A linear cutting stapler with built-in motion guiding function

Abstract

The present invention discloses a linear cutting stapler with an in-built motion guiding function, which relates to the technical field of staplers. It makes structural improvements to the angle switching action in the cutting stapler. Essentially, a gear transmission structure is added on the basis of the basic transmission structure. The gear transmission structure is used to further restrict the angle switching action of the cutter bar. The basic transmission principle of the sun gear and the planet gear is utilized, and on this basis, a left co-acting gear and a right co-acting gear are added. The structures of the two will not directly affect the transmission process of the driving gear, but "passively" restrict the rotation angle of the driving gear through a micro motor. An action gear associated with the left co-acting gear and the right co-acting gear is further added. By using the meshing process between the action gear and the driving gear or the outer ring gear disc, the angle restriction process in the same process can be realized, and then the movement direction and movement angle of the guiding cutter bar can be restricted.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and particularly relates to a linear cutting stapler with an internal motion guiding function. Background Art

[0002] The principle of a cutting stapler is mainly to block the blood circulation of redundant tissues through the mutual extrusion of an inner ring and an outer ring, so as to achieve the purpose of cutting tissues, and connect the tissues at 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 to maintain the movement process of the cartridge structure.

[0003] It should be noted here that: the transmission structure mainly converts the rotational movement of a cam into a linear movement to realize the closing and angle switching of the cartridge. Since the operating part of the cutting stapler is located inside the human body, the operation process especially depends on the doctor's operation experience and level. Particularly in the angle switching process and closing process of the cartridge position, the action position needs to be accurately controlled. Although an endoscope or other visualization tools are used for internal viewing during the specific operation process, the specific action process is still operated by the doctor, resulting in problems such as excessive or insufficient stroke in the angle switching process of the cartridge position, and situations such as secondary surgical trauma. Therefore, the present application proposes a solution. Summary of the Invention

[0004] The purpose of the present invention is to provide a linear cutting stapler with an internal motion guiding function. For the current cutting stapler, especially in the angle switching process of the cartridge position, the action position needs to be accurately controlled. The operation process especially depends on the doctor's operation experience and level, resulting in problems such as excessive or insufficient stroke in the angle switching process of the cartridge position, and situations such as secondary surgical trauma.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A linear cutting stapler with an internal motion guiding function, including a handle, an orientation head, and a cutter bar. A drive assembly corresponding to the cutter bar is arranged inside the handle, and a gear disc group corresponding to the cutter bar is arranged inside the orientation head;

[0006] The gear disc group includes an outer ring gear disc, a driving gear, a planetary gear, a right co-acting gear, and a left co-acting gear. The driving gear is fixedly installed at the position of the cutter bar corresponding to the outer ring gear disc. The outer ring gear disc is rotatably installed on the inner wall of the orientation head. The planetary gear is located between the outer ring gear disc and the driving gear, and the planetary gear is in a meshing relationship with both the outer ring gear disc and the driving gear;

[0007] The right co-acting gear and the outer ring gear disc are in a meshing relationship. The left co-acting gear and the driving gear are in a meshing relationship, and the left co-acting gear and the outer ring gear disc are not meshed. A micro motor corresponding to the right co-acting gear and the left co-acting gear is installed in the orientation head. The right co-acting gear and the left co-acting gear are rotationally connected in the orientation head by the micro motor, and a void tooth part is provided in the right co-acting gear.

[0008] It is further set that: a fixed shaft is installed at a position on the outer wall of one side of the planetary gear corresponding to the orientation head, and a co-acting sliding groove corresponding to the fixed shaft is opened at a position on the inner wall of the orientation head. The planetary gear is rotationally connected to the orientation head through the fixed shaft.

[0009] It is further set that: a planetary carrier is provided at a position on the outer wall of one side of the orientation head away from the fixed shaft. The planetary gear is rotationally connected between the two ends of the planetary carrier, and the planetary carrier is rotationally connected to the tool bar.

[0010] It is further set that: the center point of the co-acting sliding groove and the center point of the driving gear are on the same axis.

[0011] It is further set that: action gears are installed at the center point positions on the outer wall of one side of the right co-acting gear and the left co-acting gear away from the planetary carrier, and a positioning gear is installed at the center point position of the action gear.

[0012] It is further set that: an action gear is rotationally installed at a position on the inner wall of the orientation head away from the planetary carrier, a positioning gear is installed at the center point position on the inner wall of the action gear away from the planetary carrier, and the center points of the action gear and the right co-acting gear or the left co-acting gear are not collinear.

