Electric stapler

Abstract

The present invention provides an electric stapler, comprising a jaw drive assembly, a cutting knife drive assembly and a drive assembly connecting the jaw drive assembly and the cutting knife drive assembly, wherein the drive assembly comprises a motor, a clutch structure connected to the motor, and a first drive member and a second drive member respectively arranged on both sides of the clutch structure. The first drive member is connected to the jaw drive assembly, and the second drive member is connected to the cutting knife drive assembly. The motor is used to drive the clutch structure to connect to the first drive member or the second drive member to drive the jaw drive assembly or the cutting knife drive assembly to move. Compared with the prior art, the electric stapler of the present invention utilizes the movement of the clutch structure in the up and down directions to divide the torque output by the motor into two directions of transmission force, thereby realizing the same motor driving the opening and closing of the front jaws of the electric stapler and the advance and retreat of the cutting knife, while also reducing the production cost and the volume of the electric stapler.

Description

Technical Field

[0001] The invention relates to an electric stapler, belonging to the technical field of staplers. Background Art

[0002] Staplers are medical devices that replace manual suturing. Their main working principle is to use titanium nails to separate or staple tissues, similar to staplers. According to different application scopes, they can be mainly divided into skin staplers, digestive tract (esophagus, gastrointestinal, etc.) circular staplers, rectal staplers, circular hemorrhoid staplers, circumcision staplers, vascular staplers, hernia staplers, lung cutting staplers, etc.

[0003] In the existing electric staplers, after the controller obtains the signal to start the firing drive mechanism, the controller controls the motor to start, the motor drives the drive mechanism to operate, and after the drive mechanism drives the cutting knife to move forward, the cutting knife cuts the human tissue.

[0004] Electric staplers are generally equipped with two motors and two transmission mechanisms to control the opening and closing of the jaws and the movement of the cutting knife. They are complex and difficult to operate, and two sets of drive motors will increase the size and cost.

[0005] In view of this, it is indeed necessary to improve the existing electric stapler to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an electric stapler, which drives the opening and closing of the jaws and the advancement and retreat of the cutting knife respectively by the same motor, thereby reducing the size of the electric stapler and reducing the cost.

[0007] To achieve the above-mentioned purpose, the present invention provides an electric stapler, comprising a jaw drive assembly, a cutting knife drive assembly and a drive assembly connecting the jaw drive assembly and the cutting knife drive assembly, the drive assembly comprising a motor, a clutch structure connected to the motor, and a first drive member and a second drive member respectively arranged on both sides of the clutch structure, the first drive member being connected to the jaw drive assembly, the second drive member being connected to the cutting knife drive assembly, the motor being used to drive the clutch structure to connect to the first drive member or the second drive member to drive the jaw drive assembly or the cutting knife drive assembly to operate.

[0008] As a further improvement of the present invention, the clutch structure includes a clutch bracket and a clutch arranged on the clutch bracket, the first driving member is a first gear, the second driving member is a second gear, the motor is provided with a motor shaft, the motor shaft passes through the first gear, the clutch and the second gear from bottom to top, and the clutch can move up and down along the motor shaft to engage with the first gear or the second gear.

[0009] As a further improvement of the present invention, the clutch is provided with a first positioning tooth on the side facing the first gear, and a second positioning tooth on the side facing the second gear, the first gear is correspondingly provided with a first tooth groove on the side facing the clutch, and the second gear is correspondingly provided with a second tooth groove on the side facing the clutch; when the clutch is engaged with the first gear, the first positioning tooth is clamped in the first tooth groove, so that the motor drives the clutch to drive the first gear to rotate synchronously; when the clutch is engaged with the second gear, the second positioning tooth is clamped in the second tooth groove, so that the motor drives the clutch to drive the second gear to rotate synchronously.

[0010] As a further improvement of the present invention, a chamfered structure is provided at the outer edge of the first positioning tooth to guide the first positioning tooth into the first tooth groove so that the clutch is engaged with the first gear; a chamfered structure is also provided at the outer edge of the second positioning tooth to guide the second positioning tooth into the second tooth groove so that the clutch is engaged with the second gear.

