Gun body assembly suitable for electric anastomat

Abstract

The invention discloses a gun body assembly suitable for an electric anastomat. The gun body assembly at least comprises a fixed handle part, a universal handle part, an inner sleeve set arranged in the universal handle part and a swing head driving mechanism used for driving the execution end of a gun head of the electric anastomat to do left-right swing head movement, wherein the fixed handle part and the universal handle part are matched for use; wherein the inner sleeve group comprises a sleeve ring and a connecting frame which are matched for use; the lantern ring and the connecting frame are provided with axial through cavities which are connected in a penetrating mode, and at least one strip-shaped notch is formed in the side wall of the connecting frame in the length direction.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a gun assembly suitable for an electric stapler. Background Technology

[0002] A stapler is a medical device used as an alternative to manual suturing. Its main working principle is to use titanium staples to anastomose tissue. The stapler consists of a tube and jaws at the front end of the tube. The rear end of the tube connects to the stapler's main body for installation. For flexible use, a swing head assembly is included to control the stapler's left-right swinging motion for multi-angle operation.

[0003] There are several existing technologies for driving the left and right swing of a stapler. For example, CN222737932U discloses a swing head mechanism and end actuator for a stapler, which uses a push rod on one side to drive the fixed block drive unit to rotate the fixed block, enabling a larger rotation angle. Another example is CN119896504A, which discloses a swing head device and an electric stapler. When the angle of the staple head needs to be adjusted, the power mechanism drives the transmission mechanism to move axially along the stapler through a linkage, thereby driving the staple head to move laterally relative to the instrument platform along the stapler, realizing the electric automatic swing head of the electric stapler. Practical research and use have shown that the above driving methods have the simplest structure and a relatively low failure rate during use, and are therefore widely used. Based on this, the overall anastomosis device has a certain length. As for the transmission mechanism disclosed in CN119896504A, it is used to connect the motor in the anastomosis gun body and the actuator in the anastomosis gun head. Therefore, its overall length is relatively long. The stability and reliability of its movement process will directly affect the smoothness of the gun head swing process. Therefore, actual research has found that the above-mentioned transmission mechanism lacks a reliable support structure to improve the stability of the axial movement process.

[0004] Given the above, the internal installation space of the electric stapler is limited. Adding guiding and limiting structures for axial movement presents a significant technical challenge: ensuring the coordination and cooperation between these structures and other components without increasing the internal space. This requires adapting other structures to accommodate the added guiding and limiting structures. Designing a system that meets the added functional requirements while improving the rationality of the internal layout of different components necessitates careful design and improvement of the guiding and limiting structures and other supporting structures. Summary of the Invention

[0005] The purpose of this invention is to provide a gun body assembly suitable for electric staplers, so as to solve the technical problem of balancing the rationality of structural layout and the optimization of performance.

[0006] The gun assembly of the present invention for an electric stapler is implemented as follows: A gun body assembly for an electric stapler includes at least: a fixed handle portion and a universal handle portion for cooperative use, an inner sleeve assembly disposed in the universal handle portion, and a swing drive mechanism for driving the actuator end of the electric stapler head to swing left and right; wherein The inner sleeve assembly includes a collar and a connecting frame for use; the collar and the connecting frame have axial through cavities that are connected in a continuous manner, and the side wall of the connecting frame in the length direction has at least one strip-shaped notch; The head-swing driving mechanism includes: A linkage rod is located in the universal handle, and one end of the linkage rod is connected to a push rod located in the head of the electric stapler; the linkage rod and the push rod are coaxially distributed, and the end of the linkage rod away from the push rod extends into the connecting frame; A shaft-driven assembly includes a movable sleeve connected to a linkage rod and extending from a fixed handle portion to a universal handle portion, and a power structure provided in the fixed handle portion for driving the movable sleeve to move axially along the linkage rod; the movable sleeve portion passes through a collar and extends into a connecting frame. A shaft-shifting guide assembly is disposed in the universal handle portion, including at least one guide block connected to a movable sleeve, and a guide shaft that slides one-to-one with the guide block; the guide shaft is fixed in the housing of the universal handle portion, and the guide block passes through the strip-shaped notch and is connected to the movable sleeve.

