CN218094137U

CN218094137U - Support spacing subassembly suitable for surgical instruments actuating mechanism

Info

Publication number: CN218094137U
Application number: CN202222545936.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Weijing Medical Robot Co ltd
Current assignee: Hangzhou Weijing Medical Robot Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-20
Anticipated expiration: 2032-09-26

Abstract

The utility model discloses a support spacing subassembly suitable for surgical instruments actuating mechanism, include: the mounting base is convexly arranged on the top end face of the bottom plate; the mounting seat is provided with an accommodating cavity for accommodating an opening and closing gear of the surgical instrument driving mechanism, and a gap groove communicated with the accommodating cavity is prefabricated on the side wall of the mounting seat. The utility model discloses overall structure can be simplified and the accuracy of reduce cost and improvement structure is come.

Description

Support limiting assembly suitable for surgical instrument driving mechanism

Technical Field

The utility model relates to the technical field of medical equipment, specifically a support spacing subassembly suitable for surgical instruments actuating mechanism.

Background

In robotic-assisted minimally invasive surgical procedures, a dedicated channel is typically established through a cannula into which a surgeon performs surgical tasks within the abdominal cavity of the body with the aid of elongated minimally invasive surgical instruments. On the basis, for minimally invasive surgical instruments actually performing operations, such as, but not limited to, forceps or a scalpel, in order to achieve flexible and precise operations in vivo, it is generally required to configure corresponding driving mechanisms for driving the instruments to move outside the body to achieve specific surgical operations, particularly during the operations.

For example, patent publication No. CN114469268A discloses a surgical instrument driving mechanism, which specifically includes an adapter for coupling a surgical instrument, a rotating mechanism for driving the adapter to rotate, and a lever for lifting the adapter, wherein the adapter, the rotating mechanism and the lever are installed between a bottom plate and an upper mounting plate, which are used in cooperation, i.e. the stability of the structure of the adapter, the rotating mechanism and the lever in the using process is realized through the cooperation of the bottom plate and the upper mounting plate, so as to ensure the smooth operation of the adapter, the rotating mechanism and the lever.

However, it has been found in practice that the above-mentioned surgical instrument driving mechanism, while enabling the driving of the operation of the surgical instrument, may inevitably have the following drawbacks:

firstly, go up the mounting panel owing to receive the power of lever pivot department of lever subassembly, under the limited and unable prerequisite that improves mounting panel structural strength through the increase of thickness of structure size, go up the mounting panel because above-mentioned atress factor can produce the deformation to influence the mounting panel and directly influence the stability in use and the transmission precision of other structures rather than linking firmly.

Generally speaking, for a driving structure of a minimally invasive surgical instrument, the requirement on the accuracy of the whole structure is high, because deviation of surgical operation caused by structural errors existing in the driving mechanism is required to be avoided, and cumulative effects exist between errors of production, processing and assembly of any structure from the processing technology and the assembly technology, so that the reliability and accuracy of the whole structure are difficult to guarantee due to the fact that the number of parts is large and the possible production errors and assembly errors are larger for the driving structure of the minimally invasive surgical instrument, therefore, on one hand, considering for reducing the cost and on the other hand, considering for improving the structural reliability and accuracy, the direction of research and development of efforts is directed to simplify the structure as much as possible to achieve the required functions.

In addition, the lever is directly fixed on the upper mounting plate through the conventional rotating shaft, so that a gap is difficult to avoid between the rotating shaft and the shaft hole, and the existence of the gap further influences the transmission precision of the whole driving mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a support spacing subassembly suitable for surgical instruments actuating mechanism to solve the technical effect of simplifying overall structure with reduce cost and improvement structural accuracy.

The utility model discloses a spacing subassembly of support suitable for surgical instruments actuating mechanism realizes like this:

a support and limit assembly adapted for use with a surgical instrument drive mechanism, comprising: the mounting base is convexly arranged on the top end face of the bottom plate; wherein

The mounting seat is provided with an accommodating cavity for accommodating an opening and closing gear of the surgical instrument driving mechanism, and a notch groove communicated with the accommodating cavity is prefabricated on the side wall of the mounting seat.

