Anastomat toggle type switch switching structure, active stopping structure and anastomat

Abstract

The utility model relates to the technical field of anastomats, in particular to an anastomat toggle type switch switching structure, an active stopping structure and an anastomat. A toggle type switch switching structure of an anastomat comprises a percussion rack provided with a first sliding groove with a front inner wall and a rear inner wall; the first change-over switch is provided with a first change-over contact; the first switching triggering piece is provided with a first triggering part adjacent to the first switching contact and a first shifting part inserted into the first sliding groove; the first shifting part is propped against the front inner wall, so that the first switching triggering piece deflects towards the direction in which the first triggering part is close to the first switching contact; and the first shifting part is also propped against the rear inner wall, so that the first switching triggering piece deflects towards the direction in which the first triggering part is far away from the first switching contact. According to the scheme, on the premise that the complexity of the instrument is not increased, high-precision detection and control over the stroke of the percussion rack are achieved, the requirements for multi-step operation and high-frequency use of the anastomat are met, and then the safety and operation efficiency of the instrument are improved.

Description

Technical Field

[0001] This utility model relates to the field of anastomosis device technology, and in particular to an anastomosis device toggle switch switching structure, an active stop structure, and an anastomosis device. Background Technology

[0002] In minimally invasive surgery, electric staplers typically use a motor to drive a rack in reciprocating motion to perform stapleing, cutting, or retraction operations on tissue. To detect and switch control states at different locations, a toggle mechanism or triggering device is often installed on the rack or related components to link with a switch, thereby completing multiple steps.

[0003] In the prior art, some electric staplers have attempted to incorporate grooves near the rack and utilize the mechanical contact between a toggle component and a switch to trigger or release a signal as the rack moves. For example, Chinese patent CN111202553B discloses a manual retraction device for an electric stapler and the electric stapler thereof, mentioning that by setting a manual retraction structure in the electric stapler, the operator can toggle the relevant components when needed to complete the retraction or switching function.

[0004] However, when electric staplers need to meet the requirements of high-frequency use, rapid switching and stable reset, how to ensure the precise movement and durability of the actuating components while keeping the structure compact remains a challenge in this field. Utility Model Content

[0005] The purpose of this invention is to provide a toggle switch switching structure, an active stop structure, and a stapler to address the shortcomings of existing technologies. The aim is to achieve high-precision detection and control of the firing rack stroke without increasing the complexity of the instrument, thus meeting the needs of multi-step operation and high-frequency use of electric staplers.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a toggle switch structure for an anastomosis device, comprising:

[0007] A rack is fired, and a first groove with a front inner wall and a rear inner wall is provided.

[0008] A first switching switch, having a first switching contact; and

[0009] The first switching trigger is movably connected to the stapler and is provided with a first trigger part adjacent to the first switching contact and a first toggle part inserted into the first slide groove;

[0010] The first toggle part is abutted by the front inner wall, so that the first switching trigger piece is deflected towards the first trigger part and the first switching contact. The first trigger part and the first switching contact are in contact by the first toggle part being abutted by the front inner wall, so that the first switching trigger piece is deflected. The first trigger part and the first switching contact are disconnected by the first toggle part being abutted by the rear inner wall, so that the first switching trigger piece is deflected in the opposite direction. Specifically, the first switching trigger piece is deflected in the first direction by the first toggle part being abutted by the front inner wall, so that the first trigger part of the first switching trigger piece and the first switching contact of the first switching switch are in contact, thereby triggering the first switching switch to switch from the conduction of the common terminal and the normally closed terminal to the conduction of the common terminal and the normally open terminal. The first switching trigger piece is deflected in the opposite direction of the first direction by the first toggle part being abutted by the rear inner wall, so that the first trigger part of the first switching trigger piece is away from and disconnected from the first switching contact of the first switching switch.

[0011] 2. Further, the first switching trigger piece is further provided with a hinge part for movably mounting the first switching trigger piece on the anastomat. Specifically, the first switching trigger piece is deflected based on the hinge part as the pivot. The hinge part is a hinge hole, and the hinge is inserted by the mounting shaft of the mounting frame.

[0012] 3. Further, the hinge part is arranged on the side of the first switching trigger piece close to the first toggle part, and the first trigger part is arranged on the side of the first switching trigger piece away from the first toggle part.

[0013] 4. Further, one end of the firing rack is provided with a first avoidance position, and the anastomat toggle switch switching structure further comprises:

[0014] a second switching trigger piece obliquely arranged in the first avoidance position and provided with a second trigger part on one side; and

[0015] a second switching switch arranged adjacent to the second trigger part and provided with a second first switching contact closely adjacent to the second trigger part and contacted by the second trigger part.

[0016] 5. Further, the anastomat toggle switch switching structure further comprises:

[0017] a current-limiting on-off switch provided with a current-limiting on-off contact;

[0018] a current-limiting on-off trigger piece provided with a current-limiting trigger part closely adjacent to the current-limiting on-off contact, and a current-limiting receiving part into the first sliding groove and abutted by the front inner wall to rotate, so that the current-limiting trigger part is in contact with the current-limiting on-off contact; and

[0019] The current-limiting reset knob is connected to the current-limiting on-off trigger at one end and is used to receive manual force to rotate the current-limiting on-off trigger to reset, so that the current-limiting trigger part is separated from the current-limiting on-off contact, and the current-limiting receiving part is re-dialled into the first sliding groove.

[0020] 6. The active stop structure of the anastomat, comprising the anastomat dial switch structure according to any one of the preceding claims, further comprising an active stop knob provided with a second sliding groove, used to manually push the first switch trigger to deflect.

[0021] The first switch trigger is further provided with a second dial part inserted into the second sliding groove.

[0022] 7. Further, the second dial part is provided with a position-avoiding notch on one side close to the active stop knob. Specifically, the active stop knob is advanced and retreated, and the second dial part of the first switch trigger is dialled to deflect the first switch trigger to turn on and off the first switch.

