Electric powered endoscopic anastomosis device

Abstract

The present application relates to the field of medical devices, in particular to an electric endoscope anastomat, comprising a mounting base, a switching assembly, a locking assembly, a clutch gear and a feed rack; the switching assembly comprises at least a contact component and a first spring, wherein, along the axial direction of the clutch gear, the clutch gear is limited between the contact component and the first spring, and the contact component and the first spring are respectively used to apply force to the clutch gear; the locking assembly is arranged between the switching assembly and the mounting base, and when the clutch gear and the feed rack are in a mutually separated state, the locking assembly is used to separably lock the mounting base and the switching assembly. Under the condition of receiving external force, the locking assembly can be switched from a locked state to an unlocked state, so that the switching assembly and the mounting base are switched from a mutually locked state to a mutually separated state, and under the action of the first spring, the clutch gear moves along the direction from the lower dead point to the upper dead point, so that the clutch gear and the feed rack can be re-engaged.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to an electric laparoscopic stapler. Background Technology

[0002] In the prior art, there is a patent document entitled "An Electric Endoscopic Cutting Anastomosis Device" with application number 201811536233.8. In this patent document, a transmission gear and a rack mesh, and an eccentric wheel connected to the retracting handle controls the separation of the transmission gear and the rack. Furthermore, the hook on the eccentric wheel locks the transmission gear with the pressure plate, so that the transmission gear can no longer move relative to each other.

[0003] Because the transmission gear is locked, the electric endocavitary cutting stapler in the aforementioned patent document cannot be reused after the blade is withdrawn, and a new electric endocavitary cutting stapler must be replaced, which increases the economic cost of surgery using the stapler. The real reason why the electric endocavitary cutting stapler cannot be reused is that after the eccentric wheel and the pressure plate are jammed, the eccentric wheel cannot rotate, and thus the eccentric wheel and the pressure plate cannot be separated.

[0004] Therefore, the locked transmission gears in the existing technology have the problem of being unable to be unlocked. Summary of the Invention

[0005] To address the technical problem of locked transmission gears in existing technologies being unable to be unlocked, this invention provides an electric endoscopic stapler.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] According to one aspect of the present invention, an electric laparoscopic stapler is provided, comprising a mounting base, a switching assembly, a locking assembly, a clutch gear, and a feed rack;

[0008] The switching component, the clutch gear, and the feed rack are each configured to be movably connected to the mounting base;

[0009] The switching assembly includes at least a contact component and a first spring, wherein, along the axial direction of the clutch gear, the clutch gear is constrained between the contact component and the first spring, and the contact component and the first spring are respectively used to apply a force to the clutch gear;

[0010] The clutch gear and the feed rack have an engaged state and a disengaged state, and the clutch gear and the feed rack switch between the engaged state and the disengaged state through the switching component;

[0011] The locking component is provided between the switching component and the mounting base, wherein when the clutch gear and the feed rack are in a mutually separated state, the locking component is used to detachably lock the mounting base and the switching component.

[0012] Furthermore, the locking assembly includes a third spring, a hook portion, and an engaging portion;

[0013] The hook portion and the engaging portion can engage with each other;

[0014] The hook portion is rotatably disposed on the contact component, and the engaging portion is disposed on the mounting base;

[0015] The third spring is constrained between the touch component and the hook portion, and the hook portion and the touch component form a mutually converging motion tendency through the third spring.

[0016] Furthermore, the hook portion is provided with an active section and a driven section;

[0017] The active segment and the driven segment are configured as an integral structure at an obtuse angle, wherein the intersection of the active segment and the driven segment is hinged to the contact component, and the driven segment is provided with a first hook-shaped structure.

[0018] Along the axial direction of the clutch gear, one section of the mounting base is configured as a locating bar;

[0019] The positioning strip is provided with the engaging part, wherein the engaging part is specifically a second hook-shaped structure;

[0020] The first hook-shaped structure and the second hook-shaped structure can be interlocked.

[0021] Furthermore, the third spring is specifically a V-shaped spring sheet.

[0022] Furthermore, the touch component includes a touch segment, a first extension segment, and a second extension segment;

[0023] The first extension segment and the second extension segment are respectively connected to the touch segment along the axial direction of the clutch gear, wherein a receiving cavity is formed between the first extension segment and the second extension segment, and the receiving cavity is at least used to accommodate the overlap of the hook portion and the engaging portion;

[0024] The clutch gear is constrained between the first extension and the first spring.

[0025] Furthermore, the touch component also includes a second spring;

[0026] The second spring is constrained between the second extension and the mounting base.

[0027] Furthermore, it also includes a shift fork assembly;

[0028] The shift fork assembly is used to drive the feed rack, wherein the shift fork assembly and the feed rack have a second engagement state and a second disengagement state, and the contact component further includes a third extension section, the third extension section being used to control the shift fork assembly and the feed rack to switch between the second engagement state and the second disengagement state.

[0029] Furthermore, the shift fork assembly includes a retractable shift fork, a clutch lever, and a torsion spring;

[0030] The clutch wrench is hinged to the mounting base;

[0031] The retraction fork is eccentrically hinged to the clutch lever;

[0032] The torsion spring is hinged to the mounting base, and the two ends of the torsion spring are a head end and an end end, respectively. The head end contacts the mounting base, and the end end contacts the return fork.

[0033] The return fork and the feed rack have a second engagement state and a second disengagement state, wherein the return fork is provided with a protrusion, and the protrusion is restricted between the return fork and the second extension section;

[0034] The third extension is disposed on the second extension and is constrained between the retracting fork and the second extension;

[0035] The protrusion is located between the third extension and the torsion spring, and the protrusion contacts the third extension.

