Swing mechanism for a stapler and stapler thereof

Abstract

The present invention relates to the technical field of anastomosis devices, and in particular to a swinging mechanism for anastomosis devices and an anastomosis device thereof, the swinging mechanism comprising an actuator seat, an extension tube, a push rod and a swinging seat; the rear end of the swinging seat has a left groove and a right groove, the front end end of the left push rod has a left hook, and the front end end of the right push rod has a right hook; the present invention utilizes the left hook and the right hook to cooperate with the left groove and the right groove respectively, on the one hand, so that during the swinging of the actuator seat from the center position to the left extreme position or the right extreme position, only a single push rod applies force to the actuator seat, so as to prevent the extension tube from being bent and deformed due to excessive force on the actuator seat at the left extreme position and the right extreme position, thereby improving the operation accuracy during surgery; on the other hand, the two push rods always keep in contact with the swinging seat, so that the actuator seat will be constrained by the two push rods during the swinging process between the left extreme position and the right extreme position, thereby ensuring the stability of the actuator seat during the rotation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anastomat, in particular to a swing mechanism for anastomat and anastomat. BACKGROUND

[0002] The cutting anastomat is one of the important instruments in endoscopic surgery, mainly comprising a terminal effector, an extension tube and a handle assembly, the handle assembly is connected with the terminal effector through the extension tube, the handle assembly is used for being held by a surgeon to control the terminal effector to swing left and right and rotate, so as to adjust the position of the terminal effector, and after the position of the terminal effector is adjusted, the terminal effector is operated to perform surgical operation, such as cutting and suturing;

[0003] The existing swing structure for swinging the terminal effector of the anastomat generally comprises an execution seat and two push rods, the terminal effector is installed on the execution seat, the front end of the push rod is engaged with the execution seat for transmission or hinged, the rear end of the push rod is inserted into the extension tube and connected with the handle part, so that power input is realized, thereby the terminal effector is swung left and right through the forward and backward movement of the two push rods, the problem of the swing structure is that the two push rods will act on the execution seat when working, so that the two push rods will generate a great force on the execution seat when the terminal effector swings to the left limit position and the right limit position, so that the push rod will drive the extension tube to bend and deform (for example, the middle part of the extension tube is arched), thereby affecting the operation accuracy. SUMMARY

[0004] The present application solves the technical problem that the terminal effector of the anastomat in the prior art will generate a great force on the execution seat when swinging to the left limit position and the right limit position, so that the push rod will drive the extension tube to bend and deform, thereby affecting the operation accuracy, and provides a swing mechanism for anastomat and anastomat.

[0005] The technical solution adopted by the present application to solve the technical problem is that a swing mechanism for anastomat comprises:

[0006] an execution seat, the front end of which is used for installing a terminal effector;

[0007] an extension tube, the front end of which is hinged with the rear end of the execution seat to form a hinge point;

[0008] two push rods, the rear end of each of which is slidingly installed in the extension tube along the axial direction of the extension tube, the two push rods are arranged to move forward along the extension tube when one of the push rods moves forward, and the other push rod moves backward; the two push rods are respectively a left push rod and a right push rod;

[0009] and a swing base, the swing base is fixedly connected with the rear end of the execution base, the rear end of the swing base has a left groove and a right groove, the left groove and the right groove are respectively located on both sides of the hinge point; the front end of the left push rod has a left hook portion protruding outside the extension pipe, and the front end of the right push rod has a right hook portion protruding outside the extension pipe;

[0010] When the execution base is in the central position, the left hook portion is located in the left groove and in contact with the front side wall of the left groove, and the right hook portion is located in the right groove and in contact with the front side wall of the right groove; the two push rods are used to drive the execution base to swing back and forth between the left limit position and the right limit position through the movement of the front and rear directions thereof;

[0011] During the process that the execution base swings from the central position to the right limit position, the front end of the left hook portion pushes the front side wall of the left groove forward to force the execution base to swing to the right, and the right hook portion passes through the slot of the right groove to reach outside the right groove, and the front end of the right hook portion is in contact with the outer wall of the swing base;

[0012] During the process that the execution base swings from the central position to the left limit position, the front end of the right hook portion pushes the front side wall of the right groove forward to force the execution base to swing to the left, and the left hook portion passes through the slot of the left groove to reach outside the left groove, and the front end of the left hook portion is in contact with the outer wall of the swing base.

