Steering mechanism and endoscope anastomat

Abstract

The utility model provides a steering mechanism and an endoscope anastomat. An elastic clamping and stopping part comprises a sleeve embedded in a steering gear disc, a stopping ball arranged in the sleeve in a rolling mode and an elastic piece arranged in the sleeve to elastically abut against the stopping ball towards the inner wall of a positioning sleeve. A plurality of elastic clamping parts are arranged on a steering gear disc, the elastic clamping parts are arranged in the circumferential direction of the steering gear disc at equal intervals, a plurality of positioning grooves are formed in the inner wall of a positioning sleeve in the circumferential direction of the positioning sleeve at equal intervals, and the number of the positioning grooves is two times that of the elastic clamping parts; when the stop balls are embedded into the corresponding positioning grooves, a positioning groove is reserved between every two adjacent stop balls, so that the steering gear disc has good stability in the rotating process, friction between the steering gear disc and the positioning sleeve can be reduced, the jamming and contusion feeling existing in the gear switching process is eliminated, and the stability of the steering gear disc is improved. And the smoothness during gear switching is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a steering mechanism and a laparoscope stapler. Background Art

[0002] Laparoscopic surgery uses modern photography technology and high-tech surgical instruments and equipment to complete complex chest / abdominal operations with minimally invasive surgical techniques under chest / abdominal wall cannulas or tiny incisions. During the operation, the doctor makes 3 to 4 small holes with a diameter of about 0.5 cm in the patient's chest / abdominal wall. A micro camera is placed in one of the holes, which is connected to a TV screen, while scissors, forceps, staplers and other surgical instruments are placed in the other small holes in the chest / abdominal wall. The operation process is basically the same as open surgery. The doctor looks at the screen and performs a series of operations such as clamping, stapling and cutting the diseased tissue to complete the operation. In order to improve the flexibility of the laparoscopic stapler, the stapling component of the laparoscopic stapler is usually connected to a steering mechanism, and the medical staff rotates the stapling component by turning the steering mechanism.

[0003] At present, the steering mechanism of the laparoscopic stapler usually realizes the interference fit between the steering gear plate and the positioning sleeve by the elastic force of the torsion spring, and realizes the rotation and locking at any angle by the friction between the steering gear plate and the positioning sleeve. However, in the process of the steering gear plate rotating relative to the positioning sleeve, the outer diameter of the torsion spring is prone to increase or decrease, and the steering gear plate has a sense of jamming and frustration when switching gears, resulting in a relatively stiff steering feel. It is generally difficult to accurately and quickly rotate the anastomosis assembly to the required gear angle, which brings inconvenience to the doctor's operation or easily causes misoperation, affecting the use of the laparoscopic stapler. Utility Model Content

[0004] Based on the above-mentioned problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a steering mechanism to solve the problem that the steering gear plate of the steering mechanism for a laparoscopic stapler existing in the prior art has a sticking and frustrating feeling when switching gears, resulting in a stiff steering feel, which brings inconvenience to the doctor's operation or is prone to misoperation.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a steering mechanism, including:

[0006] The housing is provided with a hole extending axially along a first direction;

[0007] A positioning sleeve, fixedly mounted on the housing and located in the hole, a plurality of positioning grooves are provided on the inner wall of the positioning sleeve, and the plurality of positioning grooves are arranged at equal intervals along the circumference of the positioning sleeve;

[0008] A steering gear plate, rotatably disposed in the positioning sleeve;

[0009] A first linkage assembly, used for driving the steering gear plate to rotate circumferentially relative to the positioning sleeve, the first linkage assembly being rotatably mounted on the housing;

[0010] a second linkage assembly, slidably disposed in the housing along a second direction, the second direction being perpendicular to the first direction; the second linkage assembly is connected to the first linkage assembly, so that when the first linkage assembly rotates, the second linkage assembly is actuated by the first linkage assembly to slide along the second direction; and

[0011] The elastic locking component comprises a sleeve embedded on the steering gear plate, a stop ball rollingly arranged in the sleeve, and an elastic member arranged in the sleeve to elastically push the stop ball toward the inner wall of the positioning sleeve;

[0012] Among them, a plurality of the elastic locking components are provided on the steering gear plate, and the plurality of the elastic locking components are arranged at equal intervals along the circumference of the steering gear plate, and the number of the positioning grooves is twice the number of the elastic locking components, so that when the stop ball of each elastic locking component is embedded in the corresponding positioning groove, a positioning groove is left between each two adjacent stop balls.

