JP2023505191A - Dual power intracavity cutting stapler - Google Patents

Abstract

This application discloses a dual power intracavity cutting stapler. The rack connection block (2) is slidably connected to the distal end of the drive rack (1) and is slidable relative to the rack (1) within a certain range and the drive rack (1) can drive the rack connection block (2) to move synchronously, 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 disconnected It can be connected to the unit (6), the rack connection block (2) and the push rod (5) move synchronously, and the manual close handle (3) is rotatably connected to the main body by the handle connection shaft (31). The closing handle (3) can be rotated relative to the body, and when the manual closing handle (3) is rotated, the rack connecting block (2) can be moved relative to the driving rack (1). In use, the operator manipulates the manual close handle (3) and moves the rack connecting block (2) independently relative to the drive rack (1) by squeezing and loosening the manual close handle (3). , to achieve closing and opening of the jaws, the closing force being directly fed back to the manual closing handle (3), providing tactile feedback and providing guidance on the proper selection for the cutting unit (6). [Selection drawing] Fig. 2A

Description

This application was filed with the Chinese Patent Office on December 5, 2019, with application number 201911237029.0, titled "Dual Power Intracavity Cutting Stapler", and dated December 5, 2019 Claiming priority of the Chinese patent application filed with the Chinese Patent Office, application number 201922177671.6 and titled "Dual Power Intra-Cavity Cutting Stapler", the entire contents of which are incorporated by reference, incorporated into this application.

The present invention relates to the technical field of medical instruments, and more particularly to a dual power intracavity cutting stapler.

A stapler is an alternative instrument in medicine to manual suturing, whose main principle of operation is to cut or join tissue with titanium staples, similar to a paper binder. Intracavity cutting staplers have been extensively applied in open or minimally invasive general surgery, obstetrics and gynecology, urology, thoracic surgery and pediatric surgery.

At present, the drive mode of the intracavity cutting stapler mainly has two modes: electric and manual. In this case, due to the large gripping force, the situation of hand shaking still exists, and the uniform and stable cutting effect cannot be achieved. The closing, opening, and advancing and retreating of the cutting blade are all driven by electric power, which simplifies the operation steps, makes the operation simple and labor-saving, has a uniform cutting speed, and stabilizes the forming of staples.

The electric stapler is equipped with a closing force feedback indication, but during the cutting process, you can only observe the cutting situation with the naked eye or judge the cutting force by the indication screen of the instrument, which cannot provide tactile feedback to the human body, so doctors cannot provide intuitive feedback for the selection of a cutting unit having the appropriate closed height.

How to design a cutting stapler that can provide tactile feedback is a technical problem to be solved by those skilled in the art.

The present invention provides a dual power intra-cavity cutting stapler that can be independently driven by a manual close handle to move the rack connection block and provide tactile feedback to the operator, and the specific technical solutions are as follows:
A dual power intracavity cutting stapler comprising:
a drive rack driven for translational movement by a drive;
A rack connection block slidably connected to the 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. a rack connection block connected to the
a manual close handle pivotably connected to the 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 is pivoted;

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

Preferably, the rack connection block is provided with a groove having a bottom opening in a lengthwise direction, and a ratchet pawl is rotatably arranged on the upper portion of the manual close handle, and the ratchet pawl is connected to the rack. Retractable within a recessed groove in the connecting block, the ratchet pawl drives the rack connecting block to move distally when the manual close handle is closed.

Preferably, the manual closing handle further includes a sliding key, and when the manual closing 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, and an escape pawl is hingedly connected to the tip of the sliding key body, and the escape pawl can reciprocate only to the proximal end side.

Preferably, the ratchet pawl is provided with an escape hole, and the escape pawl can protrude upward from the escape hole,
A torsion spring for pressing the ratchet pawl against the rack connection block is provided on the rotation shaft of the ratchet pawl,
The handle connecting shaft is provided with a torsion spring 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 slide key body, and the spring pin is held in the initial state by a compression spring provided within the slide key body.

Preferably, said sliding key body is slidable into said manual closing handle, and a bottom end of said sliding key body is provided with a lift spring,
Further comprising a close locking pin slidably disposed within the manual close handle, the close locking pin having a sliding direction perpendicular to the pivot plane of the manual close handle and pushing the slide key body downward. Drive to move to.

Preferably, said push rod is drivable to move a closing rod of said cutting unit, said closing rod being moved to a distal end and pressed against a wedge-shaped surface of said magazine to close said magazine.

