Electric anastomat with manual backout mechanism

Abstract

The application discloses an electric anastomat with a manual back-off mechanism, which comprises a support, a cutting knife mechanism, a driving mechanism and a transmission mechanism connecting the driving mechanism and the cutting knife mechanism. The cutting knife mechanism comprises a cutting rack and a cutting knife assembly connected with the cutting rack. The driving mechanism comprises a driving motor and a driving gear arranged at the power output end of the driving motor. The transmission mechanism comprises a pin shaft fixedly arranged on the support and extending in the vertical direction, a transmission part sleeved on the pin shaft and limited on the upper end of the pin shaft, the transmission part comprising a positioning shaft and a gear part arranged in the up-down direction, the outer diameter of the positioning shaft being smaller than the outer diameter of the gear part, a shaft sleeve fixedly arranged on the support and sleeved above the transmission part, and an elastic part sleeved on the positioning shaft and abutting between the shaft sleeve and the gear part. The manual back-off mechanism comprises a back-off wrench and the transmission part. The back-off wrench extends to the transmission part through the shaft sleeve and is threadedly connected with the transmission part. The electric anastomat can realize manual back-off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to an electric anastomat with a manual return mechanism. BACKGROUND

[0002] As an iterative product of the traditional manual anastomat, the electric anastomat is widely used in the resection, transection and anastomosis of organs and tissues such as lungs, tracheas, stomachs and intestines in surgical operations. Compared with the manual anastomat, the electric anastomat is more labor-saving and has higher anastomosis quality.

[0003] The electric anastomat has a driving motor. When the battery fails, the cutting knife needs to be manually reset to the initial position. Before manually resetting the cutting knife, the power connection between the motor and the rack needs to be cut off. At present, various brands of anastomosis devices mainly use the method of pressing down the transmission gear to make the transmission gear and the rack disengage, so as to realize the power release on the rack, such as the manual return method of an anastomat disclosed in Chinese patent CN117137558A. The above-mentioned return method has obvious defects, that is, when the anastomat cuts thick tissues, the gear and the rack are locked, so that the transmission gear is difficult to be pressed down. SUMMARY

[0004] Based on the above problems, the present application aims to provide an electric anastomat with a manual return mechanism, which is simple in structure and convenient to operate.

[0005] In order to overcome the shortcomings of the prior art, the technical scheme provided by the present application is as follows:

[0006] The electric anastomat with a manual return mechanism comprises a support, a cutting knife mechanism, a driving mechanism for driving the cutting knife mechanism to feed or retreat, and a transmission mechanism connecting the driving mechanism and the cutting knife mechanism. The cutting knife mechanism comprises a cutting rack and a cutting knife assembly connected with the cutting rack. The driving mechanism comprises a driving motor and a driving gear arranged at the power output end of the driving motor. The transmission mechanism comprises:

[0007] A pin shaft is fixedly arranged on the support and extends in the vertical direction;

[0008] A transmission member is sleeved on the pin shaft and limited on the upper end of the pin shaft. The transmission member comprises a positioning shaft and a gear part arranged in the upper and lower directions. The outer diameter of the positioning shaft is smaller than the outer diameter of the gear part;

[0009] A shaft sleeve is fixedly arranged on the support and sleeved above the transmission member. The shaft sleeve, the transmission member and the pin shaft are coaxially arranged;

[0010] An elastic member is sleeved on the positioning shaft and abuts between the shaft sleeve and the gear part;

[0011] The manual back-off mechanism comprises a back-off wrench and the transmission member, the back-off wrench extends to the transmission member through the shaft sleeve and is threadedly connected with the transmission member;

[0012] The transmission member has a first state and a second state, when the transmission member is in the first state, the gear part is engaged with the cutting rack and the drive gear, the drive motor drives the cutting rack to drive the cutting knife assembly to feed or retreat;

[0013] When the back-off wrench is threadedly connected with the transmission member, the transmission member is moved upward along the pin shaft by rotating the back-off wrench, the elastic member is compressed, until the gear part is disengaged from the drive gear and the positioning shaft is in abutment with the back-off wrench to be in the second state, the cutting rack is retracted by continuously rotating the back-off wrench.

