JP7480299B2 - Dual Power Cavity Intra-Cutting Stapler - Google Patents

Description

This application claims priority to a Chinese patent application filed on December 5, 2019 with the China Patent Office, bearing application number 201911237029.0 and entitled "Dual Power Intra-Cavity Cutting Stapler", and a Chinese patent application filed on December 5, 2019 with the China Patent Office, bearing application number 201922177671.6 and entitled "Dual Power Intra-Cavity Cutting Stapler", the entire contents of which are incorporated herein by reference.

The present invention relates to the technical field of medical instruments and further to a dual power cavity intra-cutting stapler.

In medicine, a stapler is an instrument that replaces manual suturing, and its main working principle is to cut or join tissues with titanium staples, similar to a paper stapler. Intracavity cutting staplers are widely applied in open or minimally invasive general surgery, obstetrics and gynecology, urology, thoracic surgery and pediatric surgery.

Currently, intracavity cutting staplers are mainly driven in two ways: electric and manual. Manual staplers are opened and closed manually, which is a cumbersome operation process. When cutting thick human tissue, the gripping force is large, which makes it more likely that the hand will shake, making it difficult to achieve a uniform and stable cutting effect. Electric intracavity cutting staplers are driven by electricity, and the closing and opening of the jaws in the cutting unit of the electric intracavity cutting stapler, as well as the forward and backward movement of the cutting blade, are all driven by electricity, which simplifies the operation steps, makes the operation simple and labor-saving, has a uniform cutting speed, and provides stable staple formation.

Although electric staplers are equipped with closing force feedback indication, during the cutting process, the cutting situation can only be observed with the naked eye or the cutting force can be judged by the indication screen of the instrument, and no tactile feedback can be provided to the human body, so intuitive feedback cannot be provided for the doctor to select a cutting unit with an appropriate closing height.

How to design a cutting stapler that can provide tactile feedback is a technical problem that those skilled in the art are trying to solve.

The present invention provides a dual power intracavity cutting stapler which can be driven by a manual closing handle alone to move a rack connecting block and provide tactile feedback to an operator, the specific technical scheme is as follows:
1. A dual power intracavity cutting stapler comprising:
a drive rack driven for translational movement by a drive device;
a rack connection block slidably connected to a distal end of the drive rack, the distal end of the rack connection block being removably connected to a push rod, the distal end of the push rod being connected to a cutting unit;
The machine includes a manual close handle rotatably connected to the main body by a handle connection shaft, the manual close handle moving the rack connection block relative to the drive rack when the manual close handle rotates.

Preferably, a T-shaped connection block is protrudingly disposed at the proximal end of the rack connection block, and the T-shaped connection block is inserted into the cavity of the drive rack.

Preferably, the rack connection block has a groove with a bottom opening in the longitudinal direction, and a ratchet pawl is rotatably arranged on the upper part of the manual closing handle, the ratchet pawl is capable of entering the groove of the rack connection block, and when the manual closing handle is closed, the ratchet pawl drives the rack connection block to move to the distal end.

Preferably, the manual close handle further includes a sliding key, and when the manual close handle is opened, the sliding key drives the rack connection block to move toward the proximal end.

Preferably, the sliding key includes a sliding key body, a relief claw is hinged to the tip of the sliding key body, and the relief claw can rotate back and forth only toward the proximal end.

Preferably, the ratchet pawl is provided with a relief hole, and the relief pawl can protrude upward from the relief hole.
A torsion spring is provided on the rotation shaft of the ratchet pawl to press the ratchet pawl against the rack connection block,
A torsion spring is provided on the handle connecting shaft to give the manual closing handle a tendency to open.

Preferably, a spring pin is slidably disposed in the inner chamber at the tip of the sliding key body, and the spring pin is held in its initial state by a compression spring provided within the sliding key body.

Preferably, the sliding key body can slide within the manual closing handle, and a lift spring is provided at the bottom end of the sliding key body;
The locking pin may further include a locking pin slidably disposed within the manual close handle, the locking pin having a sliding direction perpendicular to a rotation plane of the manual close handle and driving the sliding key body to move downward.

Preferably, the push rod is drivable to move a closing rod of the cutting unit, the closing rod moving to a distal end and pressing against a wedge surface of the magazine to close the magazine.

