Transmission device of linear cutting stapler and linear cutting stapler

Abstract

The present invention belongs to the field of medical devices, and more particularly, relates to a transmission device of a linear cutting stapler and a linear cutting stapler. In the stapler, in the present invention, the top ends of the input shaft, the output shaft and the closing screw are positioned and fixed to the main support, and at the same time, the bottom end of the closing screw is positioned and fixed by the input shaft seat, so that the positioning and installation of these three rotating parts are more convenient and accurate, and more stable during use. By setting up a parallel closing device, the nail magazine bracket and the nail anvil bracket are parallel and stable when opening and closing, and in particular, the mechanism for realizing the transmission device does not need to take into account the requirements of closing stability, which can simplify the design of the transmission device, making the linear cutting and stapling structure simpler, more compact, low-cost, and suitable for mass production.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a transmission device of a linear cutting stapler and the linear cutting stapler. Background Art

[0002] In a linear cutting stapler, the transmission device is used to transmit the power of the motor to each execution terminal, which is used to control the opening and closing of the stapler anvil and the firing of the staples. Each rotating part in the transmission device needs to be supported. How to accurately position and maintain stability during use is one of the technical problems that need to be solved in this field. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the existing technical problems, the present invention provides a transmission device of a linear cutting stapler and a linear cutting stapler, wherein a rotating part can be accurately positioned and the linear cutting stapler can operate stably.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] The present invention provides a transmission device of a linear cutting stapler, comprising an input shaft, an input shaft seat, an output shaft, an output shaft seat, a closing screw, a closing nut, a transmission mechanism and a main support; the input shaft seat and the output shaft seat are positioned and fixed on the main support; the input shaft and the output shaft are rotatably supported on the input shaft seat and the output shaft seat respectively; the axis of the closing screw is perpendicular to the axis of the input shaft, the top end of the closing screw is rotatably supported on the main support, and the bottom end is rotatably supported on the input shaft seat; the closing nut is screwed on the closing screw; the transmission mechanism is connected to the input shaft, the closing screw and the output shaft, and can selectively convert the rotation of the input shaft into the rotation of the closing screw and the output shaft.

[0008] Preferably, the main support includes two side plates and a connecting plate, the two side plates are separated on both sides of the input shaft, and the connecting plate is connected between the two side plates; the top end of the closing screw is rotatably supported on the connecting plate; the two sides of the input shaft seat and the output shaft seat are respectively fixed to the two side plates.

[0009] Preferably, the transmission mechanism includes an output sleeve, an output sleeve seat and a switching sleeve; the two sides of the output sleeve seat are respectively positioned and fixed to the two side plates; the output sleeve is rotatably supported on the output sleeve seat, the output sleeve is rotatably sleeved on the outside of the input shaft, and the output sleeve is drivingly connected to the closing screw; the switching sleeve is sleeved on the outside of the input shaft, and the switching sleeve is connected to the input shaft in a manner that can be driven to rotate and the switching sleeve can axially move between a first position and a second position; when the switching sleeve is in the first position, the switching sleeve is connected to the output sleeve in a manner that is driven to rotate, and the switching sleeve is separated from the output shaft; when the switching sleeve is in the second position, the switching sleeve is separated from the output sleeve, and the switching sleeve is connected to the output shaft in a manner that is driven to rotate.

[0010] Preferably, the output shaft is arranged on one axial side of the input shaft and is spaced apart from the input shaft.

[0011] Preferably, the input shaft, the output sleeve, the switching sleeve and the output shaft are coaxially arranged.

[0012] Preferably, the switching sleeve is sleeved outside the input shaft and the output shaft in both the first position and the second position.

[0013] Preferably, the input shaft seat, the output shaft seat and the output sleeve seat are all rectangular parallelepiped or cubed; and the side plate has a plane abutting against the input shaft seat, the output shaft seat and the output sleeve seat.

[0014] Preferably, the side plate includes a vertical plate and a side plate, the side plate is connected to the lower rear side of the vertical plate, and a boss is formed on the inner wall of the vertical plate; the connecting plate is supported on the upper end surface of the boss, and is positioned and fixed to the portion of the vertical plate located above the boss; the input shaft seat and the output sleeve seat are positioned and fixed to the portion of the vertical plate located below the boss, and the output shaft seat is positioned and fixed to the side plate.

[0015] Preferably, the input shaft seat, the output shaft seat and the output sleeve seat are all rectangular or cubed; the side plate has a plane that abuts the input shaft seat, the output sleeve seat and the anvil bracket of the linear cutting stapler, the output shaft seat is positioned and fixed inside the anvil bracket, and the anvil bracket is positioned and fixed on the inner side of the side plate.

[0016] Preferably, the side plate includes a vertical plate and a side plate, the side plate is connected to the lower rear side of the vertical plate, and a boss is formed on the inner wall of the vertical plate; the connecting plate is supported on the upper end surface of the boss, and is positioned and fixed to the part of the vertical plate located above the boss; the input shaft seat and the output sleeve seat are positioned and fixed to the part of the vertical plate located below the boss, and the anvil bracket is positioned and fixed to the side plate.

[0017] Preferably, the output shaft is located on the rear side of the input shaft, and the switching sleeve is located on the rear side of the output sleeve; a switching slider that can move axially and radially is connected to the input shaft, and the switching slider is connected to the switching sleeve in a manner of moving axially together and rotating together around the axis of the input shaft, and at least one of the two radial ends of the switching slider protrudes to the outside of the input shaft; at least two driving blocks arranged at intervals along the circumference are provided on the hole wall of the output sleeve, and any two driving blocks are staggered relative to the diameter; at least two stoppers arranged at intervals along the circumference are provided on the inner wall of the rear end of the switching sleeve, and any two stoppers are staggered along the diameter; a radially movable transmission slider is provided on the output shaft, and at least one of the two radial ends of the transmission slider protrudes to the outside of the output shaft; when the switching sleeve is in the first position, the switching slider corresponds to the driving block in the circumferential direction, and the stopper is located in front of the transmission slider; when the switching sleeve is in the second position, the switching slider is located on the rear side of the driving block, and the stopper corresponds to the transmission slider in the circumferential direction.

[0018] Preferably, the front end of the switching slider is gradually reduced, and the rear end inner wall of the driving block is tilted backward and outward to form an inclined plane; the rear end inner wall of the stopper is tilted backward and outward to form an inclined plane, and the front end of the transmission slider is gradually reduced.

[0019] Preferably, a strip groove is provided on the input shaft, the length direction of the strip groove is parallel to the axial direction of the input shaft, the strip groove runs through the radial direction of the input shaft, and the input shaft is provided with two strip grooves separated on both sides of the strip groove, and the length direction of the two strip grooves is along the axial direction of the input shaft; the switching slider is inserted in the strip groove, and a strip hole is provided on the switching slider, and the length direction of the strip hole is along the radial direction of the input shaft, a rod body passes through the strip hole and the two ends of the rod body pass through the two strip grooves; a radially through slide groove is provided on the output shaft, and the output shaft is provided with two supporting holes separated on both sides of the slide groove, and a strip hole is provided on the transmission slider, and the length direction of the strip hole is along the radial direction of the output shaft, a rod passes through the strip hole and the two ends of the rod are supported on the two supporting holes.

[0020] Preferably, the transmission mechanism also includes a switching drive member, which includes a connected toggle member and a coupling plate; an annular groove or an annular protrusion is provided on the outer wall of the switching sleeve, and the coupling plate has a groove end matching the shape of the annular groove or the annular protrusion, and the groove end is relatively rotatably plugged into the annular groove or the annular protrusion.

[0021] Preferably, the transmission mechanism further comprises a switching drive member, the switching drive member comprises a toggle member, a slideway is provided on the main support, and the outer end of the toggle member extends from the slideway to the outside of the main support.

[0022] Preferably, the slideway extends in the axial direction of the input shaft.

[0023] Preferably, the slide includes a first slide section and a second slide section connected end to end, the first slide section extends axially along the input shaft, the second slide section is perpendicular to the first slide section, and the position and length of the first slide section are constructed so that the sliding of the switching drive member in the first slide section can drive the switching sleeve to move between the first position and the second position.

[0024] Preferably, the slide includes a first slide section, a second slide section and a third slide section which are connected end to end, the first slide section and the third slide section extend axially along the input shaft, the second slide section is perpendicular to the first slide section and the third slide section, and the tail of the third slide section faces the head side of the first slide section, the position and length of the first slide section are configured so that the sliding of the switching drive member in the first slide section can drive the switching sleeve to move between the first position and the second position, and the position and length of the third slide section are configured so that when the switching drive member stays at the tail of the third slide section, the switching sleeve remains connected to the output shaft in a driving rotation manner.

[0025] Preferably, a mounting hole connected to the top end of the closing screw via a bearing is provided on the connecting plate.

[0026] On the other hand, the present invention provides a linear cutting stapler, comprising a staple magazine support, a staple anvil support and a firing screw, and also comprising a parallel closing device and any one of the above-mentioned transmission devices; the parallel closing device is connected to the staple magazine support or is connected to the staple magazine support and the staple anvil support at the same time in a manner that the staple magazine support and the staple anvil support are parallel when opening and closing; the main support is connected to the parallel closing device; the closing nut is connected to the staple magazine support; and the output shaft is connected to the firing screw.

[0027] Preferably, the parallel closing device comprises two groups of link mechanisms, each group of link mechanisms comprises a first link and a second link which are hinged to each other, the first link and the second link are of equal length, and the hinge point of the first link and the second link is located at the length center of the first link and the second link.

[0028] Preferably, one end of the first link in the two groups of link mechanisms is hinged to the anvil bracket through two connecting pins, and the other end of the first link in the two groups of link mechanisms is rotatably and slidably connected to the nail magazine bracket through the same connecting pin; one end of the second link in the two groups of link mechanisms is hinged to the nail magazine bracket through the same connecting pin, and the other end of the second link in the two groups of link mechanisms is rotatably and slidably connected to the anvil bracket through the same connecting pin; the connecting pin connecting the first link and the anvil bracket is rotatably penetrated on the side plate; the position where the first link is connected to the anvil bracket is located at the far side of the position where the second link is connected to the anvil bracket.

