Swinging head device and electric anastomat

Abstract

The invention provides a head swinging device and an electric anastomat. The head swinging device comprises a power mechanism, a transmission mechanism and a linkage matching piece, and the far end of the transmission mechanism is connected to a nail head part; when the head swinging device is in the first state, the linkage matching part is installed on the power mechanism and the transmission mechanism at the same time, and the power mechanism is configured to drive the transmission mechanism to move in the axial direction of the anastomat through the linkage matching part. The nail head part is driven to swing along the transverse direction of the anastomat relative to the instrument platform; when the head swinging device is in the second state, the linkage matching piece is separated from the power mechanism and / or the transmission mechanism, and the transmission mechanism can move in the axial direction relative to the power mechanism. According to the invention, electric automatic head swinging of the electric anastomat is realized, and return can be operated under the condition that the electric head swinging fails.

Description

Technical Field

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

[0002] The electrification of surgical staplers is a future development trend, which can reduce the pulling of the stapler on the tissue during operation, reduce the firing vibration, and improve the quality of tissue staplement. The electric stapler includes an instrument platform and a nail head connected to the distal end of the instrument platform. The instrument platform is provided with a closing and firing assembly that can drive the nail head to close and fire. The nail head can suturing and cutting of tissue by the drive of the closing and firing assembly. In order to adapt to different surgical scenarios, it is necessary to adjust the swing angle of the nail head relative to the instrument platform, that is, to realize the swing head control of the stapler. However, the existing electric staplers cannot realize the electric swing head of the nail head. The operator needs to hold the instrument platform with one hand and operate the manual swing head with the other hand. Single-handed operation cannot be achieved, which affects the operator's experience. Summary of the invention

[0003] In view of the problems in the prior art, the purpose of the present application is to provide a head swing device and an electric stapler, which can realize automatic electric head swing of the electric stapler and can be operated to return to the original position when the electric head fails.

[0004] The embodiment of the present application provides a swing head device for an electric stapler, the electric stapler comprising an instrument platform and a nail head located at the distal end of the instrument platform, the swing head device comprising a power mechanism, a transmission mechanism and a linkage matching member, the distal end of the transmission mechanism being connected to the nail head;

[0005] Wherein, when the swing head device is in the first state, the linkage fitting is installed on the power mechanism and the transmission mechanism at the same time, and the power mechanism is configured to drive the transmission mechanism to move along the axial direction of the stapler through the linkage fitting, so as to drive the nail head to swing laterally along the stapler relative to the instrument platform;

[0006] When the swing head device is in the second state, the linkage matching member is separated from the power mechanism and / or the transmission mechanism, and the transmission mechanism can move along the axial direction relative to the power mechanism.

[0007] In some embodiments, the device further comprises a force-applying member, and when the force-applying member is connected to the linkage matching member and is driven by an external force, the force-applying member drives the linkage matching member to be separated from the power mechanism and / or the transmission mechanism.

[0008] In some embodiments, the power mechanism includes an output shaft, and the transmission mechanism includes a first connecting portion sleeved on the outside of the output shaft;

[0009] The linkage matching piece includes a matching portion. When the swing head device is in the first state, the matching portion is fixed to the output shaft and is located at the proximal end and / or the distal end of the first connecting portion.

[0010] In some embodiments, the linkage mating piece includes two mating parts. When the swing head device is in the first state, the two mating parts are respectively sleeved on the output shaft and are respectively located at the distal end and the proximal end of the first connecting part.

[0011] In some embodiments, a step portion is provided at the proximal end of the output shaft, and an end fixing piece is provided at the distal end of the output shaft. When the swing head device is in the first state, the mating portion at the distal end is located between the end fixing piece and the first connecting portion, and the mating portion at the proximal end is located between the first connecting portion and the step portion.

[0012] In some embodiments, the matching portion includes a first opening and a second opening that are connected to each other. The matching portion is sleeved on the output shaft through the first opening, and the matching portion can be detached from the output shaft at the second opening.

[0013] In some embodiments, an inner wall of the matching portion is provided with an anti-slip structure, and / or the matching portion is elastic, and an initial opening size of the second opening is smaller than an outer diameter of the output shaft.

[0014] In some embodiments, the linkage fitting also includes an operating portion, which includes two connecting arms, an operating hole is formed between the two connecting arms, and the ends of the two connecting arms are respectively connected to one side of the two fitting portions away from the second opening.