[0014] In one of the embodiments, the transmission member is internally provided with a first through hole and a second through hole arranged coaxially and penetrating each other, the first through hole is internally threaded and has an inner diameter smaller than an outer diameter of the pin shaft, the second through hole is adapted to the pin shaft.

[0015] In one of the embodiments, the shaft sleeve is internally provided with a third through hole and a fourth through hole arranged coaxially and penetrating each other, the fourth through hole is adapted to the positioning shaft, the third through hole has an inner diameter smaller than an inner diameter of the fourth through hole.

[0016] In one of the embodiments, the back-off wrench comprises a body part, a limiting pin, a fixing pin and a functional pin arranged in sequence, the functional pin is externally threaded and adapted to the first through hole, the fixing pin is adapted to the third through hole, the functional pin has an outer diameter smaller than an inner diameter of the third through hole, the limiting pin has an outer diameter larger than the inner diameter of the third through hole.

[0017] In one of the embodiments, the body part is connected with the limiting pin to be L-shaped, the functional pin, the fixing pin and the limiting pin are arranged coaxially.

[0018] In one of the embodiments, an upper end surface of the pin shaft extends into the shaft sleeve.

[0019] In one of the embodiments, it further comprises a sleeve module, a distal end of the sleeve module is provided with a staple cartridge mechanism, the staple cartridge mechanism comprises a staple cartridge seat, a staple abutting seat movably hinged with the staple cartridge seat and an opening limiting spring sheet enabling the staple abutting seat to be in an open state, the cutting knife assembly extends between the staple cartridge seat and the staple abutting seat, the staple abutting seat is provided with a cutting knife limiting spring sheet matched with an upper end of the cutting knife assembly, the staple cartridge seat is provided with a limiting surface matched with a lower end of the cutting knife assembly.

[0020] When the nail abutting seat is closed relative to the nail cartridge seat, if there is no suture nail assembly in the nail cartridge seat, the cutting knife limiting spring plate abuts against the cutting knife assembly, the lower end of the cutting knife assembly abuts against the limiting surface, the cutting knife assembly is limited to feed, if there is a suture nail assembly in the nail cartridge seat, the suture nail assembly abuts against the lifting part at the front end of the cutting knife assembly to lift the cutting knife assembly, and the cutting knife assembly can feed to perform a cutting operation.

[0021] In one of the embodiments, one end of the cutting knife limiting spring plate is fixed on the nail abutting seat and the other end is movably arranged.

[0022] The distal end in the technical solution above refers to the end close to the patient during the operation.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. When the driving motor fails, the back-off wrench is inserted into the shaft sleeve and threadedly connected with the transmission member, when the back-off wrench is rotated, the transmission member moves upward along the pin shaft until it is separated from the driving gear, and then the back-off wrench is continuously rotated to drive the cutting rack to move to realize back-off;

[0025] 2. The elastic member is arranged between the shaft sleeve and the transmission member, so that the transmission member and the driving gear and the cutting rack are kept in engagement to ensure the stability of the transmission structure, after the manual back-off operation is completed, the back-off wrench is separated from the transmission member, and the elastic member drives the transmission member to reset;

[0026] 3. The cutting knife limiting spring plate is arranged on the nail abutting seat, when the nail cartridge seat is not loaded with the suture nail assembly, the cutting knife limiting spring plate abuts against the cutting knife assembly, the cutting knife assembly abuts against the limiting surface on the nail cartridge seat, and the cutting knife assembly cannot realize feeding, thereby playing an insurance role, when the nail cartridge seat is loaded with the suture nail assembly, the suture nail assembly abuts against the lifting part at the front end of the cutting knife assembly to lift the cutting knife assembly, so that the cutting knife assembly will not abut against the limiting surface on the nail cartridge seat, and the normal work of the cutting knife assembly is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 The figure is a structural schematic view of the embodiment of the electric anastomat with the manual back-off mechanism of the present application.