The present invention provides a dual power intracavity cutting stapler, a drive rack translated by a drive, a rack connecting block slidably connected to the distal end of the drive rack, the rack connecting block fixed relative to the rack. and the drive rack can be driven to synchronously move the rack connection block, the distal end of the rack connection block is removably connected to the push rod, and the distal end of the push rod is connected to the cutting unit The rack connection block and the push rod move synchronously, the manual close handle is rotatably connected to the main body by the handle connection shaft, the manual close handle can rotate relative to the main body, and the manual close handle can rotate. When used, the operator operates the manual close handle, moves the rack connection block independently relative to the drive rack, and pulls the manual close handle. Squeezing and loosening achieves closing and opening of the jaws, and the closing force is directly fed back to the manual close handle to provide tactile feedback and guidance in the proper selection of the cutting unit.

In order to describe the embodiments of the present invention or the technical solutions of the prior art more clearly, the following briefly introduces the drawings required for the description of the embodiments or the prior art. Other drawings can be obtained based on these drawings, which are several embodiments of the invention, and which do not constitute an inventive step for those skilled in the art.
1 is an overall external view of a dual power intracavity cutting stapler of the present invention; FIG. It is an internal structure schematic diagram of a main-body part. FIG. 4 is a schematic diagram of the configuration of a manual close handle; FIG. 4 is a local configuration diagram where the rack connection block and the drive rack are engaged with each other; FIG. 11 is an exploded view of a second embodiment of the rack connecting block and drive rack; FIG. 11 is a perspective view of a second embodiment of a rack connecting block and drive rack; 1 is an overall configuration diagram of a sliding key; FIG. FIG. 4 is an exploded view of the sliding key; Fig. 2 is a diagram of two movement states of the sliding key; FIG. 4 is a perspective view of the ratchet pawl, slip key and close locking pin engaging each other; It is a cross-sectional configuration diagram of a manual close handle. FIG. 4 is a structural schematic diagram in which the position of the closing locking pin is restricted; FIG. 4 is a configuration diagram of an open state of the cutting unit when the stapler main body and the cutting unit are combined with each other; 5B is a local configuration diagram of the stapler main 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; FIG. FIG. 4 is a configuration diagram of a closed state of the cutting unit when the stapler main body and the cutting unit are combined with each other; 6B is a local configuration diagram of the stapler main 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; FIG.

SUMMARY OF THE INVENTION The present invention is centered on providing a dual power intracavity cutting stapler that can be independently driven by a manual close handle to move the rack connection block and provide tactile feedback to the operator.

For those skilled in the art to better understand the technical solution of the present invention, the following will combine the drawings and specific embodiments to introduce and describe the dual power intracavity cutting stapler of the present invention in detail.

As shown in FIG. 1, it is an overall external view of the dual power intra-cavity cutting stapler of the present invention, including a stapler body and a replaceable cutting unit, FIG. , a rack connecting block 2, a manual closing handle 3, etc., the driving rack 1 is translated by a driving device 4, the driving rack 1 and the driving device 4 are respectively mounted in the main body, and the driving device 4 is equipped with a deceleration motor. The drive rack 1 is guided by a slide rail provided inside the main body, and the drive rack 1 is moved by the drive device 4. It can slide back and forth along its length. Because the transmission ratio of the reduction motor is huge, the transmission ratio of the planetary gear reduction mechanism reaches more than 400, the internal resistance of the reduction motor is large, and when there is no electricity, the output end gear of the reduction motor is completely driven by the internal resistance. It may be considered locked, in which 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 with respect to the drive rack 1 within a certain range, and the moving direction of the rack connection block 2 and the drive The direction of movement of the rack 1 is similar, the distal end of the rack connection block 2 is detachably connected to a push rod 5, the distal end of which is provided with a cutting unit 6, the push rod 5 is When moved, it drives the cutting unit 6 .

In the medical device industry, the end that accurately grasps the instrument and is close to the grasping site is called the proximal end, and correspondingly, the end away from the grasping site is called the distal end. The right side of FIG. 1 is the proximal end and the left side is the distal end.

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

In use, the operator operates the manual close handle, moves the rack connection block independently with respect to the drive rack, squeezes and loosens the manual close handle to achieve closing and opening of the jaws, and the cutting unit. The bottom end of the manual close handle 3 is brought close to the main body when it needs to be closed, and the bottom end of the manual close handle 3 is moved away from the main body when the cutting unit is loosened. Within the range of movement of the rack connection block 2, the opening/closing of the cutting unit and the rotation of the manual close handle 3 remain synchronized, and the closing force is directly fed back to the manual close handle, providing tactile feedback. provide guidance on the proper selection for the cutting unit.

During the closing process of the magazine of the cutting unit, different thicknesses of the clamped tissue cause different resistances to the manual closing handle 3, and the magnitude of the resistance intuitively expresses the thickness of the clamped tissue. are doing. In a practical example, the thrust value is about 50-250N, within which range the choice of cutting unit is considered suitable for tissue closing thickness.

