Firing mechanism and electric anastomat

Abstract

The utility model provides a percussion mechanism and an electric anastomat. The percussion mechanism comprises an actuating assembly, a driving assembly and a driving assembly, the electric assembly comprises a motor, and the motor is configured to drive the actuating assembly to move in the far-end direction when being started to execute the first working mode and to drive the actuating assembly to move in the near-end direction when being started to execute the second working mode; the switch assembly comprises a first switch and a second switch, and the motor is started to execute a first working mode and a second working mode when the switch assembly is triggered; the handle comprises a first driving part and a second driving part, when the handle is located at the initial position, the handle is separated from the first switch and the second switch, when the handle is driven to the first position, the first driving part triggers the first switch, and when the handle is driven to the second position, the second driving part triggers the second switch. Different switches are triggered when the operating handle is located at different positions, the actuating assembly can be driven to advance and retreat, and use is convenient.

Description

Technical Field

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

[0002] In the prior art, an electric stapler includes a stapler body and a stapler head connected to the distal end of the stapler body, wherein the stapler body is provided with a firing mechanism that can drive the stapler head to sew and cut tissue. The electrification of the stapler is conducive to reducing the pulling of tissue during operation and improving the quality of stapler, and is therefore suitable for wide promotion and application.

[0003] The existing electric stapler uses a button to drive the firing mechanism. When using it, the operator presses the button to start the firing mechanism, which pushes out the stapler in the stapler head and staples it to the tissue, and drives the cutter to cut the tissue to achieve the firing of the stapler. However, this operation method has the following problems: (1) the operator is prone to press the button by mistake, resulting in misoperation; (2) the method of using a button to start the firing mechanism does not conform to the operator's long-term habit of using a handle to operate the stapler. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of the present application is to provide a firing mechanism and an electric stapler, which can drive the actuating assembly forward and backward respectively by triggering different switches when the operating handle is in different positions, and is easy to use.

[0005] The present application embodiment provides a firing mechanism, comprising:

[0006] an actuating assembly;

[0007] An electric assembly, comprising a motor, wherein the motor is configured to drive the actuating assembly to move toward the distal end of the stapler when the motor is activated to execute a first working mode, and to drive the actuating assembly to move toward the proximal end of the stapler when the motor is activated to execute a second working mode;

[0008] A switch assembly, comprising a first switch and a second switch, wherein the first switch starts the motor to execute the first working mode when triggered, and the second switch starts the motor to execute the second working mode when triggered;

[0009] The handle comprises a first driving part and a second driving part. When the handle is in an initial position, the handle is separated from the first switch and the second switch respectively. When the handle is driven to a first position, the first driving part triggers the first switch. When the handle is driven to a second position, the second driving part triggers the second switch.

[0010] In some embodiments, the handle includes a rotating connection portion, and the handle is configured to rotate from the initial position around the rotating connection portion in a first direction to reach the first position, and to rotate from the initial position around the rotating connection portion in a second direction to reach the second position, wherein the second direction is opposite to the first direction.

[0011] In some embodiments, the first driving portion and the second driving portion are respectively located on two longitudinal sides of the rotating connection portion.

[0012] In some embodiments, the switch assembly is disposed between the handle and the motor, the first switch is located on a side of the second switch away from the actuating assembly, and the first driving portion is located on a side of the second driving portion away from the actuating assembly.

[0013] In some embodiments, a first elastic component is further included, the first elastic component includes a first elastic member and a second elastic member, the first elastic member is arranged on the side of the first driving part facing the switch component, and the second elastic member is arranged on the side of the second driving part facing the switch component.

[0014] In some embodiments, the invention further comprises a second elastic component configured to provide a biasing force to the handle to keep the handle in the initial position.

[0015] In some embodiments, the switch assembly further includes a base, the first switch and the second switch are disposed on a side of the base facing the handle, and a circuit board is disposed in the base.

[0016] In some embodiments, a controller is further included, and the controller is connected to the circuit board and the motor respectively.

