Disengagement of retrieval devices and medical equipment

Abstract

The present disclosure provides a disengagement and withdrawal device and medical equipment, wherein the device includes a transmission structure, a disengagement structure and a withdrawal structure. The transmission structure is used for the operation control of the medical equipment, wherein the transmission structure includes: a gear assembly and a transmission assembly, the gear assembly is used to provide transmission force for the transmission structure; the transmission assembly is arranged in cooperation with the gear assembly and connected to the medical equipment. Under normal conditions, the disengagement structure abuts against the gear assembly, and under abnormal conditions, the disengagement structure is used to achieve the disengagement between the gear assembly and the transmission assembly. The withdrawal structure is arranged adjacent to the transmission structure, and after the gear assembly and the transmission assembly are disengaged, it is used to control the transmission assembly to achieve withdrawal. Thereby, the above-mentioned device of the present disclosure can realize the emergency automatic disengagement and manual withdrawal process of the medical equipment under abnormal conditions, thereby reducing the surgical risk, improving the safety performance of the use of medical equipment, and ensuring the smooth progress of the medical process.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a disengagement and withdrawal device and a medical device. Background Art

[0002] In the modern medical system, various medical devices are widely used, especially various medical surgical equipment, such as laparoscopic electric staplers commonly used in minimally invasive surgery. Among them, various types of medical equipment have various transmission mechanisms for clamping, cutting and other medical action control. Taking the electric stapler as an example, its intraoperative firing function module can achieve the clamping, anastomosis, cutting and loosening of organ tissues through the action of the transmission mechanism under normal conditions. However, during the use of the electric stapler, the gear transmission mechanism may be overloaded due to electrical failure, mechanical failure or improper operation, resulting in excessive jaw squeezing force, thereby crushing the patient's organ tissue, or the jaws cannot be opened after clamping the patient's organ tissue, the stapler cannot be removed from the patient's body, or the stapler components are damaged after the load exceeds the strength limit, causing parts to fall into the patient's body. The above various abnormal situations may cause damage to the patient's local organ tissue at the least, or even turn the minimally invasive surgery into an open surgery, causing serious secondary injuries to the patient, and greatly increasing the difficulty and risk of the surgery. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the technical problem that medical equipment such as laparoscopic electric staplers in the prior art may experience electrical failure, mechanical failure or improper operation during surgery, which may lead to abnormal conditions such as overload of the gear transmission mechanism, resulting in excessive jaw pressing force and thus causing a significant increase in surgical difficulty and risk, the present invention provides a disengagement and withdrawal device and a medical device.

[0005] (II) Technical solution

[0006] One aspect of the present disclosure provides a disengagement and withdrawal device, which is applied to medical equipment, and includes a transmission structure, a disengagement structure and a withdrawal structure. The transmission structure is used for the operation control of the medical equipment, and the transmission structure includes: a gear assembly and a transmission assembly, the gear assembly is used to provide transmission force for the transmission structure; the transmission assembly is arranged in cooperation with the gear assembly and is connected to the actuator of the medical equipment. Under normal conditions, the disengagement structure abuts against the gear assembly, and under abnormal conditions, the disengagement structure is used to achieve the disengagement between the gear assembly and the transmission assembly. The withdrawal structure is arranged adjacent to the transmission structure, and is used to control the transmission assembly to achieve withdrawal after the gear assembly and the transmission assembly are disengaged.

[0007] According to an embodiment of the present disclosure, the device further includes a support structure. The support structure is connected to the transmission structure, the disengagement structure and the withdrawal structure, and plays a structural support role, wherein the support structure includes a support seat, a transmission groove and an axle frame. The support seat has a hollow accommodation space inside, and the gear assembly and the disengagement structure are arranged in the accommodation space in cooperation; the transmission groove is recessed in the upper surface of the support seat and penetrates the support seat, and the transmission assembly is arranged in the transmission groove and moves relatively along the transmission groove. The axle frame is arranged on the upper surface of the support seat along both sides of the transmission groove, and the withdrawal structure is arranged on the axle frame corresponding to the transmission groove.

[0008] According to an embodiment of the present disclosure, the gear assembly includes a driving gear, a transmission idler gear and a propulsion gear portion, wherein the driving gear is used to provide driving force for the gear assembly; the transmission idler gear is meshed with the driving gear; the propulsion gear portion is meshed with the transmission idler gear and is also meshed with the transmission assembly, and is used to be driven to rotate by the transmission idler gear under normal conditions to provide transmission force to the transmission assembly, thereby pushing the transmission assembly to move relative to the transmission groove.

[0009] According to an embodiment of the present disclosure, the propulsion gear unit includes a gear shaft, a propulsion gear and a transmission gear. The gear shaft penetrates the propulsion gear unit along the rotation axis of the propulsion gear unit to provide rotation support; the propulsion gear is arranged on the gear shaft and meshed with the transmission assembly; the transmission gear is arranged on the gear shaft in parallel with the propulsion gear and at intervals, and meshed with the transmission idler gear.

[0010] According to an embodiment of the present disclosure, the propulsion gear unit further includes a shaft sleeve and a bearing. The shaft sleeve is sleeved on the gear shaft and arranged between the propulsion gear and the transmission gear; and the bearing is sleeved on the end of the gear shaft.

[0011] According to an embodiment of the present disclosure, the support seat includes an axial groove, which is arranged perpendicular to the moving direction of the transmission assembly and passes through the upper surface of the support seat; wherein the bearing of the propulsion gear part is arranged in the axial groove, and in a normal state, is located at one end of the axial groove close to the transmission assembly, and after disengagement is achieved, is located at one end of the axial groove away from the transmission assembly.

[0012] According to an embodiment of the present disclosure, the transmission assembly includes a first tooth surface and a second tooth surface. The first tooth surface is arranged on the transmission assembly and meshes with the gear assembly; the second tooth surface is arranged on the transmission assembly corresponding to the first tooth surface and corresponds to the retraction structure.

[0013] According to an embodiment of the present disclosure, the disengagement structure includes a locking portion and a twisting portion. The locking portion is arranged on one side of the gear assembly, and in a normal state, one end of the locking portion abuts against the outer wall surface of the shaft sleeve of the gear assembly; the twisting portion is arranged at the other end of the locking portion to provide a twisting force for the locking portion to abut against the outer wall surface of the shaft sleeve.

[0014] According to an embodiment of the present disclosure, the locking part includes an abutment end, an extension arm and a vertical seat. The abutment end is arranged at the top end of the locking part and abuts against the outer wall surface of the sleeve in a normal state; the extension arm is connected to the abutment end; the vertical seat is vertically connected to the extension arm, and the locking part is connected to the torsion part, so that the locking part is connected and arranged on the support seat through the torsion part.

[0015] According to an embodiment of the present disclosure, the torsion part includes a torsion shaft and a first torsion spring. The torsion shaft is sleeved in at least two shaft holes of the vertical seat of the locking part, and the main body of the torsion shaft is perpendicular to the upper surface of the support seat, and both ends are sleeved in the support seat; the first torsion spring is sleeved on the torsion shaft and is located between the at least two shaft holes of the vertical seat of the locking part.