[0013] Furthermore, the positioning groove is a tooth groove extending along the first direction, the length of the tooth groove is equal to the length of the positioning sleeve, the width of the tooth groove is greater than or equal to the diameter of the stop ball, and the depth of the tooth groove is less than or equal to the radius of the stop ball.

[0014] Furthermore, the first linkage assembly includes a steering shaft for driving the steering gear plate to rotate, a steering knob for driving the steering shaft to rotate, and a rotating disk for actuating the second linkage assembly, the steering gear plate is provided with a fitting hole extending axially along the first direction, the steering shaft is inserted into the fitting hole, one end of the steering shaft facing away from the housing is connected to the steering knob, and the other end of the steering shaft is connected to the rotating disk.

[0015] Furthermore, a necked sleeve is provided on a surface of the steering gear plate facing the steering knob, and the necked sleeve is communicated with the sleeve hole, so that when the steering shaft is inserted into the sleeve hole, the necked sleeve is sleeved on the steering shaft.

[0016] Furthermore, a clamping portion is provided on the inner wall of the necked sleeve and / or the hole wall of the sleeve hole, and a clamping groove for cooperating and clamping with the clamping portion is provided on the outer wall of the steering shaft.

[0017] Further, the steering mechanism further includes a bushing cover for positioning the steering gear plate in the positioning sleeve, and the bushing cover is detachably connected to the housing.

[0018] Further, a limiting member is provided on the steering knob, and an arc-shaped limiting groove for restricting the limiting member to move along a predetermined path to define the rotation angle range of the steering knob is provided on the bushing cover, and one end of the limiting member facing away from the steering knob is slidably inserted into the arc-shaped limiting groove.

[0019] Further, the second linkage assembly includes a swivel pin provided at the bottom of the rotating disc, a swivel pull block slidably disposed in the housing along a second direction, and a hook provided on the swivel pull block. The central axis of the swivel pin is parallel and offset from the central axis of the steering shaft. A kidney-shaped hole extending in a third direction is provided on the swivel pull block. The third direction is perpendicular to the first direction and perpendicular to the second direction, and the swivel pin is slidably inserted into the kidney-shaped hole.

[0020] Further, the stop sphere is a steel ball, a plastic ball or a ceramic ball, and the elastic member is a spring.

[0021] Another object of the embodiments of the present invention is to provide a laparoscopic stapler to solve the technical problems in the prior art that the steering gear plate of the steering mechanism of the laparoscopic stapler has a jamming and jerky feeling during gear shifting, resulting in a relatively rigid steering feel, which brings inconvenience to the doctor's operation or is prone to misoperation.

[0022] To achieve the above object, the technical solution adopted by the present invention is: to provide a laparoscopic stapler, including the steering mechanism provided in any of the above embodiments.

