Jaw bending locking mechanism and electric anastomat thereof

Abstract

The invention discloses a jaw bending locking mechanism and an electric anastomat thereof.The jaw bending locking mechanism comprises a jaw locking piece movably arranged in a steering fixing seat, the far end of the jaw locking piece is provided with a positioning protrusion, a steering control seat is provided with a plurality of positioning slope grooves matched with the positioning protrusion, and the positioning slope grooves are matched with the positioning protrusion; a concave transition face is arranged at the end, facing the outer sleeve, of the middle of the jaw locking piece, a first locking end face and a second locking end face are formed at the two ends of the transition face in the length direction, a locking part protruding towards the transition face is arranged on the outer sleeve, and a mounting groove matched with the jaw locking piece is formed in the steering fixing base. A sliding limiting part through which the near end of the jaw locking piece penetrates is arranged in the mounting groove; and the locking piece limiting spring is arranged on the jaw locking part in a sleeving mode and located between the jaw locking piece and the sliding limiting part, and the locking piece limiting spring enables the positioning protrusion to have the tendency to be close to the positioning slope groove. According to the jaw bending locking mechanism and the electric anastomat with the jaw bending locking mechanism, accurate steering can be achieved, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a jaw bending locking mechanism and an electric anastomat. BACKGROUND

[0002] In actual clinical application, the doctor will adjust the deflection angle of the anastomat jaw according to the needs, and when the appropriate angle is adjusted, a locking mechanism is needed to keep the jaw angle of the anastomat, otherwise the jaw of the anastomat will appear to be deflected during the cutting process of the cutting knife, which may cause bleeding of the anastomotic stoma and affect the safety of the operation.

[0003] Chinese patent CN120420029A proposes a jaw locking mechanism, the principle of which is that when the jaw is closed, the locking assembly moves forward under the action of the spring, the locking part of the locking assembly is engaged with the matching part of the angle turning piece, thereby realizing the locking function of the jaw; when the jaw is opened, the limiting part on the outer sleeve drives the locking assembly to reset against the force of the spring, thereby making the locking part of the locking assembly disengage with the matching part of the angle turning piece. The anastomat is in a floating state at a certain angle when the jaw is opened, and the jaw can be freely deflected, but the turning angle of the jaw cannot be accurately controlled. SUMMARY

[0004] Based on the above problems, the present application aims to provide a jaw bending locking mechanism and an electric anastomat, which can avoid deflection when the jaw is opened and improve the turning accuracy.

[0005] In order to overcome the shortcomings of the prior art, one of the technical solutions provided by the present application is: The jaw bending locking mechanism comprises a turning fixed seat fixedly connected with an inner sleeve and a turning control seat rotationally connected with the turning fixed seat, and further comprises: A jaw locking piece is movably arranged in the turning fixed seat, a positioning protrusion is arranged at the distal end of the jaw locking piece, a plurality of positioning inclined surface grooves are arranged on the turning control seat and matched with the positioning protrusion, a recessed transition surface is arranged at one end of the jaw locking piece facing the inner sleeve, first and second locking end faces are formed at the length direction ends of the transition surface, a locking part protruding towards the transition surface is arranged on the outer sleeve, an installation groove matched with the jaw locking piece is arranged on the turning fixed seat, and a sliding limiting part is arranged in the installation groove and passes through the proximal end of the jaw locking piece; A locking piece limiting spring is sleeved on the jaw locking part and located between the jaw locking piece and the sliding limiting part, and the locking piece limiting spring makes the positioning protrusion have a tendency to approach the positioning inclined surface groove; When the steering mechanism is not operated, the positioning protrusion abuts in the positioning slope groove; when the steering mechanism is operated, the steering control seat rotates under the steering mechanism, the positioning slope groove pushes the positioning protrusion to move away from the steering control seat against the action of the locking part limiting spring, until the positioning protrusion is disengaged from the positioning slope groove to complete the rotation of the jaw, when the next positioning slope groove enters the axis position of the jaw locking part, the positioning protrusion is engaged with the positioning slope groove again to complete the positioning of the steering; when the jaw is closed, the outer sleeve moves towards the steering control seat, the locking part slides along the transition surface, and when the locking part abuts against the second locking end surface, the jaw locking part cannot move away from the steering control seat, completing the locking of the jaw.