[0013] Further, during the process that the execution base swings from the right limit position to the central position, the rear end of the left hook portion first pulls the rear side wall of the left groove backward to force the execution base to swing to the left, and after the right hook portion passes through the slot of the right groove to enter the right groove, the front end of the right hook portion pushes the front side wall of the right groove to force the execution base to swing to the left;

[0014] During the process that the execution base swings from the left limit position to the central position, the rear end of the right hook portion first pulls the rear side wall of the right groove backward to force the execution base to swing to the right, and after the left hook portion passes through the slot of the right groove to enter the left groove, the front end of the left hook portion pushes the front side wall of the left groove to force the execution base to swing to the right.

[0015] Further, the rear side wall of the left groove protrudes a left protruding portion into the left groove;

[0016] The rear side wall of the right groove protrudes a right protruding portion into the right groove.

[0017] Further, the front end of the left push rod has a left inclined surface, and the gap between the rear end of the left hook portion and the left inclined surface forms a left recess portion opening toward the right push rod;

[0018] The front end of the right push rod has a right inclined surface, and the gap between the rear end of the right hook portion and the right inclined surface forms a right recess portion opening toward the left push rod.

[0019] Further, the left push rod is fixed with a left rack, the right push rod is fixed with a right rack, a gear is rotatably installed in the extension pipe, the gear is located between the left rack and the right rack, the left rack and the right rack are arranged in parallel with each other and are engaged with the gear.

[0020] Further, the depth direction of the left groove is the height direction of the front side wall of the left groove and the height direction of the rear side wall of the left groove, the height of the front side wall of the left groove > the height of the rear side wall of the left groove.

[0021] The depth direction of the right groove is the height direction of the front side wall of the right groove and the height direction of the rear side wall of the right groove, the height of the front side wall of the right groove > the height of the rear side wall of the right groove.

[0022] The application also provides an anastomat comprising the swing mechanism for an anastomat.

[0023] The application has the advantages that: the swing mechanism for an anastomat utilizes the cooperation of the left hook part and the right hook part with the left groove and the right groove respectively, on the one hand, only a single push rod exerts force on the execution seat during the swing of the execution seat from the central position to the left limit position or the right limit position, so as to prevent the bending deformation of the extension pipe caused by too much force on the execution seat at the left limit position and the right limit position, and improve the operation precision during the operation; on the other hand, the two push rods are always in contact with the swing seat, so that the execution seat is always constrained by the two push rods during the swing of the execution seat between the left limit position and the right limit position, thereby ensuring the stability of the execution seat during the rotation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Figure 1 is a three-dimensional schematic view of the two push rods in the application being linked and cooperating with the swing seat;

[0026] Figure 2 is a three-dimensional schematic view of the swing mechanism for an anastomat in the application when the execution seat is in the central position;

[0027] Figure 3 is a three-dimensional schematic view of the swing mechanism for an anastomat in the application when it is swinging;

[0028] Figure 4 is Figure 3 is a partial enlarged schematic view of A in FIG.

[0029] Figure 5 is a schematic view of the cooperation of the push rod with the swing seat when the execution seat is in the central position;

[0030] Figure 6 is Figure 5 is a partial enlarged schematic view of B in FIG.

[0031] Figure 7 This is a schematic diagram of the cooperation between the push rod and the swing seat when the actuator seat is in the right limit position;

[0032] Figure 8 yes Figure 7 A partial enlarged schematic diagram of center C;

[0033] Figure 9 It is a schematic diagram of the cooperation between the push rod and the swing seat when the actuator seat is in the left extreme position.

