Electric anastomat

Abstract

The invention relates to the field of medical instruments, and aims to provide an electric anastomat which comprises an anastomat body, an outer sheath, a driver and a transmission mechanism, the outer sheath is arranged on the front side of the anastomat body, the driver is slidably connected to the inner side of the outer sheath, a slot is formed in the bottom end of a holding part of the anastomat body, and the transmission mechanism is arranged in the slot. A multiplexing handle is detachably connected in the slot, a transmission shaft sleeve is arranged at the top end of the multiplexing handle, and a driving assembly used for driving the transmission shaft sleeve to rotate is arranged in the multiplexing handle; the transmission mechanism comprises a rotating arm, a straight push rod and a threaded transmission shaft; the straight push rod is in threaded connection with a threaded transmission shaft, and the bottom of the threaded transmission shaft is provided with an insertion shaft matched with the transmission shaft sleeve in an insertion mode. According to the invention, the stability and safety of the electric anastomat in the percussion process can be ensured, and the electric anastomat can be reused without cleaning the electric handle.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to an electric stapler. Background Art

[0002] Minimally invasive surgery achieves the same good results as open surgery with minimal or no damage to the patient's internal environment (local or systemic) with minimal or no damage. As a minimally invasive surgical instrument, electric staplers are often used for cutting and suturing tissues in some surgical operations.

[0003] The existing electric staplers are mainly used to fire by converting the motor's rotational motion into the desired motion through the transmission mechanism, so as to achieve the cutting and closing of tissues by the stapler assembly. Since the tissue thickness of different patients is different, the requirements for firing force are also different. However, if the transmission efficiency of the transmission mechanism is low or the motor output power is insufficient, it is easy to cause the instrument to fail to staple or cut tissue, and the operation cannot be guaranteed to go smoothly.

[0004] Existing electric staplers are divided into disposable staplers and reusable staplers. The difference between the two lies in whether the electric handle is reusable. After a single stapler operation, the body, working head and electric handle of a disposable electric stapler are all scrapped to avoid cross-infection and other hidden dangers. However, disposable staplers contain motors and battery packs. Scrapping too many electric handles not only increases the production cost of the enterprise, but also increases the procurement cost of the equipment for medical institutions.

[0005] As for the existing reusable staplers, most of them are composed of a disposable working head and a reusable electric handle. After one operation, only the working head is scrapped. Although the electric handle can be used for the next operation, it needs to be cleaned and sterilized in a tedious way. In order to avoid cleaning and sterilization, a sterile barrier cover of the electric handle needs to be used during the operation. However, the electric handle with the sterile barrier cover becomes larger, resulting in poor operation of the operator.

[0006] In summary, the existing electric firing staplers have the following defects:

[0007] 1. The transmission mechanism of a conventional electric stapler is mainly composed of multiple transmission rods. Friction, transmission gap and interference movement between the rods will occur between the rods. Therefore, in the transmission mechanism, the more transmission rods there are, the lower the transmission efficiency. Secondly, the transmission mechanism of a conventional electric stapler usually controls the movement of the transmission rod by driving the cam to rotate through a motor. The transmission rod then transmits the force to the driver of the stapler assembly. The precision and hardness of the cam determine the movement stability of the transmission rod. Therefore, the production requirements for the cam are extremely high, which also increases the production cost.

[0008] 2. The current repetitive use of electric handles requires cleaning and sterilization after each operation. The cleaning and sterilization steps are cumbersome and time-consuming. In addition, during high-temperature sterilization, the circuit board, motor and its internal components are easily affected by high temperatures, which aggravates the aging of the motor or components and shortens the service life of the device. Summary of the invention

[0009] The object of the present invention is to provide an electric stapler, which can ensure that the electric stapler has stability and safety during the firing process and can be reused without cleaning the electric handle.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] An electric stapler comprises a stapler body, an outer sheath, a driver and a transmission mechanism, wherein the outer sheath is arranged at the front side of the stapler body, the driver is slidably connected to the inner side of the outer sheath, a slot is provided at the bottom end of a holding portion of the stapler body, a reusable handle is detachably connected in the slot, a transmission shaft sleeve is provided at the top end of the reusable handle, and a driving assembly for driving the transmission shaft sleeve to rotate is provided in the reusable handle;

[0012] The transmission mechanism comprises a rotating arm, a straight push rod and a threaded transmission shaft; the straight push rod is threadedly connected to the threaded transmission shaft, and a plug-in shaft which is plugged and matched with a transmission shaft sleeve is provided at the bottom of the threaded transmission shaft.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] 1. A firing sensing device is provided on the transmission mechanism, which eliminates the influence of transmission errors between the rods by controlling the movement stroke of the rods, ensures that the driver moves to the set stroke, and avoids safety hazards such as incomplete tissue cutting; in addition, the connecting shaft that cooperates with the driver is connected with the long groove on the rotating arm through the shaft groove, and its structure is simple and the transmission efficiency is high. When the rotating arm drives the driver to move, the force direction of the driver is almost consistent and the force is stable.