[0011] As a further improvement of the present invention, the clutch bracket includes a bracket shaft, a sleeve portion sleeved on the bracket shaft and capable of sliding along the bracket shaft, and a fork frame portion and a magnetic attraction portion extending outward from the outer peripheral wall of the sleeve portion. The bracket shaft is fixed in the main body of the electric stapler, and an annular groove is recessed on the outer peripheral wall of the clutch. The fork frame portion is inserted into the annular groove and loosely fits. The clutch structure also includes an electromagnet, which is arranged on the side of the first gear and aligned with the magnetic attraction portion so that the magnetic attraction portion is attracted to the electromagnet after the electromagnet is energized, and the fork frame portion drives the clutch to move downward to engage with the first gear.

[0012] As a further improvement of the present invention, the clutch structure also includes a clutch spring arranged between the clutch and the first gear. When the electromagnet is energized, the magnetic attraction part is attracted to the electromagnet and the clutch spring is compressed. When the electromagnet is de-energized, the clutch spring pushes the clutch to move toward the second gear, so that the magnetic attraction part is disengaged from the electromagnet and the clutch is meshed with the second gear.

[0013] As a further improvement of the present invention, the first driving member is a first gear, the jaw driving assembly includes a jaw and a jaw driving rack connecting the jaw to the first gear, the jaw driving rack is engaged with the first gear, so that when the clutch structure drives the first gear to rotate, the jaw driving rack is driven forward to push the jaw to close or backward to open the jaw.

[0014] As a further improvement of the present invention, the jaw drive assembly also includes a first switch and a second switch arranged in the main body of the electric stapler, the jaw drive rack includes a horizontally extending first drive portion and a second drive portion arranged perpendicular to one end of the first drive portion, the second drive portion is connected to the jaw and can drive the jaw to close or open, the first drive portion is provided with a baffle extending toward one side of the motor and a convex rib extending away from one side of the motor, the baffle is arranged close to the second drive portion, so that when the jaw is fully opened, the baffle contacts the first switch to stop the motor; the convex rib is arranged away from the second drive portion, so that when the jaw is fully closed, the convex rib contacts the second switch to stop the motor.

[0015] As a further improvement of the present invention, a mating tooth protruding toward the first gear is further provided on the end of the first driving part away from the second driving part, and the mating tooth is meshed with the first gear to drive the jaw driving rack to move forward and backward when the first gear rotates; a toothless area is provided on the side of the mating tooth away from the second driving part, and the toothless area is used to cooperate with the first gear to limit the jaw driving rack from continuing to move forward when the motor cannot stop.

[0016] As a further improvement of the present invention, the second driving member is a second gear, and the cutting knife driving assembly includes a cutting knife, a cutting knife driving rack connected to the cutting knife, and a third gear connecting the cutting knife driving rack and the second gear. When the clutch structure drives the second gear to rotate, the second gear drives the third gear to engage with the cutting knife driving rack, so that the cutting knife driving rack pushes the cutting knife to move forward or pulls the cutting knife to move backward.

[0017] As a further improvement of the present invention, the driving assembly also includes a circuit board housed in the main body of the electric stapler, sensors are provided at both ends of the circuit board, and a sensor sheet is provided on the cutting knife driving rack. When the cutting knife driving rack pushes the cutting knife forward / backward to the end position, the sensor sheet and the corresponding sensor sense each other, causing the motor to stop and the cutting knife to stop moving.

[0018] As a further improvement of the present invention, the cutting knife driving rack is provided with meshing teeth protruding toward the third gear, and the meshing teeth are meshed with the third gear to drive the cutting knife driving rack to move forward and backward when the second gear and the third gear are meshed with each other and rotate; a toothless section is provided at one end of the meshing teeth close to the cutting knife, and the toothless section is used to cooperate with the third gear to limit the cutting knife driving rack from continuing to retreat when the motor cannot stop.

[0019] The beneficial effect of the present invention is that the electric stapler of the present invention is provided with a clutch structure connected to the motor, and the first drive member and the second drive member are respectively provided on the upper and lower sides of the clutch structure, so that the motor can drive the clutch structure to drive the first drive member or the second drive member to rotate after the clutch structure is engaged with the first drive member or the second drive member, and then drive the jaw drive assembly or the cutting knife drive assembly to move. Compared with the prior art, the electric stapler of the present invention utilizes the movement of the clutch structure in the up and down directions to divide the torque output by the motor into two directions of transmission force, so as to realize the opening and closing of the front jaw of the electric stapler and the advance and retreat of the cutting knife driven by the same motor, and at the same time, it also reduces the production cost, reduces the weight and volume of the electric stapler, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of an electric stapler according to a preferred embodiment of the present invention.