[0034] In the figure: 1. Execution seat;

[0035] 2. End effector;

[0036] 3. Extension tube;

[0037] 4. Hinge point;

[0038] 5. Left push rod, 51. Left hook, 52. Left inclined surface, 53. Left recessed portion, 54. Left rack;

[0039] 6. right push rod, 61. right hook portion, 62. right inclined surface, 63. right recessed portion, 64. right rack;

[0040] 7. Swing seat, 71. Left groove, 711. Left protrusion, 72. Right groove, 721. Right protrusion;

[0041] 9. Gear. DETAILED DESCRIPTION

[0042] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating the basic structure of the present invention only in a schematic manner. They therefore only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0043] like Figure 1-9 As shown, a swing mechanism for an anastomosis device includes an actuator 1, an extension tube 3, a push rod and a swing seat 7;

[0044] The front end of the execution seat 1 is used to install the end effector 2, which can be used to perform cutting and suturing operations. It can specifically include a staple cartridge assembly, and the staples in the staple cartridge assembly are used to staple tissues.

[0045] The front end of the extension tube 3 and the rear end of the actuator base 1 are hinged to form a hinge point 4, which is specifically the rotation center line between the extension tube 3 and the actuator base 1;

[0046] There are two push rods, the rear ends of which are slidably mounted in the extension tube 3 along the axial direction of the extension tube 3. The two push rods are arranged so that when one push rod moves forward along the extension tube 3, the other push rod moves backward. The two push rods are respectively a left push rod 5 and a right push rod 6.

[0047] The swing base 7 is fixedly connected to the rear end of the actuator base 1. The rear end of the swing base 7 has a left groove 71 and a right groove 72. The left groove 71 and the right groove 72 are respectively located on both sides of the hinge point 4. The front end of the left push rod 5 has a left hook portion 51 extending outside the extension tube 3. The front end of the right push rod 6 has a right hook portion 61 extending outside the extension tube 3.

[0048] like Figure 5-6 As shown, when the actuator base 1 is in the center position, the left hook portion 51 is located in the left groove 71 and contacts the front side wall of the left groove 71, and the right hook portion 61 is located in the right groove 72 and contacts the front side wall of the right groove 72; the two push rods are used to drive the actuator base 1 to swing back and forth between the left extreme position and the right extreme position through their forward and backward movement;

[0049] like Figure 7-8 As shown, during the process of the actuator base 1 swinging rightward from the center position to the right limit position, the front end of the left hook portion 51 pushes forward the front side wall of the left groove 71, forcing the actuator base 1 to swing rightward, and the right hook portion 61 passes through the notch of the right groove 72 to reach the outside of the right groove 72, and the front end of the right hook portion 61 contacts the outer wall of the swing base 7;

[0050] like Figure 9 As shown, in the process of the execution base 1 swinging from the center position to the left extreme position, the front end of the right hook 61 pushes the front side wall of the right groove 72 forward and forces the execution base 1 to swing to the left, and the left hook 51 passes through the notch of the left groove 71 to reach the outside of the left groove 71, and the front end of the left hook 51 contacts the outer wall of the swing seat 7.

[0051] The swing mechanism utilizes the design of the left hook 51 and the right hook 61 matching the left groove 71 and the right groove 72 respectively, which has the following advantages:

[0052] On the one hand, when the actuator base 1 swings from the center position to the left extreme position or the right extreme position, only a single push rod applies force to the actuator base 1, thereby preventing the extension tube 3 from being bent and deformed due to excessive force on the actuator base 1 at the left extreme position and the right extreme position, thereby improving the operating accuracy during surgery; at the same time, the left hook portion 51 and the right hook portion 61 are both cantilever beam structures, so that when in the right extreme position, the left hook portion 51 can slide relative to the left groove 71, and when in the left extreme position, the right hook portion 61 can slide relative to the right groove 72, thereby further reducing the force transmitted to the extension tube 3 by the push rod at the left extreme position and the right extreme position;

[0053] On the other hand, the two push rods are always in contact with the swing seat 7, so that the swing seat 1 is always constrained by the two push rods during the swinging between the left limit position and the right limit position, thereby ensuring the stability of the swing seat 1 during the swinging.