[0023] One or more of the above technical solutions in the embodiments of the present invention, compared with the prior art, have at least one of the following beneficial effects:

[0024] The steering mechanism and laparoscopic stapler in the embodiment of the utility model, because the elastic locking component includes a sleeve embedded on the steering gear plate, a stop ball rollingly set in the sleeve, and an elastic member set in the sleeve to elastically push the stop ball toward the inner wall of the positioning sleeve. By arranging a plurality of elastic locking components on the steering gear plate, the plurality of elastic locking components are arranged at equal intervals along the circumference of the steering gear plate, and a plurality of positioning grooves are arranged at equal intervals on the inner wall of the positioning sleeve and along the circumference thereof, and the number of positioning grooves is twice the number of elastic locking components, when each stop ball is embedded in the corresponding positioning groove, a positioning groove is vacant between each two adjacent stop balls, which not only makes the steering gear plate have better stability during the rotation process, but also reduces the friction between the steering gear plate and the positioning sleeve, eliminates the feeling of jamming and frustration when the gear is switched, enhances the silky smoothness when the gear is switched, brings convenience to the doctor's operation and is conducive to eliminating misoperation. In addition, the steering gear plate is relatively stable during the gear shifting process without shaking, which makes it easy for doctors to accurately and quickly rotate the anastomosis component to the required gear angle during clinical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A schematic cross-sectional view of a steering mechanism provided in an embodiment of the utility model;

[0027] Figure 2 An assembly diagram of a steering gear plate and a positioning sleeve provided in an embodiment of the utility model;

[0028] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure after the center steering gear plate and the positioning sleeve are assembled;

[0029] Figure 4 for Figure 2 A schematic diagram of the top view of the structure after the center steering gear plate and the positioning sleeve are assembled;

[0030] Figure 5 for Figure 2 A schematic cross-sectional view of the center steering gear plate and the positioning sleeve after assembly;

[0031] Figure 6 A schematic diagram of the structure of the elastic locking component provided in an embodiment of the utility model;

[0032] Figure 7Exploded view of the steering shaft and the steering gear position plate provided by the embodiment of the present utility model;

[0033] Figure 8 Exploded view of the housing and the steering knob provided by the embodiment of the present utility model;

[0034] Figure 9 Schematic perspective view of the positioning sleeve provided by the embodiment of the present utility model;

[0035] Figure 10 Schematic perspective view of the shaft sleeve cover provided by the embodiment of the present utility model;

[0036] Figure 11 Exploded view of the steering mechanism provided by the embodiment of the present utility model.

[0037] Among them, each reference numeral in the figure:

[0038] 1 - housing; 11 - hole position; 12 - stepped hole;

[0039] 2 - positioning sleeve; 21 - positioning groove;

[0040] 3 - steering gear position plate; 31 - receiving hole; 32 - sleeving hole; 33 - necking sleeve; 34 - clamping portion;

[0041] 4 - first linkage component; 41 - steering shaft; 42 - steering knob; 43 - rotating disk; 44 - clamping groove;

[0042] 5 - second linkage component; 51 - swivel pin; 52 - swivel pull block; 53 - hook; 54 - waist-shaped hole;

[0043] 6 - elastic locking component; 61 - sleeve; 62 - stop sphere; 63 - elastic member;

[0044] 7 - shaft sleeve cover; 71 - arc-shaped limiting groove;

[0045] 8 - limiting member; 9 - steering lock; 91 - lock tongue; 10 - lock groove. Detailed implementation manners