[0015] 2. Through the coordination of the protective cover, the slot and the reusable handle, the reusable handle is placed in a closed space during use, thus avoiding contamination from blood or other biological materials. It can be reused without cleaning and sterilization, which improves the convenience of using the device, reduces the workload of subsequent medical treatment, and reduces the cost of use.

[0016] 3. By setting the transmission teeth and transmission parts, the plug-in shaft and the transmission sleeve can be plugged in any state, and the transmission parts and the transmission teeth can cooperate for transmission, thereby realizing the rapid assembly of the reusable handle and reducing the surgical preparation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a first embodiment of an electric stapler of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the threaded transmission shaft of the present invention;

[0019] Figure 3 It is a schematic diagram of the insertion of the splicing shaft into the transmission sleeve of the present invention;

[0020] Figure 4 It is a schematic diagram of inserting a plug-in shaft into a transmission sleeve in a second embodiment of an electric stapler of the present invention;

[0021] Figure 5 It is a simplified structural diagram of the multiplexed handle of the present invention;

[0022] Figure 6 It is a schematic diagram of the assembly of the driver, the rotating arm, the straight push rod and the threaded transmission shaft of the present invention;

[0023] Figure 7 It is a schematic diagram of the coordination relationship between the firing sensing unit A and the starting state sensing block A and the ending state sensing block A;

[0024] Figure 8 Schematic diagram of the coordination relationship between the firing sensing device B and the firing sensing device C;

[0025] Fig. 9 It is a schematic diagram of the coordination relationship between the starting state sensing block B and the ending state sensing block C.

[0026] Explanation of reference numerals: 1 anastomosis device body, 2 external sheath, 3 driver, 3-1 connecting shaft, 3-2 end state sensing block C, 4 rotating arm, 4-1 long slot, 4-2 complementary notch, 4-3 fixing pin, 4-4 starting state sensing block A, 4-5 end state sensing block A, 5 straight push rod, 5-1 integrated pin, 5-2 starting state sensing block B, 6 threaded transmission shaft, 7 firing sensing unit A, 8 firing sensing device B, 9 firing sensing device C, 200 reusable handle, 210 transmission shaft sleeve, 211 transmission tooth, 212 internal spline, 220 power plug, 400 driving assembly, 500 protective cover, 600 plug-in shaft, 602 limiting flange, 610 fixing shaft, 620 plug-in sheet, 630 external spline. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0028] like Figure 1-4 and Figure 7-9 FIG. 1 is a schematic diagram of an embodiment 1 of an electric stapler provided by the present invention:

[0029] Embodiment 1: An electric stapler comprises a stapler body 1, an outer sheath 2, a driver 3 and a transmission mechanism, wherein the outer sheath 2 is arranged on the front side of the stapler body 1, and the driver 3 is slidably connected to the inner side of the outer sheath 2; it should be noted that the outer sheath 2 limits the driver 3 to move only along a first axis.

[0030] The bottom end of the holding portion of the stapler body 1 is provided with a slot, in which a reusable handle 200 is detachably connected, and a transmission sleeve 210 is provided at the top of the reusable handle 200, and a driving assembly 400 for driving the transmission sleeve 210 to rotate is provided in the reusable handle 200;

[0031] The transmission mechanism includes a rotating arm 4, a straight push rod 5 and a threaded transmission shaft 6; the straight push rod 5 is threadedly connected to the threaded transmission shaft 6, and the bottom of the threaded transmission shaft 6 is provided with a plug-in shaft 600 that is plugged into the transmission sleeve 210.

[0032] A limiting flange 602 is provided between the threaded transmission shaft 6 and the plug-in shaft 600, and a protective cover 500 is hingedly connected to the anastomosis body 1 and can be covered with or separated from the bottom of the slot.

[0033] After the protective cover 500 covers the slot, a closed space is formed in the slot, and during surgery, blood or other biological materials cannot contaminate the reusable handle 200 in the slot. Therefore, after the reusable handle 200 is pushed into the slot and the protective cover 500 is buckled, the gripping portion of the stapler body 1 can act as a sterile barrier protective cover to protect the reusable handle 200, ensuring that the reusable handle 200 is not contaminated after surgery, and can be used for the next surgery without cleaning and sterilization.