[0021] Figure 2 yes Figure 1 The schematic diagram of the structure of the electric stapler after removing the outer shell is shown.

[0022] Figure 3 yes Figure 2 Cross-sectional view of the clutch structure.

[0023] Figure 4 yes Figure 2 Schematic diagram of the local structure.

[0024] Figure 5 yes Figure 4 Schematic diagram of the engagement between the middle jaw drive rack and the first drive member.

[0025] Figure 6 It is a schematic diagram of the meshing of the third gear and the cutting knife driving rack.

[0026] Figure 7 yes Figure 5 Schematic diagram of the structure of the middle jaw drive rack.

[0027] Figure 8 This is a schematic diagram of the circuit board and the cutting knife drive rack inductively interacting with each other.

[0028] Fig. 9 It is a schematic diagram of the assembly structure of the clutch structure and the drive component.

[0029] Fig.10 yes Fig. 9 Schematic diagram of the structure of the clutch bracket.

[0030] Fig.11 yes Fig. 9 Schematic diagram of the clutch structure.

[0031] Fig.12 yes Fig.11 Another angle schematic diagram of the clutch shown.

[0032] Fig.13 yes Fig.11 Another angle schematic diagram of the clutch shown.

[0033] Fig.14 yes Fig. 9 Schematic diagram of the structure of the first driving member.

[0034] Fig.15 yes Fig. 9 Schematic diagram of the structure of the second driving member. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See also Figure 1-Figure 15 As shown, the present invention discloses an electric stapler 100, comprising a jaw drive assembly 1, a cutting knife drive assembly 2, and a drive assembly connecting the jaw drive assembly 1 and the cutting knife drive assembly 2, wherein the drive assembly comprises a motor 31, a clutch structure 32 connected to the motor 31, and a first drive member 33 and a second drive member 34 respectively arranged on both sides of the clutch structure 32. The first drive member 33 is engaged with the jaw drive assembly 1, and the second drive member 34 is engaged with the cutting knife drive assembly 2. The motor 31 is used to drive the clutch structure 32 to drive the first drive member 33 or the second drive member 34 to rotate after the clutch structure 32 is engaged with the first drive member 33 or the second drive member 34, and then drive the jaw drive assembly 1 or the cutting knife drive assembly 2 to move. That is to say, the electric stapler 100 of the present invention can divide the torque output by the motor 31 into transmission forces in two directions, so that the same motor 31 can drive the opening and closing of the front jaw of the electric stapler 100 and the advance and retreat of the cutting knife.

[0037] See also Figure 1 to Figure 2 As shown, the electric stapler 100 includes a main body 4 and a gripping portion 5 perpendicular to the main body 4, the clutch structure 32, the first driving member 33 and the second driving member 34 are all accommodated in the main body 4, and the motor 31 is accommodated in the gripping portion 5. The gripping portion 5 is also provided with a forward switch 51 and a backward switch 52 electrically connected to the motor 31. After the forward switch 51 / backward switch 52 is activated, the motor 31 starts to rotate and drives the clutch structure 32 to drive the first driving member 33 or the second driving member 34 to rotate, thereby driving the jaws to open and close or the cutting knife to advance and retreat.

[0038] See also Figures 2 to 5As shown, the clutch structure 32 includes a clutch bracket 321 and a clutch 322 arranged on the clutch bracket 321, the first driving member 33 is a first gear, the second driving member 34 is a second gear, the motor 31 is fixed on the motor bracket 312, and the motor 31 is provided with a motor shaft 311. The motor shaft 311 passes through the first gear, the clutch 322 and the second gear from bottom to top, and the clutch 322 can move up and down along the motor shaft 311 to engage with the first gear or the second gear.

[0039] See also Fig.14 As shown, preferably, a first gear hole 332 is opened in the center of the first gear, the inner ring of the first gear bearing 333 is fixed on the motor bracket 312 and is concentric with the motor shaft 311, and the first gear hole 332 and the first gear bearing 333 are interference fit. Such a configuration prevents the motor 31 from directly driving the first gear when rotating, and ensures that the first gear is driven only by the clutch 322.

[0040] See also Fig.15 As shown, preferably, a second gear hole 342 is opened at the center of the second gear, and the diameter of the second gear hole 342 is larger than the diameter of the motor shaft 311. This arrangement prevents the motor 31 from directly driving the second gear when rotating, and ensures that the second gear is driven only by the clutch 322.