[0029] Figure 2 The figure is a structural schematic view of the body module in the embodiment of the present application.

[0030] Figure 3 For Figure 2 schematic view of section A-A in FIG. 1;

[0031] Figure 4 schematic view of the structure of the transmission mechanism in the embodiment of the present application;

[0032] Figure 5 schematic view of the structure of the transmission member in the embodiment of the present application;

[0033] Figure 6 For Figure 5 schematic view of section B-B in FIG. 1;

[0034] Figure 7 schematic view of the structure of the shaft sleeve in the embodiment of the present application;

[0035] Figure 8 schematic view of the structure of the back-off wrench in the embodiment of the present application;

[0036] Figure 9 schematic view of one of the structures of the manual back-off process in the embodiment of the present application;

[0037] Figure 10 schematic view of the structure of the manual back-off process in the embodiment of the present application;

[0038] Figure 11 schematic view of the structure of the staple cartridge mechanism in the embodiment of the present application;

[0039] Figure 12 schematic view of the structure of the embodiment of the present application without the placement of the suture staple assembly;

[0040] Figure 13 schematic view of the structure of the embodiment of the present application with the placement of the suture staple assembly;

[0041] Figure 14 schematic view of the structure of the staple cartridge seat in the embodiment of the present application;

[0042] Figure 15 For Figure 14 enlarged view of part I in FIG. 1;

[0043] wherein:

[0044] 1, body module; 11, driving motor; 111, driving gear; 12, transmission mechanism; 121, shaft sleeve; 1211, fourth through hole; 1212, third through hole; 122, pin shaft; 123, elastic member; 124, transmission member; 1241, positioning shaft; 1242, gear part; 13, support; 1243, second through hole; 1244, first through hole; 125, back-off wrench; 1251, function pin; 1252, fixed pin; 1253, limiting pin; 1254, body part; 14, cutting rack;

[0045] 2, sleeve module; 21, cutting knife assembly; 211, lifting part; 221, cutting knife limiting elastic sheet; 222, nail abutting seat; 23, nail cartridge seat; 231, limiting surface;

[0046] 31, suturing nail assembly. DETAILED DESCRIPTION

[0047] The above scheme will be further described in combination with specific examples. It should be understood that these examples are used to illustrate the present application and do not limit the scope of the present application. The implementation conditions used in the examples can be further adjusted according to the specific conditions of the manufacturer, and the implementation conditions not mentioned are usually the conditions in the conventional experiments.

[0048] As shown in Figure 1 , it is a structural schematic diagram of an embodiment of the present application, which provides an electric anastomat with a manual back-off mechanism, comprising a body module 1, a rotating module and a sleeve module 2.

[0049] As shown in Figure 2 , the body module 1 comprises a support 13, and a driving mechanism, a transmission mechanism and a manual back-off mechanism installed on the support 13, the driving mechanism comprising a driving motor 11 and a driving gear 111 arranged at the power output end of the driving motor 11.

[0050] The sleeve module 1 comprises a sleeve mechanism, a nail cartridge mechanism arranged at the distal end of the sleeve mechanism and a firing rod penetrating the sleeve mechanism, the cutting knife mechanism comprising a cutting rack 14 movably arranged on the support 13 and a cutting knife assembly 21 arranged in the nail cartridge mechanism, wherein the cutting rack 14 is located above the driving gear 111, the cutting knife assembly 21 is connected with the cutting rack 14 through the firing rod, the driving mechanism drives the cutting knife assembly 21 to feed or retreat, and the transmission mechanism 12 connects the cutting knife mechanism and the driving mechanism.

