Anastomat change-over switch structure and anastomat

Abstract

The utility model relates to the technical field of anastomats, in particular to an anastomat change-over switch structure and an anastomat. An anastomat change-over switch structure comprises a percussion rack, a second avoiding position, a first connecting rod and a second connecting rod, the second switching triggering piece is obliquely placed in the first avoiding position, and a second triggering part is arranged on one side of the second switching triggering piece; and the second change-over switch is arranged adjacent to the second trigger part and is provided with a second change-over contact which is adjacent to the second trigger part and is contacted by the second trigger part. According to the scheme, stable triggering and automatic resetting of the switch are achieved when the percussion rack moves forwards or backwards through ingenious cooperation of the percussion rack and the first avoiding position and the combination mode of the elastic triggering piece and the switch, and therefore the operation efficiency and safety of the anastomat are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to anastomat technical field especially, it relates to anastomat switching switch structure and anastomat. BACKGROUND

[0002] Electric anastomat is widely used in surgical operation, and the firing process is usually realized by reciprocating movement of rack driven by motor to anastomose, staple or cut the tissue. In order to detect or switch operating state when rack moves to a specific position, the prior art usually sets trigger on rack, and realizes signal output or action linkage by cooperating switch.

[0003] For example, Chinese invention patent CN111202553B discloses a kind of for electric anastomat manual back-off device and its electric anastomat, mention in the firing rack movement process by specific structure to trigger or release switch, to assist complete corresponding function. But in actual application, how to set trigger on rack, so that trigger and switch contact can be arranged in close proximity, and keep stable triggering or release when rack moves to different positions, there is still room for further improvement. Especially in the narrow anastomat, more reliable and durable trigger mechanism is needed to adapt to frequent start-stop or long time use. SUMMARY

[0004] The utility model aims at the deficiency of prior art to provide anastomat switching switch structure and anastomat, to realize more reliable switch switching and high-frequency use durability without increasing the complexity of anastomat, to improve electric anastomat operating precision and safety.

[0005] The utility model realizes above-mentioned purpose by following technical scheme: anastomat switching switch structure includes: firing rack, first avoidance is set to one end;Second switching trigger, is placed in first avoidance obliquely, and second trigger part is equipped on one side;And second switching switch, is equipped in second trigger part, and second switching contact is set to be in close proximity to second trigger part and be contacted by second trigger part.

[0006] Further, one side of the second switching switch is provided with a plug-in interface, the second switching trigger is provided with a bolt that is tightly fitted / loosely fitted and inserted into the plug-in interface, the second switching trigger is an elastic component and has a certain elastic deformation performance, so that the second switching trigger generates elastic deformation when it is separated from the first avoidance, the bottom of the second switching trigger is reset and placed obliquely in the first avoidance when it is adjacent to the first avoidance, and then the second trigger part and the second switching contact of the second switching switch are separated.

[0007] Further, the bottom of the second switching trigger is placed obliquely in the first avoidance, and the second trigger part is arranged on the bottom of the second switching trigger.

[0008] The second switching switch is located at the top of the second trigger part, and a second switching contact of the second switching switch is located at the bottom of the second switching switch;

[0009] The second trigger part of the second switching trigger contacts the second switching contact of the second switching switch by elastic deformation of the bottom of the second switching trigger;

[0010] One side of the firing rack is provided with a guide surface which is contacted by the bottom of the second switching trigger and extends to the first avoiding position.

[0011] Further, when the second switching trigger is placed in the first avoiding position, the second trigger part is separated from the second switching contact of the second switching switch;

[0012] When the bottom of the second switching trigger is separated from the first avoiding position and contacts the guide surface, the second trigger part contacts the second switching contact of the second switching switch. Specifically, the sharp part of the included angle formed between the guide surface and the guide inclined surface of the first avoiding position abuts against the bottom of the second switching trigger. Since one side of the mounting wall of the second switching trigger is tightly fitted / loosely fitted and fixed to the second switching switch by the latch, the bottom of the second switching trigger is elastically twisted by the abutment of the sharp part of the included angle, so that the second trigger part of the second switching trigger abuts against the second switching contact of the second switching switch, the switching of the second switching switch is realized, that is, the conduction of the second switching switch is switched from the common terminal and the normally closed terminal to the common terminal and the normally open terminal.

