Novel bending module and anastomat with same

Abstract

The invention discloses a novel bending module and an anastomat with the novel bending module. The novel bending module comprises a steering shell; a fixed disc; bending the driving shaft; the steering knob has an angle rotation range relative to the turning driving shaft, when the steering knob is located in the middle position of the angle rotation range, the turning driving shaft is in a locked state, and when the steering knob rotates to the two ends of the angle rotation range, the turning driving shaft is in an unlocked state and rotates along with the steering knob; the rotary knob resetting piece enables the steering rotary knob to have a tendency of resetting to a locking state; the locking mechanism comprises an elastic driving disc assembly and an elastic positioning assembly, the elastic positioning assembly penetrates through the fixing disc to abut against the elastic driving disc assembly, in the locking state, the driving disc assembly is located at the first position in the axial direction and meshed with the fixing disc, and the elastic driving disc assembly moves to the second position and is separated from the fixing disc to be in the unlocking state; the elastic drive disc assembly has the tendency to reset to the first position. The bending module provided by the invention is convenient to operate, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a novel bending module and an anastomosis device having the same. Background Technology

[0002] The electric laparoscopic stapler, an upgraded version of the traditional manual laparoscopic stapler, is mainly used in various surgical procedures for the transection, anastomosis, and resection of organs or tissues. Compared to manual staplers, the electric stapler offers a smoother cutting process and better staple formation.

[0003] Anastomosing devices primarily rely on staples to suture the incision for hemostasis. When anastomosing thinner tissues such as blood vessels, it's crucial to prevent the jaws from vibrating and tearing the tissue. Chinese patent CN 104546048 B proposes a jaw locking mechanism that utilizes the free travel between a steering knob and a drive shaft to achieve both locking and unlocking of the jaws. However, in this design, the steering knob and drive shaft cannot automatically reset after each misalignment, meaning the position of the steering knob cannot accurately reflect the true state of the jaws, potentially leading to misjudgment by the physician. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide a novel bending module and a stapler having the same, wherein a single bending module can realize the turning and locking of the jaws.

[0005] To overcome the shortcomings of the prior art, one of the technical solutions provided by the present invention is:

[0006] A novel bending module includes:

[0007] Steering housing;

[0008] A fixed disk is fixedly disposed relative to the steering housing;

[0009] A bending drive shaft is rotatably configured relative to the steering housing and coaxially arranged with the fixed disk;

[0010] A steering knob is connected to the bending drive shaft to drive the bending drive shaft to rotate. The steering knob has an angular rotation range relative to the bending drive shaft. When the steering knob is located in the middle position of the angular rotation range, the bending drive shaft is in a locked state. When the steering knob is rotated to both ends of the angular rotation range, the bending drive shaft is in an unlocked state and rotates with the steering knob.

[0011] A knob reset element is disposed between the bending drive shaft and the steering knob, the knob reset element causing the steering knob to tend to reset to the locked state;

[0012] The locking mechanism includes an elastic drive disk assembly disposed between the steering knob and the fixed disk, and an elastic positioning assembly disposed outside the fixed disk. The elastic positioning assembly passes through the fixed disk and abuts against the elastic drive disk assembly. When the bending drive shaft is in a locked state, the drive disk assembly is in a first position in the axial direction and engages with the fixed disk. When the steering knob is rotated to both ends of the angular rotation range, the elastic drive disk assembly moves away from the steering knob to a second position and disengages from the fixed disk. The elastic drive disk assembly has a tendency to return to the first position.

[0013] A linear output component is connected to the bending drive shaft and outputs linear displacement under the drive of the bending drive shaft.

[0014] In one embodiment, the elastic drive disk assembly includes a drive disk coaxially arranged with and axially movable relative to the bending drive shaft, and a drive disk return spring abutting between the fixed disk and the drive disk. The drive disk has at least two drive protrusions arranged radially, and the steering knob has a slot that engages with the drive protrusions. When the steering knob is in the locked state, the drive protrusions are in the slots. When the steering knob moves to the unlocked state, the drive protrusions disengage from the slots, and the steering knob drives the drive disk to move to the second position.

