CN111759385B

CN111759385B - Electric anastomat and loading unit thereof

Info

Publication number: CN111759385B
Application number: CN202010694705.3A
Authority: CN
Inventors: 李宇
Original assignee: Reach Surgical Inc
Current assignee: Reach Surgical Inc
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-11-30
Anticipated expiration: 2040-07-17
Also published as: CN111759385A

Abstract

The invention relates to the technical field of medical instruments, in particular to an electric anastomat, which comprises: the handle assembly comprises a power device and a driving system which are arranged in the handle assembly; an elongate body extending distally from a distal end of the handle assembly; a loading unit detachably mounted at the distal end of the elongated body and including a firing bar assembly operably reciprocated by a drive system; a stroke control device, the stroke control device comprising: a trigger mechanism disposed within the loading unit; a communication mechanism, at least a portion of which is disposed within the elongate body and is operatively electrically connected to the trigger mechanism; the trigger part is arranged on the firing rod assembly and is suitable for being matched with the trigger mechanism to generate a trigger signal when moving along with at least one part of the motion of the firing rod assembly so as to control the output of the power device. The invention provides an electric anastomat which is low in cost and convenient to control and operate and a loading unit thereof.

Description

Electric anastomat and loading unit thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to an electric anastomat and a loading unit thereof.

Background

Staplers are devices used in medicine to replace manual suturing, and are surgical instruments that use titanium staples to staple tissue. The electric anastomat is an anastomat which replaces the traditional manual driving by electric driving, a loading unit is detachably arranged at the far end of the electric anastomat, and suturing nails and a cutting knife are arranged in the loading unit so as to realize the cutting and the suturing of tissues. The electric anastomat is usually driven by a motor, a driving rod in a handle of the electric anastomat is pushed to move from the near end to the far end of the electric anastomat through the rotation of the motor, and in the moving process, the driving rod pushes a firing rod assembly to move towards the far end, so that the nail pusher is pushed to push a suturing nail out for forming, and the suturing of tissues is completed. Loading units of the anastomat usually have different models and specifications according to different firing strokes, and therefore a driving system of a handle part of the electric anastomat is required to output driving of corresponding strokes aiming at the loading units with different firing strokes.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the problem of the prior art that needs to output a driving corresponding to a stroke for loading units with different firing strokes, and to provide an electric stapler and a loading unit thereof, which have low cost and are convenient to control and operate.

In order to solve the above technical problem, the present invention provides an electric stapler, including:

a handle assembly which is used for connecting the handle assembly,

a power unit, a drive system and a control system disposed within the handle assembly;

an elongate body extending distally from a distal end of the handle assembly;

a loading unit removably mounted to the distal end of the elongate body, the loading unit including a firing rod assembly operably reciprocated by the drive system;

further comprising a stroke control device, the stroke control device comprising:

the trigger mechanism is arranged in the loading unit, and a trigger is arranged on the trigger mechanism;

a communication mechanism in operative electrical connection with the control system and the triggering mechanism, respectively;

the trigger part is arranged on the firing rod assembly, is matched with the trigger to generate a trigger signal when moving along with at least one part of the firing rod assembly, and transmits the trigger signal to the control system through the communication mechanism.

Further, the trigger mechanism further comprises a first lead, the trigger being disposed at a distal end of the first lead; and a connection contact disposed at the proximal end of the first wire, the connection contact being operatively electrically connected to the communication mechanism.

Further, the communication mechanism includes: a second conductive line; and a connection plate disposed at a distal end of the second wire, the connection plate being in operable electrical connection with the trigger mechanism.

Further, the communication mechanism further includes: at least one resilient connector provided on the connection plate, the resilient connector being adapted to be in operative electrical connection with a connection contact of the triggering mechanism.

Further, the stroke control device also comprises an electric connecting plate which is respectively and electrically connected with the communication mechanism and the control system.

Further, the firing bar assembly includes: the trigger rod connector is suitable for being detachably connected with a driving rod of the driving system.

