Buffer driving device and electric stitching instrumentTechnical Field
The invention relates to a buffer driving device and an electric stitching instrument.
Background
Laparoscopic surgery is a newly developed minimally invasive method, and is a necessary trend for the development of future surgical methods.
Along with the rapid progress of industrial manufacturing technology, the fusion of relevant disciplines lays a firm foundation for developing new technologies and new methods, and doctors are more and more skilled to operate, so that a plurality of past open operations are replaced by intra-cavity operations, and the operation selection opportunities are greatly increased.
The traditional method of laparoscopic surgery is to insert a pipeline-shaped working channel called trocar, then all operations are carried out through the pipeline, and then the steps similar to the open surgery are finished under the monitoring of a television by using a special lengthening surgical instrument, so that the same surgical effect is achieved.
In recent years, the development of minimally invasive surgery with the advantages of small wound, quick recovery, light pain, high cure rate and the like is rapid, laparoscopes are widely applied as representatives of minimally invasive surgery in the surgical field, a plurality of diseases and operations are involved, the minimally invasive surgery is popular for patients, and with the continuous progress of scientific technology, the improvement and innovation of surgical instruments are carried out, so that the deployment space of the laparoscopes is increasingly wider.
Minimally invasive surgical instruments are necessarily small and long due to the restriction of the abdominal or intrathoracic space. Accurate operation can be achieved.
The operation difficulty in minimally invasive abdominal surgery is undoubtedly suturing. It is desirable to use both hands to coordinate the operation of the needle and needle holder to provide continuous suturing in a confined space. Many surgeons find this procedure difficult. The exposure of the needle can also be prone to accidents, puncturing other organs of the patient or injuring the surgeon, nurse.
When the suture device is used, the suture needle and the suture thread penetrate tissues to suture through the reciprocating rotary motion of the suture needle at the front end of the suture device. When the traditional semiautomatic stitching instrument is operated to perform surgery, the stitching instrument is controlled to trigger the trigger to rotate, so that the trigger is completely held down and completely opened and reset, the needle is enabled to penetrate into the stitching tissue, and the trigger is triggered again, so that the stitching needle completely penetrates the tissue and the stitching needle is reset. In the process, the trigger needs to be held at least twice, so that the needle needs to be completely positioned at the fixed position during each firing, and the suture can be smoothly performed by holding the trigger again, otherwise, the needle needs to be repeatedly held in place. Because of the thin and long nature of the abdominal cavity instrument, each actuation of the trigger can cause the shake of the front needle actuator in the abdominal cavity, and the shake again after the needle enters the tissue can cause the surgical risk of tissue tearing caused by the needle pulling the tissue. One operation requires the operator to continuously press the trigger for several times, which is very easy to cause hand fatigue, affect the suture effect or prolong the suture time.
The utility model patent CN211433078U discloses a triggering device of a laparoscope anastomat with a protection function, which is arranged in a handle of the anastomat, a rack for pulling a swinging head at the front end of the anastomat is used for realizing the rotation of a suture needle, a spanner is hinged at the upper end of the handle, a guide plate inside and outside a telescopic handle is arranged at the lower end of the spanner, a sleeve is arranged in the handle in a sliding manner, a compression spring with a stroke larger than that of a return spring at the rear end of the rack is arranged in the sleeve, a connecting column is connected at the upper end of the sleeve, a sliding block with a steel wire rope connected at the center is arranged between the connecting column and the compression spring, the lower end of the steel wire rope is connected with the inner end of the guide plate, a traction steel wire is connected at the upper end of the connecting column, and the traction steel wire is connected with the rack. The above described inventive arrangements are useful with mechanical trigger operated instruments and can only buffer unidirectionally.
Disclosure of Invention
The invention aims to solve the problems in the prior art, namely the invention discloses a buffer driving device and an electric stitching instrument, which can reduce the shake of an actuating mechanism caused by an operation instrument, reduce the risk of tissue traction injury, reduce the operation strength of operators and obtain comfortable hand feeling.
The technical scheme is that the buffer driving device comprises:
The main buffer rod is provided with a main buffer rod screw at one end, a main buffer rod base is arranged at the other end of the main buffer rod, and a reset buffer shaft supporting hole is formed in the middle of the main buffer rod base in a concave manner;
The second buffer shaft sleeve is provided with a main buffer rod groove, a reset buffer shaft groove and a transit shaft groove which are adjacent in sequence, the main buffer rod sequentially penetrates through a main buffer rod pressure spring and a main buffer rod supporting plate to be connected with the connecting pipe through a main buffer rod screw rod, and the main buffer rod pressure spring and the main buffer rod supporting plate are embedded in the main buffer rod groove;
The reset buffer shaft penetrates through the reset buffer shaft compression spring to be inserted into the reset buffer shaft groove and is inserted into the reset buffer shaft support hole along the reset buffer shaft groove, and the reset buffer shaft compression spring is embedded into the reset buffer shaft groove;
the middle rotating shaft is provided with a middle rotating shaft T-shaped groove and a middle rotating shaft second step surface at one end, and a middle rotating shaft first step surface is arranged at the other end of the middle rotating shaft and embedded into the middle rotating shaft groove.
