Electric anastomat with jaw deflection locking mechanism

Abstract

The application discloses an electric anastomat with a jaw bending locking mechanism, which comprises a locking block arranged in a steering fixed seat and movably arranged along the length direction of an outer sleeve, a first limiting end face is formed on the side of the locking block close to the steering fixed seat, a second limiting end face and a third limiting end face are oppositely arranged on the side of the locking block close to the outer sleeve, a transition plane is formed between the second limiting end face and the third limiting end face, a driving part with a length smaller than the transition plane is arranged on the outer sleeve, the driving part is provided with a first driving face matched with the second limiting end face and a second driving face matched with the third limiting end face, a locking block reset spring is sleeved on the locking block and abuts between the locking block and the steering fixed seat, and a fixed tooth disc is arranged on the steering control seat and matched with a fixed protrusion. The electric anastomat with the jaw bending locking mechanism can realize the locking of the jaw bending.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an electric stapler with a jaw bending and locking mechanism. Background Technology

[0002] The electric laparoscopic cutting and anastomosis device has a good therapeutic effect of stabilizing severed tissues and effectively reducing wound bleeding.

[0003] A necessary condition for a stapler to achieve stable cutting is that its jaws can maintain their bending angle when bent. If the jaws wobble during the advance of the cutting blade, this wobble can easily cause the jaws to tear the tissue, especially blood vessels. Once tearing occurs, it will cause bleeding.

[0004] Chinese patent CN 107693068A proposes a novel jaw bending drive mechanism, which uses gears, racks and transmission links to achieve jaw bending. However, the gear and rack mechanism does not have a self-locking function, making it difficult to ensure that the jaws are stably maintained at the angle required by the operator.

[0005] Chinese patent CN114224414A proposes a novel jaw locking mechanism that uses the drive of an outer tube to realize the movement of the locking mechanism. The entire movement of the outer tube drives the locking mechanism to compress the spring. Therefore, the resistance of the compression spring is ultimately transmitted to the closing handle through the outer tube, which increases the driving force of the closing handle and affects the feel. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide an electric stapler with a jaw bending and locking mechanism, which can lock the jaw bending angle and is easy to operate.

[0007] To overcome the shortcomings of the prior art, the technical solution provided by this invention is as follows:

[0008] An electric stapler with a novel jaw bending and locking mechanism includes a cannula module, the cannula module including an inner cannula, an outer cannula that moves axially relative to the inner cannula, a steering control mechanism disposed at the distal end of the inner cannula, and a staple cartridge mechanism fixedly connected to the steering control mechanism.

[0009] The steering control mechanism includes a steering fixing seat fixed on the inner sleeve and a steering control seat rotatably connected to the steering fixing seat;

[0010] The turning locking mechanism is provided between the steering fixed seat and the steering control seat, and the turning locking mechanism includes:

[0011] A locking block is disposed within the steering fixing seat and is movable relative to the steering fixing seat along the length direction of the outer sleeve. A first limiting end face is formed on the side of the locking block near the steering fixing seat. A second limiting end face and a third limiting end face are formed opposite to each other on the side of the locking block near the outer sleeve. A transition plane is formed between the second limiting end face and the third limiting end face. A driving part with a length smaller than the transition plane is provided on the outer sleeve. The driving part has a first driving surface that cooperates with the second limiting end face and a second driving surface that cooperates with the third limiting end face.

[0012] A locking block return spring is sleeved on the locking block and abuts against the locking block and the steering fixing seat;

[0013] A fixed gear disc is mounted on the steering control seat and engages with the locking block;

[0014] In the initial state, the transition plane is in contact with the driving part, and there is a gap between the first driving surface and the second limiting end face. When the jaws are closed, the outer sleeve moves to the distal end, first traveling a distance without stopping. When the first driving surface abuts against the second limiting end face, the outer sleeve drives the locking block to move to the distal end and abut against the fixed gear plate to achieve locking. When unlocking is required, the outer sleeve moves to the proximal end, and the locking block moves to the proximal end under the action of the locking block return spring. When the third limiting end face contacts the second driving surface, the locking block continues to reset under the action of the outer sleeve.

[0015] In one embodiment, the locking block includes a body portion, a fixing protrusion disposed at the distal end of the body portion, a reset driving portion disposed at the proximal end of the body portion and protruding toward the outer sleeve, and a locking driving portion disposed between the fixing protrusion and the reset driving portion. The fixing protrusion cooperates with the fixing gear plate. One end of the locking driving portion protruding toward the steering fixing seat forms a first limiting end face. One end of the locking driving portion facing the reset driving portion forms a second limiting end face. The side of the reset driving portion facing the locking driving portion forms the third limiting end face.