[0023] 8. The anastomat, comprising the anastomat dial switch structure according to any one of the preceding claims, further comprising:

[0024] a firing motor, used to drive the firing rack to advance and retreat;

[0025] a firing rod, connected to one end of the firing rack close to the first position-avoiding part and driven by the firing rack to advance and retreat; and

[0026] a main body, wherein the firing motor, the firing rod and the firing rack are all installed in the main body, and the main body is provided with a mounting rack, and the first switch trigger is hinged to the mounting rack;

[0027] The first switch trigger is provided with a limiting protrusion, and the mounting rack is provided with a limiting groove into which the limiting protrusion is clamped; and the mounting rack is further provided with a mounting shaft hinged to the hinged part of the first switch trigger.

[0028] 9. The active stop anastomat, comprising the active stop structure of the anastomat according to any one of the preceding claims, further comprising:

[0029] a firing motor, used to drive the firing rack to advance and retreat;

[0030] a firing rod, connected to one end of the firing rack close to the first position-avoiding part and driven by the firing rack to advance and retreat;

[0031] a main body, wherein the firing motor, the firing rod and the firing rack are all installed on the main body; the first switch trigger is hinged to the main body; and the active stop knob is movably installed on the main body and can translate along the length direction of the first sliding groove and / or the second sliding groove.

[0032] 10. Further, the main body is provided with a guide groove rail, and the active stop knob is provided with a third sliding groove inserted by the guide groove rail.

[0033] The utility model discloses the beneficial effects of:

[0034] By setting the first sliding groove of the front inner wall and the rear inner wall on the firing rack, and cooperating with the first switching trigger (including the dialing part and the trigger part) and the first switching switch, the following effects can be realized when the rack reciprocates:

[0035] 1. Precise triggering by bidirectional abutting. The front inner wall and the rear inner wall abut the dialing part respectively, so that the first switching trigger is deflected towards the direction of "approaching" or "moving away" from the first switching contact point, realizing the connection or disconnection of the switch in different stroke stages, and enhancing the accurate detection of the rack position.

[0036] 2. High frequency durability under compact design. The first dialing part is closely attached to the inner wall of the first sliding groove, the action is simple and occupies small space, and is suitable for arrangement in the narrow environment inside the electric anastomat. Stable deflection can be maintained under multiple reciprocating movements, wear is reduced, and the overall service life is prolonged.

[0037] 3. Easy integration with other functional units. The dialing type switch switching structure can work cooperatively with the current-limiting on-off switch, the active stop knob and other components, provides stroke signals or trigger points for more safety or control requirements, and improves the functional expandability of the electric anastomat.

[0038] Through the above design, high-precision detection and control of the firing rack stroke are realized without increasing the complexity of the instrument, the multi-step operation and high-frequency use requirements of the electric anastomat are met, and the safety and operation efficiency of the instrument are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a circuit schematic diagram of the initial state of the motor control circuit.

[0040] Figure 2 It is a circuit schematic diagram of the firing current-limiting state of the motor control circuit.

[0041] Figure 3 It is a circuit schematic diagram of the full-power firing state of the motor control circuit.

[0042] Figure 4 It is a circuit schematic diagram of the firing-to-bottom state of the motor control circuit.

[0043] Figure 5 It is a circuit schematic diagram of the initial state of the motor control circuit.

[0044] Figure 6Circuit schematic diagram for the back-off post-state of the motor control circuit.

[0045] Figure 7 Circuit schematic diagram for the back-off to bottom state of the motor control circuit.

[0046] Figure 8 Circuit schematic diagram for the reset state of the motor control circuit.

[0047] Figure 9 Circuit schematic diagram for the active back-off state during the firing process of the motor control circuit.

[0048] Figure 10 Circuit schematic diagram for the motor control circuit in the manual back-off process with the safety cover open.

[0049] Figure 11 Structure exploded view and local structure enlarged view of the anastomat switching switch structure.

[0050] Figure 12 Structure schematic diagram of the anastomat switching switch structure in two switching states.

[0051] Figure 13 Structure schematic diagram of the anastomat switching switch structure in two switching states.

[0052] Figure 14 Structure exploded view and local structure enlarged view of the anastomat switching switch structure.

[0053] Figure 15 Structure schematic diagram of the anastomat in the anastomosis and firing states, between the anastomosis handle, the firing handle and the third switching switch.

[0054] Figure 16 Structure exploded view and local structure enlarged view of the first switching trigger and the mounting frame.

[0055] Figure 17 Local structure schematic diagram of the first switching trigger in two states.

[0056] Figure 18 Structure exploded view and structure schematic diagram of the current-limiting on-off switch in the non-disassembled state.

[0057] Figure 19 Structure schematic diagram of a part of the structure.

[0058] Figure 20 Structure schematic diagram of the anastomat active back-off structure in two states.

[0059] Figure 21These are schematic diagrams and enlarged partial structural diagrams of the firing wheel and driven return wheel of the present invention from two different perspectives.

[0060] Figure 22 This is a structural schematic diagram of another part of the present invention.

[0061] Figure 23 This is an enlarged schematic diagram of the overall structure and some parts of the present invention.

[0062] Figure 24 This is a schematic diagram of the connection structure between the active retraction wheel and the circuit board of the present invention.

[0063] Figure 25 This is a schematic diagram of the manual retraction process of the stapler of the present invention.

[0064] Figure 26 This is a schematic diagram of the toggle switch switching structure of the anastomosis device of the present invention.

[0065] Figure 27 for Figure 26 A structural diagram of Figure A from another perspective.

[0066] Figure 28 This is a schematic diagram of the anastomosis device toggle switch switching structure of the present invention after it has been installed in the mounting bracket. Detailed Implementation

[0067] like Figures 1-10 As shown, a motor control circuit includes a generator 6, a current limiting protection unit, and multiple switching switches. The switching switches include a first switching switch SW1, a second switching switch SW2, a third switching switch SW3, and a fourth switching switch SW0. Each switching switch has a common terminal, a first switching terminal, and a second switching terminal, wherein the first switching terminal is a normally open terminal and the second switching terminal is a normally closed terminal.

[0068] The current limiting protection unit includes a current limiting element, a thermistor, and a current limiting switch 4 connected in series. The current limiting element is a current limiting resistor R, the thermistor is a thermistor PTC, and the current limiting switch 4 has a first terminal S4-1 and a second terminal S4-2. The first terminal S4-1 and the second terminal S4-2 can be switched on and off. The second terminal S4-2 is electrically connected to one end of the current limiting resistor R, and one end of the thermistor PTC is electrically connected to the other end of the current limiting resistor R.