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0047] It should be noted that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more unless otherwise specifically defined. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appearing throughout the specification are not necessarily all referring to the same embodiment. Additionally, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0049] Please refer to Figures 1 to 11 , and now the steering mechanism provided by the embodiments of the present utility model will be described. Please further refer to Figure 1 , Figure 2 , Figure 3 and Figure 11, the steering mechanism provided by the embodiment of the present utility model includes a housing 1, a positioning sleeve 2, a steering gear disc 3, a first linkage assembly 4, a second linkage assembly 5, and an elastic locking component 6. The housing 1 is provided with a hole 11 extending axially in the first direction. The positioning sleeve 2 is fixedly installed on the housing 1 and is located in the hole 11. A plurality of positioning grooves 21 are provided on the inner wall of the positioning sleeve 2, and the plurality of positioning grooves 21 are arranged at equal intervals along the circumferential direction of the positioning sleeve 2. The steering gear disc 3 is rotatably arranged in the positioning sleeve 2. The first linkage assembly 4 is rotatably installed on the housing 1, and the steering gear disc 3 can be driven to rotate circumferentially relative to the positioning sleeve 2 through the first linkage assembly 4. The second linkage assembly 5 is slidably arranged in the housing 1 along the second direction. It should be noted that the second direction is perpendicular to the first direction. The second linkage assembly 5 is connected to the first linkage assembly 4 so that when the first linkage assembly 4 rotates, the second linkage assembly 5 is actuated through the first linkage assembly 4 to slide the second linkage assembly 5 along the second direction, thereby controlling the steering link to drive the kiss-cutting assembly to rotate through the second linkage assembly 5. Please further refer to Figure 4 , Figure 5 , Figure 6 and Figure 11 , the elastic locking component 6 includes a sleeve 61 embedded in the steering gear disc 3, a stop sphere 62 rotatably arranged in the sleeve 61, and an elastic member 63 arranged in the sleeve 61 to elastically abut the stop sphere 62 against the inner wall of the positioning sleeve 2. Among them, a plurality of elastic locking components 6 are provided on the steering gear disc 3, and the plurality of elastic locking components 6 are arranged at equal intervals along the circumferential direction of the steering gear disc 3, and the number of the positioning grooves 21 is twice the number of the elastic locking components 6 arranged, so that when each stop sphere 62 is embedded in the corresponding positioning groove 21, a positioning groove 21 is vacated between every two adjacent stop spheres 62. It should be noted that a receiving hole 31 for receiving the sleeve 61 is provided on the outer peripheral surface of the steering gear disc 3. The sleeve 61 is fixedly installed in the receiving hole 31, and the end surface of the sleeve 61 close to the positioning sleeve 2 is flush with the outer peripheral surface of the steering gear disc 3.

[0050] When the steering mechanism provided by the embodiment of the utility model is operated, the doctor rotates the first linkage assembly 4, and the first linkage assembly 4 drives the steering gear plate 3 to rotate relative to the positioning sleeve 2. The first linkage assembly 4 simultaneously actuates the second linkage assembly 5 to reciprocate in the housing 1, and then controls the steering connecting rod to drive the kissing assembly to rotate through the second linkage assembly 5. Until the doctor adjusts the kissing assembly to a suitable position, since the inner wall of the positioning sleeve 2 is provided with a plurality of positioning grooves 21, when each elastic locking component 6 on the steering gear plate 3 is aligned with the corresponding positioning groove 21, the stop ball 62 of each elastic locking component 6 is embedded and locked in the corresponding positioning groove 21 of the positioning sleeve 2 under the elastic force of the elastic member 63. At this time, under the action of the mutual locking of the plurality of elastic locking components 6 and the plurality of positioning grooves 21, the steering gear plate 3 cannot rotate and remains in the first gear. When the doctor needs to adjust the angle position of the anastomosis assembly again, he only needs to rotate the first linkage assembly 4, so that the steering gear plate 3 drives each elastic locking component 6 to disengage from the corresponding positioning groove 21, and when the anastomosis assembly is adjusted to another suitable position, the multiple elastic locking components 6 and the multiple positioning grooves 21 are locked with each other again, and the steering gear plate 3 cannot rotate and remains in the second gear. By analogy, the steering gear plate 3 can be positioned in multiple different gears, so that the adjustment of different angle gears of the anastomosis assembly can be achieved.

