阅读说明：本技术 一种电动吻合器过载保护结构和电动吻合器 (Electric anastomat overload protection structure and electric anastomat ) 是由 毛训根 沈伟庆 陆春明 于 2021-09-26 设计创作，主要内容包括：本申请为一种电动吻合器过载保护结构,包括：驱动齿条,驱动齿轮和过载切换装置；过渡齿轮同时与驱动齿条和驱动齿轮啮合,用于将驱动齿轮的驱动力传递至驱动齿条；过渡齿轮与偏转壳体转动连接,且偏转壳体转动连接于偏转轴,偏压组件用于向偏转壳体提供偏压力,以使得偏转壳体提供过渡齿轮朝向驱动齿条的偏压力；过渡齿轮被设置为,当驱动齿条与过渡齿轮之间推力大于预设值时,过渡齿轮向偏转壳体提供克服偏压力的脱离推力,以使得偏转壳体相对偏转轴转动,过渡齿轮脱离驱动齿条。通过上述设置可以使得电动吻合器在遇到加载力过大时自动脱开,避免对器械破坏以及防止对人体造成意外伤害,且结构稳定可靠。(The application is an electronic anastomat overload protection structure, includes: a driving rack, a driving gear and an overload switching device; the transition gear is simultaneously meshed with the driving rack and the driving gear and is used for transmitting the driving force of the driving gear to the driving rack; a transition gear rotatably coupled to the deflection housing and the deflection housing rotatably coupled to the deflection shaft, the biasing assembly for providing a biasing force to the deflection housing such that the deflection housing provides a biasing force of the transition gear toward the drive rack; the transition gear is configured to provide a disengagement thrust to the deflection housing against the biasing force when the thrust between the drive rack and the transition gear is greater than a preset value to cause the deflection housing to rotate relative to the deflection shaft with the transition gear disengaged from the drive rack. Through the arrangement, the electric anastomat can be automatically separated when the loading force is too large, the damage to the instrument and the accidental injury to the human body are avoided, and the structure is stable and reliable.)

1. An overload protection structure of an electric anastomat is characterized by comprising:

the distal end of the driving rack (1) is used for pushing an executing component (8) of the electric anastomat;

the driving gear (2), the driving gear (2) is used for being in transmission connection with a driving motor (9) of the electric anastomat;

an overload switching device comprising a transition gear (3), a deflection housing (4), a deflection shaft (5) and a biasing assembly (6);

the transition gear (3) is meshed with the driving rack (1) and the driving gear (2) at the same time and is used for transmitting the driving force of the driving gear (2) to the driving rack (1);

the transition gear (3) is rotationally connected with the deflection housing (4), the deflection housing (4) is rotationally connected with the deflection shaft (5), and the biasing assembly (6) is used for providing a biasing force to the deflection housing (4) so that the deflection housing (4) provides the biasing force of the transition gear (3) towards the driving rack (1);

the transition gear (3) is arranged such that, when the thrust between the drive rack (1) and the transition gear (3) is greater than a preset value, the transition gear (3) provides a disengagement thrust to the deflection housing (4) against the biasing force, such that the deflection housing (4) rotates relative to the deflection shaft (5), the transition gear (3) disengaging from the drive rack (1).

2. An overload protection arrangement for an electric stapler according to claim 1, wherein the biasing member (6) is configured to switch to restrict rotation of the deflecting housing (4) relative to the deflecting shaft (5) when the deflecting housing (4) is deflected beyond a predetermined angle from the engaged position to the disengaged position of the transition gear (3).

3. An overload protection structure for an electric anastomat according to claim 2, characterized in that the biasing assembly (6) comprises a supporting boss (61), a supporting stop pin (62) and a biasing spring (63); the deflection shell (4) is provided with an accommodating cavity (41), a bias spring (63) is located in the accommodating cavity (41), one end of the bias spring is abutted to the inner wall of the accommodating cavity (41), the other end of the bias spring (63) is sleeved on the supporting stop pin (62), one end, far away from the bias spring (63), of the supporting stop pin (62) is abutted to the supporting boss (61), and the supporting boss (61) is relatively fixed with the deflection shaft (5).

4. An overload protection arrangement according to claim 3, characterised in that the receiving chamber (41) and the transition gear (3) are located on opposite sides of the deflection axis (5).

5. The overload protection structure for the electric anastomat according to claim 3, wherein a stop pin through hole (42) is formed in the accommodating cavity (41), the outer diameter of the stop pin is smaller than or equal to the inner diameter of the stop pin through hole (42), a limiting boss (64) is arranged on the supporting stop pin (62), the outer diameter of the limiting boss (64) is larger than the inner diameter of the stop pin through hole (42), the limiting boss (64) is located in the accommodating cavity (41), and one end of the supporting stop pin (62) abuts against the supporting boss (61) after penetrating through the stop pin through hole (42).