[0007] In an optional embodiment of the invention, the collar includes an annular body and at least one limiting groove disposed in the sidewall of the annular body; the two ends of each limiting groove are distributed at different heights relative to the circumferential direction of the annular body; and The connecting frame includes a support body, a connecting post located at one end of the support body and adapted to be inserted into the inner hole of the annular body, and a boss located on the side wall of the connecting post and adapted to be inserted one-to-one into each limiting groove. The end face of the annular body facing the connecting frame is provided with slots that correspond one-to-one with each limiting slot and are suitable for the boss to enter the limiting slot. The strip-shaped notch is provided on the support body.

[0008] In an optional embodiment of the invention, the annular body is further provided with a fastening groove, and the two ends of the fastening groove along the circumferential direction of the annular body are distributed at different heights relative to the circumferential direction of the annular body; and The connecting column is provided with a fastening hole suitable for communicating with the fastening groove.

[0009] In an optional embodiment of the invention, the power structure includes a connector fixedly connected to the movable sleeve, and a lead screw module connected to the connector; The lead screw module includes a linear lead screw and a driver for driving the linear lead screw to rotate, and the connecting member is threadedly engaged with the linear lead screw.

[0010] In an optional embodiment of the invention, the linear lead screw is located beside the movable sleeve, and the axis of the linear lead screw is parallel to the axis of the movable sleeve.

[0011] In an optional embodiment of the invention, the end of the universal handle facing away from the fixed handle is further provided with an extension tube suitable for rotating synchronously with the universal handle. The extension tube is also provided with a limiting sleeve, and the side wall of the limiting sleeve is provided with a strip-shaped movable groove that slides with the linkage rod.

[0012] In an optional embodiment of the invention, the movable sleeve is connected to the linkage rod via a connecting block, and the connecting block is connected to the guide block.

[0013] In an optional embodiment of the invention, the connecting block has a hollow cavity for fitting a movable sleeve and an opening on one side end face of the connecting block that communicates with the cavity; and The end of the movable sleeve used for insertion into the cavity of the connecting block is provided with an annular limiting ring, and the outer diameter of the annular limiting ring is larger than the outer diameter of the movable sleeve; and The cavity of the connecting block has an annular limiting groove suitable for the insertion of the annular limiting ring.

[0014] In an alternative embodiment of the invention, the movable sleeve has a hollow cavity extending through its two axial ends.

[0015] In an optional embodiment of the invention, the guide block is further connected to a synchronizing block, and the synchronizing block is connected to a tension spring; and The housing of the universal handle is provided with a connecting seat for fixing the end of the tension spring away from the synchronizing block.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: Firstly, the gun body assembly of the present invention for an electric stapler, through its designed axial displacement guide component, can limit and guide the axial movement of the movable sleeve drive linkage rod and push rod, thereby improving the stability and reliability of the swing head drive mechanism during use. Secondly, the designed strip-shaped notch of the inner sleeve assembly facilitates its internal assembly and cooperation with the axial displacement guide component. In summary, the gun body assembly of the present invention, while improving the reliability and stability of the left and right swing head movement of the actuator end of the electric stapler, also improves the rationality of its internal structural layout, eliminating the need for additional assembly space inside the gun body. This allows some components of the overall gun body assembly to utilize existing mature technologies, minimizing the overall instrument manufacturing cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gun body portion of the gun body assembly applicable to an electric stapler of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of part A; Figure 3 This is a partial structural diagram of the gun body portion of the gun body assembly for an electric stapler according to the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the gun body portion of the gun body assembly for an electric stapler according to the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the disassembled structure of the gun body assembly and the corresponding gun head of the electric stapler of the present invention. Figure 6 for Figure 5 Enlarged schematic diagram of part B; Figure 7 This is a schematic diagram showing the layout of the inner sleeve assembly of the gun body component of the electric stapler of the present invention within the housing of the universal handle portion. Figure 8 This is a first-view structural schematic diagram of the inner sleeve assembly of the gun body component of the electric stapler of the present invention; Figure 9 This is a second-view structural schematic diagram of the inner sleeve assembly of the gun body component of the electric stapler of the present invention; Figure 10 This is a schematic diagram of the structure of the collar of the inner sleeve assembly of the electric stapler of the present invention; Figure 11 This is a schematic diagram of the connecting frame of the inner sleeve assembly of the electric stapler gun body component of the present invention; Figure 12 This is a schematic diagram of the mating structure between the connecting block and the movable sleeve of the inner sleeve assembly of the electric stapler of the present invention.