[0006] In one of the embodiments, the jaw locking part comprises a first locking part, a second locking part and a third locking part arranged in sequence from the proximal end to the distal end of the inner sleeve, the outer diameter of the second locking part is larger than that of the first locking part and the third locking part, the locking part limiting spring abuts between the second locking part and the sliding limiting part, the transition surface is arranged on the second locking part, the installation groove is provided with a locking surface matched with the distal end of the second locking part, and the distal end of the installation groove is provided with a through groove for the positioning protrusion to extend out.

[0007] In one of the embodiments, the sliding limiting part is two guide bosses arranged on the inner wall of the installation groove, and the first locking part is slidingly arranged between the two guide bosses.

[0008] In one of the embodiments, the positioning protrusion is sawtooth-shaped, and the included angle between the two side groove surfaces of the positioning slope groove is 40-90 degrees.

[0009] In one of the embodiments, the steering mechanism comprises a lower steering shell, an upper steering assembly matched with the lower steering shell, two driving sliders slidingly arranged on the outer sleeve and symmetrically arranged, and a steering pull rod connecting the driving sliders and the steering control seat, the upper steering assembly comprises an upper steering shell, a steering driving shaft rotatingly arranged in the upper steering shell, and a steering handle fixedly connected with the upper end of the steering driving shaft, the lower end of the rotating shaft is provided with two driving grooves symmetrically arranged, and the driving slider is provided with a driving column matched with the driving groove.

[0010] In one of the embodiments, the steering driving shaft comprises an installation part, a rotating part and a bending driving part connected in sequence from top to bottom, the installation part is fixedly connected with the steering handle, the rotating part is rotationally matched with the upper steering shell, and the bending driving part abuts against the upper end of the driving slider and is provided with the two driving grooves.

[0011] In one of the embodiments, the distal end of the steering pull rod is provided with a steering pull hook and the proximal end is provided with a pull rod fixing block, the driving slider is provided with a pull rod fixing slot matched with the pull rod fixing block, and the steering control seat is provided with a pull hook fixing hole matched with the steering pull hook.

[0012] In one of the embodiments, the steering control seat is fixed with an integrated limiting spring, which comprises a body part, a cutting knife limiting part arranged at the middle of the body part, and a nail holder limiting part symmetrically arranged at both sides of the cutting knife limiting part and extending to the distal end, and the nail holder limiting part and the cutting knife limiting part have a spacing in the width direction of the body part.

[0013] In one of the embodiments, the cutting knife limiting part is an arc-shaped spring bent towards the steering control seat, and the nail holder limiting part is a double-V-shaped spring continuously bent from the distal end of the body part.

[0014] In order to overcome the deficiencies of the prior art, the technical solution two of the present application provides: The electric anastomat comprises the jaw bending and locking mechanism of any one of the above.

[0015] In the above technical solution, the proximal end refers to the end far away from the patient during operation, and the distal end refers to the end close to the patient during operation.

