Linear cutting anastomat with built-in motion guiding function

Abstract

The invention discloses a linear type cutting anastomat with a built-in motion guiding function, relates to the technical field of anastomats, and aims to make structural improvement aiming at angle switching action in the cutting anastomat, and the linear type cutting anastomat is essentially characterized in that a gear transmission structure is additionally arranged on the basis of a basic transmission structure; a gear transmission structure is used for further limiting the angle switching action of a cutter bar, the basic transmission principle of a sun gear and a planet gear is used, a left co-movement gear and a right co-movement gear are additionally arranged on the basis, the transmission process of a driving gear cannot be directly affected by the structures of the left co-movement gear and the right co-movement gear, and the rotation angle of the driving gear is passively limited through a micro motor; furthermore, action gears associated with the left co-action gear and the right co-action gear are additionally arranged, the same-process angle limiting process can be achieved through the meshing process of the action gears and the driving gear or the outer ring gear disc, and then the effect of limiting the movement direction and the movement angle of the guide cutter bar can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and in particular to a linear cutting stapler with a built-in motion guiding function. Background Art

[0002] The principle of the cutting stapler is mainly to block the blood circulation of excess tissue through the mutual squeezing of the inner ring and the outer ring, thereby achieving the purpose of cutting the tissue and connecting the outer ends of the inner and outer rings. Its principle is similar to that of a stapler, but a corresponding transmission structure needs to be set up to maintain the movement of the staple magazine structure.

[0003] It should be noted that the transmission structure mainly converts the rotational action of the cam into a linear movement action to achieve the closing and angle switching of the stapler, and the operating part of the cutting stapler is located in the human body, so the operation process is particularly reflected in the doctor's operating experience and level, especially the angle switching process and closing process of the stapler position, which require precise control of the action position. Although an endoscope or other visualization tools are used for internal vision during the specific operation, the specific action process is still operated by the physician, resulting in excessive or insufficient stroke in the angle switching process of the stapler position, resulting in secondary surgical trauma, etc. This application proposes a solution. Summary of the invention

[0004] The purpose of the present invention is to provide a linear cutting stapler with a built-in motion guiding function. For the current cutting stapler, especially the angle switching process of the stapler position, it is necessary to accurately control the action position. The operation process is particularly reflected in the doctor's operating experience and level, which leads to the problem of excessive or insufficient stroke in the angle switching process of the stapler position, resulting in secondary surgical trauma, etc.

[0005] The object of the present invention can be achieved by the following technical solution: A linear cutting stapler with a built-in motion guiding function comprises a knife handle, a directional head and a knife rod, wherein a drive assembly corresponding to the knife rod is arranged inside the knife handle, and a gear plate group corresponding to the knife rod is arranged inside the directional head;

[0006] The gear plate group includes an outer ring gear plate, a driving gear, a planetary gear, a right co-acting gear and a left co-acting gear, wherein the driving gear is fixedly mounted on the knife bar position corresponding to the outer ring gear plate, the outer ring gear plate is rotatably mounted on the inner wall position of the orientation head, the planetary gear is located in the middle position between the outer ring gear plate and the driving gear, and the planetary gear is in meshing relationship with the outer ring gear plate and the driving gear;

[0007] The right cooperating gear is in meshing relationship with the outer ring gear plate, the left cooperating gear is in meshing relationship with the driving gear, and the left cooperating gear is not in meshing relationship with the outer ring gear plate. Micro motors corresponding to the right cooperating gear and the left cooperating gear are installed in the directional head. The right cooperating gear and the left cooperating gear are rotatably connected in the directional head through the micro motor, and an empty tooth portion is provided in the right cooperating gear.

[0008] It is further configured as follows: a fixed shaft is installed on the outer wall position of one side of the planetary gear corresponding to the directional head, a cooperative sliding groove corresponding to the fixed shaft is opened on the inner wall position of the directional head, and the planetary gear is rotationally connected to the directional head through the fixed shaft.

[0009] It is further configured as follows: a planet carrier is provided on the outer wall of the orientation head away from the fixed axis, the planet gear is rotationally connected to the two end positions of the planet carrier, and the planet carrier is rotationally connected to the tool rod.

[0010] It is further configured that: the center point of the cooperative sliding groove and the center point of the driving gear are on the same axis.

[0011] It is further configured as follows: an action gear is installed at the center point of the outer wall of the right cooperative gear and the left cooperative gear away from the planetary frame, and a positioning gear is installed at the center point of the action gear.