Further, the trigger portion is disposed on the firing bar connector.

Further, the firing bar assembly further comprises a slide member slidably mounted on the firing bar body, the trigger being disposed on the slide member.

Further, a sliding groove is formed in the firing bar body, and the sliding member is slidably mounted on the sliding groove.

Further, the trigger is a normally closed switch, and when the trigger rod connector moves to abut against the normally closed switch, the normally closed switch is disconnected to generate a trigger signal.

Still further, the trigger is a normally closed switch, and when the sliding member moves to abut against the normally closed switch, the normally closed switch is turned off to generate a trigger signal.

Further, the sliding member includes:

a fixed part;

a connecting portion extending proximally from an end of the fixing portion; and

the groove is formed in the fixing portion, and the sliding component is installed on the firing rod body through the groove.

Further, a recess is also provided in the cannula assembly, the trigger being disposed in the recess, the slide member snapping into the recess when the slide member is moved to the triggered position.

Further, the flip-flop includes: the supporting frame and the conductor arranged on the supporting frame; the sliding member moves to and breaks the conductor, generating a trigger signal.

Further, the flip-flop includes: the supporting frame and set up the elastic conductor on the supporting frame, the elastic conductor is separable structure, sliding member moves to and pushes against the elastic conductor and makes its separation, produces trigger signal.

The present invention also provides a loading unit adapted to be removably mounted on an elongated body of an electric stapler, comprising:

an end effector;

a sleeve assembly including a firing rod assembly operable to reciprocate; and a trigger disposed on the firing rod assembly; and

a trigger mechanism, wherein the trigger portion cooperates with the trigger mechanism to generate a trigger signal when the trigger portion moves with movement of at least a portion of the firing bar assembly.

Further, the trigger mechanism comprises a first lead, and a trigger is arranged at the far end of the first lead and is matched with the trigger part on the firing rod assembly to generate a trigger signal.

The technical scheme of the invention has the following advantages:

1. the invention provides an electric anastomat, which comprises a handle assembly, a power device and a driving system, wherein the power device and the driving system are arranged in the handle assembly; an elongate body extending distally from a distal end of the handle assembly; a loading unit removably mounted to the distal end of the elongate body and including a firing rod assembly operably reciprocated by the drive system; a stroke control device, the stroke control device comprising: a trigger mechanism disposed within the loading unit; a communication mechanism, at least a portion of which is disposed within the elongate body and is operably electrically connected to the trigger mechanism; the trigger part is arranged on the firing rod assembly and is suitable for being matched with the trigger mechanism to generate a trigger signal when moving along with at least one part of the motion of the firing rod assembly so as to control the output of the power device.

The trigger mechanism, the communication mechanism and the trigger part are arranged in the electric anastomat, so that when the electric anastomat is used and moves to the trigger position of the trigger mechanism through the trigger part, a signal of the loaded unit is identified, meanwhile, a trigger signal generated through the matching of the trigger part and the trigger mechanism is transmitted back to the driving system through the communication mechanism, and the driving system further controls the power device to stop rotating and outputting, so that the motion of the firing rod assembly in the loading unit is stopped. Compared with the electric anastomat in the prior art, the electric anastomat is simple in structure, the type of the loading unit can be identified through the arrangement of the trigger mechanism, the communication mechanism and the trigger part, and meanwhile, the operation is simple and convenient.

2. According to the electric anastomat provided by the invention, the sliding component is an insulating part, so that the sliding component is prevented from forming electric connection with other mechanisms when sliding in the casing of the casing, and the internal signal transmission is interfered.