The present invention provides a dual power intracavity cutting stapler, in which a driving rack is translated by a driving device, a rack connection block is slidably connected to a distal end of the driving rack, the rack connection block can slide relative to the rack within a certain range, the driving rack can be driven to synchronously move the rack connection block, the distal end of the rack connection block is detachably connected to a push rod, the distal end of the push rod is connected to a cutting unit, the rack connection block and the push rod move synchronously, the manual closing handle is rotatably connected to the main body by a handle connection shaft, the manual closing handle can rotate relative to the main body, and the rack connection block can be moved relative to the driving rack when the manual closing handle rotates, and in use, an operator operates the manual closing handle to independently move the rack connection block relative to the driving rack, and the jaws are closed and opened by squeezing and loosening the manual closing handle, and the closing force is directly fed back to the manual closing handle, providing tactile feedback and providing guidance for the appropriate selection of the cutting unit.

In order to more clearly explain the technical solutions of the embodiments of the present invention or the prior art, the following briefly introduces the necessary drawings in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without making any inventive efforts.
1 is an overall external view of the dual power cavity internal cutting stapler of the present invention; FIG. FIG. 2 is a schematic diagram showing the internal configuration of a main body portion. FIG. 2 is a schematic diagram of a manual closing handle. FIG. 13 is a local configuration diagram showing how the rack connection block and the drive rack engage with each other. FIG. 11 is an exploded view of a second embodiment of a rack connection block and a drive rack. FIG. 13 is a perspective view of a second embodiment of a rack connection block and a drive rack. FIG. 2 is an overall configuration diagram of a sliding key. FIG. 1A and 1B are diagrams showing two movement states of a sliding key. FIG. 13 is a perspective view of the ratchet pawl, sliding key and close locking pin engaging with each other; FIG. 4 is a cross-sectional view of a manual closing handle. FIG. 13 is a schematic diagram showing a configuration in which a close locking pin is restricted in position. 13 is a configuration diagram of the stapler body and the cutting unit in an open state when the stapler body and the cutting unit are combined with each other; FIG. FIG. 5B is a local configuration diagram of a stapler body in a state corresponding to FIG. 5A . FIG. 5B is a local configuration diagram of the cutting unit in a state corresponding to FIG. 5A. 13 is a configuration diagram of the stapler body and the cutting unit in a closed state when the stapler body and the cutting unit are combined with each other. FIG. FIG. 6B is a local configuration diagram of a stapler body in a state corresponding to FIG. 6A . FIG. 6B is a local configuration diagram of the cutting unit in a state corresponding to FIG. 6A.

The present invention is centered on providing a dual power intracavity cutting stapler that can be independently actuated by a manual closing handle to move a rack connection block and provides tactile feedback to the operator.

In order to help those skilled in the art to better understand the technical solution of the present invention, the following will provide a detailed introduction and description of the dual power intracavity cutting stapler of the present invention in combination with drawings and specific embodiments.

As shown in FIG. 1, the overall external view of the dual power intracavity cutting stapler of the present invention includes a stapler body and a replaceable cutting unit, and FIG. 2A is a schematic diagram of the internal structure of the main body, including a drive rack 1, a rack connection block 2, a manual closing handle 3, etc., the drive rack 1 is translated by a drive unit 4, the drive rack 1 and the drive unit 4 are respectively mounted in the main body, the drive unit 4 adopts a form such as a reduction motor, the driving force is transmitted between the drive rack 1 and the drive unit 4 by gears, the drive rack 1 is guided by a slide rail provided inside the main body, and the drive rack 1 can slide back and forth along its own length direction by the drive unit 4. Because the transmission ratio of the reduction motor is huge, the transmission ratio of the planetary gear reduction mechanism reaches 400 or more, and the internal resistance of the reduction motor is large. When not energized, the output end gear of the reduction motor may be considered to be completely locked by the internal resistance, and in this case, the drive rack 1 is also locked by meshing with the transmission gear of the power member.

The rack connection block 2 is slidably connected to the distal end of the drive rack 1, the rack connection block 2 can slide back and forth relative to the drive rack 1 within a certain range, the movement direction of the rack connection block 2 is the same as the movement direction of the drive rack 1, the distal end of the rack connection block 2 is detachably connected to the push rod 5, the distal end of the push rod 5 is provided with a cutting unit 6, and when the push rod 5 moves, it drives the cutting unit 6.

In the medical device industry, the end of an instrument that is precisely grasped is called the proximal end, and the end away from the grasped part is correspondingly called the distal end. The right side of Figure 1 is the proximal end, and the left side is the distal end.