[0041] See also Figures 9 to 15 As shown, the clutch 322 is provided with a first positioning tooth 3221 on the side facing the first gear, and a second positioning tooth 3222 on the side facing the second gear, and the first gear is correspondingly provided with a first tooth groove 331 on the side facing the clutch 322, and the second gear is correspondingly provided with a second tooth groove 341 on the side facing the clutch 322. When the clutch 322 is meshed with the first gear, the first positioning tooth 3221 is clamped in the first tooth groove 331, and is used to transfer the radial torque of the motor shaft 311 from the clutch 322 to the first gear, that is, the motor 31 drives the clutch 322 to drive the first gear to rotate synchronously; when the clutch 322 is meshed with the second gear, the second positioning tooth 3222 is clamped in the second tooth groove 341, and is used to transfer the radial torque of the motor shaft 311 from the clutch 322 to the second gear, that is, the motor 31 drives the clutch 322 to drive the second gear to rotate synchronously.

[0042] A chamfered structure is provided at the outer edge of the first positioning tooth 3221 to guide the first positioning tooth 3221 into the first tooth groove 331 so that the clutch 322 engages with the first gear; a chamfered structure is also provided at the outer edge of the second positioning tooth 3222 to guide the second positioning tooth 3222 into the second tooth groove 341 so that the clutch 322 engages with the second gear.

[0043] Preferably, the chamfered structure is a C-angle with a certain slope, which can guide the clutch 322 to mesh with the first gear or the second gear. That is, when the clutch 322 moves up and down, it can guide the first positioning tooth 3221 into the first tooth groove 331, so that the clutch 322 meshes with the first gear; it can also guide the second positioning tooth 3222 into the second tooth groove 341, so that the clutch 322 meshes with the second gear, and has the function of automatic alignment.

[0044] See also Figures 9 and 10 As shown, the clutch bracket 321 includes a bracket shaft 3211, a sleeve portion 3212 sleeved on the bracket shaft 3211 and capable of sliding along the bracket shaft 3211, and a fork portion 3213 and a magnetic portion 3214 extending outward from the outer peripheral wall of the sleeve portion 3212. Preferably, the sleeve portion 3212 and the bracket shaft 3211 are clearance-matched to facilitate their up and down sliding. The magnetic portion 3214 can be made of any magnetic material, and is mainly used for adsorption with the electromagnet 323.

[0045] The support shaft 3211 is fixed in the main body 4 of the electric stapler 100. An annular groove 3223 is recessed on the outer peripheral wall of the clutch 322. The fork frame 3213 is used to be inserted into the annular groove 3223 and to fit with the annular groove 3223, so that the clutch 322 can rotate smoothly.

[0046] The clutch structure 32 also includes an electromagnet 323, which is arranged beside the first gear and aligned with the magnetic attraction portion 3214. After the electromagnet 323 is energized, the electromagnet 323 can be used to attract the magnetic attraction portion 3214, and then the fork portion 3213 drives the clutch 322 to move downward to engage with the first gear. At this time, the clutch 322 can drive the first gear to rotate, thereby controlling the opening and closing of the jaws.

[0047] In the present invention, in the initial state, the distance between the magnetic attraction portion 3214 and the electromagnet 323 is H1. After the electromagnet 323 is energized, the magnetic attraction portion 3214 is adsorbed downward, and the height to which the magnetic attraction portion 3214 descends is H1. The height of the first positioning tooth 3221 from the first tooth groove 331 of the first gear is defined as H2, then H1≥H2, to ensure that the clutch 322 is fully engaged with the first tooth groove 331. Preferably, the magnetic attraction portion 3214 is formed by a circular metal sheet to facilitate the adsorption of the electromagnet 323. Of course, in other embodiments, the magnetic attraction portion 3214 can also be set in other shapes or other structures, as long as it can be adsorbed by the electromagnet 323 when the electromagnet 323 is energized, and there is no limitation here.

[0048] See also Figure 3As shown, the clutch structure 32 also includes a clutch spring 324 disposed between the clutch 322 and the first gear. When the electromagnet 323 is powered on, the magnetic attraction portion 3214 is attracted to the electromagnet 323, and the clutch spring 324 is compressed; and when the electromagnet 323 is powered off, the clutch spring 324 can push the clutch 322 to move toward the second gear, so that the magnetic attraction portion 3214 is separated from the electromagnet 323, and the clutch 322 is meshed with the second gear. In this embodiment, the setting of the clutch spring 324 can help the clutch 322 to mesh with the second gear, and then control the movement of the cutting knife drive assembly 2.