[0051] When the driving motor 11 fails, in order to facilitate the back-off of the cutting knife assembly 21, as shown in Figure 3 and Figure 4As shown, the transmission mechanism 12 comprises a pin shaft 122 fixed on the support 13 and extending in the vertical direction, a transmission member 124 sleeved on the pin shaft 122 and limited on the upper end of the pin shaft 122, a shaft sleeve 121 fixedly arranged on the support 13 and sleeved on the transmission member 124, and an elastic member 123 arranged between the transmission member 124 and the shaft sleeve 121, and the shaft sleeve 121, the transmission member 124 and the pin shaft 122 are coaxially arranged. Among them, the upper end surface of the pin shaft 122 extends into the shaft sleeve 121, so that the transmission member 124 is clamped between the shaft sleeve 121 and the pin shaft 122, which can improve the stability of the structure.

[0052] The manual back-off mechanism comprises a back-off wrench 125 and the transmission member 124, the back-off wrench 125 can extend to the transmission member 124 through the shaft sleeve 121 and be threadedly connected with the transmission member 124, so as to drive the transmission member 124 to move up and down along the pin shaft 122.

[0053] As shown in the figure, Figure 5 The transmission member 124 comprises a positioning shaft 1241 and a gear portion 1242 arranged in the upper and lower directions, wherein the outer diameter of the positioning shaft 1241 is smaller than the outer diameter of the gear portion 1242, the elastic member 123 is sleeved on the positioning shaft 1241 and abuts between the shaft sleeve 121 and the gear portion 1242, and preferably, the elastic member 123 is a spring. The transmission member 124 has a first state and a second state, when the transmission member 124 is in the first state, the upper and lower parts of the gear portion 1242 are respectively engaged with the cutting rack 14 and the driving gear 111, the driving motor 11 drives the cutting rack 14 to drive the cutting knife assembly 21 to feed or retreat. When the back-off wrench 125 is threadedly connected with the transmission member 124, the transmission back-off wrench 125 is driven, the transmission member 124 moves upward along the pin shaft 122, the elastic member 123 is compressed, until the gear portion 1242 is disengaged from the driving gear 111 and the positioning shaft 1241 abuts against the back-off wrench 125 to be in the second state, continue to rotate the back-off wrench 125, the transmission member 124 rotates and drives the cutting rack 14 to back off.

[0054] As shown in the figure, Figure 6 The transmission member 124 is provided with a first through hole 1244 and a second through hole 1243 arranged coaxially and penetrating each other in the upper and lower directions, the first through hole 1244 is provided with an internal thread and the inner diameter is smaller than the outer diameter of the pin shaft 122, and the second through hole 1243 is matched with the pin shaft 122, so that the pin shaft 122 can be arranged in the second through hole 1243 and the upper end abuts against the lower end of the first through hole 1244, so as to limit the transmission member 124 on the upper end of the pin shaft 122.

[0055] As shown in the figure, Figure 7 The shaft sleeve 121 is provided with a third through hole 1212 and a fourth through hole 1211 arranged in the upper and lower directions and penetrating each other, wherein the fourth through hole 1211 is matched with the positioning shaft 1241, and the inner diameter of the third through hole 1212 is smaller than the inner diameter of the fourth through hole 1211.

[0056] As Figure 8 shown, the back-off wrench 125 includes a body part 1254, a limiting pin 1253, a fixed pin 1252 and a functional pin 1251 arranged in sequence, the functional pin 1251 is provided with external threads matched with the first through hole 1244, the fixed pin 1252 is matched with the third through hole 1212, the outer diameter of the functional pin 1251 is smaller than the inner diameter of the third through hole 1212, the outer diameter of the limiting pin 1253 is greater than the inner diameter of the third through hole 1212, when the functional pin 1251 extends to the first through hole 1244 through the third through hole 1212, the fixed pin 1252 can be rotatable in the third through hole 1212, and the limiting pin 1253 is limited to abut on the upper end of the shaft sleeve 121, thereby facilitating the positioning of the back-off wrench 125 on the shaft sleeve 121.

[0057] Specifically, the body part 1254 is connected with the limiting pin 1253 in an L shape, and the functional pin 1251, the fixed pin 1252 and the limiting pin 1253 are coaxially arranged, the structural leverage of the back-off wrench 125 is longer, facilitating the rotating operation and the realization of manual back-off.

