Retraction mechanism and cutting and stapling device

Abstract

This invention relates to a retraction mechanism and a cutting and sewing device. The retraction mechanism includes a bracket, a transmission component, a drive assembly, and a retraction assembly. The transmission component is slidably connected to the bracket and includes multiple transmission teeth. The drive assembly includes a driven gear and a motor. When the driven gear is in the engaged position, it meshes with the multiple transmission teeth. When the driven gear is in the disengaged position, it disengages from the multiple transmission teeth. The retraction assembly includes a connector and a retraction gear. The connector is rotatably connected to the bracket, with one end rotatably connected to the retraction gear and the other end rotatably connected to the driven gear. The connection point between the connector and the bracket is located between the retraction gear and the driven gear. When the retraction gear is controlled to switch from a first position to a second position via the connector, the driven gear switches from the engaged position to the disengaged position, and the retraction gear meshes with the multiple transmission teeth. By converting the rotation of the retraction gear into the movement of the transmission component, the retraction of the transmission component is achieved, thus improving the retraction efficiency of the transmission component.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a retraction mechanism and a cutting and suturing device. Background Technology

[0002] Electric staplers combine a DC motor, circuit board, and mechanical components to achieve all the functions of a laparoscopic stapler under electric control. Their simple operation and core advantage of reducing accidental tissue damage caused by human error during surgery have been widely recognized in clinical practice. However, the motor, as the primary drive unit, is prone to malfunctions, including those occurring under special circumstances, which can lead to the jaws failing to open and release the gripped tissue. When a malfunction occurs during use, the stapler jaws may be clamping tissue. In this case, the transmission mechanism connected to the jaws needs to be driven to retract, causing the blade to retract and the jaws to open and release the tissue. However, most current electric staplers use an eccentric pusher to drive the transmission mechanism back, resulting in low retraction efficiency and affecting the speed and effectiveness of forced retraction during surgery. Summary of the Invention

[0003] Therefore, it is necessary to provide a retraction mechanism to address the technical problem that most current electric staplers use eccentric push rods to drive the transmission components back, resulting in low retraction efficiency and affecting the speed and effectiveness of forced retraction operations during surgery.

[0004] A rollback mechanism, comprising:

[0005] support

[0006] A transmission component is slidably connected to the bracket, and the transmission component includes multiple transmission teeth;

[0007] A drive assembly includes a driven gear and a motor; the driven gear has an engaged position and a disengaged position; when the driven gear is in the engaged position, it engages with the plurality of transmission teeth and is drively connected to the motor; when the driven gear is in the disengaged position, it disengages from the plurality of transmission teeth and is disengaged from the motor; and,

[0008] A retraction assembly includes a connector and a retraction gear. The connector is rotatably connected to the bracket. One end of the connector is rotatably connected to the retraction gear, and the other end of the connector is rotatably connected to the driven gear. The connection point between the connector and the bracket is located between the retraction gear and the driven gear.

[0009] The retractable gear has a first position and a second position, and the retractable gear can be operably controlled to switch from the first position to the second position via the connecting member; when the retractable gear switches from the first position to the second position, the driven gear switches from the engaged position to the disengaged position, and the retractable gear meshes with the plurality of transmission teeth.

[0010] In one embodiment, the retraction assembly further includes a cam rotatably connected to the bracket and drively connected to the connector. The cam is configured to rotate about its own rotation center to drive the connector to rotate relative to the bracket, thereby switching the retraction gear from the first position to the second position.

[0011] In one embodiment, the cam's wheel wall abuts against the end of the connector near the driven gear, the cam being used to drive the connector to rotate, and the retraction assembly further including an elastic element, one end of which is connected to the bracket and the other end of which is connected to the side of the connector near the driven gear, the elastic element being used to apply a thrust toward the transmission member to the end of the connector near the driven gear.

