The structure of the manual retraction device and the electric stapler

Abstract

This application provides a manually retractable blade structure and an electric stapler. The manually retractable blade structure includes a power unit, a jaw drive assembly, a cutting blade drive assembly, a first gear, a third gear, a fourth gear, a fifth gear, and a connecting member. The third gear and the fourth gear are connected by the connecting member. The power unit drives the fifth gear to rotate, and the third gear drives the first gear to rotate. When the first gear rotates, it moves the jaw drive assembly and / or the cutting blade drive assembly. The manually retractable blade structure can switch between electric and manual modes. In electric mode, the fifth gear meshes with the fourth gear; in manual mode, the fourth gear disengages from the fifth gear. When the connecting member is pressed down, the manually retractable blade structure switches to manual mode. The structure is simple and easy to operate; fewer parts also improve reliability.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a manually retractable blade structure and an electric stapler. Background Technology

[0002] With the continuous development of medical device technology, electric staplers are gradually replacing traditional manual sutures or conventional staplers. Electric staplers utilize electric drive systems and automated control technology, enabling rapid and accurate connection and closure of tissues during surgery. This significantly reduces surgical time and trauma, minimizes the risk of tissue damage, bleeding, and infection, and promotes patient recovery and healing. Secondly, electric staplers can provide consistent anastomosis force and pressure, unaffected by variations in manual operation, thus lowering the operator's skill requirements. However, during the use of electric staplers, situations may arise where the jaws cannot open or the cutting blade cannot retract, affecting the safety of their use. Summary of the Invention

[0003] This application provides a manual retraction structure and an electric stapler, which can switch to manual mode when the electric motor fails to improve safety.

[0004] This application provides a manual blade retraction structure, comprising: a power unit, a jaw drive assembly, a cutting blade drive assembly, a first gear, a third gear, a fourth gear, a fifth gear, and a connecting member. The third gear and the fourth gear are connected via the connecting member. The power unit drives the fifth gear to rotate, and the third gear drives the first gear to rotate. When the first gear rotates, it moves the jaw drive assembly and / or the cutting blade drive assembly. The manual blade retraction structure can switch between an electric mode and a manual mode. In the electric mode, the fifth gear meshes with the fourth gear. In the manual mode, the fourth gear disengages from the fifth gear. When the connecting member is pressed downwards, the manual blade retraction structure switches to the manual mode.

[0005] Furthermore, the top of the connector can be used to assemble an external operating component to rotate the connector and the third gear.

[0006] Furthermore, the connector is provided with an operating hole for the insertion of the end of the external operating component.

[0007] Furthermore, the manual retraction structure includes an elastic element. When the connecting member moves downward, it squeezes the elastic element, and the pushing force of the elastic element pushes the connecting member upward, causing it to move upward.

[0008] Furthermore, the manual retraction structure also includes a second gear, which meshes with the first gear, and the second gear moves the cutting blade drive assembly.

[0009] Furthermore, the manual retraction structure includes a stop member, which, in the manual mode, is located above the connecting member to prevent it from moving upward.

[0010] Furthermore, the manual retraction structure includes a housing, and the connecting member and the blocking member are rotatably disposed in the housing. In the electric mode, the blocking member rotates to one side of the connecting member.

[0011] Furthermore, the manual retraction structure also includes a second elastic element, which abuts against the stopper to keep it above the connector.

[0012] Furthermore, one end of the second elastic member abuts against the blocking member, and the other end abuts against the housing.

[0013] Furthermore, the manual retraction structure also includes a first limiting shaft, the abutment includes a base and a pair of ears extending from the base, the pair of ears are respectively provided with a first assembly hole, the housing is provided with a second assembly hole, the second elastic member is provided with a third assembly hole, the first limiting shaft passes through the first assembly hole and the third assembly hole and is assembled in the second assembly hole, the base is provided with a first groove, the housing is provided with a second groove, one end of the second elastic member is received in the first groove, and the other end is received in the second groove.

