A buffer driving device and an electric stapler

Abstract

The present invention discloses a buffer driving device, which includes a main buffer rod. One end of the main buffer rod is provided with a main buffer rod screw, and the other end of the main buffer rod is provided with a main buffer rod base and a reset buffer shaft support hole; a second buffer shaft sleeve, which is provided with a main buffer rod groove, a reset buffer shaft groove and a middle rotating shaft groove adjacent to each other in sequence; a reset buffer shaft, which passes through a reset buffer shaft compression spring and is inserted into the reset buffer shaft groove, and is inserted into the reset buffer shaft support hole along the reset buffer shaft groove; a middle rotating shaft, one end of which is provided with a middle rotating shaft T-shaped groove and a second step surface of the middle rotating shaft, and the other end of the middle rotating shaft is provided with a first step surface of the middle rotating shaft and is embedded in the middle rotating shaft groove. The present invention also discloses an electric stapler. The present invention not only has a simple structure and operation, but also the buffer driving device can effectively ensure that the suture needle rotates back to the expected position, and can effectively prevent mechanical damage caused by too long linear reciprocating motion due to large eccentricity of the motor. At the same time, the eccentricity can also be increased to avoid insufficient movement stroke resulting in the suture needle not rotating to the specified position.

Description

Technical Field

[0001] The present invention relates to a buffer driving device and an electric stapler. Background Art

[0002] Laparoscopic surgery is a newly developed minimally invasive method and an inevitable trend in the development of future surgical methods.

[0003] With the rapid progress of industrial manufacturing technology, the integration of related disciplines has laid a solid foundation for the development of new technologies and new methods. Coupled with the increasingly skilled operations of doctors, many past open surgeries have been replaced by endoscopic surgeries, greatly increasing the surgical options.

[0004] The traditional method of laparoscopic surgery is to insert a tubular working channel called a "trocar", and all subsequent operations are carried out through this channel; then, special lengthened surgical instruments are used to complete the same steps as open surgery under television monitoring to achieve the same surgical effect.

[0005] In recent years, minimally invasive surgery, which has the advantages of small trauma, fast recovery, light pain, high cure rate, etc., has developed rapidly. As a representative of minimally invasive surgery, laparoscopy is widely used in the surgical field, involving many diseases and surgeries, and is welcomed by patients. Moreover, with the continuous progress of science and technology and the improvement and innovation of surgical instruments, the application space of laparoscopy will be larger and larger.

[0006] Due to the limited space in the abdominal cavity or thoracic cavity, minimally invasive surgical instruments must be relatively small and long to achieve precise operation.

[0007] Undoubtedly, suturing is relatively difficult in minimally invasive abdominal surgery. It is necessary to use both hands to coordinate the operation of the suture needle and the needle holder to perform continuous suturing in a limited space. Many surgeons find this operation extremely difficult. The exposure of the suture needle is also likely to cause accidents, piercing other organs of the patient or injuring the surgeon and nurse.

[0008] When using a stapler, the sewing needle at the front end of the stapler reciprocates and rotates, and the sewing needle and thread penetrate the tissue for suturing. When operating a traditional semi-automatic stapler during surgery, by manipulating the firing trigger of the stapler for one cycle, that is, fully squeezing and then fully opening and resetting the trigger, the needle penetrates into the tissue to be sutured. Firing the trigger again enables the sewing needle to fully penetrate the tissue and the sewing needle to return to its position. During this process, the trigger needs to be squeezed at least twice. Because each firing must fully position the sewing needle, squeezing the trigger again can smoothly perform suturing. Otherwise, the trigger needs to be repeatedly squeezed to position the sewing needle. Due to the characteristics of abdominal cavity instruments being thin and long, each squeeze of the trigger will cause the front-end sewing needle actuator inside the abdominal cavity to shake. Any additional shake after the sewing needle enters the tissue will cause the sewing needle to pull the tissue, posing a surgical risk of tissue tearing. And during a surgery, the surgeon needs to continuously press the firing trigger several times, which is extremely likely to cause hand fatigue, affecting the suturing effect or prolonging the suturing time.

