Closing assembly and electric anastomat

Abstract

The invention provides a closing assembly and an electric anastomat. The closing assembly comprises a percussion rod, a handle, an electric driving assembly and a sensing element, and the far end of the percussion rod is connected to a nail bin assembly; when the handle moves from an initial position to a first position, the triggering rod is driven to move towards the far end, so that a jaw of the nail bin assembly is closed; when the sensing element detects that the handle moves to a second position, the sensing element sends a first starting signal to the electric driving assembly, and the electric driving assembly responds to the first starting signal to drive the percussion rod to move towards the near end so as to open a jaw of the nail bin assembly. By the adoption of the staple cartridge assembly, an operator can manually close the jaw of the staple cartridge assembly to accurately sense force feedback when the jaw is closed, and the jaw can be electrically opened.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a closure assembly and an electric stapler. Background Art

[0002] In the prior art, an electric stapler includes a stapler body and a stapler assembly connected to the distal end of the stapler body, wherein a closing and firing assembly is provided in the stapler body to drive the stapler assembly to close and fire. The electrification of the stapler is beneficial to reduce the pulling of tissues during operation and improve the quality of staplers, and is therefore suitable for wide promotion and application.

[0003] However, the jaw closure of the existing nail magazine assembly is achieved by motor drive. The doctor cannot sense the feedback force when the jaws of the nail magazine assembly are closed, and also cannot sense the compression state of the tissue when the jaws of the nail magazine assembly are closed, which may cause excessive compression of the tissue or insufficient clamping force. The doctor is also unable to select a suitable nail magazine assembly based on the feedback force. Summary of the invention

[0004] In view of the problems in the prior art, the purpose of the present application is to provide a closing assembly and an electric stapler, wherein an operator can manually close the jaws of the staple cartridge assembly to accurately sense the force feedback when the jaws are closed, and can open the jaws electrically.

[0005] The embodiment of the present application provides a closing assembly for driving the jaws of a stapler assembly of an electric stapler to close, the closing assembly comprising a firing rod, a handle, an electric driving assembly and a sensing element, the distal end of the firing rod being connected to the stapler assembly;

[0006] Wherein, when the handle moves from the initial position to the first position, the firing rod is driven to move in the distal direction to close the jaws of the nail magazine assembly;

[0007] When the sensing element detects that the handle moves to the second position, it sends a first starting signal to the electric drive assembly. In response to the first starting signal, the electric drive assembly drives the firing rod to move in the proximal direction to open the jaws of the nail magazine assembly.

[0008] In some embodiments, the handle is configured to rotate from the initial position along a first direction to the first position, and to rotate from the initial position along a second direction to the second position when driven, the first direction and the second direction being opposite.

[0009] In some embodiments, a mating piece is fixedly provided on the firing rod, and a driving piece is provided on the side of the handle facing the firing rod. When the handle rotates from the initial position to the first position, the driving piece rotates with the handle, and the driving piece resists against the mating piece and drives the firing rod to move in the distal direction through the mating piece.

[0010] In some embodiments, the electric drive assembly includes a motor, a control unit and an actuator rod. The control unit is configured to control the motor to drive the actuator rod to move in a proximal direction in response to the first start signal, and to control the motor to drive the actuator rod to move in a distal direction in response to the second start signal. The actuator rod is connected to the firing rod.

[0011] In some embodiments, the firing rod is provided with a first connecting portion, and the actuating rod is provided with a second connecting portion, and the first connecting portion and the second connecting portion form a connection that can slide relative to each other in the axial direction; wherein, when the handle moves from the initial position to the first position, the firing rod moves in a distal direction relative to the actuating rod.

[0012] In some embodiments, one of the first connection portion and the second connection portion is a boss, and the other is a slide groove. The boss is located inside the slide groove and can move along the axial direction relative to the slide groove.

[0013] In some embodiments, a first stop portion and a second stop portion are provided inside the slide groove; when the boss abuts against the first stop portion, the firing rod is blocked from moving in the proximal direction relative to the actuating rod, and when the boss abuts against the second stop portion, the firing rod is blocked from moving in the distal direction relative to the actuating rod.