[0016] In one embodiment, the driving part is an H-shaped through groove provided on the outer wall of the outer sleeve, the side of the H-shaped through groove facing the locking driving part forms the first driving surface and the side facing the reset driving part forms the second driving surface.

[0017] In one embodiment, a steering module is further included. The steering module includes a lower steering housing that cooperates with the upper steering assembly. The upper steering assembly includes the upper steering housing, a steering drive shaft rotatably disposed within the upper steering housing, a steering sleeve assembly fixed to the upper end of the steering drive shaft and a steering knob, a steering sleeve assembly disposed between the steering knob and the upper steering housing, two steering drive blocks slidably disposed on the outer sleeve and symmetrically arranged, and two steering linkages connecting the two steering drive blocks and the steering control seat. The lower end of the steering drive shaft is provided with two symmetrically arranged drive grooves, and the steering drive blocks are provided with drive columns that cooperate with the drive grooves.

[0018] In one embodiment, the steering drive block includes a slider portion, an arcuate surface disposed on the slider portion near one end of the outer sleeve, a support portion disposed on the arcuate surface and abutting against the inner sleeve, a connecting groove disposed on the slider portion away from the drive column, and a limiting support portion disposed on the slider portion and arranged opposite to the support portion. The connecting groove is connected to the steering linkage, and the limiting support portion is limited on the upper steering housing and the lower steering housing.

[0019] In one embodiment, the upper steering housing is provided with a first limiting surface that cooperates with the limiting support portion, and the lower steering housing is provided with a first supporting rib that cooperates with the limiting support portion.

[0020] In one embodiment, the steering linkage includes a rod body, a connecting portion disposed at the proximal end of the rod body, and a hook disposed at the distal end of the rod body. The steering control seat is provided with a connecting hole that mates with the hook. The lower steering housing is provided with a second support rib that mates with the connecting portion. The inner sleeve is provided with a second limiting surface that mates with the connecting portion and the second support rib, and a receiving groove for inserting the rod body.

[0021] In one embodiment, the device also includes a body module and a battery pack. The body module includes a circuit board assembly and a battery connection assembly connecting the circuit board assembly and the battery pack. The battery connection assembly includes a battery guide and a pair of battery plate electrodes mounted on the battery guide. The pair of battery plate electrodes are electrically connected to the battery pack.

[0022] In one embodiment, the battery guide includes a support plate arranged in a vertical direction, a guide post perpendicularly connected to the support plate, and guide plates disposed on both sides of the guide post.

[0023] The battery panel electrode sheet includes a first connecting piece mounted on the support plate, a bent piece bent from the first connecting piece toward the circuit board assembly, a conductive piece bent from the first connecting piece toward the guide plate, and a fixing hook disposed at the end of the conductive piece and secured to the guide plate.

[0024] In one embodiment, the battery pack includes a battery casing, a battery welding assembly disposed within the battery casing, and a battery cover disposed on the battery casing;

[0025] The battery welding assembly includes a battery cover, multiple batteries disposed within the battery cover, a planar battery electrode sheet connecting the multiple batteries in series, and an arc-shaped battery electrode sheet disposed on the positive and negative terminals of the series battery pack. The battery cover is provided with a battery compartment for inserting the multiple batteries, a guide compartment for inserting the guide post and guide plate, and an electrode sheet compartment for inserting the arc-shaped battery electrode sheet.

[0026] The arc-shaped battery electrode sheet includes a second connecting piece connected to the positive or negative electrode of the battery, a guide piece extending to the electrode sheet compartment, and a conductive arc sheet that bends from the guide piece and extends to the guide compartment.

[0027] In the above technical solution, the distal end refers to the end closer to the patient during surgery, and the proximal end refers to the end farther away from the patient during surgery.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] 1. A locking mechanism is set between the steering fixed seat and the steering control seat. The design of the locking block driven by the small stroke of the outer tube can realize the stable locking of the jaw angle, while improving the feel of the jaw closing and making the operation convenient.

[0030] 2. The steering mechanism adopts an eccentric drive design of the steering drive shaft, and is equipped with double steering drive blocks and double steering linkages, which can improve the consistency of the left and right turning angles when the jaws are turned.

[0031] 3. By embedding the arc-shaped battery electrode plates inside the battery pack, stable contact between the battery pack and the circuit board is achieved, improving the reliability of the instrument circuit. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a schematic diagram of an embodiment of the electric stapler with a jaw bending and locking mechanism of the present invention.