In an optional embodiment of the present invention, guard plates protruding toward the support seat are respectively formed in the notch groove by extending along the two axial side edges of the opening and closing gear; and

a pair of said guards is adapted to form a clearance fit with the teeth of the lever.

In an alternative embodiment of the present invention, the mounting seat is engaged with the opening/closing gear.

In an optional embodiment of the present invention, the opening and closing gear includes a cylindrical gear body located in the accommodating cavity and a first jag bolt formed at one of shaft ends of the cylindrical gear body; and

the top end part of the mounting seat, which is far away from the bottom plate, is provided with an opening which is communicated with the accommodating cavity and is suitable for the first forking bolt to penetrate out.

In an optional embodiment of the present invention, a limiting portion having an inner diameter smaller than that of the accommodating cavity is integrally formed at a top end of the mounting seat away from the bottom plate; the limiting part is provided with a limiting cavity communicated with the accommodating cavity and the opening;

an L-shaped joint surface is formed between the limiting cavity and the accommodating cavity.

In an optional embodiment of the present invention, the first split lock tongue includes a cylindrical connecting portion integrally connected to the cylindrical gear body and having an outer diameter smaller than that of the cylindrical gear body, a plurality of axial notches formed at intervals in the cylindrical connecting portion, and a tapered head formed at an end of the cylindrical connecting portion away from the cylindrical gear body;

the outer diameter of the conical bottom surface of the conical head is larger than that of the columnar connecting part;

the columnar connecting part is suitable for being in clearance fit with the limiting cavity; and the conical bottom surface of the conical head is pressed against the opening, and the columnar gear body is abutted against the L-shaped engagement surface towards the shaft end of the first split lock tongue.

In an optional embodiment of the present invention, a first mounting cavity and a second mounting cavity which are used in cooperation are further formed inside the bottom plate; wherein

The first mounting cavity is used for assembling a tooth-shaped part of a cutter bar of a surgical instrument driving mechanism, and the second mounting cavity is used for assembling a rotary gear which is meshed and matched with the tooth-shaped part.

In an alternative embodiment of the present invention, the rotary gear is fixed to the second mounting cavity in a clamping manner.

In an optional embodiment of the present invention, a second split lock tongue engaged with the second mounting cavity is integrally formed on the rotary gear.

A support and limit assembly adapted for use with a surgical instrument drive mechanism, comprising: the supporting seat is convexly arranged on the top end face of the bottom plate; wherein

A transverse shaft hole and a longitudinal limiting hole which are vertically distributed are formed in the supporting seat; the transverse shaft hole is used for supporting a rotating shaft connected with a lever of the surgical instrument driving mechanism, and the longitudinal limiting hole is used for accommodating an elastic piece of which one end is suitable for abutting against the rotating shaft.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a spacing subassembly of support suitable for surgical instruments actuating mechanism to mount pad and supporting seat, can directly realize the support to opening and shutting gear and lever, and no longer need the last mounting panel that adopts among the prior art, so under the structure, reduced the use of last mounting panel, simplified overall structure, can reduce the cost of production and processing and assembly in step.

Furthermore, compared with the prior art that the fixed structure of the opening and closing gear is realized by the upper mounting plate and the bottom plate together, the opening and closing gear is directly fixed on the bottom plate in the application of the scheme, the application of the scheme can not only avoid the problem of poor accuracy caused by the matching error between multiple parts, but also greatly reduce the processing difficulty, and for the structure that the upper mounting plate is used for fixing the opening and closing gear and the rotating gear simultaneously, the processing precision of the mounting holes in the upper mounting plate needs to be strictly ensured, so that the two mounting holes can be matched with the opening and closing gear and the rotating gear accurately, and the opening and closing gear and the rotating gear in the application of the scheme can be fixed with the bottom plate respectively, so that the mounting difficulty can be reduced. Moreover, the application has cancelled the use of going up the mounting panel for on the basis of equivalent structure size, the present application can increase whole bottom plate thickness, thereby can reduce the probability that the bottom plate warp, and then improves overall structure's stability and holistic life.