[0015] In one embodiment, the drive disk includes a disk body and a column body, the drive protrusion is disposed on the disk body, the column body is provided with a plurality of positioning grooves that cooperate with the elastic positioning component, and a claw that cooperates with the fixed disk is installed on the side of the column body opposite to the plurality of positioning grooves.

[0016] In one embodiment, the inner periphery of the fixed disk is provided with a limiting ring that cooperates with the drive disk, and a plurality of limiting grooves and clearance areas that cooperate with the claw. When the elastic drive disk assembly is in the first position, the claw engages with the limiting groove. When the elastic drive disk assembly is in the second position, the claw moves to the clearance area.

[0017] The fixed plate is provided with a positioning channel through which the elastic positioning component passes;

[0018] The outer periphery of the fixed disk is provided with multiple limiting ribs that cooperate with the steering housing.

[0019] In one embodiment, the knob reset element is a torsion spring, which is arranged between the steering knob and the drive disc and has its two ends fixed to the bending drive shaft and the steering knob, respectively.

[0020] In one embodiment, the elastic positioning assembly includes a positioning member and a positioning spring disposed between the positioning member and the steering housing. The positioning member includes a body portion and a positioning end portion disposed at one end of the body portion. The body portion has a spring mounting hole for inserting the positioning spring, and the positioning end portion is toothed.

[0021] In one embodiment, the steering housing includes an upper steering housing and a lower steering housing, the bending drive shaft is rotatably disposed on the upper steering housing, and the straight output assembly is disposed between the upper steering housing and the lower steering housing.

[0022] In one embodiment, the bending drive shaft includes a disc portion and a shaft portion. The disc portion is disposed at the lower end of the upper steering housing, and the shaft portion extends to the upper part of the upper steering housing. The shaft portion has two steering limiting grooves arranged along the length direction and a fan-shaped shaft hole at the upper part that provides the angular rotation range. The steering knob is pin-shafted and limited within the fan-shaped shaft hole. The drive disc has a guide hole through which the shaft portion passes, and the guide hole has a guide hole protrusion that mates with the steering positioning groove.

[0023] In one embodiment, the straight output component includes a turning drive block slidably disposed between the upper steering housing and the lower steering housing, and a steering linkage connecting the turning drive block. The turning drive block is provided with a drive column, and the disc body is provided with an eccentrically arranged drive groove that cooperates with the drive column.

[0024] To overcome the shortcomings of the prior art, the second technical solution provided by this invention is:

[0025] A stapler includes the bending module described in any one of the above claims, wherein the linear output component is connected to the jaws of the stapler.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] 1. A single bending module can realize the turning and locking of the jaws. It has a simple structure, is stable and reliable, and is easy to operate.

[0028] 2. After the steering knob drives the bending drive shaft to rotate, it can be reset to the locked state, so that the steering knob and the jaws are in the same state, avoiding misoperation by the doctor;

[0029] 3. Steering is achieved using a single steering linkage, resulting in a simple structure and good stability. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the structure of a stapler according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of a section at point I in the middle;

[0033] Figure 3 for Figure 1 Enlarged view of section II in the middle;

[0034] Figure 4 This is a schematic diagram of the bending module in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the steering knob in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the knob reset component in an embodiment of the present invention;

[0037] Figure 7 This is one of the structural schematic diagrams of the drive disk in an embodiment of the present invention;

[0038] Figure 8 This is a second schematic diagram of the drive disk structure in an embodiment of the present invention;

[0039] Figure 9 This is one of the structural schematic diagrams of the fixed disk in an embodiment of the present invention;

[0040] Figure 10 This is a second schematic diagram of the structure of the fixed disk in an embodiment of the present invention;

[0041] Figure 11 This is one of the structural schematic diagrams of the bending drive shaft in an embodiment of the present invention;

[0042] Figure 12 This is a second schematic diagram of the bending drive shaft in an embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of the claw structure in an embodiment of the present invention;

[0044] Figure 14 This is one of the structural schematic diagrams of the positioning component in an embodiment of the present invention;

[0045] Figure 15This is a second schematic diagram of the positioning component in an embodiment of the present invention;

[0046] Figure 16 This is one of the structural schematic diagrams of the upper steering housing in an embodiment of the present invention;

[0047] Figure 17 This is a second schematic diagram of the upper steering shell in an embodiment of the present invention;

[0048] Figure 18 This is a schematic diagram of the structure of the lower steering housing in an embodiment of the present invention.