[0016] According to an embodiment of the present disclosure, the disengagement structure also includes a limit member, and the connection area between the limit member corresponding to the abutment end and the extension arm is arranged on the support seat; wherein, when the locking part is in an abnormal state, due to the external force generated by the gear assembly, the torsional force of the torsion part is overcome and moved to the outside of the support seat to achieve the disengagement of the locking part and the gear assembly, the limit member limits the locking part, so that the gear assembly can be disengaged from the transmission assembly.

[0017] According to an embodiment of the present disclosure, the retraction structure includes a handle, a rocker and a pawl. The handle is used for manual gripping and applying force to the retraction structure; the rocker is rotatably connected to the handle and fixed to the shaft frame; the fixed end of the pawl is rotatably connected to the rocker and is located between the transmission slot and the rocker. In an abnormal state, the top end of the pawl abuts against the transmission assembly.

[0018] According to an embodiment of the present disclosure, the retraction structure further includes a first transverse axis, a second transverse axis and a second torsion spring. The first transverse axis passes through an axis frame, and the fixed end of the rocker is sleeved on the first transverse axis; the second transverse axis is located below the first transverse axis and passes through a rocker, and the fixed end of the pawl is sleeved on the second transverse axis; the second torsion spring is sleeved on the second transverse axis and is located at the connection position between the pawl and the rocker.

[0019] According to an embodiment of the present disclosure, the retraction structure further includes a push rod. The push rod passes through the support seat and is arranged perpendicular to the transmission slot, wherein the push rod includes a cone head and a column. The cone head is arranged corresponding to the surface of the rocker that is perpendicular to the transmission slot and close to one side of the disengagement structure; one end of the column is connected to the cone head, and the other end abuts against the disengagement structure. In the retraction process, the cone head is acted upon by the rocker, so that the push rod moves perpendicular to the transmission slot and abuts against the disengagement structure, so that the disengagement structure and the gear assembly remain in a disengaged state.

[0020] Another aspect of the present disclosure provides a medical device, comprising the above-mentioned disengagement and withdrawal device.

[0021] (III) Beneficial effects

[0022] The present disclosure provides a disengagement and withdrawal device and medical equipment, wherein the device includes a transmission structure, a disengagement structure and a withdrawal structure. The transmission structure is used for the operation control of the medical equipment, wherein the transmission structure includes: a gear assembly and a transmission assembly, the gear assembly is used to provide transmission force for the transmission structure; the transmission assembly is arranged in cooperation with the gear assembly and connected to the medical equipment. Under normal conditions, the disengagement structure abuts against the gear assembly, and under abnormal conditions, the disengagement structure is used to achieve the disengagement between the gear assembly and the transmission assembly. The withdrawal structure is arranged adjacent to the transmission structure, and after the gear assembly and the transmission assembly are disengaged, it is used to control the transmission assembly to achieve withdrawal. By this, the above-mentioned device of the present disclosure can realize the emergency automatic disengagement and manual withdrawal process of the medical equipment under abnormal conditions, thereby reducing the surgical risk, improving the safety performance of the use of medical equipment, and ensuring the smooth progress of the medical process, which has extremely high economic value and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A A three-dimensional structural diagram of the disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (handle folded state);

[0024] Figure 1B Another three-dimensional structural diagram of the disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (handle extended state);.

[0025] Figure 2 A side structural diagram of a disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (handle folded state);

[0026] Figure 3 A three-dimensional exploded view of a disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown;

[0027] Figure 4 A schematic perspective view of the disengagement structure and the gear assembly of the disengagement and retraction device according to an embodiment of the present disclosure is shown;

[0028] Figure 5 A schematic top view of the disengagement structure and the gear assembly of the disengagement and retraction device according to an embodiment of the present disclosure is shown;

[0029] Figure 6 A schematic perspective view of the structural composition of the retraction structure of the disengagement and retraction device according to an embodiment of the present disclosure is shown;

[0030] Fig. 7A A three-dimensional structural diagram of the disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (without a support seat and with the handle extended);

[0031] Figure 7BAnother three-dimensional structural diagram of the disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (without a support seat and with the handle extended);

[0032] Figure 7C Another three-dimensional structural diagram of the disengagement and withdrawal device according to an embodiment of the present disclosure is schematically shown (without the support seat and with the handle extended). DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of various elements and methods are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0035] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0036] Moreover, the shapes and sizes of the components in the figures do not reflect the real size and proportion, but only illustrate the contents of the embodiments of the present disclosure. In addition, in the claims, any reference symbols between brackets shall not be constructed as limiting the claims.

[0037] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0038] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element or the order of manufacturing methods. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0039] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose. Furthermore, in a unit claim that lists several devices, several of these devices may be embodied by the same hardware item.

[0040] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various disclosed aspects, in the above description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: the claimed disclosure requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the disclosed aspects lie in less than all the features of the single embodiment disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present disclosure.

[0041] In order to solve the technical problem in the prior art that the gear transmission mechanism of the laparoscopic electric stapler may be overloaded due to electrical failure, mechanical failure or improper operation during surgery, resulting in excessive jaw pressing force, thereby greatly increasing the difficulty and risk of the surgery, the present invention provides a disengagement and withdrawal device and a medical device.

[0042] At present, for the emergency disengagement and withdrawal of the actuator in the case of overload of the gear transmission mechanism, based on the field of medical device technology, taking the commonly used electric stapler as an example, the existing technology has provided a variety of solutions, but the design scheme still needs to be improved, and the use effect still needs to be improved, which is specifically reflected as follows:

[0043] The existing mainstream electric stapler products mainly adopt two emergency disengagement and withdrawal solutions to deal with the overload of the firing transmission mechanism, including:

[0044] (1) Option 1: The emergency disengagement gear of the gear transmission mechanism can slide in the axial direction of the core shaft, and the axial positioning is achieved by the spring force on the axial direction of the core shaft. When working normally, the emergency disengagement gear is meshed with other gears / racks of the transmission mechanism. When the transmission mechanism is overloaded or even stuck, the gear can be manually pushed to move axially until the emergency disengagement gear is disengaged from the gear / rack it is meshing with, and the power input is disconnected; the retraction of the firing mechanism actuator is manually pulled back by the ratchet. However, when the gear transmission mechanism is overloaded, the pressure between the meshing gears / racks increases, the sliding friction increases, and even the gear core shaft is deformed, making it difficult to disengage manually.

[0045] (1) Option 2: The stapler power system and the clamp end are separated, and the two parts of the body are connected by a quick-release part. When the gear transmission mechanism is overloaded, the stapler clamp end is manually separated from the power system, and a special manual tool is installed to retract the firing actuator. This solution is more complex to manufacture and has high production costs. It requires the use of a special retraction tool and is more cumbersome to operate. If there is an emergency during surgery, the medical staff will be nervous and the difficulty of operation will increase.

