CN113855128A - Operation stitching instrument driving device - Google Patents
Operation stitching instrument driving device Download PDFInfo
- Publication number
- CN113855128A CN113855128A CN202111134241.1A CN202111134241A CN113855128A CN 113855128 A CN113855128 A CN 113855128A CN 202111134241 A CN202111134241 A CN 202111134241A CN 113855128 A CN113855128 A CN 113855128A
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- cam
- push rod
- trigger
- pawl
- spring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/062—Needle manipulators
- A61B17/0625—Needle manipulators the needle being specially adapted to interact with the manipulator, e.g. being ridged to snap fit in a hole of the manipulator
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The present invention provides a surgical stapler driving device, including: ratchet mechanism, cam mechanism, drive gear, first push rod, second push rod, trigger, casing, spacing subassembly and spring assembly. The first push rod and the second push rod are controlled to do linear motion simultaneously, and only one hand is needed to operate, so that inconvenience in operation when two hands operate is avoided; the invention also drives the first push rod and the second push rod through the ratchet wheel-cam mechanism, and the shape of the cam is designed to ensure that one step in the suture operation is completed by pulling the trigger once, and the whole suture operation can be completed only by pulling the trigger, thereby being convenient for operation; the first cam and the second cam are both arranged on the output gear, and the first cam and the second cam are combined into one part, so that the number of parts is reduced, and the volume of the device is reduced.
Description
Technical Field
The invention relates to the field of surgical instruments, in particular to a surgical stitching instrument driving device.
Background
The surgical suture instrument is a device used in medicine for replacing traditional manual suture and generally has a double-needle structure, the existing surgical suture instrument with the double-needle structure adopts two sets of driving devices to respectively drive two suture needles, two hands are required to operate, and the two hands can generate interference when the two hands operate; in each suturing process in the suturing operation, two sets of driving devices need to be operated respectively to drive two suturing needles to move so as to complete the suturing process, and the operation is complex.
Disclosure of Invention
The present invention has been made to solve the above problems, and provides a surgical stapler driving device.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a surgical stapler drive device, comprising: the device comprises a ratchet mechanism, a cam mechanism, a transmission gear, a first push rod, a second push rod, a trigger, a shell, a limiting assembly and a spring assembly;
the cam mechanism comprises an output gear, a first cam for driving the first push rod and a second cam for driving the second push rod; the first cam and the second cam are respectively groove-shaped cams which are arranged on two end faces of the output gear and have the same structure, one end of the first push rod is arranged in the groove of the first cam, and one end of the second push rod is arranged in the groove of the second cam;
the ratchet mechanism comprises a ratchet wheel and a first pawl used for driving the ratchet wheel to rotate, one end of the first pawl is hinged with the trigger, and the other end of the first pawl is abutted against the ratchet wheel;
the ratchet wheel and the transmission gear are sleeved on the connecting shaft, and the transmission gear is meshed with the output gear;
the spring assembly includes a first spring for resetting the trigger and a second spring for abutting the first pawl against the ratchet; two ends of the first spring are respectively connected with the trigger and the shell, and two ends of the second spring are respectively abutted with the first pawl and the trigger;
the limiting assembly comprises a first guide block for guiding the first push rod to perform linear motion and a second guide block for guiding the second push rod to perform linear motion; the first guide block and the second guide block are fixedly connected with the shell.
Preferably, a first guide hole matched with the first push rod is formed in the first guide block, the first push rod passes through the first guide hole, a second guide hole matched with the second push rod is formed in the second guide block, and the second push rod passes through the second guide hole.
Preferably, the first push rod and the second push rod are respectively sleeved with rolling bearings matched with the groove-shaped cams.
Preferably, the ratchet mechanism further comprises a second pawl for preventing reverse rotation of the ratchet wheel, and the spring mechanism further comprises a third spring for abutting the second pawl against the ratchet wheel; one end of the second pawl is hinged to the shell, the other end of the second pawl is abutted to the ratchet wheel, and two ends of the third spring are connected with the second pawl and the shell respectively.
Preferably, the rotation process of the first cam or the second cam has four stages, namely a push stroke stage, a long distance stage, a return stroke stage and a short distance stage; when the first cam or the second cam is in a long-distance stage, the first push rod or the second push rod is kept in a push-out state, when the first cam or the second cam is in a return-stroke stage, the first push rod or the second push rod is withdrawn into the shell, and when the first cam or the second cam is in a short-distance stage, the first push rod or the second push rod is kept in a withdrawing state.
Preferably, the rotation of the first cam and the second cam are in different stages.
Preferably, the rotations of the first cam and the second cam have a phase difference of 90 °.