[0012] In one embodiment, the wheel wall of the cam includes a drive section, the distance between the drive section and the rotation center of the cam gradually increasing in the direction of rotation of the cam relative to the support.

[0013] In one embodiment, the cam's wheel wall further includes a locking section connected to one end of the drive section away from the rotation center of the cam. The locking section is adapted to the outer wall of the connector, and when the retraction gear is in the second position, the locking section is used to engage with the connector to lock the position of the connector.

[0014] In one embodiment, the cam has a first slot at its rotation center, the first slot being configured to engage with a first actuating element to cause the cam to rotate under the drive of the first actuating element.

[0015] In one embodiment, the retraction assembly further includes a rotating rod, the retraction gear being rotatably connected to the connector via the rotating rod, the rotating rod having a second slot configured to cooperate with a second operating element, such that the rotating rod drives the retraction gear to rotate under the drive of the second operating element.

[0016] In one embodiment, the drive assembly further includes a drive gear connected to the output end of the motor. The drive gear and the transmission member are located on the same side of the driven gear. When the driven gear is in the engagement position, the drive gear engages with the driven gear. When the driven gear is in the disengagement position, the drive gear disengages from the driven gear.

[0017] The present invention also provides a cutting and stitching device that can solve at least one of the above-mentioned technical problems.

[0018] A cutting and stitching device includes an end effector, a housing, and a retraction mechanism. The end effector includes a movable cutting member for cutting an object located in the end effector. The cutting member is tractively connected to the transmission member. The housing is connected to the support. The retraction mechanism is disposed within the housing. The housing has an operating opening for operating the retraction mechanism through the operating opening.

[0019] In one embodiment, the cutting and stitching device further includes a cover plate having a first state and a second state. When the cover plate is in the first state, it is used to cover the operating opening. When the cover plate is in the second state, it is used to cooperate with the retraction gear to drive the retraction gear to rotate.

[0020] Beneficial effects:

[0021] The retraction mechanism provided in this embodiment of the invention includes a bracket, a transmission component, a drive assembly, and a retraction assembly. The transmission component is slidably connected to the bracket and includes multiple transmission teeth. The drive assembly includes a driven gear and a motor. The driven gear has an engaged position and a disengaged position. When the driven gear is in the engaged position, it engages with the multiple transmission teeth and is connected to the motor. When the driven gear is in the disengaged position, it disengages from the multiple transmission teeth and is disengaged from the motor. The retraction assembly includes a connector and a retraction gear. The connector is rotatably connected to the bracket. One end of the connector is rotatably connected to the retraction gear, and the other end is rotatably connected to the driven gear. The connection between the connector and the bracket is located between the retraction gear and the driven gear. The retraction gear has a first position and a second position. The connector can operably control the retraction gear to switch from the first position to the second position. When the retraction gear switches from the first position to the second position, the driven gear switches from the engaged position to the disengaged position, and the retraction gear engages with the multiple transmission teeth. In this application, the connection between the connector and the bracket is located between the driven gear and the retracting gear. The connector rotates relative to the bracket, which can drive the retracting gear to switch from the first position to the second position, and drive the driven gear to switch from the meshing position to the disengaged position. That is, the driven gear is disengaged from multiple transmission teeth and from the motor, thereby disconnecting the driven gear from the transmission component. At the same time, the retracting gear meshes with multiple transmission teeth, which can convert the rotation of the retracting gear itself into the movement of the transmission component, causing the transmission component to retract. That is, for every revolution of the retracting gear, the transmission component can retract the circumference of the retracting gear, thereby greatly improving the retraction efficiency of the transmission component and achieving efficient retraction.

[0022] The present invention also provides a cutting and stitching device, including an end effector, a housing, and the aforementioned retraction mechanism. The end effector includes a movable cutting component for cutting an object located within the end effector, the cutting component being tractively connected to a transmission component. The housing is connected to a support, and the retraction mechanism is disposed within the housing. The housing has an operating opening for operating the retraction mechanism. This cutting and stitching device can achieve at least one of the aforementioned technical effects. Attached Figure Description

[0023] Figure 1 This is a first schematic diagram of a retraction mechanism provided in an embodiment of the present invention.