As shown in FIG. 2B, this is a schematic diagram of the configuration of the manual closing handle 3. The manual closing handle 3 is rotatably connected to the stapler body by a handle connection shaft 31, and the manual closing handle 3 rotates around the handle connection shaft 31 and can swing back and forth relative to the stapler body. The tip of the manual closing handle 3 can come into contact with the rack connection block 2, and when the manual closing handle 3 rotates, it moves the rack connection block 2 relative to the drive rack 1.

In use, the operator operates the manual close handle to move the rack connection block independently relative to the drive rack, and closes and opens the jaws by squeezing and loosening the manual close handle. When the cutting unit needs to be closed, the bottom end of the manual close handle 3 is brought close to the body, and when the cutting unit needs to be loosened, the bottom end of the manual close handle 3 is moved away from the body. Within the movement range of the rack connection block 2, the opening and closing of the cutting unit and the rotation of the manual close handle 3 are kept synchronized, and the closing force is directly fed back to the manual close handle, providing tactile feedback and guidance for the appropriate selection for the cutting unit.

During the process of closing the magazine of the cutting unit, the resistance received by the manual closing handle 3 varies depending on the thickness of the clamped tissue, and the magnitude of the resistance intuitively represents the thickness of the clamped tissue. In the actual example, the thrust value is about 50 to 250 N, and within this range, the selection of the cutting unit is considered to be suitable for the closing thickness of the tissue.

As shown in FIG. 2C, the rack connection block 2 and the drive rack 1 are engaged with each other. A T-shaped connection block 21 is protrudingly arranged at the proximal end of the rack connection block 2, and a bulky structure that acts as a position limiter is provided at the very end of the T-shaped connection block 21. A cavity is provided at the distal end of the drive rack 1, the opening size of the cavity is smaller than the internal size, and the length direction of the cavity is the same as the length direction of the drive rack 1. The T-shaped connection block 21 is inserted into the cavity of the drive rack 1, and the expanded part of the drive rack 1 can enter the cavity. The movement range of the rack connection block 2 is determined by the engagement between the T-shaped connection block 21 and the cavity at the distal end of the drive rack 1.

The above configuration is a preferred technical solution provided by the present invention. As shown in Figures 2D and 2E, which are an exploded view and a perspective view of a second embodiment of a rack connection block and a driving rack, respectively, a protrusion is provided at one end of the rack connection block 2, a waist-shaped hole is provided in the protrusion, and the length direction of the waist-shaped hole coincides with the length direction of the rack connection block 2. A notch is provided at one end of the driving rack 1, and the protrusion at the end of the rack connection block 2 is inserted into the driving rack 1. A connection pin is inserted into the driving rack 1, and the connection pin is inserted into the waist-shaped hole, movably connecting the driving rack 1 and the rack connection block 2. The waist-shaped hole limits the sliding range of the rack connection block 2. Therefore, as long as the rack connection block 2 and the driving rack 1 adopt a sliding connection drive form, both should fall within the protection scope of the present invention.

The rack connection block 2 is provided with a groove with a bottom opening in the length direction, and the tip of the manual close handle 3 enters the groove to engage with the rack connection block 2. Specifically, a ratchet claw 33 is rotatably arranged on the upper part of the manual close handle 3, the rotation axis of the ratchet claw 33 is at the proximal end, and the distal end of the ratchet claw 33 is movable, and the ratchet claw 33 can enter the groove of the rack connection block 2. When the manual close handle 3 is closed, the ratchet claw 33 drives the rack connection block 2 to move to the distal end. As shown in FIG. 2C, when the manual close handle 3 is closed, the bottom end of the manual close handle 3 moves to the right, the tip of the manual close handle 3 moves to the left, and the movable end of the ratchet claw 33 drives the rack connection block 2 to move toward the distal end.

The manual close handle 3 of the present invention further includes a sliding key 34, and when the manual close handle 3 is opened, the sliding key 34 drives the rack connection block 2 to move toward the proximal end, and when the manual close handle 3 is closed, the rack connection block 2 is moved by the ratchet pawl 33, and when the manual close handle 3 is opened, the sliding key 34 moves the rack connection block 2.

As shown in Figures 3A to 3C, the sliding key 34 is shown in an overall configuration diagram, an exploded view, and two movement state diagrams. Specifically, the sliding key 34 includes a sliding key body 341, and a relief claw 343 is hinged to the tip of the sliding key body 341. The relief claw 343 rotates back and forth only toward the proximal end. In a normal state, the length direction of the relief claw 343 and the length direction of the sliding key body 341 are approximately collinear. As shown in Figure 3C, when the manual close handle 3 is opened, the sliding key 34 moves to the right along with the manual close handle 3, and the rack connection block 2 applies a leftward acting force to the relief claw 343, but the relief claw 343 is blocked and cannot move to the left, thereby driving the rack connection block 2 to move to the proximal end and retracting the cutting unit 6.