3. The invention provides an electric anastomat, wherein the trigger comprises: a support frame provided with an opening; a conductor within the opening; the sliding member further includes a cutting portion that contacts the conductor, cutting the conductor. The wire of the trigger is cut off by the cutting part on the sliding component, so that the connection between the trigger mechanism and the communication mechanism is cut off, and when the loading unit is used next time, the trigger mechanism and the communication mechanism can not be changed into a passage again, namely, an electric signal can not be generated again, so that the misoperation of the loading unit, namely the condition that the loading unit is used again after being used, is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an electric stapler according to the present invention;

FIG. 2 is a schematic structural view of the handle assembly;

FIG. 3 is an exploded view of the loading unit with the trigger being a normally closed switch and no sliding member;

FIG. 4 is a schematic view of the structure of the loading unit of the electric stapler when it is not connected;

FIG. 5 is a schematic structural view of a firing bar assembly;

FIG. 6 is a schematic view of the connection of the trigger mechanism and the communication mechanism;

FIG. 7 is a schematic view of a sleeve assembly;

FIG. 8 is a schematic view of the communication mechanism within the handle and elongate body;

FIG. 9 is a schematic view of the connection of the trigger mechanism to the electrical connection board;

FIG. 10 is a schematic view of the communication mechanism and attachment plate within the handle and elongated body;

FIG. 11 is an exploded view of the loading unit with the trigger being a normally closed switch and a sliding member;

FIG. 12 is a schematic structural view of the loading unit with the trigger being a normally closed switch and a sliding member;

FIG. 13 is a schematic view of the internal driving structure of the loading unit when the trigger is a normally closed switch;

FIG. 14 is a structural schematic view of the sliding member in a disengaged state from the initial position of the firing bar connector;

FIG. 15 is a schematic view of the sliding member structure when the trigger is a normally closed switch;

FIG. 16 is a bottom view of the slide member of FIG. 15;

FIG. 17 is an exploded view of the loading unit with the trigger being a conductor;

FIG. 18 is a schematic view of the trigger mechanism when the trigger is a conductor;

FIG. 19 is a schematic diagram of the internal driving structure of the loading unit when the flip-flop is a conductor

FIG. 20 is a schematic view of the structure of the sliding member when the trigger is a conductor;

FIG. 21 is a bottom view of the slide member of FIG. 20;

FIG. 22 is an exploded view of the loading unit with the trigger being a dome;

FIG. 23 is a schematic structural view of the trigger mechanism when the trigger is a spring;

FIG. 24 is a schematic view of an internal driving structure of the loading unit when the trigger is a spring plate;

FIG. 25 is a schematic structural view of the sliding member when the trigger is a resilient piece;

fig. 26 is a bottom view of the slide member of fig. 25.

Detailed Description

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

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In various embodiments of the present invention, "distal/distal" refers to the end/side of the surgical instrument that is distal from the user when the surgical instrument is operated, and "proximal/proximal" refers to the end/side of the surgical instrument that is proximal to the user when the surgical instrument is operated.

Fig. 1 illustrates a powered stapler 100 according to an embodiment of the present invention, including a handle assembly 80, an elongated body 10, and a loading unit 50, wherein the elongated body 10 extends distally from a distal end of the handle assembly 80, the loading unit 50 is removably mounted to a distal end of the elongated body 10, the loading unit 50 further including a cannula assembly 60 and an end effector 70, wherein the end effector 70 is adapted to perform a specific surgical operation, such as clamping, stapling/stapling, cutting, etc., tissue. As further shown in FIG. 1, the handle assembly 80 includes a trigger 81 and a grip portion 82. When the trigger 81 is pulled in the direction of the gripping portion 82, jaw closure of the end effector 70 is achieved. In addition, trigger 81 may also be configured to control the output of the power device of the electric stapler 100.

As further shown in fig. 1, electric stapler 100 according to an embodiment of the present invention further includes a rotating head 86, wherein rotating head 86 is mounted on the distal side of handle assembly 80 and is fixedly connected to the proximal end of elongated body 10, and when rotating head 86 is operated to rotate about longitudinal axis C of electric stapler 100, elongated body 10 and loading unit 50 are rotated together. In addition, the electric stapler 100 according to the embodiment of the present invention further includes a turning knob 87, wherein the turning knob 87 is rotatably installed on the rotating head 86 and adapted to drive the end effector 70 of the loading unit 50 to perform a pivoting motion when the turning knob 87 is operated to rotate. In addition, the handle assembly 80 further includes a battery housing 88 adapted to receive a battery to power the powered stapler 100.