[0009] Chinese Utility Model Patent CN211433078U discloses a firing device for a laparoscopic anastomosis stapler with a protection function, which is arranged inside the stapler handle and is used to pull the rack of the swing head at the front end of the stapler to realize the rotation of the sewing needle. A wrench is hinged at the upper end of the handle, and a guide plate that can extend in and out of the handle is provided at the lower end of the wrench. A sleeve is slidably arranged inside the handle, and a compression spring with a travel greater than that of the reset spring at the rear end of the rack is arranged inside the sleeve. A connecting column is connected to the upper end of the sleeve, and a slider with a wire rope connected to its center is arranged between the connecting column and the compression spring. The lower end of the wire rope is connected to the inner end of the guide plate, and the upper end of the connecting column is connected to a pulling wire, and the pulling wire is connected to the rack. However, the structure of the above-mentioned utility model for a mechanical trigger-operated instrument can only provide one-way buffering. Summary of the Invention

[0010] Object of the Invention: The present invention makes improvements in view of the problems existing in the above-mentioned prior art. That is, the present invention discloses a buffer driving device and an electric stapler, which can reduce the shaking of the actuator caused by operating the instrument, reduce the risk of tissue traction injury, and can also reduce the operating intensity of the surgeon and obtain a comfortable hand feeling.

[0011] Technical Solution: A buffer driving device includes:

[0012] A main buffer rod, one end of which is provided with a main buffer rod screw, and the other end of the main buffer rod is provided with a main buffer rod base, and a reset buffer shaft support hole is recessed in the middle of the main buffer rod base;

[0013] A second buffer shaft sleeve, which is provided with a main buffer rod groove, a reset buffer shaft groove and a middle rotating shaft groove adjacent to each other in sequence. The main buffer rod sequentially passes through a main buffer rod compression spring and a main buffer rod support plate and is connected to the connecting pipe through the main buffer rod screw. The main buffer rod compression spring and the main buffer rod support plate are both embedded in the main buffer rod groove;

[0014] The reset buffer shaft passes through the reset buffer shaft compression spring and inserts into the reset buffer shaft groove, and then inserts into the reset buffer shaft support hole along the reset buffer shaft groove. The reset buffer shaft compression spring is embedded in the reset buffer shaft groove;

[0015] The middle rotating shaft has a middle rotating shaft T-shaped groove and a second step surface of the middle rotating shaft at one end, and a first step surface of the middle rotating shaft at the other end and is embedded in the middle rotating shaft groove.

[0016] Furthermore, it further includes a push-pull rod. A through runway-shaped long slot hole is provided in the middle of the push-pull rod. A connecting pipe is provided on one side of the push-pull rod, and an internal thread is provided on the inner side of the connecting pipe. The connecting pipe is connected to the main buffer rod screw.

[0017] Furthermore, it further includes a firing rod. A firing rod T-shaped shaft is provided at one end of the firing rod, and the firing rod T-shaped shaft is inserted into the middle rotating shaft T-shaped groove.

[0018] Even further, a connecting ring is sleeved outside the insertion part of the firing rod T-shaped shaft and the middle rotating shaft T-shaped groove, and an open end is provided at the other end of the firing rod.

[0019] Even more further, a connecting ring pressing tongue is provided at one end of the connecting ring.

[0020] Furthermore, it further includes a first buffer shaft sleeve, and the first buffer shaft sleeve is sleeved outside the second buffer shaft sleeve.

[0021] Even further, a first buffer shaft sleeve pressing tongue is provided in the middle of the outside of the first buffer shaft sleeve.

[0022] An electric stapler includes the above-mentioned buffer driving device.

[0023] Beneficial effects: A buffer driving device and an electric stapler disclosed by the present invention have the following beneficial effects:

[0024] The structure and operation are simple. The buffer driving device can effectively ensure that the sewing needle rotates back to the expected position, and can effectively prevent mechanical damage caused by excessive linear reciprocating motion due to large eccentricity of the motor. At the same time, the eccentricity can be increased to avoid insufficient movement stroke resulting in the sewing needle not rotating to the specified position. Description of the Drawings

[0025] Figure 1 It is an exploded view of the buffer driving device.