[0058] As Figure 11 shown, the nail cartridge mechanism includes a nail cartridge seat 23, a nail abutting seat 222 movably hinged with the nail cartridge seat 23 and an opening limiting spring sheet for enabling the nail abutting seat 222 to be in an open state, the cutting knife assembly 21 extends between the nail cartridge seat 23 and the nail abutting seat 222, the nail abutting seat 222 is provided with a cutting knife limiting spring sheet 221 matched with the upper end of the cutting knife assembly 21, and the nail cartridge seat 23 is provided with a limiting surface 231 matched with the lower end of the cutting knife assembly 21 (as Figure 14 and Figure 15 shown).

[0059] When the nail abutting seat 222 is closed relative to the nail cartridge seat 23, if there is no suture nail assembly 31 in the nail cartridge seat 23, the cutting knife limiting spring sheet 221 abuts against the cutting knife assembly 21, the lower end of the cutting knife assembly 21 abuts against the limiting surface 231, and the cutting knife assembly 21 is limited to be fed (as Figure 12 shown); if there is a suture nail assembly 31 in the nail cartridge seat 23, the suture nail assembly 31 abuts against the lifting part 211 at the front end of the cutting knife assembly 21 to lift the cutting knife assembly 21, and the cutting knife assembly 21 can be fed for cutting operation (as Figure 13 shown).

[0060] Specifically, one end of the cutting knife limiting spring sheet 221 is fixed on the nail abutting seat 222 and the other end is movably arranged.

[0061] The working principle of the present application is as follows:

[0062] Manual back-off process:

[0063] When the driving motor 11 fails, as Figure 9As shown, the function pin 1251 of the back-off wrench 125 enters the first through hole 1244 of the transmission member 124 through the third through hole 1212, the back-off wrench 125 is rotated, the transmission member 124 is driven to move upward along the pin shaft 122, when the upper end of the positioning shaft 1241 abuts against the lower end of the fixed pin 1252, the transmission member 124 cannot continue to move upward and is disengaged from the driving gear 111 (as shown in Figure 10 After that, the back-off wrench 125 is continuously rotated, the back-off wrench 125 drives the transmission member 124 to rotate, thereby driving the cutting rack 12 to move in the bracket 13 to realize back-off, the back-off wrench 125 is reversely rotated, the transmission member 124 moves downward along the pin shaft 122 and gradually disengages from the back-off wrench 125, until the function pin 1251 is reset to leave the first through hole 1244, the transmission member 124 is kept in engagement with the driving gear 111 and the cutting rack 14 under the action of the elastic member 123.

[0064] Cutting safety process:

[0065] When the abutting seat 222 is closed relative to the nail cartridge seat 23, if there is no suture nail assembly 31 in the nail cartridge seat 23, the cutting knife limiting spring 221 abuts against the cutting knife assembly 21, the lower end of the cutting knife assembly 21 abuts against the limiting surface 231, the cutting knife assembly 21 is limited to feed, if there is a suture nail assembly 31 in the nail cartridge seat 23, the suture nail assembly 31 abuts against the lifting part 211 at the front end of the cutting knife assembly 21 to lift the cutting knife assembly 21, the cutting knife assembly 21 can feed to perform cutting operation.

[0066] In summary, the electric anastomat can realize manual back-off operation, the back-off mechanism is simple and has good stability; the electric anastomat is also provided with cutting safety structure, which guarantees the safety performance of the operation.