[0029] Preferably, one end of the first link in the two groups of link mechanisms is rotatably and slidably connected to the anvil bracket through two connecting pins, and the other end of the first link in the two groups of link mechanisms is hinged to the nail magazine bracket through the same connecting pin; one end of the second link in the two groups of link mechanisms is rotatably and slidably connected to the nail magazine bracket through the same connecting pin, and the other end of the second link in the two groups of link mechanisms is hinged to the anvil bracket through the same connecting pin; the connecting pin connecting the first link and the anvil bracket is rotatably penetrated on the side plate; the position where the first link is connected to the anvil bracket is distal to the position where the second link is connected to the anvil bracket.

[0030] (III) Beneficial effects

[0031] The beneficial effects of the present invention are:

[0032] The transmission device of the present invention positions and fixes the top ends of the input shaft, output shaft and closing screw on the main support, while the bottom end of the closing screw is positioned and fixed by the input shaft seat, making the positioning and installation of the three rotating parts more convenient and accurate, and more stable during use.

[0033] The linear cutting stapler of the present invention has the above-mentioned transmission device, and the positioning and installation of the rotating parts are more convenient and accurate, and more stable during use. At the same time, by setting the parallel closing device, the staple magazine bracket and the staple anvil bracket are parallel and stable when opening and closing. In particular, the transmission device does not need to take into account the requirements of closing stability, which can simplify the design of the transmission device, making the linear cutting stapler structure simpler, more compact, low-cost, and suitable for mass production.

[0034] Furthermore, the input shaft, the output sleeve, the switching sleeve and the output shaft are coaxially arranged and equipped with corresponding switching structures, so that the structure of the linear cutting stapler is simpler, the radial area is smaller, and it is easier to grasp and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an exploded schematic diagram of the linear cutting stapler provided in Example 1, wherein the handle of the linear cutting stapler is not shown; Figure 2 This is an exploded schematic diagram of the stapler device of the linear cutting stapler in Example 1; Figure 3 This is an exploded schematic diagram of the transmission device of the linear cutting stapler in Example 1; Figure 4 for Figure 1 A schematic partial cross-sectional view of the linear cutting stapler in the embodiment of the present invention when the switching sleeve is located in the first position; Figure 5 for Figure 1 A schematic partial cross-sectional view of the linear cutting stapler in the embodiment of the present invention when the switching sleeve is located in the second position; Figure 6 for Figure 1 An exploded schematic diagram of the main support of the linear cutting stapler; Figure 7 This is an exploded schematic diagram of the main stent in the linear cutting stapler provided in Example 2; Figure 8 is a front schematic view of the linear cutting stapler provided in Example 2, wherein the handle of the linear cutting stapler is not shown; Fig. 9 It is a schematic partial cross-sectional front view of the linear cutting stapler provided in Example 3 when the switching sleeve is located in the first position; Fig.10 for Fig. 9 A schematic partial cross-sectional view of a linear cutting stapler when the switching sleeve is in the second position. Fig.11 It is a partial cross-sectional schematic diagram of a front view of the linear cutting stapler provided in Example 4 when the switching sleeve is located in the first position; Fig.12 It is a partial cross-sectional schematic diagram of a front view of the linear cutting stapler provided in Example 4 when the switching sleeve is located at the second position; Fig.13 It is a schematic structural diagram of the parallel closing device of the linear cutting stapler provided in Example 7; Fig.14 This is a schematic structural diagram of the guide mechanism of the linear cutting stapler provided in Example 8; Fig.15 This is a schematic diagram of the structure of the guide mechanism of the linear cutting stapler provided in Example 9.

[0036] [Description of Reference Numerals]

[0037] 1: Nail magazine device; 101: Nail magazine; 102: Nail magazine bracket; 1021: Mounting hole; 103: Nail anvil; 104: Nail anvil bracket; 1041: Long fixing ear; 1042: Short fixing ear; 1043: Long slot; 1044: Round hole; 105: Firing screw; 106: Firing nut; 1061: Blade; 1062: Nail pusher; 107: Link mechanism; 1071: First link; 1072: Second link; 108: Guide mechanism; 1081: U-shaped frame; 1082: Vertical guide rail; 1083: Slider; 109: Guide mechanism; 1091: Slide rail; 1092: Slider; 110: First bending frame; 111: Second bending frame; 2: Transmission device ; 201: input shaft; 2011: first input shaft section; 2012: second input shaft section; 2013: third input shaft section; 2014: annular protrusion; 2015: strip groove; 2016: strip groove; 2018: second arched engagement groove; 202: input shaft bearing; 203: input shaft seat; 2031: annular step; 2032: annular rib; 204: output sleeve; 2041: drive block; 2042: first arched engagement groove; 2043: first groove; 205: output sleeve sleeve; 206: output sleeve seat; 207: output shaft; 2071: first output shaft section; 2072: second output shaft section; 2073: third output shaft Shaft section; 2074: support hole; 2075: slide groove; 2076: step surface; 2077: axial plug hole; 2078: third arched joint groove; 208: output shaft bearing; 209: output shaft seat; 210: switching sleeve; 2101: slot; 2102: stopper; 2103: annular protrusion; 2104: first mounting hole; 2105: first arched snap buckle; 2106: second mounting hole; 2107: second arched snap buckle; 2108: protrusion; 211: switching slider; 2111: strip hole; 212: transmission slider; 2121: strip hole; 213: switching drive member; 2131: joint piece; 2132: toggle member; 214: C-shaped retaining ring; 21 5: rod body; 216: rod; 217: output shaft sleeve; 2171: second groove; 301: first bevel gear; 302: second bevel gear; 303: closing screw; 304: closing nut: 305: bearing; 4: main support; 401: side plate; 4011: vertical plate; 4012: side plate; 4013: rectangular base plate; 4014: boss; 4015: connecting plate fixing hole; 4016: input shaft seat fixing hole; 4017: output sleeve seat fixing hole; 4018: output shaft seat fixing hole; 4019: fixing ear; 4020: slideway; 40201: first slideway section; 40202: second slideway section; 40203: third slideway section; 402: connecting plate. DETAILED DESCRIPTION

[0038] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. The side closer to the doctor during use is referred to as "near", the side closer to the patient is referred to as "far", and the direction from "near" to "far" is referred to as the direction from "front" to "back".

[0039] Example 1

[0040] Reference Figures 1 to 6 This embodiment provides a linear cutting stapler, which includes a stapler device 1, a transmission device 2, a parallel closing device and a power source.

[0041] The nail magazine device 1 includes a nail magazine 101, a nail magazine support 102, a nail anvil 103, a nail anvil support 104, a firing screw 105 and a firing nut 106. The nail magazine 101 is supported on the nail magazine support 102, and the nail anvil 103 and the firing screw 105 are supported on the nail anvil support 104. The distance between the nail magazine support 102 and the nail anvil support 104 determines the distance between the nail magazine 101 and the nail anvil 103. Therefore, the distance between the nail magazine 101 and the nail anvil 103 is controlled by driving the distance between the nail magazine support 102 and the nail anvil support 104 to change, that is, the closing and opening actions of the nail magazine 101 and the nail anvil 103. The firing nut 106 is sleeved on the firing screw 105, and the bidirectional rotation of the firing screw 105 is converted into the bidirectional axial movement of the firing nut 106 to complete the firing action.

[0042] In this embodiment, the firing nut 106 includes a square main body portion and a nail pushing block 1062 connected to the square main body portion, the nail pushing block 1062 is used to push the slider in the nail magazine 101 to complete the nailing of the U-shaped suture nails, the square main body portion has a threaded hole that is screwed with the firing screw 105, the square design of the main body portion is conducive to limiting the firing nut 106 to move only in the axial direction, and a blade 1061 is provided above the square main body portion for cutting tissue.

[0043] The other structures of the staple cartridge mechanism 1 are prior art and will not be described in detail here.

[0044] The power source is a device that provides rotational power, and a motor is generally selected.

[0045] The transmission device 2 is used to selectively convert the rotation of the power source into the closing and opening power of the nail magazine 101 and the nail anvil 103 and the firing power.

[0046] Specifically, the transmission device 2 of this embodiment includes an input shaft 201, two input shaft bearings 202, an input shaft seat 203, an output sleeve 204, an output sleeve bushing 205, an output sleeve seat 206, an output shaft 207, an output shaft bearing 208, an output shaft seat 209, a switching sleeve 210, a switching slider 211, a transmission slider 212, a switching drive 213, a first bevel gear 301, a second bevel gear 302, a closing screw 303, a closing nut 304 and a main support 4.

[0047] The main support 4 includes two parallel side panels 401 and a connecting plate 402. The side panels 401 include a vertical panel 4011 and a side panel 4012, and the side panel 4012 is connected to the lower rear side of the vertical panel 4011, so that the side panels 401 are formed into an L shape as a whole. The two side panels 401 are arranged at intervals, and the connecting plate 402 is connected between the upper parts of the vertical panels 4011 of the two side panels 401.

[0048] The vertical plate 4011 includes a rectangular base plate 4013 and a boss 4014. The inner wall and the outer wall of the rectangular base plate 4013 are both planes. The boss 4014 is connected to the upper middle part of the inner wall of the rectangular base plate 4013. The portion of the rectangular base plate 4013 above the boss 4014 is provided with two connecting plate fixing holes 4015 arranged along the axial direction (i.e., the axial direction of the input shaft 201, the input shaft 201 will be described in detail later). Two connecting plate fixing holes 4015 are shown in this embodiment. The connecting plate 402 is supported on the upper end surface of the boss 4014 in the two vertical plates 4011, and the two side walls of the connecting plate 402 have multiple fixing holes. The fixing holes on the connecting plate 402 and the vertical plate 4011 are connected by fixing pins to position and fix the connecting plate 402 and the two side plates 401. The connecting plate 402 is perpendicular to the two side plates 401.

[0049] The shape of the input shaft seat 203 is a rectangular parallelepiped, and the length direction is along the axial direction. Of course, it can also be preferably a cube. The two side walls of the input shaft seat 203 are each arranged with a plurality of fixing holes along the axial direction, and in this embodiment, there are two fixing holes on each side. A plurality of input shaft seat fixing holes 4016 are provided on the portion of the vertical plate 4011 of the main support 4 located below the boss 4014. The input shaft seat 203 is positioned and fixed by a fixing pin passing through the fixing holes on the input shaft seat 203 and the input shaft seat fixing holes 4016 on the vertical plate 4011. At the same time, the two flat side walls of the input shaft seat 203 also abut against the planes on the two vertical plates 4011.