[0034] Figure 2 This is a schematic diagram of the disassembly structure of an embodiment of the present invention;

[0035] Figure 3 for Figure 2 Enlarged view of a section at point I;

[0036] Figure 4 This is a schematic diagram of the disassembled structure of the sleeve assembly in an embodiment of the present invention;

[0037] Figure 5 for Figure 4 Enlarged view of a section in area II;

[0038] Figure 6 This is one of the structural schematic diagrams of the steering control mechanism in an embodiment of the present invention;

[0039] Figure 7 This is a second schematic diagram of the steering control mechanism in an embodiment of the present invention;

[0040] Figure 8 This is one of the structural schematic diagrams of the steering fixing seat in an embodiment of the present invention;

[0041] Figure 9 This is a second schematic diagram of the structure of the steering fixing seat in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the steering control seat in an embodiment of the present invention;

[0043] Figure 11 This is one of the structural schematic diagrams of the locking block in an embodiment of the present invention;

[0044] Figure 12 This is a second schematic diagram of the locking block in an embodiment of the present invention;

[0045] Figure 13 This is one of the structural schematic diagrams of the outer sleeve in an embodiment of the present invention;

[0046] Figure 14 This is a second schematic diagram of the outer sleeve in an embodiment of the present invention;

[0047] Figure 15 for Figure 14 Schematic diagram of a partial cross-section at point III;

[0048] Figure 16 This is a schematic diagram of the inner sleeve structure in an embodiment of the present invention;

[0049] Figure 17 This is a schematic diagram of the bending and locking mechanism in an embodiment of the present invention;

[0050] Figure 18 This is one of the structural schematic diagrams of the bending locking mechanism in the unlocked state in an embodiment of the present invention;

[0051] Figure 19 This is a second schematic diagram of the bending locking mechanism in the unlocked state in an embodiment of the present invention;

[0052] Figure 20 This is one of the structural schematic diagrams of the bending locking mechanism in the locked state in an embodiment of the present invention;

[0053] Figure 21 This is a second schematic diagram of the bending locking mechanism in the locked state in an embodiment of the present invention;

[0054] Figure 22 This is a schematic diagram of the upper steering component in an embodiment of the present invention;

[0055] Figure 23 This is a schematic diagram of the steering drive shaft in an embodiment of the present invention;

[0056] Figure 24 This is one of the structural schematic diagrams of the steering drive block in an embodiment of the present invention;

[0057] Figure 25 This is a second schematic diagram of the steering drive block in an embodiment of the present invention;

[0058] Figure 26 This is a schematic diagram of the steering linkage in an embodiment of the present invention;

[0059] Figure 27 This is a schematic diagram of the upper steering housing in an embodiment of the present invention;

[0060] Figure 28 This is a schematic diagram of the structure of the lower steering housing in an embodiment of the present invention;

[0061] Figure 29 This is a cross-sectional structural diagram of the steering module in an embodiment of the present invention;

[0062] Figure 30 This is a schematic diagram of the circuit board unit in an embodiment of the present invention;

[0063] Figure 31 This is a schematic diagram of the structure of the circuit board electrode sheet in an embodiment of the present invention;

[0064] Figure 32 This is a schematic diagram of the disassembly structure of the battery pack in an embodiment of the present invention;

[0065] Figure 33 This is a schematic diagram of the battery welding assembly in an embodiment of the present invention;

[0066] Figure 34 This is a schematic diagram of the structure of the arc-shaped battery electrode sheet in an embodiment of the present invention;

[0067] Figure 35 This is a schematic diagram of the structure of the battery cover in an embodiment of the present invention;

[0068] Figure 36 This is a cross-sectional structural diagram of the battery welding assembly in an embodiment of the present invention;

[0069] Figure 37 This is a schematic diagram of the battery pack's usage status in an embodiment of the present invention;

[0070] Figure 38 This is a schematic diagram of another bending drive shaft in an embodiment of the present invention;

[0071] in:

[0072] 1. Sleeve module; 11. Pin cartridge mechanism; 111. Pin anchor; 112. Pin cartridge seat; 12. Steering control mechanism; 121. Steering control seat; 1211. Steering positioning hole; 1212. Connecting hole; 1213. Fixed gear plate; 122. Steering fixing seat; 1221. Fixing post; 1222. Receiving cavity; 12221. First limiting part; 12222. Second limiting part; 123. Cutting blade steering seat; 124. Locking block; 241. First limiting end face; 1242. Second limiting end face; 1243. Third limiting end face; 1244. Fixed protrusion; 1245. Transition plane; 125. Locking block return spring; 13. Outer sleeve; 131. Clearance groove; 132. Drive unit; 1321. First drive surface; 1322. Second drive surface; 14. Inner sleeve; 141. Second limiting surface; 142. Receiving groove; 15. Sleeve rear seat; 16. Sleeve return spring;