[0013] Further, the side surface of the second switching trigger is provided with a mounting wall, and the latch is arranged on the mounting wall. The second trigger part protrudes from the bottom of the second switching trigger; further comprising a current-limiting on-off switch and a current-limiting on-off trigger. One end of the second switching trigger away from the second trigger part is fixed to the second switching switch; the firing rack moves forward, the second switching trigger is separated from the first avoiding position, and the second switching trigger generates an elastic deformation force to make the second trigger part contact the second switching contact of the second switching switch. The second switching switch has a common terminal, a normally closed terminal and a normally open terminal. When the second trigger part contacts the second switching contact, the second switching switch is switched from the conduction of the common terminal and the normally closed terminal to the conduction of the common terminal and the normally open terminal.

[0014] Further, an elastic member is further arranged for generating an elastic force when the second switching trigger is separated from the first avoiding position, releasing the elastic force and resetting the second switching trigger to be inclined and placed in the first avoiding position when the bottom of the second switching trigger is adjacent to the first avoiding position, so as to separate the second trigger part from the second switching contact of the second switching switch.

[0015] An anastomat comprising the anastomat switch structure of any one of the preceding claims, further comprising:

[0016] a firing motor for driving the firing rack to and fro, a firing rod connected at one end to the firing rack near the first avoidance position and driven by the firing rack to and fro, and a main body in which the firing motor, the firing rod and the second switch are installed.

[0017] The anastomat has the following advantages: the first avoidance position is arranged at one end of the firing rack, and the second switch trigger is arranged obliquely next to the second switch, so that stable and accurate switch switching is realized in the stroke of the firing rack, and the anastomat has the following main advantages:

[0018] 1. Precise detection of rack position. With the cooperation of the first avoidance position and the obliquely arranged second switch trigger, when the firing rack moves to the predetermined position, the second trigger part can accurately contact or separate from the switch contact (i.e. the second switch contact), thereby improving the accuracy of the operation process.

[0019] 2. Compact structure and easy installation. The second switch trigger is obliquely arranged in the first avoidance position, and the second switch contact is arranged next to the second trigger part, so that function integration can be realized in a limited space, the number of stacked parts is reduced, and the internal assembly of the anastomat is facilitated.

[0020] 3. Elastic adaptation to high-frequency use. The obliquely arranged second switch trigger can be slightly deformed or twisted during the reciprocating motion of the firing rack, which can adapt to multiple start-stop or long-time work, reduce wear and prolong the service life of the anastomat.

[0021] 4. Easy to cooperate with other functional units. When current limiting protection, manual back-off and other mechanisms are needed, the structure of the first avoidance position + second switch trigger can be combined with them, which provides a good interface for subsequent expansion of functions, and further improves the safety and multifunctionality of the anastomat.

[0022] In summary, the first avoidance position and the second switch trigger at the end of the firing rack are improved, and more reliable switch switching and high-frequency use durability are realized without increasing the complexity of the anastomat, which has a positive significance for improving the operation accuracy and safety of the electric anastomat. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The circuit diagram is for the initial state of the motor control circuit.

[0024] Figure 2 The circuit diagram is for the firing current limiting state of the motor control circuit.

[0025] Figure 3 Circuit diagram for full fire state of motor control circuit.

[0026] Figure 4 Circuit diagram for fire to bottom state of motor control circuit.

[0027] Figure 5 Circuit diagram for back up initial state of motor control circuit.

[0028] Figure 6 Circuit diagram for back up late state of motor control circuit.

[0029] Figure 7 Circuit diagram for back up to bottom state of motor control circuit.

[0030] Figure 8 Circuit diagram for reset state of motor control circuit.

[0031] Figure 9 Circuit diagram for active back up during fire state of motor control circuit.

[0032] Figure 10 Circuit diagram for manual back up with safety cover open of motor control circuit.

[0033] Figure 11 Structure exploded view and local structure enlarged view of switching structure of anastomat.

[0034] Figure 12 Structure view of switching structure of anastomat in two switching states.