[0050] The input shaft 201 includes a first input shaft segment 2011, a second input shaft segment 2012 and a third input shaft segment 2013 which are connected in sequence from near to far and are coaxial. The diameter of the first input shaft segment 2011 is smaller than the diameter of the second input shaft segment 2012, the diameter of the second input shaft segment 2012 is larger than the diameter of the third input shaft segment 2013, and the diameter of the first input shaft segment 2011 is equal to the diameter of the third input shaft segment 2013.

[0051] The proximal end of the first input shaft segment 2011 is used to connect with the power source. Of course, in other embodiments, the input shaft itself can be the output shaft of the power source. A C-shaped retaining ring 214 is provided at the connection between the first input shaft segment 2011 and the second input shaft segment 2012, and the C-shaped retaining ring 214 is fixed on the input shaft seat 203. An input shaft bearing 202 is supported in the input shaft seat 203, and an annular protrusion 2014 is provided on the second input shaft segment 2012. An annular step 2031 is provided on the inner wall of the input shaft seat 203 at a position corresponding to the annular protrusion 2014, and the input shaft bearing 202 is axially limited between the C-shaped retaining ring 214 and the annular protrusion 2014 and the annular step 2031. A transition surface is formed between the second input shaft segment 2012 and the third input shaft segment 2013, and an annular retaining edge 2032 is provided on the inner wall of the rear end of the first input shaft seat 203, and another input shaft bearing 202 is axially limited between the transition surface and the retaining edge. Therefore, in this embodiment, the input shaft 201 is supported in two input shaft bearings 202, the axes of the two input shaft bearings 202 coincide and determine the axis of the input shaft 201, and the input shaft seat 203 is a bearing seat. However, the present invention is not limited to this, and a sleeve can also be placed in the input shaft seat 203 to support the input shaft 201. The axis of the input shaft 201 is perpendicular to the opening and closing direction of the nail magazine 101 and the nail anvil 103, and is parallel to the extension direction of the nail magazine support 102 and the nail anvil support 104, that is, parallel to the front-back direction.

[0052] A strip-shaped slide groove 2015 is provided on the third input shaft segment 2013, the length direction of which is parallel to the axial direction of the input shaft 201, and the strip-shaped slide groove 2015 runs through the radial direction of the third input shaft segment 2013. Meanwhile, two strip-shaped grooves 2016 are provided on the opposite side walls of the third input shaft segment 2013, i.e., the two strip-shaped grooves 2016 are symmetrically located on both sides of the strip-shaped slide groove 2015, and the length direction of the strip-shaped groove 2016 is along the axial direction of the input shaft 201. The length of the strip-shaped groove 2016 is shorter than that of the strip-shaped slide groove 2015, and the proximal end of the strip-shaped slide groove 2016 is located at the distal side of the proximal end of the strip-shaped slide groove 2015, and the distal end of the strip-shaped groove 2016 is located at the proximal side of the distal end of the strip-shaped slide groove 2015.

[0053] The switching slider 211 is in a plate shape and is inserted into the strip-shaped slide groove 2015 . A strip hole 2111 is provided on the switching slider 211, and the length direction of the strip hole 2111 is along the radial direction of the input shaft 201, that is, the length direction of the strip hole 2111 is perpendicular to the length direction of the above-mentioned strip groove 2016, a rod body 215 passes through the strip hole 2111 and the two ends of the rod body 215 pass through the above-mentioned two strip grooves 2016, at least one of the radial ends of the switching slider 211 protrudes to the outside of the strip groove 2015, that is, when the switching slider 211 rotates to the vertical orientation and stops without the action of external force, the switching slider 211 is hung on the rod body 215 due to gravity, and the lower end of the switching slider 211 protrudes from the strip groove 2015 at this time. Of course, in this embodiment, the radial ends of the switching slider 211 both protrude to the outside of the strip groove 2015 to ensure smooth driving connection. Thus, the switching slider 211 is inserted into the strip slide groove 2015, and the switching slider 211 can move bidirectionally along the strip slide groove 2015 in the axial direction of the input shaft 201, and can move bidirectionally in the radial direction of the input shaft 201. At the same time, if the input shaft 201 rotates, the switching slider 211 will be driven to rotate. The proximal end of the switching slider 211 is gradually reduced to form two upper and lower inclined surfaces. In this embodiment, the strip slide groove 2015 is located at the rear of the input shaft.

[0054] The output shaft seat 209 is arranged at the rear side of the input shaft bearing 202 seat. The output shaft seat 209 is a rectangular parallelepiped, and the length direction is along the axial direction. Of course, it can also be a cube. The two side walls of the output shaft seat 209 are respectively provided with a plurality of fixing holes arranged along the axial direction. In this embodiment, there are four fixing holes arranged in a rectangular shape. A plurality of output shaft seat fixing holes 4018 are provided on the side plate 4012. The output shaft seat 209 is positioned and fixed on the side plate 4012 by passing the fixing pins through the fixing holes on the output shaft seat 209 and the side plate 4012. Specifically, in this embodiment, the output shaft seat 209 is not directly positioned and fixed on the side plate 4012, but through the nail anvil bracket. Specifically, four rectangular fixing holes are respectively provided on the left and right side walls of the nail anvil bracket, and the four fixing holes are connected to the four fixing holes on the same side of the output shaft seat 209 through fixing pins. At the same time, a row of two output shaft seat fixing holes 4018 are arranged in the axial direction on the side plate, and the two output shaft seat fixing holes 4018 are aligned with the two fixing holes located in the lower row of the output shaft seat 209 and the anvil bracket, and the fixing pins passing through the two fixing holes pass through the two output shaft seat fixing holes 4018 at the same time. Thus, the output shaft seat 209 is positioned and fixed inside the anvil bracket, and the anvil bracket is positioned and fixed on the inner side of the side plate 401, and the three are connected by a common fixing pin, and the main support simultaneously positions and fixes the anvil bracket and the output bearing seat 209. The inner wall of the side plate 4012 is a plane, which abuts against the anvil bracket. Thus, it is helpful to reduce the axial dimension.

[0055] Of course, the present invention is not limited to this, and the output shaft seat and the anvil bracket can be independently fixed to the side plate, and in this case, the plane of the inner wall of the side plate 4012 abuts against the side wall of the output shaft seat 209.

[0056] The output shaft bearing 208 is supported in the output shaft seat 209, and the output shaft 207 is supported in the output shaft bearing 208, thereby forming a rotatable arrangement. Of course, in other embodiments, the output shaft bearing 208 can also be changed to a sleeve. At the same time, the output shaft 207 is arranged at the rear side of the input shaft 201, and is coaxially arranged with the input shaft 201, but is axially spaced from the input shaft 201, that is, it does not dock with the input shaft 201. The output shaft 207 includes a first output shaft segment 2071, a second output shaft segment 2072, and a third output shaft segment 2073, which are sequentially connected and coaxial from near to far. The diameter of the first output shaft segment 2071 is smaller than the diameter of the second output shaft segment 2072, and the diameter of the second output shaft segment 2072 is smaller than the diameter of the third output shaft segment 2073.

[0057] A radially penetrating groove 2075 is provided on the first output shaft segment 2071, that is, the proximal part of the output shaft 207, and a transmission slider 212 is inserted in the groove 2075. A strip hole 2121 is provided on the transmission slider 212, and the length direction of the strip hole 2121 is along the radial direction of the output shaft 207. Support holes 2074 are provided on both sides of the output shaft 207 symmetrically along the groove 2075. A rod 216 passes through the strip hole 2121, and both ends of the rod 216 are supported on two support holes 2074. Thus, the transmission slider 212 can be supported in the slide groove 2075 in a bidirectional manner along the radial direction of the output shaft 207, and at least one of the two radial ends of the transmission slider 212 protrudes to the outside of the slide groove 2075, that is, when the transmission slider 212 rotates to the vertical orientation and stops without the action of external force, the upper end surface of the strip hole 2121 of the transmission slider 212 is hung on the rod 216 due to gravity, and the lower end of the transmission slider 212 protrudes from the slide groove 2075. Of course, in this embodiment, both radial ends of the transmission slider 212 protrude to the outside of the slide groove 2075 to ensure smooth driving connection. The proximal end of the transmission slider 212 is gradually reduced to form two inclined surfaces.

[0058] A transition surface is formed between the first output shaft segment 2071 and the second output shaft segment 2072. The position of the transition surface corresponds to the distal end of the output shaft seat 209, and a step surface 2076 is formed on the inner wall of the output shaft seat 209 corresponding to the position of the transition surface. The distal end surface of the output shaft bearing 208 abuts against the transition surface and the step surface 2076, and the output shaft bearing 208 and the output shaft seat 209 have an interference fit.

[0059] The transition surface formed between the second output shaft segment 2072 and the third output shaft segment 2073 is located outside the output shaft seat 209. The rear end of the third output shaft segment 2073 has an axial plug hole 2077, and the axial plug hole 2077 and the proximal end of the firing screw 105 form a plug connection that can drive two-way rotation. In this embodiment, the axial plug hole 2077 is a D-shaped hole, and the proximal end of the firing screw 105 is a D-shaped column. Of course, in other embodiments, the axial plug hole 2077 can also be set as a non-circular hole, and the proximal end of the firing screw 105 can be set as a non-circular column. The axis of the output shaft coincides with the axis of the firing screw 105.

[0060] The upper wall of the output shaft seat 209 is connected to the proximal end of the anvil 103 through a fixing pin, and the lower wall of the output shaft seat 209 is connected to the proximal end of the anvil bracket 104 through a fixing pin.

[0061] The output sleeve seat 206 is a rectangular parallelepiped, and the length direction is perpendicular to the axial direction. In other embodiments, it can also be a cube. On the part below the boss 4014 in the vertical plate 4011 in the side plate 401, behind the input shaft fixing hole, a plurality of output sleeve seat fixing holes 4017 are arranged in a direction perpendicular to the axial direction, and a plurality of fixing holes perpendicular to the axial direction are respectively arranged on the two side walls of the output sleeve seat 206. A fixing pin passes through the fixing hole and the output sleeve seat fixing hole 4017 to position and fix the output sleeve seat 206 to the vertical plate 4011.