[0049] See also Fig.12 As shown, a hole 3224 is provided at the center of the clutch 322, and the hole 3224 is preferably a round hole with a flat position, and the round hole with a flat position cooperates with the motor shaft 311, and the cooperation method includes common methods such as clearance cooperation. Such a setting can play a role in preventing stupidity and preventing the clutch 322 from rotating randomly.

[0050] Please combine Figure 2 and Figure 4 As shown, the jaw drive assembly 1 includes a jaw and a jaw drive rack 12 connecting the jaw to a first gear. The jaw drive rack 12 is meshed with the first gear, so that when the clutch structure 32 drives the first gear to rotate, the jaw drive rack 12 can be driven forward to push the jaw closed or backward to open the jaw.

[0051] See also Figures 9 to 14 As shown, in this embodiment, when the motor 31 rotates clockwise, the clutch 322 can be driven to rotate clockwise. Since the first positioning tooth 3221 of the clutch 322 is clamped in the first tooth groove 331 of the first gear, the clutch 322 can drive the first gear to rotate clockwise, and the first gear is meshed with the jaw drive rack 12, so the jaw drive rack 12 can be driven by the first gear to push the jaw forward to close. On the contrary, when the motor 31 rotates counterclockwise, the clutch 322 can be driven to rotate counterclockwise. Since the clutch 322 is meshed with the first gear, the clutch 322 can drive the first gear to rotate counterclockwise, and the first gear is meshed with the jaw drive rack 12, so the jaw drive rack 12 can be driven by the first gear to retreat to open the jaw. In this way, the opening and closing of the jaw are completed.

[0052] Combination Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, the jaw drive assembly 1 also includes a first switch 13 and a second switch 14 disposed in the main body 4 of the electric stapler 100. The jaw drive rack 12 includes a first drive portion 121 extending horizontally and a second drive portion 122 disposed perpendicularly to one end of the first drive portion 121, and the second drive portion 122 is connected to the jaws and can drive the jaws to close or open.

[0053] Preferably, the jaw driving rack 12 extends out from one end away from the motor 31 and is provided with a matching hole 1215, and the matching hole 1215 is used to cooperate with the jaw pushing slider on the jaw driving assembly 1 to help push the jaw.

[0054] The first driving portion 121 is provided with a blocking piece 1211 extending toward one side of the motor 31 and a convex rib 1212 extending away from the side of the motor 31. The blocking piece 1211 is arranged close to the second driving portion 122 so that when the jaws are fully opened, the blocking piece 1211 can contact the first switch 13 to stop the motor 31; the convex rib 1212 is arranged away from the second driving portion 122 so that when the jaws are fully closed, the convex rib 1212 can contact the second switch 14 to stop the motor 31.

[0055] The end of the first driving part 121 away from the second driving part 122 is also provided with a matching tooth 1213 protruding toward the first gear. The matching tooth 1213 meshes with the first gear to drive the jaw drive rack 12 to move forward and backward when the first gear rotates; the setting length of the matching tooth 1213 determines the distance that the jaw drive rack 12 moves forward and backward. A toothless area 1214 is provided on the side of the matching tooth 1213 away from the second driving part 122. The toothless area 1214 is used to cooperate with the first gear to limit the jaw drive rack 12 from continuing to move forward when the motor 31 cannot stop. In other words, after the jaw drive rack 12 has traveled the length of the matching tooth 1213, the jaws are completely closed. At this time, the convex rib 1212 contacts the second switch 14, and the motor 31 is powered off and stopped. If the motor 31 does not stop and continues to rotate clockwise, at this time, the first gear rotates to cooperate with the toothless area 1214, and the jaw drive rack 12 cannot continue to advance.

[0056] Preferably, a spring groove 1216 is provided at one end of the first driving portion 121 close to the toothless area 1214, and the spring groove 1216 is elastically connected to a jaw driving rack spring 1217 through a spring stopper. The jaw driving rack spring 1217 is generally in a compressed state, and when the first gear rotates counterclockwise, the jaw driving rack spring 1217 extends to help the jaw driving rack 12 re-engage the first gear.

