An adjustable cutting stroke manually closed electric laparoscopic stapler

Abstract

The present invention discloses an adjustable cutting stroke manually closed electric laparoscopic stapler, characterized in that it comprises a gun body mechanism, a rotating part arranged on the gun body mechanism and a gun barrel member arranged on the gun body mechanism; the gun body mechanism comprises a housing, a stroke adjustment unit arranged in the housing, a driving unit providing power to the stroke adjustment unit, a knife return unit arranged in the housing and a safety unit arranged on the housing, and the gun barrel member and the end of the stroke adjustment unit. The stapler is formed by the gun body mechanism composed of the housing, the stroke adjustment unit, the driving unit, the knife return unit and the safety unit in cooperation with the rotating part and the gun barrel member, so as to achieve the purpose of reducing the production cost of the stapler and improving the use quality of the stapler.

Description

Technical Field

[0001] The invention relates to the field of stapler production and application, and in particular to an electric laparoscopic stapler with adjustable cutting stroke and manual closure. Background Art

[0002] At present, surgeries using laparoscopic staplers have the advantages of small incisions and quick postoperative recovery, while electric laparoscopic staplers have the advantages of easy operation and high cutting efficiency. Therefore, their market share has been increasing in recent years.

[0003] The traditional electric laparoscopic stapler body can control the suturing stroke by monitoring the stall current of the motor, so its body is compatible with components of three suturing strokes. Its body adopts an electric closed jaw working mode, and the output torque requirement of the motor is relatively high, resulting in shortcomings such as high cost of the drive motor and complex control system.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes an electric laparoscopic stapler with adjustable cutting stroke and manual closing, so as to reduce the production cost of the stapler and improve the quality of the stapler.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] It comprises a gun body mechanism, a rotating part arranged on the gun body mechanism and a gun barrel part arranged on the gun body mechanism;

[0008] The gun body mechanism includes a shell, a stroke adjustment unit arranged in the shell, a driving unit providing power to the stroke adjustment unit, a knife return unit arranged in the shell and a safety unit arranged on the shell, and the gun barrel is connected to the end of the stroke adjustment unit; the stroke adjustment unit includes a stroke rack, a stroke adjustment component matched with the stroke rack and adjusting the stroke of the stroke rack, and a bottom trigger matched with the stroke adjustment component;

[0009] The travel rack is in a rectangular shape, and a first rack and a travel control groove are respectively provided on a set of symmetrical side walls of the travel rack;

[0010] The stroke adjustment assembly includes a stroke adjustment rack, a stroke adjustment gear meshed with the stroke adjustment rack, and at least one stroke adjustment block arranged below the stroke adjustment rack; the stroke adjustment rack includes a second rack located above and a stroke adjustment base located below the second rack and having a T-shaped side surface; the front and rear sides of the vertical portion of the stroke adjustment base are respectively provided with a forward first inclined surface and a backward first inclined surface;

[0011] The stroke adjustment block includes a block base that matches the stroke adjustment base and a block arranged under the block base; the block base is provided with a placement groove for the stroke adjustment base to be placed, and the placement groove is provided with a forward second inclined surface matching the forward first inclined surface on one side above the block, and a backward second inclined surface matching the backward first inclined surface on the other side of the placement groove; when the stroke needs to be adjusted, the stroke adjustment gear is rotated, and the stroke adjustment base is driven to move under the action of the second rack. The presence of the forward first inclined surface on the stroke adjustment base and the forward second inclined surface on the block base enables the stroke adjustment base to push the stroke adjustment block that is first contacted to move toward the stroke control groove.