[0062] The axis of the output sleeve 204 coincides with the axis of the input shaft 201, and the output sleeve 204 is sleeved on the outside of the input shaft 201 in a bidirectionally rotatable manner but does not directly contact the input shaft 201. A sleeve is provided in the output sleeve seat 206, and the output sleeve 204 is supported in the sleeve. Of course, a bearing may also be used in other embodiments. Thus, the output sleeve 204 is arranged to be rotatable in both directions. In this embodiment, the output sleeve seat 206 is located on the far side of the input shaft seat 203 and on the near side of the output shaft seat 209.

[0063] The first bevel gear 301 is fixedly sleeved on the outside of the output sleeve 204, the first bevel gear 301 is meshed with the second bevel gear 302, and the closing screw 303 is fixedly connected with the second bevel gear 302. Therefore, the axis of the output sleeve 204 is perpendicular to the axis of the closing screw 303. Therefore, in this embodiment, the first bevel gear 301 is always meshed with the second bevel gear 302, avoiding the problem of large force on the first bevel gear 301 during the process of disengagement and meshing with the second bevel gear 302.

[0064] The top end of the closing screw 303 is bidirectionally rotatably connected to the mounting hole in the connecting plate 402 through a bearing 305, and the bottom end is bidirectionally rotatably supported on the top wall of the input shaft seat 203 through a bearing. The axis of the closing screw 303 is perpendicular to the axis of the input shaft.

[0065] The closing nut 304 is screwed on the closing screw 303, and the nail magazine bracket 102 has a mounting hole 1021, and the mounting hole 1021 is tightly sleeved on the closing nut 304, so that the closing nut 304 is fixedly connected to the nail magazine bracket 102. Thus, the output sleeve 204 is connected to the nail magazine bracket 102 in a manner that its bidirectional rotation is converted into the up and down movement of the nail magazine bracket 102, and the output shaft 207 is connected to the firing screw 105 in a manner that the bidirectional rotation of the output sleeve 204 is converted into the bidirectional rotation of the firing screw 105. Of course, in other embodiments, according to the enlightenment given by this embodiment, the output sleeve 204 can be connected to the nail magazine bracket 102 in a manner that its bidirectional rotation is converted into the up and down movement of the nail magazine bracket 102, and the output shaft 207 is connected to the firing screw 105 in a manner that the bidirectional rotation of the output sleeve 204 is converted into the bidirectional rotation of the firing screw 105.

[0066] Three driving blocks 2041 are provided on the rear end hole wall of the output sleeve 204, wherein any two driving blocks 2041 are staggered relative to the diameter, and the rear end inner wall of the driving block 2041 is tilted backward and outward to form an inclined surface, and the inclined surface of the driving block 2041 has the same inclination as the inclined surface on the switching slider 211, which is conducive to the push between the two (described in detail later). In other embodiments, the number of driving blocks 2041 is not limited to three, and can also be two or more than three. When two driving blocks 2041 are provided, the idling stroke will be larger. Considering various parameters such as idling stroke and product size, three driving blocks 2041 are a better choice. The driving block 2041 and the output sleeve 204 are an integrally formed part or connected in a fixed connection manner, so that the driving block 2041 and the output sleeve 204 do not move relative to each other during operation.

[0067] In this embodiment, whether in the first position or the second position (these two positions will be described in detail later), the switching sleeve 210 is always sleeved on the outside of the input shaft 201 and the output shaft 207, and is located on the rear side of the output sleeve 204, and the axis of the switching sleeve 210 coincides with the axis of the input shaft 201. Of course, in other embodiments, the switching sleeve 210 may be located only on the outside of the input shaft 201 when it is in the first position, and then be located on the outside of the input shaft 201 and the output shaft 207 when it moves to the second position. However, the structure of this embodiment is conducive to shortening the axial dimension, making the structure more compact. At the same time, the switching sleeve 210 can also be on the other side of the axial direction of the output sleeve, and other structures adjust their positions accordingly.

[0068] Two supporting holes are provided on the proximal opposite side walls of the switching sleeve 210 (i.e., the two sides opposite to the strip-shaped slide groove 2015), and the two ends of the rod body for supporting the switching slider 211 pass through the two supporting holes respectively, thereby, the switching sleeve 210 and the switching slider 211 form a driving connection for simultaneous bidirectional axial movement and bidirectional rotation. At the same time, the rod member passes through the strip groove 2016 on the input shaft 201 and the supporting holes on the switching sleeve 210 at the same time, and also connects the switching sleeve 210 with the input shaft 201, so that the input shaft 201 and the switching sleeve 210 can be driven to rotate in both directions and the switching sleeve 210 can move in both directions along the input shaft 201 between the first position and the second position (the first position is located in front of the second position, i.e., the proximal side), and at the same time, the switching slider 211 is connected with the switching sleeve 210 in a manner of bidirectional axial movement and bidirectional rotation around the axis of the input shaft 201. Generally speaking, the proximal end surface of the strip groove 2016 of the input shaft 201 defines the first position, and the rear end surface of the strip groove 2016 of the input shaft 201 defines the second position. The switching sleeve 210 is also provided with slots 2101 corresponding to the radial ends of the switching slider 211 to make way for the movement of the switching slider 211.

[0069] The inner wall at the rear end of the switching sleeve 210 is provided with three circumferentially spaced blocks 2102, and any two blocks 2102 are staggered along the diameter. The inner wall at the rear end of the block 2102 is tilted backward and outward to form an inclined plane, and the inclination of the inclined plane is the same as the inclination of the inclined plane on the transmission slider 212, which is conducive to the push between the two (described in detail later). In other embodiments, the number of blocks 2102 is not limited to three, and can also be two or more than three. When two blocks 2102 are provided, the idling stroke will be larger. Considering various parameters such as idling stroke and product size, three blocks 2102 are a better choice. The block 2102 and the switching sleeve 210 are an integrally formed part or connected in a fixed connection manner, so that the block 2102 and the switching sleeve 210 do not move relative to each other during operation.

[0070] The switching drive member 213 includes a toggle member 2132 and an engaging piece 2131 connected to each other. In this embodiment, the toggle member 2132 is a rod, the inner end of which is connected to the engaging piece 2131, and the outer end is a free end for the operator to toggle. On the outer wall of the switching sleeve 210, located at the rear side of the slot 2101, an annular groove or annular protrusion 2103 is provided. The engaging piece 2131 has a groove end that matches the shape of the annular groove or annular protrusion 2103, and the groove end is plugged with the annular groove or annular protrusion 2103 to rotate relatively. Correspondingly, a slide 4020 is provided on the vertical plate 4011 of a side plate 401 of the main support 4, and the outer end of the toggle member 2132 extends from the slide 4020 to the outer side of the main support 4. In this embodiment, the slide 4020 is a linear slide 4020 extending along the axial direction of the input shaft 201.

[0071] like Figure 4 As shown, when the switching sleeve 210 is located in the first position:

[0072] The switching slider 211 corresponds to the driving block 2041 circumferentially. At this time, the switching slider 211 may be in circumferential contact with the driving block 2041, or there may be a circumferential gap between them. However, once the switching slider 211 rotates a certain angle with the input shaft 201, it will form a circumferential contact with the driving block 2041, and finally the switching slider 211 pushes the driving block 2041 to move, thereby forming a connection between the switching sleeve 210 and the output sleeve 204 in a manner of driving bidirectional rotation.

[0073] At the same time, the stopper 2102 on the switching sleeve 210 is located in front of the transmission slider 212, that is, the stopper 2102 and the transmission slider 212 are staggered, so that the switching sleeve 210 is separated from the output shaft 207, and the rotation of the switching sleeve 210 will not drive the output shaft 207 to rotate.

[0074] When the switching sleeve 210 moves backward (i.e., toward the far side) from the first position, it drives the switching slider 211 to move backward together. When the switching slider 211 moves backward, it slides along the strip groove 2015 on the input shaft 201, and the rod body on the switching slider 211 slides along the strip groove 2016 on the input shaft 201. At this time, the switching slider 211 still maintains a driving rotation connection with the input shaft 201.

[0075] like Figure 5 As shown, when the switching sleeve 210 is located in the second position:

[0076] The switching slider 211 is located at the rear side of the driving block 2041, that is, the switching slider 211 and the driving block 2041 are staggered, and the switching sleeve 210 is separated from the output sleeve 204, that is, the driving connection between the two is released, and the rotation of the switching sleeve 210 will not drive the output sleeve 204 to rotate.

[0077] The stopper 2102 on the switching sleeve 210 corresponds to the transmission slider 212 in the circumferential direction. At this time, the transmission slider 212 may be in circumferential contact with the stopper 2102, or may be in circumferential contact with the transmission slider 212 with a spacing therebetween. However, once the stopper 2102 rotates a certain angle along with the switching sleeve 210, it will form circumferential contact with the transmission slider 212, and finally the stopper 2102 will push the transmission slider 212 to move, thereby forming a connection between the switching sleeve 210 and the output sleeve 204 in a manner of driving bidirectional rotation.

[0078] Such an arrangement achieves the double-edged effect of achieving a bidirectionally movable driving connection between the input shaft and the switching sleeve and a selective driving connection between the switching sleeve and the output sleeve through a simple structure.

[0079] In actual application, the switching drive 213 controls the switching of the switching sleeve 210 between the first position and the second position along the axial direction of the input shaft 201. On the outer wall of the switching sleeve 210, an annular protrusion 2103 or an annular groove is provided at the rear side of the above-mentioned slot 2101. The switching drive 213 includes a connected toggle member 2132 and an engaging piece 2131. The engaging piece 2131 has a groove end matching the shape of the annular protrusion 2103 or the annular groove. The groove end and the annular protrusion 2103 can be plugged in a relatively bidirectional rotation. The toggle member 2132 extends out of the main support 4 of the linear cutting stapler for the operator to toggle. The toggle member 2132 is a rod.