[0049] Figure 19 This is a schematic diagram of the steering control mechanism in an embodiment of the present invention;

[0050] Figure 20 This is a schematic diagram of the steering linkage in an embodiment of the present invention;

[0051] Figure 21 This is one of the structural schematic diagrams of the bending drive block in an embodiment of the present invention;

[0052] Figure 22 This is a second schematic diagram of the bending drive block in an embodiment of the present invention;

[0053] Figure 23 This is one of the structural schematic diagrams of the bending drive shaft in a locked state in an embodiment of the present invention;

[0054] Figure 24 This is a second schematic diagram of the structure in which the bending drive shaft is in a locked state in an embodiment of the present invention;

[0055] Figure 25 This is the third schematic diagram of the structure in which the bending drive shaft is in a locked state in an embodiment of the present invention;

[0056] Figure 26 This is the fourth schematic diagram of the structure in which the bending drive shaft is in a locked state in an embodiment of the present invention;

[0057] Figure 27 This is one of the structural schematic diagrams of the bending drive shaft in the unlocked state in an embodiment of the present invention;

[0058] Figure 28 This is a second schematic diagram of the structure in which the bending drive shaft is in the unlocked state in an embodiment of the present invention;

[0059] Figure 29 This is the third schematic diagram of the structure of the bending drive shaft in the unlocked state in an embodiment of the present invention;

[0060] Figure 30 This is the fourth schematic diagram of the structure in which the bending drive shaft is in the unlocked state in an embodiment of the present invention;

[0061] in:

[0062] 111. Steering knob; 1111. Drive shaft mounting hole; 11111. Fan-shaped protrusion; 1112. Reset part receiving groove; 11121. Second locking groove; 1113. Slot; 1114. Drive disk limiting surface; 112. Knob reset part; 1121. Positioning end; 1122. Limiting end; 1123. Drive shaft through hole; 1131. Drive disk; 11311. Disk body; 113111. Drive protrusion; 11312. Reset part clearance hole; 11313. Guide hole; 113131. Guide hole protrusion; 11314. Column; 113141. Positioning groove; 113142. Claw mounting groove; 1132. Claw; 11321. Limiting part; 11322. Mounting part; 1141. Positioning part; 11411. Positioning end; 11 412. Main body; 11413. Spring mounting hole; 1142. Positioning spring; 115. Drive disc return spring; 116. Fixed disc; 1161. Limiting ring; 11611. Limiting groove; 1162. Limiting rib; 1163. Clearance area; 1164. Positioning channel; 117. Bend drive shaft; 1171. Shaft body; 11711. Steering limiting groove; 11712. Sector-shaped limiting surface; 11713. Sector-shaped shaft hole; 11714. First locking groove; 1172. Disc body; 11721. Drive groove; 118. Upper steering housing; 1181. Mounting groove; 11811. Limiting slot; 1182. Shaft hole; 1183. Positioning mounting area; 1184. Disc mounting area; 119. Pin; 12. Lower steering housing; 121. Support rib;

[0063] 2. Steering control mechanism; 21. Steering control seat; 211. Drive shaft; 22. Cutting blade steering seat; 23. Steering fixing seat; 231. Fixing column;

[0064] 31. Bending drive block; 311. Drive column; 312. Limiting part; 313. Connecting pin; 314. Sliding plane; 32. Steering link; 321. Waist-shaped groove; 322. Connecting hole; Detailed Implementation

[0065] 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.