[0015] In some embodiments, the power mechanism includes a guide member, the transmission mechanism includes a first connecting portion, the first connecting portion and the guide member form a connection that can slide along the axial direction, and when the swing head device is in the first state, the linkage matching member is simultaneously axially fixed to the first connecting portion and the guide member.

[0016] In some embodiments, the guide member is provided with a guide groove extending along the axial direction, and when the swing head device is in the first state, the first connecting portion is at least partially located in the guide groove, and an axial gap is provided between the proximal end of the first connecting portion and the bottom wall of the guide groove; and / or,

[0017] The first connecting portion is provided with a guide groove extending along the axial direction. When the swing head device is in the first state, the guide member is at least partially located in the guide groove, and an axial gap is provided between the distal end of the guide member and the bottom wall of the guide groove.

[0018] In some embodiments, when the swing head device is in the first state, the linkage matching member is at least partially simultaneously penetrated through the first connecting portion and the guide member.

[0019] The swing head device and electric stapler provided by the present application have the following advantages:

[0020] By adopting the present application, when it is necessary to adjust the angle of the nail head, the power mechanism drives the transmission mechanism to move axially along the stapler through the linkage fitting, and then drives the nail head to move laterally along the stapler relative to the instrument platform, thereby realizing the electric automatic head swing of the electric stapler. The operator can adjust the nail head to the required angle with one hand, thereby improving the user experience of the stapler; and, in the event that the electric head swing fails, the linkage fitting is removed so that it no longer blocks the axial movement of the transmission mechanism relative to the power mechanism, the transmission mechanism can move axially relative to the power mechanism, and the nail head can return to its initial state on its own, so that the stapler can be smoothly withdrawn from the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a structural schematic diagram of the swing head device of the first embodiment of the present application;

[0023] Figure 2 is a top view of the swing head device of the first embodiment of the present application;

[0024] Figure 3 is a schematic diagram of the transmission mechanism of the first embodiment of the present application when it is linked with the output shaft;

[0025] Figure 4 is a schematic diagram of the first embodiment of the present application when the linkage matching piece is taken out;

[0026] Figure 5 is a schematic diagram of the cooperation between the driving member and the output shaft of the first embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the transmission mechanism of the first embodiment of the present application when the transmission mechanism and the output shaft are not linked;

[0028] Figure 7 is a schematic diagram of the linkage matching member of the first embodiment of the present application;

[0029] Figure 8 is a schematic diagram of the transmission mechanism of the second embodiment of the present application when it is linked with the output shaft;

[0030] Fig. 9 is a schematic diagram of the cooperation between the driving member and the output shaft of the second embodiment of the present application;

[0031] Fig.10 is a schematic diagram of the transmission mechanism of the third embodiment of the present application when it is linked with the output shaft;

[0032] Fig.11 It is a schematic diagram of the cooperation between the driving member and the output shaft of the third embodiment of the present application.

[0033] Reference numerals:

[0034] 1 Power mechanism 82 force application part

[0035] 11 Motor 7 Linkage Matching Parts (Example 1)

[0036] 12 Speed ​​reducer 71 Operation part

[0037] 13 Motion conversion assembly 711 operating hole

[0038] 14 Output shaft 72 Matching portion

[0039] 141 step portion 721 first opening

[0040] 2 Transmission mechanism 722 Second opening

[0041] 21 Driving member 723 Protrusion

[0042] 211 First connecting portion 91 Guide member (Examples 2 and 3)

[0043] 212 Second connection portion 911 Proximal end of guide member

[0044] 22 Connector 912 Guide groove

[0045] 23 Transmission member 92 Linkage matching member (Examples 2 and 3)

[0046] 24 End fixing piece 921 Operation part

[0047] 8 Force-applying member 922 Matching portion

[0048] 81 Handheld DETAILED DESCRIPTION

[0049] 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.