Further, the buffer rod comprises a push-pull rod, a long slot hole penetrating through the middle of the push-pull rod is formed in the middle of the push-pull rod, a connecting pipe is arranged on one side of the push-pull rod, internal threads are formed in the inner side of the connecting pipe, and the connecting pipe is connected with the main buffer rod screw rod.
Further, the device also comprises a firing bar, wherein one end of the firing bar is provided with a firing bar T-shaped shaft, and the firing bar T-shaped shaft is spliced with the transit T-shaped groove.
Furthermore, a connecting ring is sleeved on the outer side of the inserted position of the T-shaped shaft of the firing bar and the T-shaped groove of the middle shaft, and the other end of the firing bar is provided with an opening.
Still further, one end of the connecting ring is provided with a connecting ring pressing tongue.
Further, the novel buffer further comprises a first buffer shaft sleeve, and the first buffer shaft sleeve is sleeved on the outer side of the second buffer shaft sleeve.
Further, a first buffer shaft sleeve pressing tongue is arranged in the middle of the outer side of the first buffer shaft sleeve.
An electric stitching instrument comprises the buffer driving device.
The buffer driving device and the electric stitching instrument have the beneficial effects that:
The structure and the operation are simple, the buffer driving device can effectively ensure that the suture needle rotates to the expected position, can effectively prevent mechanical damage caused by overlong linear reciprocating motion due to large motor eccentricity, can also improve the eccentricity, and can avoid the situation that the suture needle rotates to the appointed position due to insufficient motion stroke.
Drawings
Fig. 1 is an exploded view of a buffer drive device.
Fig. 2 is a perspective view of an electric stapler according to the present disclosure.
Fig. 3 is a view of the initial first position of the buffer drive, eccentric member of the present invention.
FIG. 4 is a schematic view of a second damper sleeve;
FIG. 5 is a schematic view of a buffer driving device for releasing an initial pre-compression position according to the present invention.
Fig. 6 is a schematic drawing showing a pulling limit position of the buffer driving device of the present invention.
Wherein:
100-buffer driving device
110-Firing bar 111-firing bar T-shaped shaft
120-Connecting ring 121-connecting ring pressing tongue
130-Middle rotary shaft 131-middle rotary shaft T-shaped groove
132-Intermediate shaft first step surface 133-intermediate shaft second step surface
140-Reset buffer shaft 141-reset buffer shaft left end face
150-Reset buffer shaft pressure spring
160-First-bumper sleeve 161-first-bumper sleeve tongue
170-Second buffer sleeve 171-main buffer rod groove
172-Reset buffer shaft groove 174-middle rotating shaft groove
180-Main buffer rod 181-Main buffer rod screw
182-Main buffer rod base 183-reset buffer shaft support hole
190-Main buffer rod compression spring 1100-Main buffer rod support plate
1110-Push-pull rod 1111-long slot
1112-Connecting pipe
200-Eccentric wheel part
222-Eccentric wheel step shaft upper shaft
300-Energy storage device
400-Motor assembly
500-Swing angle mechanism
600-Rotation mechanism
700-Needle pressing sheet reset mechanism
800-Stitch execution device
Detailed Description
The following detailed description of specific embodiments of the invention.
As shown in fig. 1, the buffer driving apparatus 100 includes:
A main buffer rod 180, one end of which is provided with a main buffer rod screw 181, the other end of the main buffer rod 180 is provided with a main buffer rod base 182, and a reset buffer shaft supporting hole 183 is concavely formed in the middle of the main buffer rod base 182;
A second buffer shaft sleeve 170, which is provided with a main buffer rod groove 171, a reset buffer shaft groove 172 and a middle buffer rod groove 174 (as shown in fig. 4) adjacent in sequence, wherein the main buffer rod 180 sequentially passes through a main buffer rod compression spring 190 and a main buffer rod supporting plate 1100 and is connected with a connecting pipe 1112 through a main buffer rod screw 181, and the main buffer rod compression spring 190 and the main buffer rod supporting plate 1100 are embedded in the main buffer rod groove 171;
The reset buffer shaft 140 is inserted into the reset buffer shaft groove 172 through the reset buffer shaft pressure spring 150, and is inserted into the reset buffer shaft supporting hole 183 along the reset buffer shaft groove 172, and the reset buffer shaft pressure spring 150 is embedded in the reset buffer shaft groove 172;
the middle rotating shaft 130 is provided with 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 is arranged at the other end of the middle rotating shaft 130 and is embedded into the middle rotating shaft groove 174.
Further, the device further comprises a push-pull rod 1110, a long slot 1111 penetrating the track is provided in the middle of the push-pull rod 1110, a connecting pipe 1112 is provided on one side of the push-pull rod 1110, an internal thread is provided on the inner side of the connecting pipe 1112, and the connecting pipe 1112 is connected with the main buffer rod screw 181.