[0057] See also Figure 4 and Figure 5As shown, the cutting knife driving assembly 2 includes a cutting knife, a cutting knife driving rack 22 connected to the cutting knife, and a third gear 23 connecting the cutting knife driving rack 22 and the second gear. When the clutch structure 32 drives the second gear to rotate, the second gear engages with the third gear 23, and the third gear 23 engages with the cutting knife driving rack 22, so that the cutting knife driving rack 22 pushes the cutting knife to move forward or pulls the cutting knife to move backward.

[0058] Preferably, one end of the cutting knife driving rack 22 away from the third gear 23 is elastically connected with a cutting knife driving rack spring 224. When the motor 31 reverses, the cutting knife driving rack spring 224 provides elastic force to facilitate the cutting knife driving rack 22 to re-engage the second gear.

[0059] See also Figures 2 to 4 As shown, in this embodiment, after the forward switch 51 is pressed, the motor 31 rotates counterclockwise, driving the clutch 322 to rotate counterclockwise, the clutch 322 drives the second gear to rotate counterclockwise, the second gear engages the third gear 23, and the third gear 23 engages with the cutting knife driving rack 22, the third gear 23 rotates clockwise, the cutting knife driving rack 22 advances forward, and pushes the cutting knife forward. On the contrary, after the backward switch 52 is pressed, the motor 31 rotates clockwise, driving the clutch 322 to rotate clockwise, the clutch 322 drives the second gear to rotate clockwise, the second gear engages the third gear 23, and the third gear 23 engages with the cutting knife driving rack 22, the third gear 23 rotates counterclockwise, the cutting knife driving rack 22 retreats, and drives the cutting knife to move backward. In this way, the forward and backward movement of the cutting knife is completed.

[0060] See also Figure 8 As shown, the driving assembly 3 also includes a circuit board 35 housed in the main body 4 of the electric stapler 100. Sensors 351 are provided at both ends of the circuit board 35. A sensor sheet 221 is provided on the cutting knife driving rack 22. When the cutting knife driving rack 22 pushes the cutting knife to move forward / backward to the end position, the sensor sheet 221 and the corresponding sensor 351 sense each other, causing the motor 31 to stop rotating and the cutting knife to stop moving.

[0061] In this embodiment, when the cutting blade moves to the end position, the induction sheet 221 is just in the induction slot of the corresponding inductor 351, and the motor 31 stops rotating, and the cutting blade stops moving forward.

[0062] See also Figure 6As shown, the cutting blade driving rack 22 is also provided with a meshing tooth 222 protruding toward the third gear, and the meshing tooth 222 meshes with the third gear, so that when the third gear rotates, the cutting blade driving rack 22 can be driven to move forward and backward; the meshing tooth 222 is provided with a toothless section 223 at one end close to the cutting blade, and the toothless section 223 is used to cooperate with the third gear 23 to limit the cutting blade driving rack 22 from continuing to retreat when the motor 31 cannot stop. In other words, when the cutting blade driving rack 22 retreats to the initial position, if the motor 31 does not stop and continues to rotate counterclockwise, at this time, the third gear 23 rotates to cooperate with the toothless section 223 on the cutting blade driving rack 22, and the cutting blade driving rack 22 cannot continue to retreat.

[0063] The specific movement process of the jaw drive assembly 1 is as follows: after the electromagnet 323 is energized, the clutch bracket 321 is sucked down by the magnetic force, and the clutch 322 is meshed with the first gear. When the forward switch 51 is pressed, the motor 31 rotates clockwise and drives the first gear to rotate clockwise. The first gear meshes with the jaw drive rack 12, and the jaw drive rack 12 is driven by the first gear to move forward and push the jaws to close. When the jaws are fully closed, the first gear is in the toothless area 1214 of the jaw drive rack 12. Even if the electric control fails, the jaw drive rack 12 will not continue to move forward. At the same time, the rib 1212 of the jaw drive rack 12 contacts the second switch 14, disconnecting the power supply of the motor 31.

[0064] When the jaws are completely closed or need to be reopened during the closing process, the retraction switch 52 is pressed, and the clutch 322 drives the first gear to rotate counterclockwise. The jaw driving rack 12 engages with the first gear, and the jaw driving rack 12 moves backward under the drive of the first gear, and the jaws are pulled and gradually open. When the jaws are fully opened, the blocking piece 1211 contacts the first switch 13, causing the motor 31 to stop.