[0073] 2. Steering module; 21. Upper steering assembly; 211. Steering knob; 212. Steering drive shaft; 2121. Disc; 21211. Drive groove; 2122. Shaft; 213. Upper steering housing; 2131. Shaft hole; 2132. First limiting surface; 22. Lower steering housing; 221. First support rib; 222. Second support rib; 23. Steering drive block; 231. Connecting groove; 232. Support part; 233. Limiting support part; 234. Drive column; 24. Steering link; 241. Connecting part; 242. Hook; 2421. Working surface; 2442. First limiting protrusion; 2443. Second limiting protrusion;

[0074] 3. Body module; 31. Left outer shell; 32. Right outer shell; 33. Top cover; 34. Circuit board unit; 341. Support plate; 342. Circuit board electrode plate; 3421. Positioning hole; 3422. Conductive plate; 3423. Fixing hook; 3424. First connecting piece; 3425. Bending piece; 343. Guide post; 344. Guide plate; 345. Circuit board assembly; 35. Closing handle; 36. Main structure;

[0075] 4. Battery pack; 41. Battery top cover; 42. Battery welding assembly; 421. Battery middle cover; 4211. Battery compartment; 4212. Electrode compartment; 4213. Guide compartment; 422. Battery; 423. Flat battery electrode; 424. Curved battery electrode; 4241. Second connecting piece; 4242. Conductive arc piece; 4243. Guide piece; 43. Battery casing. Detailed Implementation

[0076] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0077] like Figure 1 and Figure 2 The diagram shown is a structural schematic of an embodiment of the present invention, which provides an electric stapler with a jaw bending and locking mechanism, including a sleeve module 1, a body module 3, a steering module 2 and a battery pack 4, wherein the battery pack 4 is detachably connected to the body module 3 to provide power to the entire device.

[0078] The body module 3 includes a left outer shell 31, a right outer shell 32, a top cover 33, a main structure 36, a circuit board unit 34 mounted on the main structure 36, a drive assembly for moving the cutting blade, and a closing handle 35 for closing the jaws, all mounted on the main structure 36. Figure 30 As shown, the circuit board unit 34 includes a circuit board assembly 345 and a battery connection assembly that connects the circuit board assembly 345 and the battery pack 4.

[0079] The battery connection assembly includes a battery guide and a pair of circuit board electrode plates 342 mounted on the battery guide, which are electrically connected to the battery pack 4.

[0080] The battery guide includes a support plate 341 arranged vertically, a guide post 343 perpendicularly connected to the support plate 341, and guide plates 344 disposed on both sides of the guide post 343. Figure 31As shown, the circuit board electrode 342 includes a first connecting piece 3424 mounted on a support plate 341, a bent piece 3425 bent from the first connecting piece 3424 toward the circuit board assembly 345, a conductive piece 3422 bent from the first connecting piece 3424 toward the guide plate 344, and a fixing hook 3423 disposed at the end of the conductive piece 3422 and secured to the guide plate 344. The bent piece 3425 passes through the support plate 341 and connects to the circuit board assembly 345. Two positioning protrusions are provided on the support plate 341, and positioning holes 3421 that cooperate with the positioning protrusions are provided on the first connecting piece 3414, thereby mounting the circuit board electrode 342 onto the battery guide.

[0081] like Figure 32 As shown, the battery pack 4 includes a battery casing 43, a battery welding assembly 42 disposed within the battery casing 43, and a battery cover 41 covering the battery casing 43. The battery cover 41 has guide slots through which guide posts 343 and guide plates 344 pass. Figure 33 As shown, the battery welding assembly 42 includes a battery inner cover 421, multiple batteries 422 disposed within the battery inner cover 421, a planar battery electrode plate 423 connecting the multiple batteries 422 in series, and two arc-shaped battery electrode plates 424 disposed on the positive and negative terminals of the series battery pack, as shown. Figure 35 As shown, the battery cover 421 is provided with a battery compartment 4211 for inserting multiple batteries 422, a guide compartment 4213 for inserting guide posts 343 and guide plates 344, and an electrode compartment 4212 for inserting curved battery electrode sheets 424. Figure 34 and Figure 36 As shown, the arc-shaped battery electrode 424 includes a second connecting piece 4241 connected to the positive or negative electrode of the battery, a guide piece 4243 extending to the electrode compartment 4212, and a conductive arc piece 4242 bent from the guide piece 4243 and extending to the guide compartment 4213, as shown. Figure 37 As shown, when the guide post 343 and guide plate 344 are inserted into the battery pack 4, the conductive arc plate 4242 is electrically connected to the conductive plate 3422. By placing the arc-shaped battery electrode plate 424 inside the battery pack 4, a stable connection between the battery pack 4 and the circuit board assembly 345 can be achieved, avoiding deformation caused by the arc-shaped battery electrode plate 424 being exposed.