[0050] The present application provides a head swinging device and an electric stapler including the head swinging device. The electric stapler includes an instrument platform and a nail head located at the distal end of the instrument platform. The head swinging device includes a power mechanism, a transmission mechanism and a linkage fitting, and the distal end of the transmission mechanism is connected to the nail head. The linkage fitting is detachably mounted on the power mechanism and the transmission mechanism so that the head swinging device can switch between a first state and a second state. Wherein, when the head swinging device is in the first state, the linkage fitting is simultaneously mounted on the power mechanism and the transmission mechanism, and the power mechanism is configured to drive the transmission mechanism to move along the axial direction of the stapler through the linkage fitting, so as to drive the nail head to swing laterally along the stapler relative to the instrument platform, thereby realizing the electric automatic head swinging of the electric stapler, and the operator can adjust the nail head to the required angle with one hand, thereby improving the use experience of the stapler.

[0051] In the event that the electric swing head fails, the linkage fitting is removed, the swing head device is in the second state, the linkage fitting is disengaged from the power mechanism and / or the transmission mechanism, and the transmission mechanism can move along the axial direction relative to the power mechanism, so that the nail head can return to the initial state by itself, allowing the stapler to be smoothly withdrawn from the body.

[0052] The structure of the swing head device in a specific embodiment is described below in conjunction with the accompanying drawings. It should be understood that the accompanying drawings and the following description are only examples and are 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 farther from the operator, that is, closer to the surgical site, and the proximal end is closer to the operator, that is, farther from the surgical site. The axial direction refers to the direction from the distal end to the proximal end or from the proximal end to the distal end of the stapler, and the transverse direction refers to the width direction of the stapler. As shown in Figure 2 In the perspective of the anastomosis device, the S1 direction or the direction opposite to the S1 direction is the axial direction, and the S2 direction or the direction opposite to the S2 direction is the transverse direction. The outer side and the inner side are relative to the axis S0 of the stapler (shown in FIG. Figure 2 ), the side close to the axis S0 of the stapler is the inner side, and the side away from the axis S0 of the stapler is the outer side.

[0053] Figures 1 to 7 The structure of the swing head device of the first embodiment of the present application is shown. The swing head device is at least partially arranged inside the instrument platform housing of the stapler. Figures 1 to 3 As shown, the swing head device includes a power mechanism 1, a transmission mechanism 2 and a linkage matching member 7. The power mechanism 1 includes a motor 11 and an output shaft 14, and the motor 11 is configured to drive the output shaft 14 to move along the axial direction of the stapler. The transmission mechanism 2 includes a driving member 21, a connecting member 22 and a transmission member 23, and the driving member 21 includes a first connecting portion 211 located at the proximal end and a second connecting portion 212 located at the distal end. The driving member 21 and the transmission member 23 are rods extending along the axial direction, but the present application is not limited thereto. The second connecting portion 212 of the driving member 21 is connected to the proximal end of the transmission member 23 through the connecting member 22, and the distal end of the transmission member 23 is connected to the nail head (not shown in the figure). The output shaft 14 extends along the axial direction, and the first connecting portion 211 of the driving member 21 is sleeved on the outside of the output shaft 14, forming a connection with the output shaft 14 that can slide along the axial direction.

[0054] The linkage fitting 7 is detachably mounted on the power mechanism 1 and the transmission mechanism 2, so that the swing head device can be switched between the first state and the second state. Figure 1 and Figure 2 As shown, when the head swing device is in the first state, the linkage fitting 7 is simultaneously installed on the output shaft 14 of the power mechanism 1 and the first connecting portion 211 of the transmission mechanism 2. The power mechanism 1 is configured to drive the transmission mechanism 2 to move along the axial direction of the stapler through the linkage fitting 7, so as to drive the nail head to swing laterally along the stapler relative to the instrument platform, thereby realizing the electric automatic head swing of the electric stapler. The operator can adjust the nail head to the required angle with one hand, thereby improving the use experience of the stapler. Figure 2 From the perspective of FIG. 1 , when the power mechanism 1 drives the transmission mechanism 2 to move toward the proximal direction, the nail head can be driven along Figure 2 When the power mechanism 1 drives the transmission mechanism 2 to move toward the distal end, the nail head can be driven along the Figure 2 Swing in SW2 direction.

[0055] like Figure 2As shown, the motor 11 is a rotary motor, and the power mechanism 1 further includes a reducer 12 and a motion conversion assembly 13. The motor 11 is connected to the output shaft 14 through the reducer 12 and the motion conversion assembly 13 in sequence, and the motion conversion assembly 13 is configured to convert the rotary motion output by the motor 11 into a linear motion. The motion conversion assembly 13 may, for example, include a ball screw structure, or include a screw-nut matching structure, etc. The present application is not limited to this. In another embodiment, the motor 11 may be a linear motor, and the power mechanism 1 further includes a reducer 12, and the motor 11 is directly connected to the output shaft 14 through the reducer 12.