With further reference to fig. 2, the internal structure of the handle assembly 80 of the electric stapler 100 provided in the present embodiment is shown, wherein the power device 85 is disposed in the handle housing 83, the handle housing 83 is composed of two

half shells

83a and 83b, and the power device 85 provides the output power for the electric stapler 100. The power device 85 for the electric stapler 100 may be any type of motor as long as it can satisfy the specific output form and requirement of the electric stapler 100, for example, the power device 85 of the electric stapler 100 described in this embodiment uses a dc brush motor, and the electric firing (advancing) and electric retracting functions of the electric stapler 100 are realized by the forward rotation and reverse rotation of the motor. Of course, the power unit 85 may be a dc brushless motor or other type of motor.

FIG. 3 is an exploded view of a loading unit 50 according to an embodiment of the present invention, and in particular, the cannula assembly 60 includes a cannula housing 601 and a frame assembly 602, the frame assembly 602 being received within the cannula housing 601 and being comprised of an upper frame portion 602a and a lower frame portion 602b adapted to receive the firing rod assembly 61 and provide corresponding support and restraint. In addition, the end effector 70 of the loading unit 50 according to the present embodiment is hinged to the sleeve assembly 60 by the hinge assembly 51, so that the end effector 70 can perform a pivotal movement relative to the sleeve assembly 60, i.e., a bending function is performed.

With further reference to FIG. 3, the end effector 70 includes a magazine base 71, a magazine assembly 72, and an anvil assembly 73, the magazine assembly 72 being removably or non-removably mounted within the magazine base 71, the anvil assembly 73 having a proximal end pivotally coupled to the proximal end of the magazine base 71 such that the anvil assembly 73 is capable of pivotal movement relative to the magazine base 71 and cooperates with the magazine surface 721 of the magazine assembly 72 to clamp tissue disposed therein.

Further, referring to fig. 2-4, the powered stapler 100 according to an embodiment of the present invention further includes a drive system 89, the drive system 89 including a gear assembly 891, a rack assembly 892, and a drive rod 893, the gear assembly 891 being connected to the output of the power device 85 and the rack assembly 892, respectively, the drive rod 893 being disposed partially distally within the elongated body 10 and having a proximal end connected to the rack assembly 892. In other embodiments, the power device 85 is further provided with a reduction box 852, and the motor 851 is connected with the gear assembly 891 through the reduction box 852 to output power for the electric stapler 100.

With further reference to FIG. 5, the firing bar assembly 61 includes a firing bar body 610 and a firing bar connector 611 disposed at a proximal end of the firing bar body 610, the firing bar connector 611 being adapted to be detachably coupled to a distal end 894 (shown in FIG. 4) of the drive bar 893 such that power from the power device 85 causes the drive bar 893 to reciprocate along a longitudinal axis C of the electric stapler 100 via the drive system 89 and causes the firing bar connector 611 to drive the firing bar body 610 of the firing bar assembly 61 to reciprocate to advance (move distally) and retract (move proximally) the firing bar assembly 61.