[0046] Therefore, both of the above two existing technical solutions are to manually disengage and withdraw the gear transmission mechanism through manual operation when an overload condition occurs. This is highly dependent on the reaction speed and usage experience of medical staff, and there is a possibility of misoperation. The safety and convenience still need to be improved.

[0047] In order to solve the technical problem that medical equipment such as laparoscopic electric staplers in the prior art may experience abnormal conditions such as overload of the gear transmission mechanism due to electrical failure, mechanical failure or improper operation of the gear transmission mechanism during surgery, resulting in excessive jaw pressing force and thus causing a significant increase in surgical difficulty and risk, the present invention provides a disengagement and withdrawal device and a medical device.

[0048] As shown in Figure 1- Figure 7C As shown, one aspect of the present disclosure provides a disengagement and withdrawal device, which is applied to medical equipment, wherein the device includes a transmission structure 100, a disengagement structure 200 and a withdrawal structure 300. The transmission structure 100 is used for the operation control of the medical equipment, wherein the transmission structure 100 includes: a gear assembly 110 and a transmission assembly 120, wherein the gear assembly 110 is used to provide transmission force for the transmission structure 100; the transmission assembly 120 is arranged in cooperation with the gear assembly 110 and connected to the medical equipment. In a normal state, the disengagement structure 200 abuts against the gear assembly 110, and in an abnormal state, the disengagement structure 200 is used to achieve the disengagement between the gear assembly 110 and the transmission assembly 120. The withdrawal structure 300 is arranged adjacent to the transmission structure 100, and after the gear assembly 110 and the transmission assembly 120 are disengaged, it is used to control the transmission assembly 120 to achieve withdrawal.

[0049] The transmission structure 100 can perform transmission operations, which are specifically reflected in the movement of some components of the transmission structure 100, such as sliding or rolling along a groove or a track. The transmission structure 100 is connected to the medical device and controls the medical operation of the medical device.

[0050] Specifically, in the embodiment of the present disclosure, the gear assembly 110 of the transmission structure 100 provides a transmission force for the transmission structure 100, and drives the transmission assembly 120 of the transmission structure 100 to move, for example, the transmission assembly 120 slides along a preset groove. Therefore, under normal circumstances, the gear assembly 110 and the transmission assembly need to be arranged in a coordinated manner, such as meshing, that is, the propulsion gear in the gear assembly 110 can mesh with the corresponding component of the transmission assembly 120, and when the propulsion gear of the gear assembly 110 rotates, the corresponding component of the transmission assembly 120 is driven by propulsion and moves accordingly. Therefore, after the transmission assembly 120 is connected to the operating component of the medical device (such as the firing execution component of the electric stapler), the corresponding medical operation performed by the medical device can be driven by the movement of the transmission assembly 110 itself.

[0051] In a normal state, the gear assembly 110 and the transmission assembly 120 will have a mutually coordinated relationship, for example, it can be a meshing relationship between the gear assembly 110 and the transmission assembly 120. In this state, the gear assembly 110 will be driven by a driving force to push the transmission assembly 120 to move and realize the medical operation control of the medical device, and the contact force between the two will not change significantly over time. In an abnormal state, the cooperation between the transmission assembly 120 and the gear assembly may be abnormal due to improper medical operation of the medical device, mechanical failure or electrical fault light, such as a sudden increase in contact force, such as overload of contact between the transmission assembly 120 and the gear assembly 110, and an increase in sliding friction, so that the cooperation between the two cannot be disengaged or it is difficult to disengage, so that the medical operation cannot be continued and cannot be effectively exited, which is easy to cause damage to the medical device and the transmission structure 100, as well as interruption of the medical process, increasing the difficulty and risk of medical treatment.

[0052] Therefore, in order to facilitate the retraction of the transmission assembly 120 under abnormal conditions, thereby controlling the retraction of the medical equipment, effectively reducing medical risks and difficulties, and preventing damage to the equipment, it is necessary to achieve the disengagement between the gear assembly 110 and the transmission assembly 120 to prevent the gear assembly 110 from getting stuck in the transmission assembly 120, making it difficult to retract the transmission assembly 120.

[0053] Under normal conditions, the abutment between the disengagement structure 200 and the gear assembly 110 is used to apply an abutment force to the gear assembly, so that the gear assembly 110 and the transmission assembly 120 maintain a matching state, such as a meshing state. Under abnormal conditions, the disengagement structure 200 can remove the abutment force between the gear assembly 110, so that the gear assembly 110 can be easily disengaged from the transmission assembly 120. The so-called abutment can be a contact between a sharp position and a plane, a sharp position and a sharp position, or a plane and a plane, and this contact has a force-applying effect.

[0054] In a normal state, the retraction structure 300 can maintain a separation state with the transmission assembly 120, that is, no contact. In an abnormal state, the retraction structure 300 can achieve contact with the transmission assembly 120, and can apply external force to the transmission assembly 120. At the same time, when the gear assembly 110 is disengaged from the transmission assembly 120, the propulsion force of the transmission assembly 120 from the gear assembly 110 and the matching contact external force disappear, so that the maximum external force on the transmission assembly 120 comes from the contact force of the retraction structure 300. The contact force can make the transmission assembly 120 retract at this time, so as to achieve the retraction of the transmission assembly 120.

[0055] Therefore, in the case of an abnormal overload of the transmission assembly 120 due to electrical failure, mechanical failure or improper use, the disengagement and withdrawal device of the embodiment of the present disclosure can realize the emergency automatic disengagement between the gear assembly 110 and the transmission assembly 120, and further enable the transmission assembly 120 to be manually withdrawn. That is, when the gear assembly 110 and the transmission assembly 120 are overloaded, the power transmission of the transmission assembly 120 can be automatically disconnected in an emergency, and the transmission assembly 120 can be manually withdrawn as needed, so that the operation execution components of the medical device connected to the transmission assembly 120 can be withdrawn, which can reduce the surgical risk, reduce the technical requirements of the medical equipment for the user in abnormal situations, improve the safety performance of the medical equipment, and ensure the smooth progress of the medical process (such as minimally invasive surgery), with high economic and social benefits.

[0056] It should be particularly noted that the disengagement and retraction device of the embodiment of the present disclosure can automatically disengage when the gear transmission mechanism of the gear assembly and the transmission assembly is overloaded to cut off the power input. No manual operation is required, which is quick and convenient. The emergency disengagement operation is completely automatically realized by the mechanical structure, which is stable and reliable, and reduces the skill requirements for equipment operators.

[0057] Thereby, the above-mentioned device disclosed in the present invention can realize the emergency automatic disengagement and manual withdrawal process of the medical equipment under abnormal conditions, thereby reducing the surgical risks, improving the safety performance of the use of medical equipment, and ensuring the smooth progress of the medical process.