[0034] A plurality of transmission teeth 211 are disposed on the inner wall of the transmission sleeve 210 , and a transmission member cooperating with the transmission teeth 211 is disposed on the plug-in shaft 600 .

[0035] An odd number of the transmission teeth 211 are provided, and the transmission teeth 211 are arranged in a ring-like shape with equal spacing;

[0036] Alternatively, an even number of the transmission teeth 211 are provided, and the transmission teeth 211 are arranged in a staggered manner in a ring shape (the transmission teeth 211 are not located at both ends of the circle diameter);

[0037] The side wall of the plug-in shaft 600 is provided with a through slot passing through the center. The transmission member includes a fixed shaft 610 arranged on the opposite side of the through slot and a plug-in piece 620 rotatably sleeved on the fixed shaft 610. At least one side of the plug-in piece 620 extends out of the through slot and cooperates with the side limit of the transmission tooth 211.

[0038] Specifically, in certain embodiments where an odd number of transmission teeth 211 are provided and the transmission teeth 211 are arranged in a circular shape with equal spacing, when the plug-in shaft 600 is plugged into the transmission sleeve 210, the plug-in sheet 620 will have two states:

[0039] In state 1, when the plug shaft 600 and the transmission sleeve 210 are plugged into each other, the plug piece 620 overlaps with the transmission tooth 211 in the axial direction of the plug shaft 600, and as the plug shaft 600 is gradually inserted into the transmission sleeve 210, since the plug piece 620 is rotatably sleeved on the fixed shaft 610, when the plug piece 620 contacts the transmission tooth 211, the transmission tooth 211 applies a reaction force to the plug piece 620, so that the plug piece 620 rotates around the fixed shaft 610 in the through It swings to the opposite side in the groove, and because the transmission teeth 211 are arranged in a circular shape and at equal intervals, the plug-in piece 620 does not interfere with the transmission teeth 211 after swinging to the opposite side. It should be noted that when the number of transmission teeth 211 is at least three, the distance between any two adjacent transmission teeth 211 is sufficient to accommodate the plug-in piece 620; then, the driving assembly 400 drives the transmission sleeve 210 to rotate, and the plug-in piece 620 cooperates with the side limit of the transmission tooth 211.

[0040] In state two, when the plug-in shaft 600 is plugged into the transmission sleeve 210, the plug-in piece 620 does not overlap with the transmission tooth 211 in the axial direction. At this time, the plug-in piece 620 can be inserted into the transmission sleeve 210 without hindrance, and the transmission sleeve 210 is driven to rotate with the driving assembly 400. At least one side of the plug-in piece 620 is limitedly matched with the side of the transmission tooth 211.

[0041] Specifically, in certain embodiments where an even number of transmission teeth 211 are provided and each transmission tooth 211 is arranged in a staggered manner in a ring shape, the purpose of the staggered arrangement of the transmission teeth 211 in a ring shape is still to ensure that the plug-in shaft 600 can be inserted into the transmission sleeve 210 without hindrance without aligning the transmission sleeve 210, and the transmission sleeve 210 is driven by the drive assembly 400 to cooperate with the side limit of the transmission tooth 211.

[0042] Preferably, there are three transmission teeth 211 .

[0043] The driving assembly 400 includes a motor and a power supply electrically connected to the motor, and the output end of the motor is connected to the bottom of the transmission sleeve 210;

[0044] The reusable handle 200 is provided with a power plug 220 electrically connected to the power supply, and the stapler body 1 is also provided with a display screen, a sensor and a buzzer electrically connected to the power plug 220 .

[0045] A connecting shaft 3-1 is provided at the rear of the driver 3, and the middle part of the rotating arm 4 is rotatably connected to the anastomosis body 1, so that the rotating arm 4 can rotate around a second axis, and the second axis is not parallel to the first axis; a vertically extending long groove 4-1 is provided at the front of the rotating arm 4, and the connecting shaft 3-1 is slidably connected in the long groove 4-1, and a complementary recess 4-2 is provided at the rear bottom end of the rotating arm 4, and the straight push rod 5 is threadedly connected to the threaded transmission shaft 6, and the straight push rod 5 is provided with an integrated pin 5-1 that cooperates with the complementary recess 4-2.

[0046] Furthermore, the rotating arm 4 is provided with a fixing pin 4 - 3 , and the fixing pin 4 - 3 is rotatably connected to the anastomosis device body 1 .