[0012] It is further configured as follows: an action gear is rotatably installed on the inner wall position of the orientation head away from the planetary frame, a positioning gear is installed on the inner wall center point position of the action gear away from the planetary frame, and the action gear is not colinear with the center point of the right cooperating gear or the left cooperating gear.

[0013] It is further configured as follows: a positioning plate is rotatably installed at the center point of the outer wall of the planetary gear away from the planetary frame, an external gear bar is installed at the position where the positioning plate points to the right co-acting gear or the left co-acting gear, the external gear bar is meshed with the positioning gear, and the center point of the external gear bar and the center point of the driving gear are on the same axis.

[0014] It is further configured that: a first half gear and a second half gear are provided on the action gear, the first half gear and the second half gear are meshed with the driving gear and the outer ring gear plate, and the diameter of the first half gear portion is greater than the diameter of the second half gear.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention aims at the angle switching action of the knife bar in the cutting stapler, and uses its internal drive assembly as the basic structure, and adds a gear transmission structure for the local position of the knife bar. The gear transmission structure will not directly affect the angle switching action of the knife bar, but uses the transmission principle between the sun gear / planetary gear to add a left cooperative gear and a right cooperative gear. The two structures are "passive structures" relative to the driving gear, so they will not directly affect the transmission process of the driving gear. Specifically, the two structures are driven by a micro motor to rotate at a fixed angle, thereby playing a role in limiting the rotation angle of the knife bar;

[0017] 2. Based on the above content, positioning plates and action gears are added to one side of the cooperative gear, left cooperative gear and right cooperative gear. The action gear is a key structure. When the planetary gear rotates at a fixed angle, the positioning gear synchronously drives the action gear to rotate at an angle, and then utilizes the meshing process of the action gear with the driving gear and the outer ring gear plate to realize the angle limitation process in the same process, and then it can play a role in limiting the movement direction and angle of the guide tool rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 work.

[0019] Figure 1 This is a schematic structural diagram of a linear cutting stapler with a built-in motion guiding function proposed by the present invention;

[0020] Figure 2 A cross-sectional view of a knife handle in a linear cutting stapler with a built-in motion guiding function proposed by the present invention;

[0021] Figure 3 A cross-sectional view of a directional head in a linear cutting stapler with a built-in motion guiding function proposed by the present invention;

[0022] Figure 4 This is a schematic structural diagram of a gear plate assembly in a linear cutting stapler with a built-in motion guiding function proposed by the present invention;

[0023] Figure 5 A front view of a gear plate assembly in a linear cutting stapler with a built-in motion guiding function proposed by the present invention;

[0024] Figure 6 A linear cutting stapler with built-in motion guiding function proposed by the present invention Figure 5 Side view of

[0025] Figure 7 A linear cutting stapler with built-in motion guiding function proposed by the present invention Figure 6 The front view of the corresponding mounting sleeve.

[0026] In the figure: 1. tool handle; 2. directional head; 3. tool rod; 4. drive assembly; 5. outer ring gear plate; 6. planetary gear; 7. right cooperative gear; 8. planetary carrier; 9. micro motor; 10. left cooperative gear; 11. driving gear; 12. external gear bar; 13. positioning plate; 14. mounting sleeve; 15. coil spring; 16. positioning gear; 17. action gear; 1701. first half gear; 1702. second half gear; 18. cooperative slide. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: For conventional cutting staplers, the angle switching process of the staple cartridge position is particularly targeted, and the action position needs to be precisely controlled. The operation process is particularly reflected in the doctor's operation experience and level, resulting in excessive or insufficient stroke in the angle switching process of the staple cartridge position, resulting in secondary surgical trauma, etc. The following technical solutions are proposed:

[0029] Reference Figures 1 to 7 In this embodiment, a linear cutting stapler with a built-in motion guiding function comprises a handle 1, an orientation head 2 and a knife bar 3. A drive assembly 4 corresponding to the knife bar 3 is arranged inside the handle 1, and a gear plate group corresponding to the knife bar 3 is arranged inside the orientation head 2;

[0030] The gear plate group includes an outer ring gear plate 5, a driving gear 11, a planetary gear 6, a right co-acting gear 7 and a left co-acting gear 10. The driving gear 11 is fixedly mounted on the position of the cutter bar 3 corresponding to the outer ring gear plate 5. The outer ring gear plate 5 is rotatably mounted on the inner wall of the directional head 2. The planetary gear 6 is located in the middle position between the outer ring gear plate 5 and the driving gear 11, and the planetary gear 6 is in meshing relationship with the outer ring gear plate 5 and the driving gear 11.