In addition, further set up vertical spacing hole on the supporting seat and be used for holding the elastic component that one end is suitable for the butt pivot, under such structure, eliminate the clearance between pivot and the horizontal shaft hole through the elastic component to the effect of propping up of pivot, further guaranteed transmission precision.

Drawings

Fig. 1 is a first view overall view of a support and limit assembly of the present invention, which is suitable for use in a surgical instrument driving mechanism;

FIG. 2 is a second perspective overall view of the support and position limiting assembly of the present invention adapted for use with a surgical instrument drive mechanism;

fig. 3 is an overall structural view of a third view angle of the supporting and limiting assembly of the driving mechanism of the surgical instrument according to the present invention;

FIG. 4 is an exploded view of the support and stop assembly of the present invention adapted for use with a surgical instrument drive mechanism;

FIG. 5 is a schematic diagram of the mounting seat and the supporting seat of the supporting and limiting assembly of the present invention for use in a driving mechanism of a surgical instrument;

fig. 6 is a partial structural schematic view of a support limit assembly of the present invention, which is suitable for a driving mechanism of a surgical instrument;

FIG. 7 is a schematic sectional view taken along line B of FIG. 6;

fig. 8 is a partial schematic structural view of a second supporting and limiting assembly of the present invention, which is suitable for use in a driving mechanism of a surgical instrument;

FIG. 9 is a schematic cross-sectional view taken along line D of FIG. 8;

FIG. 10 is a schematic cross-sectional view taken along line C of FIG. 8;

fig. 11 is a schematic structural view of the opening and closing gear adapted to be used with the supporting and limiting assembly of the driving mechanism of the surgical instrument according to the present invention;

FIG. 12 is a schematic structural view of a rotary gear adapted for use with a support and limit assembly of a surgical instrument drive mechanism according to the present invention;

fig. 13 is a schematic structural view of a code member of the present invention adapted for use with a support and limit assembly of a surgical instrument driving mechanism;

fig. 14 is a schematic structural diagram of a support rod adapted for use with the support limiting assembly of the driving mechanism of the surgical instrument according to the present invention.

Reference numbers in the figures: the bottom plate 100, the lightening groove 101, the mounting seat 200, the receiving cavity 201, the limiting part 202, the limiting cavity 203, the opening 205, the L-shaped engagement surface 206, the notch groove 207, the guard plate 208, the support seat 300, the transverse shaft hole 301, the longitudinal limiting hole 302, the opening and closing gear 400, the cylindrical gear body 401, the cylindrical connecting part 402, the axial notch groove 403, the conical head 404, the spring 501, the rotating shaft 502, the lever 600, the tooth part 601, the first mounting cavity 701, the second mounting cavity 702, the cutter bar 801, the rotating gear 802, the second forking latch tongue 803, the code seat 901, the indicator seat 902, the indicator light 903, the code piece 904, the support bar hole 9041, the rib groove 9042, the baffle 9043, the blocking tooth 9045, the support bar 905, the rib 9051 and the clamp spring groove 9053.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1 to 14, the present invention provides a supporting and limiting assembly suitable for a driving mechanism of a surgical instrument, where the corresponding surgical instrument can be a forceps or a scalpel, that is, any instrument that needs linear rotation and opening and closing movement in a surgical procedure can adopt the structure of the present embodiment, and the present embodiment is not limited to specific surgical instruments.