[0058] like Figure 1A-Figure 3As shown, according to an embodiment of the present disclosure, the device further includes a support structure 400. The support structure 400 is connected to the transmission structure 100, the disengagement structure 200 and the withdrawal structure 300, and plays a structural support role. Among them, the support structure 400 includes a support seat 410, a transmission groove 420 and an axle frame 430. The support seat 410 has a hollow accommodating space 401 inside, and the gear assembly 110 and the disengagement structure 200 are arranged in the accommodating space 401 in cooperation; the transmission groove 420 is recessed in the upper surface of the support seat 410 and penetrates the support seat 410, and the transmission assembly 120 is arranged in the transmission groove 420 and moves relatively along the transmission groove 420. The axle frame 430 is arranged on the upper surface of the support seat 410 along both sides of the transmission groove 420, and the withdrawal structure 300 is arranged on the axle frame 430 corresponding to the transmission groove 420.

[0059] The support structure 400 is used to support the entire device. Therefore, the support structure 400 has a support skeleton, which is an integrally formed hollow structure composed of multiple plate structures. Generally, the support structure 400 is required to withstand external forces and apply stable force during the disengagement and withdrawal process. The material forming the support skeleton is generally relatively stable and has good hardness and quality.

[0060] The support seat 410 is the main structure of the support frame, and the interior is hollowed out to form a receiving space 401 for installing the gear assembly 110 and the disengagement structure 200 of the transmission structure 100. With the support of the support seat 410, the abutment effect between the disengagement structure 200 and the gear assembly 110 is achieved.

[0061] The bottom and side of the transmission groove 420 are connected to the above-mentioned accommodating space 401 to varying degrees, so when the transmission assembly 120 is arranged along the transmission groove 420, it can be arranged in coordination with the gear assembly 110 in the accommodating space 401. The transmission groove 420 is a through groove. Under normal conditions, the transmission assembly 120 can move relatively in the transmission groove 420 after receiving the driving force of the gear assembly 110. Under abnormal conditions, the transmission assembly 120 is disengaged from the gear assembly 110 and will be subjected to the force of the withdrawal structure 300 to withdraw in the transmission groove 420.

[0062] The shaft frame 430 is a part of the support frame, and can be integrally formed with the support seat 410. The shaft frame 430 can have two separate support plates, which are parallel and separate on both sides of the transmission groove 420. The withdrawal structure 300 is arranged between the two support plates to achieve rotational connection with the shaft frame 430. In this way, the withdrawal structure 300 can contact and apply force to the transmission assembly 120 when the transmission assembly 120 is disengaged from the gear assembly 110 in an abnormal state, so as to withdraw the transmission assembly 120 to the original state.

[0063] Figure 1A-Figure 5 as well as Figure 7A-7CAs shown, according to an embodiment of the present disclosure, the gear assembly 110 includes a driving gear 111, a transmission idler gear 112 and a propulsion gear portion 113, the driving gear 111 is used to provide driving force for the gear assembly 110; the transmission idler gear 112 is meshed with the driving gear 111; the propulsion gear portion 113 is meshed with the transmission idler gear 112, and is also meshed with the transmission assembly 120, and is used for being driven to rotate by the transmission idler gear 112 under normal conditions, so as to provide transmission force to the transmission assembly 120, and push the transmission assembly 120 to move relatively along the transmission groove 420.

[0064] The gear assembly 110 including the driving gear 111, the transmission idler gear 112 and the propulsion gear part 113 is all disposed in the accommodation space 401 of the support seat 410. The driving gear 111 is connected to the output shaft of the driving motor. When the driving motor is running, it can drive the driving gear 111 to run, so as to provide driving force to the gear assembly 110.

[0065] The transmission idler wheel 112 is meshed with the driving gear 111 . When the driving gear 111 rotates, the transmission idler wheel 112 is driven to rotate, so as to transmit driving force to the gear assembly 110 .

[0066] In a normal state, the propulsion gear part 113 is abutted by the disengagement structure 200, and the abutment force causes the propulsion gear part 113 to mesh with the transmission idler wheel 112, and the transmission idler wheel 112 drives the transmission assembly 120 to move from the original position to the operation direction along the transmission slot 420, thereby helping to achieve the medical operation of the medical device. In an abnormal state, the propulsion gear part 113 is disengaged from the disengagement structure 200, and the abutment force disappears. Since the propulsion gear part 113 is subjected to the overload force from the transmission assembly 120 at this time, it will move after the abutment force disappears, and immediately and automatically get rid of the cooperation with the transmission assembly 120, and finally release the overload force, so as to prevent the transmission structure 100 from being damaged due to the overload force, or being difficult to withdraw and disengage. In this way, the withdrawal structure 300 can effectively withdraw the transmission assembly 120.

[0067] Figure 1A-1B , Figure 3-Figure 5 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the propulsion gear unit 113 includes a gear shaft 113a, a propulsion gear 113b and a transmission gear 113c. The gear shaft 113a penetrates the propulsion gear unit 113 along the rotation axis of the propulsion gear unit 113 to provide rotation support; the propulsion gear 113b is arranged on the gear shaft 113a and meshed with the transmission assembly 120; the transmission gear 113c is arranged on the gear shaft 113a in parallel with the propulsion gear 113b and spaced apart, and meshed with the transmission idler 112.

[0068] The gear shaft 113a is movably arranged at both ends of the gear shaft 113a on the support seat 410 along a direction perpendicular to the extension direction of the transmission groove 420. The gear shaft 113a can provide rotation support for the propulsion gear part 113. Under normal conditions, when the propulsion gear part 113 is subjected to the abutment force of the disengagement structure 200, the propulsion gear 113b is meshed with the transmission assembly 120, and the transmission gear 113c is meshed with the transmission idler gear; under abnormal conditions, the overload force between the propulsion gear 113b and the transmission assembly 120 will cause the propulsion gear 113b to apply pressure to the disengagement structure, so that the meshing between the disengagement structure 200 and the propulsion gear 113b is disengaged, whereby the propulsion gear part 113, due to still being subjected to the overload force, will immediately produce a slight movement and disengage from the transmission assembly 120. Among them, the specific operation process of the relevant gear assembly can be obtained by those skilled in the art based on the above description and relevant drawings of the embodiments of the present disclosure, and will not be repeated here.

[0069] Figure 1A-1B , Figure 3-Figure 5 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the propulsion gear part 113 further includes a sleeve 113d and a bearing 113e. The sleeve 113d is sleeved on the gear shaft 113a and arranged between the propulsion gear 113b and the transmission gear 113c; the bearing 113e is sleeved on the end of the gear shaft 113a.

[0070] The shaft sleeve 113d is arranged between the mutually parallel propulsion gear 113b and the transmission gear 113c to strengthen the rotation support between the two, so as to make the rotation of the two more stable, and to protect the gear shaft 113a from being easily damaged or bent due to the overload force of the transmission assembly 120. At the same time, the shaft sleeve 113d can abut against the disengagement structure 200 to prevent the abutment between the propulsion gear part 113 and the disengagement structure 200 from affecting the rotation of the propulsion gear 113b and the transmission gear 113c. At the same time, the abutment between the shaft sleeve 113d and the disengagement structure 200 in a normal state can make the abutment force on the propulsion gear part 113 of the gear assembly 110 more evenly dispersed, and avoid long-term abutment from affecting the movement or deformation of the propulsion gear 113.