[0067] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An electric anastomat with a manual back-off mechanism, comprising a support, a cutting knife mechanism, a driving mechanism for driving the cutting knife mechanism to feed or retreat the cutting knife, and a transmission mechanism connecting the driving mechanism and the cutting knife mechanism, the cutting knife mechanism comprising a cutting rack and a cutting knife assembly connected with the cutting rack, the driving mechanism comprising a driving motor and a driving gear arranged at a power output end of the driving motor, characterized in that, the transmission mechanism comprises a transmission gear connected with the driving gear and a transmission shaft connected with the transmission gear, the transmission shaft is connected with the cutting rack, and the transmission shaft is provided with a manual back-off mechanism. The transmission mechanism comprises: a pin shaft fixedly arranged on the bracket and extending in the vertical direction; a transmission member sleeved on the pin shaft and positioned at the upper end of the pin shaft, the transmission member comprising a positioning shaft and a gear portion arranged in an up-down manner, the outer diameter of the positioning shaft being smaller than the outer diameter of the gear portion, the transmission member being internally provided with a first through hole and a second through hole arranged in a coaxial manner and penetrating each other, the first through hole being internally threaded and having an inner diameter smaller than the outer diameter of the pin shaft, the second through hole being adapted to the pin shaft; a shaft sleeve fixedly arranged on the bracket and sleeved above the transmission member, the shaft sleeve, the transmission member and the pin shaft being arranged in a coaxial manner, the shaft sleeve being internally provided with a third through hole and a fourth through hole arranged in a coaxial manner and penetrating each other, the fourth through hole being adapted to the positioning shaft, the third through hole having an inner diameter smaller than the inner diameter of the fourth through hole; a resilient member sleeved on the positioning shaft and abutting between the shaft sleeve and the gear portion; the manual back-off mechanism comprising a back-off wrench and the transmission member, the back-off wrench extending to the transmission member through the shaft sleeve and being threadedly connected with the transmission member, the back-off wrench comprising a body portion, a limiting pin, a fixing pin and a functional pin arranged in sequence, the functional pin being internally threaded and adapted to the first through hole, the fixing pin being adapted to the third through hole, the functional pin having an outer diameter smaller than the inner diameter of the third through hole, the limiting pin having an outer diameter greater than the inner diameter of the third through hole; the transmission member having a first state and a second state, when the transmission member is in the first state, the gear portion is engaged with the cutting rack and the drive gear, the drive motor drives the cutting rack to drive the cutting knife assembly to feed or retract; when the back-off wrench is threadedly connected with the transmission member, the transmission member moves upward along the pin shaft by rotating the back-off wrench, the resilient member is compressed, until the gear portion is disengaged from the drive gear and the positioning shaft is abutted with the back-off wrench to be in the second state, and the cutting rack is retracted by continuously rotating the back-off wrench.

2. The electrically powered anastomotic device with a manual backout mechanism according to claim 1, characterized in that: the body portion and the limiting pin are connected in an L shape, and the functional pin, the fixing pin and the limiting pin are arranged in a coaxial manner.

3. The electrically powered anastomotic surgical stapler with a manual backout mechanism according to claim 1, characterized in that: the upper end surface of the pin shaft extends into the shaft sleeve.

4. The electrically powered anastomosis device with manual fallback mechanism of claim 1, wherein: the sleeve module is further provided, the distal end of the sleeve module being provided with a nail cartridge mechanism, the nail cartridge mechanism comprising a nail cartridge seat, a nail abutting seat movably hinged with the nail cartridge seat and an opening limiting elastic sheet enabling the nail abutting seat to be in an open state, the cutting knife assembly extending between the nail cartridge seat and the nail abutting seat, the nail abutting seat being provided with a cutting knife limiting elastic sheet matched with the upper end of the cutting knife assembly, and the nail cartridge seat being provided with a limiting surface matched with the lower end of the cutting knife assembly. When the abutting seat is closed relative to the cartridge seat, if there is no suture needle assembly in the cartridge seat, the cutting knife limiting spring plate abuts against the cutting knife assembly, the lower end of the cutting knife assembly abuts against the limiting surface, and the cutting knife assembly is limited to feed; if there is a suture needle assembly in the cartridge seat, the suture needle assembly abuts against the lifting part at the front end of the cutting knife assembly to lift the cutting knife assembly, and the cutting knife assembly can feed to perform a cutting operation.

5. The electrically powered anastomosis device with manual backout mechanism of Claim 4, wherein: One end of the cutting knife limiting spring plate is fixed on the abutting seat and the other end is movably arranged.

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