[0069] The third switching switch SW3 has its common terminal connected to the negative terminal of the generator 6, its normally open terminal connected to the other end of the thermistor PTC, and its normally closed terminal connected to the negative terminal of the power supply.

[0070] The second switch SW2 has its common terminal connected to the normally closed terminal of the fourth switch SW0, its normally open terminal connected to the normally open terminal of the third switch SW3, and its normally closed terminal connected to the first terminal S4-1.

[0071] The first switch SW1 has its common terminal connected to the positive terminal of the firing motor 6, its normally open terminal connected to the normally closed terminal of the fourth switch SW0, and its normally closed terminal connected to the negative terminal of the power supply.

[0072] The fourth switch SW0 has its common terminal connected to the positive terminal of the power supply, and its normally open terminal is vacant.

[0073] Further, the motor control circuit is further connected in parallel with an indicator light module. Specifically, one end of the indicator light module is electrically connected to the normally closed terminal of the fourth switch SW0, and the other end of the indicator light module is connected to the normally closed terminal of the first switch SW1 and / or the negative terminal of the power supply.

[0074] It should be noted that the motor control circuit can be used in the field of anastomat and other fields with motors.

[0075] An anastomat switch structure, as shown in Figure 11 , Figure 12 includes a firing rack 5, a second switch trigger 22, and a second switch SW2. Wherein:

[0076] The firing rack 5 has a first avoiding position 52 at one end.

[0077] The second switch trigger 22 is obliquely placed in the first avoiding position 52 and has a second trigger part 221 at one side.

[0078] The second switch SW2 is adjacent to the second trigger part 221 and has a second switch contact 21 adjacent to the second trigger part 221 and contacted by the second trigger part 221.

[0079] Further, the second switch SW2 has a plug interface 201 at one side, the second switch trigger 22 has a plug pin 222 tightly fitted / loosely fitted into the plug interface 201, and the second switch trigger 22 is a resilient component having a certain elastic deformation performance, which is used to generate elastic deformation when the second switch trigger 22 is separated from the first avoiding position 52, so that the second switch trigger 22 is reset to be obliquely placed in the first avoiding position 52 when the bottom of the second switch trigger 22 is adjacent to the first avoiding position 52, and then the second trigger part 221 and the second switch contact 21 of the second switch SW2 are separated.

[0080] Further, the second trigger part 221 of the second switch trigger 22 is in contact with the second switch contact 21 of the second switch SW2 by the elastic deformation of the bottom of the second switch trigger 22, which ensures that the second switch SW2 is always pressed. One side of the firing rack 5 is provided with a guide surface 54 which is in contact with the bottom of the second switch trigger 22 and extends to the first avoiding position 52. When the second switch trigger 22 is placed in the first avoiding position 52, the second trigger part 221 is separated from the second switch contact 21 of the second switch SW2. When the bottom of the second switch trigger 22 is separated from the first avoiding position 52 and in contact with the guide surface 54, the second trigger part 221 is in contact with the second switch contact 21 of the second switch SW2. Specifically, the sharp corner formed between the guide surface 54 and the guide slope 53 of the first avoiding position 52 abuts against the bottom of the second switch trigger 22. Since the installation wall of the second switch trigger 22 is tightly or loosely fixed to the second switch SW2 by the latch 222, the bottom of the second switch trigger 22 is elastically twisted by the abutment of the sharp corner, so that the second trigger part 221 of the second switch trigger 22 abuts against the second switch contact 21 of the second switch SW2, realizing the switching of the second switch SW2, i.e. switching the conduction of the second switch SW2 from the common terminal and the normally closed terminal to the common terminal and the normally open terminal.

[0081] A switch switching structure of an anastomat, comprising: Figures 26-28 an installation frame 8, a firing rack 5, a second trigger switch 23, and a second switch SW2. The installation frame 8 is formed with a guide sliding groove 87. The firing rack 5 is provided with a second avoiding position 55. The second trigger switch 23 comprises a guide connecting part 231 inserted into the guide sliding groove 87 and a second contact part 232 integrally formed with the guide connecting part 231 and accommodated by the second avoiding position 55. The second switch SW2 is adjacent to the second contact part 232 and is provided with a second switch contact 21 which is close to the second contact part 232 and in contact with the second contact part 232. The firing rack 5 is provided with a guide surface 54. The second avoiding position 55 is arranged at one end of the guide surface 54. A guide slope 53 is arranged between the second avoiding position 55 and the guide surface 54. Figure 26 Before firing, the second contact part 232 is separated from the second switch contact 21. During firing, the firing rack 5 advances, the second contact part 232 of the second trigger switch 23 is lifted, the guide connecting part 231 rises along the guide sliding groove 87, the second contact part 232 is separated from the second avoiding position 55, and the second contact part 232 is in contact with the second switch contact 21, as shown in FIG. B of Figure 26 , realizing the switching of the switch.

[0082] A switch switching structure of an anastomat, comprising:Figure 13 、 Figure 14 As shown in FIG. 1, the anastomat comprises a firing rack 5, a first switching switch SW1 and a first switching trigger 12. Wherein:

[0083] The firing rack 5 is provided with a first sliding slot 51 having a front inner wall 511 and a rear inner wall 512;

[0084] The first switching switch SW1 is provided with a first switching contact 11;

[0085] The first switching trigger 12 is movably connected to the anastomat, and is provided with a first trigger portion 121 adjacent to the first switching contact 11, and a first actuating portion 122 inserted into the first sliding slot 51;

[0086] One side of the first actuating portion 122 is abutted by the front inner wall 511 to deflect the first switching trigger 12 towards the first trigger portion 121 to the direction of approaching the first switching contact 11; the other side of the first actuating portion 122 is abutted by the rear inner wall 512 to deflect the first switching trigger 12 towards the first trigger portion 121 to the direction of away from the first switching contact 11. Wherein, the contact between the first trigger portion 121 and the first switching contact 11 is realized by abutting the first actuating portion 122 by the front inner wall 511 to deflect the first switching trigger 12. The disconnection between the first trigger portion 121 and the first switching contact 11 is realized by abutting the first actuating portion 122 by the rear inner wall 512 to deflect the first switching trigger 12 in the opposite direction. Specifically, the first switching trigger 12 is abutted by the first actuating portion 122 by the front inner wall 511 to deflect in the first direction, so that the first trigger portion 121 of the first switching trigger 12 contacts the first switching contact 11 of the first switching switch SW1, and further triggers the first switching switch SW1 to switch from the conduction of the common terminal and the normally closed terminal to the conduction of the common terminal and the normally open terminal. The first switching trigger 12 is abutted by the first actuating portion 122 by the rear inner wall 512 to deflect in the opposite direction of the first direction, so that the first trigger portion 121 of the first switching trigger 12 is away from and disconnected from the first switching contact 11 of the first switching switch SW1.