[0031] There is a meshing relationship between the right cooperating gear 7 and the outer ring gear plate 5, a meshing relationship between the left cooperating gear 10 and the driving gear 11, and there is no meshing between the left cooperating gear 10 and the outer ring gear plate 5. A micro motor 9 corresponding to the right cooperating gear 7 and the left cooperating gear 10 is installed in the directional head 2, and the right cooperating gear 7 and the left cooperating gear 10 are rotationally connected in the directional head 2 through the micro motor 9.

[0032] Working principle: The overall structure is similar to that of a conventional cutting stapler, with the driving assembly 4 realizing the key structure of motion control, but the difference lies in the gear plate group for the directional head 2, Figure 5 For example, the drive assembly 2 drives the cutter bar 3 to rotate, and then realizes the angle switching action, so the gear plate assembly in the present invention is mainly used to limit the angle switching action of the cutter bar 3;

[0033] It should be noted that: Figure 4 and Figure 5 Due to the active rotation process of the knife bar 3, the active gear 11 rotates at a fixed angle. During this process, the planetary gear 6 and the outer ring gear plate 5 are synchronously driven to rotate, and the left cooperative gear 10 is also driven to rotate. During this process, the right cooperative gear 7 is driven to rotate due to the core relationship of the outer ring gear plate 5. However, it should be noted that: the right cooperative gear 7 is provided with an empty tooth portion, that is, a part of the right cooperative gear 7 is without teeth, and no transmission process occurs between the outer ring gear plate 5, and the left cooperative gear 10 and the right cooperative gear 7 are both provided with a micro motor 9 for controlling the rotation process of the two. Then it is further understood that: if the two micro motors 9 maintain the same angle rotation process as the knife bar 3, they will not interfere with the angle switching action of the knife bar 3. On the contrary, if there is a difference in the movement of one of the micro motors 9 on the left cooperative gear 10 or the right cooperative gear 7, it can be understood that: the rotation angle of the knife bar 3 is limited by the left cooperative gear 10 or the right cooperative gear 7.

[0034] Embodiment 2: This embodiment describes the movement process of the planetary gear relative to the overall structure in Embodiment 1:

[0035] A fixed axis is installed on the outer wall of the planetary gear 6 corresponding to the directional head 2, and a cooperative slide groove 18 corresponding to the fixed axis is opened on the inner wall of the directional head 2. The planetary gear 6 is rotatably connected to the directional head 2 through the fixed axis. A planet carrier 8 is arranged on the outer wall of the directional head 2 away from the fixed axis. The planetary gear 6 is rotatably connected to the two ends of the planetary carrier 8, and the planetary carrier 8 is rotatably connected to the tool rod 3. The center point of the cooperative slide groove 18 and the center point of the driving gear 11 are on the same axis.

[0036] Solution description: Combined with the transmission relationship between the sun gear and the planetary gear, when the driving gear 11 is in a normal rotating state, the outer ring gear plate 5 is in a fixed state, and the two planetary gears 6 rotate at a fixed point; or the driving gear 11 is in a fixed state, the outer ring gear plate 5 is in a rotating state, and the planetary gears 6 rotate around the driving gear 11;

[0037] In this embodiment, the key is to control the rotation angle of the driving gear 11. When the cutting stapler is used for operation, the maximum switching angle of the knife bar 3 needs to be set in advance. In this process, it mainly depends on the rotation process of the left cooperative gear 10 and the right cooperative gear 7 relative to the driving gear 11. Then, it is necessary to further limit the gear ratio between the left cooperative gear 10, the right cooperative gear 7 and the driving gear 11. The essence of this is as follows:

[0038] When the rotation angle of the knife bar 3 has reached the maximum switching angle, the left cooperative gear 10 and the right cooperative gear 7 "arrive in advance" position, which is essentially: the left cooperative gear 10 limits the rotation of the driving gear 11, that is, the micro motor 9 corresponding to the left cooperative gear 10 is in a stopped state, and on the contrary, the micro motor 9 corresponding to the right cooperative gear 7 is used as a working mechanism to drive the outer ring gear plate 5 to rotate through the right cooperative gear 7. In this state, the planetary gear 6 rotates around the driving gear 11 during the rotation process, but the driving gear 11 remains fixed;

[0039] Thus refer to Figure 3 The two planetary gears 6 can rotate in the orientation head 2 through the fixed axis and can also rotate around the driving gear 11 through the cooperative slide groove 18. The purpose is to maintain the stability of the tool rod 3 and avoid deviation of the tool rod 3 during the angle switching process.