[0035] Figure 13 Structure view of switching structure of anastomat in two switching states.

[0036] Figure 14 Structure exploded view and local structure enlarged view of switching structure of anastomat.

[0037] Figure 15 Structure view of anastomat in anastomosis and fire state between anastomosis handle, fire handle and third switching switch.

[0038] Figure 16 Structure exploded view and local structure enlarged view of first switching trigger and mounting frame.

[0039] Figure 17 Local structure view of first switching trigger in two states.

[0040] Figure 18 Structure exploded view and structure view of current limiting on-off switch in non-exploded state.

[0041] Figure 19 This is a structural diagram showing a partial structural breakdown of the present invention.

[0042] Figure 20 This is a schematic diagram of the active retraction structure of the anastomosis device in two states.

[0043] Figure 21 These are schematic diagrams and enlarged partial structural diagrams of the firing wheel and driven return wheel of the present invention from two different perspectives.

[0044] Figure 22 This is a structural schematic diagram of another part of the present invention.

[0045] Figure 23 This is an enlarged schematic diagram of the overall structure and some parts of the present invention.

[0046] Figure 24 This is a schematic diagram of the connection structure between the active retraction wheel and the circuit board of the present invention.

[0047] Figure 25 This is a schematic diagram of the manual retraction process of the stapler of the present invention.

[0048] Figure 26 This is a schematic diagram of the toggle switch switching structure of the anastomosis device of the present invention.

[0049] Figure 27 for Figure 26 A structural diagram of Figure A from another perspective.

[0050] 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

[0051] 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.

[0052] 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.

[0053] a third switch SW3, a common terminal of which is connected to a negative pole of the firing motor 6, an always-on terminal of which is connected to the other end of the PTC, and an always-off terminal of which is connected to a negative pole terminal of the power supply;

[0054] a second switch SW2, a common terminal of which is connected to an always-off terminal of the fourth switch SW0, an always-on terminal of which is connected to an always-on terminal of the third switch SW3, and an always-off terminal of which is connected to the first terminal S4-1;

[0055] a first switch SW1, a common terminal of which is connected to a positive pole of the firing motor 6, an always-on terminal of which is connected to an always-off terminal of the fourth switch SW0, and an always-off terminal of which is connected to a negative pole terminal of the power supply;

[0056] a fourth switch SW0, a common terminal of which is connected to a positive pole terminal of the power supply, and an always-on terminal of which is vacant.

[0057] Further, the motor control circuit is also connected in parallel with an indicator light module. Specifically, one end of the indicator light module is electrically connected to an always-off terminal of the fourth switch SW0, and the other end of the indicator light module is connected to an always-off terminal of the first switch SW1 and / or a negative pole of the power supply.

[0058] It should be noted that the motor control circuit can be used in the field of anastomat and other fields with motors.

[0059] 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:

[0060] The firing rack 5 is provided with a first avoiding position 52 at one end;

[0061] The second switch trigger 22 is obliquely placed in the first avoiding position 52, and is provided with a second trigger part 221 at one side;

[0062] The second switch SW2 is provided adjacent to the second trigger part 221, and is provided with a second switch contact 21 which is in close proximity to the second trigger part 221 and is contacted by the second trigger part 221.

[0063] Further, one side of the second switch SW2 is provided with a plug-in interface 201, the second switch trigger 22 is provided with a plug 222 which is tightly fitted / loosely fitted into the plug-in interface 201, and the second switch trigger 22 is a resilient component and has 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 bottom of the second switch trigger 22 is reset to be obliquely placed in the first avoiding position 52 when it 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.

[0064] 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.

[0065] 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.

[0066] A switch switching structure of an anastomat, comprising:Figure 13 、 Figure 14 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.

[0067] The firing rack 5 is provided with a first sliding slot 51 having a front inner wall 511 and a rear inner wall 512.

[0068] The first switching switch SW1 is provided with the first switching contact 11.

[0069] 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.

[0070] 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 close to the first switching contact 11, and 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 away from the first switching contact 11. 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 between the common terminal and the normally closed terminal to the conduction between 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.