[0087] Further, the first switching trigger 12 is further provided with a hinged portion 123 for movably mounting the first switching trigger 12 on the anastomat. Specifically, the first switching trigger 12 deflects based on the hinged portion 123 as the pivot. The hinged portion 123 is a hinged hole, and the mounting shaft 86 of the mounting frame 8 is inserted into the hinged hole.

[0088] Further, as shown in FIG. 1, Figure 18 、 Figure 19 、 Figure 22 The anastomat further comprises a current-limiting on-off switch 4, a current-limiting on-off trigger 42 and a current-limiting reset knob 43. Wherein:

[0089] The current-limiting on-off switch 4 is provided with a current-limiting on-off contact 41;

[0090] The current-limiting on-off trigger 42 is provided with a current-limiting trigger part 421 which is adjacent to the current-limiting on-off contact 41, and a first sliding groove 51 which extends into the firing rack 5 and is stopped by the front inner wall 511 to rotate, so that the current-limiting trigger part 421 is in contact with the current-limiting on-off contact 41.

[0091] The current-limiting reset knob 43 is connected to the current-limiting on-off trigger 42 at one end, and is used to receive manual force to rotate the current-limiting on-off trigger 42 to reset, so that the current-limiting trigger part 421 is separated from the current-limiting on-off contact 41, and the current-limiting trigger part 421 is reset into the first sliding groove 51. Specifically, the first end S4-1 of the current-limiting on-off switch 4 is arranged on the current-limiting on-off contact 41, and the second end S4-2 is arranged on the current-limiting trigger part 421; or the first end S4-1 is arranged on the current-limiting trigger part 421, and the second end S4-2 is arranged on the current-limiting on-off contact 41. In detail, see Figures 1-10 , the current-limiting on-off switch 4 is in a conductive state in the state of being ready to fire; after firing, the front inner wall 511 of the firing rack 5 stops the current-limiting on-off trigger part 421, so that the current-limiting on-off trigger 42 is deflected to disconnect the current-limiting trigger part 421 and the current-limiting on-off contact 41, thereby disconnecting the current-limiting on-off switch 4 and making the current-limiting protection unit open circuit. After the firing is completed and the firing rack 5 is retracted to the bottom, the current-limiting on-off switch 4 is still in a disconnected state and cannot be automatically reset, so the stapler cannot be fired again and the current-limiting reset knob 43 must be manually rotated to rotate the current-limiting on-off trigger 42 to completely reset. In this way, the current-limiting on-off switch 4 can effectively prevent misfiring, and at the same time, can effectively remind the operating physician that the stapler has been fired and a new staple cartridge assembly 82 must be replaced, and the current-limiting on-off switch 4 must be reset manually before the stapler can be fired again, thereby effectively avoiding the situation of performing an empty staple cartridge stapling and cutting on a staple cartridge assembly 82 that has already been used, and the safety factor is higher.

[0092] Further, see Figure 14 , the first switching trigger 12 is provided with a limiting protrusion 124. See Figure 16 , the mounting frame 8 is provided with a limiting protrusion slot 85 into which the limiting protrusion 124 is clamped; the mounting frame 8 is further provided with a mounting shaft 86 which is hinged by the hinge part 123 of the first switching trigger 12. In detail, see Figure 14 , Figure 16 and Figure 17 , the limiting protrusion 124 is provided with two limiting protrusions 124a and 124b; the limiting protrusion slot 85 is provided with three limiting protrusion slots 85a, 85b and 85c. Before the stapler is fired, the first trigger part 121 of the first switching trigger 12 is separated from the first switching contact 11 of the first switching switch SW1, at this time seeFigure 16 and Figure 17 A figure, the convex point 124a and the convex point 124b are respectively clamped into the convex slot 85a and the convex slot 85b, so that the firing rack 5 keeps the first switching trigger 12 stable during the firing process, so that the first trigger part 121 and the first switching contact 11 are always separated, avoiding the first switching trigger 12 from running out of position and causing poor contact, that is Figures 1-3 , the first switching switch SW1 always maintains the state of 1-3 conduction, 1-2 disconnection. Until the firing rack 5 is fired to the bottom, the front inner wall 511 of the first sliding groove 51 pushes the first switching trigger 12 to deflect, at this time see Figure 17 B figure, the convex point 124a and the convex point 124b are respectively clamped into the convex slot 85b and the convex slot 85c, so that the first trigger part 121 and the first switching contact 11 are always in contact during the subsequent retreat process of the firing rack 5, that is Figures 4-6 , the first switching switch SW1 always maintains the state of 1-2 conduction, 1-3 disconnection, until the firing rack 5 retreats to the bottom, so that the rear inner wall 512 of the first sliding groove 51 pushes the first switching trigger 12 to deflect and reset.

[0093] An anastomat active stop structure, comprising the anastomat push switch switching structure of any one of the preceding description, further comprising an active stop push button 67 provided with a second sliding groove 671, for manually pushing the first switching trigger 12 to deflect; The first switching trigger 12 is also provided with a second push part 125 inserted into the second sliding groove 671. The second push part 125 is provided with a position avoidance gap 125a on the side close to the active stop push button 67. Specifically, the active stop push button 67 advances and retreats, and the second push part 125 of the first switching trigger 12 is pushed to make the first switching trigger 12 rotate, so as to turn on and off the first switching switch SW1.