[0012] Preferably, the driving unit includes a motor arranged in the housing, a reducer, and a driving module arranged on the reducer;

[0013] The driving module includes a driving housing arranged above the reducer, a driving component arranged in the driving housing, a resetting component arranged on the driving housing for resetting, and a limiting component for limiting the driving component;

[0014] The driving housing is provided with a circular driving groove, the side wall of the driving groove is provided with a through hole, and the bottom of the driving groove is provided with two waist-shaped grooves that are centrally symmetrical;

[0015] The driving assembly includes a planetary gear arranged in the driving groove, a final internal gear arranged in the driving groove and matched with the planetary gear, and an output gear arranged above the planetary gear, wherein the final internal gear is arranged close to the inner wall of the driving groove, and the planetary gear is arranged inside the final internal gear and meshes with the internal gear arranged on the inner wall of the final internal gear;

[0016] The reset assembly includes a hollow mounting block matched with the through hole, a reset rack arranged in the mounting block and matched with the external gear arranged on the outer side wall of the final internal gear, and a reset rack tension spring arranged at the end of the reset rack;

[0017] The limiting assembly includes a ratchet wheel arranged on the outer wall of the final internal gear, an opening arranged on the driving housing, a mounting seat arranged on the outer side of the driving housing, a pawl arranged on the mounting seat and cooperating with the ratchet wheel, and a reset spring for resetting the pawl, and the head end of the pawl passes through the through hole and cooperates with the pawl. The driving unit composed of a motor, a reducer and a driving module reduces the difficulty of the device's demand for a motor, reduces the production cost of the stapler, and ensures the safety of the device.

[0018] Preferably, the knife return unit comprises a reset gear shaft, a support compression spring arranged on the reset gear shaft, an upper reset gear arranged on the reset gear shaft and a lower reset gear arranged on the reset gear shaft, the support compression spring is arranged between the upper reset gear and a top plate arranged on the top of the reset gear shaft, and the lower reset gear is located below the upper reset gear; the upper reset gear is meshed with the first rack;

[0019] The upper reset gear and the lower reset gear are both provided with keyways, and the keyways at the same position of the upper reset gear and the lower reset gear are in the same straight line; the reset gear shaft is provided with a spline that matches the keyway;

[0020] The upper reset gear meshes with the first rack; the lower reset gear meshes with the output gear. The return unit composed of the reset gear shaft, the support compression spring, the upper reset gear and the lower reset gear is used to realize manual reset when the motor card group cannot be reset.

[0021] Preferably, a partition is provided between the upper reset gear and the lower reset gear.

[0022] Preferably, the bottom trigger includes a vertical mounting plate, a pin arranged on one side of the mounting plate and a trigger spring arranged on the other side of the mounting plate, and the pin is arranged at the end of the travel control slot.

[0023] Preferably, the safety unit comprises a movable handle mounted on the housing through a torsion spring, a firing button arranged on the housing, a firing button safety located between the movable handle and the firing button, and a reset transmission member for resetting the movable handle;

[0024] A notch is provided on one side of the top end of the movable handle;

[0025] The firing button safety comprises a rotating shaft, an L-shaped firing rotating block arranged on the rotating shaft, and a side wall of the firing rotating block is provided with an arc surface, a straight surface and an inclined surface in sequence;

[0026] The reset transmission member includes a reset transmission pin and an arc-shaped transmission paddle. The safety performance of the device is improved by a safety unit composed of a movable handle, a firing button, a firing button safety and a reset transmission member.

[0027] 1. The present invention achieves the purpose of reducing the production cost of the stapler and improving the use quality of the stapler by forming a complete stapler through a gun body mechanism consisting of a shell, a stroke adjustment unit, a driving unit, a knife return unit and a safety unit in conjunction with a rotating part and a barrel part.

[0028] 2. The present invention realizes convenient adjustment of multiple strokes of the stapler through a stroke adjustment unit composed of a stroke rack, a stroke adjustment assembly and a bottom trigger.

[0029] 3. The present invention reduces the difficulty of the device's demand for a motor, reduces the production cost of the stapler, and ensures the safety of the device through a drive unit composed of a motor, a reducer, and a drive module.