[0018] In the diagram: Gun head 100, push rod 101, locking block 1011, housing 200, linkage rod 201, locking groove 2011, movable sleeve 202, connecting part 203, linear screw 204, motor 205, transmission gear set 206, guide block 207, guide shaft 208, locking seat 209, locking groove 210, firing rod 211, connecting block 212, limit sleeve 214, movable groove 215. Synchronizing block 216, tension spring 217, connecting seat 218, annular limiting ring 219, cavity 220, opening surface 221, annular limiting groove 222, annular body 301, limiting groove 302, bracket body 303, connecting column 304, boss 305, strip notch 306, slot 307, fastening groove 308, fastening hole 309, inner hole 310, fixed handle part 400, extension tube 500. Detailed Implementation

[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Example 1: Please see Figures 1 to 12 As shown, this embodiment provides a gun body assembly suitable for an electric stapler, including at least: a fixed handle part and a universal handle part for cooperative use, an inner sleeve assembly disposed in the universal handle part, and a head-swinging drive mechanism for driving the actuator end of the gun head of the electric stapler to swing left and right.

[0021] The inner sleeve assembly includes at least: a mating collar and a connecting frame, the collar and the connecting frame having axially connected through cavities; both are assembled and fixed in the housing 200 of the universal handle portion. In terms of the length dimension along the universal handle portion of the electric stapler, the length of the connecting frame is much greater than that of the collar.

[0022] Specifically, the collar includes an annular body 301 and at least one limiting groove 302 disposed in the side wall of the annular body 301; the two ends of each limiting groove 302 are distributed at different heights relative to the circumference of the annular body 301. Referring to the accompanying drawings, one example is provided where three limiting grooves 302 are spaced apart in the circumferential direction of the annular body 301, and the specific structure of each limiting groove 302 is identical.

[0023] The connecting frame includes a support body 303, a connecting post 304 located at one end of the support body 303 and adapted to be inserted into the inner hole of the annular body 301, and a boss 305 located on the side wall of the connecting post 304 adapted to be inserted one-to-one into each limiting groove 302; the connecting post 304 and the inner hole 310 of the annular body 301 are clearance-fitted. Regarding the shape of the support body 303, it is generally cylindrical, and the side wall along the length direction of the support body 303 has at least one strip-shaped notch 306; in this regard, referring to the accompanying drawings, one example is that the support body 303 is designed with a strip-shaped notch 306, and the strip-shaped notch 306 occupies 1 / 5 to 1 / 3 of the circumferential cross-section of the support body 303. The designed strip-shaped notch 306 facilitates its internal assembly and mating with other components.

[0024] In the case where the annular body 301 is designed with three limiting grooves 302, the connecting column 304 is designed with three bosses 305. The three bosses 305 have the same structure, and the specific way in which the three bosses 305 are distributed along the circumference of the connecting column 304 matches the three limiting grooves 302 of the annular body 301. This allows the bosses 305 and the limiting grooves 302 to be arbitrarily combined during the assembly of the connecting frame and the collar, without the need for specific alignment.

[0025] Based on the above structure, it should also be noted that the end face of the annular body 301 facing the connecting frame is provided with slots 307 that correspond one-to-one with each limiting groove 302 and are suitable for the boss 305 to enter the limiting groove 302.