[0047] Since the connecting shaft 3-1 is tangentially matched with the plane of the long slot 4-1, when the rotating arm 4 rotates around the second axis, the rotating arm 4 and the connecting shaft 3-1 come into conflict, driving the connecting shaft 3-1 and the driver 3 to translate along the first axis.

[0048] The electric stapler also includes a firing sensing unit A7 arranged in the stapler body 1, and a starting state sensing block A4-4 and a terminal state sensing block A4-5 are provided on the rotating arm 4. Before the rotating arm 4 is fired, the starting state sensing block A4-4 is located at the sensing position of the firing sensing unit A7; after the rotating arm 4 is fired into place, the terminal state sensing block A4-5 rotates to the sensing position of the firing sensing unit A7.

[0049] When the starting state sensing block A4-4 or the ending state sensing block A4-5 moves to the set position and is detected by the firing sensing unit A7, a signal can be output to control the working state of the motor switch.

[0050] The electric stapler further comprises a firing sensing device B8 arranged at the holding portion of the stapler body 1 and a firing sensing device C9 arranged at the outer sheath 2;

[0051] The straight push rod 5 is provided with a starting state sensing block B5-2, which is located at the sensing position of the firing sensing device B8 before firing;

[0052] The driver 3 is provided with a termination state sensing block C3 - 2 , which moves to the sensing position of the firing sensing device C9 after the firing is completed.

[0053] When the starting state sensing block B5-2 is at the firing sensing device B8 position, the sensing device senses that the straight push rod 5 is at the starting state position and transmits a signal to the control circuit, and then the motor can be controlled to perform the firing operation. During the firing process, when the terminal state sensing block C3-2 moves to the firing sensing device C9 position, the sensing device senses that the driver 3 is at the terminal state position and transmits a signal to the control circuit, the line of the drive motor is cut off, and the driver 3 stops moving. The purpose of this design is to eliminate the influence of the transmission error between the rods and ensure that the driver 3 moves and retreats according to the set stroke during the entire firing process.

[0054] It should be pointed out that in addition to the above-listed sensing position settings, the sensing position can also be set at different locations of the moving component, or a mechanical button structure can be used to limit the positions of the starting state and the ending state. The principles are obvious.

[0055] During firing, when the firing sensing device B8 senses that the straight push rod 5 is in the starting state, the motor drives the straight push rod 5 to move along the third axis. When the straight push rod 5 is in the advancing state, the integrated pin 5-1 thereon contacts the complementary notch 4-2 on the rotating arm 4, and the integrated pin 5-1 pushes the rotating arm 4 to rotate around the second axis. When the rotating arm 4 is in the rotating state, the long groove 4-1 thereon contacts the connecting shaft 3-1 of the driver 3, driving the driver 3 to move along the first axis. When the firing sensing device C9 senses that the driver 3 moves to the terminal state, the motor stops rotating, the driver stops moving, and the cutting and suturing of the tissue are completed. At this time, a pressure holding program can be set, and the knife is automatically retracted after the pressure holding is completed, and the motor drives the straight push rod 5 to retreat along the third axis. At this time, the integrated pin 5-1 on the straight push rod 5 cooperates with the complementary notch 4-2 on the rotating arm 4, so that the rotating arm 4 generates a rotational motion around the second axis, and the rotating arm 4 drives the driver 3 to retreat along the first axis. When the firing sensing device B8 senses that the straight push rod 5 has retreated to the initial state, the motor stops rotating, the driver 3 stops retreating, and the knife is retracted. Thus, the whole firing process is completed.

[0056] Embodiment 2: An electric stapler

[0057] like Figure 4 As shown, the basic structure of the second embodiment is generally similar to that of the first embodiment, and the difference from the first embodiment is that the transmission member is an external spline 630 arranged on the outer peripheral wall of the plug-in shaft 600, and the inner wall of the transmission sleeve 210 is provided with an internal spline 212 matching the external spline.

[0058] Furthermore, the upper end of the key teeth of the internal spline 212 is provided with a guide surface for guiding the external spline 630 to engage therewith, and the lower end of the key teeth of the external spline 630 is provided with a wedge surface matching the guide surface.