Referring to fig. 3 and 6, the electric stapler 100 provided by the embodiment of the present invention further includes a stroke control device 20, as shown in fig. 6, the stroke control device 20 includes a distal trigger mechanism 21 and a proximal communication mechanism 22, wherein the communication mechanism 22 is respectively and electrically connected to the trigger mechanism 21 and the control system 84, specifically, as shown in fig. 3, 6, 7 and 8, the trigger mechanism 21 is disposed in the cannula assembly 60 of the loading unit 50, at least a portion of the communication mechanism 22 is disposed in the elongated body 10, the trigger mechanism 21 includes a first wire 210, a trigger 211 is disposed at a distal end of the first wire 210, the trigger 211 is electrically connected to the first wire 210, and a connection contact 212 is disposed at a proximal end of the first wire 210. The communication mechanism 22 includes a second wire 220, with a connection plate 221 disposed at a distal end of the second wire 220 adapted to be operatively electrically connected to the connection contact 212 of the trigger mechanism 21. The connection board 221 of the communication mechanism 22 of the stroke control device 20 according to the embodiment of the present invention may be electrically connected to the connection contact 212 of the trigger mechanism 21 in various ways, for example, one or more elastic connectors 222 may be disposed on the connection board 221, and one or more elastic connectors 222 may be correspondingly contacted with one or more connection contacts 212, so as to establish a communication path. In an alternative embodiment, stroke control device 20 further includes an electrical connection board 23, as shown in fig. 9, the proximal end of second wire 220 of communication mechanism 22 is electrically connected to electrical connection board 23, and electrical connection board 23 is electrically connected to control system 84 of electric stapler 100. With particular reference to fig. 10, the connection plate 221 of the communication mechanism 22 may be fixedly connected to the wall of the elongated body 10. When loading unit 50 is mounted in the correct mounting position of elongated body 10 of electric stapler 100, connection plate 221 contacts connection contacts 212 to form a communication loop, providing an enabling signal to control system 84 of electric stapler 100.

Further, the stroke control device 20 further comprises a trigger portion disposed on the firing rod assembly 61, and cooperating with the trigger mechanism 21 to form a trigger signal when moving along with at least a portion of the movement of the firing rod assembly 61, and transmitting the trigger signal to the control system 84 through the communication mechanism 22.

Specifically, for example, in the present embodiment, the trigger is a firing bar connector 611 on the firing bar assembly 61, i.e., when the firing bar connector 611 moves distally into contact with the trigger 211, the stroke control 20 generates and transmits a trigger signal to the control system 84, and the control system 84 shuts off the output of the power device 85 in accordance with the trigger signal.

In an alternative embodiment, as shown in FIG. 11, the firing bar assembly 61 further comprises a slide member 612, the slide member 612 being slidably mounted on the firing bar body 610 of the firing bar assembly 61 and distal to the firing bar connector 611. In this embodiment, a trigger is provided on the sliding member 612, i.e. the sliding member 612 is arranged to contact the trigger 211 and trigger the stroke control device 20 to generate the trigger signal. Specifically, the sliding member 612 has a first state (abutting state) in which a distal end surface of the firing bar connector 611 abuts a proximal end surface of the sliding member 612 against the firing bar connector 611; the slide member 612 has a second state (detached state) detached from the firing bar connector 611.

For example, when the loading unit 50 is in an initial state, i.e., an unused state, at which time the slide member 612 is in a first state with its proximal end face abutting the distal end face of the firing bar connector 611, as shown in FIG. 12; when the firing bar assembly 61 of the power stapler 100 is operated to move distally, the firing bar connector 611 pushes the sliding members 612 together to move distally, during which the sliding members 612 are always in the first state. When the sliding member 612 moves distally into contact with the trigger 211, the trigger travel control 20 generates a trigger signal and transmits it to the control system 84, and the control system 84 shuts off the output of the power unit 85 in response to the trigger signal. Then, when the firing bar assembly 61 of the power stapler 100 is operated to move proximally, since the sliding member 612 is not fixedly connected to the firing bar connector 611, the sliding member 612 will slide on the firing bar body 610 and disengage from the firing bar connector 611, entering a second state separated from the firing bar connector 611.