[0026] Figure 2 It is a three-dimensional diagram of an electric stapler disclosed by the present invention.

[0027] Figure 3 It is a view of the initial first position of the buffer driving device and the eccentric wheel component of the present invention.

[0028] Figure 4 Schematic diagram of the second buffer bushing

[0029] Figure 5 Schematic diagram of the initial preload release position of the buffer drive device of the present invention

[0030] Figure 6 Schematic diagram of the pulling limit position of the buffer drive device of the present invention

[0031] Wherein:

[0032] 100 - Buffer drive device

[0033] 110 - Firing rod 111 - T-shaped shaft of the firing rod

[0034] 120 - Connecting ring 121 - Pressing tongue of the connecting ring

[0035] 130 - Intermediate rotating shaft 131 - T-shaped groove of the intermediate rotating shaft

[0036] 132 - First step surface of the intermediate rotating shaft 133 - Second step surface of the intermediate rotating shaft

[0037] 140 - Reset buffer shaft 141 - Left end surface of the reset buffer shaft

[0038] 150 - Compression spring of the reset buffer shaft

[0039] 160 - First buffer bushing 161 - Pressing tongue of the first buffer bushing

[0040] 170 - Second buffer bushing 171 - Main buffer rod groove

[0041] 172 - Reset buffer shaft groove 174 - Intermediate rotating shaft groove

[0042] 180 - Main buffer rod 181 - Screw of the main buffer rod

[0043] 182 - Base of the main buffer rod 183 - Support hole for the reset buffer shaft

[0044] 190 - Compression spring of the main buffer rod 1100 - Support plate of the main buffer rod

[0045] 1110 - Push-pull rod 1111 - Long slot hole

[0046] 1112 - Connecting pipe

[0047] 200 - Eccentric wheel component

[0048] 222 - Upper shaft of the eccentric wheel stepped shaft

[0049] 300 - Energy storage device

[0050] 400 - Motor Assembly

[0051] 500 - Swing Angle Mechanism

[0052] 600 - Rotating Mechanism

[0053] 700 - Pressing Needle Piece Reset Mechanism

[0054] 800 - Sewing Needle Execution Device Detailed Implementation Manner

[0055] The following details the specific implementation manner of the present invention.

[0056] As Figure 1 shown, the buffer drive device 100 includes:

[0057] The main buffer rod 180 has a main buffer rod screw 181 at one end and a main buffer rod base 182 at the other end. A reset buffer shaft support hole 183 is concavely formed in the middle of the main buffer rod base 182;

[0058] The second buffer shaft sleeve 170 is provided with a main buffer rod groove 171, a reset buffer shaft groove 172, and a middle rotating shaft groove 174 (as Figure 4 shown) that are adjacent in sequence. The main buffer rod 180 sequentially passes through the main buffer rod compression spring 190 and the main buffer rod support plate 1100 and is connected to the connecting pipe 1112 through the main buffer rod screw 181. The main buffer rod compression spring 190 and the main buffer rod support plate 1100 are both embedded in the main buffer rod groove 171;

[0059] The reset buffer shaft 140 passes through the reset buffer shaft compression spring 150 and is inserted into the reset buffer shaft groove 172, and then inserted into the reset buffer shaft support hole 183 along the reset buffer shaft groove 172. The reset buffer shaft compression spring 150 is embedded in the reset buffer shaft groove 172;

[0060] The middle rotating shaft 130 has a middle rotating shaft T-shaped groove 131 and a middle rotating shaft second step surface 133 at one end, and a middle rotating shaft first step surface 132 at the other end and is embedded in the middle rotating shaft groove 174.

[0061] Furthermore, it further includes a push-pull rod 1110. The middle of the push-pull rod 1110 is provided with a through runway-shaped long slot hole 1111. One side of the push-pull rod 1110 is provided with a connecting pipe 1112. An internal thread is provided on the inner side of the connecting pipe 1112, and the connecting pipe 1112 is connected to the main buffer rod screw 181.