[0016] Compared with the prior art, the present application has the following advantages: 1. When the jaw completes a certain angle of steering, the positioning protrusion can be abutted on the positioning inclined groove under the action of the locking piece limiting spring, so as to avoid the swing of the jaw, accurately control the steering angle, and further improve the precision of the operation. When the jaw is closed, the locking part on the outer sleeve abuts on the jaw locking piece, and the locking of the jaw is completed. The jaw bending and locking mechanism has simple structure, convenient operation, and high control precision. 2. The integrated limiting spring on the steering fixing seat can limit the cutting knife and the nail holder respectively, and the nail holder limiting part is a continuous bending structure, which can effectively improve the fatigue characteristics of the spring and maintain high elasticity after multiple pressing. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0018] Figure 1 It is a structural schematic view of the jaw bending and locking mechanism embodiment of the present application. Figure 2 Structure diagram of a second embodiment of the present application; Figure 3 Structure diagram of a first embodiment of the present application; Figure 2 Structure diagram of a second embodiment of the present application; Figure 4 Structure diagram of a first embodiment of the present application; Figure 5 Structure diagram of a second embodiment of the present application; Figure 6 Structure diagram of a first embodiment of the present application; Figure 7 Structure diagram of a second embodiment of the present application; Figure 8 Structure diagram of a first embodiment of the present application; Figure 9 Structure diagram of a first embodiment of the present application; Figure 10 Structure diagram of a second embodiment of the present application; Figure 9 Enlarged view of a first part in the structure diagram; Figure 11 Structure diagram of a first embodiment of the present application; Figure 12 Structure diagram of a second embodiment of the present application; Figure 13 Structure diagram of a first embodiment of the present application; Figure 14 Structure diagram of a second embodiment of the present application; Figure 13 Enlarged view of a second part in the structure diagram; Figure 15 Structure diagram of a first embodiment of the present application; Figure 16 Structure diagram of a second embodiment of the present application; Figure 17 Structure diagram of a first embodiment of the present application; Figure 18 Structure diagram of a second embodiment of the present application; Figure 17 Enlarged view of a third part in the structure diagram; Figure 19 Structure diagram of a first embodiment of the present application; Figure 20 Structure diagram of a second embodiment of the present application; Figure 21 Structure diagram of a first embodiment of the present application; Figure 22 Structure diagram of a first embodiment of the present application; Figure 23This is a schematic diagram of the integrated limiting spring in an embodiment of the present invention; Figure 24 This is a reference diagram showing the usage state of the integrated limiting spring in an embodiment of the present invention; in: 111. Upper steering assembly; 1111. Steering handle; 11111. Mounting hole; 1112. Upper steering housing; 11121. Through hole; 111221. Positioning end face; 111222. Positioning side; 1113. Steering drive shaft; 11131. Mounting part; 11132. Rotating part; 11133. Steering drive part; 11133a. Drive groove; 112. Lower steering housing; 1121. Support rib; 121. Drive slider; 1211. Drive column; 1212. Tie rod fixing groove; 1213. Limiting support part; 122. Steering tie rod; 1221. Steering hook; 1222. Tie rod fixing block; 123. Outer sleeve; 1231. First locking surface; 1232. Second locking surface; 124. Cutting blade; 1241. Spring pressing surface; 13. Steering control mechanism; 131. Steering control seat; 1311. Hook fixing hole; 1312. Control seat mounting hole; 1313. Positioning inclined groove; 132. Steering fixing seat; 1321. Mounting groove; 1321a. Sliding limit part; 1321b. Locking surface; 1322. Fixing post; 133. Jaw locking element; 1331. First locking part; 1332. Second locking part; 1332a. Transition surface; 1332b. First locking end face; 1332c. Second locking end face; 1332d. Stepped structure; 1333. Third locking part; 1333a. Positioning protrusion; 134. Locking element limiting spring; 2. Stamp cartridge mechanism; 21. Stamp seat; 22. Stamp cartridge seat; 23. Integrated limiting spring; 231. Cutting blade limiting part; 232. Stamp seat limiting part. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 3 The diagram shown is a structural schematic of an embodiment of the present invention, which provides a jaw bending and locking mechanism, which is installed on the sleeve module of an electric stapler and is used for locking after the jaws are bent.

[0021] like Figure 17As shown, the sleeve module comprises an inner sleeve fixedly connected with the anastomat body, an outer sleeve 123 axially moving relative to the inner sleeve, a steering control mechanism 13 arranged at the distal end of the inner sleeve, a staple cartridge mechanism 2 connected with the steering control mechanism 13, and a firing rod penetrating through the inner sleeve and drivingly connected with the driving assembly, the distal end of the firing rod being connected with the cutting knife assembly, the steering control mechanism 13 comprising a steering fixed seat 132 fixedly connected with the inner sleeve and a steering control seat 131 rotatably connected with the steering fixed seat 132, and the staple cartridge mechanism 2 comprising a staple cartridge seat 22 and a staple abutting seat 21 hingedly connected with the staple cartridge seat 22.

