft, and the pawl 53 contacts the outer teeth of the ratchet 55. A second elastic element 54 is installed on the other side of the retraction handle 51, and one end of the second elastic element 54 contacts one side of the pawl 53. When the retraction handle 51 is swung counterclockwise, the second elastic element 54 continuously releases pressure on the pawl 53, and the pawl 53 meshes with the ratchet 55 and drives the second bevel gear 52 to rotate counterclockwise; when the retraction handle 51 is swung clockwise, the pawl 53 overcomes the pressure of the second elastic element 54, moves upward, and cannot mesh with the ratchet 55. The ratchet 55 cannot rotate, so the second bevel gear 52 cannot rotate; the retraction handle 51 is continuously swung, and the bevel gear 2 continuously rotates counterclockwise, so that the retraction handle 51 can only drive the screw nut 7 to retreat backward, in order to remove the instrument from the patient in case of abnormality;

[0031] One side of the screw nut 7 is connected to the center rod 3, and one end of the center rod 3 is installed with a cutting knife 31. The movement of the screw nut 7 drives the cutting knife 31 to move to cut the patient's tissue.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic advancing and manually retracting mechanism of an electric laparoscopic stapler, comprising a support frame (1), a motor (2) being mounted on one side of the support frame (1), a screw (6) being arranged at one end of an output shaft of the motor (2), a screw nut (7) being sleeved on the outside of the screw (6), the screw nut (7) and the support frame (1) being slidably matched with each other, characterized in that: A clutch device (4) is arranged outside the screw rod (6); The clutch device (4) comprises a first bevel gear (43) slidably mounted on the screw rod (6); the output shaft of the motor (2) and the screw rod (6) rotate synchronously via the first bevel gear (43); a clutch button (41) is slidably mounted on the support frame (1); a clutch handle (42) is hingedly connected to one side of the clutch button (41); The outer wall of the screw rod (6) is provided with a flange, one end of the screw rod (6) is sleeved with a first elastic element (44), and the first elastic element (44) is in contact with the flange; One end of the clutch handle (42) is hinged to one side of the first bevel gear (43); A retraction device (5) is provided on one side of the support frame (1), and the retraction device (5) cooperates with the first bevel gear (43); The retraction device (5) comprises a second bevel gear (52), the second bevel gear (52) is movably mounted on one side of the support frame (1) via a rotating shaft, one side of the second bevel gear (52) is coaxially connected to a retraction handle (51), and the second bevel gear (52) cooperates with the first bevel gear (43).

2. The automatic advancing and manual retracting mechanism of an electric laparoscopic stapler according to claim 1, characterized in that: One side of the retraction handle (51) is coaxially rotatably connected to a ratchet (55), and one side of the retraction handle (51) is rotatably connected to a pawl (53) via a pin shaft, and the pawl (53) contacts the outer teeth of the ratchet (55). A second elastic element (54) is installed on the other side of the retraction handle (51), and one end of the second elastic element (54) contacts one side of the pawl (53).

3. The automatic advancing and manual retracting mechanism of an electric laparoscopic stapler according to claim 1, characterized in that: One side of the screw nut (7) is connected to a center rod (3), and one end of the center rod (3) is installed with a cutting knife (31).

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