6. The overload protection structure of the electric anastomat as claimed in claim 3, wherein the limit boss (64) comprises a limit plane and a transition inclined plane, one end of the support stop pin (62) is provided with a stop pin inclined plane (65) matched with the transition inclined plane, when the transition gear (3) is in the engagement position, the transition inclined plane is attached to the stop pin inclined plane (65), and when the deflection shell (4) deflects from the engagement position to the disengagement position of the transition gear (3) by more than a preset angle, one end of the support stop pin (62) slides from the transition inclined plane to the limit plane.

7. An electric stapler overload protection arrangement according to claim 2, characterised in that the deflection housing (4) is provided with a reset button (7), the reset button (7) being adapted to overcome the biasing force of the biasing assembly (6) to drive the transition gear (3) out of the drive rack (1).

8. Electric stapler characterized by comprising an actuating assembly (8), a driving motor (9) and an overload protection structure of the electric stapler according to any one of claims 1-7.

Technical Field

The invention relates to a medical instrument, in particular to an overload protection structure of an electric anastomat and the electric anastomat.

Background

The anastomat has undergone a plurality of design improvements since birth, the original medical stapler is changed into the anastomat, and the anastomat starts to step into the third generation of electric endoscopic anastomosis era after two technical stages of a first generation of open anastomat and a second generation of endoscopic anastomat. Compared with a manual anastomat, the electric endoscope anastomat has a better hemostasis effect, so that the clinical value and the economic value are improved.

Intraluminal staplers can generally include two elongated jaw members that are used to grasp or clamp tissue, respectively. In some surgical staplers, one of the jaw members has a staple cartridge loaded with a plurality of staples arranged in at least two transverse rows, while the other jaw member has an anvil defining a surface for forming the staple legs as the staples are ejected from the staple cartridge. In a stapling operation, the knife blade travels between staple rows by pushing the knife blade to sequentially eject staples from the staple cartridge for longitudinally cutting stapled tissue therebetween.

In manual anastomat, the thrust during cutting can experience through operator's hand to in time stop operation when thrust is too big, and in electronic anastomat, to cutting to thick tissue or other proruption thrust increase's the condition, unable motor in time stop operation, the cost of setting up electronic component such as sensor and controller is higher, and when control program broke down, also unable realization shutdown control, cause danger easily. Therefore, it is necessary to provide an overload protection structure of an electric stapler having stable and reliable functions to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the structure of the electric anastomat is improved, so that the electric anastomat can be automatically separated when the loading force is too large, the damage to the instrument and the accidental injury to the human body are avoided, and the electric anastomat is stable and reliable in structure. The technical scheme of the invention is realized as follows:

this application technical scheme is for providing an electronic anastomat overload protection structure, and further preferably includes:

the distal end of the driving rack is used for pushing an executing component of the electric anastomat;

the driving gear is used for being in transmission connection with a driving motor of the electric anastomat;

an overload switching device comprising a transition gear, a yaw housing, a yaw shaft, and a biasing assembly;

the transition gear is simultaneously meshed with the driving rack and the driving gear and is used for transmitting the driving force of the driving gear to the driving rack;

the transition gear is rotationally coupled to the deflection housing and the deflection housing is rotationally coupled to the deflection shaft, the biasing assembly for providing a biasing force to the deflection housing such that the deflection housing provides a biasing force of the transition gear toward the drive rack;

the transition gear is configured to provide a disengagement thrust to the deflection housing against the biasing force when a thrust between the drive rack and the transition gear is greater than a preset value to cause the deflection housing to rotate relative to the deflection shaft with the transition gear disengaged from the drive rack.

Further preferably, the biasing assembly is configured to switch to restrict rotation of the deflector housing relative to the deflector shaft when the deflector housing is deflected beyond a predetermined angle from the transition gear engaged position to the disengaged position.

Further preferably, the biasing assembly comprises a support boss, a support catch and a biasing spring; the deflection shell is provided with an accommodating cavity, the bias spring is located in the accommodating cavity, one end of the bias spring is abutted to the inner wall of the accommodating cavity, the other end of the bias spring is sleeved with the supporting stop pin, one end of the supporting stop pin, far away from the bias spring, is abutted to the supporting boss, and the supporting boss is relatively fixed with the deflection shaft.

Further preferably, the accommodating cavity and the transition gear are located on both sides of the deflection shaft.