[0056] When the swing head device is in the first state, the power mechanism 1 and the transmission mechanism 2 are linked, and the electric swing head can be realized through the power mechanism 1 and the transmission mechanism 2. However, during use, if the electric swing head function fails unexpectedly, such as the motor 11 fails to work, the reducer 12 fails to work, the motion conversion component 13 has poor contact, etc., if the linkage state of the power mechanism 1 and the transmission mechanism 2 is still maintained, the power mechanism 1 will limit the axial movement of the transmission mechanism 2, so that the nail head cannot be returned to the correct position and cannot be smoothly withdrawn from the body. By adopting the swing head device structure of the present application, the linkage state between the power mechanism 1 and the transmission mechanism 2 can be released by removing the linkage fitting 7, so that the transmission mechanism 2 is no longer restricted by the power mechanism 1.

[0057] like Figure 6 As shown, when the electric swing head fails, the linkage fitting 7 is removed, the swing head device is in the second state, the linkage fitting 7 is separated from the power mechanism 1 and the transmission mechanism 2, and the transmission mechanism 2 can move along the axial direction relative to the power mechanism 1, so that the stapler head can return to the initial state by itself, so that the stapler can be smoothly withdrawn from the body.

[0058] The removal of the linkage fitting 7 can be achieved by a force applying member 8. Figure 4 As shown, the linkage matching member 7 includes an operating portion 71 and a matching portion 72, an operating hole 711 is provided in the operating portion 71, and the force-applying member 8 includes a force-applying portion 82 and a hand-held portion 81. When in use, the force-applying portion 82 is inserted into the operating hole 711, and an external force is applied to the hand-held portion 81, and the force-applying member 8 pries up the linkage matching member 7, so that the matching portion 72 is separated from the power mechanism 1 and the transmission mechanism 2. In another embodiment, the force-applying member 8 may not be provided, and the linkage matching member 7 is at least partially exposed outside the housing of the instrument platform. When the linkage between the power mechanism 1 and the transmission mechanism 2 needs to be released, the linkage matching member 7 is directly removed manually.

[0059] like Figures 3 to 7As shown, the linkage fitting 7 includes two fitting parts 72, and the fitting part 72 includes a first opening 721 and a second opening 722 that are connected to each other, and the first opening 721 is an opening along the axial direction. The fitting part 72 is sleeved on the output shaft 14 through the first opening 721, and the fitting part 72 can be detached from the output shaft 14 at the second opening 722. The operating part 71 includes two connecting arms, an operating hole 711 is formed between the two connecting arms, and the ends of the two connecting arms are respectively connected to the sides of the two fitting parts 72 away from the second opening 722. The fitting part 72 is elastic, and the initial opening size of the second opening 722 is smaller than the outer diameter of the output shaft 14. When the fitting part 72 is sleeved on the outside of the output shaft 14, the fitting part 72 is kept stably fixed to the output shaft 14 to avoid accidental falling off. The linkage fitting 7 can be a silicone or rubber sheath, but the present application is not limited thereto. Figure 7 As shown, the inner wall of the matching portion 72 is provided with a protrusion 723, so that the connection between the matching portion 72 and the output shaft 14 is more stable, and other anti-slip structures such as anti-slip grooves can also be provided inside the matching portion 72.

[0060] like Figure 3 As shown, the proximal end of the output shaft 14 is provided with a step portion 141, and the distal end of the output shaft 14 is provided with an end fixing piece 24. The step portion 141 can be a portion with a larger outer diameter that is integrally formed with the output shaft 14, or can be implemented by a fixing piece that is sleeved on the proximal end of the output shaft 14. The end fixing piece 24 can be, for example, a bolt. The distal outer surface of the output shaft 14 is provided with an external thread that cooperates with the bolt. When assembling the drive member 21 and the output shaft 14, the end fixing piece 24 can be removed, the first connecting portion 211 can be inserted from the distal end of the output shaft 14, and then the end fixing piece 24 can be installed. As shown in FIG. Figure 6 As shown, when the linkage fitting 7 is removed, the axial movement stroke of the first connecting portion 211 relative to the output shaft 14 is from the proximal end surface of the end fixing member 24 to the distal end surface of the step portion 141 .