[0071] Bearing 113e is sleeved on both ends of the gear shaft 113a (that is, a gear shaft 113a has at least two bearings 113e). Under normal conditions, bearing 113e is used to provide rotation protection for both ends of the gear shaft 113a to prevent the rotation from getting stuck. In addition, under abnormal conditions, when the entire propulsion gear part 113 moves slightly, bearing 113e can ensure that the upper and lower forces of the propulsion gear part 113 are more uniform, avoiding the situation where the upper end of the gear shaft 113a moves, but the lower end does not move or moves very little, causing the entire propulsion gear part 113 to tilt, reducing friction during rotation, and at the same time, under abnormal conditions, preventing the friction between the bearing 113e and the shaft groove 402 from increasing when sliding along the shaft groove 402 due to overload, providing rotation protection, and preventing rotation from being stopped.

[0072] like Figure 1A and Figure 2 As shown, according to an embodiment of the present disclosure, the support seat 410 includes an axial groove 402, which is arranged perpendicular to the moving direction of the transmission assembly 120 and passes through the upper surface of the support seat 410; wherein the bearing 113e of the propulsion gear portion 113 is arranged in the axial groove 402, and in a normal state, is located at one end of the axial groove 402 close to the transmission assembly 120, and after disengagement is achieved, is located at the end of the axial groove 402 away from the transmission assembly 120.

[0073] The shaft groove 402 is a strip groove, and the shapes of both ends of the groove are circular and match the outer shape of the bearing 113 e. The bearing 113 e is sleeved on the end of the gear shaft 113 a and is limited in the support seat by the shaft groove 402. Under normal conditions, the sleeve 113d of the propulsion gear portion 113 is subjected to the abutment force of the disengagement structure 200, so that the end bearing 113e of the gear shaft 113a is maintained on the inner side close to the shaft groove 402, that is, close to one end of the transmission assembly 120; under abnormal conditions, the sleeve 113d of the propulsion gear portion 113 of the gear assembly 100 overcomes the abutment force applied by the disengagement structure 200 because the propulsion gear of the propulsion gear portion 113 receives a component force from the inside to the outside along the shaft groove 402, so that the abutment between the two is disengaged. The propulsion gear portion 113 continues to be subjected to the overload force of the transmission assembly 120, which generates a component force along the shaft groove 402, and continues to move along the shaft groove 402, and is finally located on the outer side of the shaft groove 402, that is, away from one end of the transmission assembly 120. The corresponding moving direction is as follows Figure 1A Double-headed arrow shown.

[0074] Among them, those skilled in the art should understand that another shaft groove is correspondingly provided on the lower surface of the accommodating space 401 corresponding to the shaft groove 402 for setting the bearing of the other end of the gear shaft 113a, which is not elaborated here.

[0075] like Figure 1A-Figure 3 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the transmission assembly 120 includes a first tooth surface 121 and a second tooth surface 122. The first tooth surface 121 is disposed on the transmission assembly 120 and meshes with the gear assembly 110; the second tooth surface 122 is disposed on the transmission assembly 120 corresponding to the first tooth surface 121 and corresponds to the retraction structure 300.

[0076] The transmission assembly 120 may be a bar-shaped or columnar structure, and a tooth surface may be provided on its side surface, and the first tooth surface 121 and the second tooth surface 122 may be provided on two adjacent side surfaces. In a normal state, the first tooth surface 121 is used to mesh with the propulsion gear 113b of the propulsion gear portion 113 of the gear assembly 110, and is used to drive the transmission assembly 120 to perform normal transmission and move along the transmission groove 420 after receiving the rotational force of the propulsion gear 113b; the second tooth surface 122 is used to be provided corresponding to the withdrawal structure 300, and in an abnormal state, the meshing between the first tooth surface 121 and the propulsion gear 113b is disengaged, and the withdrawal structure 300 may contact and bear force with the second tooth surface 122, and after receiving the force of the withdrawal structure 300, the second tooth surface 122 may withdraw the transmission assembly 120 along the transmission groove 420 in the opposite direction of the original normal transmission direction.

[0077] In addition, the transmission assembly 120 also has a transmission end 123, which is connected to an operating component of the medical device, for example, connected to a firing execution component of an electric stapler.

[0078] like Figure 1A-Figure 5 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the disengagement structure 200 includes a locking portion 210 and a twisting portion 220. The locking portion 210 is disposed on one side of the gear assembly 110, and in a normal state, one end of the locking portion 210 abuts against the outer wall surface of the shaft sleeve 113d of the gear assembly 110; the twisting portion 220 is disposed at the other end of the locking portion 210 to provide a twisting force for the locking portion 210 to abut against the outer wall surface of the shaft sleeve 113d.

[0079] The gear assembly 110 is arranged in the middle position of the accommodating space 401, and the disengaging structure 200 is arranged at the edge position of the accommodating space 401, half-enclosing the gear assembly 110. One end of the locking portion 210 abuts against the shaft sleeve 113d, so as to apply abutting force to the propulsion gear portion 113 under normal conditions, and limit the propulsion gear portion 113 to maintain a meshing state with the transmission assembly 120. The overall structure of the locking portion 210 can rotate relative to the position of the torsion portion 220. The torsion portion 220 itself can generate a torsion force to control the rotation of the locking portion 210, so that the locking portion 210 generates an abutting force against the shaft sleeve 113d when it contacts it.

[0080] like Figure 1A-Figure 5 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the locking portion 210 includes an abutting end 211, an extension arm 212 and a vertical seat 213. The abutting end 211 is arranged at the top of the locking portion 210, and abuts against the outer wall surface of the sleeve 113d in a normal state; the extension arm 212 is connected to the abutting end 211; the vertical seat 213 is vertically connected to the extension arm 212, and the locking portion 210 is connected to the torsion portion 220, so that the locking portion 210 is connected and arranged on the support seat 410 through the torsion portion 220.

[0081] The abutting end 211, the extension arm 212 and the vertical seat 213 can be integrally formed or fixedly connected to each other to form the locking portion 210. The abutting end 211 is connected to the extension arm 212, and the torsional force provided by the torsional portion 220 can be applied to the abutting end 211, so that the abutting end is subjected to the torsional force and approaches the gear assembly 110 and abuts against the outer wall surface of the sleeve 113d of the gear assembly 110.

[0082] The extension arm 212 is a plate-like structure, so that the locking portion 210 has a certain rotational force arm, and under normal conditions, the edge of the extension arm 212 close to the gear assembly 110 is located between the propulsion gear 113b and the transmission gear 113c, and is located on the upper part of the transmission idler gear 112, so as to further reduce the overall size and improve the integration, while avoiding structural interference with the gear assembly 110 to ensure the normal operation of the gear assembly 110.

[0083] The vertical seat 213 is another plate-like structure, which is perpendicularly arranged with the extension arm 212. Specifically, the end surface of the extension arm 212 close to the vertical seat 213 is arranged at the lower edge of the side wall of the plate-like structure of the vertical seat 213. In addition, the vertical seat 213 has a notch at one end close to the idler transmission wheel 112, and two through-shaft holes are respectively arranged on both sides of the notch, which are used to arrange the torsion part 220 to realize the rotation connection between the torsion part 220 and the locking part 210.