[0036] Furthermore, the feed rack is provided with at least a first toothed surface and a second toothed surface;

[0037] The first toothed surface is located on the side of the feed rack in the forward direction, and the first toothed surface and the clutch gear have the meshing state and the disengagement state;

[0038] The second toothed surface is located at the top of the feed rack in the forward direction, and the second toothed surface and the return fork have a second engagement state and a second disengagement state.

[0039] Furthermore, it also includes housing components;

[0040] The housing assembly is provided with a window;

[0041] At least the switching component, locking component, and fork component are each confined within the housing component, wherein the switching component, locking component, and fork component can be observed through the window.

[0042] The above technical solution has the following advantages or beneficial effects:

[0043] The electric laparoscopic anastomosis device provided by this invention has a clutch gear equivalent to a transmission gear in the prior art, a feed rack equivalent to a rack in the prior art, and the clutch gear and feed rack are separated from each other, equivalent to the separation of the transmission gear and rack in the prior art. The locking component is operated to a locked state, equivalent to the engagement of the hook and the pressure plate in the prior art. However, when the locking component receives an external force, it can change from the locked state to the unlocked state, so that the switching component and the mounting base change from a mutually locked state to a mutually separated state. Under the action of the first spring, the clutch gear moves along the direction from the lower dead point to the upper dead point, so that the clutch gear and the feed rack can re-engage. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of a portion of the structure of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention;

[0045] Figure 2 This is a schematic diagram of the mounting base, switching assembly, locking assembly, shift fork assembly, clutch gear, and feed rack of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0046] Figure 3 This is a schematic diagram of the switching assembly, clutch gear, and latch of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0047] Figure 4 This is a schematic diagram of the switching assembly, clutch gear, and latch of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0048] Figure 5 This is a schematic diagram of the structure of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention, including the motor, drive gear, switching assembly, locking assembly, shift fork assembly, clutch gear, and feed rack.

[0049] Figure 6 This is a schematic diagram of the mounting base, switching assembly, and locking assembly of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0050] Figure 7 This is a schematic diagram of the mounting base, switching assembly, and locking assembly of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0051] Figure 8This is a schematic diagram of the fork assembly, switching assembly, and feed rack of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0052] Figure 9 This is a schematic diagram of the mounting base, shift fork assembly, and feed rack of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0053] Figure 10 This is a schematic diagram of the window structure of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention;

[0054] Figure 11 This is a schematic diagram of the mounting base, switching assembly, and locking assembly of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention.

[0055] Figure 12 This is a schematic diagram of the mounting base, switching assembly, and locking assembly of the electric laparoscopic anastomosis device provided in Embodiment 1 of the present invention. Detailed Implementation

[0056] Example 1:

[0057] In this embodiment, an electric endoscopic stapler is provided to solve the technical problem in the prior art where the locked transmission gear cannot be unlocked.

[0058] For details, see Figures 1 to 4 The electric laparoscopic anastomosis device in this embodiment includes a mounting base 1, a switching component 2, a locking component 3, a clutch gear 4, and a feed rack 5;

[0059] The switching assembly 2, the clutch gear 4, and the feed rack 5 are respectively configured to be movably connected to the mounting base 1;

[0060] The switching assembly 2 includes at least a contact component 201 and a first spring 202, wherein the clutch gear 4 is constrained between the contact component 201 and the first spring 202 along the axial direction of the clutch gear 4, and the contact component 201 and the first spring 202 are respectively used to apply force to the clutch gear 4;

[0061] The clutch gear 4 and the feed rack 5 have an engaged state and a disengaged state, and the clutch gear 4 and the feed rack 5 switch between the engaged state and the disengaged state through the switching component 2;

[0062] A locking component 3 is provided between the switching component 2 and the mounting base 1. When the clutch gear 4 and the feed rack 5 are in a disengaged state, the locking component 3 is used to lock the separable mounting base 1 and the switching component 2.

[0063] In this embodiment, the electric laparoscopic stapler uses a motor as its main power source; for details, see [link to documentation]. Figure 5The electric laparoscopic anastomosis device is equipped with a motor 001 and a drive gear 002. The motor shaft of the motor 001 is coaxially connected to the drive gear 002, and the drive gear 002 meshes with the clutch gear 4. As the motor shaft of the motor 001 rotates, it forces the drive gear 002 and the clutch gear 4 to rotate respectively. Then, through the meshing of the clutch gear 4 with the feed rack 5, the feed rack 5 is forced to make a forward or backward movement along a straight line.

[0064] In this embodiment, when the electric laparoscopic stapler encounters a repairable malfunction, such as a motor 001 failure or battery failure during actual surgery, it is necessary to manually force the feed rack 5 to retract; for details, see [link to documentation]. Figure 5 The shift fork assembly 6 is used to force the rack to move backward. The specific structure of the shift fork assembly 6 will be described in detail later, and will not be mentioned here.

[0065] Since the power source of the shift fork assembly 6 is the force applied to the shift fork assembly 6 by the medical staff's hand, from the perspective of the feed rack 5, the feed rack 5 has two power sources. However, the feed rack 5 needs to choose one of the power sources. If the shift fork assembly 6 is to be used to force the feed rack 5 to make a backward movement, the feed rack 5 and the clutch gear 4 must be separated. Otherwise, the power of the motor 001 and the force of the medical staff's hand will act on the feed rack 5 at the same time, causing the feed rack 5 to be unable to make a backward movement.