[0030] 4. The present invention realizes manual resetting when the motor card assembly cannot be reset through a knife return unit composed of a reset gear shaft, a supporting compression spring, an upper reset gear and a lower reset gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0032] Figure 1 It is a schematic structural diagram of an electric laparoscopic stapler with adjustable cutting stroke and manual closing disclosed in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the deployment of an electric laparoscopic stapler with adjustable cutting stroke and manual closure disclosed in an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the expansion of a stroke adjustment device for manually closing an electric laparoscopic stapler disclosed in an embodiment of the present invention;

[0035] Figure 4 It is a schematic structural diagram of a stroke rack in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0036] Figure 5 It is a structural schematic diagram of a stroke adjustment component in a manual closing electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0037] Figure 6A bottom view schematic diagram of a stroke adjustment component in a manual closing electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0038] Figure 7 A schematic top view of a stroke adjustment block in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0039] Figure 8 It is a rear view schematic diagram of a stroke adjustment block in a manual closing electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0040] Fig. 9 It is a schematic diagram of the deployment of a driving unit in an electric laparoscopic stapler with adjustable cutting stroke and manual closing disclosed in an embodiment of the present invention;

[0041] Fig.10 It is a schematic structural diagram of a driving unit in an electric laparoscopic stapler with adjustable cutting stroke and manual closing disclosed in an embodiment of the present invention;

[0042] Fig.11 It is a structural schematic diagram of a waist-shaped groove in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0043] Fig.12 It is a schematic structural diagram of a final-stage internal gear in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0044] Fig.13 A cross-sectional schematic diagram of a knife return unit in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0045] Fig.14 It is a structural schematic diagram of a reset gear shaft in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0046] FIG15 is a schematic structural diagram of an upper reset gear in an electric laparoscopic stapler with adjustable cutting stroke and manual closing according to an embodiment of the present invention;

[0047] Fig.16 It is a structural schematic diagram of a safety unit in an electric laparoscopic stapler with adjustable cutting stroke and manual closing disclosed in an embodiment of the present invention;

[0048] Fig.17 It is a structural schematic diagram of a firing button safety in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0049] FIG. 18 is a schematic structural diagram of a movable handle in an electric laparoscopic stapler with adjustable cutting stroke and manual closing according to an embodiment of the present invention;

[0050] Fig.19 A schematic diagram of the structure of a reset transmission member in a manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in an embodiment of the present invention;

[0051] The numbers and letters in the figure represent the corresponding component names:

[0052] 1 Gun body mechanism 11. Housing 12. Stroke adjustment unit 121. Stroke rack 1211. First rack

[0053] 1212. Stroke control groove 1221. Stroke adjustment rack 12211. Second rack

[0054] 12212. Stroke adjustment base 12213. First forward slope 12214. First backward slope

[0055] 1222. Stroke adjustment gear 1223. Stroke adjustment block 12231. Block base 12232. Block

[0056] 12233. Placement slot 12234. Forward second slope 12235. Backward second slope 123. Bottom trigger

[0057] 1233. Trigger spring 13. Drive unit 131. Motor

[0058] 132. Reducer 1331. Driving housing 13311. Driving slot 13312. Through hole 13313. Waist-shaped slot

[0059] 13321 planetary gear 13322. final internal gear 13323. output gear 13324 block

[0060] 13331.Hollow mounting block 13332.Reset rack 13333.Reset rack tension spring 1334.Limiting assembly

[0061] 13341 ratchet 13342. opening 13343. mounting seat 13344. pawl 13345. return spring

[0062] 14. Return knife unit 141. Reset gear shaft 142. Support compression spring 143. Upper reset gear

[0063] 144. Lower reset gear 145. Keyway 146. Spline 15. Insurance unit

[0064] 151. Movable handle 1511. Notch 152. Firing button 153. Firing button safety 1531. Rotating shaft

[0065] 1532. Firing rotating block 1533. Arc surface 1534. Straight surface 1541. Reset transmission pin 1542. Arc-shaped transmission paddle 2. Rotating part 3. Pipe fitting. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0067] The present invention provides an electric laparoscopic stapler with adjustable cutting stroke and manual closing. Its working principle is that a stapler is formed by a gun body mechanism consisting of a shell, a stroke adjustment unit, a drive unit, a knife return unit and a safety unit in cooperation with a rotating part and a gun barrel part, thereby achieving the purpose of reducing the production cost of the stapler and improving the use quality of the stapler.

[0068] The present invention is further described in detail below with reference to examples and specific implementation modes.