[0017] In some embodiments, the actuating assembly includes a rack, the electric assembly also includes a gear set, and the motor cooperates with the rack through the gear set. When the motor is started to execute the first working mode, the output shaft of the motor rotates along a third direction. When the motor is started to execute the second working mode, the output shaft of the motor rotates along a fourth direction, and the fourth direction is opposite to the third direction.

[0018] An embodiment of the present application also provides an electric stapler, comprising the above-mentioned firing mechanism.

[0019] The firing mechanism and electric stapler provided by the present application have the following advantages:

[0020] By adopting the present application, the handle can move from the initial position to the first position or the second position, corresponding to triggering the first switch or the second switch. When the first switch is triggered, the motor is started to drive the actuator assembly forward to fire the stapler. When the second switch is triggered, the motor is started to drive the actuator assembly back to complete the back movement. For the user, it is only necessary to operate the handle to put it in different positions to trigger different switches and thus realize the forward and backward movement of the actuator assembly, which is more in line with the operator's long-term habit of using the handle to operate the stapler, and is not prone to misoperation, making it safer and more convenient to use. 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 is a structural schematic diagram of a firing mechanism according to an embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of a firing mechanism according to an embodiment of the present application when the handle is in an initial position;

[0024] Figure 3 This is a schematic diagram of the structure of the rack and the electric component in accordance with an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of a handle and a first elastic component according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a handle in an embodiment of the present application being in a first position and cooperating with a switch assembly and a first elastic assembly;

[0027] Figure 6 It is a schematic diagram of the handle of one embodiment of the present application cooperating with the switch component and the first elastic component when the handle is in the second position.

[0028] Reference numerals:

[0029] 1 Rack 43 First drive unit

[0030] 2 Firing rod 44 Second driving part

[0031] 3 Electric assembly 45 convex column

[0032] 31 Motor 5 Switch assembly

[0033] 32 First gear 51 First switch

[0034] 33 Second gear 52 Second switch

[0035] 4 Handle 53 Base

[0036] 40 Initial position of the handle 6 First elastic component

[0037] 4a The first position of the handle 61 The first elastic member

[0038] 4b The second position of the handle 62 The second elastic member

[0039] 41 Operation part 7 Torsion spring

[0040] 42 Rotating connection DETAILED DESCRIPTION

[0041] 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.

[0042] The present application provides a firing mechanism and an electric stapler including the same. The electric stapler also includes a stapler body and a stapler head disposed at the distal end of the stapler. The firing mechanism includes an actuating assembly, an electric assembly, a switch assembly and a handle. The electric assembly includes a motor. The switch assembly includes a first switch and a second switch. The handle includes a first driving part and a second driving part. When the handle is in an initial position, the handle is separated from the first switch and the second switch respectively, the motor is not started and does not work, and the actuating assembly remains stationary.

[0043] When the handle is driven to the first position, the first drive unit triggers the first switch, and when the first switch is triggered, the motor is started to execute the first working mode, driving the actuating assembly to move toward the distal end of the stapler, thereby executing the firing of the stapler. When the handle is driven to the second position, the second drive unit triggers the second switch, and when the second switch is triggered, the motor is started to execute the second working mode, driving the actuating assembly to move toward the proximal end of the stapler, thereby causing the actuating assembly to retreat. At this time, the triggering of the first switch by the first drive unit and the triggering of the second switch by the second drive unit can be a direct trigger, that is, the first drive unit directly presses the first switch, and the second drive unit directly presses the second switch, or an indirect trigger, for example, the first drive unit presses the first switch through another component, and the second drive unit presses the second switch through another component. Therefore, the present application triggers different switches by operating the handle in different positions, and can drive the actuating assembly to move forward and backward respectively, which is convenient to use.

[0044] The structure of the firing mechanism of each specific embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present application. In the present application, the distal end and the proximal end are relative to the operator. The end closer to the operator is the proximal end, and the end farther from the operator, that is, the end closer to the surgical site is the distal end. The direction along the axis of the stapler is the axial direction, that is, the direction from the distal end to the proximal end of the stapler, or from the proximal end to the distal end of the stapler. For example, in Figure 1 In the perspective of , the left-right direction is the axial direction and the up-down direction is the longitudinal direction.

