Electric anastomat with manual rollback mechanism

Abstract

The invention discloses an electric anastomat with a manual rollback mechanism, which comprises a support, a cutting knife mechanism, a driving mechanism and a transmission mechanism connected with the driving mechanism and the cutting knife mechanism, and 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, and the transmission mechanism comprises a pin shaft which is fixedly arranged on the support and extends in the vertical direction; the transmission piece is arranged on the pin shaft in a sleeving mode and limited at the upper end of the pin shaft, the transmission piece comprises a positioning shaft and a gear part which are arranged up and down, and the outer diameter of the positioning shaft is smaller than that of the gear part; the shaft sleeve is fixedly arranged on the support and arranged above the transmission part in a sleeving mode. The elastic piece is arranged on the positioning shaft in a sleeving mode and abuts against the position between the shaft sleeve and the gear part; the manual rollback mechanism comprises a rollback wrench and a transmission piece, and the rollback wrench extends to the transmission piece through the shaft sleeve and is in threaded connection with the transmission piece. According to the electric anastomat provided by the invention, manual rollback can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an electric stapler with a manual retraction mechanism. Background Art

[0002] As an iterative product of traditional manual staplers, electric staplers are widely used in resection, transection and anastomosis of organs and tissues such as lungs, trachea, stomach and intestines in surgical operations. Compared with manual staplers, the electric stapler requires less effort in the anastomosis process and has higher quality.

[0003] Since the electric stapler has a drive motor, when the battery fails, the cutting knife needs to be manually reset to the initial position, and before manually resetting the cutting knife, the power connection between the motor and the rack needs to be cut off. Currently, staplers of various brands mainly release the power on the rack by pressing down the transmission gear to disengage the transmission gear from the rack, such as a manual retraction method for the stapler disclosed in Chinese patent CN117137558A. The above retraction method has obvious disadvantages, that is, when the stapler cuts thick tissue, there is a biting phenomenon between the gear and the rack, making it difficult to press down the transmission gear. Summary of the invention

[0004] Based on the above problems, an object of the present invention is to provide an electric stapler with a manual retraction mechanism, which has a simple structure and is easy to operate.

[0005] In order to overcome the deficiencies of the prior art, the technical solution provided by the present invention is:

[0006] An electric stapler with a manual retraction mechanism comprises a bracket, a cutting knife mechanism, a driving mechanism for driving the cutting knife mechanism to feed or retract, and a transmission mechanism connecting the driving mechanism and the cutting knife mechanism, wherein the cutting knife mechanism comprises a cutting rack and a cutting knife assembly connected to the cutting rack, the driving mechanism comprises a driving motor and a driving gear arranged at the power output end of the driving motor, and the transmission mechanism comprises:

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

[0008] A transmission member, which is sleeved on the pin shaft and limited at the upper end of the pin shaft, the transmission member includes a positioning shaft and a gear part arranged up and down, and the outer diameter of the positioning shaft is smaller than the outer diameter of the gear part;

[0009] A shaft sleeve, which is fixedly arranged on the bracket and sleeved on the transmission member, wherein the shaft sleeve, the transmission member and the pin are coaxially arranged;

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

[0011] The manual retraction mechanism comprises a retraction wrench and the transmission member, wherein the retraction wrench extends to the transmission member through the shaft sleeve and is threadedly connected to 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 meshed with the cutting rack and the driving gear, and the driving motor drives the cutting rack to drive the cutting knife assembly to feed or retract.

[0013] When the retraction wrench is threadedly connected to the transmission member, the retraction wrench is rotated, the transmission member moves upward along the pin shaft, and the elastic member is compressed until the gear portion is disengaged from the driving gear and the positioning shaft abuts against the retraction wrench and is located in the second state, and the retraction wrench is continued to be rotated to drive the cutting rack to retract.

[0014] In one embodiment, the transmission member is provided with a first through hole and a second through hole which are coaxially arranged up and down and interpenetrate each other, the first through hole is provided with an internal thread and the inner diameter is smaller than the outer diameter of the pin shaft, and the second through hole is adapted to the pin shaft.