[0024] Figure 2 This is a second schematic diagram of a retraction mechanism provided in an embodiment of the present invention.

[0025] Figure 3 This is a partially exploded view of a retraction mechanism provided in an embodiment of the present invention.

[0026] Figure 4 Top view of a retraction mechanism provided in an embodiment of the present invention Figure 1 .

[0027] Figure 5 Top view of a retraction mechanism provided in an embodiment of the present invention Figure 2 .

[0028] Figure 6 This is a schematic diagram of a cam in a retraction mechanism provided in an embodiment of the present invention.

[0029] Figure 7 This is an exploded view of the retraction component in a retraction mechanism provided in an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of a cutting and stitching device provided in an embodiment of the present invention.

[0031] Figure 9 This is a schematic diagram of the cover plate in a cutting and sewing device according to an embodiment of the present invention.

[0032] Reference numerals: 100-Bracket; 200-Transmission component; 210-Transmission gear; 300-Drive assembly; 310-Driven gear; 320-Motor; 330-Drive gear; 400-Retracting assembly; 410-Connector; 411-First abutment plate; 412-Second abutment plate; 413-First end; 414-Second end; 415-Connecting rod; 416-Fixing rod; 420-Retracting gear; 430-Cam; 431-Drive section; 432-Locking section; 433-First slot; 434-Boss; 440-Elastic element; 450-Rotating rod; 451-Second slot; 510-Cover plate; 511-Unlocking element; 520-Housing; 600-End actuator. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 This is a first schematic diagram of a retraction mechanism provided in an embodiment of the present invention; Figure 2 This is a second schematic diagram of a retraction mechanism provided in an embodiment of the present invention; Figure 3 This is a partially exploded view of a retraction mechanism provided in an embodiment of the present invention; Figure 4 Top view of a retraction mechanism provided in an embodiment of the present invention Figure 1 ; Figure 5 Top view of a retraction mechanism provided in an embodiment of the present invention Figure 2 An embodiment of the present invention provides a retraction mechanism, including a bracket 100, a transmission member 200, a drive assembly 300, and a retraction assembly 400; the transmission member 200 is slidably connected to the bracket 100, and includes a plurality of transmission teeth 210; the drive assembly 300 includes a driven gear 310 and a motor 320, the driven gear 310 having an engaged position and a disengaged position; when the driven gear 310 is in the engaged position, the driven gear 310 is engaged with the plurality of transmission teeth 210 and is drively connected to the motor 320; when the driven gear 310 is in the disengaged position, the driven gear 310 is disengaged from the plurality of transmission teeth 210 and is disengaged from the motor 320; the retraction assembly 400 includes... The device includes a connector 410 and a retractable gear 420. The connector 410 is rotatably connected to the bracket 100. One end of the connector 410 is rotatably connected to the retractable gear 420, and the other end of the connector 410 is rotatably connected to the driven gear 310. The connection between the connector 410 and the bracket 100 is located between the retractable gear 420 and the driven gear 310. The retractable gear 420 has a first position and a second position. The connector 410 can be used to operably control the retractable gear 420 to switch from the first position to the second position. When the retractable gear 420 switches from the first position to the second position, the driven gear 310 switches from the engaged position to the disengaged position, and the retractable gear 420 meshes with a plurality of transmission teeth 210.