Further preferably, hold and be equipped with the backing pin through-hole on the chamber, the external diameter less than or equal to of backing pin the internal diameter of backing pin through-hole, support and be equipped with spacing boss on the backing pin, the external diameter of spacing boss is greater than the internal diameter of backing pin through-hole, spacing boss is located hold the intracavity, just the one end of supporting the backing pin passes behind the backing pin through-hole the butt in support the boss.

Further preferably, the limiting boss comprises a limiting plane and a transition inclined plane, one end of the supporting stop pin is provided with a stop pin inclined plane matched with the transition inclined plane, when the transition gear is located at the meshing position, the transition inclined plane is attached to the stop pin inclined plane, the deflection shell deflects from the meshing position of the transition gear to the disengaging position and exceeds a preset angle, and one end of the supporting stop pin slides to the limiting plane from the transition inclined plane.

Further preferably, the deflector housing is provided with a reset button for overcoming the biasing force of the biasing assembly to drive the transition gear out of engagement with the drive rack.

In another aspect, an electric stapler is provided, which includes an executing component, a driving motor, and the overload protection structure of the electric stapler.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

through set up overload auto-change over device in the anastomat for in the cutting tissue process, meet and run into thick tissue or other circumstances and cause the resistance too big, when causing thrust between drive rack and the transition gear too big, can effectively break away from transition gear and drive rack through the cooperation design of deflection casing and bias voltage subassembly, realize that electronic anastomat meets the automatic disengagement of loading power when too big, avoid destroying the apparatus and prevent to cause unexpected injury to the human body, and stable in structure is reliable.

Drawings

FIG. 1 is a schematic diagram of the overall external structure of an embodiment of the present application;

FIG. 2 is a schematic structural view of FIG. 1 with a portion of the housing removed;

FIG. 3 is an exploded view of the structure of FIG. 2;

FIG. 4 is an enlarged view of a portion of an overload protection structure according to an embodiment of the present application;

FIG. 5 is a schematic view of FIG. 4 with the deflector housing removed;

FIG. 6 is a schematic diagram of the transmission of the embodiment of the present application;

FIG. 7(a), (b) and (c) are force analysis diagrams of the transition gear and the driving rack according to the embodiment of the present application;

FIG. 8 is a force analysis diagram of the support latch as the transition gear engages the drive rack;

fig. 9 is a schematic structural view of the transition gear and the driving rack when they are disengaged.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the present application, the proximal end is the direction closer to the operator and the distal end is the direction away from the operator, according to the use description of the instrument.

The utility model relates to the field of medical equipment, especially, relate to an electronic anastomat overload protection structure and electronic anastomat, through set up overload auto-change over device in the anastomat, make at the cutting tissue in-process, meet and more meet thick tissue or other circumstances and cause the resistance too big, when causing thrust between drive rack and the transition gear too big, can be through the cooperation design of deflection casing and bias voltage subassembly, effectively break away from transition gear and drive rack, realize that electronic anastomat meets the automatic disengagement of loading power when too big, avoid destroying the apparatus and prevent to cause unexpected injury to the human body, and stable in structure is reliable.

Example (b):

as shown in fig. 1 to 9, in the present embodiment, an overload protection structure for an electric stapler is provided, which is suitable for use in an electric stapler, and the electric stapler in the present embodiment includes a handle housing 10, an executing assembly 8, a driving motor 9, a connecting tube and a driving assembly. The handle shell 10 is used for accommodating the driving motor 9 and part of the driving assembly, the driving assembly penetrates through the connecting pipe and then is in driving connection with the executing assembly 8, the executing assembly 8 comprises a clamping piece, a cutting knife and an executing push rod 81, the executing push rod 81 is used for pushing the cutting knife to cut tissues after the clamping piece is closed, and in the process, the suturing nail is pushed out along with the advancing of the cutting knife, so that the anastomosis process is realized. During the anastomosis procedure, if thick tissue is encountered, the incision or staple cannot be pushed out, which may cause the driving force of the actuating pushing rod 81 to become large, and if the stapling is stopped in time, the instrument may be damaged or the human body may be injured. Therefore, in the embodiment, an overload protection structure of an electric anastomat is designed, so that in the process of cutting the tissue, when the resistance is too large due to the fact that the tissue is thicker or other conditions are met, the power connection can be timely disconnected, the driving rack of the anastomat does not advance any more, and the anastomat is prevented from being damaged or injuring a human body.