[0014] Furthermore, the manual retraction structure also includes a fixing member sleeved on the connecting member, the connecting member being rotatable relative to the fixing member, and in the electric mode, the blocking member abuts against the fixing member.

[0015] Furthermore, the fastener includes a protruding rib, the housing is provided with a receiving hole and a groove communicating with the receiving hole, the fastener is received in the receiving hole, and the protruding rib is received in the groove and can move along the groove.

[0016] This application also provides an electric stapler, including jaws, a cutting blade, and the aforementioned manual blade retraction structure, wherein the jaws are connected to the jaw drive assembly, and the cutting blade is connected to the cutting blade drive assembly.

[0017] Compared with the prior art, the third and fourth gears of the manual retraction structure of this application are connected by a connector. When the connector is pressed down, it can be switched to manual mode. This not only has a simple structure, but also makes operation simple and convenient. With fewer parts, it also improves reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stapler according to an embodiment of this application.

[0019] Figure 2 yes Figure 1 The diagram shows a manual tool retraction structure, where only a portion of the components of the manual tool retraction structure are shown.

[0020] Figure 3 yes Figure 2 A schematic diagram of another perspective of the manually retractable tool structure shown.

[0021] Figure 4 yes Figure 1 A schematic diagram of the casing is shown.

[0022] Figure 5 yes Figure 4 An enlarged view of the circled portion at point A of the outer casing shown.

[0023] Figure 6 yes Figure 3 A schematic diagram of the first pusher component of the manually retractable tool structure shown.

[0024] Figure 7 yes Figure 3 A schematic diagram of the second pusher component in the manually retractable tool structure shown.

[0025] Figure 8 yes Figure 1 The side view of the manually retracting tool structure shown indicates that the abutment disengages from the abutment of the first pusher.

[0026] Figure 9 yes Figure 8 The diagram shows a cross-sectional view of the manual retraction structure along line X1-X1.

[0027] Figure 10 yes Figure 1 The side view of the manually retracting tool structure shown indicates that the abutting member abuts against the first pushing member.

[0028] Figure 11 yes Figure 10 An enlarged view of the circled portion at point B of the manually retractable tool structure shown.

[0029] Figure 12 yes Figure 1 The side view of the manually retracting tool structure shown shows the first pusher abutting against the limiting member.

[0030] Figure 13 yes Figure 12 A cross-sectional view of the manually retractable tool structure along line X2-X2.

[0031] Figure 14 yes Figure 13 An enlarged view of the circled portion at point C in the cross-sectional schematic diagram shown.

[0032] Figure 15 yes Figure 3 The diagram shows the abutment detaching from the first pusher when it abuts against it.

[0033] Figure 16 yes Figure 1 The diagram shows a manual retraction mechanism, in which the stapler is in electric mode.

[0034] Figure 17 yes Figure 16 An enlarged view of the D prescription box portion of the manually retractable blade structure shown.

[0035] Figure 18 yes Figure 1 The diagram shows a manual retraction mechanism, where the anastomosis device is in manual mode.

[0036] Figure 19 yes Figure 18 An enlarged view of the E prescription box portion of the manually retractable blade structure shown.

[0037] Figure 20 yes Figure 16 The diagram shows the blocking component, elastic component, and first limiting shaft of the manual retraction structure.

[0038] Figure 21 yes Figure 4 A schematic diagram of the casing from another perspective.

[0039] Figure 22 yes Figure 21 A schematic diagram of the outer casing from another perspective.

[0040] Figure 23 yes Figure 19 A schematic diagram of the connector shown.

[0041] Figure 24 yes Figure 23 The diagram shows a cross-sectional view of the connector.