[0071] Further, the first switching trigger 12 is also provided with a hinge portion 123 for movably mounting the first switching trigger 12 on the anastomat. Specifically, the first switching trigger 12 deflects based on the hinge portion 123 as the pivot. The hinge portion 123 is a hinge hole, and the mounting shaft 86 of the mounting frame 8 is inserted into the hinge hole.

[0072] Further, as shown in Figure 18 、 Figure 19 、 Figure 22 The current-limiting on-off switch 4, the current-limiting on-off trigger 42 and the current-limiting reset knob 43 are further included. Wherein:

[0073] The current-limiting on-off switch 4 is provided with a current-limiting on-off contact 41;

[0074] The current-limiting on-off trigger 42 is provided with a current-limiting trigger part 421 adjacent to the current-limiting on-off contact 41, and a first sliding groove 51 extending into the firing rack 5 and being 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.

[0075] 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 ready-to-fire state; 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.

[0076] 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 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 which timeFigure 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.

[0077] 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.

[0078] 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.

[0079] 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 a resilient member 66 sleeved on the guide shaft 65, the resilient member 66 exerts a 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 wrench 7 can apply force to the active return wheel 64. 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 used for pressing the driven return wheel 63 and the firing wheel 62 by abutting the pressure receiving part 632 below. 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 to the active return wheel 64 and manually apply force and rotate the active return wheel 64.

[0080] 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 can be opened by pressing the reset button in C.

[0081] 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 a resilient member 66. Wherein:

[0082] The firing wheel 62 is movably connected with the firing motor 6 and the firing rack 5;

[0083] 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.

[0084] The active return wheel 64 is meshed with the driven return wheel 63;

[0085] Wrench 7 is used to rotate the active return wheel 64 and press down the driven return wheel 63;

[0086] 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;

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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, which is provided with external threads matched with the internal threads.

[0091] 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 screwed, until the wrench 7 is pressed and pre-tightened on the active back-off wheel 64. During 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 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.

[0092] 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, so 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Anastomosis / clamping process: engaging the anastomosis handle 83 to close the staple cartridge assembly 82 to clamp the tissue to be cut and stapled.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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:

[0101] 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 figure, the second switching trigger 22 is placed in the first avoidance 52 of the firing rack 5, 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 figure, 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 figure, the firing handle 84 is away from the third switching trigger 32, 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.

[0102] Anastomosis step: pinch the anastomosis handle 83, see Figure 15 A to B of the figure, 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).

[0103] Firing current-limiting step: pinch the firing handle 84, see Figure 15 B to C of the figure, 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;

[0104] Full-power firing step: see Figure 12 From A to B of the figure, 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;

[0105] 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.

[0106] 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.

[0107] 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 bounced back to reset and separated from the third switching contact 31, so as to trigger the third switching switch SW3 in Figure 5 to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction back to 1-3 conduction), and the firing generator 6 reverses and drives the firing rack 5 to back up.

[0108] Back to the late step: the firing rack 5 backs up, see Figure 12 from B figure to A figure, the second switching trigger 22 is gradually bounced back to 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 as to trigger the second switching switch SW2 in Figure 6 to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction back to 1-3 conduction). At this time, the second switching trigger 22 has not completely reset to the first avoiding position 52, and the firing rack 5 still has a certain back-up stroke space.

[0109] Back to the bottom step: the firing rack 5 continues to back up until Figure 13 from A figure to B figure, and Figure 14 i.e. when the firing rack 5 backs up 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 broken, so as to trigger the first switching switch SW1 in Figure 7 to switch to the conduction between the common end and the normally closed end (i.e. from 1-2 conduction back to 1-3 conduction).

[0110] 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.

[0111] Reset step: manually dial the current limiting reset dial 43, see Figure 22 、 Figure 23 , and Figure 18 A and B figures, 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 are re-conducted. After the reset step, the anastomosis step and / or the firing current limiting step are performed again, and the firing motor 6 can be started to rotate to drive the firing rack 5 to advance and retreat.