[0066] In this embodiment, see Figure 1 or Figure 2 The switching component 2 is used to separate the feed rack 5 and the clutch gear 4 from each other. Specifically, the position where the clutch gear 4 and the feed rack 5 are engaged is defined as the top dead center, and the position where the clutch gear 4 and the feed rack 5 are separated and locked by the locking component 3 is defined as the bottom dead center. When the switching component 2 is driven by medical personnel, the switching component 2 pushes the clutch gear 4, causing the clutch gear 4 to move from the top dead center to the bottom dead center along its own axis, thereby changing the clutch gear 4 and the feed gear from the engaged state to the disengaged state.

[0067] See Figure 2 During the process of the clutch gear 4 moving from the top dead center to the bottom dead center, the clutch gear 4 is restricted between the contact part 201 of the switching component 2 and the first spring 202, so the first spring 202 is in a compressed state, which allows the first spring 202 to accumulate energy.

[0068] When the clutch gear 4 moves from the top dead center to the bottom dead center, the locking component 3 changes from the unlocked state to the locked state, so that the current locking component 3 cannot be separated from each other without the action of external force; the switching component 2 and the mounting base 1 form a separable locking state through the locked component 3; since the current switching component 2 and the mounting base 1 cannot be separated from each other, the energy stored in the first spring 202 cannot be released, and thus the clutch gear 4 cannot move along the direction from the bottom dead center to the top dead center, or in other words, the current clutch gear 4 remains stationary relative to the mounting base 1;

[0069] When the clutch gear 4 moves from the top dead center to the bottom dead center, since the current clutch gear 4 and the feed rack 5 are separated, the current feed rack 5 can only receive the force applied by the medical staff through the shift fork assembly 6. Thus, the shift fork assembly 6 can force the feed rack 5 to make a backward movement under the operation of the medical staff.

[0070] In this embodiment, the electric laparoscopic stapler that encounters a repairable fault is repaired by technicians, and after the fault is eliminated, the repaired electric laparoscopic stapler can be reused by medical staff.

[0071] If the repaired electric laparoscopic stapler needs to be put back into use, a force needs to be applied to the locking component 3 to change the locking component 3 from the locked state to the unlocked state, thereby changing the switching component 2 and the mounting base 1 from the mutually locked state to the mutually separated state.

[0072] After the switching component 2 and the mounting base 1 are separated, the energy stored in the first spring 202 is released. At least the clutch gear 4 moves along the direction from the lower dead point to the upper dead point under the action of the kinetic energy of the first spring 202, so that the clutch gear 4 meshes with the feed rack 5. Thus, the kinetic energy of the motor 001 of the repaired electric endoscopic anastomosis device is once again applied to the feed rack 5 through the drive gear 002 and the clutch gear 4. Then, under the action of the kinetic energy of the motor 001, the feed rack 5 moves forward or backward along a straight line.

[0073] It should be understood that in this embodiment, while the clutch gear 4 and the meshing rack 5 re-engage, the shift fork assembly 6 separates from the feed rack.

[0074] In the prior art (a patent document entitled "An Electric Endoscopic Cutting Anastomosis Device", application number 201811536233.8), a pressure plate is provided at the transmission gear, and a retracting handle and an eccentric wheel are provided at the rack, with a hook on the eccentric wheel; the retracting handle is used to drive the eccentric wheel to rotate, so that the hook and the pressure plate engage with each other, thereby the eccentric wheel forms a locked state relative to the frame, causing the transmission gear to be locked. However, the hook and the pressure plate form an inseparable locking structure, thus preventing the transmission gear from re-engaging with the rack.

[0075] In this embodiment, the clutch gear 4 is equivalent to the transmission gear in the prior art, and the feed rack 5 is equivalent to the rack in the prior art. The clutch gear 4 and the feed rack 5 are separated from each other, which is equivalent to the separation of the transmission gear and the rack in the prior art. The locking component is operated to the locked state, which is equivalent to the latch and the pressure plate being engaged in the prior art. However, when the locking component receives an external force, it can change from the locked state to the unlocked state, so that the switching component 2 and the mounting base 1 change from the locked state to the separated state. Under the action of the first spring 202, the clutch gear 4 moves in the direction from the lower dead point to the upper dead point, so that the clutch gear 4 and the feed rack 5 can re-engage.

[0076] Therefore, the electric endoscopic anastomosis device provided in this embodiment solves the technical problem in the prior art where the locked transmission gear cannot be unlocked.

[0077] Further, see Figure 6 or Figure 7 In this embodiment, the electric laparoscopic anastomosis device has a locking assembly 3 including a third spring 301, a hook portion 302, and a locking portion 303.

[0078] The hook part 302 and the engaging part 303 can engage with each other;

[0079] The hook portion 302 is rotatably mounted on the contact member 201, and the engaging portion 303 is mounted on the mounting base 1;

[0080] The third spring 301 is restricted between the contact member 201 and the hook portion 302, and the hook portion 302 and the contact member 201 form a mutual convergent motion tendency through the third spring 301.

[0081] The hook portion 302 is hinged to the touch component 201 of the switching component 2, thereby forming a hook portion 302 rotatably mounted on the touch component 201. Specifically, the hinge structure between the hook portion 302 and the touch component 201 can adopt a hinge structure in the prior art. For example, hinge holes are provided on the hook portion 302 and the touch component 201 respectively, and the hinge can be realized by inserting the hinge shaft into the hinge hole of the hook portion 302 and the hinge hole of the touch component 201 respectively. For example, a hinge shaft is integrated on the hook portion 302, and a hinge through hole is provided on the touch component 201. The hinge can be realized by inserting the hinge shaft on the hook portion 302 into the hinge through hole on the touch component 201.