The spacing subassembly of support that this embodiment adopted includes: a base plate 100, and a mounting seat 200 and a support seat 300 protrudingly provided on a top end surface of the base plate 100. The mounting seat 200 and the supporting seat 300 may be directly formed integrally with the bottom plate 100, and may also be fixed on the bottom plate 100 by using additional riveting or screw fastening, that is, the use requirement of the embodiment is met as long as the mounting seat 200 and the supporting seat 300 are firmly supported and fixed on the bottom plate 100. The support base 300 is used for supporting a rotating shaft 502 connected with a lever 600 of a surgical instrument driving mechanism.

Referring next specifically to the drawings, mount 200 is first:

in terms of layout position, the mount 200 is located at one corner of the base plate 100 so that the arrangement of the mount 200 does not affect the layout of the lever 600 on the base plate 100. The overall shape of the mount 200 is a columnar structure, and the cross section of the external shape of the mount 200 may be circular or elliptical, or rectangular, or irregular in a top view of the bottom plate 100, which is not limited in this embodiment. In order to make the mounting base 200 of the present embodiment capable of being used to accommodate the opening and closing gear 400 of the surgical instrument driving mechanism, the mounting base 200 has an accommodating cavity 201 for accommodating the opening and closing gear 400 of the surgical instrument driving mechanism, and the cross section of the accommodating cavity 201 may be circular or rectangular when viewed from the top of the bottom plate 100, that is, the use requirement of the present embodiment can be satisfied as long as the opening and closing gear 400 can smoothly rotate in the accommodating cavity 201. The drawings of the present embodiment merely exemplify a structure in which the entire mount 200 is cylindrical.

In addition to the above structure, the opening and closing gear 400 is engaged with the mounting base 200 by the following structure:

generally speaking, the mounting base 200 is snap-fitted with the retractable gear 400, and the snap-fitting structure does not require auxiliary tools to complete the mounting.

In detail, the opening and closing gear 400 includes an integrally formed cylindrical gear body 401 and a first forking latch at one of the shaft ends of the cylindrical gear body 401; after the opening and closing gear 400 is assembled with the mount 200 in place, the cylindrical gear body 401 is integrally received in the receiving cavity 201 of the mount 200.

Furthermore, the first split bolt comprises a cylindrical connecting part 402 integrally connected with the cylindrical gear body 401, a plurality of axial notches 403 formed at intervals on the cylindrical connecting part 402, and a conical head 404 formed at one end of the cylindrical connecting part 402 far away from the cylindrical gear body 401; the cylindrical connecting portion 402 has a smaller outer diameter than the cylindrical gear body 401, and the axial groove 403 extends to the conical head 404. Here, the outer diameter of the tapered bottom surface of the tapered head 404 is larger than the outer diameter of the columnar connection portion 402.

Based on the cooperation of the first forking latch, an opening 205 suitable for the first forking latch to pass through is formed at the top end of the mounting base 200 far away from the bottom plate 100 and communicated with the accommodating cavity 201. More specifically, a limiting portion 202 is integrally formed on the top end of the mounting seat 200 away from the bottom plate 100; the limiting part 202 is provided with a limiting cavity 203 communicated with the containing cavity 201 and the opening 205; the inner diameter of the limit cavity 203 is smaller than that of the receiving cavity 201, so that an L-shaped engagement surface 206 is formed between the limit cavity 203 and the receiving cavity 201.

In this regard, when the retractable gear 400 is mated with the mounting base 200, the pillar-shaped connecting portion 402 is adapted to be in clearance fit with the spacing cavity 203; and the conical bottom surface of the conical head 404 is pressed against the opening 205, and the shaft end of the cylindrical gear body 401 facing the first forking bolt is pressed against the L-shaped engagement surface 206. With such a structure, when the opening and closing gear 400 and the mounting seat 200 are assembled, the first forking latch bolt only needs to use the axial notch 403 to enable the conical head 404 of the first forking latch bolt to slightly deform to pass through the limiting cavity 203, and after the conical head 404 extends out of the opening 205 and then returns to a normal state, the conical bottom surface of the conical head 404 can be pressed against the opening 205, so that the opening and closing gear 400 and the mounting seat 200 are assembled in place. It should be noted here that the opening and closing gear 400 is an integral plastic structure, and after being assembled with the mounting seat 200 in place, a few wires of moving space exist between the opening and closing gear 400 and the bottom plate 100, so that the opening and closing gear 400 can rotate smoothly without worrying about the adverse effect of friction.