[0054] In some examples, during the swinging of the swing seat 1 from the right limit position to the central position, the rear end of the left hook portion 51 first pulls the rear side wall of the left groove 71 backward to force the swing seat 1 to swing leftward, and after the right hook portion 61 passes the notch of the right groove 72 to enter the right groove 72, the front end of the right hook portion 61 pushes the front side wall of the right groove 72 to force the swing seat 1 to swing leftward; in this way, the swing seat 1 is reset from the right limit position to the central position.

[0055] During the swinging of the swing seat 1 from the left limit position to the central position, the rear end of the right hook portion 61 first pulls the rear side wall of the right groove 72 backward to force the swing seat 1 to swing rightward, and after the left hook portion 51 passes the notch of the right groove 72 to enter the left groove 71, the front end of the left hook portion 51 pushes the front side wall of the left groove 71 to force the swing seat 1 to swing rightward; in this way, the swing seat 1 is reset from the left limit position to the central position.

[0056] In some examples, the rear side wall of the left groove 71 protrudes a left protruding portion 711 inwardly; during the swinging of the swing seat 1 from the right limit position to the central position, the left protruding portion 711 is arranged to facilitate the stable hooking of the rear end of the left hook portion 51, and the swing seat 1 is swung leftward by the rear end of the left hook portion 51 pulling the left protruding portion 711.

[0057] The rear side wall of the right groove 72 protrudes a right protruding portion 721 inwardly; during the swinging of the swing seat 1 from the left limit position to the central position, the right protruding portion 721 is arranged to facilitate the stable hooking of the rear end of the right hook portion 61, and the swing seat 1 is swung rightward by the rear end of the right hook portion 61 pulling the right protruding portion 721.

[0058] In some examples, the front end of the left push rod 5 has a left inclined surface 52 inclined leftward from rear to front, so that the cross-sectional area of the left push rod 5 at the left inclined surface 52 gradually decreases from rear to front, and the gap between the rear end of the left hook portion 51 and the left inclined surface 52 forms a left recessed portion 53 facing the right push rod 6, and the left protruding portion 711 and the right protruding portion 721 are located in the left recessed portion 53 when in the right limit position.

[0059] The front end of the right push rod 6 has a right inclined surface 62 inclined to the right from back to front, so that the cross-sectional area of the right push rod 6 at the right inclined surface 62 gradually decreases from back to front, and the gap between the right hook portion 61 rear end and the right inclined surface 62 forms an opening facing the right recessed portion 63 of the left push rod 5. In the left limit position, the left protruding portion 711 and the right protruding portion 721 are located in the right recessed portion 63.

[0060] In some examples, the left push rod 5 is fixed with a left rack 54, the right push rod 6 is fixed with a right rack 64, a gear 9 is rotatably installed in the extension tube 3, the gear 9 is located between the left rack 54 and the right rack 64, the left rack 54 and the right rack 64 are arranged parallel to each other and are both engaged with the gear 9; so as to realize the linkage of the left push rod 5 and the right push rod 6, that is, when the left rack 54 moves forward, the gear 9 drives the right rack 64 to move backward, and when the left rack 54 moves backward, the gear 9 drives the right rack 64 to move forward.

[0061] In some examples, the depth direction of the left groove 71 is the height direction of the front side wall and the height direction of the rear side wall of the left groove 71, and the height of the front side wall of the left groove 71 is greater than the height of the rear side wall of the left groove 71.

[0062] The depth direction of the right groove 72 is the height direction of the front side wall and the height direction of the rear side wall of the right groove 72, and the height of the front side wall of the right groove 72 is greater than the height of the rear side wall of the right groove 72.