As an alternative embodiment, when the loading unit 50 is in the initial state, i.e., the unused state, the slide member 612 is in any position on the firing bar body 610, while the slide member 612 is in the second state separated from the firing bar connector 611, when the firing bar assembly 61 of the electric stapler 100 is operated to move distally, the firing bar connector 611 gradually approaches the slide member 612 and finally abuts against the proximal end surface thereof, so that the slide member 612 enters the first state, and the firing bar connector 611 in turn pushes the slide member 612 to move distally together. When the sliding member 612 moves distally into contact with the trigger 211, the trigger travel control 20 generates a trigger signal and transmits it to the control system 84, and the control system 84 shuts off the output of the power unit 85 in response to the trigger signal. Then, when the firing bar assembly 61 of the power stapler 100 is operated to move proximally, since the sliding member 612 is not fixedly connected to the firing bar connector 611, the sliding member 612 will slide on the firing bar body 610 and disengage from the firing bar connector 611, and then enter a second state separated from the firing bar connector 611.

More specifically, as shown in FIG. 13, a slide slot 613 is provided on the firing bar body 610, and the slide member 612 is slidably mounted on the slide slot 613. In the above-described embodiment, the sliding member 612 is made of an insulating material to prevent the sliding member 612 from making electrical connections with other components as it slides on the firing bar body 610, interfering with internal signal transmission, and generating a trigger signal.

The trigger mechanism 21 and the sliding member 612 of the electric stapler 100 provided by the embodiment of the present invention can be arranged in a plurality of different structures, and some specific embodiments of the trigger mechanism 21 and the sliding member 612 will be described in more detail with reference to the accompanying drawings.

For example, the trigger 211 described in the above embodiments is provided as a normally closed switch that will be maintained in a closed state when the trigger 211 is not triggered. As shown in fig. 14 to 16, the sliding member 612 includes a fixing portion 6120 and a connecting portion 6121, and the connecting portion 6121 may be provided in plurality, for example, in the embodiment, the connecting portion 6121 includes a first connecting portion 6121a and a second connecting portion 6121b, and ends perpendicular to the fixing portion 6120 are respectively located on the same plane as the fixing portion 6120. The sliding member 612 further includes a groove 6123 disposed on the fixing portion 6120, and projections of the first connecting portion 6121a and the second connecting portion 6121b on the fixing portion 6120 are respectively located at two sides of the groove 6123. The slide member 612 is mounted to the firing bar body 610 via a groove 6123 such that the slide member 612 can slide along the chute 613 of the firing bar body 610. The sliding member 612 requires an external force when sliding on the sliding groove 613 of the firing bar body 610, and does not slide by itself.

When the sliding member 612 slides to the triggering position and contacts the trigger 211, the protrusion 6124 on the sliding member 612 causes the normally closed switch to open, thereby generating a triggering signal, and the control system 84 cuts off the output of the power device 85 according to the triggering signal, i.e., controls the power device 85 to stop rotating.

As an alternative embodiment, as shown in fig. 12, a recess 603 is further provided on the distal side of the frame assembly 602 of the cannula assembly 60, the trigger 211 is disposed in the recess 603, and when the sliding member 612 moves to the triggering position, the sliding member 612 snaps into the recess 603, thereby preventing the sliding member 612 from moving further distally and preventing the working circuit from being turned on again.

Further, the sliding member 612 further includes a positioning block 6122, as shown in fig. 15, the positioning block 6122 is disposed outside the sliding member 612, and the distal side of the frame assembly 602 is further provided with a positioning structure, specifically, the positioning structure is a positioning barb 604; when the sliding member 612 slides to the triggering position and contacts with the trigger 211, the positioning barb 604 and the positioning block 6122 are fixed, so that the sliding member 612 and the frame assembly are fixed without relative displacement, and the working circuit is prevented from being conducted again.

As an alternative embodiment, as shown in fig. 17 and 18, the trigger mechanism 21 includes a trigger 311, and the trigger 311 includes a support 3110 having an opening, which is U-shaped, but may be V-shaped or have other shapes; conductor 3111 is disposed in the opening and is electrically connected to the operating circuitry. The conductor 3111 may be made of various types of conductive materials, such as: tin wire, copper wire, etc., but can also be conductive strips which are easy to break.