[0026] Furthermore, it is necessary to further explain that each boss 305 is conformally fitted with the corresponding limiting groove 302, and each boss 305 is clearance-fitted with the corresponding limiting groove 302. To illustrate this, referring to the accompanying drawings, one example is that the opening of each limiting groove 302 on the outer wall of the annular body 301 is a parallelogram.

[0027] Based on the above, regarding the fastening method of the connection structure formed between the collar and the connecting frame, optionally, the annular body 301 is further provided with a fastening groove 308, and the two ends of the fastening groove 308 along the circumference of the annular body 301 are distributed at different heights relative to the circumference of the annular body 301; and the connecting post 304 is provided with a fastening hole 309 suitable for communicating with the fastening groove 308. For example, the groove opening of the fastening groove 308 on the outer wall of the annular body 301 is waist-shaped; and the fastening hole 309 is a circular hole. The inner diameter of the fastening groove 308 in the long axis direction is much larger than the inner diameter of the fastening hole 309; and the fastening hole 309 is also suitable for screwing into a bolt that passes through the fastening groove 308.

[0028] Furthermore, the oscillating drive mechanism includes: a linkage rod 201, an axis shift drive assembly, and an axis shift guide assembly used in conjunction with it.

[0029] Specifically, firstly, there is the linkage rod 201, which is located in the universal handle portion, and one end of the linkage rod 201 is connected to the push rod 101 located in the head of the electric stapler; the linkage rod 201 and the push rod 101 are coaxially distributed; more specifically, the end of the linkage rod 201 used to connect to the push rod 101 is designed with a slot 2011, the shape of which can be, for example, but not limited to, U-shaped or V-shaped, and the push rod 101 is provided with a locking block 1011 suitable for engaging into the slot 2011. The specific shape of the locking block 1011 is not absolutely limited in this embodiment, as long as it can engage into the slot 2011 to achieve the connection between the linkage rod 201 and the push rod 101, it meets the usage requirements of this embodiment. As for the overall shape of the linkage rod 201, it can be selected as a strip-shaped sheet structure, which can reduce its occupancy rate of the internal space of the gun body 200.

[0030] Regarding the push rod 101, it is partially located inside the head 100 of the electric stapler, and one end of the push rod 101 extends into the universal handle of the electric stapler. Regarding the specific arrangement and implementation principle of the push rod 101 inside the head 100, any mature existing technology can be used, such as, but not limited to, the push rod 101 suitable for linear reciprocating motion disclosed in CN222737932U. This embodiment does not make absolute limitations on this part, so it will not be described in detail here. In this embodiment, the push rod 101 also achieves the left and right swinging effect of the electric stapler through its linear reciprocating motion.

[0031] Secondly, the axis shift drive assembly includes a movable sleeve 202 connected to the linkage rod 201 and extending from the fixed handle portion to the universal handle portion, and a power structure provided in the fixed handle portion for driving the movable sleeve 202 to move axially along the linkage rod 201; the movable sleeve 202 extends into the connecting frame after passing through the collar.

[0032] In an optional embodiment illustrated with reference to the accompanying drawings, the power structure includes a connector 203 fixedly connected to the movable sleeve 202, and a lead screw module connected to the connector 203. The lead screw module includes a linear lead screw 204 and a driver for driving the linear lead screw 204 to rotate. The connector 203 is threadedly engaged with the linear lead screw 204. The linear lead screw 204 is located beside the movable sleeve 202, and its axis is parallel to the axis of the movable sleeve 202. The driver can be a geared motor, or it can be a motor 205 that rotates the lead screw via a transmission gear set 206. This embodiment does not impose an absolute limitation on this. Based on this structure, the lead screw module can utilize the space beside the movable sleeve 202 without having to be distributed along the axial direction of the movable sleeve 202. Thus, for the handle of the electric stapler 200, it has a certain width (the dimension perpendicular to the axial displacement direction of the linkage rod 201). Therefore, from the perspective of the rationality of the internal space layout of the handle, using the lead screw module is more conducive to optimizing the utilization of the internal space of the handle.