[0063] In some examples, an anastomat comprises the above-mentioned swing mechanism for an anastomat, a handle assembly is connected with the execution seat 1 through the extension tube 3, and the handle assembly is used for the operator to hold to manipulate the end effector 2 to swing left and right and rotate, so as to adjust the position of the end effector 2, and after the position of the end effector 2 is adjusted, the end effector 2 is operated to perform a surgical operation, for example, a motor and a drive rack are arranged in the handle assembly, a drive gear is arranged on the main shaft of the motor, the drive gear is in transmission connection with the drive rack, the drive rack is slidably installed on the handle assembly along the axis direction of the extension tube 3, and the drive rack is fixedly connected with the left push rod 5, so that when the motor drives the drive rack to move forward and backward, the drive rack drives the left push rod 5 to move forward and backward, and the left push rod 5 is linked with the right push rod 6, so as to realize the left and right swinging of the execution seat 1 relative to the extension tube 3. It is worth noting that any one of the existing driving assemblies can be used as the power input of the left push rod 5 to drive the left push rod 5 to move forward and backward.

[0064] The working principle of the above-mentioned swing mechanism for an anastomat is as follows:

[0065] As Figure 2 , 5As shown in Figures 6 and 7 , when the actuator base 1 is in the center position, the left hook portion 51 is located in the left groove 71 and contacts the front side wall of the left groove 71 , and the right hook portion 61 is located in the right groove 72 and contacts the front side wall of the right groove 72 ;

[0066] like Figure 7 and 8 As shown, when the left push rod 5 moves forward and the right push rod 6 moves backward, the front end of the left hook 51 pushes the front side wall of the left groove 71 forward, forcing the actuator seat 1 to swing rightward, and swing rightward to the right limit position at most. At the right limit position, the right hook 61 is outside the right groove 72, but keeps in contact with the outer wall of the swing seat 7;

[0067] During the process of the actuator base 1 swinging from the right extreme position to the left to the center position, the left push rod 5 moves backward and the right push rod 6 moves forward. The rear end of the left hook portion 51 first pulls the rear side wall of the left groove 71 backward, forcing the actuator base 1 to swing to the left. After the right hook portion 61 passes through the notch of the right groove 72 and enters the right groove 72, the front end of the right hook portion 61 pushes the front side wall of the right groove 72, forcing the actuator base 1 to swing to the left. In this way, the actuator base 1 is reset from the right extreme position to the center position.

[0068] like Figure 9 As shown, when the left push rod 5 moves backward and the right push rod 6 moves forward, the front end of the right hook 61 pushes the front side wall of the right groove 72 forward, forcing the actuator seat 1 to swing leftward, and swing leftward to the left limit position at most. At the left limit position, the left hook 51 is outside the left groove 71, but keeps in contact with the outer wall of the swing seat 7;

[0069] In the process of the execution base 1 swinging from the left extreme position to the right to the center position, the left push rod 5 moves forward and the right push rod 6 moves backward. The rear end of the right hook 61 first pulls the rear side wall of the right groove 72 backward to force the execution base 1 to swing to the right. After the left hook 51 passes through the notch of the right groove 72 and enters the left groove 71, the front end of the left hook 51 pushes the front side wall of the left groove 71 to force the execution base 1 to swing to the right; thereby, the execution base 1 is reset from the left extreme position to the center position.