Further, as shown in fig. 20 and 21, similar to the sliding member 612, based on the basic structure of the sliding member 612, the sliding member 712 further includes a cut-out portion 7120, and when the sliding member 712 moves into contact with the trigger 311 of the trigger mechanism 21, the cut-out portion 7120 of the sliding member 712 is adapted to cut off the conductor 3111 to open the working circuit, thereby forming the trigger signal.

As an alternative embodiment, as shown in fig. 22-24, the trigger mechanism 21 includes a trigger 411, and the trigger 411 includes a support 4110 having an opening, which is U-shaped, but may be V-shaped or have other shapes; the elastic conductor 4111 is electrically connected to the working circuit, and the elastic conductor 4111 is a separable structure, for example, the elastic conductor 4111 includes two

elastic pieces

4111a and 4111b, which are symmetrically disposed in an opening of the supporting frame 4110.

Further, as shown in fig. 25 and 26, the sliding member 812 includes an abutting end 8120, and when the sliding member 812 moves into contact with the trigger 411 of the trigger mechanism 21, the abutting end 8120 of the sliding member 812 is operably disposed between the two

resilient tabs

4111a and 4111b of the resilient conductor 4111, such that the

resilient tabs

4111a and 4111b are separated to open the operating circuit, thereby forming the trigger signal.

In addition, the sliding member 812 further includes a positioning block 8122, the positioning block 8122 is disposed outside the sliding member 812, and a positioning structure is further disposed on the far side of the frame assembly 602, specifically, the positioning structure is a positioning barb 604; when the sliding member 812 slides to the triggering position and contacts with the trigger 211, the positioning barb 604 and the positioning block 8122 are fixed, so that the sliding member 812 and the frame assembly 602 are fixed without relative displacement, and the working circuit is prevented from being reconnected.

Meanwhile, an embodiment of the present invention also provides a loading unit 50 adapted to be detachably mounted on the elongated body 10 of the electric stapler 100, including: an end effector 70; a sleeve assembly 60 including a firing rod assembly 61, the firing rod assembly 61 being operable to reciprocate; and a trigger disposed on the firing rod assembly 61; and a trigger mechanism 21 cooperating with the trigger mechanism 21 to generate a trigger signal when the trigger moves with movement of at least a portion of the firing bar assembly 61.

Further, the trigger mechanism 21 of the loading unit 50 includes a first wire 210, and a trigger 211 is disposed at a distal end of the first wire 210, and cooperates with the trigger portion of the firing rod assembly 61 to generate a trigger signal.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. An electric stapler comprising:

a handle component (80),

a power unit (85), a drive system (89) and a control system (84) disposed within the handle assembly (80);

an elongate body (10) extending distally from a distal end of the handle assembly (80);

a loading unit (50) removably mounted at a distal end of the elongated body (10), the loading unit (50) including a firing rod assembly (61), the firing rod assembly (61) operably reciprocating under drive of the drive system (89);

characterized in that it further comprises a stroke control device (20), said stroke control device (20) comprising:

a trigger mechanism (21) provided in the loading unit (50), the trigger mechanism (21) being provided with a trigger (211);

a communication mechanism (22) in operative electrical connection with the control system (84) and the triggering mechanism (21), respectively;

the firing rod assembly (61) comprises a firing rod body (610) and a sliding member (612) which is slidably mounted on the firing rod body (610), wherein a trigger part is arranged on the sliding member (612); the trigger part is matched with the trigger (211) to generate a trigger signal when moving along with at least one part of the movement of the firing rod assembly (61), and the trigger signal is transmitted to the control system (84) through the communication mechanism (22);

the sliding member (612) includes: a fixing portion (6120), a connecting portion (6121) and a groove (6123); the connecting portion (6121) extends proximally from an end of the fixing portion (6120); the groove (6123) is arranged on the fixing part (6120), and the sliding component (612) is arranged on the firing rod body (610) through the groove (6123).