[0040] Specifically, in this application, the connection point between the connector 410 and the bracket 100 is located between the driven gear 310 and the retracting gear 420. The connector 410 rotates relative to the bracket 100, which can drive the retracting gear 420 to switch from the first position to the second position, and drive the driven gear 310 to switch from the meshing position to the disengaged position. That is, the driven gear 310 is disengaged from the multiple transmission teeth 210 and from the motor 320, thereby disconnecting the driven gear 310 from the transmission member 200. At the same time, the retracting gear 420 is connected to the multiple transmission teeth 210, which can convert the rotation of the retracting gear 420 itself into the movement of the transmission member 200, so that the transmission member 200 retracts. That is, for every one revolution of the retracting gear 420, the transmission member 200 can retract the circumference of the retracting gear 420, thereby greatly improving the retraction efficiency of the transmission member 200 and achieving efficient retraction.

[0041] When the driven gear 310 is in the engaged position, the retracting gear 420 is in the first position (as per the instruction manual). Figure 4 As shown, the driven gear 310 is connected to the motor 320 and meshes with multiple transmission teeth 210. At the same time, there is a gap between the retraction gear 420 and the transmission component 200. Thus, under the drive of the motor 320, the interference of the retraction component 400 on the transmission component 200 can be reduced during the process of the driven gear 310 driving the transmission component 200 forward. This allows the driven gear 310 to stably drive the transmission component 200 forward, improving the reliability of the retraction mechanism.

[0042] When the retracting gear 420 is in the second position, the driven gear 310 is in the disengaged position (as per the instruction manual). Figure 5 As shown, the driven gear 310 is disengaged from multiple transmission teeth 210 and from the motor 320. At the same time, the retraction gear 420 meshes with multiple transmission teeth 210 on the transmission component 200. This reduces the interference of the drive component 300 on the transmission component 200 during the retraction process of the retraction gear 420 driving the transmission component 200 to retract, thus enabling the retraction gear 420 to stably drive the transmission component 200 to retract and improving the reliability of the retraction mechanism.

[0043] See Figure 1 , Figure 4 , Figure 5 and Figure 6 , Figure 6 This is a schematic diagram of a cam in a retraction mechanism provided in one embodiment of the present invention. In one embodiment, the retraction assembly 400 further includes a cam 430, which is rotatably connected to the bracket 100 and drively connected to the connector 410. The cam 430 is configured to rotate about its own rotation center to drive the connector 410 to rotate relative to the bracket 100, so that the retraction gear 420 switches from a first position to a second position.

[0044] Specifically, the connecting member 410 is disposed on one side of the transmission member 200. As the cam 430 rotates around its own rotation center, it drives the connecting member 410 to rotate. Since the connection point between the connecting member 410 and the bracket 100 is located between the return gear 420 and the driven gear 310, the return gear 420 and the driven gear 310 move in opposite directions during the rotation of the connecting member 410. Initially, the driven gear 310 is in the engaged position, and the return gear 420 is in the first position. When a malfunction occurs, as the control cam 430 drives the connecting member 410 to rotate, the driven gear 310 moves away from the transmission member 200 to disengage from the multiple transmission teeth 210, thus moving to the disengaged position. The return gear 420 moves closer to the transmission member 200 and engages with the multiple transmission teeth 210, thus moving to the second position.

[0045] For ease of description, the end of the connector 410 that is connected to the retracting gear 420 is defined as the first end 413, and the end that is connected to the driven gear 310 is defined as the second end 414.

[0046] See Figure 1 and Figure 4 In one embodiment, the wheel wall of the cam 430 abuts against the end of the connector 410 near the driven gear 310. The cam 430 is used to push the connector 410 to rotate. The retraction assembly 400 also includes an elastic member 440. One end of the elastic member 440 is connected to the bracket 100, and the other end is connected to the side of the connector 410 near the driven gear 310. The elastic member 440 is used to apply a thrust toward the transmission member 200 to the end of the connector 410 near the driven gear 310.

[0047] Specifically, the wheel wall of cam 430 abuts against the second end 414, so that during the rotation of cam 430, the wheel wall of cam 430 can push the second end 414 to rotate, thereby realizing the switching of driven gear 310 between the engaged and disengaged positions. Meanwhile, elastic member 440 applies a thrust toward transmission member 200 to the second end 414, thereby ensuring stable engagement between driven gear 310 and multiple transmission teeth 210, improving the stability of the retraction mechanism. Preferably, elastic member 440 is a compression spring.