[0069] like Figure 1-Figure 2 As shown, an adjustable cutting stroke manually closed electric laparoscopic stapler comprises a gun body mechanism 1, a rotating member 2 arranged on the gun body mechanism and a gun barrel member 3 arranged on the gun body mechanism;

[0070] The gun body mechanism includes a shell 11, a stroke adjustment unit 12 arranged in the shell, a driving unit 13 providing power to the stroke adjustment unit, a knife return unit 14 arranged in the shell and a safety unit 15 arranged on the shell, and the barrel and the end of the stroke adjustment unit.

[0071] in:

[0072] like Figure 3-Figure 8 As shown, the stroke adjustment unit 12 includes a stroke rack 121, a stroke adjustment component that cooperates with the stroke rack and adjusts the stroke of the stroke rack, and a bottom trigger 123 that cooperates with the stroke adjustment component;

[0073] The travel rack is in a rectangular shape, and a first rack 1211 and a travel control groove 1212 are respectively provided on a set of symmetrical side walls of the travel rack;

[0074] The stroke adjustment assembly includes a stroke adjustment rack 1221, a stroke adjustment gear 1222 meshing with the stroke adjustment rack, and at least one stroke adjustment block 1223 arranged below the stroke adjustment rack; the stroke adjustment rack includes a second rack 12211 located above and a stroke adjustment base 12212 located below the second rack and having a T-shaped side surface; the front and rear sides of the vertical portion of the stroke adjustment base are respectively provided with a forward first inclined surface 12213 and a backward first inclined surface 12214;

[0075] The stroke adjustment block 1223 includes a block base 12231 matched with the stroke adjustment base and a block 12232 arranged below the block base; a placement groove 12233 for placing the stroke adjustment base is provided on the block base, and a forward second slope 12234 matching the forward first slope is provided on one side of the placement groove above the block, and a backward second slope 12235 matching the backward first slope is provided on the other side of the placement groove;

[0076] The bottom trigger 123 includes a vertical mounting plate, a pin disposed on one side of the mounting plate, and a trigger spring 1233 disposed on the other side of the mounting plate, wherein the pin is disposed at the end of the travel control slot.

[0077] For example Figure 9-12 As shown, the driving unit package 13 includes a motor 131 arranged in the housing, a reducer 132, and a driving module arranged on the reducer;

[0078] The driving module includes a driving housing 1331 disposed above the reducer, a driving component disposed in the driving housing, a resetting component disposed on the driving housing for resetting, and a limiting component for limiting the driving component;

[0079] The driving housing is provided with a circular driving groove 13311, a through hole 13312 is provided on the side wall of the driving groove, and two waist-shaped grooves 13313 which are centrally symmetrical are provided at the bottom of the driving groove;

[0080] The driving assembly includes a planetary gear 13321 arranged in the driving groove, a final internal gear 13322 arranged in the driving groove and matched with the planetary gear, and an output gear 13323 arranged above the planetary gear, the final internal gear is arranged close to the inner wall of the driving groove, the planetary gear is arranged inside the final internal gear and meshes with the internal gear arranged on the inner wall of the final internal gear, and a stopper 13324 matched with the waist-shaped groove is arranged at the bottom of the final internal gear, and the stopper can move along the waist-shaped groove;

[0081] The reset assembly includes a hollow mounting block 13331 matched with the through hole, a reset rack 13332 arranged in the mounting block and matched with the external gear arranged on the outer side wall of the final internal gear, and a reset rack tension spring 13333 arranged at the end of the reset rack;

[0082] The limiting assembly includes a ratchet 13341 arranged on the outer wall of the final-stage internal gear, an opening 13342 arranged on the drive housing, a mounting seat 13343 arranged on the outer side of the drive housing, a pawl 13344 arranged on the mounting seat and cooperating with the ratchet, and a reset spring 13345 for resetting the pawl, and the head end of the pawl passes through the through hole for use with the pawl.

[0083] For example Figure 13-Figure 15 As shown, the knife return unit 14 includes a reset gear shaft 141, a support compression spring 142 arranged on the reset gear shaft, an upper reset gear 143 arranged on the reset gear shaft, and a lower reset gear 144 arranged on the reset gear shaft, wherein the support compression spring is arranged between the upper reset gear and a top plate arranged on the top of the reset gear shaft, and the lower reset gear is located below the upper reset gear; the upper reset gear is meshed with the first rack;

[0084] The upper reset gear and the lower reset gear are both provided with a keyway 145, and the keyways at the same position of the upper reset gear and the lower reset gear are in the same straight line; the reset gear shaft is provided with a spline 146 that matches the keyway;

[0085] The upper reset gear is meshed with the first rack; the lower reset gear is meshed with the output gear; and a partition is provided between the upper reset gear and the lower reset gear.