[0080] In summary, in this embodiment, the top ends of the input shaft 201, the output shaft 207 and the closing screw 303 are all positioned and fixed on the main support 4, and the bottom end of the closing screw 303 is positioned and fixed through the input shaft seat 203, so that the positioning and installation of these three rotating parts are more convenient and accurate, and more stable during use. Further, the two side plates 401 are separated on both sides of the transmission parts such as the input shaft 201, the output shaft 207, the output sleeve 204, the switching sleeve 210, the first bevel gear 301, the second bevel gear 302, the closing screw 303, and the closing nut 304, so as to fix and protect these transmission parts.

[0081] In this embodiment, the parallel closing device includes two groups of connecting rod mechanisms 107 located on the left and right sides of the nail magazine support 102, and each group of connecting rod mechanisms 107 includes a first connecting rod 1071 and a second connecting rod 1072 that are hinged to each other. The length of the first connecting rod 1071 and the second connecting rod 1072 are equal, and the hinge of the two is located at the center of their lengths, that is, the hinge position of the two divides the two connecting rods into two isosceles triangles. A first bending frame 110 and a second bending frame 111 are fixed to the upper wall of the nail magazine support 102. The first bending frame 110 and the nail magazine support 102 are combined to form a long groove that runs through the left and right, and the second bending frame 111 and the nail magazine support 102 are combined to form a through hole that runs through the left and right. The nail anvil support 104 has two symmetrical long fixing ears 1041 on the left and right and two symmetrical short fixing ears 1042 on the left and right.

[0082] A fixing ear 4019 is provided at the distal end of the side plate 4012 in the side plate 401, and a through hole is provided on the fixing ear 4019. The connecting pin in the short fixing ear 1042 passes through the through hole on the side plate 4012, thereby, the connecting pin also plays a role in positioning and fixing the anvil bracket 104 and the main support seat.

[0083] The top ends of the first links 1071 in the two sets of link mechanisms 107 are hinged to the same connecting pin passing through the long slot on the magazine support 102 (i.e., the long slot formed by the first bending frame 110 and the magazine support 102), and the bottom ends of the first links 1071 in the two sets of link mechanisms 107 are respectively hinged to the anvil support 104 through connecting pins passing through the round holes 1044 of the two short fixing ears 1042. The top ends of the second links 1072 in the two sets of link mechanisms 107 are hinged to the same connecting pin passing through the through hole on the magazine support 102 (i.e., the through hole formed by the second bending frame 111 and the magazine support 102), and the bottom ends of the second links 1072 in the two sets of link mechanisms 107 are hinged to the same connecting pin passing through the long slot 1043 of the two long fixing ears 1041. Through the above structure, the top end of the first connecting rod 1071 can rotate and slide along the nail magazine bracket 102, and the bottom end of the second connecting rod 1072 can rotate and slide along the nail anvil bracket 104. In this way, the nail magazine bracket 102 can be prevented from tilting or horizontally staggered relative to the nail anvil bracket 104 during the up and down movement, that is, the nail magazine bracket 102 and the nail anvil bracket 104 are ensured to be parallel when opening and closing, and at the same time, the pressure at the connection between the nail magazine bracket 102 and the closing nut 304 is relieved, so that the setting of the transmission device 2 can be made into a more optimized and simplified design without considering the pressure here.

[0084] The long fixing ear 1041 is provided with a long groove 1043, and the short fixing ear 1042 is provided with a round hole 1044. The long fixing ear 1041 is located at the proximal side of the positioning seat, and is arranged corresponding to the position of the second bearing seat and the slider in the axial direction. The connecting pin in the long fixing ear 1041 is located above the second bearing seat, that is, above the output shaft 207. The short fixing ear 1042 is located at the distal side of the positioning seat, and the connecting pin in the short fixing ear 1042 is located above the anvil 103 on the anvil bracket 104.

[0085] Of course, in other embodiments, the positions of the long fixing ears 1041 and the short fixing ears 1042 are exchanged, and connecting pins are respectively provided in the two long fixing ears to connect with the two first connecting rods respectively, while only one connecting pin is passed through the two short fixing ears 1042 to connect with the two second connecting rods at the same time, and at the same time, the positions of the first bending frame 110 and the second bending frame 111 are also interchanged. Thus, one end of the first connecting rod 1071 in the two groups of connecting rod mechanisms is rotatably and slidably connected to the nail anvil support 104 through two connecting pins, and the other end of the first connecting rod 1071 in the two groups of connecting rod mechanisms 107 is hinged to the nail magazine support 102 through the same connecting pin; one end of the second connecting rod 1072 in the two groups of connecting rod mechanisms 107 is rotatably and slidably connected to the nail magazine support 102 through the same connecting pin, and the other end of the second connecting rod 1072 in the two groups of connecting rod mechanisms 107 is hinged to the nail anvil support 104 through the same connecting pin.

[0086] Among them, the "long" and "short" in the above-mentioned long fixing ears and short fixing ears are a set of relative concepts, which only indicate the length relationship between the two and there is no specific size limitation.

[0087] In summary, the linear cutting stapler of this embodiment can perform the following actions:

[0088] first step:

[0089] When the toggle member 2132 is located at the front limit position (this front limit position can be limited by the slideway 4020 on the linear cutting stapler main support 4, or by the strip groove 2016 or the strip slide groove 2015 associated with the switching slider 211), the switching sleeve 210 is located at the first position. At this time, the switching slider 211 corresponds to the driving block 2041 on the output sleeve 204 in circumferential direction, and the switching sleeve 210 and the output sleeve 204 are in a connected state of driven rotation. At the same time, the block 2102 of the switching sleeve 210 is located in front of the transmission slider 212, and the switching sleeve 210 is separated from the output shaft 207. In this state, the motor is started, and the rotation of the input shaft 201 drives the switching sleeve 210 and the switching slider 211 to rotate through the rod body, and the switching slider 211 pushes the output sleeve 204 to rotate, and then drives the nail magazine bracket 102 to move downward through the transmission mechanism, and the connecting rod mechanism 107 between the nail magazine bracket 102 and the nail anvil bracket 104 is closed, and the nail magazine bracket 102 and the nail anvil bracket 104 are closed in parallel. At the same time, the switching sleeve 210 is separated from the output shaft 207, the output shaft 207 does not rotate, and the firing screw 105 does not rotate.

[0090] Step 2:

[0091] Stop the operation of the motor, and the operator drives the toggle member 2132 toward the rear side to the rear limit position (the rear limit position can be limited by the slide 4020 on the main support 4 of the linear cutting stapler, or by the strip groove 2016 or the strip slide groove 2015 associated with the switching slider 211), driving the switching sleeve 210 to move toward the second position, and the switching slider 211 moves with the switching sleeve 210 and gradually disengages from the driving block 2041. The stop block 2102 on the switching sleeve 210 gradually moves to correspond to the circumference of the transmission slider 212, and the switching sleeve 210 forms a driving connection with the output shaft 207.

[0092] Step 3:

[0093] Start the motor, the rotation of the input shaft 201 drives the rod body on the switching slider 211 to rotate, and then drives the switching slider 211 and the switching sleeve 210 to rotate. The block 2102 on the switching sleeve 210 pushes the transmission slider 212 on the output shaft 207 to drive the output shaft 207 to rotate. The output shaft 207 drives the firing screw 105 to rotate, and the firing nut 106 moves axially backward to fire.

[0094] Step 4:

[0095] When the firing is required to be released, the driving motor rotates in the reverse direction (opposite to the direction in the third step), the input shaft 201 rotates in the reverse direction (opposite to the direction in the third step), the switching sleeve 210 rotates in the reverse direction (opposite to the direction in the third step), the output shaft 207 rotates in the reverse direction (opposite to the direction in the third step), the firing screw 105 rotates in the reverse direction (opposite to the direction in the third step), and the firing nut 106 moves forward to return to its original position.

[0096] Step 5:

[0097] The motor is stopped, and the operator drives the toggle member 2132 to move forward to the limit position, the switching sleeve 210 returns to the first position, the switching slider 211 and the driving block 2041 form a circumferential correspondence, and the stopper 2102 is disengaged from the transmission slider 212.

[0098] Then the driving motor rotates in the opposite direction, the input shaft 201 rotates in the opposite direction (opposite to the direction in the first step), the switching sleeve 210 rotates in the opposite direction (opposite to the direction in the first step), and the output sleeve 204 rotates in the opposite direction (opposite to the direction in the first step), and then the closing nut 304 is driven to move upward through the closing screw, the connecting rod mechanism 107 between the nail magazine bracket 102 and the nail anvil bracket 104 opens, the nail magazine bracket 102 moves upward, the nail magazine bracket 102 and the nail anvil bracket 104 open in parallel, and return to the open state.

[0099] In summary, the linear cutting stapler of the present embodiment utilizes a parallel closing device directly connected to the staple magazine support 102 and the staple anvil support 104 to ensure the parallel and stable opening and closing of the staple magazine support 102 and the staple anvil support 104. In particular, the mechanism for realizing switching does not need to take into account the requirement of closing stability, and is simplified to form an axially movable selective driving connection between the output sleeve 204 and the output shaft 207 and the switching sleeve 210, so that the rotation of the input shaft 201 can be selectively provided to the output sleeve 204 and the output shaft 207. The structure is simple, compact, low-cost, and suitable for mass production.

[0100] Furthermore, the input shaft 201, the output shaft 207, the output sleeve 204 and the switching sleeve 210 are arranged along an axis and the axial movement of the switching sleeve 210 realizes the selective driving connection with the output sleeve 204 and the output shaft 207, so that the rotation of the input shaft 201 can be selectively provided to the output sleeve 204 and the output shaft 207, and the structure is more compact and simple. At the same time, the linear cutting stapler occupies a smaller radial area, which is convenient for its grasping and use.

[0101] Furthermore, the output shaft 207 is directly connected to the firing screw coaxially, which also makes the radial area of ​​the linear cutting stapler smaller and makes the axial structure more compact.