Specifically, the present embodiment includes: a driving rack 1, a driving gear 2 and an overload switching device. The far end of the driving rack 1 is used for pushing an executing component 8 of the electric anastomat, in particular pushing an executing push rod 81 in the executing component 8, so that the executing component 8 executes an anastomosis action;

the driving gear 2 is used for being in transmission connection with a driving motor 9 of the electric anastomat, specifically, in the present embodiment, an output shaft of the driving motor 9 is fixedly connected with the driving gear 2, and in other embodiments, the driving gear may also be connected through another penetrating device to transmit power.

In the present embodiment, the overload switching apparatus includes a transition gear 3, a deflection housing 4, a deflection shaft 5, and a biasing assembly 6; through the structure of the overload switching device, when the thrust of the execution push rod 81 is too large, the transmission connection relation between the transition gear 3 and the driving rack 1 can be timely disconnected, so that the device is protected.

Specifically, in the present embodiment, the transition gear 3 is simultaneously engaged with the drive rack 1 and the drive gear 2 for transmitting the driving force of the drive gear 2 to the drive rack 1; the transition gear 3 is rotatably connected with the deflection housing 4 through a rotating shaft, the deflection housing 4 is rotatably connected with the deflection shaft 5, and the biasing assembly 6 is used for providing a biasing force to the deflection housing 4 so that the deflection housing 4 provides the biasing force of the transition gear 3 towards the driving rack 1; therefore, when driven within a range less than the preset thrust, the pinion 3 is always engaged with the drive rack 1 under the biasing action of the deflector housing 4.

The transition gear 3 is arranged such that, when the thrust between the drive rack 1 and the transition gear 3 is greater than a preset value, the transition gear 3 provides a disengagement thrust to the deflection housing 4 against the biasing force, such that the deflection housing 4 rotates relative to the deflection shaft 5, the transition gear 3 disengaging the drive rack 1.

Specifically, as shown in fig. 7(a), (b), and (c): during the meshing driving process of the driving rack 1 and the transition gear 3, the resultant force of the acting forces between each other is along the meshing line direction, the resultant force of the driving rack 1 to the transition gear 3 along the meshing line direction can be decomposed into a thrust force Fz2 along the pushing direction of the driving rack 1 and a thrust force Fr2 perpendicular to the driving rack 1 and facing the axial center direction of the transition gear 3, and similarly, the component forces in the two directions correspond to the two component forces Fz1 and Fz2 on the driving rack 1. Therefore, when the force applied to the actuator push rod 81 increases, Fz1 also increases gradually, and the reaction force Fz2 corresponding to Fz1 also increases, so that the resultant force of the forces acting between the drive rack 1 and the transition gear 3 does not change along the meshing line during the meshing drive, and therefore the direction of the resultant force does not change, and when Fz2 increases, the thrust Fr2 in the axial direction of the transition gear 3 also increases. When Fr2 is greater than the biasing force provided by the deflection housing 4 to the transition gear 3, the transition gear 3 disengages the drive rack 1.

When the transition gear 3 is separated from the driving rack 1, and the deflection shell 4 deflects from the engagement position of the transition gear 3 to the separation position by more than a preset angle, the state of the biasing assembly 6 is switched to limit the deflection shell 4 to rotate relative to the deflection shaft 5, namely, the biasing assembly 6 does not provide a biasing force towards the driving rack 1 to one end of the deflection shell 4 provided with the transition gear 3 any more, but realizes the locking of the deflection shell 4 through a locking structure or other locking structures, ensures that the anastomat cannot be automatically reconnected after the transmission of the anastomat is separated under the condition that the tissue is too thick and cannot be fired, and prevents the next mistaken firing.

In addition, a reset button 7 is also arranged and used for stopping working when the executive component fails in the process of anastomosis excitation. The reset button 7 can be pressed to disengage the transition gear from the drive rack. And then the jaw is opened by manually retracting a handle on the driving rack. Detachment from the tissue. Specifically, a reset button 7 is disposed outside one end of the deflector housing 4, the reset button 7 being used to overcome the biasing force of the biasing assembly 6 to drive the transition gear 3 out of the drive rack 1.

Specifically, the biasing assembly 6 performs the above function by adopting the following specific structure: the biasing assembly 6 includes a support boss 61, a support stop pin 62, and a biasing spring 63; the deflection shell 4 is provided with an accommodating cavity 41, a bias spring 63 is positioned in the accommodating cavity 41, one end of the bias spring is abutted against the inner wall of the accommodating cavity 41, the other end of the bias spring 63 is sleeved on a supporting stop pin 62, one end of the supporting stop pin 62 far away from the bias spring 63 is abutted against a supporting boss 61, and the supporting boss 61 is relatively fixed with the deflection shaft 5. The biasing spring 63 is in a compressed state so that both ends provide pressure to the inner wall of the receiving chamber 41 and the support stop pin 62, respectively, and the support boss 61 provides a counteracting support force to the support stop pin 62, thereby achieving that the deflection housing 4 continuously provides a biasing force that urges the transition gear 3 toward the drive rack 1. The specific stress direction is related to the stress surface direction of the supporting boss 61 and the supporting stop pin 62, and can be adjusted according to actual requirements.