[0094] An anastomat active retreat structure, as shown in Figures 19-23 , comprising a firing motor 6, a firing rack 5, and a firing wheel 62 engaged with the firing motor 6 and the firing rack 5 respectively; further comprising: a driven retreat wheel 63 and an active retreat wheel 64. The driven retreat wheel 63 is engaged with the firing rack 5. The active retreat wheel 64 is engaged with the driven retreat wheel 63, and the active retreat wheel 64 is provided with a first limiting force part 641 which is externally forced to rotate the active retreat wheel 64.

[0095] Further, the anastomat active return structure further comprises a guide shaft 65, the driven return wheel 63 and the firing wheel 62 are coaxially connected to the guide shaft 65. The driven return wheel 63 and the firing wheel 62 are movably connected to the guide shaft 65 and can slide along the length direction of the guide shaft 65. Further, the anastomat active return structure further comprises an elastic member 66 sleeved on the guide shaft 65, the elastic member 66 exerts elastic force on the end of the firing wheel 62 away from the driven return wheel 63. Further, the anastomat active return structure further comprises a wrench 7 for rotating the active return wheel 64, the wrench 7 is provided with a second limiting force applying part 71 matched with the first limiting force applying part 641, so that the active return wheel 64 is applied force by the wrench 7. The first limiting force applying part 641 is a force applying shaft, and the second limiting force applying part 71 is a limiting connecting port. The force applying shaft is provided with external threads, and the limiting connecting port is provided with internal threads matched with the external threads. The wrench 7 is provided with a pressing part 72, and the top of the driven return wheel 63 is provided with a pressure receiving part 632 abutted by the pressing part 72; the wrench 7 is further used for pressing the driven return wheel 63 and the firing wheel 62 below the pressure receiving part 632 by the pressing part 72. The body of the anastomat is provided with a detachable safety cover plate 81, the safety cover plate 81 is located at the top of the first limiting force applying part 641, and opening the safety cover plate 81 can expose the first limiting force applying part 641 of the active return wheel 64, so that the wrench 7 can be connected and manually apply force and rotate the active return wheel 64.

[0096] In addition, as shown in Figure 24 , the anastomat further comprises a circuit board 88, the circuit board 88 is provided with a shaft connecting port 881, and the first limiting force applying part 641 of the active return wheel 64 is inserted into the shaft connecting port 881 of the circuit board 88, so that the active return wheel 64 can be installed on the circuit board 88 and can rotate relative to the circuit board 88. In the actual manual return process, the wrench 7 is screwed to the bottom of the first limiting force applying part 641 until the active return wheel 64 is slightly tensioned with the circuit board 88, and then the active return wheel 64 can be rotated by the wrench 7. In addition, the active return wheel 64 can also be movably arranged in the circuit board 88 by arranging a bearing. The active return step is shown in Figure 25 , the safety cover plate 81 is opened in A, the wrench 7 is screwed into the firing gear 5 to separate the firing motor 6 from the firing rack 5 in B, and the wrench 7 is screwed to the bottom in the clockwise direction, and the anastomat jaw can be opened by pressing the reset button in C.

[0097] A one-way transmission type anastomat, as shown in Figures 19-23 , comprises a firing motor 6, a firing rack 5, and a firing wheel 62; further comprising a driven return wheel 63, an active return wheel 64, a wrench 7, a guide shaft 65, and an elastic member 66. Wherein:

[0098] The firing wheel 62 is movably connected with the firing motor 6 and the firing rack 5;

[0099] The driven return wheel 63 is coaxially connected to the firing wheel 62 and is adjacent to the firing wheel 62. A first misaligned joint 631 is provided on one end face near the firing wheel 62.

[0100] The active return wheel 64 is meshed with the driven return wheel 63;

[0101] Wrench 7 is used to rotate the active return wheel 64 and press down the driven return wheel 63;

[0102] The guide shaft 65 is coaxially mounted on the firing wheel 62 and the driven return wheel 63, respectively, so that the firing wheel 62 and the driven return wheel 63 can slide on the guide shaft 65;

[0103] The elastic element 66 is sleeved on the guide shaft 65 and acts on the firing wheel 62, so that the firing wheel 62 is maintained on the guide shaft 65 in a predetermined position that can mesh with the firing rack 5, and provides a restoring force for the firing wheel 62 when the firing wheel 62 is pressed down.

[0104] Among them, the firing wheel 62 is provided with a second misaligned engagement portion 621 on one end face near the driven return wheel 63, which is engaged by the first misaligned engagement portion 631, so that the teeth of the firing wheel 62 are misaligned with the teeth of the driven return wheel 63.

[0105] Furthermore, such as Figure 21 As shown in Figures A and B, the first misaligned joint 631 is a misaligned protrusion 631a, and the second misaligned joint 621 is a misaligned groove 621a. When the misaligned protrusion 631a engages with the misaligned groove 621a, the teeth of the firing wheel 62 and the teeth of the driven return wheel 63 are misaligned. One end of the misaligned protrusion 631a is provided with a first one-way limiting surface 631a1, and the other end is provided with a first one-way guiding inclined surface 631a2. One end of the misaligned groove 621a is provided with a second one-way limiting surface 621a1 abutted by the first one-way limiting surface 631a1, and the other end is provided with a second one-way guiding inclined surface 621a2 abutted by the first one-way guiding inclined surface 631a2. This allows for the following: when the misalignment protrusion 631a engages with the misalignment groove 621a, and the driven return wheel 63 rotates clockwise in the direction of the forward movement of the firing rack 5, the driven return wheel 63 and the firing wheel 62 rotate synchronously; while when the misalignment protrusion 631a engages with the misalignment groove 621a, and the driven return wheel 63 rotates counterclockwise in the direction of the retraction of the firing rack 5, the driven return wheel 63 and the firing wheel 62 can rotate relative to each other. If the firing wheel 62 remains stationary while the driven return wheel 63 rotates, unidirectional transmission is achieved.