[0059] In some embodiments, the transmission member is an internal spline provided on the outer peripheral wall of the plug-in shaft 600, and the inner wall of the transmission sleeve 210 is provided with an external spline matching the internal spline.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric stapler, comprising a stapler body (1), an outer sheath (2), a driver (3) and a transmission mechanism, wherein the outer sheath (2) is arranged on the front side of the stapler body (1), and the driver (3) is slidably connected to the inner side of the outer sheath (2), characterized in that: A slot is provided at the bottom end of the holding portion of the anastomosis device body (1), and a reusable handle (200) is detachably connected to the slot. A transmission shaft sleeve (210) is provided at the top end of the reusable handle (200), and a driving assembly (400) for driving the transmission shaft sleeve (210) to rotate is provided in the reusable handle (200); The transmission mechanism comprises a rotating arm (4), a straight push rod (5) and a threaded transmission shaft (6); the straight push rod (5) is threadedly connected to the threaded transmission shaft (6), and the bottom of the threaded transmission shaft (6) is provided with a plug-in shaft (600) that is plugged into and matched with the transmission shaft sleeve (210).

2. The electric stapler according to claim 1, characterized in that: A limiting flange (602) is provided between the threaded transmission shaft (6) and the plug-in shaft (600), and a protective cover (500) is hingedly connected to the anastomosis device body (1) and can be engaged with or separated from the bottom of the slot.

3. The electric stapler according to claim 1, characterized in that: A plurality of transmission teeth (211) are provided on the inner wall of the transmission shaft sleeve (210), and a transmission member cooperating with the transmission teeth (211) is provided on the plug-in shaft (600).

4. The electric stapler according to claim 3, characterized in that: An odd number of the transmission teeth (211) are provided, and the transmission teeth (211) are arranged in a ring-like shape and at equal intervals; Alternatively, an even number of the transmission teeth (211) are provided, and the transmission teeth (211) are arranged in an annular staggered manner; The plug-in shaft (600) is provided with a through slot passing through the center on a peripheral side wall thereof; the transmission member comprises a fixed shaft (610) provided on a surface opposite to the through slot and a plug-in sheet (620) rotatably sleeved on the fixed shaft (610); at least one side of the plug-in sheet (620) extends out of the through slot and is limitedly engaged with a side edge of the transmission tooth (211).

5. The electric stapler according to claim 3, characterized in that: The transmission member is an external spline (630) provided on the outer peripheral wall of the plug-in shaft (600), and an internal spline (212) matching the external spline is provided on the inner wall of the transmission sleeve (210).

6. The electric stapler according to claim 5, characterized in that: The upper end of the key teeth of the internal spline (212) is provided with a guide surface for guiding the external spline (630) to engage therewith, and the lower end of the key teeth of the external spline (630) is provided with a wedge surface matching the guide surface.

7. The electric stapler according to claim 1, characterized in that: The driving assembly (400) comprises a motor and a power supply unit electrically connected to the motor, and the output end of the motor is connected to the bottom of the transmission shaft sleeve (210); The reusable handle (200) is provided with a power plug (220) electrically connected to the power supply unit, and the stapler body (1) is also provided with a display screen, a sensor unit and a buzzer unit electrically connected to the power plug (220).

8. The electric stapler according to claim 1, characterized in that: The rear portion of the driver (3) is provided with a connecting shaft (3-1), the middle portion of the rotating arm (4) is rotatably connected to the anastomosis device body (1), the front portion of the rotating arm (4) is provided with a vertically extending long slot (4-1), the connecting shaft (3-1) is slidably connected in the long slot (4-1), the rear bottom end of the rotating arm (4) is provided with a complementary notch (4-2), the straight push rod (5) is threadedly connected to the threaded transmission shaft (6), and the straight push rod (5) is provided with an integrated pin (5-1) that cooperates with the complementary notch (4-2).

9. The electric stapler according to any one of claims 1 to 8, characterized in that: The anastomosis device further comprises a firing sensing unit A (7) arranged in the anastomosis device body (1); the rotating arm (4) is provided with a starting state sensing block A (4-4) and a final state sensing block A (4-5); before the rotating arm (4) is fired, the starting state sensing block A (4-4) is located at the sensing position of the firing sensing unit A (7); after the rotating arm (4) is fired in place, the final state sensing block A (4-5) rotates to the sensing position of the firing sensing unit A (7).

10. The electric stapler according to claim 9, characterized in that: It also includes a firing sensing device B (8) arranged at the gripping portion of the anastomosis device body (1) and a firing sensing device C (9) arranged at the outer sheath (2); The straight push rod (5) is provided with an initial state sensing block B (5-2), and before firing, the initial state sensing block B (5-2) is located at a sensing position of a firing sensing device B (8); The driver (3) is provided with a termination state sensing block C (3-2), and after the firing is completed, the termination state sensing block C (3-2) moves to the sensing position of the firing sensing device C (9).

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