[0048] In another embodiment, the cam 430 has a groove with the thickness direction of the groove being the same as that of the cam 430. The connecting member 410 has a mating block, which is accommodated in the groove and abuts against the side wall of the groove. Thus, during the rotation of the cam 430, the connecting member 410 is driven by the side wall of the groove. It should be noted that when the driven gear 310 is in the meshing position and the retracting gear 420 is in the second position, the rotation of the cam 430 can be restricted by other structures, thereby ensuring that the driven gear 310 is stably meshed in the meshing position.

[0049] See Figure 1 , Figure 4 and Figure 6 In one embodiment, the wheel wall of the cam 430 includes a drive segment 431, and the distance between the drive segment 431 and the rotation center of the cam 430 gradually increases in the direction of rotation of the cam 430 relative to the support 100.

[0050] Specifically, the drive section 431 is arc-shaped. When the cam 430 rotates relative to the bracket 100, the distance between the drive section 431 and the rotation center of the cam 430 gradually increases, thereby driving the second end 414 to rotate away from the transmission member 200, so that the driven gear 310 moves from the meshing position to the disengaged position.

[0051] See Figure 1 , Figure 4 , Figure 5 and Figure 6 In one embodiment, the wheel wall of the cam 430 further includes a locking segment 432, which is connected to one end of the drive segment 431 away from the rotation center of the cam 430. The locking segment 432 is adapted to the outer wall of the connector 410. When the retraction gear 420 is in the second position, the locking segment 432 is used to engage with the connector 410 to lock the position of the connector 410.

[0052] Specifically, when the retraction gear 420 is in the second position, it engages with the connecting member 410 through the locking section 432, thereby reducing stress concentration and improving the service life of the cam 430.

[0053] See Figure 1 , Figure 4 , Figure 5 and Figure 6 In one embodiment, when the retraction gear 420 is in the second position, the torque on the cam 430 is zero.

[0054] Specifically, the resultant force of the reaction force applied to the cam 430 by the second end 414 passes through the rotation center of the cam 430, making the torque on the cam 430 zero. This causes the cam 430 to be in a self-locking state and unable to rotate, thus more stably restricting the rotation of the connecting member 410 and keeping the return gear 420 stably in the second position, thereby improving the stability of the return mechanism. Preferably, the locking section 432 is a plane, and the plane containing the locking section 432 is perpendicular to the direction of the thrust applied by the elastic member 440 to the connecting member 410.

[0055] It should be noted that in other embodiments, when the retraction gear 420 is in the second position, the rotation of the cam 430 can be restricted by other components to achieve locking of the cam 430.

[0056] See Figure 1 , Figure 2 and Figure 6 In one embodiment, a first slot 433 is provided at the rotation center of the cam 430, and the first slot 433 is configured to cooperate with a first operating member to cause the cam 430 to rotate under the drive of the first operating member.

[0057] Specifically, the first operating component can be a common tool such as a wrench, which is adapted to the common tool such as a wrench through the first slot 433. That is, the common tool such as a wrench can be inserted into the first slot 433, and the common tool such as a wrench can rotate to drive the cam 430 to rotate, thereby realizing the rotation of the connecting component 410.

[0058] See Figure 1 , Figure 3 and Figure 7 , Figure 7 This is an exploded view of a retraction component in a retraction mechanism according to an embodiment of the present invention. In one embodiment, the retraction component 400 further includes a rotating rod 450, which is connected to a retraction gear 420 and rotatably connected to a connecting member 410. The connecting member 410 is provided with a second slot 451, which is configured to cooperate with a second operating member so that the rotating rod 450 drives the retraction gear 420 to rotate under the drive of the second operating member.