[0042] Reference numerals: Anastomosing device, 300; Manual retraction mechanism, 100; Jaws, 200; Power unit, 1; Transmission mechanism, 2; First gear, 21; First shaft, 210; First tooth, 211; Toothless part, 212; First hole, 213; Second gear, 22; Second shaft, 220; Second tooth, 221; Third gear, 23; Third shaft, 230; Third tooth, 231; Fourth gear, 24; Fourth tooth Part, 241; Recess, 242; Fifth gear, 25; Fifth tooth, 251; Connector, 26; Operating hole, 261; Shoulder, 262; First connector, 263; Second connector, 264; Jaw drive assembly, 3; Sleeve, 30; Limiting member, 31; Receiving space, 311; Slide groove, 312; First push member, 32; First helical tooth, 321; First columnar part, 322; Cavity, 3221; Rod-shaped part, 323 ; Second free end, 3231; Second pusher, 33; Slider, 331; Second helical tooth, 332; Receiving groove, 333; Second columnar part, 334; Top block, 34; Through hole, 341; Rotating shaft, 342; Cutting blade drive assembly, 4; Rack, 41; Sixth tooth, 411; Mandrel, 42; Housing, 5; Receiving cavity, 51; Second assembly hole, 52; Second groove, 53; Third groove, 54; Receiving hole, 55; Groove 56; elastic device; 6; abutting member; 7; second hole; 71; first free end; 73; abutting member; 81; base; 811; first groove; 8111; ear; 812; first assembly hole; 8121; second elastic member; 82; assembly part; 821; third assembly hole; 8211; first abutting part; 822; second abutting part; 823; first limiting shaft; 83; first elastic member; 84; fixing member; 9; protruding rib; 91. Detailed Implementation

[0043] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0044] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0045] See Figures 1 to 3 The anastomosis device 300 of this application includes a manually retractable blade structure 100 and jaws 200 and / or a cutting blade (not shown) connected to the manually retractable blade structure 100. The manually retractable blade structure 100 includes a power unit 1, a transmission mechanism 2, a jaw drive assembly 3, and a cutting blade drive assembly 4.

[0046] The power unit 1 provides a power source, which drives the jaw drive assembly 3 to switch the jaws 200 between a closed state and an open state via the transmission mechanism 2. In the closed state, the jaws 200 are closed to clamp tissue; in the open state, the jaws 200 are open to release tissue.

[0047] The power unit 1 provides a power source, which drives the cutting blade drive assembly 4 to fire and retract the cutting blade via the transmission mechanism 2. When the cutting blade is fired, it advances to cut and suture tissue.

[0048] In some embodiments, the transmission mechanism 2 includes a first gear 21, a second gear 22, a third gear 23, a fourth gear 24, and a fifth gear 25.

[0049] In some embodiments, the first gear 21 rotates to move the jaw drive assembly 3, which in turn moves the jaws 200 between a closed and an open state; the first gear 21 rotates the second gear 22; the second gear 22 moves the cutting blade drive assembly 4, which in turn moves the cutting blade to fire and retract; the third gear 23 rotates the first gear 21; the fifth gear 25 rotates the third gear 23 and the fourth gear 24; the fifth gear 25 is connected to the shaft (not shown) of the power unit 1; and the shaft rotates the fifth gear 25.

[0050] In some embodiments, the cutting blade drive assembly 4 includes a rack 41, and the second gear 22 carries the rack 41 forward and backward.

[0051] In this manual, "forward" refers to the movement of the manual retraction structure 100 forward; "backward" refers to the movement of the manual retraction structure 100 backward.

[0052] In some embodiments, the first tooth 211 of the first gear 21 meshes with the second tooth 221 of the second gear 22, the third tooth 231 of the third gear 23 meshes with the first tooth 211 of the first gear 21, the fourth tooth 241 of the fourth gear 24 meshes with the fifth tooth 251 of the fifth gear 25, the fourth gear 24 and the third gear 23 are connected by the connector 26, and the third gear 23 is located above the fourth gear 24 along the height direction of the manual retraction structure 100; the second tooth 221 of the second gear 22 meshes with the sixth tooth 411 of the rack 41.

[0053] In some embodiments, the fourth tooth 241 can be connected vertically to the third tooth 231 as a single unit, that is, the third gear 23 and the fourth gear 24 are combined into one.