[0014] In some embodiments, the boss is disposed at the proximal end of the firing rod, the slide groove is disposed at the distal end of the actuating rod, and the first stop portion is located at the proximal end of the second stop portion, or,

[0015] The boss is arranged at the distal end of the actuating rod, the slide groove is arranged at the proximal end of the firing rod, and the first stop portion is located at the distal end of the second stop portion.

[0016] In some embodiments, the actuating rod includes a third position and a fourth position located at the proximal end of the stapler, the fourth position is located at the proximal side of the third position, the firing rod includes a fifth position and a sixth position located at the proximal end of the stapler, the sixth position is located at the distal side of the fifth position;

[0017] In the waiting-to-close state, the actuating rod is located at the third position, the firing rod is located at the fifth position, and the boss and the second stop portion have an axial distance, so that the firing rod can be driven to move in the distal direction relative to the actuating rod to the sixth position;

[0018] When the control unit receives the first start signal, the motor first drives the actuating rod to move in the proximal direction to the third position, and the actuating rod drives the firing rod to move in the proximal direction to the sixth position. When the motor continues to drive the actuating rod to move to the fourth position, the actuating rod drives the firing rod to move to the fifth position, and then the motor drives the actuating rod to move in the distal direction and return from the fourth position to the third position, and the firing rod stays at the fifth position.

[0019] In some embodiments, the sensing element is a contact sensing element or a distance sensing element, and the handle is provided with a trigger portion opposite to the sensing element.

[0020] In some embodiments, the invention further comprises at least one elastic member configured to apply a biasing force to the handle to keep the handle in an initial position.

[0021] In some embodiments, when the stapler assembly is not installed on the stapler body of the stapler, the firing rod is in the fifth position, the actuating rod is in the fourth position, and the first connecting portion abuts against the second stopping portion to prevent the firing rod from moving in the distal direction relative to the actuating rod;

[0022] After the stapler assembly is installed on the stapler body, the control unit controls the motor to drive the actuating rod to move in the distal direction to the third position.

[0023] The present application also provides an electric stapler, comprising the above-mentioned closing assembly.

[0024] The closure assembly and electric stapler provided by the present application have the following advantages:

[0025] By adopting the present application, the operator can drive the firing rod to move in the distal direction through the handle to drive the jaws of the nail magazine assembly to close. The tissue feedback force received when the jaws are closed can be fed back to the handle through the firing rod. The operator can accurately sense the force feedback when the jaws are closed to avoid excessive squeezing of the tissue or insufficient clamping force, and can select a suitable nail magazine assembly according to the size of the feedback force. When the jaws need to be opened, the operator can use the coordination of the handle and the sensing element to make the electric drive assembly drive the firing rod to move in the proximal direction through the actuating rod, thereby electrically opening the jaws, which makes the operation more labor-saving and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0027] Figure 1 is a schematic structural diagram of a closing assembly according to an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of a closing assembly according to an embodiment of the present application, wherein the handle is located at an initial position, the actuating rod is located at a third position, and the firing rod is located at a fifth position;

[0029] Figure 3 is a schematic diagram of a first connecting portion abutting against a first stopping portion in an embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of a closing assembly according to an embodiment of the present application, wherein the handle is located in a first position, the actuating rod is located in a third position, and the firing rod is in a closed position (sixth position);

[0031] Figure 5 is a schematic diagram of a handle and a driving member of an embodiment of the present application;

[0032] Figure 6 is a schematic structural diagram of a closing assembly according to an embodiment of the present application, wherein the handle is located at the second position, the firing rod is located at the third position, and the firing rod is located at the sixth position;

[0033] Figure 7 is a schematic diagram of the first connecting portion and the second stop portion abutting against each other;

[0034] Figure 8 A schematic structural diagram of a closing assembly according to an embodiment of the present application, wherein the handle is located at the second position, the firing rod is located at the fourth position, and the firing rod is located at the fifth position.

[0035] Reference numerals:

[0036] 1 handle 51 motor

[0037] 11 first end of the handle 52 gear set

[0038] 12 Second end of the handle 53 Control unit

[0039] 13 Trigger part 6 Actuating rod

[0040] 2 Driving member 61 Second connecting portion

[0041] 3 Firing rod 611 First stopper

[0042] 31 first connecting portion 612 second stopping portion

[0043] 4 Mating part 7 Sensing element

[0044] 41 matching piece body 81 first torsion spring

[0045] 42 circlip 82 second torsion spring

[0046] 5 Electric components DETAILED DESCRIPTION

[0047] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the present application will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present application. Although "first" or "second" etc. are used in this specification to represent certain features, they are only used to represent the function, and are not used as a limitation on the number and importance of specific features.