[0106] Further, the top of the active back-off wheel 64 is provided with a first limiting force applying part 641; the wrench 7 is provided with a second limiting force applying part 71 matched with the first limiting force applying part 641, so that the active back-off wheel 64 is forced by the wrench 7; and the top of the active back-off wheel 64 is provided with a safety cover plate 81. Specifically, the second limiting force applying part 71 is a limiting connecting port with internal threads, and the first limiting force applying part 641 is a force applying shaft sleeved in the limiting connecting port, and the force applying shaft is provided with external threads matched with the internal threads.

[0107] The manual back-off process is as follows: the safety cover plate 81 is opened, the force applying shaft on the top of the active back-off wheel 64 is exposed, the limiting connecting port of the wrench 7 is aligned and inserted into the force applying shaft and is screwed, until the wrench 7 is pressed and pre-tightened on the active back-off wheel 64, and in the pressing process, the pressing part 72 of the wrench 7 is pressed against the pressure receiving part 632 on the top of the driven back-off wheel 63, so as to press down the driven back-off wheel 63 and the firing wheel 62 by a certain stroke, until the firing wheel 62 is separated from the firing rack 5, and the elastic member 66 is pressed to generate a reset elastic force, after the firing wheel 62 is separated from the firing rack 5, when the wrench 7 is continuously rotated, the driven back-off wheel 63 is rotated, so that the misaligned protrusion 631a is clamped into the misaligned groove 621a, at this time, the teeth between the firing wheel 62 and the driven back-off wheel 63 are misaligned (i.e., the gears of the two are misaligned), and since the driven back-off wheel 63 is still engaged with the firing rack 5, the teeth between the firing wheel 62 and the firing rack 5 are also misaligned, and under the action of the elastic member 66, the firing wheel 62 is clamped and stuck at the bottom of the firing rack 5. At this time, due to the structural design of the first one-way guide slope 631a2 and the second one-way guide slope 621a2, if the wrench 7 is rotated counterclockwise to rotate the driven back-off wheel 63 counterclockwise, the driven back-off wheel 63 can still continue to rotate counterclockwise, so that the firing rack 5 drives the firing rod to continue to back off, thereby ensuring the function of manual back-off.

[0108] On the other hand, the misaligned protrusion 631a is clamped into the misaligned slot 621a, if the wrench 7 is rotated clockwise to make the driven back-off wheel 63 rotate clockwise, because of the structure design that the first one-way limiting surface 631a1 is in contact with the second one-way limiting surface 621a1, the driven back-off wheel 63 and the firing wheel 62 will move synchronously, however, the firing wheel 62 is always in mesh with the output wheel 61 on the output shaft of the firing motor 6, and at this time the firing motor 6 does not work, therefore, the driven back-off wheel 63 cannot rotate clockwise under the influence of the brake of the firing motor 6. Further, it ensures that the teeth between the driven back-off wheel 63 and the firing wheel 62 are always misaligned, and further ensures that the teeth between the firing rack 5 and the firing wheel 62 are always misaligned, thereby avoiding the possibility that the teeth of the firing wheel 62 and the teeth of the firing rack 5 are re-aligned, causing the firing wheel 62 to re-slide under the contact of the elastic member 66 and engage the firing rack 5, that is, the downward pressure of the wrench 7 is withdrawn, and the firing wheel 62 and the firing rack 5 cannot be re-engaged. Preventing the teeth between the firing wheel 62 and the firing rack 5 from being re-engaged, avoiding the possibility that the malfunctioning stapler is re-used, so that after the manual back-off of the firing rack 5, the malfunctioning stapler can also achieve the functions and effects of preventing reuse, effectively avoiding the safety hazards caused by reusing the malfunctioning stapler.

[0109] Because the firing wheel 62 cannot be re-engaged with the firing rack 5, even if the firing motor 6 drives the firing wheel 62 to rotate, it cannot smoothly drive the firing rack 5 to advance and retreat. Further, the possibility that the jammed stapler is re-used after manual back-off is avoided.

[0110] As shown in Figure 21 , the first misaligned engaging part 631 is a right-angled trapezoidal protrusion structure, and the second misaligned engaging part 621 is a trapezoidal protrusion slot structure matched with the right-angled trapezoidal protrusion and clamped by the right-angled trapezoidal protrusion.

[0111] In detail, as shown in Figure 21 , the second misaligned engaging part 621 is a trapezoidal protrusion, and the first misaligned engaging part 631 is a trapezoidal protrusion slot matched with the trapezoidal protrusion and clamped by the trapezoidal protrusion.

[0112] Anastomosis / clamping process: engaging the anastomosis handle 83 to close the nail cartridge assembly 82 to clamp the tissue to be cut and stapled.

[0113] Firing process: pinch the firing handle 84, one end of the firing handle 84 abuts against one end of the third switching trigger 32, the third switching trigger 32 rotates until the third switching trigger 32 contacts the third switching switch SW3, the third switching switch SW3 switches from the common terminal and the normally closed terminal to the common terminal and the normally open terminal, thereby triggering the firing motor 6 to rotate forward to drive the firing wheel 62 to rotate clockwise, the firing wheel 62 drives the firing rack 5 to move forward, the firing rack 5 drives the firing rod to move forward, the firing rod drives the closed staple cartridge assembly 82 to perform the staple cutting and stapling action, thereby completing the cutting and stapling of the tissue.

[0114] Automatic back-off process: release the firing handle 84, the third switching trigger 32 resets and breaks the contact with the third switching switch SW3, the third switching switch SW3 switches back to the common terminal and the normally closed terminal, thereby triggering the firing motor 6 to reverse rotation to drive the firing wheel 62 to rotate counterclockwise, thereby driving the firing rack 5 and the firing rod to back off.

[0115] In yet another embodiment, as shown in Figure 19 and Figure 22 , the firing motor 6 is provided with a transmission output wheel 61 mounted on the output shaft of the firing motor 6, and the firing wheel 62 is engaged with the transmission output wheel 61.