[0054] In some embodiments, the fourth gear 24 and the fifth gear 25 may be omitted, and the third gear 23 may be fixed on the shaft of the power unit 1.

[0055] In some embodiments, the third gear 23, the fourth gear 24 and the fifth gear 25 may be omitted, and the first gear 21 is fixed on the shaft of the power unit 1.

[0056] In some embodiments, along the height direction of the manually retractable tool structure 100, the top end of the second tooth 221 engages with the first tooth 211, and the bottom end of the second tooth 221 engages with the sixth tooth 411. In some embodiments, the top and bottom ends of the second tooth 221 can be directly connected, or they can be connected through a toothless connecting portion.

[0057] In some embodiments, the first gear 21 is provided with a toothless portion 212. Along the circumferential direction of the first gear 21, the toothless portion 212 is located between two first teeth 211. During the rotation of the first gear 21, when the first teeth 211 mesh with the second teeth 221, the first gear 21 drives the second gear 22 to rotate. When the toothless portion 212 engages with the second teeth 221, the first gear 21 cannot drive the second gear 22 to rotate, and the second gear 22 does not rotate.

[0058] In some embodiments, a portion of the first tooth 211 is lower in height, and along the circumferential direction of the first gear 21, the lower-height first tooth 211 is located between the two higher-height first teeth 211, and the toothless portion 212 is located between the two higher-height first teeth 211, and along the height direction of the manual retraction structure 100, the toothless portion 212 is located below the lower-height first tooth 211.

[0059] See Figure 1 As shown, in some embodiments, the jaw drive assembly 3 includes a sleeve 30, which moves forward and backward. The sleeve 30 is connected to the jaws 200 to realize the closing and opening of the jaws 200.

[0060] In some embodiments, the cutting blade drive assembly 4 includes a spindle 42 that connects the rack 41 to the cutting blade. The rack 41 carries the spindle 42 forward and backward, and the spindle 42 carries the cutting blade to fire and retract.

[0061] In some embodiments, the mandrel 42 is located inside the sleeve 30.

[0062] In some embodiments, the closing and opening of the jaws 200 can also be achieved by the forward and backward movement of the second rack (not shown).

[0063] See Figures 2 to 7 In some embodiments, the jaw drive assembly 3 includes a limiting member 31, a first pushing member 32, and a second pushing member 33. The limiting member 31 is provided with a receiving space 311 and a plurality of sliding grooves 312 arranged along the circumferential direction of the receiving space 311 and communicating with the receiving space 311.

[0064] In some embodiments, the first pusher 32 includes a plurality of first helical teeth 321. The second pusher 33 includes a plurality of sliders 331 and a plurality of second helical teeth 332 that engage with the plurality of first helical teeth 321.

[0065] In some embodiments, the first pushing member 32 includes a first columnar portion 322 and a rod-shaped portion 323 connected to the first columnar portion 322. The first helical tooth 321 is disposed at the free end of the first columnar portion 322.

[0066] In some embodiments, the second pusher 33 includes a second columnar portion 334, and the second helical tooth 332 and the slider 331 are disposed on the second columnar portion 334.

[0067] In some embodiments, the first columnar portion 322 forms a cavity 3221, and the free end of the second columnar portion 334 is assembled in the cavity 3221 to prevent the second pusher 33 from disengaging from the first pusher 32 and to ensure that the first pusher 32 and the second pusher 33 smoothly abut against each other.

[0068] See Figures 8 to 9 In the open state, at least a portion of the second pusher 33 is located within the receiving space 311, and the slider 331 is located within the groove 312. See also: Figures 10 to 11 The first pushing member 32 is forced against the second pushing member 33. After the slider 331 moves along the slide groove 312 and moves out of the slide groove 312, see [link to previous section]. Figures 12 to 14 The second pusher 33 rotates so that the slider 331 deviates from the groove 312, and the second pusher 33 abuts against the limiting member 31 so that the jaws 200 switch and lock in the closed state.