[0086] For example Figure 16-Figure 19 As shown, the safety unit 15 includes a movable handle 151 mounted on the housing through a torsion spring, a firing button 152 arranged on the housing, a firing button safety 153 between the movable handle and the firing button, and a reset transmission member for resetting the movable handle;

[0087] A notch 1511 is provided on one side of the top end of the movable handle;

[0088] The firing button safety 153 comprises a rotating shaft 1531 and an L-shaped firing rotating block 1532 arranged on the rotating shaft, and a circular arc surface 1533, a straight surface 1534 and an inclined surface are arranged on the side wall of the firing rotating block in sequence;

[0089] The reset transmission member includes a reset transmission pin 1541 and an arc-shaped transmission paddle 1542 .

[0090] The specific use steps of the present invention are as follows: The device specifically includes the following processes during use:

[0091] Process 1: The stroke adjustment process is as follows:

[0092] The pin of the bottom trigger 123 is set at the end of the stroke control groove. At this time, the stroke of the stroke control groove is 60 mm. At this time, the stroke rack can move under external power, and the maximum stroke is 60 mm.

[0093] When the stroke needs to be adjusted, the stroke adjusting gear 1222 is rotated, and the stroke adjusting base is driven to move under the action of the second rack 12211. Due to the presence of the first forward inclined surface 12213 on the stroke adjusting base 12212 and the second forward inclined surface 122341 on the block base 12231, the stroke adjusting base pushes the first contacted stroke adjusting block to move toward the stroke control groove. At this time, the block 12232 of the first stroke adjusting block 1223 is in the stroke control groove and close to the bottom trigger 123. At this time, the stroke of the stroke control groove is 45mm.

[0094] When it is necessary to adjust 30 mm, the stroke adjustment gear 1222 is rotated again on the basis of the above, so that the blocks of the two stroke adjustment blocks 1223 are both in the stroke control groove.

[0095] During the whole process, the staff can adjust it at will according to the actual situation. During the whole process, the stroke adjustment gear and the second rack are used to adjust the stroke, so the adjustment accuracy is higher.

[0096] When the suturing is completed, the stroke adjustment gear 1223 is rotated in the reverse direction. Driven by the second rack 12211, the backward first inclined surface 12214 on the stroke adjustment base pushes the backward second inclined surface 12235 on the block base, so that the stroke adjustment block is ejected from the stroke adjustment groove until the stroke rack returns to the initial position.

[0097] Process 2: The driving process is as follows:

[0098] In the set initial state, the pawl 13344 does not contact the ratchet 13341 on the final-stage internal gear 13322. When the motor 131 stops, the reduction output center wheel in the reduction box 132 cannot rotate under the action of the movable handle, and because two waist-shaped grooves 13313 are provided in the driving housing 1331, and two blocks 13324 matching the waist-shaped grooves 13313 are provided at the bottom of the final-stage internal gear 13322, the final-stage internal gear can still rotate a certain angle in the initial state until the block 13324 is at the end of the waist-shaped groove 13313. At this time, the block 13324 and the waist-shaped groove cooperate to position the final-stage internal gear. At the same time, during the rotation of the final-stage internal gear, the ratchet moves accordingly. When it rotates to the point where it can no longer rotate (the block is at the end of the waist-shaped groove 13313 at this time), the pawl just rests on the ratchet to achieve two-way fixation of the final-stage internal gear.

[0099] During the rotation of the final internal gear, the gear (which is independent of the ratchet) arranged on the outer ring of the final internal gear will drive the reset rack to move, and the reset rack 13332 will lengthen the reset rack tension spring 13333, thereby increasing the elastic force of the reset rack tension spring 13333. At this time, the motor can be turned on to perform corresponding operations.