[0116] An anastomat firing control method, comprising the following steps: initialization step, anastomosis step, firing current limiting step, full force firing step, current limiting switch cut-off step, firing to the end step, back-off initial step, back-off later step, back-off to the end step. Among them:

[0117] Initialization step: see Figure 1 , the first switching switch SW1, the second switching switch SW2 and the third switching switch SW3 are all configured as the common terminal and the normally closed terminal (i.e. SW1-SW3 are 1-3 conductive), and the fourth switching switch SW0 is also configured as the common terminal and the normally closed terminal (i.e. SW0 is 1-2 conductive); the current limiting on-off switch 4 is configured to be conductive between the first end S4-1 and the second end S4-2. Corresponding structure part: see Figure 11 and Figure 12 A, the second switching trigger 22 is placed in the first avoiding position 52 of the firing rack 5, and the second trigger part 221 is separated from the second switching contact 21, corresponding to the common terminal and the normally closed terminal of the second switching switch SW2. See Figure 13 B, the first trigger part 121 of the first switching trigger 12 is separated from the first switching contact 11, corresponding to the common terminal and the normally closed terminal of the first switching switch SW1. See Figure 15 A, the firing handle 84 is away from the third switching trigger 32, and the third trigger part 321 is separated from the third switching contact 31, corresponding to the common terminal and the normally closed terminal of the third switching switch SW3. SeeFigure 23 The safety cover 81 is arranged on the main body of the anastomat, and the common terminal and the normally closed terminal of the fourth switch SW0 are in conduction. See Figure 18 and Figure 19 The current-limiting trigger part 421 of the current-limiting on-off trigger 42 is in contact with the current-limiting on-off contact 41 of the current-limiting on-off switch 4, and the current-limiting on-off switch 4 is in conduction between the first terminal S4-1 and the second terminal S4-2.

[0118] Anastomosis step: pinch the anastomosis handle 83, see Figure 15 A to B of FIG., after pinching the anastomosis handle 83, the firing handle 84 will be in close proximity to the first switch trigger 12, and see Figure 23 Pinching the anastomosis handle 83 will drive the nail cartridge assembly 82 to perform anastomosis action (i.e. the nail cartridge assembly 82 will be closed).

[0119] Firing current-limiting step: pinch the firing handle 84, see Figure 15 B to C of FIG., the third switch trigger 32 will be pushed by the firing handle 84 to rotate, so that the third trigger part 321 is in contact with the third switch contact 31 to trigger Figure 2 The third switch SW3 is switched to conduction between the common terminal and the normally open terminal (i.e. 1-2 conduction), at this time the current-limiting protection unit is powered on, the firing motor 6 is rotated in the forward direction, and the firing rack 5 is driven to move forward;

[0120] Full-power firing step: see Figure 12 A to B of FIG., the firing rack 5 moves forward, the second switch trigger 22 will be out of the first avoiding position 52, until the bottom of the second switch trigger 22 is in contact with the guide surface 54, at this time the second switch trigger 22 is twisted by a certain elastic deformation, so that the second trigger part 221 is in contact with the second switch contact 21, realizing Figure 3 The second switch SW2 is triggered to switch to conduction between the common terminal and the normally open terminal (i.e. from 1-3 conduction to 1-2 conduction), the current-limiting protection unit is disconnected, the firing motor 6 continues to drive the firing rack 5 to move forward at full power, the firing rack 5 drives the firing rod to move forward, and the firing rod drives the nail cartridge assembly 82 to perform nail cutting action;

[0121] Current-limiting switch off step: after the full-power firing step, see Figure 18 and Figure 19 The firing rack 5 continues to move forward until the front inner wall 511 of the firing rack 5 pushes the current-limiting trigger part 422 of the current-limiting on-off trigger 42, so that the current-limiting on-off trigger 42 is deflected, at the same time, the current-limiting on-off trigger 42 and the current-limiting reset knob 43 are deflected synchronously, and the current-limiting trigger part 421 and the current-limiting on-off contact 41 are separated, thereby realizing Figure 5 The first terminal S4-1 and the second terminal S4-2 of the current-limiting on-off switch 4 are disconnected.

[0122] Firing to bottom step: After the full firing step or the current-limiting switch-off step, the firing rack 5 continues to push forward, see Figure 13 A figure, the front inner wall 511 of the first sliding groove 51 of the firing rack 5 will push the first push part 122 of the first switching trigger 12, so that the first switching trigger 12 is deflected until the first trigger part 121 is in contact with the first switching contact 11, and then, the first switching switch SW1 in Figure 4 is triggered to switch to the conduction between the common end and the normally open end (i.e. from 1-3 conduction to 1-2 conduction), and the potential voltage is formed across the firing generator 6 to block the current flow, and the firing generator 6 stops rotating.

[0123] Back to the initial step: release the firing handle 84, see Figure 15 from C figure to B figure, the third trigger part 321 is reset and separated from the third switching contact 31, so that the third switching switch SW3 in Figure 5 is triggered to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction to 1-3 conduction), and the firing generator 6 is reversed and drives the firing rack 5 to retreat.

[0124] Back to the second step: the firing rack 5 retreats, see Figure 12 from B figure to A figure, the second switching trigger 22 is gradually reset and falls back to the first avoiding position 52 until the second trigger part 221 is separated from the second switching contact 21, so that the second switching switch SW2 in Figure 6 is triggered to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction to 1-3 conduction). At this time, the second switching trigger 22 is not completely reset to the first avoiding position 52, and the firing rack 5 still has a certain retreat stroke space.

[0125] Back to the bottom step: the firing rack 5 continues to retreat until Figure 13 from A figure to B figure, and Figure 14 i.e. when the firing rack 5 retreats to the bottom, the rear inner wall 512 of the first sliding groove 51 will push the first push part 122, so that the first switching trigger 12 is deflected until the first trigger part 121 is separated from the first switching contact 11 and the contact is disconnected, so that the first switching switch SW1 in Figure 7 is triggered to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction to 1-3 conduction).

[0126] Warning step: the anastomosis step and / or the firing current-limiting step are executed again, if the firing generator 6 cannot be started and cannot drive the rack to advance and retreat, it indicates that Figure 23The staple cartridge assembly 82 may have been used before, or the instrument may be stalled during the current limiting period without the staple cartridge assembly 82 installed, so it is necessary to realize whether to replace a new staple cartridge assembly 82 to avoid the safety hazard caused by the empty staple cartridge firing. After the anastomosis step is completed, the firing motor 6 cannot be directly started, and a reset step needs to be performed.