[0051] Compared with the prior art, the steering mechanism provided by the embodiment of the utility model has an elastic locking component 6 including a sleeve 61 embedded in the steering gear plate 3, a stop ball 62 rollingly set in the sleeve 61, and an elastic member 63 arranged in the sleeve 61 to elastically push the stop ball 62 toward the inner wall of the positioning sleeve 2. By providing a plurality of elastic locking components 6 on the steering gear disc 3, the plurality of elastic locking components 6 are arranged at equal intervals along the circumference of the steering gear disc 3, and a plurality of positioning grooves 21 are provided at equal intervals on the inner wall of the positioning sleeve 2 and along its circumference, and the number of positioning grooves 21 is twice the number of the elastic locking components 6, when each stop ball 62 is embedded in the corresponding positioning groove 21, a positioning groove 21 is left between each two adjacent stop balls 62, which not only makes the steering gear disc 3 have better stability during the rotation process, but also reduces the friction between the steering gear disc 3 and the positioning sleeve 2, eliminates the feeling of jamming and frustration during gear switching, enhances the silky smoothness during gear switching, brings convenience to the doctor's operation and helps to eliminate misoperation. In addition, the steering gear disc 3 is relatively stable and does not shake during the rotation and shifting process, which can facilitate the doctor to accurately and quickly rotate the anastomosis component to the required gear angle during clinical application.

[0052] In addition, compared with the prior art, in the steering mechanism provided by the embodiment of the present utility model, a plurality of elastic locking components 6 are arranged at equal intervals along the circumferential direction of the steering gear position disc 3. A plurality of positioning grooves 21 are arranged at equal intervals along the circumferential direction on the inner wall of the positioning sleeve 2, and the number of the positioning grooves 21 is twice the number of the elastic locking components 6. When each positioning ball 62 is embedded in the corresponding positioning groove 21, a positioning groove 21 is left empty between every two adjacent positioning balls 62. When the elastic locking components 6 on the steering gear position disc 3 are aligned with the corresponding positioning grooves 21, the positioning balls 62 of the elastic locking components 6 are embedded and locked in the corresponding positioning grooves 21 of the positioning sleeve 2 under the elastic force of the elastic member 63. At this time, under the mutual locking action of the plurality of elastic locking components 6 and the plurality of positioning grooves 21, the steering gear position disc 3 and the positioning sleeve 2 are uniformly stressed, which is beneficial to overcoming the defect that the locking force provided by the positioning ball 62 is small, resulting in easy gear skipping when the endoscopic stapler anastomoses thick tissues. Thereby, the working stability and reliability of the endoscopic stapler are enhanced, accidents during the operation are avoided, and the safety of the operation is improved.

[0053] Please refer to Figure 1 , Figure 5 and Figure 9 , in some embodiments, the positioning groove 21 is a tooth groove extending in the first direction. The length of the tooth groove is equal to the length of the positioning sleeve 2, the width of the tooth groove is greater than or equal to the diameter of the positioning ball 62, and the depth of the tooth groove is less than or equal to the radius of the positioning ball 62. During the rotation of the steering gear position disc 3, the friction between the steering gear position disc 3 and the positioning sleeve 2 can be reduced, the jamming and jerky feeling during gear shifting can be eliminated, and the smoothness during gear shifting can be enhanced. Moreover, when each positioning ball 62 is embedded in the corresponding positioning groove 21, it is beneficial to enhance the stability of the engagement between each positioning ball 62 and the corresponding positioning groove 21, and it is beneficial to overcome the defect that the locking force provided by the positioning ball 62 is small, resulting in easy gear skipping when the endoscopic stapler anastomoses thick tissues.