[0059] Specifically, the rotating rod 450 passes through and is rotatably connected to the first end 413, and the retraction gear 420 is sleeved on the side of the rotating rod 450 that passes through the first end 413. The second operating member can be a common tool such as a wrench, which is adapted to the wrench or other common tool through the second slot 451. That is, the wrench or other common tool can be inserted into the second slot 451, so that the rotation of the wrench or other common tool drives the rotating rod 450 to drive the retraction gear 420 to rotate. Thus, when the retraction gear 420 is in the second position, the retraction gear 420 drives the transmission member 200 to move.

[0060] See Figure 1 and Figure 7 In one embodiment, the connector 410 includes a connecting rod 415 and a fixing rod 416. The connecting rod 415 is rotatably connected to the frame, and the fixing rod 416 is connected to the second end 414. The driven gear 310 is sleeved on the fixing rod 416 and rotatably connected to the fixing rod 416.

[0061] Furthermore, the cam 430 is disposed on the side of the connecting rod 415 away from the fixed rod 416. A first abutment plate 411 for abutting against the cam 430 is provided on the side of the connecting rod 415 near the cam 430, thereby reducing the interference of the cam 430 on the retraction gear 420 and improving the stability of the retraction mechanism. A second abutment plate 412 for abutting against the elastic member 440 is provided on the side of the connecting rod 415 away from the first abutment plate 411. The second abutment plate 412 extends towards the driven gear 310, thereby making the force exerted by the elastic member 440 on the connecting member 410 closer to the center position of the driven gear 310. This allows the retraction gear 420 to mesh more stably with the multiple transmission teeth 210 in the meshing position.

[0062] See Figure 3 , Figure 4 and Figure 5 In one embodiment, the drive assembly 300 further includes a drive gear 330 connected to the output end of the motor 320. The drive gear 330 and the transmission member 200 are located on the same side of the driven gear 310. When the driven gear 310 is in the meshing position, the drive gear 330 meshes with the driven gear 310. When the driven gear 310 is in the disengaged position, the drive gear 330 disengages from the driven gear 310.

[0063] In this embodiment, by setting the driving gear 330, the motor 320 can mesh with the driven gear 310 through the driving gear 330, so that the position of the motor 320 does not change, and the motor 320 is stably set on the frame, thereby improving the stability of the retraction mechanism.

[0064] See Figure 1 , Figure 2 and Figure 8 , Figure 8 This is a schematic diagram of a cutting and sewing device according to an embodiment of the present invention. Another embodiment of the present invention provides a cutting and sewing device, including an end actuator 600, a housing, and the aforementioned retraction mechanism. The end actuator 600 includes a movable cutting member for cutting an object located within the end actuator 600. The cutting member is tractively connected to a transmission member 200. The housing 520 is connected to a frame 100. The retraction mechanism is disposed within the housing 520, and the housing 520 has an operating opening for operating the retraction mechanism through the operating opening.

[0065] Specifically, the design within the housing 520 protects the retraction mechanism, preventing external components from scratching and affecting its operation, thus improving the reliability of the cutting and sewing device.

[0066] In this application, the connection between the connector 410 and the bracket 100 is located between the driven gear 310 and the retracting gear 420. The connector 410 rotates relative to the bracket 100, which can drive the retracting gear 420 to switch from the first position to the second position, and drive the driven gear 310 to switch from the meshing position to the disengaged position. That is, the driven gear 310 is disengaged from the multiple transmission teeth 210 and from the motor 320, thereby disconnecting the driven gear 310 from the transmission member 200. At the same time, the retracting gear 420 is connected to the multiple transmission teeth 210, thereby converting the rotation of the retracting gear 420 itself into the movement of the transmission member 200, so that the transmission member 200 retracts. That is, for every one revolution of the retracting gear 420, the transmission member 200 can retract the circumference of the retracting gear 420, thereby greatly improving the retraction efficiency of the transmission member 200, achieving efficient retraction, and improving the adaptability of the cutting and sewing device.