[0048] The present application provides a closing assembly and an electric stapler including the closing assembly. The electric stapler includes a stapler body and a stapler magazine assembly connected to the distal end of the stapler body, the stapler magazine assembly includes a stapler, an anvil and a cutter, the proximal end of the stapler magazine and the proximal end of the anvil are rotatably connected, the jaws of the stapler magazine assembly are formed between the stapler magazine and the anvil, and the jaws can be driven to close and open by driving the position of the cutter relative to the stapler magazine and the anvil. The closing assembly is at least partially located inside the shell of the stapler body, and is used to drive the stapler magazine assembly of the electric stapler to close. The closing assembly includes a firing rod, a handle, an electric drive assembly and a sensing element. The distal end of the firing rod is connected to the cutter.

[0049] In the initial state, the distal end of the stapler body and the stapler assembly are stored separately. After the stapler assembly is installed to the distal end of the stapler body, the stapler enters a waiting-to-close state. In this waiting-to-close state, the cutter is located at the proximal end of the stapler, the jaws of the stapler assembly are open, and the handle is located at the initial position. When the operator operates the handle to move the handle from the initial position to the first position, the firing rod is driven to move a first distance in the distal direction to reach the closed position, and the firing rod drives the cutter to move a first distance in the distal direction to drive the jaws to close. Therefore, the tissue feedback force applied to the jaws when they are closed can be fed back to the handle through the firing rod, and the operator can accurately sense the force feedback when the jaws are closed to avoid excessive squeezing of the tissue or insufficient clamping force, and can select a suitable stapler assembly according to the magnitude of the feedback force.

[0050] After the jaws are closed, the firing rod can be driven by the electric drive assembly to continue to move in the distal direction for a second distance, so that the firing rod reaches the firing position. When the firing rod continues to drive the cutter to move in the distal direction, the staples in the staple magazine are pushed outward to suture the tissue, and the tissue is cut by the cutter to complete the firing of the stapler.

[0051] The process of electrically opening the jaws through the closing assembly includes: when the operator operates the handle to move the handle to the second position, the sensing element detects that the handle has moved to the second position and sends a first starting signal to the electric drive assembly, and the electric drive assembly drives the firing rod to move in the proximal direction in response to the first starting signal to open the jaws of the nail magazine assembly, thereby electrically opening the jaws, which makes the operation more labor-saving and convenient.

[0052] The structure and working principle of the closure assembly in a specific embodiment are described below in conjunction with the accompanying drawings. It is understandable that the following description is only an example and is not intended to limit the scope of protection of this application. In this application, the distal end and the proximal end are relative to the operator. The distal end is far from the operator, that is, close to the surgical site, and the proximal end is close to the operator, that is, far from the surgical site. The axial direction refers to the direction from the distal end to the proximal end or the proximal end to the distal end of the stapler. Figure 1 S1 direction and Figure 6 The S2 direction is axial, the S1 direction is distal, and the S2 direction is proximal.

[0053] In this embodiment, the initial position, the first position and the second position are for the handle 1. Figure 1The handle 1 has an initial position 10, a first position 1a and a second position 1b. The actuating rod 6 has a third position 6c and a fourth position 6d, both of which are located at the proximal end of the stapler, and the fourth position 6d is located at the proximal side of the third position 6c. The fifth position, the sixth position, the closed position and the firing position are for the firing rod 3. Figure 2 The fifth position of the firing rod 3 is shown in FIG. 1 , which is a position closest to the firing rod 3. When the firing rod 3 is in the fifth position, the jaws are open. The sixth position is a position distal to the fifth position, shown in FIG. Figure 6 In this embodiment, the sixth position is the closed position of the firing rod 3, that is, when the firing rod 3 moves to the sixth position, the jaws are closed. The firing position is located at the far end of the closed position, and is the farthest position of the firing rod 3. When the firing rod 3 moves to the firing position, the stapler completes the firing. The axial distance between the fifth position of the firing rod 3 and the closed position is the first distance, and the axial distance between the closed position of the firing rod 3 and the firing position is the second distance.