[0062] Furthermore, it further includes a firing rod 110. One end of the firing rod 110 is provided with a firing rod T-shaped shaft 111, and the firing rod T-shaped shaft 111 is inserted into the middle rotating shaft T-shaped groove 131.

[0063] Further, a connecting ring 120 is sleeved outside the insertion joint of the T-shaped shaft 111 of the firing rod and the T-shaped groove 131 of the middle rotating shaft. The other end of the firing rod 110 is provided with an opening, which is used to connect the flexible shaft.

[0064] Even further, one end of the connecting ring 120 is provided with a connecting ring pressing tongue 121. The firing rod 110 and the middle rotating shaft 130 are connected through the T-shaped groove, and the connecting ring 120 is sleeved in the middle. Then, an external force is used to press down the connecting ring pressing tongue 121 to deform the connecting ring 120. The deformed connecting ring 120 is stuck with the second step surface 133 of the middle rotating shaft. The main purpose is to prevent the connecting ring 120 from moving and falling off during the movement process.

[0065] Further, it further includes a first buffer shaft sleeve 160, and the first buffer shaft sleeve 160 is sleeved outside the second buffer shaft sleeve 170.

[0066] Even further, a first buffer shaft sleeve pressing tongue 161 is provided in the middle of the outside of the first buffer shaft sleeve 160.

[0067] An electric stapler includes the above-mentioned buffer driving device 100.

[0068] Further, the electric stapler further includes an eccentric wheel component 200, an energy storage device 300, a motor assembly 400, a swing angle mechanism 500, a rotation mechanism 600, a needle pressing piece reset mechanism 700, and a sewing needle execution device 800.

[0069] Figure 1 It is an exploded view of the buffer driving device of the present invention. As Figure 1 shown, the push-pull rod 1110 is connected to the main buffer rod screw 181 at the main buffer rod 180 through the threaded hole 1111, and the main buffer rod compression spring 190 and the main buffer rod support plate 1100 are passed through in the middle and loaded into the main buffer rod groove 171 of the second buffer shaft sleeve 170 (shown in Figure 6). The main buffer rod support plate 1100 assists in supporting the main buffer rod 180 to ensure coaxial reciprocating motion. The main buffer rod compression spring 190 is pre-compressed. The pre-compression force is greater than the normal operating resistance of the sewing needle execution device 800. When the rack in the sewing needle execution device 800 runs to the end position, the eccentric wheel component 200 continues to rotate.

[0070] As Figure 2 and Figure 3 shown, the energy storage device 300 provides kinetic energy to the motor assembly 400. The output end of the motor assembly 400 is drivingly connected to the eccentric wheel component 200. The upper shaft 222 of the eccentric wheel step shaft of the eccentric wheel component 200 is inserted into the long slot hole 1111 of the push-pull rod 1110, so that the eccentric wheel component 200 rotates, and here it is transformed into the reciprocating linear motion of the buffer driving device 100. When the eccentric wheel component 200 rotates one circle, the buffer driving device 100 executes one round-trip motion.

[0071] As Figure 5 shown, the eccentric wheel component 200 pulls the push-pull rod 1110 and the main buffer rod 180, compresses the main buffer rod compression spring 190, and offsets its excess stroke by the main buffer rod compression spring 190.

[0072] The reset buffer shaft 140 is sleeved into the reset buffer shaft compression spring 150 and installed in the reset buffer shaft groove 172 of the second buffer shaft sleeve 170. The reset buffer shaft 140 is inserted into the reset buffer shaft support hole 183 to assist in supporting the reset buffer shaft 140. The reset buffer shaft compression spring 150 is pre-compressed. The eccentric wheel component 200 is in the initial position (shown in Figure 4), and the central shaft 130 pre-presses the reset buffer shaft 140 to compress the reset buffer shaft compression spring 150.