[0066] like Figure 1The diagram shown is a structural schematic of an embodiment of the present invention, providing a stapler including a bending module and a cannula module. The cannula module includes an inner cannula, an outer cannula that moves axially relative to the inner cannula, a steering control mechanism 2 disposed at the distal end of the inner cannula, and a staple cartridge mechanism disposed on the steering control mechanism 2. Figure 2 and Figure 19 As shown, the steering control mechanism 2 includes a steering fixed seat 23, a steering control seat 21 rotatably connected to the steering fixed seat 23, and a cutting blade steering seat 22. A fixed post 231 is provided on the steering fixed seat 23, and a rotatable connection hole that cooperates with the fixed post 231 is provided on the steering control seat 21.

[0067] like Figure 4 As shown, the bending module includes a steering housing, a fixed plate 116 fixedly mounted on the steering housing, a bending drive shaft 117 rotatably mounted relative to the steering housing, a steering knob 111 fixedly connected to the bending drive shaft 117, a knob reset component 112 disposed between the bending drive shaft 117 and the steering knob 111, a locking mechanism, and a linear output component. The linear output component is driven by the bending drive shaft 117 and connected to the steering control seat 21. The steering knob 111 drives the bending drive shaft 117 to rotate, thereby driving the linear output component to output linear displacement, which in turn drives the jaws to rotate.

[0068] like Figure 5 As shown, the steering knob 111 has a pivot shaft 119 connected to the bending drive shaft 117. The steering knob 111 has an angular rotation range relative to the bending drive shaft 117. When the steering knob 111 is in the middle position of the angular rotation range, the bending drive shaft 117 is in a locked state. When the steering knob 111 rotates to both ends of the angular rotation range, the bending drive shaft 117 is in an unlocked state and rotates with the steering knob 111.

[0069] The locking mechanism includes an elastic drive disk assembly disposed between the steering knob 111 and the fixed disk 116, and an elastic positioning assembly disposed outside the fixed disk 116. The elastic positioning assembly passes through the fixed disk 116 and abuts against the elastic drive disk assembly. When the bending drive shaft 117 is in the locked state, the elastic drive disk assembly is in the first position in the axial direction and engages with the fixed disk 116. When the steering knob 111 is rotated to both ends of the angular rotation range, the elastic drive disk assembly moves away from the steering knob 111 to the second position and disengages from the fixed disk 116. At this time, the bending drive shaft 117 is in the unlocked state.

[0070] The elastic drive disc assembly includes a drive disc 1131 coaxially arranged with and axially movable relative to the bending drive shaft 117, and a drive disc return spring 115. Specifically, as shown... Figure 7 and Figure 8As shown, the drive disk 1131 includes a disk body 11311 and a column 11314. The drive disk reset spring 115 is sleeved on the column 11314 and abuts between the disk body 11311 and the fixed disk 116. The drive disk reset spring 115 makes the drive disk 1131 tend to reset to the first position. Two radially arranged drive protrusions 11311 are provided at one end of the disc body 11311 near the steering knob 111. At the same time, the steering knob 111 is provided with a groove 1113 that cooperates with the drive protrusions 11311. When the steering knob 111 is in the locked state, the drive protrusions 11311 are in the groove 1113. When the steering knob 111 moves to the unlocked state, the steering knob 111 rotates relative to the drive disc 1131, causing the drive protrusions 11311 to disengage from the groove 1113. Thus, the drive protrusions 11311 apply axial pressure to the drive disc 1131, driving the drive disc 1131 to move to the second position.

[0071] The column 11314 is provided with multiple positioning grooves 113141 that cooperate with the elastic positioning component. On the side of the column 11314 opposite to the multiple positioning grooves 113141, a claw 1132 that cooperates with the fixed disk 116 is installed. Specifically, the fixed disk 116 is provided with a claw mounting groove 113142, such as... Figure 13 As shown, the claw 1132 includes a mounting part 11322 and a limiting part 11321.

[0072] The steering housing includes an upper steering housing 118 and a lower steering housing 12 that are detachably connected. A bend drive shaft 117 is rotatably mounted on the upper steering housing 118 and extends above the upper steering housing 12. A steering knob 111 abuts against the upper end of the upper steering housing 118.