Preferably, a stroke slot matched with the trigger is formed in the shell, when the trigger is pulled, the trigger moves along the stroke slot, and the stroke slot is used for limiting the pulling distance of the trigger.
Preferably, the housing is provided with a grip structure for support when the trigger is actuated.
The invention can obtain the following technical effects:
(1) the first push rod and the second push rod are controlled to do linear motion at the same time, and only one hand is needed to operate, so that inconvenience in operation when two hands operate is avoided;
(2) the first push rod and the second push rod are driven by the ratchet wheel-cam mechanism, the shape of the cam is designed, so that one step in the suture operation can be completed by pulling the trigger once, the whole suture operation can be completed by pulling the trigger, and the operation is convenient.
(3) The first cam and the second cam are both arranged on the output gear, and are combined into one part, so that the number of parts is reduced, and the size of the device is reduced.
(4) By changing the profile and size of the cam, the push-out length of the push rod can be changed.
Drawings
FIG. 1 is an isometric view of the internal structure of a surgical stapler drive device, according to an embodiment of the invention;
FIG. 2 is an elevational view of the internal structure of a surgical stapler drive device according to an embodiment of the invention;
FIG. 3 is a rear view of the internal structure of a surgical stapler drive device according to an embodiment of the invention;
FIG. 4 is a bottom view of the internal structure of a surgical stapler drive device, in accordance with an embodiment of the invention.
Wherein the reference numerals include: the ratchet mechanism 1, the cam mechanism 2, the transmission gear 3, the first push rod 4, the second push rod 5, the trigger 6, the shell 7, the limiting component 8, the spring component 9, the connecting shaft 10, the ratchet 1-1, the first pawl 1-2, the first cam 2-1, the second cam 2-2, the grip structure 7-1, the first spring 9-1 and the second spring 9-2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, a surgical stapler driving device according to an embodiment of the present invention includes: the device comprises a ratchet mechanism 1, a cam mechanism 2, a transmission gear 3, a first push rod 4, a second push rod 5, a trigger 6, a shell 7, a limiting assembly 8 and a spring assembly 9;
one end of the first push rod 4 is connected with a first suture needle, one end of the second push rod 5 is connected with a second suture needle, and the first suture needle or the second suture needle is pushed out and retracted through the linear motion of the first push rod 4 or the second push rod 5; when the suture needle is replaced, the suture needle connected with the first push rod 4 or the second push rod 5 can be directly replaced without changing the driving device.
The cam mechanism 2 comprises an output gear, a first cam 2-1 for driving a first push rod 4 and a second cam 2-2 for driving a second push rod 5; the first cam 2-1 and the second cam 2-2 are respectively groove cams with the same structure and arranged on two end faces of the output gear, one end of a first push rod 4 is arranged in a groove of the first cam 2-1, the first cam 2-1 rotates to drive the first push rod 4 to reciprocate, one end of a second push rod 5 is arranged in a groove of the second cam 2-2, and the second cam 2-2 rotates to drive the second push rod 5 to reciprocate.
The ratchet mechanism 1 comprises a ratchet wheel 1-1 and a first pawl 1-2 for driving the ratchet wheel 1-1 to rotate; one end of the first pawl 1-2 is hinged with the trigger 6, and the other end of the first pawl 1-2 is abutted with the ratchet wheel 1-1; when the trigger 6 is pulled, the trigger 6 drives the first pawl 1-2 to move, and further drives the ratchet 1-1 to rotate.
The ratchet 1-1 and the transmission gear 3 are sleeved on the connecting shaft 10, and when the ratchet 1-1 rotates, the connecting shaft 10 is driven to rotate, and then the transmission gear 3 is driven to rotate; the transmission gear 3 is meshed with the output gear, and the rotation of the ratchet wheel 1-1 is transmitted to the output gear through the transmission gear 3; in this embodiment, the transmission coefficient between the transmission gear 3 and the output gear is designed so that the output gear rotates 90 ° each time the trigger 6 is pulled.
The spring assembly 9 comprises a first spring 9-1 for resetting the trigger 6 and a second spring 9-2 for abutting the first pawl 1-2 against the ratchet 1-1; the two ends of the first spring 9-1 are respectively connected with the trigger 6 and the shell 7, and after the trigger 6 is pulled and released, the first spring 9-1 resets the trigger 6 to enable the trigger 6 to return to the position before being pulled; two ends of the second spring 9-2 are respectively abutted with the first pawl 1-2 and the trigger 6, and the second spring 9-2 applies thrust to the part of the first pawl 1-2 connected with the trigger 6, so that the claw tip of the first pawl 1-2 is always abutted with the ratchet 1-1.