As shown in FIG. 4A, this is a perspective view of the ratchet pawl 33, the sliding key 34, and the close locking pin 32 engaging with each other. The ratchet pawl 33 has an escape hole, and the escape pawl 343 can protrude upward from the escape hole. A torsion spring is provided on the rotation shaft of the ratchet pawl 33, so that the ratchet pawl 33 has a tendency to rotate upward, and the ratchet pawl 33 is always pressed against the rack connection block 2. A torsion spring is provided on the handle connection shaft 31, so that the manual close handle 3 has a tendency to open. When it is necessary to close, the fingers grip the manual close handle 3 tightly, and when it is to be released, the fingers relax and the manual close handle 3 automatically opens due to the elastic action.

As shown in FIG. 4B, which is a cross-sectional view of the manual closing handle 3, a spring pin 344 is slidably arranged in the inner chamber at the tip of the sliding key body 341. The spring pin 344 slides in the sliding key body 341, and the sliding direction is the same as the longitudinal direction of the sliding key body 341. The compression spring 345 provided in the sliding key body 341 holds the spring pin 344 in its initial state. That is, the compression spring 345 exerts an upward elastic force on the spring pin 344, so that the spring pin 344 has a tendency to move upward, which makes it firmly abut against the relief claw 343, which is held in an extended state, and the relief claw 343 can still return to its original position after rotating to the right in FIG. 3C.

As shown in FIG. 4B, the sliding key body 341 can slide within the manual closing handle 3, and a lift spring 342 is provided at the bottom end of the sliding key body 341. The lift spring 342 exerts an upward elastic force on the sliding key body 341, exposing the relief claw 343 upward.

The manual close handle 3 further includes a close locking pin 32 slidably arranged therein. The close locking pin 32 can slide back and forth in a guide groove in the manual close handle 3. The sliding direction of the close locking pin 32 is perpendicular to the rotation plane of the manual close handle 3. As shown in FIG. 4A, the close locking pin 32 can move back and forth along the direction of the arrow in the drawing. The close locking pin 32 drives the sliding key body 341 to move downward. When the close locking pin 32 is pushed from right to left, the close locking pin 32 drives the sliding key body 341 to move downward, compressing the lift spring 342. When the close locking pin 32 is pushed in the opposite direction from left to right, the sliding key body 341 moves upward due to the elasticity of the lift spring 342. At the same time, the manual close handle 3 automatically opens due to the torsional elasticity.

Specifically, as shown in FIG. 3B, a protrusion is provided on the side wall of the sliding key body 341, and the protrusion is provided with a slope. The close locking pin 32 moves laterally and is inserted into a positioning groove provided on the inside of the housing of the housing body, and then locked, driving the sliding key body 341 to move downward. The sliding key body 341 compresses the lift spring 342 and retracts the escape claw 343. In this case, it is locked by the positioning groove of the housing, and the entire handle cannot be opened in the opposite direction. As shown in FIG. 4C, this is a schematic diagram of a configuration in which the position of the close locking pin 32 is restricted, and the cutting unit 6 is thereby held in the original position.

Based on any one of the above technical proposals and their mutual combinations, the distal end of the push rod 5 is detachably connected to the cutting unit 6, and as shown in Figures 5A and 6A, the stapler body and the cutting unit are assembled together, and the cutting unit is in an open state and a closed state, respectively. Figures 5B and 5C are local configuration diagrams of the stapler body and the cutting unit in the state corresponding to Figure 5A, respectively. Figures 6B and 6C are local configuration diagrams of the stapler body and the cutting unit in the state corresponding to Figure 6A, respectively.

The magazine 62 is hinged by a rotating shaft, and a resilient piece is provided on the magazine 62, which allows the magazine 62 to be held in an open state. When the push rod 5 moves laterally, it moves the close rod 61 of the cutting unit 6. A pressing piece Y is provided on the distal end of the close rod 61, and when the close rod 61 moves toward the distal end, it is pressed against the wedge-shaped surface X of the magazine 62, thereby closing the magazine 62.