[0073] The fixed plate 116 is fixedly mounted on the upper steering housing 118, such as Figure 9 and Figure 10 As shown, a plurality of limiting ribs 1162 are provided on the outer periphery of the fixed plate 116, and an installation groove 1181 for the fixed plate 116 to be inserted is provided on the upper steering shell 118. At the same time, a plurality of limiting slots 11811 matching the plurality of limiting ribs 1162 are provided on the inner wall of the installation groove 1181.

[0074] The fixed disk 116 has a limiting ring 1161 that cooperates with the drive disk 1131 on its inner periphery, as well as a plurality of limiting grooves 11611 and clearance areas 1163 that cooperate with the claws 1132. When the elastic drive disk assembly is in the first position, the claws 1132 engage with the limiting grooves 11611. When the elastic drive disk assembly is in the second position, the claws 1132 move to the clearance area 1163 and disengage from the limiting grooves 11611. The fixed disk 116 also has a positioning channel 1164 through which the elastic positioning assembly passes.

[0075] The elastic positioning assembly includes a positioning element 1141 and a positioning spring 1142 disposed between the positioning element 1141 and the steering housing, such as Figure 14 and Figure 15 As shown, the positioning component 1141 includes a main body 11412 and a positioning end 11411 disposed at one end of the main body 11412. The main body 11412 is provided with a spring mounting hole 11413 for the positioning spring 1142 to be inserted. At the same time, the lower end of the upper steering housing 118 is provided with a positioning mounting area 1183 for the elastic positioning component to be inserted. The positioning end 11411 is toothed and can cooperate with the positioning groove 113141 to realize the positioning of the drive disk 1131. When the drive disk 1131 rotates, it is also convenient to apply force to the positioning end 11411 to move the positioning end 11411 away from the drive disk 1131.

[0076] like Figure 11 and Figure 12 As shown, the bending drive shaft 117 includes a disc body portion 1172 and a shaft body portion 1171. A disc mounting area 1184 is located at the lower end of the upper steering housing 118 for the disc body portion 1172 to be inserted. Figure 16 and Figure 17 As shown, the upper steering housing 118 is provided with a shaft hole 1182 for the shaft body portion 1171 to pass through, the disc body portion 1172 is provided at the lower end of the upper steering housing 118, and the shaft body portion 1171 extends to the upper part of the upper steering housing 118. The shaft body 1171 is provided with two steering limiting grooves 11711 arranged along the length direction and a fan-shaped shaft hole 11713 providing an angular rotation range at the upper part. The steering knob 111 is limited by the pin shaft 119 in the fan-shaped shaft hole 11713. The drive disk 1131 is provided with a guide hole 11313 through which the shaft body 1171 passes. The guide hole 11313 is provided with a guide hole protrusion 113131 that cooperates with the steering limiting groove 11711. Thus, the drive disk 1131 can move axially relative to the bending drive shaft 117 and can rotate with the bending drive shaft 117. The outer periphery of the guide hole 11313 is also provided with a reset member clearance hole 11312 for the knob reset member 112 to be inserted.

[0077] like Figure 6 As shown, the knob reset member 112 is a torsion spring, and its two ends are fixed on the bending drive shaft 117 and the steering knob 111 respectively. A drive shaft through hole 1123 for the shaft body 1171 to pass through is provided in the middle of the knob reset member 112.

[0078] Two opposing sector-shaped limiting surfaces 11712 are also provided on the upper part of the shaft body 1171. One of the sector-shaped limiting surfaces 11712 is provided with a first locking groove 11714 for the positioning end 1121 of the knob reset component 112 to be inserted. At the lower end of the steering knob 111, there is a drive shaft mounting hole 1111 for the shaft body 1171 to be inserted, a sector-shaped protrusion 11111 provided on the inner wall of the drive shaft mounting hole 1111 that cooperates with the two sector-shaped limiting surfaces 11712, a reset component receiving groove 1112 for the knob reset component 112 to be inserted, a drive disk limiting surface 1114 that cooperates with the disk body 11311, and a second locking groove 11121 for the limiting end 1122 of the knob reset component 112 to be inserted. The size of the sector-shaped limiting surface 11712 is larger than the sector-shaped protrusion 11111. The slot 1113 is arranged on the drive limiting surface 1114.