[0082] like Figure 4 and Figure 5As shown, the sleeve module 1 includes an inner sleeve 14 fixedly connected to the main body mechanism 36, an outer sleeve 13 that moves axially relative to the inner sleeve 14, a steering control mechanism 12 disposed at the distal end of the inner sleeve 14, a staple cartridge mechanism 11 fixedly connected to the steering control mechanism 12, and a firing rod that passes through the inner sleeve 14 and is drivenly connected to the drive assembly. The distal end of the firing rod is connected to the cutting blade assembly. The staple cartridge mechanism 11 includes a staple cartridge seat 112 and a staple abutment 111 hinged to the staple cartridge seat 112. A closing assembly is provided on the outer tube 13 to cooperate with the closing handle 35. The closing assembly includes a sleeve rear seat 15 fixedly connected to the outer tube 13 and a sleeve return spring 16 disposed between the sleeve rear seat 15 and the body module 3. A hinge seat is provided on the sleeve rear seat 15 to be connected to the closing handle 35. When the closing handle 35 is operated, the closing handle 35 can push the sleeve rear seat 15, thereby pushing the outer tube 13 to the distal end. When the closing handle 35 is released, the sleeve rear seat 15 is reset under the action of the sleeve return spring 16. The above-mentioned closing assembly is the prior art, and will not be described in detail in this invention.

[0083] like Figure 6 and Figure 7 As shown, the steering control mechanism 12 includes a steering mounting base 122 fixed on the inner sleeve 14, a steering control base 121 rotatably connected to the steering mounting base 122, a cutting blade steering base 123 disposed on the steering control base 121, and a steering sleeve disposed outside the steering control base 121. Specifically, as... Figure 8 As shown, a fixing post 1221 is provided at the distal end of the steering fixing seat 122, such as... Figure 10 As shown, a steering positioning hole 1211 is provided on the steering control seat 121 for the fixed column 1221 to extend into. The steering control seat 121 and the steering fixed seat 122 are rotatably connected through the cooperation of the fixed column 1221 and the steering positioning hole 1211.

[0084] In order to achieve locking between the steering fixed seat 122 and the steering control seat 121, and thus lock the jaw steering angle, a bending locking mechanism is provided between the steering fixed seat 122 and the steering control seat 121. The bending locking mechanism includes a locking block 124 movably disposed in the steering fixed seat 122, a locking block return spring 125 sleeved on the locking block 124, and a fixed gear 1213 disposed on the steering control seat 121. The locking return spring 125 abuts between the locking block 124 and the steering fixed seat 122.

[0085] like Figure 9 As shown, a receiving cavity 1222 for inserting a locking block 124 is provided at the lower end of the steering fixing seat 122. The receiving cavity 1222 extends along the length direction of the outer sleeve 13. The locking block 124 is placed in the receiving cavity 1222 and can move along the length direction of the receiving cavity 1222. Figure 11 and Figure 12As shown, a first limiting end face 1241 is formed on the side of the locking block 124 near the steering fixing seat 122, and a second limiting end face 1242 and a third limiting end face 1243 are formed on the side of the locking block 124 near the outer sleeve 13, which are oppositely arranged. A transition plane 1245 is formed between the second limiting end face 1242 and the third limiting end face 1243. Figure 14 and Figure 15 As shown, a driving part 132 with a length shorter than the transition plane is provided on the outer tube 13. The driving part 132 is slidably disposed on the transition plane 1245 and is provided with a first driving surface 1321 that cooperates with the second limiting end face 1242 and a second driving surface 1322 that cooperates with the third limiting end face 1243.