[0061] When the swing head device is in the first state, the matching portion 72 at the distal end is located between the end fixing member 24 and the first connecting portion 211, and the matching portion 72 at the proximal end is located between the first connecting portion 211 and the step portion 141. When the swing head device is in the first state, the linkage matching member 7 keeps the first connecting portion 211 at a substantially middle position of the above-mentioned axial motion stroke. Therefore, after the linkage matching member 7 is removed, the first connecting portion 211 can move in the distal direction and in the proximal direction relative to the output shaft 14, which can be applied to the nail head return in different scenarios. That is, if the nail head is in a state of deflection relative to S0 toward SW1 before return, after the linkage matching member 7 is removed, during the return of the nail head, the first connecting portion 211 can move in the distal direction; if the nail head is in a state of deflection relative to S0 toward SW2 before return, after the linkage matching member 7 is removed, during the return of the nail head, the first connecting portion 211 can move in the proximal direction. The axial dimension of the matching portion 72 is greater than or equal to the movement distance of the first connecting portion 211 when the nail head returns to the initial state from the maximum swing angle.

[0062] Figure 8 and Fig. 9 A partial schematic diagram of a swing head device in a second embodiment of the present application is shown. In this embodiment, the power mechanism 1 further includes a guide member 91, the proximal end 911 of the guide member 91 is fixed to the output shaft 14 and cannot move in the axial direction relative to the output shaft 14. The first connecting portion 211 of the driving member 21 forms a connection with the guide member 91 that can slide along the axial direction. The linkage matching member 92 includes an operating portion 921 and a matching portion 922. The operating portion 921 can also be connected to the output shaft 14. Figure 4 When the swing head device is in the first state, the matching portion 922 of the linkage matching member 92 is at least partially penetrated through the first connecting portion 211 and the guide member 91 at the same time, so that the first connecting portion 211 and the guide member 91 are relatively fixed in the axial direction, thus forming a linkage state of the transmission mechanism 2 and the power mechanism 1.

[0063] like Figure 8 and Fig. 9As shown, the guide member 91 is provided with a guide groove 912 extending along the axial direction. When the swing head device is in the first state, the first connection part 211 is at least partially located in the guide groove 912, and there is an axial gap between the proximal end of the first connection part 211 and the bottom wall of the guide groove 912, that is, there is space for the first connection part 211 to move toward the proximal direction. Therefore, after removing the linkage matching member 92, the first connection part 211 can move in the distal direction relative to the guide member 91, and can also move in the proximal direction relative to the guide member 91. The distal end of the guide groove 912 and the proximal end of the first connection part 211 can be respectively provided with matching stop structures, for example, a first stop is provided on the distal inner wall of the guide groove 912, and a second stop is provided at the proximal end of the first connection part 211. When the first connection part 211 moves to the distal end until the second stop abuts against the first stop, the first connection part 211 cannot continue to move in the distal direction. When the swing head device enters the second state from the first state, the stroke of the first connecting part 211 that can move in the distal direction and the stroke of the first connecting part 211 that can move in the proximal direction are greater than or equal to the movement distance of the first connecting part 211 when the nail head returns to the initial state from the maximum swing head angle.

[0064] Fig.10 and Fig.11 A partial schematic diagram of a swing head device according to a third embodiment of the present application is shown. The difference between this embodiment and the second embodiment is that the guide groove 912 of the guide member 91 is an open groove, the guide member 91 includes two guide arms located on both sides of the guide groove 912, and the first connecting portion 211 at least partially enters between the two guide arms.

[0065] The second embodiment and the third embodiment are both described by taking the guide groove 912 provided on the guide member 91 as an example. In another alternative embodiment, the first connecting portion 211 may also be provided with a guide groove 912 extending along the axial direction, and the guide groove 912 may be in the form of an internal slot in the second embodiment or in the form of an open slot in the third embodiment. When the swing head device is in the first state, the guide member 91 is at least partially located in the guide groove 912, and there is an axial gap between the distal end of the guide member 91 and the bottom wall of the guide groove 912 to leave space for the first connecting portion 211 to move toward the proximal direction. The guide member 91 in the second embodiment and the third embodiment may be a rod, a plate, a tubular member, etc. In another alternative embodiment, the output shaft 14 may also be directly omitted, and the guide member 91 may be connected to the output end of the reducer 12 or the output end of the motion conversion assembly 13, which also belongs to the protection scope of the present application.