[0022] A closing assembly cooperating with the closing handle is arranged on the outer sleeve 123, the closing assembly comprising a sleeve rear seat fixedly connected with the outer sleeve 123 and a sleeve reset spring arranged between the sleeve rear seat and the body module, and a hinged seat connected with the closing handle being arranged on the sleeve rear seat, when the closing handle is operated, the closing handle can push the sleeve rear seat to move the outer sleeve 123 distally, and when the closing handle is released, the sleeve rear seat is reset under the action of the sleeve reset spring, the above-mentioned closing assembly is prior art, and thus no further description is made herein.

[0023] The jaw bending and locking mechanism comprises the steering fixed seat 132 fixedly connected with the inner sleeve, the steering control seat 131 rotatably connected with the steering fixed seat 132, the jaw locking member 133 movably arranged in the steering fixed seat 132, and the locking member limiting spring 134 sleeved on the jaw locking member 133.

[0024] As shown in Figure 4 and Figure 5 , the jaw locking member 133 is a long rod structure, a positioning protrusion 1333a is arranged at the distal end of the jaw locking member 133, a plurality of positioning inclined grooves 1313 cooperating with the positioning protrusion 1333a are arranged on the steering control seat 131, a recessed transition surface 1332a is arranged at one end of the jaw locking member 133 facing the outer sleeve 123, the length direction of the transition surface 1332a forms a first locking end surface 1332b and a second locking end surface 1332c between the two ends, a locking portion protruding towards the transition surface 1332a is arranged on the outer sleeve 123, that is, the locking portion slides between the first locking end surface 1332b and the second locking end surface 1332c. An installation groove 1321 cooperating with the jaw locking member 133 is arranged on the steering fixed seat 132, and a sliding limiting portion 1321a for the proximal end of the jaw locking member 133 to pass through is arranged in the installation groove 1321.

[0025] As shown in Figure 9 and Figure 10The locking part is an H-shaped through groove provided on the outer wall of the outer sleeve 123. Two protrusions in the middle of the H-shaped through groove are recessed and form a first locking surface 1231 that mates with the first locking end face 1332b and a second locking surface 1232 that mates with the second locking end face 1332c. Figure 11 As shown, when the jaws are in the open state, the first locking surface 1231 abuts against the first locking end face 1332b, as... Figure 12 As shown, when the jaws are closed, the outer sleeve 123 moves along the inner sleeve toward the distal end until the second locking surface 1232 abuts against the second locking end face 1332c, so that the jaw locking member 133 cannot move toward the proximal end, thus completing the locking of the jaws.

[0026] The locking spring 134 abuts between the jaw locking member 133 and the sliding limiting part 1231a. The locking spring 134 causes the positioning protrusion 1333a to tend to approach the positioning inclined groove 1313. That is, when the jaw does not bend, the positioning protrusion 1333a abuts in the positioning inclined groove 1313, which can prevent the jaw from swinging.

[0027] Specifically, the jaw locking member 133 includes a first locking part 1331, a second locking part 1332, and a third locking part 1333 arranged sequentially from the proximal end to the distal end of the inner sleeve. The outer diameter of the second locking part 1332 is larger than that of the first locking part 1331 and the third locking part 1333, that is, a stepped structure 1332d is formed between the second locking part 1332 and the first locking part 1331 and the third locking part 1333. The locking member limiting spring 134 abuts between the second locking part 1332 and the sliding limiting part 1321a. The transition surface 1332a is provided on the second locking part 1332. A locking surface 1321b that cooperates with the distal end of the second locking part 1332 is provided in the mounting groove 1321 to control the tightness of the fit between the positioning protrusion 1333a and the positioning inclined groove 1313, so that the jaws remain stable while also meeting the requirements for turning.