[0015] In one embodiment, the sleeve is provided with a third through hole and a fourth through hole which are coaxially arranged up and down and interpenetrate each other, the fourth through hole is adapted to the positioning shaft, and the inner diameter of the third through hole is smaller than the inner diameter of the fourth through hole.

[0016] In one embodiment, the retraction wrench includes a main body, a limit pin, a fixing pin and a functional pin which are arranged in sequence, the functional pin is provided with an external thread matching the first through hole, the fixing pin is adapted to the third through hole, the outer diameter of the functional pin is smaller than the inner diameter of the third through hole, and the outer diameter of the limit pin is larger than the inner diameter of the third through hole.

[0017] In one embodiment, the main body is connected to the limit pin in an L-shape, and the functional pin, the fixing pin and the limit pin are coaxially arranged.

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

[0019] In one embodiment, it further comprises a sleeve module, the distal end of which is provided with a nail magazine mechanism, the nail magazine mechanism comprising a nail magazine seat, a nail anvil seat movably hinged to the nail magazine seat, and an opening limiting spring sheet which enables the nail anvil seat to be in an open state, the cutting knife assembly extends between the nail magazine seat and the nail anvil seat, the nail anvil seat is provided with a cutting knife limiting spring sheet which cooperates with the upper end of the cutting knife assembly, and the nail magazine seat is provided with a limiting surface which cooperates with the lower end of the cutting knife assembly;

[0020] When the nail support seat is closed relative to the nail magazine seat, if there is no suture nail assembly in the nail magazine seat, the cutting knife limiting spring plate abuts against the cutting knife assembly, and the lower end of the cutting knife assembly abuts against the limiting surface, and the cutting knife assembly is restricted from feeding; if there is a suture nail assembly in the nail magazine 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 be fed to perform cutting operations.

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

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

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] 1. When the driving motor fails, the retraction wrench is inserted into the shaft sleeve and connected with the transmission part through the thread. When the retraction wrench is turned, the transmission part moves up along the pin until it is separated from the driving gear, and then the retraction wrench is continued to be turned to drive the cutting rack to move and realize retraction;

[0025] 2. An elastic member is arranged between the shaft sleeve and the transmission member, so that the transmission member can maintain the meshing state with the driving gear and the cutting rack to ensure the stability of the transmission structure. When the manual retraction operation is completed, the retraction wrench is separated from the transmission member, and the elastic member can drive the transmission member to reset;

[0026] 3. A cutting knife limiting spring piece is arranged on the nail support seat. When the suture nail assembly is not loaded into the nail magazine seat, the cutting knife limiting spring piece abuts against the cutting knife assembly, so that the cutting knife assembly abuts against the limiting surface on the nail magazine seat, and the cutting knife assembly cannot be fed, thereby playing a safety role. When the suture nail assembly is loaded into the nail magazine seat, the suture nail assembly abuts against the lifting part at the front end of the cutting knife assembly, and the cutting knife assembly is lifted and does not abut against the limiting surface on the nail magazine seat, thereby ensuring the normal operation of the cutting knife assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of an electric stapler with a manual retraction mechanism of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a body module in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the middle AA section;

[0031] Figure 4 It is a structural schematic diagram of a transmission mechanism in an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the transmission member in an embodiment of the present invention;

[0033] Figure 6 for Figure 5 Schematic diagram of the middle BB section;

[0034] Figure 7 It is a schematic diagram of the structure of the shaft sleeve in an embodiment of the present invention;

[0035] Figure 8 Schematic diagram of the structure of the retraction wrench in the embodiment of the present invention;

[0036] Fig. 9 This is one of the structural schematic diagrams of the manual rollback process of an embodiment of the present invention;

[0037] Fig.10 This is the second structural diagram of the manual rollback process according to an embodiment of the present invention;

[0038] Fig.11 It is a structural schematic diagram of a nail magazine mechanism in an embodiment of the present invention;

[0039] Fig.12 It is a schematic diagram of the structure when no suture staple assembly is inserted in the embodiment of the present invention;

[0040] Fig.13 It is a schematic diagram of the structure when a suture staple assembly is inserted in an embodiment of the present invention;

[0041] Fig.14 This is a schematic structural diagram of a nail magazine seat in an embodiment of the present invention;

[0042] Fig.15 for Fig.14 The local enlarged view of point I in the middle;

[0043] in:

[0044] 1. Body module; 11. Driving motor; 111. Driving gear; 12. Transmission mechanism; 121. Bushing; 1211. Fourth through hole; 1212. Third through hole; 122. Pin; 123. Elastic member; 124. Transmission member; 1241. Positioning shaft; 1242. Gear unit; 13. Bracket; 1243. Second through hole; 1244. First through hole; 125. Retraction wrench; 1251. Function pin; 1252. Fixing pin; 1253. Limiting pin; 1254. Main unit; 14. Cutting rack;

[0045] 2. Casing module; 21. Cutting knife assembly; 211. Lifting portion; 221. Cutting knife limiting spring; 222. Nail support seat; 23. Nail magazine seat; 231. Limiting surface;

[0046] 31. Suture staple assembly. DETAILED DESCRIPTION

[0047] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not limited to the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0048] like Figure 1 , which is a schematic structural diagram of an embodiment of the present invention, provides an electric stapler with a manual retraction mechanism, including a body module 1, a rotation module and a sleeve module 2.

[0049] like Figure 2 As shown, the body module 1 includes a bracket 13, and a driving mechanism, a transmission mechanism and a manual retraction mechanism installed on the bracket 13. The driving mechanism includes 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 includes a sleeve mechanism, a nail magazine mechanism arranged at the distal end of the sleeve mechanism and a firing rod inserted in the sleeve mechanism, the cutting knife mechanism includes a cutting rack 14 movably arranged on a bracket 13 and a cutting knife assembly 21 arranged in the nail magazine mechanism, wherein the cutting rack 14 is located above the driving gear 111, the cutting knife assembly 21 is connected to the cutting rack 14 via the firing rod, the driving mechanism drives the cutting knife assembly 21 to feed or retract, 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 retreat of the cutting blade assembly 21, as shown in FIG. Figure 3 and Figure 4As shown, the transmission mechanism 12 includes a pin 122 fixed on the bracket 13 and extending in the vertical direction, a transmission member 124 sleeved on the pin 122 and limited at the upper end of the pin 122, a sleeve 121 fixedly arranged on the bracket 13 and sleeved on the transmission member 124, and an elastic member 123 arranged between the transmission member 124 and the sleeve 121. The sleeve 121, the transmission member 124 and the pin 122 are coaxially arranged. The upper end surface of the pin 122 extends into the sleeve 121, so that the transmission member 124 is clamped between the sleeve 121 and the pin 122, which can improve the stability of the structure.

[0052] The manual retraction mechanism includes a retraction wrench 125 and a transmission member 124 . The retraction wrench 125 can extend to the transmission member 124 through the shaft sleeve 121 and be threadedly connected to the transmission member 124 , thereby driving the transmission member 124 to move up and down along the pin shaft 122 .

[0053] like Figure 5 As shown, the transmission member 124 includes a positioning shaft 1241 and a gear part 1242 arranged up and down, wherein the outer diameter of the positioning shaft 1241 is smaller than the outer diameter of the gear part 1242, and the elastic member 123 is sleeved on the positioning shaft 1241 and abuts between the shaft sleeve 121 and the gear part 1242. 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 part 1242 are respectively meshed with the cutting rack 14 and the driving gear 111, and the driving motor 11 drives the cutting rack 14 to drive the cutting knife assembly 21 to feed or retract. When the retraction wrench 125 is threadedly connected with the transmission member 124, the retraction wrench 125 is transmitted, and the transmission member 124 moves up along the pin shaft 122, and 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 retraction wrench 125 and is located in the second state, and the retraction wrench 125 continues to be rotated, and the transmission member 124 rotates and drives the cutting rack 14 to retract.

[0054] like Figure 6 As shown, the transmission member 124 is provided with a first through hole 1244 and a second through hole 1243 which are coaxially arranged up and down and intercommunicate with each other. 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. The second through hole 1243 is adapted to the pin shaft 122, so that the pin shaft 122 can be inserted into the second through hole 1243 and the upper end abuts against the lower end of the first through hole 1244, so that the transmission member 124 is limited at the upper end of the pin shaft 122.