[0033] Next, we will discuss the axis-shifting guide assembly, which is located in the universal handle portion. It includes at least one guide block 207 connected to the movable sleeve 202, and guide shafts 208 that slide in a one-to-one manner with each guide block 207. This embodiment, with reference to the accompanying drawings, illustrates a case using a pair of guide blocks 207 and a pair of guide shafts 208. Both ends of each guide shaft 208 are fixed within the housing 200 of the universal handle portion. The housing 200 of the universal handle portion is provided with a pair of locking seats 209 for one-to-one engagement with each guide shaft 208; each locking seat 209 has a locking groove 210 suitable for embedding the shaft end of the guide shaft 208.

[0034] Furthermore, it should be noted that, considering the need to configure an axially movable firing rod 211 inside the gun body 200 of the electric stapler, and also considering the optimization of the internal structural layout of the gun body 200, the movable sleeve 202 has a hollow cavity passing through its two axial ends. Based on this, the firing rod 211 can directly penetrate the movable sleeve 202. It should be noted that, in terms of the cross-sectional dimensions perpendicular to the axial direction of the movable sleeve 202, the movable sleeve 202 is larger than the firing rod 211. Based on this, neither the axial movement of the firing rod 211 nor the axial movement of the movable sleeve 202 will affect each other.

[0035] Furthermore, based on the above, the end of the universal handle facing away from the fixed handle is also provided with an extension tube 500 suitable for rotating synchronously with the universal handle. To further improve the reliability and stability of the overall linkage rod 201 during axial movement, the extension tube 500 in this embodiment is also provided with a limiting sleeve 214, and the side wall of the limiting sleeve 214 is provided with a strip-shaped movable groove 215 that slides with the linkage rod 201. During the axial movement of the linkage rod 201, the limiting sleeve 214 is fixed in the extension tube 500. Therefore, the linkage rod 201 moves in the movable groove 215, ensuring that the movement trajectory of the linkage rod 201 is stable and reliable. Of course, it can be understood here that the gun head 100 is also designed with a structure for limiting the movement trajectory of the push rod 101, such as a limiting groove.

[0036] Based on the above, and referring to the accompanying drawings, the movable sleeve 202 is connected to the linkage rod 201 via a connecting block 212, and the connecting block 212 is connected to the guide block 207. The connecting block 212 has a hollow cavity 220 for fitting the movable sleeve 202, and an opening 221 located on one side end face of the connecting block 212 and communicating with the cavity. The design of the cavity 220 here satisfies the layout requirements of the firing rod 211 on the one hand, and adapts to the layout requirements of the movable sleeve 202 on the other.

[0037] Based on the above, the end of the movable sleeve 202 that is inserted into the cavity 220 of the connecting block 212 is provided with an annular limiting ring 219, and the outer diameter of the annular limiting ring 219 is larger than the outer diameter of the movable sleeve 202; and the cavity of the connecting block 212 has an annular limiting groove 222 suitable for the annular limiting ring 219 to be inserted. This design allows the connecting block 212 to rotate with the universal handle while meeting the axial movement requirements of the linkage rod 201. As for the movable sleeve 202, it does not need to rotate synchronously with the universal handle. That is, the cooperation between the annular limiting ring 219 and the annular limiting groove 222 realizes the limitation of the axial position between the connecting block 220 and the movable sleeve 202, but the two can rotate relative to each other in the circumferential direction.

[0038] It should be noted that the connecting block 212 is located in the bracket body 303, while the guide block 207 needs to be connected to the guide shaft 208 fixed in the housing 200. Based on this, since the bracket body 303 in this embodiment has at least one strip-shaped notch 306 on its side wall along the length direction, the strip-shaped notch 306 provides clearance for the guide block 207. Therefore, for the connecting bracket itself, the designed strip-shaped notch 306 facilitates its internal assembly and cooperation with other components. Thus, for the inner sleeve assembly, it is easier to process and assemble while meeting usage requirements.