[0028] like Figure 6 and Figure 7 As shown, a fixing post 1322 is provided at the distal end of the steering fixing seat 132, and the steering control seat 131 is rotatably mounted on the fixing post 1322, as shown. Figure 8 As shown, multiple positioning inclined grooves 1313 are arranged in an arc shape on the steering control seat 131. At the far end of the mounting groove 1321, there is a through groove for the positioning protrusion 1333a to extend out. The through groove is arranged opposite to the fixing post 1322. The jaw locking member 133 is placed in the mounting groove. Under the action of the locking member limiting spring 134, the positioning protrusion 1333a extends out through the through groove and abuts against the positioning inclined groove 1313.

[0029] In this example, the positioning protrusion 1333a is a zigzag structure, and the included angle of the two side surfaces of the positioning inclined groove 1313 is 40-90 degrees. This structure can ensure the positioning cooperation between the positioning protrusion 1333a and the positioning inclined groove 1313, and ensure the smooth bending of the jaw.

[0030] The sliding limiting part 1321a is two guide bosses arranged in the mounting groove 1321, the first locking part 1331 is slidably arranged between the two guide bosses, and the locking part limiting spring 134 abuts against the step structure 1332d on the jaw locking part 133.

[0031] As shown in the Figures 13 to 16 The steering mechanism for controlling the rotation of the jaw is arranged on the electric anastomat, and the steering mechanism includes a lower steering housing 112, an upper steering assembly 111 matched with the lower steering housing 112, two driving sliding blocks 121 symmetrically arranged and slidably arranged on the outer sleeve 123, and a steering pull rod 12 connecting the driving sliding blocks 121 and the steering control seat 131.

[0032] The upper steering assembly 111 includes an upper steering housing 1112, a steering driving shaft 1113 rotatably arranged in the upper steering housing 1112, and a steering handle 1111 fixedly connected with the upper end of the steering driving shaft 1113. The lower end of the steering driving shaft 1113 is provided with two driving grooves 11133a symmetrically arranged, and the driving sliding blocks 121 are provided with driving columns 1211 matched with the driving grooves 11133a. The steering handle 1111 drives the steering driving shaft 1113 to rotate, and then the eccentrically arranged driving grooves 11133a drive the driving sliding blocks 121 to slide along the outer sleeve 123.

[0033] Specifically, the steering driving shaft 1113 includes an installation part 11131, a rotating part 11132 and a bending driving part 11133 connected in sequence from top to bottom. The outer diameters of the installation part 11131, the rotating part 11132 and the bending driving part 11133 gradually increase. The installation part 11131 is fixedly connected with the steering handle 1111, and the rotating part 11132 is rotatably matched with the upper steering housing 1112. An installation hole 11111 is arranged on the steering handle 1111 for the installation part 11131 to pass through, and a through hole 11121 is arranged on the upper steering housing 1112 for the rotating part 11132 to pass through. The bending driving part 11133 abuts against the upper end of the driving sliding block 121 and is provided with two driving grooves 11133a. The driving grooves 11133a can be V-shaped grooves or waist-shaped grooves.

[0034] As shown in the Figure 19 and Figure 20As shown in the drawings, the driving slider 121 is provided with an arc surface matched with the outer sleeve 123 on the radially inner side of the outer sleeve 123, and a sliding support part is arranged on the arc surface, and a sliding guide groove is arranged on the outer sleeve 123 for the sliding support part to extend into, the sliding support part abuts on the inner sleeve through the sliding guide groove, a limiting support part 1213 is arranged on the driving slider 121 and is arranged opposite to the sliding support part and is in a stepped shape, a support rib 1121 abutting on the lower end of the limiting support part 1213 is arranged on the lower turning outer shell 112, and a positioning end surface 111221 abutting on the upper end surface of the driving slider 121 and a positioning side surface 111222 abutting on the side surface of the limiting support part 1213 are arranged on the upper turning outer shell 1112. In order to facilitate the connection with the turning pull rod 122, a turning pull rod fixing part is arranged on the lower part of the driving slider 121.