[0069] See Figures 12 to 14 In the closed state, the first pusher 32 is forced to push against the second pusher 33. Figures 10 to 11 In the open state, the second pusher 33 rotates, causing the slider 331 to enter the groove 312, and the jaws 200 switch to the open state. Figures 8 to 9 The state.

[0070] The manual retraction structure 100 of this application, through the setting of the limiting member 31, the first pushing member 32 and the second pushing member 33, the first pushing member 32 abuts against the second pushing member 33 to make it move forward and backward. When the second pushing member 33 moves forward and abuts against the limiting member 31, the jaws 200 can be locked in a closed state. There is no need to set up a complex locking structure. The manual retraction structure is not only simple in structure, but also has good reliability, which can prevent the jaws 200 from opening accidentally.

[0071] See Figures 4 to 5 and Figure 8 The manual retraction structure 100 includes a housing 5, and the transmission mechanism 2 is rotatably disposed on the housing 5.

[0072] In some embodiments, the transmission mechanism 2 is located within the space enclosed by the housing 5.

[0073] In some embodiments, the manual retraction structure 100 includes a first shaft portion 210, a second shaft portion 220, and a third shaft portion 230 fixed to the housing 5. The first gear 21 is rotatably mounted on the first shaft portion 210, the second gear 22 is rotatably mounted on the second shaft portion 220, and the connecting member 26 is rotatably mounted on the third shaft portion 230.

[0074] See Figures 4 to 5 In some embodiments, the limiting member 31 is part of the housing 5, which encloses the receiving space 311 and is provided with the sliding groove 312. The manual retraction structure 100 not only has a simple structure and reduces the number of parts, but also omits the step of assembling the limiting member 31. Optionally, the limiting member 31 can also be assembled and fixed with the housing 5.

[0075] The jaw drive assembly 3 includes a top block 34, the sleeve 30 is fixed to the top block 34, and the second pusher 33 is rotatably connected to the top block 34 and can abut against the top block 34 to make it move forward and backward.

[0076] In some embodiments, the top block 34 is provided with a through hole 341 for the mandrel 42 to pass through.

[0077] In some embodiments, the housing 5 is further provided with a receiving cavity 51, and the top block 34 clamps within the receiving cavity 51 and is movable along the receiving cavity 51.

[0078] In some embodiments, the manual retraction structure 100 includes an elastic device 6, which is compressed when the second pusher 33 moves out of the receiving space 311, and the elastic force of the elastic device 6 causes the second pusher 33 to enter the receiving space 311.

[0079] In some embodiments, the elastic device 6 is located within the receiving cavity 51, and the opposite ends of the elastic device 6 abut against the top block 34 and the housing 5, respectively. When the first pusher 32 abuts against the second pusher 33, the top block 34 advances along the receiving cavity 51 and squeezes the elastic device 6, and the elastic device 6 provides a pushing force for the top block 34 to retract.

[0080] In some embodiments, the elastic device 6 may be a spring or other elastic body.

[0081] See Figure 9 In some embodiments, the top block 34 is provided with a rotating shaft 342, and the second pusher 33 is provided with a receiving groove 333. The rotating shaft 342 is received in the receiving groove 333 to limit the second pusher 33 and prevent it from falling off.

[0082] See Figure 3 and Figure 15 In some embodiments, the manual retraction structure 100 includes a stop member 7, which can switch between a stop position and a non-stop position. In the stop position, the stop member 7 abuts against the first push member 32 to move the second push member 33; in the non-stop position, the stop member 7 disengages from abutting against the first push member 32.

[0083] In some embodiments, the power unit 1 drives the abutting member 7 to switch between the abutting position and the non-abutting position.

[0084] In some embodiments, the first gear 21 rotates the abutting member 7 to switch between the abutting position and the non-abutting position.

[0085] In some embodiments, the first gear 21 may be omitted, and the abutment 7 and the second gear 22 may be driven by different power sources.

[0086] In some embodiments, the abutting member 7 is integrally formed with the first gear 21, resulting in a simpler structure; alternatively, the abutting member 7 and the first gear 21 can also be separately formed.