[0082] See Figure 6 or Figure 7 The engaging part 303 is disposed on the mounting base 1, and its specific disposal method can adopt various solutions in the prior art; for example, the engaging part 303 can be disposed on the mounting base 1 by means of screws, positioning pins, adhesive bonding, etc.; in this embodiment, preferably, the engaging part 303 is directly machined on the mounting base 1.

[0083] It should be understood that the structure of the hook portion 302 itself includes at least a hook-shaped structure, and correspondingly, the structure of the engaging portion 303 includes at least a hook-shaped structure. Thus, the hook-shaped structure of the hook portion 302 and the hook-shaped structure of the engaging portion 303 can be connected to each other to realize the locking state of the locking component 3, and when the hook-shaped structure of the hook portion 302 and the hook-shaped structure of the engaging portion 303 are separated, the locking component 3 forms an unlocked state.

[0084] See Figure 6 or Figure 7 The third spring 301 is constrained between the contact member 201 and the hook portion 302 of the switching assembly 2. In this embodiment, the third spring 301 is used to apply a spring force to the contact member 201 and the hook portion 302. Under the action of the spring force of the third spring 301, at least the hook portion 302 and the contact member 201 form a mutual convergent motion tendency. In other words, the third spring 301 forces the hook portion 302 to move toward the contact member 201, so that when the hook portion 302 and the engaging portion 303 engage with each other, the force of the third spring 301 is applied to the engaging portion 303 through the hook portion 302 (see...). Figure 11 or Figure 12This allows the hook portion 302 and the engaging portion 303 to be in close contact, increasing the difficulty of disengaging the hook portion 302 and the engaging portion 303. During the actual operation of the electric laparoscopic anastomosis device of this embodiment by medical staff to perform surgery on patients, it is precisely because the hook portion 302 and the engaging portion 303 are difficult to disengage that the clutch gear 4 and the feed rack 5 remain separated during the retraction action driven by the shift fork assembly 6, thereby improving the work efficiency of medical staff.

[0085] Further, see Figure 6 , Figure 11 or Figure 12 In this embodiment, the electric laparoscopic anastomosis device has a hook portion 302 with an active section 310 and a driven section 311.

[0086] The active segment 310 and the driven segment 311 are configured as an integral structure in an obtuse angle shape. The intersection of the active segment 310 and the driven segment 311 is hinged to the contact member 201. A first hook-shaped structure 312 is provided on the driven segment 311.

[0087] Along the axial direction of the clutch gear 4, one section of the mounting base 1 is configured as a positioning bar 101;

[0088] The positioning strip 101 is provided with a locking part 303, wherein the locking part 303 is specifically a second hook-shaped structure 313;

[0089] The first hook structure 312 and the second hook structure 313 can be interlocked.

[0090] See Figure 6 or Figure 7 or Figure 11 or Figure 12 The first hook-shaped structure 312 is the hook-shaped structure of the aforementioned latching part 302; the second hook-shaped structure 313 is the hook-shaped structure of the aforementioned engaging part.

[0091] It should be understood that the hook portion 302 can only separate from the engaging portion 303 after being touched by medical personnel. In this embodiment, the active segment 310 of the hook portion 302 is used to be touched by medical personnel. Specifically, after the medical personnel's fingers touch the active segment 310 of the hook portion 302, the hook portion 302 rotates around the hinge axis with the touching component 201, so that the hook portion 302 separates from the engaging portion 303.

[0092] In this embodiment, along the direction from the top dead center to the bottom dead center of the clutch gear 4, the cross-sectional area of ​​the first hook-shaped structure 312 gradually decreases; correspondingly, along the direction from the bottom dead center to the top dead center of the clutch gear 4, the cross-sectional area of ​​the second hook-shaped structure 313 gradually decreases; at the same time, the first hook-shaped structure 312 is provided with a first inclined surface, and the second hook-shaped structure 313 is provided with a second inclined surface, with the first inclined surface and the second inclined surface facing each other.

[0093] During the movement of the hook portion 302 along the direction from the top dead center to the bottom dead center of the clutch gear 4, the first inclined surface contacts the second inclined surface. Under the action of the reaction force of the second inclined surface, the first hook structure 312 generates a tendency to move radially along the clutch gear 4. This tendency forces the hook portion 302 to rotate around the hinge point with the contact member 201, and the driving section 310 forces the third spring 301 to compress, so that the first hook structure 312 can overtake the second hook structure 313. After the first hook structure 312 overtakes the second hook structure 313, the third spring 301 releases energy, forcing the first hook structure 312 to generate a tendency to move toward the contact member 201, so that the first hook structure 312 and the second hook structure 313 form a mutually hooked state along the axial direction of the clutch gear 4.