[0102] Furthermore, the purpose of setting the above-mentioned switching slider 211 / transmission slider 212 and the driving block 2041 / stop block 2102 is that the switching sleeve 210 stops at a different angle each time after rotating in the first position. If only one driving block 2041 / stop block 2102 is set, the stopping position of the driving block 2041 / stop block 2102 may be directly opposite to the switching slider 211 / transmission slider 212. In this way, the switching slider 211 / transmission slider 212 and the driving block 2041 / stop block 2102 will axially abut during the switching process, thereby preventing the switching sleeve 210 from forming a driving connection with the output sleeve 204 and the output shaft 207. The multiple drive blocks 2041 / blocks 2102 arranged with staggered diameters, combined with the switching slider 211 / transmission slider 212, can move radially in both directions. When the switching slider 211 / transmission slider 212 is opposite to one of the drive blocks 2041 / blocks 2102, as the switching sleeve 210 moves axially, the switching slider 211 / transmission slider 212 will be pushed radially inward by the drive block 2041 / block 2102 opposite to it (the inclined surfaces on the drive block 2041 / block 2102 and the switching slider 211 / transmission slider 212 are conducive to this pushing) so as not to hinder the switching sleeve 210 from forming a driving connection with the output sleeve 204 and the output shaft 207. The other end of the switching slider 211 / transmission slider 212 will protrude more and better correspond circumferentially to the drive block 2041 / block 2102 on the other side. Since the three driving blocks 2041 / blocks 2102 are evenly arranged and the switching slider 211 / transmission slider 212 has only two ends, there may be a certain distance between the switching slider 211 / transmission slider 212 and the driving blocks 2041 / blocks 2102 corresponding to the switching slider 211 / transmission slider 212. When the switching sleeve 210 rotates again, it will idle for a certain distance. When the driving blocks 2041 / blocks 2102 rotate to the switching slider 211 / transmission slider 212, the output sleeve 204 / output shaft 207 is pushed to rotate. This idle distance will only cause the closing time / firing staple discharge time to be slightly earlier or later, but will not affect the suturing effect. Therefore, this design can ensure the smooth switching between the closed state and the firing state. Of course, in other embodiments, the positions of the transmission slider and the block can be interchanged, the proximal end of the output shaft is set as a sleeve and the inner wall thereof is provided with a block, a shaft is set at the distal end of the switching sleeve and the transmission slider is fixed in a groove on the shaft so as to be bidirectionally radially movable, the above purpose can also be achieved, but this design requires the switching sleeve to form a shaft to reduce the overall radial size, and the component structure is more complicated. In addition, in other embodiments, setting a drive block / block can also basically achieve the above purpose, but in some cases, the drive slider / transmission slider needs to idle for almost one circle to achieve the drive connection, which is not as stable as the structure in this embodiment.

[0103] Furthermore, the parallel closing device in this embodiment adopts a connecting rod mechanism 107, which has the advantages of simple structure and good effect. The position where the first connecting rod 1071 is connected to the nail anvil bracket 104 is located at the far side of the position where the second connecting rod 1072 is connected to the nail anvil bracket 104, and the two first connecting rods 1071 are separately connected to the nail anvil bracket 104 through independent connecting pins, which can make way for the movement of the firing nut and make the overall structure of the stapler more compact.

[0104] Among them, the output sleeve 204, the output sleeve seat 206, the switching sleeve 210, the switching drive 213, the switching slider 211, the transmission slider 212, the first bevel gear 301 and the second bevel gear 302 are the main components of the transmission mechanism, which are used to connect to the input shaft 201, the closing screw 303 and the output shaft 207, and can selectively convert the bidirectional rotation of the input shaft 201 into the bidirectional rotation of the closing screw 303 and the output shaft 207.

[0105] Example 2

[0106] See also Figure 7 and Figure 8 , compared with Example 1, the difference lies in the shape of the slideway 4020.

[0107] In this embodiment, the slide 4020 includes a first slide section 40201, a second slide section 40202 and a third slide section 40203 which are connected end to end. The first slide section 40201 and the third slide section 40203 extend along the axial direction of the input shaft 201, the second slide section 40202 is perpendicular to the first slide section 40201 and the second slide section 40202, and the tail of the third slide section 40203 faces the head side of the first slide section 40201. In this way, the head of the first slide section 40201 is located on the proximal side and the tail is located on the distal side; the head of the third slide section 40203 is located on the distal side and the tail is located on the proximal side, so that the tail of the third slide section 40203 faces the head side of the first slide section 40201. The position and length of the first slideway section 40201 are configured such that the switching drive member 213 can drive the switching sleeve 210 to move between the first position and the second position when sliding on the first slideway section 40201, and the position and length of the third slideway section 40203 are configured such that when the switching drive member 213 stays at the tail of the second slideway section 40202, the switching sleeve 210 remains connected to the output shaft 207 in a driving rotation manner. At this time, the length of the circumferential push between the stopper 2102 of the switching sleeve 210 and the transmission slider 212 on the output shaft 207 is less than the length of the circumferential push formed by the switching sleeve 210 when the switching sleeve 210 is in the second position, but it can still ensure that the circumferential push that can meet the drive connection requirements is achieved.

[0108] Such a configuration is equivalent to locking the position of the switching sleeve 210, ensuring that the switching sleeve 210 is continuously located in a position for driving connection with the output shaft 207, and at the same time, the operator does not need to push the toggle member 2132 all the time to ensure the stability of the driving connection.

[0109] In addition to being applicable to the structure of embodiment 1, this setting is also applicable to the case where an elastic member is sleeved on the output shaft 207 and the elastic member abuts between the output shaft 207 and the switching sleeve 210. In this case, when the switching sleeve 210 moves from the first position to the second position, the elastic member is compressed. If the switching sleeve 210 needs to return from the second position to the first position, the operator directly lets go and drives the switching sleeve 210 to reset through the stored force of the elastic member. At this time, by using the slideway 4020 of this embodiment that can lock the switching sleeve 210, the operator does not need to continuously push the toggle member 2132 while the switching sleeve 210 forms a driving connection with the output shaft 207. In other embodiments, the third slideway section 40203 can also be removed, and the second slideway section 40202 can also achieve a locking function to a certain extent.

[0110] Of course, the elastic member may also be connected between the switching sleeve 210 and the output sleeve 204 , or between the switching sleeve 210 and the input shaft 201 , to store force by stretching.

[0111] Example 3

[0112] See also Fig. 9 and Fig.10 Compared with Example 1, the main difference of this embodiment lies in the connection method of the switching sleeve 210 with the input shaft 201, the output sleeve 204 and the output shaft 207.

[0113] Specifically, the proximal portion of the switching sleeve 210 is disposed between the input shaft 201 and the output sleeve 204 , and can move along the axis of the input shaft 201 and the output sleeve 204 .

[0114] The switching sleeve 210 is provided with a plurality of first mounting holes 2104 evenly spaced in the circumferential direction, and a first arch spring buckle 2105 (as a first engaging member) is elastically fixed in each first mounting hole 2104. The first arch spring buckle 2105 protrudes from the outer peripheral wall of the switching sleeve 210 in a natural state, and moves toward the first mounting hole 2104 when pressed down. Correspondingly, a plurality of first arch engaging grooves 2042 (as a second engaging member) are provided on the inner wall of the output sleeve 204 in the circumferential direction, and the number of the first arch engaging grooves 2042 is equal to the first mounting holes 2104, or is a multiple of the number of the first mounting holes 2104. When the switching sleeve 210 is located at the first position, the axial position of the first arch spring buckle 2105 corresponds to the axial position of the first arch engagement groove 2042. The first arch spring buckle 2105 may have been engaged with the first arch engagement groove 2042, or the first arch spring buckle 2105 may be pressed against the inner wall of the output sleeve 204 and have a certain distance from the first arch engagement groove 2042 in the circumferential direction. However, when the switching sleeve 210 rotates a certain angle, the first arch spring buckle 2105 naturally springs into the first arch engagement groove 2042. Therefore, the above two situations both belong to the switching sleeve 210 and the output sleeve 204 forming a driving connection. When the switching sleeve 210 is located at the second position, the first arch spring buckle 2105 is located at the rear side of the first arch engagement groove 2042, and the two are axially separated and do not form a driving connection.

[0115] The switching sleeve 210 is provided with at least two groups of second mounting holes 2106 arranged at intervals along the axial direction, and each group of second mounting holes 2106 includes a plurality of second mounting holes 2106 evenly spaced along the circumferential direction. A second arch spring buckle 2107 (as a third coupling member) is elastically fixed in each second mounting hole 2106. The second arch spring buckle 2107 protrudes from the inner circumferential wall of the switching sleeve 210 in a natural state, and moves toward the second mounting hole 2106 when pressed downward. Correspondingly, at least two groups of second arched engagement grooves 2018 (as fourth engagement members) arranged at intervals along the axial direction are provided on the outer wall of the input shaft 201, and each group of second arched engagement grooves 2018 includes a plurality of second arched engagement grooves 2018 evenly spaced along the circumferential direction, and the number of second arched engagement grooves 2018 in each group is equal to the number of second mounting holes 2106 in each group, or is a multiple of the number of second mounting holes 2106 in each group, and the number of groups of second arched engagement grooves 2018 is the same as the number of groups of second mounting holes 2106. When the switching sleeve 210 is in the first position, the axial positions of the multiple groups of second arch spring buckles 2107 correspond one by one to the axial positions of the multiple groups of second arch engaging grooves 2018. The second arch spring buckles 2107 may have been engaged with the second arch engaging grooves 2018, or the second arch spring buckles 2107 may be pressed against the outer wall of the input shaft 201 and have a certain distance from the second arch engaging grooves 2018 in the circumferential direction. However, when the input shaft 201 rotates a certain angle, the second arch spring buckles 2107 naturally spring into the second arch engaging grooves 2018. Therefore, the above two situations both belong to the switching sleeve 210 and the input shaft 201 forming a driving connection.

[0116] A plurality of third arched engagement grooves 2078 (as a fifth engagement member) are arranged evenly spaced in the circumferential direction on the outer wall of the output shaft 207, and the number of the third arched engagement grooves 2078 is equal to the number of the second mounting holes 2106 in each group, or is a multiple of the number of the second mounting holes 2106 in each group. When the switching sleeve 210 is located at the first position, the third arched engagement groove 2078 is located at the rear side of the second arched snap 2107 of the switching sleeve 210, and the third arched engagement groove 2078 is axially separated from the second arched snap 2107. When the switching sleeve 210 is in the second position, the rearmost group of second arched snaps 2107 on the switching sleeve 210 engage with the third arched engagement groove 2078, or the third arched snaps press against the outer wall of the output shaft 207 and are at a certain distance from the third arched engagement groove 2078 in the circumferential direction. However, when the switching sleeve 210 rotates a certain angle, the rearmost group of second arched snaps 2107 naturally spring into the third arched engagement groove 2078. Therefore, the above two situations both belong to the switching sleeve 210 and the output shaft 207 forming a driving connection. At this time, the frontmost group of second arched snaps 2107 on the switching sleeve 210 engage with the front second group of second arched engagement grooves 2018 on the input shaft 201, and the front first group of second arched engagement grooves 2018 on the input shaft 201 are vacant.