[0100] Process 3: Manual return process is as follows:

[0101] When the jaws of the electric stapler are in a closed state, due to the large reduction ratio of the driving mechanism, the output gear cannot be rotated by the movable handle when the motor stops. At this time, the reset gear pin 451 is set to the initial state (the two sets of splines 146 on the reset gear pin are just in the keyways of the upper and lower reset gears). Then, the reset gear shaft 141 is manually pressed, and the splines in the upper reset gear do not run out of the keyway, while the splines in the lower reset gear run out of the keyway and are located below the lower reset gear (in actual process, the upper reset gear can be The keyway in the gear is set to be twice the height of the spline, and the keyway in the lower reset gear is equal to the spline height); at this time, the spline on the surface of the reset gear shaft 141 is disengaged from the keyway in the lower reset gear 144, while the spline on the surface of the reset gear shaft 141 is still in a matching state with the keyway 4531 in the upper reset gear. Therefore, when the reset gear shaft 141 is rotated at this time, the reset gear shaft 141 can drive the stroke adjustment rack 1221 to move through the upper reset gear 4143, and the lower reset gear 144 remains stationary during this process, thereby realizing the manual reset process.

[0102] Process 4: The insurance triggering process is as follows:

[0103] When the movable handle 151 is in the initial state, the inclined surface 1535 of the firing button safety 153 is restricted by the movable handle 151 and cannot rotate counterclockwise, while the firing button 152 is restricted by the straight surface 1534 of the firing button safety 153, and the firing button 471 cannot rotate counterclockwise either, that is, the safety of the electric stapler is in the open state;

[0104] When the movable handle 151 is rotated counterclockwise by a certain angle from the initial state, the movable handle 151 will release the restriction on the inclined surface 1535 of the firing button safety 153, and after the firing button safety 154 is rotated counterclockwise by a certain angle, the straight surface 1534 of the firing button safety 153 will release the restriction on the firing button 152, and the firing button 152 can now rotate counterclockwise to complete the firing action.

[0105] After the work is completed, the reset transmission part rotates clockwise under the action of the reset button, so that the reset transmission pin 1541 is separated from the recess 1511, and the restriction on the movable handle 151 is released. After the restriction is released, the movable handle 151 is reset under the action of the torsion spring arranged in the middle of the movable handle; during the resetting process, the movable handle exerts a force on the inclined surface 1535 of the firing button safety 153, so that the firing button safety rotates a certain angle, so that the arc surface 1533 on the firing rotating block releases the restriction of the firing button safety on the firing button. After the restriction is released, the firing button is reset by the tension spring arranged thereon, thereby realizing the reset of the entire safety mechanism.

[0106] Through the above method, the present invention provides an adjustable cutting stroke manually closed electric laparoscopic stapler, which is formed by a gun body mechanism composed of a shell, a stroke adjustment unit, a drive unit, a knife return unit and a safety unit in cooperation with a rotating part and a barrel part to achieve the purpose of reducing the production cost of the stapler and improving the quality of use of the stapler.

[0107] The above is only a preferred embodiment of the manually closed electric laparoscopic stapler with adjustable cutting stroke disclosed in the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An electric laparoscopic stapler with adjustable cutting stroke and manual closing, characterized in that: It comprises a gun body mechanism, a rotating part arranged on the gun body mechanism and a gun barrel part arranged on the gun body mechanism; The gun body mechanism includes a shell, a stroke adjustment unit arranged in the shell, a driving unit providing power to the stroke adjustment unit, a knife return unit arranged in the shell and a safety unit arranged on the shell, and the gun barrel is connected to the end of the stroke adjustment unit; the stroke adjustment unit includes a stroke rack, a stroke adjustment component matched with the stroke rack and adjusting the stroke of the stroke rack, and a bottom trigger matched with the stroke adjustment component; The travel rack is in a rectangular shape, and a first rack and a travel control groove are respectively provided on a set of symmetrical side walls of the travel rack; The stroke adjustment assembly includes a stroke adjustment rack, a stroke adjustment gear meshed with the stroke adjustment rack, and at least one stroke adjustment block arranged below the stroke adjustment rack; the stroke adjustment rack includes a second rack located above and a stroke adjustment base located below the second rack and having a T-shaped side surface; the front and rear sides of the vertical portion of the stroke adjustment base are respectively provided with a forward first inclined surface and a backward first inclined surface; The stroke adjustment block includes a block base that matches the stroke adjustment base and a block arranged under the block base; the block base is provided with a placement groove for the stroke adjustment base to be placed, and the placement groove is provided with a forward second inclined surface matching the forward first inclined surface on one side above the block, and a backward second inclined surface matching the backward first inclined surface on the other side of the placement groove; when the stroke needs to be adjusted, the stroke adjustment gear is rotated, and the stroke adjustment base is driven to move under the action of the second rack. The presence of the forward first inclined surface on the stroke adjustment base and the forward second inclined surface on the block base enables the stroke adjustment base to push the stroke adjustment block that is first contacted to move toward the stroke control groove.