The dual power intracavity cutting stapler of the present invention manually operates the closing and opening operations using the cutting unit when not energized, and both closing and opening forces are intuitively expressed on the manual closing handle 3, effectively resolving the problem that the clamping force of a normal electric stapler is not intuitive. When electric drive is required, the motor moves the driving rack 1 laterally, and the driving rack 1 also moves the rack connection block 2, thereby realizing dual power drive.

The above description of the disclosed embodiments enables one skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

REFERENCE SIGNS LIST 1 ... Drive rack 2 ... Rack connection block 21 ... T-shaped connection block 3 ... Manual close handle 31 ... Handle connection shaft 32 ... Close locking pin 33 ... Ratchet claw 34 ... Slide key 341 ... Slide key body 342 ... Lift spring 343 ... Relief claw 344 ... Spring pin 345 ... Compression spring 4 ... Drive device 5 ... Push rod 6 ... Cutting unit 61 ... Close rod 62 ... Magazine

Claims (8)

1. A dual power cavity intracavity cutting stapler comprising:
A drive rack (1) driven to move in translation by a drive device (4);
a rack connection block (2) slidably connected to a distal end of the drive rack (1 ) and driveably movable by the drive rack (1) , the distal end of the rack connection block (2) being detachably connected to a push rod (5), the distal end of the push rod (5) being connected to a cutting unit (6);
a manual closing handle (3) that is rotatably connected to a main body of the dual power intracavity cutting stapler by a handle connecting shaft (31) and has a tip that contacts the rack connecting block (2), and when the manual closing handle (3) is rotated, the manual closing handle (3) moves the rack connecting block (2) relative to the driving rack (1);
When using the dual power intracavity cut stapler, an operator operates the manual closing handle (3) to move the rack connection block (2) independently relative to the driving rack (1), and closes and opens the jaws by squeezing and loosening the manual closing handle (3). When the cutting unit (6) needs to be closed, the bottom end of the manual closing handle (3) is brought close to the body of the dual power intracavity cut stapler, and when the cutting unit (6) needs to be loosened, the bottom end of the manual closing handle (3) is moved away from the body of the dual power intracavity cut stapler.
A dual power intracavity cutting stapler, characterized in that within the movement range of the rack connection block (2), the opening and closing of the cutting unit (6) and the rotation of the manual closing handle (3) are maintained synchronized, and the closing force is directly fed back to the manual closing handle (3). The dual power intracavity cutting stapler according to claim 1, characterized in that a T-shaped connection block (21) is protrudingly arranged at the proximal end of the rack connection block (2), and the T-shaped connection block (21) is inserted into the cavity of the drive rack (1). The dual power intracavity cutting stapler according to claim 1, characterized in that the rack connection block (2) has a groove with a bottom opening in the longitudinal direction, a ratchet pawl (33) is rotatably arranged on the upper part of the manual closing handle (3), the ratchet pawl (33) can enter the groove of the rack connection block (2), and when the manual closing handle (3) is closed, the ratchet pawl (33) drives the rack connection block (2) to move to the distal end. The dual power intracavity cutting stapler according to claim 3, characterized in that the manual closing handle (3) further includes a sliding key (34), and when the manual closing handle (3) is opened, the sliding key (34) drives the rack connection block (2) to move toward the proximal end. The dual power cavity cutting stapler according to claim 4, characterized in that the sliding key (34) includes a sliding key body (341), a relief claw (343) is hinged to the tip of the sliding key body (341), and the relief claw (343) can rotate only toward the proximal end. The ratchet pawl (33) is provided with a relief hole, and the relief pawl (343) can protrude upward from the relief hole,
A torsion spring is provided on the rotation shaft of the ratchet pawl (33) to press the ratchet pawl (33) against the rack connection block (2),
6. The dual power cavity intra-cutting stapler according to claim 5, characterized in that the handle connecting shaft (31) is provided with a torsion spring, which makes the manual closing handle (3) have an opening tendency. The dual power cavity internal cutting stapler according to claim 6, characterized in that a spring pin (344) is slidably arranged in the inner chamber at the tip of the sliding key body (341), and the top of the spring pin (344) is held in contact with the relief claw (343) by a compression spring (345) provided in the sliding key body (341). The sliding key body (341) can slide within the manual closing handle (3), and a lift spring (342) is provided at the bottom end of the sliding key body (341);
The dual power cavity intracavity cutting stapler according to claim 7, further comprising a close locking pin (32) slidably disposed within the manual close handle (3), the close locking pin (32) having a sliding direction perpendicular to the rotation plane of the manual close handle (3) and driving the sliding key body (341) to move downward.