[0112] Further, the full-power firing step further includes:

[0113] Active back-off step in the firing process: push the active stop dial 67 to push the second dial part 125 of the first switch trigger 12, so that the first switch trigger 12 rotates until the first trigger part 121 touches the first switch contact 11, triggering the first switch SW1 to switch to the conduction of the common end and the normally open end, forming an equal potential voltage across the firing motor 6 to block the current flow, and the firing motor 6 stops rotating;

[0114] Step to the end of 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 switches to the conduction of the common end and the normally open end, forming an equal potential voltage across the firing motor 6 to block the current flow, and the firing motor 6 stops rotating.

[0115] 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. An anastomosis device switching switch configuration, characterized by, The utility model relates to a second switch trigger (22) and a second switch (SW2) of a second switch (SW2) of a second switch trigger (22) of a firing rack (5) of a firing mechanism. The second switch trigger (22) is placed in the first avoiding position (52), and one side of the second switch trigger (22) is provided with a second trigger part (221). The second switch (SW2) is arranged adjacent to the second trigger part (221), and is provided with a second switch contact (21) which is close to the second trigger part (221) and is contacted by the second trigger part (221). One side of the second switch (SW2) is provided with a plug-in interface (201), the second switch trigger (22) is provided with a plug pin (222) which is inserted into the plug-in interface (201), and the second switch trigger (22) is an elastic component.

2. The anastomosis switcher switch configuration of claim 1, wherein, The bottom of the second switch trigger (22) is placed obliquely in the first avoiding position (52), and the second trigger part (221) is arranged at the bottom of the second switch trigger (22).

3. The anastomosis switcher switch configuration of claim 1, wherein, The second switch (SW2) is located at the top of the second trigger part (221), and the second switch contact (21) of the second switch (SW2) is located at the bottom of the second switch (SW2). The contact between the second trigger part (221) of the second switch trigger (22) and the second switch contact (21) of the second switch (SW2) is realized by the elastic deformation of the bottom of the second switch trigger (22). One side of the firing rack (5) is provided with a guide surface (54) which is contacted by 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).

4. The anastomosis switcher switch configuration of claim 3, wherein, When the bottom of the second switch trigger (22) is separated from the first avoiding position (52) and contacts the guide surface (54), the second trigger part (221) contacts the second switch contact (21) of the second switch (SW2). The side surface of the second switch trigger (22) is provided with a mounting wall, and the plug pin (222) is arranged on the mounting wall.

5. The anastomosis switcher switch configuration of claim 2, wherein, The second trigger part (221) protrudes from the bottom of the second switch trigger (22).

6. The stapler toggle switch configuration of claim 1, wherein: The utility model also comprises a current-limiting on-off switch (4) and a current-limiting on-off trigger (42). One end of the second switch trigger (22) away from the second trigger part (221) is fixed to the second switch (SW2).

7. The anastomosis switcher switch configuration of claim 1 wherein, When the firing rack (5) moves forward, the second switch trigger (22) is separated from the first avoiding position (52), the second switch trigger (22) generates an elastic deformation force, and the second trigger part (221) and the second switch contact (21) of the second switch (SW2) are contacted. The second switch (SW2) has a common terminal, a normally closed terminal and a normally open terminal, and when the second trigger part (221) contacts the second switch contact (21), the second switch (SW2) is switched from the conduction of the common terminal and the normally closed terminal to the conduction of the common terminal and the normally open terminal.

8. The stapler toggle switch construction according to Claim 1 wherein, ​ 9. The anastomosis switcher switch configuration of claim 1 wherein, Further comprising an elastic member for generating elastic force when the second switching trigger (22) is disengaged from the first avoiding position (52), and releasing the elastic force and resetting the second switching trigger (22) to be inclined and repositioned in the first avoiding position (52) when the bottom of the second switching trigger (22) is adjacent to the first avoiding position (52).

10. An anastomat characterized by comprising: The anastomat switching switch structure of any one of claims 1-9 further comprises: a firing motor (6) for driving the firing rack (5) to advance and retreat; a firing rod, one end of which is connected to one end of the firing rack (5) close to the first avoiding position (52) and is driven by the firing rack (5) to advance and retreat; a main body, the firing motor (6), the firing rod and the second switching switch (SW2) are all installed in the main body.

Images