[0055] like Figure 7 As shown, a third through hole 1212 and a fourth through hole 1211 are arranged up and down and interpenetrate each other in the sleeve 121 , wherein the fourth through hole 1211 is adapted to 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] like Figure 8 As shown, the retraction wrench 125 includes a main body 1254, a limit pin 1253, a fixing pin 1252 and a functional pin 1251 which are arranged in sequence. The functional pin 1251 is provided with an external thread that cooperates with the first through hole 1244, and the fixing pin 1252 is adapted to 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, and the outer diameter of the limit pin 1253 is larger 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 fixing pin 1252 can be inserted into the third through hole 1212 and rotated, and the limit pin 1253 is limited and abutted against the upper end of the sleeve 121, so as to facilitate the positioning of the retraction wrench 125 on the sleeve 121.

[0057] Specifically, the main body 1254 is connected to the limit pin 1253 in an L shape, and the functional pin 1251, the fixing pin 1252 and the limit pin 1253 are coaxially arranged. The structural force arm of the retraction wrench 125 is relatively long, which is convenient for rotation operation and manual retraction.

[0058] like Fig.11 As shown, the nail magazine mechanism includes a nail magazine seat 23, a nail anvil seat 222 movably hinged to the nail magazine seat 23, and an opening limiting spring piece that keeps the nail anvil seat 222 in an open state. The cutting knife assembly 21 extends between the nail magazine seat 23 and the nail anvil seat 222. The nail anvil seat 222 is provided with a cutting knife limiting spring piece 221 that cooperates with the upper end of the cutting knife assembly 21, and the nail magazine seat 23 is provided with a limiting surface 231 (as shown in FIG. Fig.14 and Fig.15 shown).

[0059] When the staple support 222 is closed relative to the staple cartridge seat 23, if there is no staple assembly 31 in the staple cartridge seat 23, the cutting knife limiting spring piece 221 abuts against the cutting knife assembly 21, and the lower end of the cutting knife assembly 21 abuts against the limiting surface 231, and the cutting knife assembly 21 is restricted from feeding (such as Fig.12 If there is a staple assembly 31 in the staple cartridge seat 23, the staple assembly 31 abuts against the lifting portion 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 to perform a cutting operation (such as Fig.13 shown).

[0060] Specifically, one end of the cutting blade limiting spring piece 221 is fixed on the anvil seat 222 and the other end is movably arranged.

[0061] The working principle of the present invention is:

[0062] Manual rollback process:

[0063] When the drive motor 11 fails, Fig. 9As shown, the function pin 1251 of the retraction wrench 125 enters the first through hole 1244 of the transmission member 124 through the third through hole 1212, and the retraction wrench 125 is rotated. The transmission member 124 moves up along the pin shaft 122 under the drive of the retraction wrench 125. When the upper end of the positioning shaft 1241 abuts against the lower end of the fixing pin 1252, the transmission member 124 cannot continue to move up and is separated from the driving gear 111 (as shown in FIG. Fig.10 As shown), the retraction wrench 125 is then continuously rotated, and the retraction wrench 125 drives the transmission member 124 to rotate, thereby driving the cutting rack 12 to move in the bracket 13 to achieve retraction, and the retraction wrench 125 is rotated in the reverse direction, and the transmission member 124 moves downward along the pin shaft 122 and gradually disengages from the retraction wrench 125 until the functional pin 1251 leaves the first through hole 1244 and resets, and the transmission member 124 remains engaged with the driving gear 111 and the cutting rack 14 under the action of the elastic member 123.

[0064] Cutting insurance process:

[0065] When the staple support 222 is closed relative to the staple magazine seat 23, if there is no suture staple assembly 31 in the staple magazine seat 23, the cutting knife limiting spring piece 221 abuts against the cutting knife assembly 21, and the lower end of the cutting knife assembly 21 abuts against the limiting surface 231, and the cutting knife assembly 21 is restricted from feeding. If there is a suture staple assembly 31 in the staple magazine seat 23, the suture staple 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 to perform cutting operations.

[0066] In summary, the electric stapler can realize manual retraction operation, and the retraction mechanism is simple and has good stability. The electric stapler is also provided with a cutting safety structure to ensure the safety performance of the operation.