[0127] Reset step: manually dial the current limiting reset dial 43, see Figure 22 、 Figure 23 , and Figure 18 Fig. A and B, make the current limiting on-off trigger 42 deflect in the reset direction until the current limiting trigger part 421 re-touches the current limiting on-off contact 41, at this time, the first end S4-1 and the second end S4-2 of the current limiting on-off switch 4 in Figure 8 Re-conduct between. After the reset step, the anastomosis step and / or the firing current limiting step are performed again at this time, the firing motor 6 can be started to rotate to drive the firing rack 5 to advance and retreat.

[0128] Further, the full-power firing step further includes:

[0129] Active back-off step in the firing process: push the active stop dial 67, push the second dial part 125 of the first switch trigger 12, make the first switch trigger 12 rotate, until the first trigger part 121 touches the first switch contact 11, trigger the first switch SW1 to switch to the conduction of the common end and the normally open end, the firing motor 6 forms an equal potential voltage across the two ends to block the current flow, and the firing motor 6 stops rotating;

[0130] Step to the end of the firing: after the current limiting switch is turned off, if the active back-off step in the firing process is not performed, the firing rack 5 continues to advance until the first switch SW1 is triggered to switch to the conduction of the common end and the normally open end, the firing motor 6 forms an equal potential voltage across the two ends to block the current flow, and the firing motor 6 stops rotating.

[0131] Further, the full-power firing step further includes: manual back-off step: open the safety cover plate 81, the fourth switch SW0 switches to the conduction of the common end and the normally open end, the firing motor 6 stops, the first limiting force part 641 of the active back-off wheel 64 is exposed, the second limiting force part 71 of the wrench 7 is connected to the first limiting force part 641, and the wrench 7 is manually rotated to drive the active back-off wheel 64 to rotate, the driven back-off wheel 63 is synchronously rotated and drives the firing rack 5 to retreat.

Claims

1. A toggle switch structure for a stapler, characterized in that, include: The firing rack (5) is provided with a first groove (51) having a front inner wall (511) and a rear inner wall (512); The first changeover switch (SW1) is provided with a first changeover contact (11); and The first switching trigger (12) is provided with a first trigger part (121) adjacent to the first switching contact (11) and a first toggle part (122) inserted into the first slide (51). The first actuating part (122) is abutted by the front inner wall (511), causing the first switching trigger (12) to deflect toward the first trigger part (121) and closer to the first switching contact (11); the first actuating part (122) is also abutted by the rear inner wall (512), causing the first switching trigger (12) to deflect toward the first trigger part (121) and away from the first switching contact (11).

2. The anastomosis device toggle switch switching structure according to claim 1, characterized in that, The first switching trigger (12) is further provided with a hinge (123) for movably mounting the first switching trigger (12) on the stapler.

3. The anastomosis device toggle switch switching structure according to claim 2, characterized in that, The hinge portion (123) is located on the side of the first switching trigger (12) close to the first toggle portion (122), and the first trigger portion (121) is located on the side of the first switching trigger (12) away from the first toggle portion (122).

4. The anastomosis device toggle switch switching structure according to claim 1, characterized in that, The anastomosis device's toggle switch switching structure also includes: A flow-limiting disconnect switch (4) is provided with a flow-limiting disconnect contact (41). The current limiting trigger (42) is provided with a current limiting trigger part (421) adjacent to the current limiting contact (41), and extends into the first slide groove (51) and rotates against the front inner wall (511), so that the current limiting trigger part (421) contacts the current limiting receiving part (422) of the current limiting contact (41); and The current limiting reset switch (43) is connected at one end to the current limiting cut-off trigger (42) and is used to receive manual force to rotate the current limiting cut-off trigger (42) to reset, so that the current limiting trigger part (421) is separated from the current limiting cut-off contact (41).

5. The anastomosis device toggle switch switching structure according to claim 1, characterized in that, One end of the firing rack (5) is provided with a first stop (52), and the anastomosis device toggle switch switching structure also includes: The second switching trigger (22) is tilted and placed at the first recess (52), with a second trigger part (221) on one side; and The second switching switch (SW2) is disposed adjacent to the second trigger part (221) and has a second first switching contact (11) that is adjacent to and contacted by the second trigger part (221).

6. An active stop structure for a stapler, characterized in that, The anastomosis device toggle switch switching structure according to any one of claims 1-5 further includes an active stop button (67) with a second slide groove (671) for manually pushing the first switching trigger (12) to deflect; The first switching trigger (12) is also provided with a second toggle part (125) that is inserted into the second slide (671).

7. The active stop structure for the stapler according to claim 6, characterized in that, The second actuating part (125) has a clearance notch (125a) on the side near the active stop button (67).

8. A stapler, characterized in that, The stapler includes the stapler toggle switch switching structure as described in any one of claims 1-5, and further includes: A generator (6) is used to drive the firing rack (5) forward and backward; The firing lever, one end of which is connected to one end of the firing rack (5), is driven forward and backward by the firing rack (5); and The main body, the generator (6), the firing rod and the firing rack (5) are all installed inside the main body, and the main body is provided with a mounting bracket (8), and the first switching trigger (12) is hinged to the mounting bracket (8); The first switching trigger (12) is provided with a limiting protrusion (124), and the mounting bracket (8) is provided with a limiting protrusion (85) into which the limiting protrusion (124) is inserted; the mounting bracket (8) is also provided with a mounting shaft (86) hinged to the hinge part (123) of the first switching trigger (12).

9. An active stop-type stapler, characterized in that, Including the active stop structure of the stapler as described in any one of claims 6 or 7, it further includes: A generator (6) is used to drive the firing rack (5) forward and backward; The firing lever is connected at one end to one end of the firing rack (5) and is driven forward and backward by the firing rack (5); The main body, the generator (6), the firing rod and the firing rack (5) are all mounted on the main body; the first switching trigger (12) is hinged to the main body; the active stop button (67) is movably mounted on the main body and can be translated along the length direction of the first slide groove (51) and / or the second slide groove (671).

10. The active stop anastomosis device according to claim 9, characterized in that, The main body is provided with a guide rail, and the active stop button (67) is provided with a third slide groove into which the guide rail is inserted.

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