[0039] In summary, for the gun assembly of the electric stapler in this embodiment, along the length direction of the gun body 200 and the gun head 100 of the electric stapler, not only is the axial movement of the movable sleeve 202 guided and limited, but the movement trajectory of the linkage rod 201 is also limited and guided. Therefore, the reliability and stability of the linear movement of the push rod 101 as a whole are guaranteed, which can improve the smoothness of medical staff operating the electric stapler and reduce the difficulty of surgical operation. For the inner sleeve assembly, the initial positioning of the collar and connecting frame during assembly is achieved through the clearance fit between the connecting post 304 and the inner hole of the annular body 301. Then, the one-to-one fit between the boss 305 and the limiting groove 302 adjusts the mating position. Since the two ends of the limiting groove 302 along the circumference of the annular body 301 are distributed at different heights relative to the circumference of the annular body 301, when the boss 305 moves along the limiting groove 302, the corresponding connecting frame will change its mating position relative to the axial dimension of the collar. In other words, when the boss 305 is located at different positions in the limiting groove 302, the total dimensions of the assembled collar and connecting frame along the length of the universal handle of the electric stapler are different. This reduces the dimensional accuracy requirements of the inner sleeve assembly production process, thereby reducing production difficulty.

[0040] Example 2: Please see Figures 1 to 12 As shown, based on the gun body assembly for an electric stapler in Embodiment 1, the gun body assembly for an electric stapler provided in this embodiment also has the following design: The guide block 207 is also connected to a synchronizing block 216, and the synchronizing block 216 is connected to a tension spring 217; and the gun body 200 is provided with a connecting seat 218 for fixing the end of the tension spring 217 away from the synchronizing block 216. When a pair of guide blocks 207 are designed here, only one guide block 207 can be connected to the tension spring 217, or each guide block 207 can be connected to a tension spring 217. This embodiment does not make an absolute limitation on this.

[0041] Based on the above, it should be noted that when the actuator end of the electric stapler head 100 is parallel to the axis of the push rod 101, and the entire head 100 is in a non-swinging state, the tension spring 217 is in a natural elastic state, i.e., it does not deform. In this situation, when the push rod 101 moves away from the head 200 under the action of the movable sleeve 202 and the linkage rod 201 (the actuator end of the head 100 swings to one side), the tension spring 217 is slightly compressed and deformed. The design of the tension spring 217 prevents the swing speed of the actuator end from being too fast. In other words, the design of the tension spring 217 acts as a buffer during the swinging operation, thus facilitating accurate control of the swing amplitude by medical personnel and avoiding the problem of excessive swing speed leading to over-swinging and the need for repeated adjustments. During the resetting process of the actuator end, the tension spring 217 can assist in the resetting operation, accelerating the resetting speed. Similarly, when the push rod 101 moves toward the side of the gun body 200 under the action of the movable sleeve 202 and the linkage rod 201 (the actuator of the gun head 100 swings to the other side), the tension spring 217 is slightly stretched and deformed. At this time, the tension spring 217 also provides a buffering effect for the swinging operation process.

[0042] In summary, for the gun body assembly of the electric stapler in this embodiment, the design of the tension spring 217 serves to buffer the head-swinging process, thereby improving the controllability of the head-swinging operation.