[0117] In order to achieve a stable driving connection and axial bidirectional movement at the same time, the length direction of the rectangular flat surface of the arched snap is parallel to the axial direction of the component (the switching sleeve 210 in this embodiment), and the diameter direction of the arched engagement groove is parallel to the axial direction of the component (the input shaft, output shaft and output sleeve in this embodiment), so that the arched surface of the arched snap is convenient for the arched snap to be disengaged from the engaged arched engagement groove when the switching sleeve 210 has an axial external force. The two side planes of the arched snap can be used as circumferential thrust surfaces, which is convenient for applying thrust force for driving rotation. The number of engagement holes in the same circumferential direction is a multiple of the number of snaps, which can reduce the idling distance and facilitate smooth and effective driving connection.

[0118] Of course, there are many other variant embodiments of the design concept of the arch spring buckle and the arch engaging groove of this embodiment. For example, the positions of any of the above-mentioned sets of cooperating arch spring buckles and arch engaging grooves can be interchanged, that is, the first arch spring buckle 2105 can be arranged on the inner wall of the output sleeve 204 and the first arch engaging groove 2042 can be arranged on the switching sleeve 210, the second arch spring buckle 2107 can be separately arranged on the input shaft 201 and the output shaft 207 and the third arch engaging groove 2078 and the second arch engaging groove 2018 are correspondingly arranged on the switching sleeve 210.

[0119] The structure of this embodiment also makes the linear cutting stapler simple, compact, low-cost, suitable for mass production, and occupies less radial space in the linear cutting stapler, which is convenient for its grasping and use. At the same time, it also solves the problem of misalignment between the switching sleeve 210 and the output shaft 207 and the output sleeve 204.

[0120] Example 4

[0121] Reference Fig.11 and Fig.12 Compared with Example 1, the main difference of this embodiment lies in the connection method of the switching sleeve 210 with the input shaft 201, the output sleeve 204 and the output shaft 207.

[0122] A sliding block is provided on the inner wall of the switching sleeve 210 , and an axial groove is provided on the outer wall of the input shaft 201 . The sliding block on the switching sleeve 210 is inserted into the axial groove in an axially sliding manner.

[0123] Two groups of protrusions are arranged at the proximal and distal ends of the switching sleeve 210, each group of protrusions includes a plurality of protrusions 2108 arranged circumferentially spaced apart, a plurality of first grooves 2043 capable of engaging with the plurality of protrusions 2108 in one group are provided on the output sleeve 204, an output shaft sleeve 217 is sleeved on the proximal end of the output shaft 207, and a plurality of second grooves 2171 capable of engaging with the plurality of protrusions 2108 in another group are provided at the proximal end of the output shaft sleeve 217.

[0124] When the switching sleeve 210 is in the first position, the sliding block on the switching sleeve 210 is located at the front of the axial groove, and the proximal protrusion 2108 of the switching sleeve 210 engages with the first groove 2043 of the output sleeve 204 to form a driving connection. At this time, the sliding block is located on the proximal side of the output shaft 207, and the distal set of protrusions is located on the proximal side of the second groove 2171, so the switching sleeve 210 does not form a driving connection with the output shaft 207.

[0125] When the switching sleeve 210 is in the second position, the sliding block on the switching sleeve 210 is located at the rear of the axial groove, and the distal protrusion 2108 of the switching sleeve 210 engages with the second groove 2171 of the output shaft 207 to form a drive connection. At this time, the proximal protrusion 2108 is located at the distal side of the first groove of the output sleeve 204, so the switching sleeve 210 does not form a drive connection with the output sleeve 204.

[0126] Of course, the implementation of the meshing protrusion 2108 and the groove is not limited to the above, and the positions of the mating protrusion 2108 and the groove can be interchanged, or only one set of protrusions is retained to be successively connected with the first groove 2043 and the second groove 2171. The meshing protrusion 2108 and the groove may not be aligned, and the rotation angle of the motor can be set to ensure that the meshing protrusion 2108 and the groove can be aligned and engaged.

[0127] Example 5

[0128] On the basis of Example 4, a protrusion 2108 can be set in a group of protrusions, two arc-shaped first grooves 2043 are set on the circumference of the output sleeve 204, and two arc-shaped second grooves 2171 are set on the circumference of the output shaft 207, which is conducive to the smooth and effective engagement of the protrusion 2108 and the groove.

[0129] Example 6

[0130] On the basis of Embodiment 4, the output shaft sleeve 217 may be eliminated, and a circumferentially spaced second groove 2171 may be provided on the front end surface of the output shaft 207, and a protrusion 2108 may be provided on the rear end inner wall of the switching sleeve 210. Alternatively, a protrusion 2108 may be provided on the front end of the output shaft 207, and a circumferentially spaced second groove 2171 may be provided on the rear end of the switching sleeve 210.

[0131] In summary of the above-mentioned embodiments 3 to 5, the selectable power transmission between the switching sleeve 210 and the input shaft 201, the output sleeve 204 and the output shaft 207 can also be achieved by providing a concave-convex matching structure between the inner wall of the switching sleeve 210 and the outer wall of the input shaft 201, a concave-convex matching structure between the switching sleeve 210 and the output sleeve 204, and a concave-convex matching structure between the switching sleeve 210 and the output shaft 207, so that when the switching sleeve 210 is in the first position, the switching sleeve 210 and the input shaft 201 The concave-convex matching structure between the switching sleeve 210 and the output sleeve 204 is driven to connect, and the concave-convex matching structure between the switching sleeve 210 and the output shaft 207 is disengaged; when the switching sleeve 210 is in the second position, the concave-convex matching structure between the switching sleeve 210 and the input shaft 201 is driven to connect, the concave-convex matching structure between the switching sleeve 210 and the output shaft 207 is driven to connect, and the concave-convex matching structure between the switching sleeve 210 and the output sleeve 204 is disengaged. The above structure also makes the linear cutting stapler simple, compact, low-cost, suitable for mass production, and the linear cutting stapler occupies a smaller radial area, which is conducive to its grasping and use.

[0132] Of course, the structures for driving connection in Examples 1-6 can be used in combination with each other and also fall within the protection scope of the present invention.

[0133] Example 7

[0134] Reference Fig.13, compared with Example 1, the main difference lies in the parallel closing device. In this embodiment, the parallel closing device includes a cantilever, one end of the cantilever is connected to the closing nut 304, and the center of the nail magazine bracket 102 is hinged to the center of the cantilever. The nail magazine bracket 102 is fixed to the cantilever by a pin and can rotate around the pin. The center of the nail magazine bracket 102 coincides with the pin. When the forces on both sides of the nail magazine bracket 102 are uneven during closing, the nail magazine bracket 102 will be pushed to rotate until the forces on the nail magazine bracket 102 are balanced.

[0135] Example 8

[0136] Reference Fig.14 , compared with Example 1, the main difference lies in the parallel closing device. In this embodiment, the parallel closing device includes two groups of left and right guide mechanisms 108, each group of guide mechanisms 108 includes a U-shaped frame 1081 and a vertical guide rail 1082, the vertical guide rail 1082 is oriented in the up and down direction (i.e., the opening and closing direction), and the bottom end of the vertical guide rail 1082 is fixedly connected to the anvil bracket 104 (for example, bolted), forming a connection position. A slider 1083 is provided at the bottom end of the U-shaped frame 1081, and the slider 1083 can be slidably inserted in the vertical guide rail, and the top of the U-shaped frame 1081 is fixed to the nail magazine bracket 102 (for example, bolted), forming two connection positions. In this way, the nail magazine bracket 102 can be prevented from tilting or horizontally staggered relative to the nail anvil bracket 104 during the up and down movement.

[0137] Example 9

[0138] Reference Fig.15 , compared with the first embodiment, the main difference lies in the parallel closing device. In this embodiment, the parallel closing device includes two sets of left and right guide mechanisms 109, each set of guide mechanisms 109 includes at least one slide rail and slider assembly, the slide rail 1091 is fixed on the nail anvil support 104, and the slider 1092 is fixed on the nail magazine support 102. If multiple slide rail and slider assemblies are provided, the multiple slide rail and slider assemblies are arranged in the axial direction. In this way, the nail magazine support 102 can also be prevented from tilting or horizontally staggering relative to the nail anvil support 104 during the up and down movement.

[0139] Example 10

[0140] Compared with the first embodiment, the main difference lies in the parallel closing device. In this embodiment, the parallel closing device includes two sets of left and right guide mechanisms, each set of guide mechanisms includes at least one gear rack assembly, the rack is fixed on the nail anvil support 104, and the gear is fixed on the nail magazine support 102. If multiple gear rack assemblies are provided, the multiple gear rack assemblies are arranged in the axial direction. In this way, the nail magazine support 102 can also be prevented from tilting or horizontally staggered relative to the nail anvil support 104 during the up and down movement.

[0141] In summary, the parallel closing device includes all structures that can promote the parallel closing of the nail magazine support 102 and the nail anvil support 104. Among them, as in Example 1, Example 8, Example 9, and Example 10, the parallel closing device is preferably connected to the nail magazine support 102 and the nail anvil support 104 at the same time, so that the parallel closing device and the closing drive mechanism are completely independent, which is more conducive to the long-term effectiveness of parallel closing. Among them, the parallel closing device and the nail magazine support 102 and the nail anvil support 104 respectively form multiple connection positions spaced along the axial direction, which is more conducive to the long-term effectiveness of parallel closing.