2. The electric laparoscopic stapler with adjustable cutting stroke and manual closing according to claim 1, characterized in that: The driving unit includes a motor arranged in the housing, a reducer, and a driving module arranged on the reducer; The driving module includes a driving housing arranged above the reducer, a driving component arranged in the driving housing, a resetting component arranged on the driving housing for resetting, and a limiting component for limiting the driving component; The driving housing is provided with a circular driving groove, the side wall of the driving groove is provided with a through hole, and the bottom of the driving groove is provided with two waist-shaped grooves that are centrally symmetrical; The driving assembly includes a planetary gear arranged in the driving groove, a final internal gear arranged in the driving groove and matched with the planetary gear, and an output gear arranged above the planetary gear, wherein the final internal gear is arranged close to the inner wall of the driving groove, and the planetary gear is arranged inside the final internal gear and meshes with the internal gear arranged on the inner wall of the final internal gear; The reset assembly includes a hollow mounting block matched with the through hole, a reset rack arranged in the mounting block and matched with the external gear arranged on the outer side wall of the final internal gear, and a reset rack tension spring arranged at the end of the reset rack; The limiting assembly includes a ratchet arranged on the outer wall of the final-stage internal gear, an opening arranged on the drive housing, a mounting seat arranged on the outer side of the drive housing, a pawl arranged on the mounting seat and cooperating with the ratchet, and a reset spring for resetting the pawl, and the head end of the pawl passes through the through hole and is used in conjunction with the pawl.

3. The electric laparoscopic stapler with adjustable cutting stroke and manual closing according to claim 2, characterized in that: The knife return unit includes a reset gear shaft, a support compression spring arranged on the reset gear shaft, an upper reset gear arranged on the reset gear shaft, and a lower reset gear arranged on the reset gear shaft, wherein the support compression spring is arranged between the upper reset gear and a top plate arranged on the top of the reset gear shaft, and the lower reset gear is located below the upper reset gear; the upper reset gear is meshed with the first rack; The upper reset gear and the lower reset gear are both provided with keyways, and the keyways at the same position of the upper reset gear and the lower reset gear are in the same straight line; the reset gear shaft is provided with a spline that matches the keyway; The upper reset gear is meshed with the first rack; the lower reset gear is meshed with the output gear.

4. The electric laparoscopic stapler with adjustable cutting stroke and manual closing according to claim 3, characterized in that: A partition is arranged between the upper reset gear and the lower reset gear.

5. The electric laparoscopic stapler with adjustable cutting stroke and manual closing according to claim 1, characterized in that: The bottom trigger includes a vertical mounting plate, a pin arranged on one side of the mounting plate, and a trigger spring arranged on the other side of the mounting plate, wherein the pin is arranged at the end of the travel control slot.

6. The electric laparoscopic stapler with adjustable cutting stroke and manual closing according to claim 1, characterized in that: The safety unit includes a movable handle mounted on the housing through a torsion spring, a firing button arranged on the housing, a firing button safety located between the movable handle and the firing button, and a reset transmission member for resetting the movable handle; A notch is provided on one side of the top end of the movable handle; The firing button safety comprises a rotating shaft, an L-shaped firing rotating block arranged on the rotating shaft, and a side wall of the firing rotating block is provided with an arc surface, a straight surface and an inclined surface in sequence; The reset transmission member includes a reset transmission pin and an arc-shaped transmission paddle.

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