[0043] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0044] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A gun body assembly for an electric stapler, characterized in that, At least comprising: a fixed handle part and a universal handle part used in cooperation, an inner sleeve group arranged in the universal handle part, and a swing drive mechanism for driving the execution end of the gun head of the electric anastomat to swing left and right; wherein The inner sleeve group comprises a sleeve ring and a connecting frame used in cooperation; the sleeve ring and the connecting frame have an axial through cavity connected through; and the connecting frame has at least one strip-shaped notch on the length direction side wall. The swing drive mechanism comprises: A linkage rod arranged in the universal handle part, and one end of the linkage rod is connected with a push rod arranged in the gun head of the electric anastomat; the linkage rod and the push rod are coaxially distributed, and the end of the linkage rod away from the push rod extends into the connecting frame; A shaft shift drive assembly comprising a movable sleeve connected with the linkage rod and extending from the fixed handle part to the universal handle part, and a power structure arranged in the fixed handle part for driving the movable sleeve to move along the axial direction of the linkage rod; the movable sleeve extends into the connecting frame after partially passing through the sleeve ring; A shaft shift guide assembly arranged in the universal handle part, comprising at least one guide block connected with the movable sleeve, and a guide shaft in one-to-one sliding cooperation with the guide block; the guide shaft is fixed in the shell of the universal handle part, and the guide block is connected with the movable sleeve after passing through the strip-shaped notch.

2. The gun assembly for an electrically powered surgical stapler of claim 1, wherein, The sleeve ring comprises a ring body and at least one limiting slot arranged in the side wall of the ring body; each limiting slot has two slot ends distributed high and low relative to the circumferential direction of the ring body along the circumferential direction of the ring body; and The connecting frame comprises a support body, a connecting column arranged at one end of the support body and suitable for being inserted into the inner hole of the ring body, and a boss arranged on the side wall of the connecting column and suitable for being inserted into each limiting slot in one-to-one; The end surface of the ring body towards the connecting frame is provided with a slot hole corresponding to each limiting slot and suitable for the boss entering the limiting slot; The strip-shaped notch is arranged on the support body.

3. The gun assembly for an electrically powered surgical stapler of claim 2, wherein, The ring body is further provided with a fastening slot, and the two slot ends of the fastening slot are distributed high and low relative to the circumferential direction of the ring body along the circumferential direction of the ring body; and The connecting column is provided with a fastening hole suitable for penetrating the fastening slot.

4. The gun assembly for an electrically powered surgical stapler of claim 1, wherein, The power structure comprises an adapter fixedly connected with the movable sleeve, and a lead screw module connected with the adapter; The lead screw module comprises a linear lead screw and a driver for driving the linear lead screw to rotate, and the adapter is in threaded cooperation with the linear lead screw.

5. The gun assembly for an electrically powered surgical stapler of claim 4, wherein, The linear lead screw is arranged beside the movable sleeve, and the axis of the linear lead screw is parallel to the axis of the movable sleeve.

6. The gun assembly for an electrically powered surgical stapler of claim 1, wherein, The end of the universal handle part away from the fixed handle part is further provided with an extension pipe suitable for rotating synchronously with the universal handle part; The extension pipe is further provided with a limiting sleeve, and the side wall of the limiting sleeve is provided with a strip-shaped movable slot in sliding cooperation with the linkage rod.

7. The gun assembly for an electrically powered surgical stapler of claim 1, wherein, The movable sleeve is connected with the linkage rod through an adapter block, and the adapter block is connected with the guide block.

8. The gun assembly for an electrically powered surgical stapler of claim 7, wherein, The adapter block has a hollow cavity for cooperating with the movable sleeve, and an opening surface arranged on one side end face of the adapter block and in communication with the cavity; and The end surface of the ring body towards the connecting frame is provided with a slot hole corresponding to each limiting slot and suitable for the boss entering the limiting slot; The end of the movable sleeve inserted into the cavity of the adapter block is provided with a ring-shaped limiting ring, and the outer diameter of the ring-shaped limiting ring is greater than the outer diameter of the movable sleeve; and The cavity of the adapter block is provided with a ring-shaped limiting groove suitable for clamping the ring-shaped limiting ring.

9. The gun assembly for an electrically powered surgical stapler of claim 1 or 2, wherein, The movable sleeve has a hollow cavity penetrating through both axial ends thereof.

10. The gun assembly for an electrically powered surgical stapler of claim 9, wherein, The guide block is further connected with a synchronizing block, and the synchronizing block is connected with a tension spring; and The shell of the universal handle part is provided with a connecting seat for fixing one end of the tension spring away from the synchronizing block.

Images