[0054] Please refer to Figure 1 , Figure 7 and Figure 11, in some of these embodiments, the first linkage assembly 4 includes a steering shaft 41 for driving the rotation of the steering gear disc 3, a steering knob 42 for driving the rotation of the steering shaft 41, and a rotating disc 43 for actuating the second linkage assembly 5. A sleeve hole 32 extending axially in the first direction is provided on the steering gear disc 3. The steering shaft 41 is inserted into the sleeve hole 32. One end of the steering shaft 41 away from the housing 1 is connected to the steering knob 42, and the other end of the steering shaft 41 is connected to the rotating disc 43. The doctor only needs to rotate the steering knob 42, and the steering shaft 41 rotates with the steering knob 42. The steering shaft 41 drives the steering gear disc 3 to rotate relative to the positioning sleeve 2. The rotating disc 43 that rotates with the steering shaft 41 simultaneously actuates the second linkage assembly 5 to perform reciprocating motion in the housing 1, and then controls the steering link to drive the kiss-cutting assembly to rotate through the second linkage assembly 5. Until the doctor adjusts the kiss-cutting assembly to a proper position and when the respective elastic locking members 6 on the steering gear disc 3 are aligned with the corresponding positioning grooves 21, stop rotating the steering knob 42. The stop spheres 62 of the respective elastic locking members 6 are pushed by the elastic force of the elastic members 63 and are inserted and locked in the corresponding positioning grooves 21 of the positioning sleeve 2. At this time, under the action of the mutual locking of the plurality of elastic locking members 6 and the plurality of positioning grooves 21, the steering gear disc 3 cannot rotate and remains in the first gear position. When the doctor needs to adjust the angular position of the kiss-cutting assembly again, only rotate the steering knob 42 to disengage the steering gear disc 3 from driving the respective elastic locking members 6 from the corresponding positioning grooves 21. When continuing to adjust the kiss-cutting assembly to another proper position, the plurality of elastic locking members 6 and the plurality of positioning grooves 21 are mutually locked again, and the steering gear disc 3 cannot rotate and remains in the second gear position. And so on, the steering gear disc 3 can be positioned in a plurality of different gear positions, so that the adjustment of different angular gear positions of the kiss-cutting assembly can be realized.

[0055] Please refer to Figure 1 , Figure 2 and Figure 7 , in some of these embodiments, a necking sleeve 33 is provided on the side of the steering gear disc 3 facing the steering knob 42. The necking sleeve 33 is communicated with the sleeve hole 32. When the steering shaft 41 is inserted into the sleeve hole 32, the necking sleeve 33 is sleeved on the steering shaft 41, which can enhance the stability of the connection between the steering shaft 41 and the steering gear disc 3, so that the steering shaft 41 can stably drive the steering gear disc 3 to rotate to realize gear shifting adjustment.

[0056] Please refer to Figure 7In some embodiments, a clamping portion 34 is provided on the inner wall of the necked sleeve 33 and / or the hole wall of the sleeve hole 32, and a clamping groove 44 for cooperating with the clamping portion 34 is provided on the outer wall of the steering shaft 41. When the steering shaft 41 is inserted into the sleeve hole 32, the clamping groove 44 on the steering shaft 41 is clamped with the clamping portion 34 on the necked sleeve 33 and / or the sleeve hole 32 without gap, so as to avoid relative rotation between the steering shaft 41 and the steering gear plate 3 to affect the accuracy of the gear adjustment, thereby facilitating the steering shaft 41 to drive the steering gear plate 3 to rotate to achieve the stability and reliability of the gear switching adjustment.

[0057] Please refer to Figure 1 , Figure 10 and Figure 11 In some embodiments, the steering mechanism further includes a sleeve cover 7 for positioning the steering gear disc 3 in the positioning sleeve 2, and the sleeve cover 7 is detachably connected to the housing 1. By positioning the steering gear disc 3 in the positioning sleeve 2 through the sleeve cover 7, the stability and reliability of the steering gear disc 3 rotating to achieve gear switching adjustment can be enhanced.

[0058] Please refer to Figure 1 , Figure 10 and Figure 11 In some embodiments, a limiting member 8 is provided on the steering knob 42, and an arc-shaped limiting groove 71 for limiting the movement of the limiting member 8 along a predetermined path is provided on the shaft sleeve cover 7. The end of the limiting member 8 away from the steering knob 42 is slidably inserted into the arc-shaped limiting groove 71. When the steering knob 42 drives the steering shaft 41 to rotate, the arc-shaped limiting groove 71 on the shaft sleeve cover 7 limits the movement of the limiting member 8 along the predetermined path, thereby limiting the rotation angle range of the steering knob 42, so as to prompt the doctor whether the rotation angle reaches the limit position, thereby avoiding misoperation and improving the safety of the operation. It should be noted that the arc-shaped limiting groove 71 limits the rotation angle range of the steering knob 42 to 90° to 180°.