[0035] As shown in the drawings, Figure 17 、 Figure 18 and Figure 21 As shown in the drawings, the turning pull rod 122 is arranged in the sliding groove on the inner sleeve, a turning pull hook 1221 is arranged on the distal end of the turning pull rod 122, and a pull rod fixing block 1222 is arranged on the proximal end, a pull rod fixing groove 1212 matched with the pull rod fixing block 1222 is arranged on the pull rod fixing part, and a pull hook fixing hole 1311 matched with the turning pull rod 122 is arranged on the turning control seat 131, the pull rod fixing block 1222 is fixed in the pull rod fixing groove 1212, and the turning pull hook 1221 is fixed in the pull hook fixing hole 1311, so that the connection between the driving slider 121 and the turning control seat 131 is realized.

[0036] As shown in the drawings, Figure 23 and Figure 24 As shown in the drawings, the turning control seat 131 is fixed with an integrated limiting spring 23 at the bottom, the integrated limiting spring 23 comprises a body part, a cutting knife limiting part 231 arranged at the middle of the body part, and a nail seat limiting part 232 symmetrically arranged at both sides of the cutting knife limiting part 231 and extending to the distal end, and the nail seat limiting part 232 and the cutting knife limiting part 231 are provided with a space in the width direction of the body part.

[0037] Specifically, the cutting knife limiting part 231 is an arc spring bent towards the direction close to the turning control seat 131, and a spring pressing surface 1241 matched with the cutting knife limiting part 231 is arranged on the cutting knife 124, and the nail seat limiting part 232 is a double-V-shaped spring continuously bent from the distal end of the body part, and the shape of the nail seat limiting part 232 can effectively improve the fatigue characteristics of the spring, and the spring can still maintain high elasticity after being pressed for many times.

[0038] The application also discloses an electric anastomat comprising the jaw bending and locking mechanism.

[0039] The working principle of the application is as follows: When the steering mechanism is not operated, the positioning protrusion 1333a is abutted in the positioning slope groove 1313 under the action of the locking member limiting spring 134; when the steering mechanism is operated, the steering control seat 131 is rotated under the action of the rotating mechanism, the positioning slope groove 1313 pushes the positioning protrusion 1333a to move away from the steering control seat 131 against the action of the locking member limiting spring 134, until the positioning protrusion 1333a is disengaged from the positioning slope groove 1313 to complete the rotation of the jaw, when the next positioning slope groove 1313 enters the axis position of the jaw locking member 133, the positioning protrusion 1333a is engaged with the positioning slope groove 1313 again to complete the positioning of the steering; as shown in Figure 12 When the jaw is closed, the outer sleeve 123 moves towards the steering control seat 131, the locking portion slides along the transition surface 1332a, when the second locking surface 1232 of the locking portion abuts on the second locking end surface 1332c on the jaw locking member 133, the jaw locking member 133 cannot move away from the steering control seat 131, and the locking of the jaw is completed.

[0040] In summary, the jaw bending and locking mechanism can accurately control the angle of bending, and improve the bending accuracy and efficiency.

[0041] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable the person skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered in the protection scope of the present application.