[0087] In some embodiments, the first gear 21 is provided with a first hole 213, and the abutment 7 is provided with a second hole 71. The first hole 213 and the second hole 71 are aligned so that the first shaft portion 210 passes through, thereby enabling the first gear 21 and the abutment 7 to rotate relative to the housing 5.

[0088] In some embodiments, the first free end 73 of the abutment 7 and the second free end 3231 of the first pusher 32 are both arc-shaped to ensure that the abutment 7 can abut against the first pusher 32 during rotation, so as to make it move forward.

[0089] See Figures 8 to 15 In the initial state, the jaws 200 of the anastomosis device 300 of this application are in an open state. At this time, the power device 1 is activated, and the power device 1 rotates clockwise in a first direction to drive the fifth gear 25 to rotate. The fifth gear 25 drives the fourth gear 24 and the third gear 23 to rotate, and the third gear 23 drives the first gear 21 to rotate until the abutment 7 abuts against the first pusher 32.

[0090] During this process, the second tooth 221 of the second gear 22 engages with the toothless part 212 of the first gear 21, and the second gear 22 does not rotate, that is, the cutting blade stops moving.

[0091] When the abutting member 7 abuts against the first pushing member 32, the first pushing member 32 abuts against the second pushing member 33. After the slider 331 moves along the slide groove 312 and moves out of the slide groove 312, the second pushing member 33 rotates, causing the slider 331 to deviate from the slide groove 312 and abut against the limiting member 31, so that the jaws 200 are locked in the closed state. At this time, as the first gear 21 continues to rotate, the first tooth 211 meshes with the second tooth 221, the first gear 21 drives the second gear 22 to rotate, the second gear 22 drives the rack 41 forward, and the cutting blade fires.

[0092] After firing, the power unit 1 reverses in a second direction opposite to the first direction. During this process, the first gear 21 rotates along the second gear 22 to retract the cutting blade. After the cutting blade retracts, the toothless part 212 of the first gear 21 engages with the second gear 22. As the first gear 21 continues to rotate, the second gear 22 does not rotate. When the first gear 21 rotates to the point where the abutment 7 abuts against the first pusher 32, the first pusher 32 abuts against the second pusher 33. The second pusher 33 rotates so that the slider 331 enters the groove 312, and the jaws 200 switch to the open state, that is, the stapler 300 returns to its initial state.

[0093] exist Figure 8 In this application, the first direction is counterclockwise and the second direction is clockwise. This application does not limit the first direction.

[0094] See Figures 16 to 24 The manual retraction mechanism 100 can switch between electric and manual modes. When the electric mode of the manual retraction mechanism 100 fails, the jaws 200 can still be opened and the cutting blade can be retracted in manual mode, thus further improving the safety of the manual retraction mechanism 100 and preventing medical accidents.

[0095] In the electric mode, the fourth tooth 241 of the fourth gear 24 meshes with the fifth tooth 251 of the fifth gear 25. In the manual mode, the fourth tooth 241 of the fourth gear 24 disengages from the fifth tooth 251 of the fifth gear 25. An external operating component can be assembled on the connecting member 26. By manually operating the external operating component, the external operating component rotates the third gear 23, which in turn rotates the first gear 21, thereby realizing the operation of the manual retraction structure 100.

[0096] In some implementations, when the electric motor fails, pressing down on the connector 26 switches to the manual mode, and the fourth gear 24 moves downward to disengage from the fifth gear 25.

[0097] In some embodiments, the manual retraction structure 100 further includes a stop 81, which is located above the connector 26 in the manual mode to prevent it from moving upward and ensure that the manual retraction structure 100 remains in the manual mode.

[0098] The stop member 81 is movable between a first position and a second position. In the first position, the stop member 81 is located above the connector 26, and the manual retraction structure 100 is in manual mode; in the second position, the stop member 81 is located on one side of the connector 26, and the manual retraction structure 100 is in electric mode.