[0059] Please refer to Figure 3 , Figure 8 and Figure 11, in some embodiments, the second linkage assembly 5 includes a swivel pin 51 provided at the bottom of the rotating disk 43, a swivel pull block 52 slidably disposed in the housing 1 along a second direction, and a hook 53 provided on the swivel pull block 52. The central axis of the swivel pin 51 is parallel and offset from the central axis of the steering shaft 41. The swivel pull block 52 is provided with a waist-shaped hole 54 extending in a third direction. The third direction is perpendicular to the first direction and perpendicular to the second direction. The swivel pin 51 is slidably inserted into the waist-shaped hole 54. Since the swivel pin 51 of the first linkage assembly 4 is fixedly provided at a position near the outer side of the bottom of the rotating disk 43, that is, the central axis of the swivel pin 51 is parallel and offset from the central axis of the steering shaft 41. When the steering knob 42 rotates, the steering shaft 41 rotates together with the steering knob 42. The rotation of the steering shaft 41 drives the rotation of the rotating disk 43, thereby driving the swivel pin 51 to rotate together. It should be noted that the steering shaft 41 and the rotating disk 43, and the swivel pin 51 and the rotating disk 43 can be fixedly connected by means of snap connection, integral molding, etc. Since the swivel pull block 52 is disposed in the accommodating space of the housing 1 and the swivel pull block 52 can slide relative to the housing 1 along the second direction, the swivel pull block 52 can be slidably connected to the housing 1 by means of a slider and a chute. When the steering knob 42 rotates to drive the rotation of the rotating disk 43, the swivel pin 51 rotates around the axis of the steering shaft 41 and slides in the waist-shaped hole 54, thereby driving the swivel pull block 52 to slide inside the housing 1 along the first direction. When the swivel pull block 52 slides inside the housing 1 along the first direction, the steering link can be controlled by the swivel pull block 52 to drive the kiss-cutting assembly to rotate.

[0060] It should be noted that, in some embodiments, the stop sphere 62 is a steel ball, a plastic ball or a ceramic ball, and the elastic member 63 is a spring.

[0061] Please refer to Figure 1 , Figure 7 and Figure 8 , in some embodiments, the steering mechanism further includes a steering lock 9 for locking the rotating disk 43. The steering lock 9 is slidably disposed in the housing 1 along the second direction. The steering lock 9 is provided with a locking tongue 91. The rotating disk 43 is provided with a locking groove 10 or a locking hole for the locking tongue 91 to be inserted into. When the steering lock 9 slides to the first position, the locking tongue 91 on the steering lock 9 is inserted into the locking groove 10 or the locking hole on the rotating disk 43, thereby locking the rotating disk 43 and preventing the rotating disk 43 from rotating. When the steering lock 9 slides from the first position to the second position, the locking tongue 91 on the steering lock 9 moves out of the locking groove 10 or the locking hole on the rotating disk 43, thereby releasing the locking of the rotating disk 43. In addition, a stepped hole 12 for positioning the rotating disk 43 is provided at a position corresponding to the hole position 11 on the housing 1. The rotating disk 43 is supported and rotatably installed in the stepped hole 12, which is beneficial to enhancing the stable reliability of the rotation of the rotating disk 43 and at the same time beneficial to improving the stable reliability of the steering shaft 41 driving the steering gear disk 3 to rotate.

[0062] The present utility model further provides a laparoscopic stapler, which includes the steering mechanism in any of the above embodiments. Since the laparoscopic stapler has the same technical features as the steering mechanism in any of the above embodiments, the laparoscopic stapler has the same technical effects as the steering mechanism in any of the above embodiments, and thus will not be elaborated herein.