[0065] The specific movement process of the cutting knife driving assembly 2 is as follows: after the jaws are completely closed, the electromagnet 323 is powered off, and the magnetic force on the clutch bracket 321 disappears. The clutch spring 324 bounces up the clutch 322, so that the clutch 322 is engaged with the second gear. Press the forward switch 51, the motor 31 rotates counterclockwise, so that the clutch 322 drives the second gear to rotate counterclockwise, and the second gear is engaged with the third gear 23, so that the third gear 23 rotates clockwise. The meshing teeth 222 are engaged with the third gear 23, and the third gear 23 drives the cutting knife to drive the rack 22 forward, that is, pushes the cutting knife forward; when the cutting knife advances to the maximum position, the induction sheet 221 just enters the induction slot of the corresponding sensor 351, and at this time the electronic control system controls the motor 31 to stop, and the cutting knife stops moving forward.

[0066] When the cutting knife needs to move backward, the backward switch 52 is pressed, and the motor 31 rotates clockwise, so that the clutch 322 drives the second gear to rotate clockwise, and the third gear 23 engages with the second gear, and the third gear 23 rotates counterclockwise, and the third gear 23 engages with the cutting knife driving rack 22, and the third gear 23 drives the cutting knife driving rack 22 to move backward, pulling the cutting knife to gradually move backward. When the cutting knife returns to the initial position, the induction sheet 221 just enters the corresponding induction slot of another inductor 351, and at this time the electric control system controls the motor 31 to stop, and the cutting knife stops moving backward. Of course, if the motor 31 fails to stop, the toothless section 223 of the cutting knife driving rack 22 will cooperate with the third gear 23 to idle, so that the cutting knife will not continue to move backward, doubly ensuring safety.

[0067] It should be noted that, in normal use, the opening and closing of the jaws and the advance and retreat of the cutting knife of the present invention are executed separately according to a certain rule: first control the jaws to close, then control the cutting knife to advance, then control the cutting knife to retreat, and finally control the jaws to open. Of course, if there are special needs, the electronic control system can also be adjusted to formulate new rules, which is not limited here.

[0068] In summary, the electric stapler 100 of the present invention is provided with a clutch structure 32 connected to the motor 31, and the first driving member 33 and the second driving member 34 are respectively provided on the upper and lower sides of the clutch structure 32, so that the motor 31 can drive the clutch structure 32 to drive the first driving member 33 or the second driving member 34 to rotate after the clutch structure 32 is engaged with the first driving member 33 or the second driving member 34, and then drive the jaw drive assembly 1 or the cutting knife drive assembly 2 to move. Compared with the prior art, the electric stapler 100 of the present invention utilizes the movement of the clutch structure 32 in the up and down directions to divide the torque output by the motor 31 into two directions of transmission force, so that the same motor 31 drives the opening and closing of the front jaw of the electric stapler 100 and the advance and retreat of the cutting knife, while also reducing the production cost, reducing the volume and weight of the electric stapler 100, and improving the user experience.

[0069] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An electric stapler, comprising a jaw drive assembly, a cutting knife drive assembly and a drive assembly connecting the jaw drive assembly and the cutting knife drive assembly, characterized in that: The driving assembly includes a motor, a clutch structure connected to the motor, and a first driving member and a second driving member respectively arranged on both sides of the clutch structure, the first driving member is connected to the jaw driving assembly, and the second driving member is connected to the cutting knife driving assembly, and the motor is used to drive the clutch structure to connect to the first driving member or the second driving member to drive the jaw driving assembly or the cutting knife driving assembly to move; The clutch structure includes a clutch bracket and a clutch arranged on the clutch bracket, the first driving member is a first gear, the second driving member is a second gear, the motor is provided with a motor shaft, the motor shaft passes through the first gear, the clutch and the second gear from bottom to top, and the clutch can move up and down along the motor shaft to mesh with the first gear or the second gear; The clutch bracket includes a bracket shaft, a sleeve portion sleeved on the bracket shaft and capable of sliding along the bracket shaft, and a fork frame portion and a magnetic attraction portion extending outward from the outer peripheral wall of the sleeve portion. The bracket shaft is fixed in the main body of the electric stapler, and an annular groove is recessed on the outer peripheral wall of the clutch. The fork frame portion is inserted into the annular groove and loosely fits. The clutch structure also includes an electromagnet, which is arranged on the side of the first gear and aligned with the magnetic attraction portion so that the magnetic attraction portion is attracted to the electromagnet after the electromagnet is energized, and the fork frame portion drives the clutch to move downward to mesh with the first gear.