Further, the device also comprises a firing bar 110, one end of which is provided with a firing bar T-shaped shaft 111, and the firing bar T-shaped shaft 111 is inserted into the middle T-shaped groove 131.
Further, a connecting ring 120 is sleeved outside the plugging position of the T-shaped shaft 111 of the firing bar and the T-shaped slot 131 of the middle shaft, and the other end of the firing bar 110 is provided with an opening. The opening is used for being connected with a flexible shaft.
Still further, one end of the connection ring 120 is provided with a connection ring pressing tongue 121. The firing bar 110 and the middle rotating shaft 130 are connected through a T-shaped groove, and the middle part of the firing bar is sleeved into the connecting ring 120. Then, the connecting ring pressing tongue 121 is pressed down by an external force, so that the connecting ring 120 is deformed, and the deformed connecting ring 120 is clamped with the second step surface 133 of the middle shaft. The main purpose is to prevent the movement of the connecting ring 120 from moving out of the way.
Further, the damper further includes a first damper sleeve 160, and the first damper sleeve 160 is sleeved outside the second damper sleeve 170.
Further, a first damper sleeve pressing tongue 161 is provided at the outer middle portion of the first damper sleeve 160.
An electric stapler includes the buffer driving device 100.
Further, the electric stapler further comprises an eccentric wheel component 200, an energy storage device 300, a motor assembly 400, a swing angle mechanism 500, a rotating mechanism 600, a needle pressing sheet reset mechanism 700 and a needle executing device 800.
Fig. 1 is an exploded view of a buffer driving apparatus of the present invention. As shown in fig. 1, the push-pull rod 1110 is connected to the main buffer rod screw 181 at the main buffer rod 180 through the screw hole 1111, and the main buffer rod compression spring 190 is inserted in the middle, the main buffer rod support plate 1100 is installed in the main buffer rod groove 171 of the second buffer shaft sleeve 170 (fig. 6), and the main buffer rod support plate 1100 supports the main buffer rod 180 in an auxiliary manner to ensure coaxial reciprocating motion. The main buffer rod compression springs 190 are pre-compressed. The pre-compression force is greater than the normal operating resistance of the needle implement 800. In the end position of the rack within the needle implement 800, the cam member 200 continues to rotate,
As shown in fig. 2 and 3, the energy storage device 300 provides kinetic energy to the motor assembly 400, the output end of the motor assembly 400 is in transmission connection with the eccentric wheel component 200, and the eccentric wheel step shaft upper shaft 222 of the eccentric wheel component 200 is inserted into the long groove 1111 of the push-pull rod 1110, so that the eccentric wheel component 200 rotates, and is converted into reciprocating linear motion of the buffer driving device 100. The cam member 200 makes one rotation, and the buffer driving device 100 performs a reciprocating motion.
As shown in fig. 5, the eccentric wheel part 200 pulls the push-pull rod 1110 and the main buffer rod 180, compressing the main buffer rod compression spring 190 so that the excessive stroke thereof is offset by the main buffer rod compression spring 190.
The reset buffer shaft 140 is sleeved into the reset buffer shaft compression spring 150 and is arranged 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 supporting hole 183, and the reset buffer shaft 140 is supported in an auxiliary mode. The reset buffer shaft compression spring 150 is pre-compressed. The eccentric member 200 is positioned in the home position (fig. 4) where the shaft 130 pre-presses the reset buffer shaft 140 to compress the reset buffer shaft compression spring 150.
As shown in fig. 1 and 3-6, in the driving process of the buffer driving device 100, a push-pull rod 1110 is connected with a main buffer rod screw 181 at a position of a main buffer rod 180 through a threaded hole 1111 to pull to the right, a main buffer rod base 182 contacts and pulls the outer end surface of a main buffer rod groove 171 through a main buffer rod pressure spring 190 and a main buffer rod supporting plate 1100, so that the outer end surface of a central shaft groove 174 pulls the first step surface 132 of the middle shaft 130 to the right, the T-shaped groove 131 of the middle shaft 130 is matched and connected with the T-shaped shaft 111 of the firing rod 110, the connecting part is sleeved into a connecting ring 120, and the clamping position of the pressing tongue 120 of the connecting ring is fixed with the second step surface 133 of the middle shaft, so that the rotation of the eccentric wheel component 200 is realized to drive the firing rod 110 to move linearly to the right.
The push-pull rod 1110 is connected with the main buffer rod screw 181 at the position of the main buffer rod 180 through the threaded hole 1111 to push to the left, the main buffer rod base 182 pushes the second buffer shaft sleeve 170, and the second buffer shaft sleeve 170 presses the reset buffer shaft pressure spring 150, so that the reset buffer shaft 140 pushes the reset buffer shaft left end face 141 to push the middle rotating shaft 130 to the left and the firing rod 110 to move to the left. Realize the reciprocating linear motion of the buffer driving device 100 driven by the rotation of the eccentric wheel part 200, and can realize the buffer of the bidirectional pressure spring.
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.