[0066] In the above embodiments, the transmission mechanism 2 includes a driving member 21, a connecting member 22 and a transmission member 23. In other embodiments, the transmission mechanism 2 may also include only the driving member 21 or include more components, which does not affect the coordination between the driving member 21 of the present application and the power mechanism 1 and the linkage matching parts, and all belong to the protection scope of the present application.

[0067] 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 head swing device, characterized in that: For an electric stapler, the electric stapler comprises an instrument platform and a nail head located at the distal end of the instrument platform, the swing head device comprises a power mechanism, a transmission mechanism and a linkage matching piece, and the distal end of the transmission mechanism is connected to the nail head; Wherein, when the swing head device is in the first state, the linkage fitting is installed on the power mechanism and the transmission mechanism at the same time, and the power mechanism is configured to drive the transmission mechanism to move along the axial direction of the stapler through the linkage fitting, so as to drive the nail head to swing laterally along the stapler relative to the instrument platform; When the swing head device is in the second state, the linkage matching member is separated from the power mechanism and / or the transmission mechanism, and the transmission mechanism can move along the axial direction relative to the power mechanism.

2. The head swing device according to claim 1, characterized in that: The device further comprises a force applying member, and when the force applying member is connected to the linkage matching member and is driven by an external force, the force applying member drives the linkage matching member to be separated from the power mechanism and / or the transmission mechanism.

3. The head swing device according to claim 1, characterized in that: The power mechanism includes an output shaft, and the transmission mechanism includes a first connecting portion sleeved on the outside of the output shaft; The linkage matching piece includes a matching portion. When the swing head device is in the first state, the matching portion is fixed to the output shaft and is located at the proximal end and / or the distal end of the first connecting portion.

4. The head swing device according to claim 3, characterized in that: The linkage matching piece includes two matching parts. When the swing head device is in the first state, the two matching parts are respectively sleeved on the output shaft and are respectively located at the distal end and the proximal end of the first connecting part.

5. The head swing device according to claim 4, characterized in that: A step portion is provided at the proximal end of the output shaft, and an end fixing piece is provided at the distal end of the output shaft. When the swing head device is in the first state, the matching portion at the distal end is located between the end fixing piece and the first connecting portion, and the matching portion at the proximal end is located between the first connecting portion and the step portion.

6. The head swing device according to claim 4, characterized in that: The matching portion includes a first opening and a second opening that are connected to each other. The matching portion is sleeved on the output shaft through the first opening, and the matching portion can be separated from the output shaft at the second opening.

7. The head swing device according to claim 6, characterized in that: The inner wall of the matching portion is provided with an anti-slip structure, and / or the matching portion is elastic, and an initial opening size of the second opening is smaller than an outer diameter of the output shaft.

8. The head swing device according to claim 6, characterized in that: The linkage fitting also includes an operating portion, which includes two connecting arms. An operating hole is formed between the two connecting arms, and the ends of the two connecting arms are respectively connected to one side of the two fitting portions away from the second opening.

9. The head swing device according to claim 1, characterized in that: The power mechanism includes a guide member, and the transmission mechanism includes a first connecting portion, the first connecting portion and the guide member form a connection that can slide along the axial direction, and when the swing head device is in the first state, the linkage matching member is simultaneously axially fixed to the first connecting portion and the guide member.

10. The head swing device according to claim 9, characterized in that: The guide member is provided with a guide groove extending along the axial direction, and when the swing head device is in the first state, the first connecting portion is at least partially located in the guide groove, and an axial gap is provided between the proximal end of the first connecting portion and the bottom wall of the guide groove; and / or, The first connecting portion is provided with a guide groove extending along the axial direction. When the swing head device is in the first state, the guide member is at least partially located in the guide groove, and an axial gap is provided between the distal end of the guide member and the bottom wall of the guide groove.

11. The head swing device according to claim 9, characterized in that: When the swing head device is in the first state, the linkage matching member is at least partially simultaneously penetrated through the first connecting portion and the guide member.

12. An electric stapler, characterized in that: The invention comprises the swing head device according to any one of claims 1 to 11.

Images