[0045] Figures 1 to 6 The structure of the firing mechanism of one embodiment of the present application is shown. Figures 1 to 3 As shown, the firing mechanism includes an actuating assembly, an electric assembly 3, a switch assembly 5 and a handle 4. The electric assembly 3 includes a motor 31. The brake assembly and the electric assembly 3 are arranged in a housing (not shown in the figure) of the stapler body. The actuating assembly includes a rack 1 and a firing rod 2, the proximal end of the firing rod 2 is connected to the distal end of the rack 1, and the firing rod 2 and the rack 1 both extend along the axial direction of the stapler. The distal end of the firing rod 2 is connected to a pusher rod (not shown in the figure). When the firing rod 2 moves in the distal direction, the pusher rod drives the cutter to move in the distal direction, drives the jaws of the nail head to close, and pushes the staples in the nail head outward to staple to the tissue, and the cutter cuts the tissue at the same time, so as to achieve the closing and firing of the stapler.

[0046] like Figure 1 and Figure 3As shown, the electric assembly 3 includes a motor 31 and a gear set, the gear set includes a first gear 32 and a second gear 33, and the output shaft of the motor 31 is matched with the rack 1 through the first gear 32 and the second gear 33 in sequence. The motor 31 can be started to perform a first working mode and a second working mode. When the motor 31 is started to perform the first working mode, the motor 31 rotates forward, and the output shaft of the motor 31 rotates along a third direction, and drives the firing rod 2 to move in the distal direction through the rack 1. When the motor 31 is started to perform the second working mode, the motor 31 rotates reversely, and the output shaft of the motor 31 rotates along a fourth direction, and drives the firing rod 2 to move in the proximal direction through the rack 1. The third direction and the fourth direction are opposite rotation directions.

[0047] like Figure 1 and Figure 2 As shown, the handle 4 includes an operating portion 41, a rotating connection portion 42, a first driving portion 43 and a second driving portion 44. The handle 4 is rotatably connected to the housing of the stapler body through the rotating operating portion 41, so that the handle 4 can rotate relative to the housing of the stapler body. For example, the rotating operating portion 41 can be installed on one side of the housing of the stapler body through a rotating shaft. Figure 1 The handle 4 is shown in three different positions. In the initial state, when the handle 4 is not subjected to external force, the handle 4 is in the initial position 40. The operator holds the operating portion 41 and presses the handle 4 inward, so that the handle 4 moves in a first direction ( Figure 1 The operator lifts the operating portion 41 outwards so that the handle 4 moves in the second direction ( Figure 1 The first driving part 43 and the second driving part 44 are respectively located on both sides of the longitudinal direction of the rotating connection part 42, and the first driving part 43 is located on the side of the second driving part 44 away from the actuating assembly (that is, the first driving part 43 is located below the second driving part 44).

[0048] like Figure 2 and Figure 4As shown, the switch assembly 5 is arranged between the handle 4 and the motor 31, and the switch assembly 5 includes a base 53, a first switch 51 and a second switch 52. The first switch 51 and the second switch 52 are arranged on the side of the base 53 facing the handle 4. The first switch 51 is located on the side of the second switch 52 away from the actuating assembly (that is, the first switch 51 is located below the second switch 52). The firing mechanism also includes a first elastic component 6. The first elastic component 6 includes a first elastic member 61 and a second elastic member 62. The first elastic member 61 and the second elastic member 62 are in the shape of spring sheets and are fixed by the protruding column 45 on the handle 4. The first elastic member 61 is arranged on the side of the first driving part 43 facing the switch assembly 5, and the second elastic member 62 is arranged on the side of the second driving part 44 facing the switch assembly 5.