[0094] When the first hook structure 312 and the second hook structure 313 are hooked together, if a medical staff member's finger touches the active section 310 of the hook portion 302, the hook portion 302 is forced to rotate. During this rotation, the active section 310 forces the third spring 301 to compress, causing the first hook structure 312 and the second hook structure 313 to separate radially from each other along the clutch gear 4. After separating radially from each other along the clutch gear 4, they then separate axially from each other along the clutch gear 4. At this point, at least the action of the first spring 202... Downward, the clutch gear 4, the switching component 2, and the hook part 302 move together along the direction from the lower dead point to the upper dead point of the clutch gear 4; during the movement along the direction from the lower dead point to the upper dead point of the clutch gear 4, the first hook structure 312 flips over the second hook structure 313 again, and after flipping over again, the medical staff's fingers separate from the active section 310 of the hook part 302, the third spring 301 releases energy, forcing the first hook structure 312 to move towards the touch component 201, so that the first hook structure 312 moves towards the touch component 201.

[0095] Further, see Figure 6 or Figure 7 or Figure 11 or Figure 12 In this embodiment, the third spring 301 has a V-shaped spring sheet.

[0096] Corresponding to the V-shaped spring, a positioning groove is provided on the contact component 201 of the switching component 2. A positioning protrusion 203 is provided in the positioning groove. The V-shaped spring is placed in the positioning groove and is restricted between one of the groove walls of the positioning groove and the positioning protrusion 203, thereby preventing the V-shaped spring from moving relative to the contact component 201 along the axial and radial directions of the clutch gear 4.

[0097] The specific structure of the V-shaped spring is common knowledge known to those skilled in the art, and will not be elaborated here.

[0098] The two ends of the V-shaped spring are the first end and the second end, respectively. If the first end is configured to contact the contact member 201, the second end is configured to contact the active section 310 of the hook portion 302, so that the V-shaped spring can apply elastic force to the hook portion 302.

[0099] Furthermore, in this embodiment, see... Figure 3 or Figure 4 The touch component 201 includes a touch segment 220, a first extension segment 221, and a second extension segment 222;

[0100] The first extension segment 221 and the second extension segment 222 are respectively connected to the touch segment 220 along the axial direction of the clutch gear 4, wherein a receiving cavity is formed between the first extension segment 221 and the second extension segment 222, and the receiving cavity is at least used to accommodate the overlapping part of the hook portion 302 and the engaging portion 303.

[0101] The clutch gear 4 is constrained between the first extension 221 and the first spring 202.

[0102] The touch segment 220 is used to receive kinetic energy from a person's hand, thereby making a movement along the direction from the top dead center to the bottom dead center of the clutch gear 4.

[0103] The first extension segment 221 and the second extension segment 222 are respectively connected to the touch segment 220, so that when the touch segment 220 moves along the direction from the top dead center to the bottom dead center of the clutch gear 4, the first extension segment 221 and the second extension segment 222 move along the direction from the top dead center to the bottom dead center of the clutch gear 4.

[0104] A clutch gear 4 is provided between the first extension section 221 and the first spring 202. When the first extension section 221 moves along the direction from the top dead center to the bottom dead center of the clutch gear 4, the first extension section 221 is used to push the clutch gear 4 to move along its direction from the top dead center to the bottom dead center. At the same time, the first spring 202 is compressed under the joint push of the first extension section 221 and the clutch gear 4.

[0105] As mentioned in the aforementioned scheme, the hook portion 302 is rotatably mounted on the touch component 201. Assuming that the hook portion 302 is located on the side of the touch component 201, the center of gravity of the touch component 201 itself will tend to the hook portion 302. As a result, when the touch component 201 is pressed, the touch component 201 is prone to tilting, causing the movement path of the touch component 201 to intersect with the axial direction of the clutch gear 4. This increases the friction between the touch component 201 and at least the mounting base 1, causing medical staff to feel a jamming when the touch component 201 is pressed.

[0106] Therefore, the use of a first extension segment 221 and a second extension segment 222, with a receiving cavity between the first extension segment 221 and the second extension segment 222, aims to at least restrict the center of gravity of the touch component 201 between the first extension segment 221 and the second extension segment 222, or to restrict the center of gravity of the touch component 201 near the vertical line of the center of the touch component 201. As a result, the touch component 201 is less likely to tilt during the pressing process, avoiding an increase in friction between the touch component 201 and the mounting base 1, so that medical staff can hardly feel any jamming during the pressing of the touch component 201.

[0107] Furthermore, in this embodiment, see... Figure 2 or Figure 3 The contact component 201 also includes a second spring 204;

[0108] The second spring 204 is constrained between the second extension 222 and the mounting base 1.

[0109] The main function of the second spring 204 is to drive the contact component 201 along the direction from the lower dead center to the upper dead center of the clutch gear 4. As mentioned above, the use of the first extension section 221 and the second extension section 222 makes it less likely for the contact component 201 to tilt during the pressing process (i.e., the movement along the direction from the upper dead center to the lower dead center of the clutch gear 4). However, if only the first spring 202 is used as the power source, when the first spring 202 drives the clutch gear 4 and the contact component 201, it is easy for the contact component 201 to tilt when it moves along the direction from the lower dead center to the upper dead center of the clutch gear 4, thereby increasing the friction between the contact component 201 and the mounting base 1.

[0110] Therefore, by using the first spring 202 to drive the clutch gear 4 and the first extension 221, and by using the second spring 204 to drive the second extension 222, the contact component 201 is actually subjected to the force of the first spring 202 and the force of the second spring 204 during its movement along the lower dead center to the upper dead center of the clutch gear 4. This keeps the center of gravity of the contact component 201 between the first extension 221 and the second extension 222, making it less likely for the contact component 201 to tilt and preventing an increase in friction between the contact component 201 and the mounting base 1.