[0086] like Figure 17 As shown, in the initial state, the transition plane 1245 is in contact with the driving part 132 and there is a gap between the first driving surface 1321 and the second limiting end surface 1242; as Figure 20 and Figure 21 As shown, when the jaws are closed, the outer sleeve 13 moves to the distal end. The outer sleeve 13 first travels a short distance without moving further. When the first driving surface 1321 abuts against the second limiting end surface 1242, the outer sleeve 13 drives the locking block 124 to move to the distal end and abut against the fixed gear plate 1213 to achieve locking. When unlocking is required, as shown... Figure 18 and Figure 19 As shown, the outer sleeve 13 moves to the proximal end under the action of the sleeve return spring 16, and the locking block 124 moves to the proximal end under the action of the locking block return spring 125. When the third limiting end face 1243 contacts the second driving surface 1322, the locking block 124 continues to reset under the action of the outer sleeve 13.

[0087] Specifically, the locking block 124 includes a body portion, a fixed protrusion 1244 disposed at the distal end of the body portion, a reset drive portion disposed at the proximal end of the body portion protruding towards the outer sleeve 13, and a locking drive portion disposed between the fixed protrusion 1244 and the reset drive portion. The fixed protrusion 1244 cooperates with the fixed gear disc 1213. A first limiting end face 1241 is formed at the end of the locking drive portion protruding towards the steering fixing seat 122, a second limiting end face 1242 is formed at the end of the locking drive portion facing the reset drive portion, and a third limiting end face 1243 is formed on the side of the reset drive portion facing the locking drive portion. A first limiting portion 12221 that cooperates with the locking block reset spring 125 and a second limiting portion 12222 that cooperates with the first limiting end face 1241 are provided within the receiving cavity 1222.

[0088] The driving part 132 is an H-shaped through groove provided on the outer wall of the outer sleeve. Two protrusions in the middle of the H-shaped through groove abut against the transition plane 1245 of the locking block 124. The side of the two protrusions facing the locking driving part forms a first driving surface 1321, and the side facing the reset driving part forms a second driving surface 1322. The H-shaped groove facilitates the pressing of the driving part 132 against the transition plane 1245. It should be understood that in other embodiments, it can also be two parallel through grooves, with the connecting part between the two through grooves recessed towards the locking block 124 and abutting against the transition plane 1245.

[0089] like Figure 29 As shown, the steering module 2 includes an upper steering assembly 21 and a lower steering housing 22 that cooperates with the upper steering assembly 21, as... Figure 22 As shown, the upper steering assembly 21 includes an upper steering housing 213, a steering drive shaft 212 rotatably disposed within the upper steering housing 213, a steering knob 211 fixed to the upper end of the steering drive shaft 212, a steering sleeve assembly disposed between the steering knob 211 and the upper steering housing 213, two steering drive blocks 23 slidably disposed on the outer sleeve 13 and symmetrically arranged, and two steering linkages 24 connecting the two steering drive blocks 23 and the steering control seat 121. Two symmetrically arranged drive grooves 21211 are provided at the lower end of the steering drive shaft 212, and drive columns 234 that cooperate with the drive grooves 21211 are provided on the steering drive blocks 23. By rotating the eccentrically arranged drive grooves 21211, the steering drive blocks 23 are driven to move along the length direction of the outer sleeve 13, so that the two steering drive blocks 23 slide in opposite directions along the length direction of the outer sleeve 13, thereby ensuring the consistency of the left and right bending angles of the jaws through the two steering linkages 24. The steering sleeve assembly includes a steering sleeve fitted on a column inside the upper steering housing 213 and located on the outer periphery of the steering drive shaft 212, and a steering sleeve spring fitted on the steering sleeve and abutting between the steering sleeve and the column. The upper end of the steering sleeve abuts against the steering knob 211.

[0090] The steering drive shaft 212 includes a shaft body 2122 and a disc body 2121 disposed at the lower end of the shaft body 2122. Two drive grooves 21211 are disposed at the lower end of the disc body 2121. The drive grooves can be V-grooves (e.g.,...). Figure 23 (as shown) or waist-shaped groove (such as) Figure 38 (As shown). A shaft post is provided on the upper steering housing 213, and a shaft hole 2131 is provided on the shaft post for the steering shaft body 2122 to pass through. A limiting protrusion is provided at the upper end of the disc body 2121, and a steering limiting groove that cooperates with the limiting protrusion is provided at the lower end of the upper steering housing 213. The steering angle is limited by the cooperation of the limiting protrusion and the steering limiting groove.