[0073] The driving process of the buffer driving device 100 is as Figure 1 shown in Figures 3-6. The push-pull rod 1110 is connected to the main buffer rod screw 181 at the main buffer rod 180 through the threaded hole 1111 and is pulled to the right. The main buffer rod base 182 contacts and pulls the outer end face of the main buffer rod groove 171 through the main buffer rod compression spring 190 and the main buffer rod support plate 1100. In this way, the outer end face of the central shaft groove 174 pulls the first step surface 132 of the central shaft 130 of the central shaft to the right. The T-shaped groove 131 of the central shaft 130 of the central shaft is connected and matched with the T-shaped shaft 111 of the firing rod 110 of the firing rod. A connecting ring 120 is sleeved at the connection part, and the lower pressing connection ring tongue 120 is clamped with the second step surface 133 of the central shaft to fix it in this way, realizing that the eccentric wheel component 200 rotates to drive the firing rod 110 to move linearly to the right.

[0074] The push-pull rod 1110 is connected to the main buffer rod screw 181 at the main buffer rod 180 through the threaded hole 1111 and is pushed to the left. The main buffer rod base 182 pushes the second buffer shaft sleeve 170. The second buffer shaft sleeve 170 presses the reset buffer shaft compression spring 150, so that it pushes the left end face of the reset buffer shaft 141, and the reset buffer shaft 140 pushes the central shaft 130 and the firing rod 110 to move to the left first. Realizing that the eccentric wheel component 200 rotates to drive the buffer driving device 100 to reciprocate linearly, two-way spring buffer can be realized.

[0075] The above has made a detailed description of the embodiments of the present invention. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A buffer driving device, characterized in that, Comprising: A main buffer rod, one end of which is provided with a main buffer rod screw, and the other end of the main buffer rod is provided with a main buffer rod base, and a reset buffer shaft support hole is concavely formed in the middle of the main buffer rod base; A second buffer shaft sleeve, which is provided with a main buffer rod groove, a reset buffer shaft groove and a middle rotating shaft groove adjacent to each other in sequence. The main buffer rod sequentially passes through a main buffer rod compression spring and a main buffer rod support plate and is connected to a connecting pipe through the main buffer rod screw. The main buffer rod compression spring and the main buffer rod support plate are both embedded in the main buffer rod groove; A reset buffer shaft, which passes through a reset buffer shaft compression spring and is inserted into the reset buffer shaft groove, and is inserted into the reset buffer shaft support hole along the reset buffer shaft groove. The reset buffer shaft compression spring is embedded in the reset buffer shaft groove; A middle rotating shaft, one end of which is provided with a middle rotating shaft T-shaped groove and a second step surface of the middle rotating shaft, and the other end of the middle rotating shaft is provided with a first step surface of the middle rotating shaft and is embedded in the middle rotating shaft groove; A push rod, the middle of which is provided with a through runway-shaped long slot hole. One side of the push rod is provided with a connecting pipe, and an internal thread is provided on the inner side of the connecting pipe. The connecting pipe is connected to the main buffer rod screw.

2. A buffer driving device according to claim 1, characterized in that It further includes a firing rod, one end of which is provided with a firing rod T-shaped shaft, and the firing rod T-shaped shaft is inserted into the middle rotating shaft T-shaped groove.

3. The buffer driving device according to claim 2, characterized in that, A connecting ring is sleeved outside the insertion joint of the firing rod T-shaped shaft and the middle rotating shaft T-shaped groove, and the other end of the firing rod is provided with an open end.

4. A buffer driving device according to claim 3, characterized in that, One end of the connecting ring is provided with a connecting ring pressing tongue.

5. A buffer driving device according to claim 1, characterized in that, It further includes a first buffer shaft sleeve, and the first buffer shaft sleeve is sleeved outside the second buffer shaft sleeve.

6. A buffer driving device according to claim 5, characterized in that, A first buffer shaft sleeve pressing tongue is provided in the middle of the outside of the first buffer shaft sleeve.

7. An electric stapler, characterized in that, Comprising the buffer driving device according to any one of claims 1-6.

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