[0013] It is further set that: a positioning disc is rotationally installed at the center point position on the outer wall of one side of the planetary gear away from the planetary carrier. An externally installed gear bar is installed at a position on the positioning disc pointing to the right co-acting gear or the left co-acting gear. The externally installed gear bar is meshed with the positioning gear, and the center point of the externally installed gear bar and the center point of the driving gear are on the same axis.

[0014] It is further set 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 disc, and the diameter of the first half tooth part is larger than the diameter of the second half gear.

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

[0016] 1. The present invention focuses on the angle switching action of the knife rod in the cutting stapler. Based on its internal drive assembly as the basic structure, a gear transmission structure is added to a local position of the knife rod. The gear transmission structure does not directly affect the angle switching action of the knife rod. Instead, using the transmission principle between the sun gear and the planet gear, a left assisting gear and a right assisting gear are added. The structures of the two are "passive structures" relative to the driving gear, so they do not directly affect the transmission process of the driving gear. Specifically, a micro-motor is used to drive the two structures to rotate at a fixed angle, thereby restricting the rotation angle of the knife rod;

[0017] 2. Based on the above content, a positioning disk and an action gear are added to one side of the assisting gear, the left assisting gear, and the right assisting gear. The action gear is a key structure. When the planet gear rotates at a fixed angle, the action gear is synchronously driven to rotate at an angle through the positioning gear. Then, by utilizing the meshing process between the action gear, the driving gear, and the outer ring gear disk, an angle limiting process in the same process can be achieved, and thus the movement direction and movement angle of the guiding knife rod can be restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

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

[0020] Figure 2 is a sectional view of the handle of a linear cutting stapler with an internal motion guiding function proposed by the present invention;

[0021] Figure 3 is a sectional view of the orientation head of a linear cutting stapler with an internal motion guiding function proposed by the present invention;

[0022] Figure 4 is a schematic structural diagram of the gear disk group of a linear cutting stapler with an internal motion guiding function proposed by the present invention;

[0023] Figure 5 is a front view of the gear disk group of a linear cutting stapler with an internal motion guiding function proposed by the present invention;

[0024] Figure 6 is a linear cutting stapler with an internal motion guiding function proposed by the present inventionFigure 5 Side view;

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

[0026] In the figure: 1, handle; 2, orientation head; 3, cutter bar; 4, drive assembly; 5, outer ring gear disk; 6, planetary gear; 7, right co-acting gear; 8, planetary carrier; 9, micro motor; 10, left co-acting gear; 11, driving gear; 12, external gear rack; 13, positioning disk; 14, mounting sleeve; 15, coil spring piece; 16, positioning gear; 17, actuating gear; 1701, first half gear; 1702, second half gear; 18, co-acting chute. Specific embodiments

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1: For a conventional cutting stapler, especially for the angle switching process of the cartridge position, precise control of the action position is required. Its operation process is particularly reflected in the doctor's operation experience and level, resulting in problems such as excessive or insufficient stroke in the angle switching process of the cartridge position, and situations such as secondary trauma during surgery. Therefore, the following technical solutions are proposed:

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

[0030] The gear disk group includes an outer ring gear disk 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 installed at the position of the cutter bar 3 corresponding to the outer ring gear disk 5. The outer ring gear disk 5 is rotatably installed in the inner wall position of the orientation head 2. The planetary gear 6 is located between the outer ring gear disk 5 and the driving gear 11, and the planetary gear 6 is in a meshing relationship with both the outer ring gear disk 5 and the driving gear 11;

[0031] There is a meshing relationship between the right co-acting gear 7 and the outer ring gear disc 5, and a meshing relationship between the left co-acting gear 10 and the driving gear 11. Moreover, there is no meshing between the left co-acting gear 10 and the outer ring gear disc 5. A micro motor 9 corresponding to the right co-acting gear 7 and the left co-acting gear 10 is installed in the orientation head 2. The right co-acting gear 7 and the left co-acting gear 10 are rotatably connected in the orientation head 2 through the micro motor 9.