[0084] It should be noted that the transmission groove 420 of the transmission assembly 120 is arranged at a position between the vertical seat 213 and the abutment end 211 of the disengagement structure 200, which is also the gap between the vertical seat 213 and the propulsion gear part 113, specifically located above the transmission gear 112 and the driving gear 111, so that the propulsion gear part 113 will not be restricted or blocked outside the shaft groove 402 during the disengagement process due to overload, and the integration of the entire structure is better guaranteed, further reducing the overall size of the device, making it more convenient and easy to operate.

[0085] like Figure 1A-Figure 5 as well as Figure 7A-7CAs shown, according to an embodiment of the present disclosure, the torsion portion 220 includes a torsion shaft 221 and a first torsion spring 222. The torsion shaft 221 is sleeved in at least two shaft holes of the vertical seat 213 of the locking portion 210, and the main body of the torsion shaft 221 is perpendicular to the upper surface of the support seat 410, and both ends are sleeved in the support seat 410; the first torsion spring 222 is sleeved on the torsion shaft 221 and is located between the at least two shaft holes of the vertical seat 213 of the locking portion 210.

[0086] The end of the torsion shaft 221 is sleeved in the shaft hole of the support seat 410, and the main body passes through the two through shaft holes of the vertical seat 213, so as to penetrate and sleeve the first torsion spring 222 together to form the torsion portion 220. The torsion portion 220 is used to rotatably fix the entire disengagement structure 200 on the support frame of the support structure 100, and with the help of the support seat 410, the first torsion spring 222 generates a torsion force, and acts on the abutting end 211 of the locking portion 210.

[0087] like Figure 3 , Figure 5 as well as Figure 7A-7C As shown, according to an embodiment of the present disclosure, the disengagement structure 200 further includes a stopper 230, and the stopper 230 is arranged on the support seat 410 in a connection area corresponding to the abutment end 211 and the extension arm 212; wherein, when the locking part 210 is in an abnormal state, due to the external force generated by the gear assembly 110, the torsion force of the torsion part 220 is overcome to rotate to the outside of the support seat 410 and the locking part 210 and the gear assembly 110 are disengaged, the stopper 230 limits the locking part 210, so that the gear assembly 110 is disengaged from the transmission assembly 120. The specific disengagement size can refer to the moving distance of the bearing 113e along the shaft groove 402.

[0088] The stopper 230 may be a spring ejector pin, and under normal conditions, its upper end is fixedly connected to the fixing hole of the support seat 410, and the movable ejector pin at the lower end abuts against the upper surface of the lock portion 210, during which the internal spring is compressed. At the same time, a stopper hole matching the movable ejector pin at the lower end of the stopper 230 is provided on the upper surface of the lock portion 210 corresponding to the connection area between the abutting end 211 and the extension arm 212.

[0089] Among them, under abnormal conditions, the gear assembly 110 is subjected to the overload force of the transmission assembly 120, generating a component force from the inside to the outside along the shaft groove 402, and pushing the propulsion gear part 113 of the gear assembly 110 to move outward along the shaft groove 402, and at the same time, the propulsion gear part 113 overcomes the abutting force applied by the abutting end 211 of the disengagement structure 200, and pushes the locking part 210 to rotate outward. When the limiting hole on the upper surface of the locking part 210 corresponds to the lower end movable ejector of the spring ejector as the limiting member 230, the internal spring elastic force of the lower end movable ejector causes the lower end ejector to release the limiting hole, thereby completing the limitation of the locking part 210 by the limiting member 230, so that the locking part 210 can no longer be subjected to the torsional force of the torsion part 220 and continue to rebound and abut against the propulsion gear part 113. At this time, the shaft sleeve 113d of the propulsion gear part 113 just breaks away from the abutment of the locking part 210, and the gear assembly 110 and the disengagement structure 200 are automatically disengaged by force. Then, the propulsion gear part 113 of the gear assembly 110 continues to move along the shaft groove 402, and finally disengages from the propulsion gear 113b and the first tooth surface 121 of the transmission assembly 120.

[0090] It should be particularly noted that the disengagement and retraction device of the embodiment of the present disclosure can automatically disengage immediately when the gear transmission mechanism of the gear assembly 110 and the transmission assembly 120 is overloaded to cut off the power input. No manual operation is required, which is quick and convenient. The emergency disengagement operation is completely automatically implemented by the mechanical structure, which is stable and reliable, and reduces the skill requirements for equipment operators.

[0091] like Figure 1A-Figure 3 as well as Figure 6-7C As shown, according to an embodiment of the present disclosure, the retraction structure 300 includes a handle 310, a rocker 320 and a pawl 330. The handle 310 is used for manual gripping and applying force to the retraction structure 300; the rocker 320 is rotatably connected to the handle 310 and fixed to the shaft frame 430; the fixed end of the pawl 330 is rotatably connected to the rocker 320 and is located between the transmission slot 420 and the rocker 320. In an abnormal state, the top end of the pawl 330 abuts against the transmission assembly 120.

[0092] The top of the handle 310 has an enlarged portion to facilitate the palm to grip and apply force. In a normal state, the handle 310 and the rocker 320 are rotationally connected, and the angle between the handle 310 and the rocker 320 is close to 0°, that is, the two are folded. This can further reduce the size of the device, improve the integration of the device, and save operating space. In an abnormal state, the handle 310 can be subjected to an external force applied by a person to overcome the torsion force of the connecting torsion spring between the handle 310 and the rocker 320, open the handle 310, and realize that the handle 310 and the rocker 320 are in line, that is, the force arm of the rocker 320 is extended, making the withdrawal operation more labor-saving.

[0093] The rocker 320 not only cooperates with the handle 310 to extend the force arm, but also can realize the connection between the handle 310 and the pawl 330 , and at the same time ensure that the retraction structure 300 for retraction is connected to the support frame of the support structure 100 .

[0094] The top end of the pawl 330 is a sharp protrusion. In an abnormal state, the sharp protrusion abuts against the side wall of one of the plurality of tooth grooves of the second tooth surface 122 of the transmission assembly 120 .

[0095] When the handle 310 is acted upon by human power and the rocker 320 is pressed downward, the top of the ratchet 330 abuts against a tooth groove of the second tooth surface 122, and applies a force opposite to the transmission force (which can be understood as a retraction force) to the tooth groove, pushing the transmission assembly 120 back by a distance of a tooth groove. When the handle 310 is acted upon by human power and the rocker 320 is lifted upward, the top of the ratchet 330 is disengaged from the abutment between the top of the ratchet 330 and the previous tooth groove of the second tooth surface 122, and when the handle 310 drives the rocker 320 to be pressed downward again, the top of the ratchet 330 abuts against a tooth groove adjacent to the previous tooth groove in the second tooth surface 122, and applies a retraction force opposite to the transmission force to the tooth groove, pushing the transmission assembly 120 back by a distance of a tooth groove again. Accordingly, by repeating the lifting and pressing actions of the handle 310, the transmission assembly 120 can be continuously retracted. During the retraction process, the first tooth surface 121 of the transmission assembly 120 has been disengaged from the propulsion gear 113 b of the propulsion gear portion 113 of the gear assembly 110 .