[0040] Embodiment 3: Based on Embodiment 1 and Embodiment 2, the motion process of the action gear associated with the planetary gear is described:

[0041] An action gear 17 is rotatably mounted on the inner wall of the orientation head 2 away from the planet carrier 8, a positioning gear 16 is mounted on the inner wall of the action gear 17 away from the center of the planet carrier 8, and the action gear 17 is not collinear with the center of the right co-acting gear 7 or the left co-acting gear 10, a positioning plate 13 is rotatably mounted on the outer wall center of the planetary gear 6 away from the planet carrier 8, an external gear bar 12 is mounted at the position of the positioning plate 13 pointing to the right co-acting gear 7 or the left co-acting gear 10, the external gear bar 12 is meshed with the positioning gear 16, and the center of the external gear bar 12 is in the same direction as the center of the driving gear 11. On the axis, a mounting sleeve 14 is installed on the inner wall position of the directional head 2 corresponding to the positioning gear 16, and a coil spring 15 is arranged inside the mounting sleeve 14. One end of the coil spring 15 is installed on the inner wall position of the mounting sleeve 14. A rotating shaft is arranged at the center point of the positioning gear 16. The rotating shaft passes through the mounting sleeve 14 and is connected to the other end of the coil spring 15. A first half gear 1701 and a second half gear 1702 are arranged on the action gear 17. The first half gear 1701 and the second half gear 1702 are respectively meshed with the driving gear 11 and the outer ring gear plate 5, and the diameter of the first half gear portion 1701 is larger than the diameter of the second half gear 1702.

[0042] Solution Description: Combined with Figure 6 and Figure 7 For explanation, when the planetary gear 6 is rotating but not rotating around the driving gear 11, the position of the outer gear bar 12 therein does not change. Figure 7 , because the position of the external gear bar 12 is not displaced relative to the positioning gear 16, the action gear 17 is in a relatively static state;

[0043] On the contrary, when the driving gear 11 is "fixed", the two planetary gears 6 will rotate around the driving gear 11 while rotating, and then it can be understood that the external gear bar 12 rotates with the center point of the driving gear 11 as the fulcrum, and the rotation directions of the two external gear bars 12 are in the same direction, and then the positioning gear 16 is synchronously driven to rotate at a fixed angle. Because the center point of the action gear 17 and the positioning gear 16 are co-pointed, the rotation angle of the action gear 17 is consistent with the positioning gear 16, so that Figure 7For example, when the two planetary gears 6 rotate counterclockwise around the driving gear 11, the positioning gear 16 and the action gear 17 rotate counterclockwise synchronously, and then the second half gear 1702 at the left co-acting gear 7 slowly approaches the outer ring gear plate 5, and the first half gear 1701 slowly approaches the driving gear 11, and the second half gear portion 1702 at the right co-acting gear 10 slowly approaches the driving gear 11, and the first half gear portion 1701 approaches the outer ring gear plate 5. It can be understood that: the two action gears 17 are in an independent operation state relative to the left co-acting gear 7 and the right co-acting gear 10, and their operation process mainly drives the winding process of the coil spring 15, and as Figure 7 As shown, the diameters of the first half gear 1701 and the second half gear 1702 are different;

[0044] The key function of the two action gears 17 is to further limit the rotation process of the outer ring gear 5 when the driving gear 11 is "fixed". Although the two action gears 17 are driven by the planetary gear 6, due to structural characteristics, such as Figure 7 As shown, when the second half tooth portion 1702 on the action gear 17 at the corresponding right cooperative gear 10 contacts the outer ring gear plate 5, the outer ring gear plate 5 will also be in a "locked" state, which is used to perform "secondary limiting" on the knife rod 3. However, the purpose of setting the planetary gear 6 and the external gear bar 12 is that when the knife rod 3 "needs to be fixed", there is still a small movement in the overall gear plate group to avoid affecting the doctor's operating stability when it is directly "locked".

[0045] To sum up: structural improvements are made for the angle switching action in the cutting stapler. Its essence is to add a gear transmission structure on the basis of the basic transmission structure, and use the gear transmission structure to further limit the angle switching action of the knife rod. The basic transmission principles of the sun gear and the planetary gear are utilized, and the left and right cooperating gears are added on this basis. The two structures will not directly affect the transmission process of the driving gear, but "passively" limit the rotation angle of the driving gear through the micro motor, and further add action gears associated with the left and right cooperating gears. The meshing process of the action gear and the driving gear or the outer ring gear plate can realize the angle limitation process of the same process, and then it can play a role in limiting the movement direction and angle of the guide knife rod.