[0111] In this embodiment, the first spring 202 and the second spring 204 are preferably helical springs; based on this, it is preferable to use two locating pins to limit the positions of the first spring 202 and the second spring 204, specifically:

[0112] The mounting base 1 is provided with a first positioning through hole, a second positioning through hole and a third positioning through hole. Correspondingly, the first extension 221 of the touch component 201 is provided with a fourth positioning through hole, and the second extension 222 of the touch component 201 is provided with a fifth positioning through hole.

[0113] The first positioning through hole and the second positioning through hole are provided at the first extension section 221, and the first extension section 221 is located between the first positioning through hole and the second positioning through hole. The fourth positioning through hole on the first extension section 221 is coaxially arranged with the first positioning through hole and the second positioning through hole respectively. The first positioning pin is used to penetrate the first positioning through hole, the fourth positioning through hole and the second positioning through hole respectively, so that the first positioning pin is interference fit with the first positioning through hole and the second positioning through hole respectively, and the first positioning pin is clearance fit with the fourth positioning through hole. The first spring 202 and the clutch gear 4 are respectively sleeved on the first positioning pin.

[0114] The third positioning through hole is set at the second extension section 222. The third positioning through hole and the fifth positioning through hole of the second extension section 222 are coaxially arranged. The second positioning pin penetrates the third positioning through hole and the fifth positioning through hole respectively, so that the second positioning pin is interference fit with the third positioning through hole and the second positioning pin is clearance fit with the fifth positioning through hole. The second spring 204 is sleeved on the second positioning pin.

[0115] Further, see Figure 1 , Figure 2 , Figure 5 , Figure 8 or Figure 9 The electric laparoscopic anastomosis device in this embodiment also includes a fork assembly 6;

[0116] The shift fork assembly 6 is used to drive the feed rack 5, wherein the shift fork assembly 6 and the feed rack 5 have a second engagement state and a second disengagement state, and the contact member 201 further includes a third extension 223, which is used to control the shift fork assembly 6 and the feed rack 5 to switch between the second engagement state and the second disengagement state.

[0117] Before the switching component 2 is pressed, that is, when the clutch gear 4 and the feed rack 5 are engaged, the third extension 223 of the contact component 201 is used to form a second disengagement state between the shift fork assembly 6 and the feed rack 5, so that the current power source of the feed rack 5 is limited to the motor 001.

[0118] After the switching component 2 is pressed, that is, when the clutch gear 4 and the feed rack 5 are separated, the third extension 223 of the contact component 201 is used to form a second engagement state between the shift fork assembly 6 and the feed rack 5, so that the current power source of the feed rack 5 is limited to the shift fork assembly 6.

[0119] When the shift fork assembly 6 and the feed rack 5 are in the second engagement state, medical staff can move the shift fork assembly 6 to make the feed rack 5 move backward in a straight line.

[0120] After the medical staff operates the locking component to re-engage the clutch gear 4 with the feed rack 5, the third extension 223 of the contact component 201 re-separates the shift fork assembly 6 from the feed rack 5 into a second disengagement state.

[0121] For details, see Figure 8 or Figure 9 In this embodiment, the electric laparoscopic anastomosis device includes a fork assembly 6 comprising a retractable fork 601, a clutch wrench 602, and a torsion spring 603.

[0122] Clutch wrench 602 is hinged to mounting base 1;

[0123] The return fork 601 is eccentrically hinged to the clutch wrench 602;

[0124] The torsion spring 603 is hinged to the mounting base 1. The two ends of the torsion spring 603 are the head end and the end end, respectively. The head end contacts the mounting base 1, and the end end contacts the return fork 601.

[0125] The return fork 601 and the feed rack 5 have a second engagement state and a second disengagement state, wherein the return fork 601 is provided with a protrusion 604, and the protrusion 604 is restricted between the return fork 601 and the second extension 222.

[0126] The touch component 201 also includes a third extension 223 (see Figure 4 or Figure 8The third extension 223 is disposed on the second extension 222 and is restricted between the retracting fork 601 and the second extension 222.

[0127] The protrusion 604 is located between the third extension 223 and the torsion spring 603, and the protrusion 604 contacts the third extension 223.

[0128] The structure of the return fork 601 itself can adopt the structure of the return fork 601 in the prior art, the structure of the clutch wrench 602 itself can adopt the structure of the clutch wrench 602 in the prior art, and the structure of the torsion spring 603 is common knowledge known to those skilled in the art, and will not be described in detail here.

[0129] The clutch wrench 602 is mounted on the mounting base 1 via a first pin, allowing the clutch wrench 602 to rotate around the pin. The return fork 601 is mounted on the clutch wrench 602 via a second pin. Specifically, the second pin and the first pin are eccentrically connected, and the first pin is located between the torsion spring 603 and the second pin. When the clutch wrench 602 is moved along the direction from the torsion spring 603 to the second pin, the second pin drives the return fork 601, which in turn drives the feed rack 5, thereby realizing the backward movement of the feed rack 5 along a straight line.

[0130] The function of the torsion spring 603 is to force the return fork 601 and the feed rack 5 to form a second engagement state. Specifically, when the clutch gear 4 and the feed rack 5 are engaged, the third extension 223 separates the return fork 601 and the feed rack 5 through the protrusion 604 on the return fork 601. More specifically, along the direction from the lower dead center to the upper dead center of the clutch gear 4, the third extension 223 applies a separation force to the protrusion 604. This separation force causes the return fork 601 and the feed rack 5 to separate. At the same time, the torsion spring 603 is compressed and stores energy. Conversely, when the clutch gear 4 and the feed rack 5 are engaged, the third extension 223 moves along the direction from the upper dead center to the lower dead center of the clutch gear 4, which reduces the separation force applied by the third extension 223 to the protrusion 604. At this time, the torsion spring 603 releases energy, forcing the return fork 601 and the feed rack 5 to form a second engagement state.