[0096] As the main retraction execution component of the retraction structure 300 of the embodiment of the present disclosure, the pawl 330 only provides a force in the retraction direction opposite to the transmission direction of the transmission assembly 120 while realizing the reciprocating motion of the rocker 320 and the handle 310, which can not only prevent the risks caused by pulling the rocker in the opposite direction, but also improve the retraction efficiency and save manpower.

[0097] like Figure 1A-Figure 3 as well as Figure 6-7C As shown, according to an embodiment of the present disclosure, the retraction structure 300 further includes a first transverse axis 340, a second transverse axis 350, and a second torsion spring 360. The first transverse axis 340 passes through the shaft frame 430, and the fixed end of the rocker 320 is sleeved on the first transverse axis 340; the second transverse axis 350 is located below the first transverse axis 340 and passes through the rocker 320, and the fixed end of the pawl 330 is sleeved on the second transverse axis 350; the second torsion spring 360 is sleeved on the second transverse axis 350, and is located at the connection position between the pawl 330 and the rocker 320.

[0098] The fixed end of the rocker 320 is penetrated by the first transverse axis 340 on the shaft frame 430, so that the rocker 320 can rotate relative to the shaft frame 430 with the first transverse axis 340 as the rotation axis. At the same time, the second transverse axis 350 penetrates the fixed end of the pawl 330 and the lower part of the fixed end of the rocker 320, so that the pawl 330 is restricted on the rocker 320 to reciprocate up and down, and the connection between the pawl 330 and the rocker 320 is realized. Therefore, when the rocker 320 reciprocates up and down, the second torsion spring 360 located in the middle of the shaft frame 430 and used to connect the fixed end of the pawl 330 and the fixed end of the rocker 330 can simultaneously drive the pawl to reciprocate up and down.

[0099] Therefore, when the rocker arm 320 is pressed down, an external force is applied to the pawl 330 by overcoming the torsional force of the second torsion spring 360, so that the pawl 330 applies a retraction force to the corresponding tooth groove of the second tooth surface 122 of the transmission assembly 120, and when the rocker arm 320 is lifted up, the pawl 330 is subjected to the torsional force of the second torsion spring 360, so that the pawl 330 is lifted up and disengaged from the second tooth surface 122.

[0100] It should be noted that the rocker 320 can also be lifted to realize the retraction force between the pawl 330 and the second tooth surface 122, and the rocker 320 is pressed down to remove the retraction force. The specific definition can be based on the second torsion spring 360 and its related design structure, which will not be described in detail here.

[0101] The retraction structure of the disclosed embodiment adopts a solution of a two-stage folding lever arm structure of the handle 310 and the rocker 320 in cooperation with the ratchet 330, which is folded in a normal working state to save space. Among them, the two-stage folding rocker can lengthen the operating lever arm, improve the retraction efficiency, significantly reduce the force required for operation, and significantly reduce the labor intensity of the operator.

[0102] like Figure 1B-3 , Figure 6 , Fig. 7A and Figure 7B As shown, according to an embodiment of the present disclosure, the retraction structure 300 further includes a push rod 370. The push rod 370 passes through the support seat 410 and is arranged perpendicular to the transmission slot 420, wherein the push rod 370 includes a cone head 371 and a column 372. The cone head 371 is arranged corresponding to the surface 301 of the rocker 320 which is perpendicular to the transmission slot 420 and close to the side of the disengagement structure 200; one end of the column 372 is connected to the cone head 371, and the other end abuts against the disengagement structure 200. In the retraction process, the cone head 371 is acted upon by the rocker 320, so that the push rod 370 moves perpendicular to the transmission slot 420 and abuts against the disengagement structure 200, so that the disengagement structure 200 and the gear assembly 110 remain in a disengaged state.

[0103] The push rod 370 is a columnar structure, which passes through the support seat 410 above the accommodating space 401 of the support seat 410, and the part of the push rod 370 exposed from the support seat 410 is located below the side close to the fixed end of the rocker arm 320. When the rocker arm 320 is pressed downward, the push rod 370 will be subjected to the downward pressure force of the rocker arm 320, and the downward pressure force is perpendicular to the component force of the transmission groove 420, which will push the push rod 370 to move along the direction of the component force.

[0104] The cone head 371 is exposed from the support seat 410, and when the rocker 320 is pressed down, the cone surface of the cone head 371 contacts the lower surface of the fixed end of the rocker 320, and receives the downward force of the rocker 320. At the same time, the cone head 371, by virtue of its inclined cone surface, causes the downward force of the rocker 320 to generate a component force perpendicular to the transmission slot 420.

[0105] The column 372 is a columnar structure, one end of which is connected to the cone head 371 and the other end is an enlarged end. The enlarged end of the column 372 abuts against the side wall of the vertical seat 213 of the locking portion 210 of the disengaging structure 200 facing the transmission groove 420. The column 372 and the cone head 371 can be integrally formed.

[0106] Specifically, under normal conditions, the cone head 371 of the push rod 370 is exposed below one side of the fixed end of the rocker 320, and the enlarged end of the column 372 of the push rod 370 is abutted by the vertical seat 213 that is subjected to the torsion force provided by the torsion portion 220, and the enlarged end is attached to the support seat 410 due to the force. In an abnormal state, when the retraction operation is performed, the rocker 320 of the retraction structure is driven by the handle 310 to be pressed down. During the pressing process, the fixed end of the rocker 320 near the lower surface 301 of the disengagement structure 200 contacts the cone head. The cone head 371 is pushed by the component force, so that the expanded part of the column 372 protrudes toward the disengagement structure 200 side and supports the vertical seat during the pressing process of the rocker 320, further preventing the following situation from occurring during the retraction process: the locking part 210 is not firmly limited by the limiting member 230, causing the locking part 210 of the disengagement structure 200 to rebound due to the torsion force of the torsion part 220, and continue to abut against the propulsion gear part 113 of the gear assembly 110, causing the gear assembly 110 to fail to disengage from the transmission assembly 120. That is, a double insurance design is provided for the stable retraction operation.

[0107] Therefore, with the help of the above-mentioned push rod, during the retraction operation, the rocker arm 320 can be forced to disengage the gear assembly 110 and the transmission assembly 120 to ensure that the power input is cut off during manual retraction. It can serve as an emergency automatic disengagement insurance and avoid secondary injury to the patient caused by the firing and retraction action during the retraction process.