Further preferably, the limit boss 64 includes a limit plane and a transition inclined plane, one end of the support stop pin 62 is provided with a stop pin inclined plane 65 matched with the transition inclined plane, when the transition gear 3 is at the engagement position, the transition inclined plane is attached to the stop pin inclined plane 65, and when the deflection housing 4 deflects from the engagement position to the disengagement position of the transition gear 3 by more than a preset angle, one end of the support stop pin 62 slides from the transition inclined plane to the limit plane; as shown in fig. 8 to 9, in the initial state, the pin slope 65 of the support pin 62 abuts against the transition slope of the support boss 61, and is decomposed into a horizontal force and a vertical force, wherein the vertical force is balanced with the axial force of the transition gear 3. In the process of increasing the axial force of the transition gear 3, the abutment force between the pin slope 65 of the support pin 62 and the transition slope of the support boss 61 becomes large, the biasing spring 63 is further compressed and the deflection housing 4 is further deflected, and the pin slope 65 of the support pin 62 slides along the transition slope of the support boss 61. When the transition gear 3 is separated from the driving rack 1, the deflection shell 4 deflects from the engagement position of the transition gear 3 to the separation position by more than a preset angle, the stop pin inclined surface 65 of the support stop pin 62 is separated from the transition inclined surface of the support boss 61, the plane of the support stop pin 62 is contacted with the limit plane of the support boss 61, the bias spring 63 continuously provides pressure for the support stop pin 62, the plane of the support stop pin 62 is kept abutted against the limit plane of the support boss 61, the stress direction is changed by switching the contact surfaces, and the locking of the deflection shell 4 is realized.

It is further preferred that the accommodating chamber 41 and the transition gear 3 are located on both sides of the deflection shaft 5, the deflection housing 4 rotates around the deflection shaft 5, and the biasing assembly in the accommodating chamber 41 and the transition gear 3 are balanced in force on both sides, so as to control the rotation of the deflection housing 4, and finally realize the protective disengagement of the transition gear 3.

Further preferably, in this embodiment, the accommodating cavity 41 is provided with a stop pin through hole 42, an outer diameter of the stop pin is smaller than or equal to an inner diameter of the stop pin through hole 42, the supporting stop pin 62 is provided with a limiting boss 64, the outer diameter of the limiting boss 64 is larger than the inner diameter of the stop pin through hole 42, the limiting boss 64 is located in the accommodating cavity 41, one end of the supporting stop pin 62 passes through the stop pin through hole 42 and abuts against the supporting boss 61, the stop pin through hole 42 is provided, so that one end of the supporting stop pin 62, which is connected with the biasing spring 63, is limited in the accommodating cavity 41 by the limiting boss 64, and the outer diameter of the limiting boss 64 is larger than the outer diameter of the biasing spring 63. The outer diameter of the support stopper pin 62 is preferably equal to the inner diameter of the stopper pin through hole 42, and the support stopper pin 62 can apply a force perpendicular to the central axis of the support stopper pin 62 to the stopper pin through hole 42 through the cylindrical side surface, thereby making the force transmission more stable and reliable.

In the embodiment, on the other hand, an electric anastomat is further provided, which specifically comprises a handle shell 10, an executing assembly 8, a driving motor 9, a connecting pipe and a driving assembly, wherein the driving assembly is provided with the overload protection structure.

According to the above embodiments, the present invention has the following advantages compared with the prior art:

through set up overload auto-change over device in the anastomat for in the cutting tissue process, meet and run into thick tissue or other circumstances and cause the resistance too big, when causing thrust between drive rack and the transition gear too big, can effectively break away from transition gear and drive rack through the cooperation design of deflection casing and bias voltage subassembly, realize that electronic anastomat meets the automatic disengagement of loading power when too big, avoid destroying the apparatus and prevent to cause unexpected injury to the human body, and stable in structure is reliable.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

As described above, the present invention has been explained fully in accordance with the gist of the present invention, but the present invention is not limited to the above-described embodiments and implementation methods, and features of the embodiments may be combined with each other without contradiction. A practitioner of the related art can make various changes and implementations within a range allowed by the technical idea of the present invention.