[0054] like Figure 1 and Figure 2 As shown, in one embodiment of the present application, the closing assembly includes a firing rod 3, a handle 1, an electric drive assembly 5 and a sensing element 7. The distal end of the firing rod 3 is connected to the cutter (not shown in the figure). A matching piece 4 is fixed on the firing rod 3, and the outer diameter of the matching piece 4 is larger than the outer diameter of the firing rod 3. Figure 3 As shown, the mating piece 4 includes a mating piece body 41 and a retaining spring 42, and the mating piece body 41 is fixed to the outer side of the firing rod 3 by the retaining spring 42. However, the present application is not limited thereto, and the mating piece 4 can also be fixed to the outer side of the firing rod 3 by welding, interference fit, threaded connection, bonding, etc. Alternatively, the mating piece 4 and the firing rod 3 can be an integrally formed component, and a shaft section with a larger outer diameter is formed on the firing rod 3 as the mating piece 4. A driving piece 2 is provided on the side of the handle 1 facing the firing rod 3, and the driving piece 2 is rotatably connected to the first end 11 of the handle 1. The second end 12 of the handle 1 is an operating end for the operator to hold. The handle 1 is rotatably connected to the shell of the stapler body (not shown in the figure). The handle 1 is configured to rotate from the initial position 10 along a first direction R1 to the first position 1a when driven, and from the initial position 10 along a second direction R2 (shown in Figure 6 ) is rotated to the second position 1b, the first direction and the second direction are opposite, the first direction is the counterclockwise direction in the figure, and the second direction is the clockwise direction in the figure.

[0055] The electric drive assembly 5 includes a motor 51, a control unit 53, a gear set 52 and an actuating rod 6, wherein the output shaft of the motor 51 is meshed with the tooth surface of the actuating rod 6 through the gear set 52. A firing start button may be provided on the housing of the stapler body, and when the operator presses the firing start button, the firing start button sends a first starting signal to the control unit 53. The control unit 53 is configured to control the motor 51 to rotate forward in response to the first starting signal, and when the motor 51 rotates forward, the actuating rod 6 is driven to move in the proximal direction, and to control the motor 51 to rotate reversely in response to the second starting signal, and when the motor 51 rotates reversely, the actuating rod 6 is driven to move in the distal direction, and the actuating rod 6 is connected to the firing rod 3.

[0056] Figure 2 The state of the closing assembly in the waiting state is shown. In the waiting state, the cutter is located at the proximal end of the nail magazine, the jaws of the nail magazine assembly are open, the handle 1 is located at the initial position, the firing rod 3 is located at the fifth position at the proximal end, and the actuating rod 6 is located at the third position. In order to prevent the firing rod 3 from being affected by the motor 51 and the actuating rod 6 during the movement from the fifth position to the closed position, the proximal end of the firing rod 3 and the distal end of the actuating rod 6 form a connection that can slide along the axial direction.

[0057] like Figure 3 As shown, when the firing rod 3 is in the fifth position and the actuating rod 6 is in the third position, the firing rod 3 can move toward the distal side relative to the actuating rod 6. Specifically, the proximal end of the firing rod 3 is provided with a first connecting portion 31, and the distal end of the actuating rod 6 is provided with a second connecting portion 61, the second connecting portion 61 includes a slide groove extending in the axial direction, the first connecting portion 31 is formed as a boss, and the first connecting portion 31 is at least partially located inside the slide groove. The proximal end of the slide groove is provided with a first stopper 611, and the distal end is provided with a second stopper 612. When the firing rod 3 is in the fifth position and the actuating rod 6 is in the third position, the firing rod 3 and the actuating rod 6 form a first connection state, at which the first connecting portion 31 abuts against the first stopper 611, and the first stopper 611 blocks the movement of the firing rod 3 toward the proximal direction, and because there is an axial distance between the first connecting portion 31 and the second stopper 612, the second connecting portion 61 does not block the movement of the firing rod 3 toward the distal direction. The axial distance between the first stop portion 611 and the second stop portion 612 is the distance range of the relative movement of the firing rod 3 and the actuating rod 6, which is at least greater than or equal to the above-mentioned first distance (i.e., the axial distance between the initial fifth position and the closed position of the firing rod 3).