The limiting assembly 8 comprises a first guide block for guiding the first push rod 4 to perform linear motion and a second guide block for guiding the second push rod 5 to perform linear motion; the first guide block and the second guide block are both fixedly connected with the housing 7.
In one embodiment of the invention, a first guide hole matched with the first push rod 4 is formed in the first guide block, the first push rod 4 passes through the first guide hole, a second guide hole matched with the second push rod 5 is formed in the second guide block, and the second push rod 5 passes through the second guide hole; the motion of the push rod is guided through the guide hole, so that the push rod moves linearly.
In one embodiment of the invention, the first push rod 4 and the second push rod 5 are respectively sleeved with rolling bearings matched with the groove-shaped cams; the abutting joint of the first push rod 4 and the first cam 2-1 and the abutting joint of the second push rod 5 and the second cam 2-2 are ensured through the matching of the groove-shaped cam and the rolling bearing, the relative movement between the first push rod 4 and the first cam 2-1 and between the second push rod 5 and the second cam 2-2 is smoother through the rolling bearing, and the blocking during the movement process is prevented.
In one embodiment of the invention, the ratchet mechanism 1 further comprises a second pawl for preventing the ratchet 1-1 from reversing, and the spring assembly 9 further comprises a third spring for abutting the second pawl against the ratchet 1-1; one end of the second pawl is rotatably connected with the shell 7, the other end of the second pawl is abutted with the ratchet wheel 1-1, and two ends of the third spring are respectively abutted with the second pawl and the shell 7; after the trigger 6 is pulled and released, the trigger 6 drives the first pawl 1-2 to move reversely, the ratchet 1-1 rotates reversely probably due to the friction force between the first pawl 1-2 and the ratchet 1-1, and the second pawl is always abutted against the ratchet 1-1 through the third spring, so that the ratchet 1-1 is prevented from rotating reversely.
In one embodiment of the present invention, the rotation process of the first cam 2-1 or the second cam 2-2 has four stages, which are a push stage, a long-distance stage, a return stage, and a short-distance stage, respectively; when the first cam 2-1 or the second cam 2-2 is in a pushing range stage, the first push rod 4 or the second push rod 5 is pushed out of the shell 7, when the first cam 2-1 or the second cam 2-2 is in a long distance stage, the first push rod 4 or the second push rod 5 is kept in a pushing state, when the first cam 2-1 or the second cam 2-2 is in a return range stage, the first push rod 4 or the second push rod 5 is retracted into the shell 7, and when the first cam 2-1 or the second cam 2-2 is in a short distance stage, the first push rod 4 or the second push rod 5 is kept in a retracting state; the first push rod 4 and the second push rod 5 are linearly moved along with the rotation of the first cam 2-1 and the second cam 2-2 through four stages, and each stage corresponds to 90 degrees of cam rotation for ensuring that each time the trigger 6 is pulled to complete one stage, and each time the trigger 6 is pulled to rotate the cam by 90 degrees.
In one embodiment of the invention, the rotation of the first cam 2-1 and the second cam 2-2 is always in different rotation phases, so that the first push rod 4 and the second push rod 5 are in different states; in the present embodiment, the first cam 2-1 is advanced one stage ahead of the second cam 2-2.
In one embodiment of the present invention, the rotations of the first cam 2-1 and the second cam 2-2 have a phase difference of 90 ° so that the first cam 2-1 and the second cam 2-2 are different by one stage.
In one embodiment of the invention, a stroke slot matched with the trigger 6 is formed on the shell 7, when the trigger 6 is pulled, the trigger 6 moves along the stroke slot, and the stroke slot is used for limiting the pulling distance of the trigger 6; the rotation angle of the ratchet 1-1 is limited every time the trigger 6 is pulled by limiting the pulling distance of the trigger 6.
As shown in FIG. 4, in one embodiment of the present invention, the housing 7 is provided with a grip structure 7-1, and the grip structure 7-1 is used for supporting when the trigger 6 is pulled, preventing the trigger 6 from being pulled without a supporting position.