[0063] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steering mechanism, characterized in that: include: The housing is provided with a hole extending axially along a first direction; A positioning sleeve, fixedly mounted on the housing and located in the hole, a plurality of positioning grooves are provided on the inner wall of the positioning sleeve, and the plurality of positioning grooves are arranged at equal intervals along the circumference of the positioning sleeve; A steering gear plate, rotatably disposed in the positioning sleeve; A first linkage assembly, used for driving the steering gear plate to rotate circumferentially relative to the positioning sleeve, the first linkage assembly being rotatably mounted on the housing; A second linkage assembly is slidably disposed in the housing along a second direction, wherein the second direction is perpendicular to the first direction; The second linkage component is connected to the first linkage component, so that when the first linkage component rotates, the second linkage component is actuated by the first linkage component to make the second linkage component slide along the second direction; as well as The elastic locking component comprises a sleeve embedded on the steering gear plate, a stop ball rollingly arranged in the sleeve, and an elastic member arranged in the sleeve to elastically push the stop ball toward the inner wall of the positioning sleeve; Among them, a plurality of the elastic locking components are provided on the steering gear plate, and the plurality of the elastic locking components are arranged at equal intervals along the circumference of the steering gear plate, and the number of the positioning grooves is twice the number of the elastic locking components, so that when the stop ball of each elastic locking component is embedded in the corresponding positioning groove, a positioning groove is left between each two adjacent stop balls.

2. The steering mechanism according to claim 1, characterized in that: The positioning groove is a tooth groove extending along the first direction, the length of the tooth groove is equal to the length of the positioning sleeve, the width of the tooth groove is greater than or equal to the diameter of the stop ball, and the depth of the tooth groove is less than or equal to the radius of the stop ball.

3. The steering mechanism according to claim 1, characterized in that: The first linkage assembly includes a steering shaft for driving the steering gear plate to rotate, a steering knob for driving the steering shaft to rotate, and a rotating disk for actuating the second linkage assembly. The steering gear plate is provided with a sleeve hole extending axially along the first direction. The steering shaft is inserted into the sleeve hole. One end of the steering shaft facing away from the housing is connected to the steering knob, and the other end of the steering shaft is connected to the rotating disk.

4. The steering mechanism according to claim 3, characterized in that: A necked sleeve is provided on a surface of the steering gear plate facing the steering knob, and the necked sleeve is communicated with the sleeve hole, so that when the steering shaft is inserted into the sleeve hole, the necked sleeve is sleeved on the steering shaft.

5. The steering mechanism according to claim 4, characterized in that: A clamping portion is provided on the inner wall of the necked sleeve and / or the hole wall of the sleeve hole, and a clamping groove for cooperating and clamping with the clamping portion is provided on the outer wall of the steering shaft.

6. The steering mechanism according to claim 3, characterized in that: The steering mechanism also includes a shaft sleeve cover for positioning the steering gear plate in the positioning sleeve, and the shaft sleeve cover is detachably connected to the housing.

7. The steering mechanism according to claim 6, characterized in that: The steering knob is provided with a limit piece, and the sleeve cover is provided with an arc-shaped limit groove for limiting the movement of the limit piece along a predetermined path to limit the rotation angle range of the steering knob, and the end of the limit piece away from the steering knob can be slidably inserted in the arc-shaped limit groove.

8. The steering mechanism according to claim 3, characterized in that: The second linkage assembly includes a swivel pin arranged at the bottom of the rotating disk, a swivel pull block slidably arranged in the shell along the second direction, and a pull hook arranged on the swivel pull block. The central axis of the swivel pin is parallel to and staggered with the central axis of the steering shaft. The swivel pull block is provided with a waist-shaped hole extending along a third direction, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction. The swivel pin can be slidably inserted in the waist-shaped hole.

9. The steering mechanism according to any one of claims 1 to 8, characterized in that: The stop ball is a steel ball, a plastic ball or a ceramic ball, and the elastic member is a spring.

10. A laparoscopic stapler, characterized in that: Comprising a steering mechanism as claimed in any one of claims 1 to 9.

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