[0091] like Figure 24 and Figure 25As shown, the steering drive block 23 includes a slider portion, an arc-shaped surface disposed on the slider portion near the outer sleeve 13, a support portion 232 disposed on the arc-shaped surface and abutting against the inner sleeve 14, a connecting groove 231 disposed on the slider portion away from the drive column 234, and a limiting support portion 233 disposed on the slider portion opposite to the support portion 232. The connecting groove 231 is connected to the steering linkage 24, and the limiting support portion 233 is limited on the upper steering housing 213 and the lower steering housing 22. Specifically, the limiting support portion 233 is stepped, as shown... Figure 27 As shown, the upper steering housing 213 is provided with a first limiting surface 2132 that cooperates with the limiting support part 233, and the lower steering housing 22 is provided with a first support rib 221 that cooperates with the limiting support part 233, as shown. Figure 13 As shown, the outer tube 13 is provided with a clearance groove 131 for the support part 232 to pass through.

[0092] like Figure 26 As shown, the steering linkage 24 includes a rod body, a connecting portion 241 located at the proximal end of the rod body, and a hook 242 located at the distal end of the rod body. A connecting hole 1212 for engaging with the hook 242 is provided on the steering control seat 121. Figure 28 As shown, a second support rib 222 that cooperates with the connecting part 241 is provided on the lower steering housing 22, as shown. Figure 16 As shown, the inner sleeve 14 is provided with a second limiting surface 141 that cooperates with the connecting part 241 and the second support rib 222, and a receiving groove 142 for inserting the rod body. The hook 242 is provided with a first limiting protrusion 2442 and a second limiting protrusion 2443 arranged back and forth along the length of the rod body, and an action surface 2421 that cooperates with the connecting hole 1212.

[0093] The working principle of this invention is as follows:

[0094] After the sleeve module 1 is manufactured, the driving part 132 on the outer sleeve 13 is pressed onto the transition plane 1245 of the locking block 124. When the closing handle 35 is driven, the closing handle 35 moves the outer sleeve 13 to the distal end. Since there is a gap between the first driving surface 1321 on the outer sleeve 13 and the second limiting end face 1242 on the locking block 124, the outer sleeve 13 travels a distance without moving. When the first driving surface 1321 on the outer sleeve 13 abuts against the second limiting end face 1242 on the locking block 124, it drives the locking block 124 to move to the distal end together, so that the fixed protrusion 12... 44 abuts against the fixed gear plate 1213 to achieve locking; when unlocking is required, the closing handle 35 is released, and the outer tube 13 moves to the proximal end under the action of the sleeve return spring 16. At this time, the locking block 124 resets synchronously with the outer tube 13 under the action of the locking block return spring 125. When the locking block 124 and the fixed gear plate 1213 are too tightly fitted and cannot be reset by the locking block return spring 125, the outer tube 13 resets a distance during the free stroke. When the second driving surface 1322 on the outer tube 13 abuts against the third limiting end surface 1243 on the locking block 124, the locking block 124 is driven to reset together.

[0095] In summary, this stapler can lock the bending angle, improve the stability of the structure, and is easy to operate.

[0096] The above examples are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electric stapler with a jaw bending and locking mechanism, comprising a cannula module, the cannula module comprising an inner cannula, an outer cannula that moves axially relative to the inner cannula, a steering control mechanism disposed at the distal end of the inner cannula, and a staple cartridge mechanism fixedly connected to the steering control mechanism; The steering control mechanism includes a steering fixing seat fixed on the inner sleeve and a steering control seat rotatably connected to the steering fixing seat; Its features are, The turning locking mechanism is provided between the steering fixed seat and the steering control seat, and the turning locking mechanism includes: A locking block is disposed within the steering fixing seat and is movable relative to the steering fixing seat along the length direction of the outer sleeve. A first limiting end face is formed on the side of the locking block near the steering fixing seat. A second limiting end face and a third limiting end face are formed opposite to each other on the side of the locking block near the outer sleeve. A transition plane is formed between the second limiting end face and the third limiting end face. A driving part with a length smaller than the transition plane is provided on the outer sleeve. The driving part has a first driving surface that cooperates with the second limiting end face and a second driving surface that cooperates with the third limiting end face. The locking block includes a body portion, a fixing protrusion disposed at the distal end of the body portion, a reset drive portion disposed at the proximal end of the body portion and protruding toward the outer sleeve, and a locking drive portion disposed between the fixing protrusion and the reset drive portion. The fixing protrusion cooperates with the fixing gear plate. The end of the locking drive portion protruding toward the steering fixed seat forms the first limiting end face, the end of the locking drive portion facing the reset drive portion forms the second limiting end face, and the side of the reset drive portion facing the locking drive portion forms the third limiting end face. The driving part is an H-shaped through groove provided on the outer wall of the outer sleeve. The side of the H-shaped through groove facing the locking driving part forms the first driving surface and the side facing the reset driving part forms the second driving surface. A locking block return spring is sleeved on the locking block and abuts against the locking block and the steering fixing seat; A fixed gear disc is mounted on the steering control seat and engages with the locking block; In the initial state, the transition plane is in contact with the driving part, and there is a gap between the first driving surface and the second limiting end face. When the jaws are closed, the outer sleeve moves to the distal end. The outer sleeve first travels a distance without moving, and when the first driving surface abuts against the second limiting end face, the outer sleeve drives the locking block to move to the distal end and abut against the fixed gear plate to achieve locking. When unlocking is required, the outer sleeve moves to the proximal end, and the locking block moves to the proximal end under the action of the locking block return spring. When the third limiting end face contacts the second driving surface, the locking block continues to reset under the action of the outer sleeve.