[0099] In some embodiments, the manual retraction structure 100 further includes a second elastic member 82, one end of which abuts against the stop member 81 and the other end of which abuts against the housing 5, to ensure that the stop member 81 remains in the first position.

[0100] When the stopper 81 moves from above the connector 26 to the second position, the stopper 81 presses against the second elastic member 82. When the connector 26 is pressed down to the first position, the elastic force of the second elastic member 82 abuts against the stopper 81, causing it to move above the connector 26.

[0101] In some embodiments, the second elastic element 82 may be a torsion spring or other elastic body.

[0102] In some embodiments, the stop member 81 is rotatably connected to the housing 5. The stop member 81 has a base 811 and a pair of ears 812 extending from the base 811. The pair of ears 812 are respectively provided with first assembly holes 8121. The housing 5 is provided with a second assembly hole 52. The manual retraction structure 100 further includes a first limiting shaft 83, which passes through the first assembly hole 8121 and is assembled in the second assembly hole 52 to realize the rotation of the stop member 81.

[0103] The second elastic member 82 includes an assembly portion 821 and a first abutment portion 822 and a second abutment portion 823 disposed on the assembly portion 821. The assembly portion 821 is provided with a third assembly hole 8211 for the first limiting shaft 83 to pass through. The assembly portion 821 is located between the pair of ears 812, the first abutment portion 822 abuts against the base portion 811, and the second abutment portion 823 abuts against the housing 5.

[0104] In some embodiments, the base 811 is provided with a first groove 8111, the housing 5 is provided with a second groove 53, the first abutment 822 is located in the first groove 8111 to prevent the first abutment 822 from displacing and to ensure that the first abutment 822 abuts against the base 811; the second abutment 823 is located in the second groove 53 to prevent the second abutment 823 from displacing and to ensure that the second abutment 823 abuts against the housing 5.

[0105] In some embodiments, the housing 5 is provided with a third groove 54, and when the abutment 81 is located above the connector 26, the free end 8112 of the base 811 is located in the third groove 54 to ensure that the abutment 81 remains above the connector 26.

[0106] See Figures 16 to 17 In some embodiments, the manual retraction structure 100 further includes a first elastic element 84. When the connecting member 26 moves downward, it presses against the first elastic element 84, and the pushing force of the first elastic element 84 pushes the connecting member 26 upward, causing it to move upward.

[0107] When the connector 26 is pressed downwards, it compresses the first elastic member 84. When the abutment 81 moves away from the top of the connector 26, the elastic force of the first elastic member 84 pushes the connector 26 upwards, causing the fourth tooth 241 of the fourth gear 24 to mesh with the fifth tooth 251 of the fifth gear 25, and the stapler 300 returns to the electric mode. The first elastic member 84 ensures that the stapler 300 remains in the electric mode, ensuring the normal operation of the stapler 300.

[0108] In some embodiments, the first elastic element 84 may be a spring or other elastic body.

[0109] In some embodiments, the top end of the connector 26 may be used to assemble an external operating element to rotate the connector 26 and the third gear 23.

[0110] See Figures 22 to 24 In some embodiments, the connector 26 is provided with an operating hole 261 for the end of the external operating member to be inserted to rotate the connector 26. Optionally, the top end of the connector 26 may also be assembled into the hole of the external operating member.

[0111] In some embodiments, the shape of the operating hole 261 matches the shape of the end of the operating member, both being irregularly shaped, to ensure that the external operating member can rotate with the connecting member 26.

[0112] In some embodiments, the manual retraction structure 100 includes a fixing member 9 sleeved on the connecting member 26, the connecting member 26 being rotatable relative to the fixing member 9. When the abutment 81 is in the second position, the abutment 81 abuts against the fixing member 9.

[0113] In some embodiments, the fastener 9 includes a rib 91. The housing 5 has a receiving hole 55 and a groove 56 communicating with the receiving hole 55. The fastener 9 is received in the receiving hole 55, and the rib 91 is received in the groove 56 and is movable along the groove 56. The rib 91 prevents the fastener 9 from rotating when the connector 26 is pressed down, and at the same time provides guidance for the vertical movement of the connector 26.