[0067] See Figure 2 and Figure 9 , Figure 9 This is a schematic diagram of a cover plate in a cutting and stitching device according to an embodiment of the present invention. In one embodiment, the cutting and stitching device further includes a cover plate 510, which has a first state and a second state. When the cover plate 510 is in the first state, it is used to cover the operating opening. When the cover plate 510 is in the second state, it is used to cooperate with the retraction gear 420 to drive the retraction gear 420 to rotate.

[0068] Specifically, the cover plate 510 is detachably connected to the housing 520. When the cover plate 510 is connected to the housing 520, in the first state, the cover plate 510 covers the operating opening to prevent the retraction mechanism from being exposed and to reduce interference from other components. When the cover plate 510 is separated from the housing 520, the cover plate 510 can engage with the retraction gear 420. When the retraction gear 420 is in the second position, the cover plate 510 can be manually rotated to drive the retraction gear 420 to rotate, thereby driving the transmission component 200 to move.

[0069] Furthermore, the end of the cover plate 510 is provided with an unlocking member 511 adapted to the first slot 433. When it is necessary to control the retraction of the transmission member 200, the cover plate 510 can be removed, and the unlocking member 511 on one side of the cover plate 510 can be inserted into the first slot 433 to control the rotation of the cover plate 510, thereby rotating the cam 430 and causing the retraction gear 420 to switch to the second position, thus facilitating the retraction of the transmission member 200. Compared with using a wrench or other operating tools to control the rotation of the cam 430, this improves the efficiency of the retraction of the transmission member 200. The cover plate 510 is larger than the unlocking member 511, which also saves effort. The first slot 433 can be a flat slot or an internal hexagonal slot. In other embodiments, the cam 430 can also be controlled by a wrench or other operating tools.

[0070] Furthermore, the housing 520 is provided with a first clearance hole corresponding to the first slot 433, the cam 430 is provided with a boss 434, the boss 434 is inserted into the first clearance hole, the side of the boss 434 away from the cam 430 is flush with the housing 520, and the first slot 433 is provided on the boss 434.

[0071] Additionally, the unlocking element 511 on one side of the cover plate 510 is also compatible with the second slot 451. When the unlocking element 511 is inserted into the first slot 433, the cover plate 510 can be manually rotated, causing the cover plate 510 to drive the cam 430 to rotate. This allows the connecting member 410 to move the retraction gear 420 to the second position. Then, the cover plate 510 is removed, the unlocking element 511 on the cover plate 510 is inserted into the second slot 451, and the cover plate 510 is manually rotated again to drive the retraction gear 420 to rotate, thus retracting the transmission member 200. Compared to using a wrench or other operating devices to control the rotation of the retraction gear 420, this improves the efficiency of the retraction of the transmission member 200. The second slot 451 can be a flathead slot or an internal hexagonal slot. In other embodiments, the rotating rod 450 can also be controlled by a wrench or other operating devices.

[0072] Furthermore, the housing 520 is provided with a second clearance hole corresponding to the second slot 451, and the rotating rod 450 is partially accommodated in the second clearance hole, with the side away from the retraction gear 420 being flush with the housing 520.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A retraction mechanism, characterized in that, The rollback mechanism includes: Support (100), A transmission component (200) is slidably connected to the bracket (100), and the transmission component (200) includes a plurality of transmission teeth (210); A drive assembly (300) includes a driven gear (310) and a motor (320); the driven gear (310) has an engaged position and a disengaged position; when the driven gear (310) is in the engaged position, the driven gear (310) meshes with the plurality of transmission teeth (210) and is drively connected to the motor (320); when the driven gear (310) is in the disengaged position, the driven gear (310) is disengaged from the plurality of transmission teeth (210) and disengaged from the motor (320); and, A retraction assembly (400) includes a connector (410) and a retraction gear (420). The connector (410) is rotatably connected to the bracket (100). One end of the connector (410) is rotatably connected to the retraction gear (420), and the other end of the connector (410) is rotatably connected to the driven gear (310). The connection between the connector (410) and the bracket (100) is located between the retraction gear (420) and the driven gear (310). The retractable gear (420) has a first position and a second position. The retractable gear (420) can be operably controlled to switch from the first position to the second position via the connector (410). When the retractable gear (420) switches from the first position to the second position, the driven gear (310) switches from the engaged position to the disengaged position, and the retractable gear (420) meshes with the plurality of transmission teeth (210).