[0046] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A linear cutting stapler with a built-in motion guiding function, comprising a handle (1), a directional head (2) and a knife rod (3), characterized in that: The handle (1) is provided with a drive assembly (4) corresponding to the tool rod (3), and the directional head (2) is provided with a gear plate group corresponding to the tool rod (3); The gear plate assembly comprises an outer ring gear plate (5), a driving gear (11), a planetary gear (6), a right cooperating gear (7) and a left cooperating gear (10); the driving gear (11) is fixedly mounted on a position of a knife bar (3) corresponding to the outer ring gear plate (5); the outer ring gear plate (5) is rotatably mounted on an inner wall of the directional head (2); the planetary gear (6) is located at a middle position between the outer ring gear plate (5) and the driving gear (11); and the planetary gear (6) is in a meshing relationship with the outer ring gear plate (5) and the driving gear (11); The right cooperating gear (7) and the outer ring gear plate (5) are in meshing relationship, the left cooperating gear (10) and the driving gear (11) are in meshing relationship, and the left cooperating gear (10) and the outer ring gear plate (5) are not in meshing relationship. A micro motor (9) corresponding to the right cooperating gear (7) and the left cooperating gear (10) is installed in the directional head (2). The right cooperating gear (7) and the left cooperating gear (10) are rotatably connected in the directional head (2) via the micro motor (9), and an empty tooth portion is provided in the right cooperating gear (7).

2. A linear cutting stapler with built-in motion guiding function according to claim 1, characterized in that: A fixed shaft is installed on the outer wall of one side of the planetary gear (6) corresponding to the orientation head (2), and a cooperating sliding groove (18) corresponding to the fixed shaft is provided on the inner wall of the orientation head (2), and the planetary gear (6) is rotationally connected to the orientation head (2) via the fixed shaft.

3. A linear cutting stapler with built-in motion guiding function according to claim 2, characterized in that: A planet carrier (8) is provided on the outer wall of the orientation head (2) on the side away from the fixed axis. The planet gear (6) and the two ends of the planet carrier (8) are rotationally connected. The planet carrier (8) and the cutter rod (3) are rotationally connected.

4. The linear cutting stapler with built-in motion guiding function according to claim 2, characterized in that: The center point of the cooperative sliding groove (18) and the center point of the driving gear (11) are located on the same axis.

5. The linear cutting stapler with built-in motion guiding function according to claim 3, characterized in that: The orientation head (2) is rotatably mounted with an operating gear (17) at a position on the inner wall away from the planet carrier (8), and the operating gear (17) is mounted with a positioning gear (16) at a position on the inner wall circle center away from the planet carrier (8), and the center point of the operating gear (17) is not colinear with the center point of the right cooperating gear (7) or the left cooperating gear (10).

6. A linear cutting stapler with built-in motion guiding function according to claim 5, characterized in that: A positioning plate (13) is rotatably mounted on the center point of the outer wall of the planetary gear (6) away from the planetary carrier (8); an external gear bar (12) is mounted at a position where the positioning plate (13) points to the right co-acting gear (7) or the left co-acting gear (10); the external gear bar (12) is meshed with the positioning gear (16), and the center point of the external gear bar (12) and the center point of the driving gear (11) are on the same axis.

7. The linear cutting stapler with built-in motion guiding function according to claim 5, characterized in that: The directional head (2) is provided with a mounting sleeve (14) on the inner wall position corresponding to the positioning gear (16); a coiled spring sheet (15) is arranged inside the mounting sleeve (14); one end of the coiled spring sheet (15) is mounted on the inner wall position of the mounting sleeve (14); a rotating shaft is arranged at the center point of the positioning gear (16); the rotating shaft passes through the mounting sleeve (14) and is connected to the other end of the coiled spring sheet (15).

8. The linear cutting stapler with built-in motion guiding function according to claim 5, characterized in that: The action gear (17) is provided with a first half gear (1701) and a second half gear (1702); the first half gear (1701) and the second half gear (1702) are meshed with the driving gear (11) and the outer ring gear plate (5); and the diameter of the first half gear portion (1701) is greater than the diameter of the second half gear (1702).

Images