As shown in FIG. 2C, the rack connection block 2 and the drive rack 1 are engaged with each other, which is a local configuration diagram. At the extreme end of the connecting block 21 is provided a bulky structure that acts as a position limiter, and at the distal end of the drive rack 1 is provided a cavity, the opening size of which is smaller than the size of the inside, and the size of the cavity The length direction of the body 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 portion of the drive rack 1 is inserted into the cavity. and the range of movement of the rack connecting block 2 is determined by the engagement of the T-shaped connecting block 21 with 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 FIGS. 2D and 2E, which are an exploded view and a perspective view of the second embodiment of the rack connecting block and the driving rack, respectively. , one end of the rack connection block 2 is provided with a projection, the projection is provided with a waist-shaped hole, the length direction of the waist-shaped hole coincides with the length direction of the rack connection block 2, and one end of the drive rack 1 is is provided with a notch, the protrusion at the end of the rack connection block 2 is inserted into the drive rack 1, the drive rack 1 is fitted with a connection pin, the connection pin is inserted into the waist-shaped hole, and the drive rack 1 and the rack connection block 2 are movably connected, and the waist-shaped holes limit the sliding range of the rack connection block 2. , should fall within the protection scope of the present invention.

The rack connection block 2 is provided with a groove having a bottom opening in the length direction, and the tip of the manual close handle 3 enters the groove and engages with the rack connection block 2. Specifically, A ratchet pawl 33 is rotatably disposed on the upper portion of the manual closing handle 3, the rotation axis of the ratchet pawl 33 is at the proximal end, the distal end of the ratchet pawl 33 is movable, and the ratchet pawl 33 is a rack. The ratchet pawl 33 can be pushed into the recessed groove of the connecting block 2 and drives the rack connecting block 2 to move to the distal end when the manual close handle 3 is closed. 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 pawl 33 moves to the rack connection block. 2 to move toward the distal end.

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

As shown in FIGS. 3A to 3C , which are an overall configuration diagram, an exploded diagram and two moving state diagrams of the sliding key 34 respectively, specifically, the sliding key 34 includes a sliding key body 341 , which includes a sliding key body 341 . An escaping pawl 343 is hinge-connected to the tip, and the escaping pawl 343 reciprocates only to the proximal end side. 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 acts on the escape pawl 343 to the left. Force is applied, but escape pawl 343 is blocked and cannot move to the left, thereby driving rack connecting block 2 to move to the proximal end and retracting cutting unit 6 .

As shown in FIG. 4A, which is a perspective view of the ratchet pawl 33, the sliding key 34 and the close locking pin 32 engaged with each other, the ratchet pawl 33 is provided with an escape hole and the escape pawl 343 extends upward from the escape hole. A torsion spring is provided on the rotating 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 to give the manual close handle 3 a tendency to open. The manual closing handle 3 is automatically opened by 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 disposed in the tip inner chamber of the sliding key body 341, and the spring pin 344 slides inside the sliding key body 341. , the sliding direction coincides with the length direction of the slide key body 341, and the spring pin 344 is held in the initial state by the compression spring 345 provided in the slide key body 341. 3C, the spring pin 344 has a tendency to move up, thereby firmly abutting the relief pawl 343, holding the relief pawl 343 in an extended state, and rotating the relief pawl 343 to the right in FIG. 3C. After moving, it can still recover to its original position.

As shown in FIG. 4B, the sliding key body 341 is slidable within the manual closing handle 3, and the bottom end of the sliding key body 341 is provided with a lift spring 342, which causes the sliding key body 341 to move upward. By applying elasticity, the escape claw 343 is exposed upward.

Further includes a close locking pin 32 slidably disposed within the manual close handle 3, the close locking pin 32 can reciprocally slide in a guide groove in the manual close handle 3, and the sliding direction of the close locking pin 32 is manually controlled. Perpendicular to the pivot plane of the close handle 3, the close locking pin 32 can reciprocate along the direction of the arrow in the drawing, as shown in FIG. and pushes the close locking pin 32 from right to left, the close locking pin 32 drives the sliding key body 341 downward to compress the lift spring 342 and push the close locking pin 32 to the left. When pressed in the opposite direction from the right to the left, the sliding key body 341 moves upward by the elasticity of the lift spring 342, and at the same time, the manual closing handle 3 is automatically opened by the torsional elasticity.

Specifically, as shown in FIG. 3B, the side wall of the sliding key body 341 is provided with a protrusion, the protrusion is provided with a slope, and the closing locking pin 32 is laterally moved to be provided inside the housing of the housing body. After being inserted into the positioning concave groove provided, it is locked and drives the sliding key body 341 to move downward, and the sliding key body 341 compresses the lift spring 342 and retracts the escape pawl 343, in this case, the housing 4C, the position of the closing locking pin 32 is limited, so that the cutting unit 6 is in the original state. held in position.