2. The electric stapler according to claim 1, characterized in that: The clutch is provided with a first positioning tooth on the side facing the first gear and a second positioning tooth on the side facing the second gear. The first gear is correspondingly provided with a first tooth groove on the side facing the clutch, and the second gear is correspondingly provided with a second tooth groove on the side facing the clutch. When the clutch is engaged with the first gear, the first positioning tooth is clamped in the first tooth groove, so that the motor drives the clutch to rotate synchronously with the first gear. When the clutch is engaged with the second gear, the second positioning tooth is clamped in the second tooth groove, so that the motor drives the clutch to rotate synchronously with the second gear.

3. The electric stapler according to claim 2, characterized in that: A chamfered structure is provided at the outer edge of the first positioning tooth to guide the first positioning tooth into the first tooth groove so that the clutch is engaged with the first gear; a chamfered structure is also provided at the outer edge of the second positioning tooth to guide the second positioning tooth into the second tooth groove so that the clutch is engaged with the second gear.

4. The electric stapler according to claim 1, characterized in that: The clutch structure also includes a clutch spring arranged between the clutch and the first gear. When the electromagnet is energized, the magnetic attraction part is attracted to the electromagnet and the clutch spring is compressed. When the electromagnet is de-energized, the clutch spring pushes the clutch to move toward the second gear, so that the magnetic attraction part is separated from the electromagnet and the clutch is meshed with the second gear.

5. The electric stapler according to claim 1, characterized in that: The first driving member is a first gear, and the jaw driving assembly includes a jaw and a jaw driving rack connecting the jaw to the first gear, and the jaw driving rack is engaged with the first gear so that when the clutch structure drives the first gear to rotate, the jaw driving rack is driven forward to push the jaw to close or backward to open the jaw.

6. The electric stapler according to claim 5, characterized in that: The jaw drive assembly also includes a first switch and a second switch arranged in the main body of the electric stapler, the jaw drive rack includes a first drive portion extending horizontally and a second drive portion arranged perpendicular to one end of the first drive portion, the second drive portion is connected to the jaw and can drive the jaw to close or open, the first drive portion is provided with a baffle extending toward one side of the motor and a convex rib extending away from one side of the motor, the baffle is arranged close to the second drive portion, so that when the jaw is fully opened, the baffle contacts the first switch to stop the motor; the convex rib is arranged away from the second drive portion, so that when the jaw is fully closed, the convex rib contacts the second switch to stop the motor.

7. The electric stapler according to claim 6, characterized in that: A mating tooth protruding toward the first gear is further provided at the end of the first driving part away from the second driving part, and the mating tooth is meshed with the first gear to drive the jaw driving rack to move forward and backward when the first gear rotates; a toothless area is provided on the side of the mating tooth away from the second driving part, and the toothless area is used to cooperate with the first gear to limit the jaw driving rack from continuing to move forward when the motor cannot stop.

8. The electric stapler according to claim 1, characterized in that: The second driving member is a second gear, and the cutting knife driving assembly includes a cutting knife, a cutting knife driving rack connected to the cutting knife, and a third gear connecting the cutting knife driving rack and the second gear. When the clutch structure drives the second gear to rotate, the second gear drives the third gear to engage with the cutting knife driving rack, so that the cutting knife driving rack pushes the cutting knife to move forward or pulls the cutting knife to move backward.

9. The electric stapler according to claim 8, characterized in that: The driving assembly also includes a circuit board housed in the main body of the electric stapler, with sensors provided at both ends of the circuit board, and a sensor sheet provided on the cutting knife driving rack. When the cutting knife driving rack pushes the cutting knife forward / backward to the end position, the sensor sheet and the corresponding sensor sense each other, causing the motor to stop rotating and the cutting knife to stop moving.

10. The electric stapler according to claim 8, characterized in that: The cutting knife driving rack is provided with meshing teeth protruding toward the third gear, and the meshing teeth are meshed with the third gear to drive the cutting knife driving rack to move forward and backward when the second gear and the third gear are meshed with each other and rotate; a toothless section is provided at one end of the meshing teeth close to the cutting knife, and the toothless section is used to cooperate with the third gear to limit the cutting knife driving rack from continuing to retreat when the motor cannot stop.

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