[0108] Therefore, in combination with the embodiments of the present disclosure Figure 1A-Figure 7CThe disengagement and withdrawal device of the embodiment of the present disclosure has at least the following technical effects:

[0109] (1) The disengagement and withdrawal device is controlled by a purely mechanical structure, which has high stability and strong safety;

[0110] (2) The gear assembly 110 and the transmission assembly 120 of the disengagement and retraction device can realize emergency automatic disengagement by means of the overload force of the mechanism between the two in an abnormal state, and the response is timely, fast, and fully automatic;

[0111] (3) The emergency automatic disengagement process of the disengagement and withdrawal device does not require any operation by medical personnel, which can reduce the experience and technical requirements of medical personnel in equipment operation and reduce the labor intensity of emergency disengagement operation;

[0112] (4) When the disengagement and retraction device is manually retracted, the retraction rocker pushes the push rod to forcibly disconnect the power input, so that the transmission component cannot continue to operate regardless of electrical failure or human error, further improving operational safety;

[0113] (5) During the retraction operation of the disengaged retraction device, the two-stage foldable rocker lengthens the lever arm length of the retraction rocker, significantly reduces the force required for the operation, and reduces the labor intensity of the operator.

[0114] (6) The retraction actuator of the disengagement and retraction device is a ratchet, which only provides a force in the retraction direction of the transmission component while realizing the reciprocating motion of the rocker, thereby preventing the risk caused by pulling the rocker in the opposite direction and improving the retraction efficiency.

[0115] Another aspect of the present disclosure provides a medical device, which includes or applies the above-mentioned disengagement and withdrawal device. The medical device may be an electric stapler.

[0116] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings.

[0117] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is 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 in the protection scope of the present invention.

Claims

1. A disengagement and withdrawal device, applied to medical equipment, characterized in that: include: A transmission structure for controlling the operation of a medical device, wherein the transmission structure comprises: The gear assembly is used to provide transmission force for the transmission structure; A transmission assembly, arranged in cooperation with the gear assembly and connected to the medical device; A disengagement structure, which abuts against the gear assembly in a normal state, and realizes the disengagement between the gear assembly and the transmission assembly in an abnormal state; A retraction structure, disposed adjacent to the transmission structure, and used to control the transmission assembly to retract after the gear assembly is disengaged from the transmission assembly; Wherein, the gear assembly comprises: A driving gear, used to provide driving force for the gear assembly; A transmission idler gear, meshing with the driving gear; The propulsion gear part is meshed with the transmission idler wheel and the transmission assembly, and is used to be driven to rotate by the transmission idler wheel in a normal state to provide transmission force to the transmission assembly and push the transmission assembly to move relatively along the transmission groove; Wherein, the transmission assembly comprises: A first tooth surface is provided on the transmission assembly and meshes with the gear assembly; A second tooth surface, arranged on the transmission assembly corresponding to the first tooth surface, and arranged corresponding to the retraction structure; Wherein, the disengagement structure comprises: A locking portion, which is disposed on one side of the gear assembly, and in a normal state, one end of the locking portion abuts against an outer wall surface of a shaft sleeve of the gear assembly; A torsion portion, disposed at the other end of the locking portion, for providing a torsion force for the locking portion to abut against the outer wall surface of the sleeve; Wherein, the locking portion comprises: An abutment end, arranged at the top end of the locking portion, abutting against the outer wall surface of the sleeve in a normal state; an extension arm connected to the abutting end; A vertical seat is vertically connected to the extension arm, and connects the locking portion with the twisting portion, so that the locking portion is connected and arranged on the support seat through the twisting portion; Wherein, the torsion portion comprises: A torsion shaft is sleeved in at least two shaft holes of the vertical seat of the locking portion, and the main body of the torsion shaft is perpendicular to the upper surface of the support seat, and both ends of the torsion shaft are sleeved in the support seat; A first torsion spring, sleeved on the torsion shaft and located between at least two shaft holes of the vertical seat of the locking portion; Wherein, the disengagement structure further comprises: A limiting member, arranged on the support seat corresponding to the connection area between the abutting end and the extension arm; Wherein, when the locking part is in an abnormal state, due to the external force generated by the gear assembly, the locking part overcomes the torsion force of the torsion part and moves toward the outside of the support seat to achieve the disengagement of the locking part and the gear assembly, the limiting member limits the locking part, so that the gear assembly is disengaged from the transmission assembly; Wherein, the retracement structure includes: A handle, used for manual holding and applying force to the retraction structure; A rocker, rotatably connected to the handle and fixed to the shaft frame; A ratchet, a fixed end of which is rotationally connected to the rocker, is located between the transmission slot and the rocker. In an abnormal state, the top end of the ratchet abuts against the transmission assembly.

2. The device according to claim 1, characterized in that The device also includes: The supporting structure is connected to the transmission structure, the disengagement structure and the withdrawal structure, and plays a structural supporting role, wherein the supporting structure includes: A support seat having a hollow accommodation space inside, wherein the gear assembly and the disengagement structure are matched and arranged in the accommodation space; A transmission groove is recessed on the upper surface of the support seat and penetrates the support seat, and the transmission assembly is arranged in the transmission groove and moves relatively along the transmission groove; A shaft frame is arranged on the upper surface of the support seat along both sides of the transmission groove, and the retraction structure is arranged on the shaft frame corresponding to the transmission groove.

3. The device according to claim 1, characterized in that The propulsion gear unit comprises: A gear shaft, passing through the propulsion gear portion along the rotation axis of the propulsion gear portion, for providing rotation support; A propulsion gear, disposed on the gear shaft and meshing with the transmission assembly; The transmission gear is parallel to the propulsion gear and spaced apart on the gear shaft, and is meshed with the transmission idler gear.

4. The device according to claim 3, characterized in that The propulsion gear unit further comprises: A shaft sleeve, sleeved on the gear shaft and arranged between the propulsion gear and the transmission gear; The bearing is sleeved on the end of the gear shaft.

5. The device according to claim 4, characterized in that The support base comprises: An axis groove is arranged perpendicular to the moving direction of the transmission assembly and passes through the upper surface of the support seat; Wherein, the bearing of the propulsion gear part is arranged in the shaft groove, and in a normal state, is located at one end of the shaft groove close to the transmission component, and after disengagement, is located at one end of the shaft groove away from the transmission component.

6. The device according to claim 1, characterized in that The retracement structure also includes: A first transverse axis, through which the axis frame is passed, and a fixed end of the rocker arm is sleeved on the first transverse axis; A second horizontal axis is located below the first horizontal axis and penetrates the rocker, and the fixed end of the pawl is sleeved on the second horizontal axis; The second torsion spring is sleeved on the second transverse axis and is located at the connection position between the pawl and the rocker.

7. The device according to claim 1, characterized in that The retracement structure also includes: A push rod passes through the support seat and is arranged perpendicular to the transmission groove, wherein the push rod includes: A cone head is arranged corresponding to a surface of the rocker perpendicular to the transmission groove and close to one side of the disengagement structure; A column, one end of which is connected to the cone head and the other end of which abuts against the disengagement structure; Wherein, during the retraction process, the cone head is acted upon by the rocker, so that the push rod moves perpendicular to the transmission groove and supports the disengagement structure, so that the disengagement structure and the gear assembly remain in a disengaged state.

8. A medical device, characterized in that: It comprises a disengagement and withdrawal device as claimed in any one of claims 1 to 7.

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