[0131] When the return fork 601 and the feed rack 5 are in the second engagement state, if the clutch wrench 602 is moved along the direction from the torsion spring 603 to the second pin, the torsion spring 603 forces the return fork 601 to always maintain the second engagement state with the feed rack 5. Alternatively, if the clutch wrench 602 is moved along the direction from the second pin to the torsion spring 603, under the action of the torsion spring 603, the return fork 601 moves over the adjacent tooth peaks on the feed rack 5 in an undulating state. More specifically, the return fork 601 first moves from the first tooth valley to the first tooth peak. At this time, the torsion spring 603 is further compressed. Then, the return fork 601 moves over the first tooth peak, and the torsion spring 603 releases energy, causing the return fork 601 to move to the second tooth valley, thus causing the return fork 601 to move over the tooth peak in an undulating state.

[0132] Further, see Figure 1 In this embodiment, the electric laparoscopic anastomosis device has a feed rack 5 with at least a first toothed surface 501 and a second toothed surface 502.

[0133] The first tooth surface 501 is located on the side of the feed rack 5 in the forward direction, and the first tooth surface 501 has a meshing state and a disengaged state with the clutch gear 4.

[0134] The second toothed surface 502 is located at the top of the feed rack 5 in the forward direction, and the second toothed surface 502 has a second engagement state and a second disengagement state with the return fork 601.

[0135] Further, see Figure 1 or Figure 10 The electric laparoscopic stapler in this embodiment also includes a housing assembly 7;

[0136] The housing assembly 7 is provided with a window 701;

[0137] At least the switching component 2, the locking component 3, and the fork component 6 are each confined inside the housing component 7, wherein the switching component 2, the locking component 3, and the fork component 6 can be observed through window 701.

[0138] In the electric laparoscopic stapler of this embodiment, a closable cover is provided at the window 701 on the housing assembly 7. When the cover is closed on the window 701, the aforementioned switching assembly 2 and fork assembly 6 are located in the space between the housing and the cover and cannot be seen by a person's line of sight. When the cover is separated from the housing assembly 7, a person's line of sight can see the switching assembly 2, the locking assembly 3 and the fork assembly 6 through the window 701, and a person's fingers can press the switching assembly 2, push the locking assembly 3 and push the fork assembly 6.

[0139] Example 2:

[0140] Based on the aforementioned Embodiment 1, the electric laparoscopic stapler in this embodiment has some changes to the locking component 3, specifically:

[0141] The locking assembly 3 also includes a third spring 301, a hook portion 302, and an engaging portion 303;

[0142] The hook portion 302 and the engaging portion 303 are configured to engage separably.

[0143] The hook portion 302 is rotatably mounted on the mounting base 1, and the engaging portion 303 is mounted on the contact member 201.

[0144] The third spring 301 is restricted between the mounting base 1 and the hook portion 302, and the hook portion 302 and the mounting base 1 form a mutual convergent motion tendency through the third spring 301.

[0145] The locking component 3 in this embodiment has the same function as the locking component 3 in the aforementioned embodiment 1, and will not be repeated here; the difference is that the positions of the hook portion 302 and the engaging portion 303 in this embodiment are different from those in the aforementioned embodiment 1.

[0146] Example 3:

[0147] Based on the aforementioned Embodiment 1, the electric laparoscopic stapler in this embodiment has made some changes to the structure and connection method of the third spring 301 of the locking assembly, specifically:

[0148] In this embodiment, a torsion spring is used as the third spring 301; the difference is that a detachable pin is provided on the contact component 201 for mounting the torsion spring, so that the torsion spring is hinged to the contact component 201 through the pin, and the two ends of the torsion spring contact the contact component 201 and the engaging part 303 respectively.

[0149] The function of the torsion spring is the same as that of the V-shaped spring in the aforementioned embodiment 1, and will not be repeated here.

[0150] Example 4:

[0151] Based on the aforementioned Embodiment 1, this embodiment provides an electric laparoscopic stapler with another locking structure, specifically:

[0152] The hook part 302 and the engaging part 303 in the aforementioned embodiment 1 are discarded. Instead of the hook part 302, a button with a retractable sleeve structure is used. Instead of the engaging part 303, a sliding groove is provided on the housing assembly 7.

[0153] The sleeve structure button has a connecting seat, a cylinder, a positioning rod, and a helical spring. The connecting seat and the cylinder are integrated into one structure, so that the cylinder is connected to the switching component 2 in embodiment 1 through the connecting seat. The helical spring is disposed in the cylinder. The two ends of the positioning rod are a head end and a tail end, respectively. The tail end is inserted into the cylinder so that the helical spring can apply elastic force to the positioning rod. The head end is configured as a first rod body and a second rod body. The second rod body is located between the first rod body and the tail end. The cross-sectional area of ​​the second rod body is larger than the cross-sectional area of ​​the first rod body.

[0154] The sliding groove on the housing assembly 7 is provided with a straight first groove and a second groove whose shape matches the second rod body;

[0155] When the clutch gear 4 and the feed rack 5 are engaged, the first rod of the sleeve structure button is confined within the first groove, while the second rod of the button is confined between the housing assembly 7 and the switching assembly 2.