[0049] The firing mechanism may also include a second elastic component configured to provide a biasing force to keep the handle 4 in the initial position. The second elastic component may include at least one torsion spring (only one torsion spring 7 is shown in the figure as an example), and the torsion spring is arranged on the rotating connection portion 42 of the handle 4. When the handle 4 rotates in the first direction or in the second direction, at least one torsion spring is twisted and deformed to provide a biasing force to return the handle 4 to the initial position. In another alternative embodiment, the second elastic component may include at least one compression spring and / or tension spring. When the handle 4 rotates in the first direction or in the second direction, the compression spring or tension spring is compressed and deformed or stretched to provide a biasing force to return the handle 4 to the initial position.

[0050] like Figure 2 As shown, when the handle 4 is in the initial position, the handle 4 and the first elastic component 6 are separated from the first switch 51 and the second switch 52 respectively, the motor 31 is not started and does not work, and the actuating component remains stationary. The first elastic member 61 and the second elastic member 62 of the first elastic component 6 are both in a free state without deformation.

[0051] like Figure 1 and Figure 5As shown, when the operator holds the operating part 41 of the handle 4 and drives the handle 4 to rotate in the first direction and move to the first position, the first driving part 43 approaches the first switch 51, triggers the first switch 51 through the first elastic member 61, and at the same time, the first driving part 43 drives the first elastic member 61 to deform so as to apply a triggering force of pressing to the first switch 51. The first elastic member 61 can buffer the action of the first driving part 43 triggering the first switch 51. When the force of the first elastic member 61 is sufficient to trigger the first switch 51, the first driving part 43 may not directly contact the first switch 51, or the handle 4 may continue to be held so that the first driving part 43 directly contacts and presses the first switch 51. The second driving part 44 and the second elastic member 62 are away from the second switch 52 and will not trigger the second switch 52, and the second elastic member 62 will not be deformed. When the first switch 51 is triggered, the motor 31 is started to execute the first working mode, driving the rack 1 and the firing rod 2 to move toward the distal end of the stapler, thereby executing the closing and firing of the stapler. At this time, the operator releases the handle 4, and the handle 4 can return to the initial position under the action of the elastic deformation restoring force of the second elastic component.

[0052] like Figure 1 and Figure 6 As shown, when the operator lifts the operating part 41 of the handle 4 outward and drives the handle 4 to rotate in the second direction and move to the second position, the second driving part 44 approaches the second switch 52, triggers the second switch 52 through the second elastic member 62, and at the same time, the second driving part 44 drives the second elastic member 62 to deform so as to apply a triggering force of pressing to the second switch 52. The second elastic member 62 can buffer the action of the second driving part 44 triggering the second switch 52. When the force of the second elastic member 62 is sufficient to trigger the second switch 52, the second driving part 44 may not directly contact the second switch 52, or the handle 4 may continue to be lifted so that the second driving part 44 directly contacts and presses the second switch 52. The first driving part 43 and the first elastic member 61 are away from the first switch 51 and will not trigger the first switch 51, and the first elastic member 61 will not deform. When the second switch 52 is triggered, the motor 31 is started to execute the second working mode, driving the rack 1 and the firing rod 2 to move toward the proximal end of the stapler, so that the rack 1 and the firing rod 2 retreat. At this time, the operator releases the handle 4, and the handle 4 can return to the initial position under the action of the elastic deformation restoring force of the second elastic component.

[0053] Therefore, the present application can respectively drive the actuator assembly forward and backward by triggering different switches when the operating handle 4 is in different positions; for the user, it is only necessary to operate the handle 4 in different positions to trigger different switches to realize the advancement and retreat of the actuator assembly, complete the closing, firing and resetting of the stapler, which is more in line with the operator's long-term habit of using the handle to operate the stapler, is not prone to misoperation, and is safer and more convenient to use.