Based on any one of the above technical solutions and their mutual combination, the distal end of the push rod 5 is detachably connected to the cutting unit 6, and as shown in FIGS. 5A and 6A, the stapler body and the cutting unit respectively 5B and 5C are local configuration diagrams of the stapler main body and the cutting unit, respectively, in the state corresponding to FIG. 5A. 6B and 6C are local configuration diagrams of a stapler main body and a cutting unit, respectively, in a state corresponding to FIG. 6A.

The magazine 62 is hinged by a rotating shaft, and the magazine 62 is provided with an elastic piece so that the magazine 62 can be kept open, and when the push rod 5 moves laterally, the closing rod of the cutting unit 6 is closed. 61 is moved, and a pressing piece Y is provided at the distal end of the closing rod 61. When the closing rod 61 moves toward the distal end, it is pressed against the wedge-shaped surface X of the magazine 62, thereby close.

In the dual power intracavity cutting stapler of the present invention, the closing and opening operations are manually operated by the cutting unit in a non-energized state, and both the closing and opening forces are intuitively expressed on the manual closing handle 3, To effectively solve the problem that the clamping force of a normal electric stapler is not intuitive. When power drive is required, the motor can laterally move the drive rack 1, and the drive rack 1 can also move the rack connection block 2, thereby realizing dual power drive.

The above description of the disclosed embodiments enables any person 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 can be implemented in other embodiments without departing from the spirit or scope of the invention. can. Accordingly, the present invention is not limited to those embodiments described herein, but is accorded the broadest scope consistent with the principles and novelty 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 pawl 34 ...Sliding key 341 ...Sliding key main body 342 ...Lift spring 343 ...Escape claw 344 ...Spring pin 345 ...Compression spring 4 ...Drive device 5 ...Push rod 6 ...・Cutting unit 61 ... closing rod 62 ... magazine

Claims (9)

a drive rack (1) driven for translational movement by a drive (4);
A rack connection block (2) slidably connected to the distal end of said drive rack (1), wherein the distal end of said rack connection block (2) is removably connected to a push rod (5). a rack connection block (2), wherein the distal end of said push rod (5) is connected to a cutting unit (6);
A manual close handle (3) rotatably connected to the main body by a handle connection shaft (31), wherein when the manual close handle (3) is rotated, the rack connection block (2) is moved to the drive rack ( A dual power intracavity cutting stapler, characterized in that it includes a manual close handle (3) that moves relative to 1). A T-shaped connection block (21) is projected from 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 of claim 1, wherein: The rack connection block (2) is provided with a concave groove having a bottom opening in the length direction, and a ratchet pawl (33) is rotatably arranged on the upper part of the manual close handle (3), The ratchet pawl (33) can be inserted into the groove of the rack connection block (2), and when the manual close handle (3) is closed, the ratchet pawl (33) moves into the rack connection block (2). ) to move distally. Said manual close handle (3) further comprises a sliding key (34), said sliding key (34) moves said rack connecting block (2) towards the proximal end when said manual closing handle (3) is opened. 4. The dual power intracavity cutting stapler of claim 3, wherein the dual power intracavity cutting stapler is driven to cause The sliding key (34) includes a sliding key body (341), and an escape claw (343) is hinge-connected to the tip of the sliding key body (341), and the escape claw (343) is provided only on the proximal end side. 5. The dual power intracavity cutting stapler of claim 4, wherein the dual power intracavity cutting stapler is reciprocally rotatable. An escape hole is provided in the ratchet pawl (33), and the escape pawl (343) can protrude upward from the escape hole,
The rotating shaft of the ratchet pawl (33) is provided with a torsion spring that presses the ratchet pawl (33) against the rack connection block (2),
Dual power intracavity cutting stapler according to claim 5, characterized in that the handle connecting shaft (31) is provided with a torsion spring to make the manual closing handle (3) tend to open. A spring pin (344) is slidably disposed in the inner chamber at the tip of the slide key body (341), and the spring pin (344) is a compression spring ( 345) is held in an initial state by the dual power intracavity cutting stapler of claim 6. said sliding key body (341) is slidable into said manual closing handle (3), the bottom end of said sliding key body (341) is provided with a lift spring (342),
Further comprising a close locking pin (32) slidably disposed within the manual close handle (3), the sliding direction of the close locking pin (32) being the pivot plane of the manual close handle (3). 8. The dual power intracavity cutting stapler according to claim 7, characterized in that it is actuated to move said sliding key body (341) downward. Said push rod (5) is drivable to move a closing rod (61) in said cutting unit (6), said closing rod (61) moving towards the distal end to open a magazine (62). A dual power intracavity cutting stapler according to any one of claims 1 to 8, characterized in that the magazine (62) is closed by being pressed against a wedge-shaped surface of the.

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