[0070] The above description of the preferred embodiments of the present invention is intended to serve as a guide. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A swing mechanism for a stapler, characterized in that: include: An actuator seat (1), the front end of which is used to mount an end actuator (2); Extension tube (3); Its front end is hinged to the rear end of the actuator seat (1) to form a hinge point (4); There are two push rods, the rear ends of which are slidably mounted in the extension tube (3) along the axial direction of the extension tube (3), and the two push rods are arranged so that when one push rod moves forward along the direction of the extension tube (3), the other push rod moves backward; the two push rods are respectively a left push rod (5) and a right push rod (6); and a swing seat (7) fixedly connected to the rear end of the execution seat (1), the rear end of the swing seat (7) having a left groove (71) and a right groove (72), the left groove (71) and the right groove (72) being respectively located on both sides of the hinge point (4); the front end of the left push rod (5) having a left hook portion (51) extending out of the extension tube (3), and the front end of the right push rod (6) having a right hook portion (61) extending out of the extension tube (3); When the actuator seat (1) is in the center position, the left hook portion (51) is located in the left groove (71) and contacts the front side wall of the left groove (71), and the right hook portion (61) is located in the right groove (72) and contacts the front side wall of the right groove (72); the two push rods are used to drive the actuator seat (1) to swing back and forth between the left limit position and the right limit position through their forward and backward movement; During the process of the execution seat (1) swinging rightward from the center position to the right limit position, the front end of the left hook portion (51) pushes the front side wall of the left groove (71) forward to force the execution seat (1) to swing rightward, and the right hook portion (61) passes through the notch of the right groove (72) to reach the outside of the right groove (72), and the front end of the right hook portion (61) contacts the outer wall of the swing seat (7); During the process of the execution seat (1) swinging leftward from the center position to the left limit position, the front end of the right hook portion (61) pushes the front side wall of the right groove (72) forward to force the execution seat (1) to swing leftward, and the left hook portion (51) passes through the notch of the left groove (71) to reach the outside of the left groove (71), and the front end of the left hook portion (51) contacts the outer wall of the swing seat (7); The front end of the left push rod (5) has a left inclined surface (52), and the gap between the rear end of the left hook (51) and the left inclined surface (52) forms a left recessed portion (53) opening toward the right push rod (6); The front end of the right push rod (6) has a right inclined surface (62), and the gap between the rear end of the right hook portion (61) and the right inclined surface (62) forms a right recessed portion (63) opening toward the left push rod (5); The depth direction of the left groove (71) is the height direction of the front side wall and the height direction of the rear side wall of the left groove (71), and the height of the front side wall of the left groove (71) is greater than the height of the rear side wall of the left groove (71); The depth direction of the right groove (72) is the height direction of the front side wall and the height direction of the rear side wall of the right groove (72), and the height of the front side wall of the right groove (72) is greater than the height of the rear side wall of the right groove (72).

2. The swing mechanism for a stapler according to claim 1, characterized in that: During the process of the execution seat (1) swinging from the right extreme position to the left to the center position, the rear end of the left hook portion (51) first pulls the rear side wall of the left groove (71) backward to force the execution seat (1) to swing to the left, and after the right hook portion (61) enters the right groove (72) through the notch of the right groove (72), the front end of the right hook portion (61) pushes the front side wall of the right groove (72) to force the execution seat (1) to swing to the left; During the process of the execution seat (1) swinging from the left extreme position to the right to the center position, the rear end of the right hook portion (61) first pulls the rear side wall of the right groove (72) backward to force the execution seat (1) to swing to the right, and after the left hook portion (51) enters the left groove (71) through the notch of the right groove (72), the front end of the left hook portion (51) pushes the front side wall of the left groove (71) to force the execution seat (1) to swing to the right.

3. The swing mechanism for a stapler according to claim 2, characterized in that: A left protrusion (711) protrudes from the rear side wall of the left groove (71) toward the inside of the left groove (71); A right protrusion (721) protrudes from the rear side wall of the right groove (72) toward the inside of the right groove (72).

4. The swing mechanism for a stapler according to claim 1, characterized in that: A left rack (54) is fixed on the left push rod (5), and a right rack (64) is fixed on the right push rod (6). A gear (9) is rotatably mounted in the extension tube (3). The gear (9) is located between the left rack (54) and the right rack (64). The left rack (54) and the right rack (64) are arranged parallel to each other and are both engaged with the gear (9).

5. A stapler, characterized in that: It comprises the swing mechanism for the stapler as described in any one of claims 1-4.

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