[0054] In this embodiment, a circuit board is provided in the base 53, which is connected to the first switch 51 and the second switch 52 respectively. The first switch 51 and the second switch 52 are, for example, contact switches. When the first driving part 43 contacts the first switch 51, the first switch 51 is triggered. When the second driving part 44 contacts the second switch 52, the second switch 52 is triggered. The first switch 51 and the second switch 52 may also be proximity switches. When the distance between the first driving part 43 and the first switch 51 is within a preset distance range, the first switch 51 can be triggered. When the distance between the second driving part 44 and the second switch 52 is within a preset distance range, the second switch 52 can be triggered. A signal output circuit is provided on the circuit board. When the first switch 51 is triggered, the signal output circuit outputs a first level signal to the motor 31 to drive the motor 31 to rotate forward. When the second switch 52 is triggered, the signal output circuit outputs a second level signal to the motor 31 to drive the motor 31 to rotate reversely. In this embodiment, the signal output circuit can directly send the first level signal or the second level signal to the motor, or the firing mechanism can also include a controller, the controller is connected to the circuit board and the motor 31 respectively, the signal output circuit of the circuit board sends the first level signal or the second level signal to the controller, the controller starts the motor 31 to rotate forward when receiving the first level signal, and starts the motor 31 to rotate reversely when receiving the second level signal. The signal output circuit, for example, includes a current loop and at least one load, the current loop is provided with an output node to output the level signal, the loads are, for example, components such as resistors, inductors, capacitors, etc., and when the first switch 51 and the second switch 52 are triggered, different loads can be controlled to be connected to the current loop, thereby changing the level signal at the output node position.

[0055] 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 firing mechanism, characterized in that: For an electric stapler, the firing mechanism comprises: an actuating assembly; An electric assembly, comprising a motor, wherein the motor is configured to drive the actuating assembly to move toward the distal end of the stapler when the motor is activated to execute a first working mode, and to drive the actuating assembly to move toward the proximal end of the stapler when the motor is activated to execute a second working mode; A switch assembly, comprising a first switch and a second switch, wherein the first switch starts the motor to execute the first working mode when triggered, and the second switch starts the motor to execute the second working mode when triggered; The handle comprises a first driving part and a second driving part. When the handle is in an initial position, the handle is separated from the first switch and the second switch respectively. When the handle is driven to a first position, the first driving part triggers the first switch. When the handle is driven to a second position, the second driving part triggers the second switch.

2. The firing mechanism according to claim 1, characterized in that: The handle includes a rotation connection portion, and the handle is configured to rotate from the initial position around the rotation connection portion in a first direction to reach the first position, and to rotate from the initial position around the rotation connection portion in a second direction to reach the second position, the second direction being opposite to the first direction.

3. The firing mechanism according to claim 2, characterized in that: The first driving part and the second driving part are respectively located on two longitudinal sides of the rotating connection part.

4. The firing mechanism according to claim 3, characterized in that: The switch assembly is arranged between the handle and the motor, the first switch is located on a side of the second switch away from the actuating assembly, and the first driving part is located on a side of the second driving part away from the actuating assembly.

5. The firing mechanism according to claim 1, characterized in that: It also includes a first elastic component, which includes a first elastic member and a second elastic member. The first elastic member is arranged on a side of the first driving part facing the switch component, and the second elastic member is arranged on a side of the second driving part facing the switch component.

6. The firing mechanism according to claim 5, characterized in that: Also included is a second elastic component configured to provide a biasing force to the handle to keep it in the initial position.

7. The firing mechanism according to claim 1, characterized in that: The switch assembly further comprises a base, the first switch and the second switch are arranged on a side of the base facing the handle, and a circuit board is arranged in the base.

8. The firing mechanism according to claim 7, characterized in that: It also includes a controller, which is connected to the circuit board and the motor respectively.

9. The firing mechanism according to claim 1, characterized in that: The actuating assembly includes a rack, and the electric assembly also includes a gear set. The motor cooperates with the rack through the gear set. When the motor is started to execute the first working mode, the output shaft of the motor rotates along a third direction. When the motor is started to execute the second working mode, the output shaft of the motor rotates along a fourth direction, and the fourth direction is opposite to the third direction.

10. An electric stapler, characterized in that: Comprising the firing mechanism according to any one of claims 1 to 9.

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