[0058] exist Figure 2 and Figure 3 In the ready-to-close state shown, the operator holds the handle 1 and moves the handle 1 from the initial position to the first position along the first direction R1, and the closing assembly enters Figure 4 The state shown. During the rotation of the handle 1 from the initial position to the first position, the driving member 2 abuts against the matching member 4, and the matching member 4 drives the firing rod 3 to move from the fifth position to the distal direction by a first distance to reach the closed position. The firing rod 3 drives the cutter to move to the distal direction by a first distance to drive the jaws to close. Therefore, the tissue feedback force received when the jaws are closed can be fed back to the handle 1 through the firing rod 3, and the operator can accurately perceive the force feedback when the jaws are closed, avoid excessive squeezing of the tissue or insufficient clamping force, and select a suitable nail magazine assembly according to the magnitude of the feedback force. During the movement of the firing rod 3 from the fifth position to the distal direction to the closed position, the first connecting portion 31 slides from the proximal end of the slide groove to the distal end, and the actuating rod 6 remains unchanged at the third position. After the nail magazine assembly is closed, the first connecting portion 31 abuts against the second stop portion 612. At this time, the first connection portion 31 and the second connection portion 61 form a second connection state, and the second stop portion 612 blocks the first connection portion 31 from continuing to move in the distal direction. Therefore, before the operator can press the firing start button to start the motor 51 to rotate forward, the firing rod 3 will not continue to move in the distal direction, thus avoiding the axial movement of the firing rod 3 and causing misfiring. At this time, the operator can release the handle 1 to return the handle 1 to the initial position.

[0059] After the jaws are closed, the operator can press the firing start button to send a second starting signal to the control unit 53. The control unit 53 controls the motor 51 to rotate forward in response to the second starting signal. The motor 51 rotates forward to drive the actuating rod 6 to move in the distal direction. When the slide groove moves relative to the first connecting portion 31 until the first connecting portion 31 is again abutted against the first stop portion 611, the actuating rod 6 drives the firing rod 3 to move a second distance in the distal direction, so that the firing rod 3 reaches the firing position. The firing rod 3 continues to drive the cutter to move a second distance in the distal direction, pushes the staples in the staple magazine outward to suture the tissue, and cuts the tissue through the cutter to complete the firing of the stapler.

[0060] like Figure 4 and Figure 5As shown, the handle 1 is provided with a triggering portion 13 opposite to the sensing element 7. The sensing element 7 is a contact sensing element or a distance sensing element. For example, the sensing element 7 is a contact sensing element. When the operator pulls the handle 1 outwards to move the handle 1 to the second position along the second direction R2, the triggering portion 13 contacts the contact sensing element, and the contact sensing element sends a first start signal to the control unit 53. The contact sensing element 7 may be a button or a contact sensing sensor; or, the sensing element 7 is a distance sensing element. When the operator pulls the handle 1 outwards to move the handle 1 to the second position along the second direction R2, the distance sensing element detects that the distance to the triggering portion 13 reaches a preset range, and the distance sensing element sends a first start signal to the control unit. The distance sensing element may be a laser ranging sensor or other types of ranging sensors.

[0061] like Figure 5 As shown, a first torsion spring 81 is provided between the driving member 2 and the handle 1, which applies a biasing force to the driving member 2 to make it press against the fitting member 4 when the jaws are closed. The handle 1 also includes at least one elastic member, which is configured to apply a biasing force to the handle 1 to keep it in the initial position. The elastic member may include at least one second torsion spring 82 provided at the handle 1, or may be at least one tension spring or compression spring provided between the handle 1 and the housing. When the handle 1 is operated to move from the initial position to the first position and from the initial position to the second position, the elastic member provides the handle 1 with a biasing force toward the initial position, so that after the operator releases the handle 1, the handle 1 can automatically return to the initial position under the biasing force of the elastic member.

[0062] like Figure 6 As shown, when the jaws of the staple cartridge assembly need to be opened, the operator pulls the handle 1 outward to move the handle 1 to the second position along the second direction R2. After the sensing element 7 detects that the handle 1 has moved to the second position, it sends a first start signal to the control unit 53. The control unit 53 drives the motor 51 to reverse in response to the first start signal. The motor 51 reverses to drive the actuating rod 6 to move in the proximal direction, and the actuating rod 6 drives the firing rod 3 to move in the proximal direction to open the jaws of the staple cartridge assembly, thereby electrically opening the jaws. Compared with the manual opening of the jaws, which requires a large operating force, the operation of electrically opening the jaws is more labor-saving and convenient.