[0079] like Figure 3 As shown, the linear output assembly includes a bending drive block 31 slidably disposed between the upper steering housing 118 and the lower steering housing 12, and a steering linkage 32 connecting the bending drive block 31 and the steering control seat 21. A drive column 311 is provided on the bending drive block 31, and a drive groove 11721 eccentrically arranged and cooperating with the drive column 311 is provided on the disc portion 1172. For example, the drive groove 11721 can be a V-groove. The bending drive block 31 has an arc-shaped surface that slides with the outer sleeve. Limiting portions 312 are provided at both ends of the bending drive block 31, and a sliding plane 314 is formed between the limiting portions 312 and the arc-shaped surface. Correspondingly, as... Figure 18 As shown, the lower steering housing 12 has a support rib 121 that mates with the sliding plane 314, and the upper steering housing 118 has a limiting surface that mates with the limiting part 312. To facilitate the connection between the bending drive block 31 and the steering linkage 32, the bending drive block 31 has a connecting pin 313 extending downwards towards the steering housing 12. Figure 20 As shown, the near end of the steering link 31 is provided with a connecting hole 322 that mates with the connecting pin 313, and the far end of the steering link 31 is provided with a waist-shaped groove 321 that mates with the drive shaft 211 on the steering control seat 21.

[0080] The working principle of this invention is as follows:

[0081] In the initial state, such as Figures 23 to 26 As shown, the steering knob 111 is positioned in the middle of the fan-shaped shaft hole 11713 on the bending drive shaft 117. The drive protrusion 113111 of the drive disc 1131 is located in the slot 1113 of the steering knob 111, and the drive disc 1131 is in the first position. The pawl 1132 on the drive disc 1131 engages with the fixed disc 116, and the positioning member 1141 abuts against the drive disc 1131. At this time, the bending drive shaft 117 is locked and cannot rotate. Figure 27 Figure 30As shown, rotating the steering knob 111 by a certain angle positions it at both ends of the fan-shaped shaft hole 11713. During this process, the rotation of the steering knob 111 causes the drive protrusion 113111 to disengage from the slot 1113. The steering knob 111 applies force to the drive protrusion 113111, causing the drive disk 1131 to move to the second position. The pawl 1132 on the drive disk 1131 disengages from the fixed disk 116. At this time, the bending drive shaft 117 is in the unlocked state, and the steering knob 111 can drive the bending drive shaft 117 to rotate. The rotation of the drive disk 1131 causes the positioning member 1141 to move away from the drive disk 11711. 31. The bending drive shaft 117 moves the bending drive block 31 along the outer sleeve axis. The steering linkage 32 drives the jaws to turn. After the turn is completed, the steering knob 111 is released. The steering knob 111 is reset to the middle position of the fan-shaped shaft hole 11713 under the action of the knob reset member 112. At the same time, the drive disk 1131 moves to the first position in the direction of the steering knob 111 under the action of the drive disk reset spring 115 and the drive protrusion 113111 is locked in the slot 1113. The positioning member 1141 abuts against the drive disk 1131 under the action of the positioning spring 1142 to complete the locking of the bending angle.

[0082] In summary, the steering knob of this bending module keeps consistent with the position of the jaws, making operation convenient and improving work efficiency.