[0067] The above examples are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric stapler with a manual retraction mechanism, comprising a bracket, a cutting knife mechanism, a driving mechanism for driving the cutting knife mechanism to feed or retract, and a transmission mechanism connecting the driving mechanism and the cutting knife mechanism, wherein the cutting knife mechanism comprises a cutting rack and a cutting knife assembly connected to the cutting rack, and the driving mechanism comprises 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 pin shaft, which is fixedly arranged on the bracket and extends in the vertical direction; A transmission member, which is sleeved on the pin shaft and limited at the upper end of the pin shaft, the transmission member includes a positioning shaft and a gear part arranged up and down, and the outer diameter of the positioning shaft is smaller than the outer diameter of the gear part; A shaft sleeve, which is fixedly arranged on the bracket and sleeved on the transmission member, wherein the shaft sleeve, the transmission member and the pin are coaxially arranged; An elastic member, which is sleeved on the positioning shaft and abuts between the shaft sleeve and the gear portion; The manual retraction mechanism comprises a retraction wrench and the transmission member, wherein the retraction wrench extends to the transmission member through the shaft sleeve and is threadedly connected to the transmission member; The transmission member has a first state and a second state. When the transmission member is in the first state, the gear part is meshed with the cutting rack and the driving gear, and the driving motor drives the cutting rack to drive the cutting knife assembly to feed or retract. When the retraction wrench is threadedly connected to the transmission member, the retraction wrench is rotated, the transmission member moves upward along the pin shaft, and the elastic member is compressed until the gear portion is disengaged from the driving gear and the positioning shaft abuts against the retraction wrench and is located in the second state, and the retraction wrench is continued to be rotated to drive the cutting rack to retract.

2. The electric stapler with a manual retraction mechanism according to claim 1, characterized in that: The transmission member is provided with a first through hole and a second through hole which are coaxially arranged up and down and interpenetrate each other. The first through hole is provided with an internal thread and has an inner diameter smaller than the outer diameter of the pin shaft. The second through hole is adapted to the pin shaft.

3. The electric stapler with a manual retraction mechanism according to claim 2, characterized in that: The shaft sleeve is provided with a third through hole and a fourth through hole which are coaxially arranged up and down and interpenetrate each other. The fourth through hole is adapted to the positioning shaft. The inner diameter of the third through hole is smaller than the inner diameter of the fourth through hole.

4. The electric stapler with a manual retraction mechanism according to claim 3, characterized in that: The retraction wrench includes a main body, a limit pin, a fixing pin and a functional pin which are arranged in sequence. The functional pin is provided with an external thread which cooperates with the first through hole. The fixing pin is adapted to the third through hole. The outer diameter of the functional pin is smaller than the inner diameter of the third through hole. The outer diameter of the limit pin is larger than the inner diameter of the third through hole.

5. The electric stapler with a manual retraction mechanism according to claim 4, characterized in that: The main body is connected to the limiting pin in an L shape, and the functional pin, the fixing pin and the limiting pin are coaxially arranged.

6. The electric stapler with a manual retraction mechanism according to claim 1, characterized in that: The upper end surface of the pin shaft extends into the shaft sleeve.

7. The electric stapler with a manual retraction mechanism according to claim 1, characterized in that: It also includes a sleeve module, the distal end of which is provided with a nail magazine mechanism, the nail magazine mechanism including a nail magazine seat, a nail anvil seat movably hinged to the nail magazine seat, and an opening limiting spring sheet that enables the nail anvil seat to be in an open state, the cutting knife assembly extends between the nail magazine seat and the nail anvil seat, the nail anvil seat is provided with a cutting knife limiting spring sheet that cooperates with the upper end of the cutting knife assembly, and the nail magazine seat is provided with a limiting surface that cooperates with the lower end of the cutting knife assembly; When the nail support seat is closed relative to the nail magazine seat, if there is no suture nail assembly in the nail magazine seat, the cutting knife limiting spring plate abuts against the cutting knife assembly, and the lower end of the cutting knife assembly abuts against the limiting surface, and the cutting knife assembly is restricted from feeding; if there is a suture nail assembly in the nail magazine 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 be fed to perform cutting operations.

8. The electric stapler with a manual retraction mechanism according to claim 7, characterized in that: One end of the cutting knife limiting spring piece is fixed on the nail support and the other end is movably arranged.

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