[0032] Working principle: The overall structure is basically similar to that of a conventional cutting stapler, and the driving assembly 4 is used to realize the key structure for action control. However, the difference lies in the gear disc group of the orientation head 2. Taking Figure 5 as an example, the driving assembly 2 drives the cutter bar 3 to rotate, and then realizes the angle switching action. Therefore, the gear disc group in the present invention is mainly used to limit the angle switching action of the cutter bar 3;

[0033] It should be noted here that: Referring to Figure 4 and Figure 5 , during the active rotation process of the cutter bar 3, the driving gear 11 rotates at a fixed angle. During this process, the planetary gear 6 and the outer ring gear disc 5 are synchronously driven to rotate, and the left co-acting gear 10 is also driven to rotate. During this process, the right co-acting gear 7 is driven to rotate due to the core relationship of the outer ring gear disc 5. However, it should be noted that: There is an empty tooth part in the right co-acting gear 7, that is, there is a part without teeth on the right co-acting gear 7, and thus there will be no any transmission process with the outer ring gear disc 5. And micro motors 9 are provided for both the left co-acting gear 10 and the right co-acting gear 7 to control their rotation processes. Further understood, if the two micro motors 9 maintain the same angle rotation process as the cutter bar 3, it will not interfere with the angle switching action of the cutter bar 3. On the contrary, if there are differences in the movements of one of the micro motors 9 for the left co-acting gear 10 or the right co-acting gear 7, it can be understood that: The rotation angle of the cutter bar 3 is restricted by the left co-acting gear 10 or the right co-acting 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 shaft is installed on the outer wall of one side of the planetary gear 6 corresponding to the orientation head 2. A co-acting sliding groove 18 corresponding to the fixed shaft is opened on the inner wall of the orientation head 2. The planetary gear 6 is rotatably connected to the orientation head 2 through the fixed shaft. On the outer wall of the side of the interior of the orientation head 2 away from the fixed shaft, a planetary carrier 8 is provided. The planetary gear 6 is rotatably connected to both ends of the planetary carrier 8. The planetary carrier 8 is rotatably connected to the cutter bar 3. The center point of the co-acting sliding groove 18 and the center point of the driving gear 11 are on the same axis.

[0036] Scheme description: Considering the transmission relationship between the sun gear and the planet gears, when the driving gear 11 is in a normal rotation state, the outer ring gear disk 5 is in a fixed state and the two planet gears 6 perform fixed-point rotation; or when the driving gear 11 is in a fixed state, the outer ring gear disk 5 is in a rotation state, and the planet gears 6 rotate around the driving gear 11.

[0037] In this embodiment, the key lies in controlling the rotation angle of the driving gear 11. When operating with a cutting stapler, the maximum switching angle of the cutter bar 3 needs to be preset. In this process, it mainly depends on the rotation process of the left co-acting gear 10 and the right co-acting gear 7 relative to the driving gear 11. Then, the tooth number ratio between the left co-acting gear 10, the right co-acting gear 7 and the driving gear 11 needs to be further restricted. The essence is as follows:

[0038] When the rotation angle of the cutter bar 3 has reached the maximum switching angle, the left co-acting gear 10 and the right co-acting gear 7 "reach" the position in advance. The essence is that the left co-acting gear 10 restricts the rotation of the driving gear 11, that is, the micro-motor 9 corresponding to the left co-acting gear 10 is in a stopped state. On the contrary, the micro-motor 9 corresponding to the right co-acting gear 7 serves as a working mechanism, driving the outer ring gear disk 5 to rotate through the right co-acting gear 7. In this state, the planet gears 6 rotate around the driving gear 11 during the rotation process, but the driving gear 11 remains in a fixed state.

[0039] Thus, referring to Figure 3 , the two planet gears 6 can rotate through a fixed axis in the orientation head 2 or rotate around the driving gear 11 through the co-acting sliding groove 18. The purpose is to maintain the stability of the cutter bar 3 and avoid deviations during the angle switching process of the cutter bar 3.

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

[0041] The action gear 17 is rotatably installed at a position on the inner wall of the orientation head 2 away from the planet carrier 8. The positioning gear 16 is installed at a position on the action gear 17 away from the center point of the inner wall of the planet carrier 8. And the center points of the action gear 17 and the right co-acting gear 7 or the left co-acting gear 10 are not collinear. The positioning disk 13 is rotatably installed at the center point position on the outer wall of one side of the planet gear 6 away from the planet carrier 8. The external gear bar 12 is installed at the position of the positioning disk 13 pointing to the right co-acting gear 7 or the left co-acting gear 10. The external gear bar 12 meshes 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. The mounting sleeve 14 is installed at the position of the inner wall of the orientation head 2 corresponding to the positioning gear 16. A coil spring piece 15 is arranged inside the mounting sleeve 14. One end of the coil spring piece 15 is installed at the position of the inner wall of the mounting sleeve 14. A rotating shaft is arranged at the center point of the positioning gear 16. The rotating shaft penetrates through the mounting sleeve 14 and is connected to the other end of the coil spring piece 15. The first half gear 1701 and the second half gear 1702 are arranged on the action gear 17. The first half gear 1701 and the second half gear 1702 mesh with the driving gear 11 and the outer ring gear disk 5 respectively. And the diameter of the first half tooth part 1701 is larger than that of the second half gear 1702.