[0063] The motor 51 reversely drives the firing rod 3 to move toward the proximal direction to electrically open the jaws, which includes the following three processes:

[0064] (1) Figure 6 and Figure 7 As shown, the motor 51 reverses and drives the actuating rod 6 to move in the proximal direction. The actuating rod 6 first moves to the point where the first connecting portion 31 abuts against the second stop portion 612. Then, the actuating rod 6 can drive the firing rod 3 to move in the proximal direction. Figure 6 When the trigger rod 3 is in the third position shown in the figure, it moves from the firing position at the distal end to the sixth position, which corresponds to the above-mentioned closed position and is located at the distal end side of the fifth position. At this time, the nail head is still kept closed.

[0065] (2) Figure 8 As shown, the motor 51 is driven to reverse, so that the actuating rod 6 continues to move toward the proximal direction to the fourth position (corresponding to Figure 1 The fourth position 6d shown in the figure is located on the proximal side of the third position 6c), the first connecting portion 31 and the second stop portion 612 maintain abutment against each other, and the actuating rod 6 drives the firing rod 3 to move in the proximal direction to the initial fifth position, thereby opening the jaws of the nail magazine assembly.

[0066] (3) After the actuating rod 6 reaches the fourth position, the controller controls the motor 51 to rotate forward, driving the actuating rod 6 to move distally to the third position. During this process, since the firing rod 3 is slidably connected to the actuating rod, the firing rod 3 remains at the fifth position. At this time, the next handle closing action can be performed.

[0067] The above-mentioned process (1), process (2) and process (3) can be performed continuously, or process (1) can be performed first, and then the motor 51 is started to perform process (2) and process (3) after pausing. The operator can release the handle 1 after the motor 51 starts to reverse, or release the handle 1 after the jaws are fully opened. The handle 1 can automatically return to the initial position under the action of the elastic member.

[0068] After the jaws of the nail magazine assembly are opened, the actuating rod 6 can be kept in the fourth position, that is, the above process (3) can be omitted.

[0069] The closing assembly of this embodiment can also realize an empty staple cartridge safety function, that is, to ensure that when the staple cartridge assembly is not installed to the distal end of the stapler body, the firing rod 3 is kept from moving in the distal direction. Specifically, a detection element for detecting whether the staple cartridge assembly is installed is provided at the distal end of the stapler body. When the staple cartridge assembly is not installed to the stapler body of the stapler, the firing rod 3 is in the fifth position, so that the actuating rod 6 is in the fourth position, and the first connecting portion 31 abuts against the second stop portion 612 to prevent the firing rod 3 from moving in the distal direction relative to the actuating rod 6. The position of the actuating rod 6 is locked by the gear set 52 and the motor 51, and it will not move in the distal direction.

[0070] After the stapler assembly is installed on the stapler body, the detection element sends a third start signal to the control unit 53. In response to the third start signal, the control unit 53 controls the motor 51 to drive the actuating rod 6 to move in the distal direction to the third position, and the firing rod 3 remains in the fifth position. The first connecting portion 31 abuts against the first stop portion 611. At this time, the stapler enters the above-mentioned waiting-to-close state, and the stapler assembly can be closed by holding the handle 1, and the subsequent electric drive firing action can be performed.

[0071] The above embodiments are described by taking the example that the second connecting part includes a slide groove and the first connecting part is a boss. In another embodiment, the first connecting part may include a slide groove, a first stopper and a second stopper, the second connecting part may be a boss that partially enters the slide groove, and the first stopper is located at the distal end of the second stopper. The working process of this embodiment can also be realized and is also within the protection scope of this application. When the second connecting part abuts against the first stopper, the firing rod is blocked from moving in the proximal direction relative to the actuating rod. When the second connecting part abuts against the second stopper, the firing rod is blocked from moving in the distal direction relative to the actuating rod.