2. The electric stapler according to claim 1, wherein the trigger mechanism (21) further comprises a first wire (210), the trigger (211) being arranged at a distal end of the first wire (210); and a connection contact (212) disposed at a proximal end of the first wire (210), the connection contact (212) being operatively electrically connected to the communication mechanism (22).

3. The electric stapler according to claim 1 or 2, characterized in that said communication means (22) comprise: a second conductive line (220); and a connection plate (221) disposed at a distal end of the second wire (220), the connection plate (221) being in operable electrical connection with the trigger mechanism (21).

4. The electric stapler according to claim 3, characterized in that said communication means (22) further comprise: at least one elastic connector (222) provided on the connection plate (221), the elastic connector (222) being adapted to be operatively electrically connected with a connection contact (212) of the triggering mechanism (21).

5. Electric stapler according to claim 1 or 2, characterized in that said stroke control device (20) further comprises an electric connection board (23), said electric connection board (23) being electrically connected with a communication means (22) and with said control system (84), respectively.

6. The electric stapler of claim 1 or 2, wherein the firing rod assembly (61) further comprises: a firing bar connector (611) disposed at a proximal end of the firing bar body (610), the firing bar connector (611) adapted to detachably connect with a drive bar (893) of the drive system (89).

7. The powered stapler of claim 6, wherein the trigger is disposed on the firing bar connector (611).

8. The electric stapler according to claim 1 or 2, wherein a slide slot (613) is provided on said firing bar body (610), said slide member (612) being slidably mounted on said slide slot (613).

9. The powered stapler of claim 7, wherein the trigger (211) is a normally closed switch, and wherein movement of the firing bar connector (611) into abutment with the normally closed switch opens the normally closed switch to generate a trigger signal.

10. The electric stapler according to claim 1 or 2, wherein the trigger (211) is a normally closed switch, and the sliding member (612) opens the normally closed switch when moving into abutment with the normally closed switch, generating a trigger signal.

11. The electric stapler according to claim 1 or 2, wherein a recess (603) is further provided in the sleeve assembly (60), the trigger (211) being provided in the recess (603), the slide member (612) snapping into the recess (603) when the slide member (612) is moved to the trigger position.

12. The electric stapler according to claim 1 or 2, characterized in that said trigger (311) comprises: a support frame (3110) and a conductor (3111) disposed on the support frame (3110);

the sliding member (712) further comprises a cutting portion (7120), and when the sliding member (712) moves into contact with the conductor (3111), the cutting portion (7120) cuts the conductor (3111) and generates a trigger signal.

13. The electric stapler according to claim 1 or 2, characterized in that said trigger (411) comprises: a support frame (4110) and a resilient conductor (4111) disposed on the support frame (4110), the resilient conductor (4111) is a separable structure, and the sliding member (612) generates a trigger signal when moving against and separating the resilient conductor (4111).

14. A loading unit adapted to be removably mounted on an elongated body (10) of a powered stapler (100), characterized in that it comprises:

an end effector (70);

a sleeve assembly (60) including a firing rod assembly (61), the firing rod assembly (61) being operable to reciprocate; the firing rod assembly (61) comprises a firing rod body (610) and a sliding member (612) which is slidably mounted on the firing rod body (610), and a trigger part is arranged on the sliding member (612); the sliding member (612) includes: a fixing portion (6120), a connecting portion (6121) and a groove (6123); the connecting portion (6121) extends proximally from an end of the fixing portion (6120); the groove (6123) is arranged on the fixing part (6120), and the sliding component (612) is arranged on the firing rod body (610) through the groove (6123);

and a trigger mechanism (21) that cooperates with the trigger mechanism (21) to generate a trigger signal when the trigger moves with movement of at least a portion of the firing bar assembly (61).

15. The loading unit according to claim 14, wherein the trigger mechanism (21) comprises a first wire (210), a trigger (211) being provided at a distal end of the first wire (210) to cooperate with the trigger portion on the firing rod assembly (61) to generate a trigger signal.