[0114] In some embodiments, the top end of the connector 26 is provided with a shoulder 262. The fixing member 9 is located between the shoulder 262 and the fourth gear 24. The shoulder 262 prevents the fixing member 9 from detaching upward from the connector 26.

[0115] In some embodiments, the connector 26 includes a first connector 263 and a second connector 264 fixed together, the third gear 23 and the fourth gear 24 are integrally formed with the first connector 263, and the shoulder 262 is disposed on the second connector 264 to facilitate the assembly of the fastener 9.

[0116] In some embodiments, the first elastic element 84 surrounds the periphery of the third shaft portion 230.

[0117] In some embodiments, the fourth gear 24 is provided with a recess 242, and the top end of the first elastic member 84 is received in the recess 242 to increase the stability of the first elastic member 84.

[0118] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A manual tool retraction structure, characterized in that, include: The device includes a power unit, a jaw drive assembly, a cutting blade drive assembly, a first gear, a third gear, a fourth gear, a fifth gear, and a connecting member. The third gear and the fourth gear are connected via the connecting member. The power unit drives the fifth gear to rotate, and the third gear drives the first gear to rotate. When the first gear rotates, it moves the jaw drive assembly and / or the cutting blade drive assembly. The manual blade retraction mechanism can switch between electric and manual modes. In electric mode, the fifth gear meshes with the fourth gear. In manual mode, the fourth gear disengages from the fifth gear. When the connecting member is pressed downwards, the manual blade retraction mechanism switches to manual mode. The manual retraction structure further includes a housing, a stop member, a second elastic member, and a first limiting shaft. In manual mode, the stop member is located above the connector to prevent it from moving upward. The second elastic member abuts against the stop member to keep it above the connector. The stop member includes a base and a pair of ears extending from the base. The pair of ears are respectively provided with a first assembly hole. The housing is provided with a second assembly hole. The second elastic member is provided with a third assembly hole. The first limiting shaft passes through the first assembly hole and the third assembly hole and is assembled in the second assembly hole. The base is provided with a first groove. The housing is provided with a second groove. One end of the second elastic member is received in the first groove, and the other end is received in the second groove.

2. The manual retraction structure according to claim 1, characterized in that, The top of the connector can be used to assemble an external operating component to rotate the connector and the third gear.

3. The manual retraction structure according to claim 2, characterized in that, The connector is provided with an operating hole for the insertion of the end of the external operating component.

4. The manual retraction structure according to claim 2, characterized in that, The manual retraction structure includes a first elastic element. When the connecting member moves downward, it squeezes the first elastic element, and the pushing force of the first elastic element pushes the connecting member upward, causing it to move upward.

5. The manual retraction structure according to claim 1, characterized in that, The manual retraction mechanism also includes a second gear, which meshes with the first gear and moves the cutting blade drive assembly.

6. The manual retraction structure according to claim 1, characterized in that, The connector and the stop are rotatably disposed on the housing. In the electric mode, the stop rotates to one side of the connector.

7. The manual retraction structure according to claim 6, characterized in that, One end of the second elastic member abuts against the blocking member, and the other end abuts against the housing.

8. The manual retraction structure according to claim 7, characterized in that, The manual retraction structure also includes a fixing member sleeved on the connecting member, the connecting member being rotatable relative to the fixing member, and in the electric mode, the blocking member blocking the fixing member.

9. The manual retraction structure according to claim 8, characterized in that, The fastener includes a rib, the housing has a receiving hole and a groove communicating with the receiving hole, the fastener is received in the receiving hole, and the rib is received in the groove and can move along the groove.

10. An electric stapler, characterized in that, The device includes jaws, a cutting blade, and a manual blade retraction structure as described in any one of claims 1 to 9, wherein the jaws are connected to the jaw drive assembly, and the cutting blade is connected to the cutting blade drive assembly.

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