[0042] Scheme description: In combination with Figure 6 and Figure 7 for description, when the planet gear 6 is rotating but not rotating around the driving gear 11, the position of the external gear bar 12 does not change. Refer to Figure 7 , because the position of the external gear bar 12 does not produce displacement 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 planet gears 6 will rotate around the driving gear 11 while rotating. 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 the same. Then the positioning gear 16 is synchronously driven to rotate at a certain angle. Because the center point of the action gear 17 and the positioning gear 16 coincide, the rotation angle of the action gear 17 is the same as that of the positioning gear 16. With Figure 7For example, when the two planetary gears 6 rotate counterclockwise around the driving gear 11, the positioning gears 16 and the actuating gears 17 therein rotate counterclockwise synchronously. Subsequently, the second half gear 1702 corresponding to the left cooperating gear 7 slowly approaches the outer ring gear disc 5, and the first half gear 1701 slowly approaches the driving gear 11. For the second half tooth portion 1702 corresponding to the right cooperating gear 10 slowly approaching the driving gear 11 and the first half tooth portion 1701 approaching the outer ring gear disc 5, it can be understood that the two actuating gears 17 are in an independent operating state relative to the left cooperating gear 7 and the right cooperating gear 10. Their operating process mainly drives the winding process of the coil spring piece 15, and as Figure 7 shown, there are differences in the diameters of the first half gear 1701 and the second half gear 1702;

[0044] The key role of the two actuating gears 17 is to further restrict the rotation process of the outer ring gear 5 when the driving gear 11 is "fixed". Although the two actuating gears 17 are driven by the planetary gears 6, due to structural characteristics limitations, as Figure 7 shown, when the second half tooth portion 1702 on the actuating gear 17 corresponding to the right cooperating gear 10 contacts the outer ring gear disc 5, the outer ring gear disc 5 will also be in a "locked" state for "secondary limiting" the tool bar 3. However, the purpose of setting the planetary gears 6 and the externally mounted gear bar 12 is that when the tool bar 3 "needs to be fixed", there is still a small amount of movement in the overall gear disc group to avoid affecting the operation stability of the physician when directly "locking".

[0045] To sum up: Structural improvements are made to 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 restrict the angle switching action of the tool bar. The basic transmission principles of the sun gear and the planetary gear are utilized, and on this basis, the left cooperating gear and the right cooperating gear are added. Their structures will not directly affect the transmission process of the driving gear, but "passively" restrict the rotation angle of the driving gear through the micro motor. Further, actuating gears associated with the left cooperating gear and the right cooperating gear are added. By using the meshing process of the actuating gears with the driving gear or the outer ring gear disc, an angle limiting process in the same process can be achieved, and then the movement direction and movement angle of the guiding tool bar can be restricted.

[0046] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

[0047] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may 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 illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A linear cutting stapler with built-in motion guiding function, comprising a handle, a directional head and a knife rod, characterized in that: The tool handle is provided with a drive assembly corresponding to the tool rod, and the directional head is provided with a gear plate group corresponding to the tool rod; 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; 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. A micro motor corresponding to the right cooperating gear and the left cooperating gear is 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; The gear train is a gear that is engaged with the gear and is engaged with the gear of the gear train, and the gear train is a gear that is engaged with the gear of the gear train and is interlocked with the gear of the gear train.

2. A linear cutting stapler with built-in motion guiding function according to claim 1, characterized in that: The center point of the cooperative sliding groove and the center point of the driving gear are on the same axis.

3. A linear cutting stapler with built-in motion guiding function according to claim 1, characterized in that: The directional head is provided with a mounting sleeve on the inner wall of the positioning gear, a coil spring is arranged inside the mounting sleeve, one end of the coil spring is mounted on the inner wall of the mounting sleeve, a rotating shaft is arranged at the center point of the positioning gear, the rotating shaft passes through the mounting sleeve and is connected to the other end of the coil spring.

4. The linear cutting stapler with built-in motion guiding function according to claim 1, characterized in that: The action gear is provided with a first half gear and a second half 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.

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