Claims

1. A jaw bending and locking mechanism, comprising a steering fixing seat fixedly connected to an inner sleeve and a steering control seat rotatably connected to the steering fixing seat, characterized in that, Also includes: A jaw locking component is movably disposed in the steering fixing seat. The distal end of the jaw locking component has a positioning protrusion. The steering control seat has multiple positioning inclined grooves that cooperate with the positioning protrusion. The middle part of the jaw locking component facing the outer tube has a recessed transition surface. The two ends of the transition surface in the length direction form a first locking end face and a second locking end face. The outer tube has a locking part that protrudes towards the transition surface. The steering fixing seat has a mounting groove that cooperates with the jaw locking component. The mounting groove has a sliding limiting part that allows the proximal end of the jaw locking component to pass through. A locking member limiting spring is sleeved on the jaw locking part and located between the jaw locking member and the sliding limiting part. The locking member limiting spring causes the positioning protrusion to tend to approach the positioning inclined groove. When the steering mechanism is not operated, the positioning protrusion abuts against the positioning inclined groove. When the rotation mechanism is operated, the steering control seat rotates under the drive of the rotation mechanism, and the positioning inclined groove pushes the positioning protrusion to move away from the steering control seat against the action of the locking member's limiting spring until the positioning protrusion disengages from the positioning inclined groove, completing the rotation of the jaws. When the next positioning inclined groove enters the axial position of the jaw locking member, the positioning protrusion engages with the positioning inclined groove again to complete the positioning of the steering. When the jaws are closed, the outer sleeve moves towards the steering control seat, and the locking part slides along the transition surface. When the locking part abuts against the second locking end face, the jaw locking member cannot move away from the steering control seat, completing the locking of the jaws.

2. The jaw bending and locking mechanism according to claim 1, characterized in that: The jaw locking member includes a first locking part, a second locking part, and a third locking part arranged sequentially from the proximal end to the distal end of the inner sleeve. The outer diameter of the second locking part is larger than that of the first locking part and the third locking part. The locking member limiting spring abuts between the second locking part and the sliding limiting component. The transition surface is provided on the second locking part. The mounting groove is provided with a locking surface that mates with the distal end of the second locking part. The distal end of the mounting groove is provided with a through groove for the positioning protrusion to extend out.

3. The jaw bending and locking mechanism according to claim 1, characterized in that: The sliding limiting part consists of two guide bosses disposed on the inner wall of the mounting groove, and the first locking part is slidably disposed between the two guide bosses.

4. The jaw bending and locking mechanism according to claim 1, characterized in that: The positioning protrusion is serrated, and the included angle between the two sides of the positioning inclined groove is 40 to 90 degrees.

5. The jaw bending and locking mechanism according to claim 1, characterized in that: The steering mechanism includes a lower steering housing, an upper steering assembly that cooperates with the lower steering housing, two drive sliders that are slidably disposed on the outer sleeve and symmetrically arranged, and a steering tie rod connecting the drive sliders and the steering control seat; The upper steering assembly includes an upper steering housing, a steering drive shaft rotatably disposed within the upper steering housing, and a steering handle fixedly connected to the upper end of the steering drive shaft. The lower end of the steering drive shaft is provided with two symmetrically arranged drive slots, and the drive slider is provided with a drive column that cooperates with the drive slots.

6. The jaw bending and locking mechanism according to claim 5, characterized in that: The steering drive shaft includes a mounting part, a rotating part, and a bending drive part connected sequentially from top to bottom. The mounting part is fixedly connected to the steering handle, the rotating part is rotatably engaged with the upper steering housing, and the bending drive part abuts against the upper end of the drive slider and is provided with the two drive grooves.

7. The jaw bending and locking mechanism according to claim 5, characterized in that: The steering tie rod has a steering hook at its distal end and a tie rod fixing block at its proximal end. The drive slider has a tie rod fixing groove that mates with the tie rod fixing block. The steering control seat has a hook fixing hole that mates with the steering hook.

8. The jaw bending and locking mechanism according to claim 1, characterized in that: An integrated limiting spring is fixed on the steering control seat. The integrated limiting spring includes a body part, a cutting blade limiting part disposed in the middle of the body part, and a pin seat limiting part symmetrically arranged on both sides of the cutting blade limiting part and extending to the distal end. There is a gap between the pin seat limiting part and the cutting blade limiting part in the width direction of the body part.

9. The jaw bending and locking mechanism according to claim 8, characterized in that: The cutting blade limiting part is an arc-shaped spring piece bent towards the steering control seat, and the anvil limiting part is a double V-shaped spring piece formed by continuous bending of the far end of the main body.

10. An electric stapler, characterized in that: Includes the jaw bending locking mechanism as described in any one of claims 1 to 9.

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