2. The retraction mechanism according to claim 1, characterized in that, The retraction assembly (400) further includes a cam (430) rotatably connected to the bracket (100) and drively connected to the connector (410). The cam (430) is configured to rotate about its own rotation center to drive the connector (410) to rotate relative to the bracket (100) so that the retraction gear (420) switches from the first position to the second position.

3. The retraction mechanism according to claim 2, characterized in that, The cam (430) has its wheel wall abutting against the end of the connector (410) near the driven gear (310). The cam (430) is used to push the connector (410) to rotate. The retraction assembly (400) also includes an elastic element (440). One end of the elastic element (440) is connected to the bracket (100), and the other end is connected to the side of the connector (410) near the driven gear (310). The elastic element (440) is used to apply a thrust toward the transmission member (200) to the end of the connector (410) near the driven gear (310).

4. The retraction mechanism according to claim 3, characterized in that, The wheel wall of the cam (430) includes a drive section (431) in which the distance between the drive section (431) and the rotation center of the cam (430) gradually increases in the direction of rotation of the cam (430) relative to the bracket (100).

5. The retraction mechanism according to claim 4, characterized in that, The cam (430) also includes a locking section (432) on its wheel wall. The locking section (432) is connected to one end of the drive section (431) away from the rotation center of the cam (430). The locking section (432) is adapted to the outer wall of the connector (410). When the retraction gear (420) is in the second position, the locking section (432) is used to engage with the connector (410) to lock the position of the connector (410).

6. The retraction mechanism according to claim 2, characterized in that, The cam (430) has a first slot (433) at its rotation center, and the first slot (433) is configured to cooperate with a first operating member to cause the cam (430) to rotate under the drive of the first operating member.

7. The retraction mechanism according to any one of claims 1-6, characterized in that, The retraction assembly (400) further includes a rotating rod (450), and the retraction gear (420) is rotatably connected to the connector (410) via the rotating rod (450). The rotating rod (450) is provided with a second slot (451), which is configured to cooperate with a second operating member so that the rotating rod (450) drives the retraction gear (420) to rotate under the drive of the second operating member.

8. The retraction mechanism according to any one of claims 1-6, characterized in that, The drive assembly (300) further includes a drive gear (330), which is connected to the output end of the motor (320). The drive gear (330) and the transmission member (200) are located on the same side of the driven gear (310). When the driven gear (310) is in the meshing position, the drive gear (330) meshes with the driven gear (310). When the driven gear (310) is in the disengaged position, the drive gear (330) disengages from the driven gear (310).

9. A cutting and sewing device, characterized in that, The device includes an end effector (600), a housing (520), and a retraction mechanism as described in any one of claims 1-8. The end effector (600) includes a movable cutting member for cutting an object located in the end effector (600), the cutting member being tractively connected to the transmission member (200). The housing (520) is connected to the bracket (100). The retraction mechanism is disposed within the housing (520), and the housing (520) has an operating opening for operating the retraction mechanism through the operating opening.

10. The cutting and stitching device according to claim 9, characterized in that, The cutting and stitching device also includes a cover plate (510), which has a first state and a second state. When the cover plate (510) is in the first state, it is used to cover the operating opening. When the cover plate (510) is in the second state, it is used to cooperate with the retraction gear (420) to drive the retraction gear (420) to rotate.

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