[0156] When the switching component 2 is pressed, causing the clutch gear 4 to move from the upper dead point to the lower dead point, the first rod-shaped part slides along the direction from the first groove-shaped part to the second groove-shaped part;

[0157] When the clutch gear 4 moves to the bottom dead center, the clutch gear 4 and the feed rack 5 separate from each other. At this time, the second rod-shaped part is inserted into or locked into the contour of the second groove-shaped part under the elastic force of the helical spring, thereby forming the locking state of the locking assembly. At the same time, the first rod-shaped part protrudes from the inside of the first groove-shaped part to the outside of the first groove-shaped part, and its protruding direction is in the same direction as the elastic force of the helical spring.

[0158] After the first rod-shaped part protrudes outside the first groove-shaped part, the medical staff presses the first rod-shaped part with their fingers, causing the first rod-shaped part to return to the first groove-shaped part, and the second rod-shaped part to return to the space between the housing assembly 7 and the switching assembly 2. That is, the second rod-shaped part disengages from the second groove-shaped part. Thus, under the elastic force of the first spring 202 and the second spring 204 of the switching assembly 2, it can move along the direction from the lower dead point to the upper dead point of the clutch gear 4 until the clutch gear 4 re-engages with the feed rack 5.

[0159] It should be understood that, in this embodiment, since the mounting base 1 is fixed relative to the housing assembly 7, the locking assembly has already indirectly locked the switching assembly 2 and the mounting base 1 when the second rod-shaped part of the button in the sleeve structure is inserted into the second groove-shaped part.

[0160] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An electric laparoscopic stapler, characterized in that, Includes mounting base, switching assembly, locking assembly, clutch gear and feed rack; The switching component, the clutch gear, and the feed rack are each configured to be movably connected to the mounting base; The switching assembly includes at least a contact component and a first spring, wherein, along the axial direction of the clutch gear, the clutch gear is constrained between the contact component and the first spring, and the contact component and the first spring are respectively used to apply a force to the clutch gear; The clutch gear and the feed rack have an engaged state and a disengaged state, and the clutch gear and the feed rack switch between the engaged state and the disengaged state through the switching component; The locking component is provided between the switching component and the mounting base, wherein when the clutch gear and the feed rack are in a mutually separated state, the locking component is used to detachably lock the mounting base and the switching component; The locking assembly includes a third spring, a hook portion, and a locking portion; The hook portion and the engaging portion can engage with each other; The hook portion is rotatably disposed on the contact component, and the engaging portion is disposed on the mounting base; The third spring is constrained between the contact component and the hook portion, and the hook portion and the contact component form a mutually converging motion tendency through the third spring; The touch component includes a touch segment, a first extension segment, and a second extension segment; The first extension segment and the second extension segment are respectively connected to the touch segment along the axial direction of the clutch gear, wherein a receiving cavity is formed between the first extension segment and the second extension segment, and the receiving cavity is at least used to accommodate the overlap of the hook portion and the engaging portion; The clutch gear is constrained between the first extension and the first spring.

2. The electric laparoscopic stapler according to claim 1, characterized in that, The hook portion is provided with an active section and a driven section; The active segment and the driven segment are configured as an integral structure at an obtuse angle, wherein the intersection of the active segment and the driven segment is hinged to the contact component, and the driven segment is provided with a first hook-shaped structure; Along the axial direction of the clutch gear, one section of the mounting base is configured as a locating bar; The positioning strip is provided with the engaging part, wherein the engaging part is specifically a second hook-shaped structure; The first hook-shaped structure and the second hook-shaped structure can be interlocked.

3. The electric laparoscopic stapler according to claim 1, characterized in that, The third spring is specifically a V-shaped spring sheet.

4. The electric laparoscopic stapler according to claim 1, characterized in that, The contact component also includes a second spring; The second spring is constrained between the second extension and the mounting base.

5. The electric laparoscopic stapler according to claim 1, characterized in that, It also includes the shift fork assembly; The shift fork assembly is used to drive the feed rack, wherein the shift fork assembly and the feed rack have a second engagement state and a second disengagement state, and the contact component further includes a third extension section, the third extension section being used to control the shift fork assembly and the feed rack to switch between the second engagement state and the second disengagement state.

6. The electric laparoscopic stapler according to claim 5, characterized in that, The shift fork assembly includes a return shift fork, a clutch lever, and a torsion spring; The clutch wrench is hinged to the mounting base; The retraction fork is eccentrically hinged to the clutch lever; The torsion spring is hinged to the mounting base, and the two ends of the torsion spring are a head end and an end end, respectively. The head end contacts the mounting base, and the end end contacts the return fork. The return fork and the feed rack have a second engagement state and a second disengagement state, wherein the return fork is provided with a protrusion, and the protrusion is restricted between the return fork and the second extension section; The third extension is disposed on the second extension and is constrained between the retracting fork and the second extension; The protrusion is located between the third extension and the torsion spring, and the protrusion contacts the third extension.

7. The electric laparoscopic stapler according to claim 6, characterized in that, The feed rack is provided with at least a first toothed surface and a second toothed surface; The first toothed surface is located on the side of the feed rack in the forward direction, and the first toothed surface and the clutch gear have the meshing state and the disengagement state; The second toothed surface is located at the top of the feed rack in the forward direction, and the second toothed surface and the return fork have a second engagement state and a second disengagement state.

8. The electric laparoscopic stapler according to claim 5, characterized in that, It also includes housing components; The housing assembly is provided with a window; At least the switching component, locking component, and fork component are each confined within the housing component, wherein the switching component, locking component, and fork component can be observed through the window.

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