[0072] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A closure assembly, characterized in that: Used to drive the jaws of the stapler assembly of the electric stapler to close, the closing assembly includes a firing rod, a handle, an electric driving assembly and a sensing element, and the distal end of the firing rod is connected to the stapler assembly; Wherein, when the handle moves from the initial position to the first position, the firing rod is driven to move in the distal direction to close the jaws of the nail magazine assembly; When the sensing element detects that the handle moves to the second position, it sends a first starting signal to the electric drive assembly. In response to the first starting signal, the electric drive assembly drives the firing rod to move in the proximal direction to open the jaws of the nail magazine assembly.

2. The closure assembly according to claim 1, characterized in that The handle is configured to rotate from the initial position along a first direction to the first position and from the initial position along a second direction to the second position when driven, and the first direction and the second direction are opposite.

3. The closure assembly according to claim 2, characterized in that A mating piece is fixedly provided on the firing rod, and a driving piece is provided on the side of the handle facing the firing rod. When the handle rotates from the initial position to the first position, the driving piece rotates with the handle, the driving piece abuts against the mating piece, and drives the firing rod to move in the distal direction through the mating piece.

4. The closure assembly according to claim 1, characterized in that The electric drive assembly includes a motor, a control unit and an actuating rod. The control unit is configured to control the motor to drive the actuating rod to move in a proximal direction in response to the first start signal, and to control the motor to drive the actuating rod to move in a distal direction in response to the second start signal. The actuating rod is connected to the firing rod.

5. The closure assembly according to claim 4, characterized in that The firing rod is provided with a first connecting portion, and the actuating rod is provided with a second connecting portion, and the first connecting portion and the second connecting portion form a connection that can slide relative to each other in the axial direction; wherein, when the handle moves from the initial position to the first position, the firing rod moves in a distal direction relative to the actuating rod.

6. The closure assembly according to claim 5, characterized in that One of the first connection part and the second connection part is a boss, and the other is a slide groove. The boss is located inside the slide groove and can move along the axial direction relative to the slide groove.

7. The closure assembly according to claim 6, characterized in that A first stop portion and a second stop portion are provided inside the slide groove; when the boss abuts against the first stop portion, the firing rod is blocked from moving in the proximal direction relative to the actuating rod, and when the boss abuts against the second stop portion, the firing rod is blocked from moving in the distal direction relative to the actuating rod.

8. The closure assembly according to claim 7, characterized in that The boss is arranged at the proximal end of the firing rod, the slide groove is arranged at the distal end of the actuating rod, and the first stopper is located at the proximal end of the second stopper, or, The boss is arranged at the distal end of the actuating rod, the slide groove is arranged at the proximal end of the firing rod, and the first stop portion is located at the distal end of the second stop portion.

9. The closure assembly according to claim 7, characterized in that The actuating rod includes a third position and a fourth position located at the proximal end of the stapler, the fourth position is located at the proximal side of the third position, and the firing rod includes a fifth position and a sixth position located at the proximal end of the stapler, the sixth position is located at the distal side of the fifth position; In the waiting-to-close state, the actuating rod is located at the third position, the firing rod is located at the fifth position, and the boss and the second stop portion have an axial distance, so that the firing rod can be driven to move in the distal direction relative to the actuating rod to the sixth position; When the control unit receives the first start signal, the motor first drives the actuating rod to move in the proximal direction to the third position, and the actuating rod drives the firing rod to move in the proximal direction to the sixth position. When the motor continues to drive the actuating rod to move to the fourth position, the actuating rod drives the firing rod to move to the fifth position, and then the motor drives the actuating rod to move in the distal direction and return from the fourth position to the third position, and the firing rod stays at the fifth position.

10. The closure assembly according to claim 9, characterized in that When the stapler assembly is not installed on the stapler body of the stapler, the firing rod is in the fifth position, the actuating rod is in the fourth position, and the first connecting portion abuts against the second stop portion to prevent the firing rod from moving in the distal direction relative to the actuating rod; After the stapler assembly is installed on the stapler body, the control unit controls the motor to drive the actuating rod to move in the distal direction to the third position.

11. The closure assembly according to claim 1, characterized in that The sensing element is a contact sensing element or a distance sensing element, and the handle is provided with a triggering portion opposite to the sensing element.

12. The closure assembly according to claim 1, characterized in that The invention also includes at least one elastic member configured to apply a biasing force to the handle to keep the handle in an initial position.

13. An electric stapler, characterized in that: A closure assembly comprising the closure assembly of any one of claims 1 to 12.

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