[0142] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A transmission device for a linear cutting stapler, characterized in that: It comprises an input shaft (201), an input shaft seat (203), an output shaft (207), an output shaft seat (209), a closing screw (303), a closing nut (304), a transmission mechanism and a main support (4); The input shaft seat (203) and the output shaft seat (209) are positioned and fixed on the main support (4); The input shaft (201) and the output shaft (207) are rotatably supported on the input shaft seat (203) and the output shaft seat (209), respectively; The axis of the closing screw (303) is perpendicular to the axis of the input shaft (201); the top end of the closing screw (303) is rotatably supported on the main support (4), and the bottom end is rotatably supported on the input shaft seat (203); The closing nut (304) is screwed onto the closing screw (303); The transmission mechanism is connected to the input shaft (201), the closing screw (303) and the output shaft (207), and can selectively convert the rotation of the input shaft (201) into the rotation of the closing screw (303) and the output shaft (207); The main support (4) comprises two side plates (401) and a connecting plate (402), wherein the two side plates (401) are located on both sides of the input shaft (201), and the connecting plate (402) is connected between the two side plates (401); The top end of the closing screw (303) is rotatably supported on the connecting plate (402); Both sides of the input shaft seat (203) and the output shaft seat (209) are respectively fixed to the two side plates (401); The transmission mechanism comprises an output sleeve (204), an output sleeve seat (206) and a switching sleeve (210); The two sides of the output sleeve seat (206) are respectively positioned and fixed to the two side plates (401); The output sleeve (204) is rotatably supported on the output sleeve seat (206), the output sleeve (204) is rotatably sleeved on the outside of the input shaft (201), and the output sleeve (204) is drivingly connected to the closing screw (303); The switching sleeve (210) is sleeved on the outside of the input shaft (201), the switching sleeve (210) is connected to the input shaft (201) in a manner that the switching sleeve (210) can be driven to rotate and the switching sleeve (210) can be axially moved between a first position and a second position, and when the switching sleeve (210) is located at the first position and the second position, the switching sleeve (210) and the input shaft (201) are drivingly connected; When the switching sleeve (210) is located at the first position, the switching sleeve (210) is connected to the output sleeve (204) in a driving rotation manner, and the switching sleeve (210) is separated from the output shaft (207); When the switching sleeve (210) is located at the second position, the switching sleeve (210) is separated from the output sleeve (204), and the switching sleeve (210) is connected to the output shaft (207) in a driving rotation manner; The input shaft (201), the output sleeve (204), the switching sleeve (210), and the output shaft (207) are coaxially arranged.

2. The transmission device of the linear cutting stapler according to claim 1, characterized in that: The output shafts (207) are arranged on one axial side of the input shaft (201) and are spaced apart.

3. The transmission device of the linear cutting stapler according to claim 1, characterized in that: The switching sleeve (210) is sleeved outside the input shaft (201) and the output shaft (207) when both are in the first position and the second position.

4. The transmission device of the linear cutting stapler according to any one of claims 1 to 3, characterized in that: The input shaft seat (203), the output shaft seat (209) and the output sleeve seat (206) are all rectangular parallelepiped or cube-shaped; The side plate (401) has a plane that abuts against the input shaft seat (203), the output shaft seat (209) and the output sleeve seat (206).

5. The transmission device of the linear cutting stapler according to claim 4, characterized in that: The side plate (401) comprises a vertical plate (4011) and a side plate (4012), wherein the side plate (4012) is connected to the lower rear side of the vertical plate (4011), and a boss (4014) is formed on the inner wall of the vertical plate (4011); The connecting plate (402) is supported on the upper end surface of the boss (4014), and is positioned and fixed to a portion of the vertical plate (4011) located above the boss (4014); The input shaft seat (203) and the output sleeve seat (206) are positioned and fixed to the portion of the vertical plate (4011) located below the boss (4014), and the output shaft seat (209) is positioned and fixed to the side plate (4012).

6. The transmission device of the linear cutting stapler according to any one of claims 1 to 3, characterized in that: The input shaft seat (203), the output shaft seat (209) and the output sleeve seat (206) are all rectangular parallelepiped or cube-shaped; The side plate (401) has a plane that abuts against the input shaft seat (203), the output sleeve seat (206) and the anvil support of the linear cutting stapler, the output shaft seat (209) is positioned and fixed inside the anvil support, and the anvil support is positioned and fixed on the inner side of the side plate (401).

7. The transmission device of the linear cutting stapler according to claim 6, characterized in that: The side plate (401) comprises a vertical plate (4011) and a side plate (4012), wherein the side plate (4012) is connected to the lower rear side of the vertical plate (4011), and a boss (4014) is formed on the inner wall of the vertical plate (4011); The connecting plate (402) is supported on the upper end surface of the boss (4014), and is positioned and fixed to a portion of the vertical plate (4011) located above the boss (4014); The input shaft seat (203) and the output sleeve seat (206) are positioned and fixed to the portion of the vertical plate (4011) located below the boss (4014), and the anvil support is positioned and fixed to the side plate (4012).

8. The transmission device of the linear cutting stapler according to any one of claims 1 to 3, characterized in that: The output shaft (207) is located at the rear side of the input shaft (201), and the switching sleeve (210) is located at the rear side of the output sleeve (204); The input shaft (201) is connected to a switching slider (211) that is axially and radially movable, the switching slider (211) being connected to the switching sleeve (210) in such a manner that they can move axially together and rotate together around the axis of the input shaft (201), and at least one of the two radial ends of the switching slider (211) protrudes outside the input shaft (201); At least two drive blocks (2041) are arranged on the hole wall of the output sleeve (204) at intervals along the circumferential direction, and any two of the drive blocks (2041) are staggered relative to the diameter; The inner wall at the rear end of the switching sleeve (210) is provided with at least two stoppers (2102) arranged at intervals in the circumferential direction, and any two of the stoppers (2102) are staggered along the diameter; A radially movable transmission slider (212) is provided on the output shaft (207), and at least one of two radial ends of the transmission slider (212) protrudes to the outside of the output shaft (207); When the switching sleeve (210) is located at the first position, the switching slider (211) corresponds to the driving block (2041) in the circumferential direction, and the stopper (2102) is located in front of the driving slider (212); When the switching sleeve (210) is located at the second position, the switching slider (211) is located at the rear side of the driving block (2041), and the stopper (2102) corresponds to the transmission slider (212) in the circumferential direction.

9. The transmission device of the linear cutting stapler according to claim 8, characterized in that: The front end of the switching slider (211) is gradually reduced, and the inner wall of the rear end of the driving block (2041) is inclined backward and outward to form an inclined surface; The inner wall of the rear end of the stopper (2102) is inclined backwards and outwards to form an inclined plane, and the front end of the transmission slider (212) is gradually reduced.

10. The transmission device of the linear cutting stapler according to claim 9, characterized in that: The input shaft (201) is provided with a strip-shaped slide groove (2015), the length direction of the strip-shaped slide groove (2015) is parallel to the axial direction of the input shaft (201), the strip-shaped slide groove (2015) passes through the radial direction of the input shaft (201), and the input shaft (201) is provided with two strip-shaped grooves (2016) separated on both sides of the strip-shaped slide groove (2015), and the length directions of the two strip-shaped grooves (2016) are along the axial direction of the input shaft (201); The switching slider (211) is inserted into the strip-shaped sliding groove (2015); a first strip-shaped hole (2111) is provided on the switching slider (211); the length direction of the first strip-shaped hole (2111) is along the radial direction of the input shaft (201); a rod body (215) passes through the first strip-shaped hole (2111) and two ends of the rod body (215) pass through the two strip-shaped grooves (2016); The output shaft (207) is provided with a radially penetrating slide groove (2075), the output shaft (207) is provided with two support holes (2074) separated on both sides of the slide groove (2075), the transmission slider (212) is provided with a second strip hole (2121), the length direction of the second strip hole (2121) is along the radial direction of the output shaft (207), a rod (216) passes through the second strip hole (2121) and the two ends of the rod (216) are supported on the two support holes (2074).

11. The transmission device of the linear cutting stapler according to claim 1, characterized in that: The transmission mechanism further comprises a switching drive member (213), wherein the switching drive member (213) comprises a toggle member (2132) and an engaging piece (2131) connected to each other; An annular groove or an annular protrusion (2103) is provided on the outer wall of the switching sleeve (210), and the engaging piece (2131) has a groove end matching the shape of the annular groove or the annular protrusion (2103), and the groove end is plugged into the annular groove or the annular protrusion (2103) so as to be relatively rotatable.

12. The transmission device of the linear cutting stapler according to claim 1, characterized in that: The transmission mechanism further comprises a switching drive member (213), the switching drive member (213) comprising a toggle member (2132), a slideway (4020) is provided on the main support (4), and an outer end of the toggle member (2132) extends from the slideway (4020) to the outside of the main support (4).

13. The transmission device of the linear cutting stapler according to claim 12, characterized in that: The slideway (4020) extends along the axial direction of the input shaft (201).

14. The transmission device of the linear cutting stapler according to claim 12, characterized in that: The slideway (4020) comprises a first slideway section (40201) and a second slideway section (40202) connected end to end, the first slideway section (40201) extending along the axial direction of the input shaft (201), the second slideway section (40202) being perpendicular to the first slideway section (40201), and the position and length of the first slideway section (40201) being configured such that the switching drive member (213) can drive the switching sleeve (210) to move between the first position and the second position by sliding on the first slideway section (40201).

15. The transmission device of the linear cutting stapler according to claim 12, characterized in that: The slideway (4020) comprises a first slideway section (40201), a second slideway section (40202) and a third slideway section (40203) connected end to end, the first slideway section (40201) and the third slideway section (40203) extending along the axial direction of the input shaft (201), the second slideway section (40202) being perpendicular to the first slideway section (40201) and the third slideway section (40203), and the tail of the third slideway section (40203) facing the first slideway section (40201). On the front side of the first slide section (40201), the position and length of the first slide section (40201) are configured such that the sliding of the switching drive member (213) on the first slide section (40201) can drive the switching sleeve (210) to move between the first position and the second position, and the position and length of the third slide section (40203) are configured such that when the switching drive member (213) stays at the rear of the third slide section (40203), the switching sleeve (210) remains connected to the output shaft (207) in a driving rotation manner.

16. The transmission device of the linear cutting stapler according to claim 1, characterized in that: The connecting plate (402) is provided with a mounting hole connected to the top end of the closing screw rod (303) via a bearing.

Images