2. The electric stapler with jaw bending and locking mechanism according to claim 1, characterized in that: It also includes a steering module, which includes an upper steering assembly and a lower steering housing that cooperates with the upper steering assembly. The upper steering assembly includes an upper steering housing, a steering drive shaft rotatably disposed within the upper steering housing, a steering knob fixed to the upper end of the steering drive shaft, a steering sleeve assembly disposed between the steering knob and the upper steering housing, two steering drive blocks slidably disposed on the outer sleeve and symmetrically arranged, and two steering linkages connecting the two steering drive blocks and the steering control seat. The lower end of the steering drive shaft is provided with two symmetrically arranged drive grooves, and the steering drive blocks are provided with drive columns that cooperate with the drive grooves.

3. The electric stapler with jaw bending and locking mechanism according to claim 2, characterized in that: The steering drive block includes a slider portion, an arc-shaped surface disposed on the slider portion near one end of the outer sleeve, a support portion disposed on the arc-shaped surface and abutting against the inner sleeve, a connecting groove disposed on the slider portion away from the drive column, and a limiting support portion disposed on the slider portion and arranged opposite to the support portion. The connecting groove is connected to the steering linkage, and the limiting support portion is limited on the upper steering housing and the lower steering housing.

4. The electric stapler with jaw bending and locking mechanism according to claim 3, characterized in that: The upper steering housing is provided with a first limiting surface that cooperates with the limiting support portion, and the lower steering housing is provided with a first supporting rib that cooperates with the limiting support portion.

5. The electric stapler with jaw bending and locking mechanism according to claim 4, characterized in that: The steering linkage includes a rod body, a connecting part disposed at the near end of the rod body, and a hook disposed at the far end of the rod body. The steering control seat is provided with a connecting hole that mates with the hook. The lower steering housing is provided with a second support rib that mates with the connecting part. The inner sleeve is provided with a second limiting surface that mates with the connecting part and the second support rib, and a receiving groove for inserting the rod body.

6. The electric stapler with jaw bending and locking mechanism according to claim 1, characterized in that: It also includes a device body module and a battery pack. The device body module includes a circuit board assembly and a battery connection assembly connecting the circuit board assembly and the battery pack. The battery connection assembly includes a battery guide and a pair of battery plate electrode plates mounted on the battery guide. The pair of battery plate electrode plates are electrically connected to the battery pack.

7. The electric stapler with jaw bending and locking mechanism according to claim 6, characterized in that: The battery guide includes a support plate arranged in a vertical direction, a guide post perpendicularly connected to the support plate, and guide plates disposed on both sides of the guide post. The battery panel electrode includes a first connecting piece mounted on the support plate, a bent piece bent from the first connecting piece toward the circuit board assembly, a conductive piece bent from the first connecting piece toward the guide plate, and a fixing hook disposed at the end of the conductive piece and secured to the guide plate.

8. The electric stapler with jaw bending and locking mechanism according to claim 7, characterized in that: The battery pack includes a battery casing, a battery welding assembly disposed inside the battery casing, and a battery cover covering the battery casing. The battery welding assembly includes a battery cover, multiple batteries disposed within the battery cover, a planar battery electrode sheet connecting the multiple batteries in series, and an arc-shaped battery electrode sheet disposed on the positive and negative terminals of the series battery pack. The battery cover is provided with a battery compartment for inserting the multiple batteries, a guide compartment for inserting the guide post and guide plate, and an electrode sheet compartment for inserting the arc-shaped battery electrode sheet. The arc-shaped battery electrode sheet includes a second connecting piece connected to the positive or negative electrode of the battery, a guide piece extending to the electrode sheet compartment, and a conductive arc sheet that bends from the guide piece and extends to the guide compartment.

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