[0083] 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. A novel bending module, characterized in that, include: Steering housing; A fixed disk is fixedly disposed relative to the steering housing; A bending drive shaft is rotatably configured relative to the steering housing and coaxially arranged with the fixed disk; A steering knob is connected to the bending drive shaft to drive the bending drive shaft to rotate. The steering knob has an angular rotation range relative to the bending drive shaft. When the steering knob is located in the middle position of the angular rotation range, the bending drive shaft is in a locked state. When the steering knob is rotated to both ends of the angular rotation range, the bending drive shaft is in an unlocked state and rotates with the steering knob. A knob reset element is disposed between the bending drive shaft and the steering knob, the knob reset element causing the steering knob to tend to reset to the locked state; The locking mechanism includes an elastic drive disk assembly disposed between the steering knob and the fixed disk, and an elastic positioning assembly disposed outside the fixed disk. The elastic positioning assembly passes through the fixed disk and abuts against the elastic drive disk assembly. When the bending drive shaft is in a locked state, the elastic drive disk assembly is in a first position in the axial direction and engages with the fixed disk. When the steering knob is rotated to both ends of the angular rotation range, the elastic drive disk assembly moves away from the steering knob to a second position and disengages from the fixed disk. The elastic drive disk assembly has a tendency to return to the first position. A linear output component is connected to the bending drive shaft and outputs linear displacement under the drive of the bending drive shaft.

2. The novel bending module according to claim 1, characterized in that: The elastic drive disk assembly includes a drive disk coaxially arranged with the bending drive shaft and axially movable relative to the bending drive shaft, and a drive disk return spring abutting between the fixed disk and the drive disk. The drive disk has at least two drive protrusions arranged radially, and the steering knob has a slot that cooperates with the drive protrusions. When the steering knob is in the locked state, the drive protrusions are in the slots. When the steering knob moves to the unlocked state, the drive protrusions disengage from the slots, and the steering knob drives the drive disk to move to the second position.

3. The novel bending module according to claim 2, characterized in that: The drive plate includes a plate body and a column body. The drive protrusion is disposed on the plate body. The column body is provided with a plurality of positioning grooves that cooperate with the elastic positioning component. A claw that cooperates with the fixed plate is installed on the side of the column body opposite to the plurality of positioning grooves.

4. The novel bending module according to claim 3, characterized in that: The inner circumference of the fixed disk is provided with a limiting ring that cooperates with the drive disk, and multiple limiting grooves and clearance areas that cooperate with the claw. When the elastic drive disk assembly is in the first position, the claw engages with the limiting groove. When the elastic drive disk assembly is in the second position, the claw moves to the clearance area. The fixed plate is provided with a positioning channel through which the elastic positioning component passes; The outer periphery of the fixed disk is provided with multiple limiting ribs that cooperate with the steering housing.

5. The novel bending module according to claim 2, characterized in that: The knob reset component is a torsion spring, which is arranged between the steering knob and the drive disc, with its two ends fixed to the bending drive shaft and the steering knob, respectively.

6. The novel bending module according to claim 1, characterized in that: The elastic positioning component includes a positioning element and a positioning spring disposed between the positioning element and the steering housing. The positioning element includes a body portion and a positioning end portion disposed at one end of the body portion. The body portion is provided with a spring mounting hole for the positioning spring to be inserted, and the positioning end portion is toothed.

7. The novel bending module according to claim 1, characterized in that: The steering housing includes an upper steering housing and a lower steering housing. The bending drive shaft is rotatably mounted on the upper steering housing, and the straight output assembly is disposed between the upper steering housing and the lower steering housing.

8. The novel bending module according to claim 7, characterized in that: The bending drive shaft includes a disc body and a shaft body. The disc body is located at the lower end of the upper steering housing, and the shaft body extends to the upper part of the upper steering housing. The shaft body has two steering limiting grooves arranged along the length direction and a fan-shaped shaft hole at the upper part that provides the angular rotation range. The steering knob is pin-shafted and limited in the fan-shaped shaft hole. The drive disc has a guide hole through which the shaft body passes, and the guide hole has a guide hole protrusion that cooperates with the steering positioning groove.

9. The novel bending module according to claim 8, characterized in that: The linear output assembly includes a turning drive block slidably disposed between the upper steering housing and the lower steering housing, and a steering linkage connecting the turning drive block. The turning drive block is provided with a drive column, and the disc body is provided with an eccentrically arranged drive groove that cooperates with the drive column.

10. A stapler, characterized in that: Includes the bending module as described in any one of claims 1 to 9, wherein the linear output component is connected to the jaws of the anastomosis device.

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