The specific operation of the present invention will be described in detail with reference to fig. 1 to 3:
each time the trigger 6 is pulled, the ratchet wheel 1-1 rotates to drive the first cam 2-1 and the second cam 2-2 to rotate for 90 degrees; initially, the first push rod 4 and the second push rod 5 are both in a retraction state, the connecting part of the first push rod 4 and the first cam 2-1 is the starting point of a push stroke stage, and the connecting part of the second push rod 5 and the second cam 2-2 is the starting point of a short-distance stage; the trigger 6 is pulled for the first time, the first push rod 4 is pushed out by the first cam 2-1 through a pushing range stage, the second push rod 5 is kept in a withdrawing state by the second cam 2-2 through a short distance stage, and the trigger 6 is pulled for the second time; the trigger 6 is pulled for the second time, the first push rod 4 is kept in a push-out state after the first cam 2-1 passes through a long distance stage, and the second push rod 5 is pushed out after the second cam 2-2 passes through a push stroke stage; the trigger 6 is pulled for the third time, the first push rod 4 is retracted after the first cam 2-1 passes through the return stroke stage, and the second push rod 5 is kept in a push-out state after the second cam 2-2 passes through the long distance stage; the trigger 6 is pulled for the fourth time, the first push rod 4 is kept in a withdrawing state after the first cam 2-1 passes through a short distance stage, and the second push rod 5 is withdrawn after the second cam 2-2 passes through a return stroke stage;
initially, the first suture needle and the second suture needle are both in a retraction state, four stages of suturing are completed by pulling the trigger 6 for four times, namely pushing out the first suture needle, pushing out the second suture needle, retracting the first suture needle and retracting the second suture needle, so that the suturing operation is completed.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A surgical stapler drive device, comprising: the device comprises a ratchet mechanism, a cam mechanism, a transmission gear, a first push rod, a second push rod, a trigger, a shell, a limiting assembly and a spring assembly;
the cam mechanism comprises an output gear, a first cam for driving the first push rod and a second cam for driving the second push rod; the first cam and the second cam are respectively groove-shaped cams which are arranged on two end faces of the output gear and have the same structure, one end of the first push rod is arranged in the groove of the first cam, and one end of the second push rod is arranged in the groove of the second cam;
the ratchet mechanism comprises a ratchet wheel and a first pawl used for driving the ratchet wheel to rotate, one end of the first pawl is hinged with the trigger, and the other end of the first pawl is abutted to the ratchet wheel;
the ratchet wheel and the transmission gear are sleeved on the connecting shaft, and the transmission gear is meshed with the output gear;
the spring assembly includes a first spring for resetting the trigger and a second spring for abutting the first pawl against the ratchet; two ends of the first spring are respectively connected with the trigger and the shell, and two ends of the second spring are respectively abutted with the first pawl and the trigger;
the limiting assembly comprises a first guide block for guiding the first push rod to perform linear motion and a second guide block for guiding the second push rod to perform linear motion; the first guide block and the second guide block are fixedly connected with the shell.
2. The surgical stapler driving device according to claim 1, wherein a first guide hole adapted to the first push rod is opened in the first guide block, the first push rod passes through the first guide hole, a second guide hole adapted to the second push rod is opened in the second guide block, and the second push rod passes through the second guide hole.
3. The surgical stapler driving device according to claim 1, wherein rolling bearings engaged with the grooved cams are respectively fitted on the first push rod and the second push rod.
4. The surgical stapler drive device of claim 1, wherein the ratchet mechanism further includes a second pawl for preventing reverse rotation of the ratchet, the spring mechanism further including a third spring for abutting the second pawl against the ratchet; one end of the second pawl is hinged to the shell, the other end of the second pawl is abutted to the ratchet wheel, and two ends of the third spring are connected with the second pawl and the shell respectively.
5. The surgical stapler drive device of claim 1, wherein the rotation process of the first cam or the second cam has four stages, a push stage, a long-throw stage, a return stage, and a short-throw stage; when the first cam or the second cam is in a pushing range stage, the first push rod or the second push rod is pushed out of the shell, when the first cam or the second cam is in a long range stage, the first push rod or the second push rod keeps in a pushing state, when the first cam or the second cam is in a return range stage, the first push rod or the second push rod is retracted into the shell, and when the first cam or the second cam is in a short range stage, the first push rod or the second push rod keeps in a retracting state.
6. The surgical stapler drive device of claim 5, wherein the rotation of the first cam and the second cam are at different stages.
7. The surgical stapler drive device of claim 6, wherein the rotations of the first cam and the second cam are 90 ° out of phase.
8. The surgical stapler driving device according to claim 1, wherein a stroke slot adapted to the trigger is formed in the housing, and the trigger moves along the stroke slot when the trigger is actuated, and the stroke slot is used to limit a distance of the actuation of the trigger.
9. The surgical stapler drive device of claim 1, wherein the housing is provided with a grip structure for support when the trigger is actuated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134241.1A CN113855128A (en) | 2021-09-27 | 2021-09-27 | Operation stitching instrument driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134241.1A CN113855128A (en) | 2021-09-27 | 2021-09-27 | Operation stitching instrument driving device |
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| Publication Number | Publication Date |
|---|---|
| CN113855128A true CN113855128A (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111134241.1A Pending CN113855128A (en) | 2021-09-27 | 2021-09-27 | Operation stitching instrument driving device |
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| CN (1) | CN113855128A (en) |
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