With the above structure, the integral opening and closing gear 400 is fitted in the receiving cavity 201 of the mounting base 200, and for this, in order to make the opening and closing gear 400 fit with the tooth part 601 of the lever 600, the present embodiment is pre-formed with a notch groove 207 communicating with the receiving cavity 201 in the side wall of the mounting base 200, so that the tooth part 601 of the lever 600 can fit with the opening and closing gear 400 through the notch groove 207.

Based on the design of the notch groove 207, the present embodiment is further modified as follows: guard plates 208 protruding toward the support base 300 are respectively formed on both side edges of the notch groove 207 in the axial direction of the opening and closing gear 400 in an extending manner; and a pair of guard plates 208 formed at both side edges of the notch groove 207 are adapted to form a clearance fit with the tooth portions 601 of the lever 600. The pair of protection plates 208 can limit the tooth part 601 of the lever 600, so that the motion track of the lever 600 under the action of the opening and closing gear 400 is limited by the pair of protection plates 208, thereby ensuring the precision of the motion track of the lever 600; and the guard plate 208 can also play a role in reinforcing the installation seat 200 so as to ensure the use strength of the whole installation seat 200.

It is to be described next that, in this embodiment, a first mounting cavity 701 and a second mounting cavity 702 which are used in cooperation are further formed inside the bottom plate 100; wherein the first mounting cavity 701 is used for assembling a tooth-shaped part of a knife bar 801 of a surgical instrument driving mechanism, and the second mounting cavity 702 is used for assembling a rotating gear 802 which is meshed and matched with the tooth-shaped part. The rotary gear 802 cooperates with the drive cassette to rotate the rotary gear 802, and the rotary gear 802 directly engages with the toothed portion of the knife bar 801 to drive the knife bar 801 to rotate. It should be noted that the rotating gear 802 is a unitary plastic structure, and the rotating gear 802 can rotate smoothly in the second mounting cavity 702.

For the rotating gear 802 and the second mounting cavity 702, the rotating gear 802 is fixed to the second mounting cavity 702 in a clamping manner for improving the convenience and efficiency of assembly. For the clamping assembly, in the embodiment, referring to the drawings, for example, a second split latch 803 for clamping fit with the second mounting cavity 702 is integrally formed on the rotary gear 802. For the specific matching structure of the second forking latch 803 and the second mounting cavity 702, reference may be made to the structure of the first forking latch and the mounting base 200, and specific details are not described herein again.

Compare the spacing subassembly of support among the prior art, the use of mounting panel has been cancelled to this embodiment for on the basis of equivalent structure size, this embodiment can increase whole bottom plate 100's thickness, thereby can reduce the probability that bottom plate 100 warp, and then improve overall structure's stability. In contrast, in order to avoid the increase of the thickness of the bottom plate 100 and the simultaneous increase of the weight of the bottom plate 100, a plurality of weight-reducing grooves 101 are formed in the bottom plate 100 at intervals. This allows the overall panel 100 to achieve both weight and structural stability.

Example 2:

referring to fig. 1 to 13, on the basis of the supporting and limiting assembly for a surgical instrument driving mechanism in embodiment 1, a bottom plate 100 of the supporting and limiting assembly for a surgical instrument driving mechanism in this embodiment is further provided with a code element 904 and an indicator light 903. A code base 901 for matching a code piece 904 and an indicating base 902 for matching an indicating lamp 903 are prefabricated on the corresponding bottom plate 100.

The code piece 904 is movably fixed in the code base 901 through the matching of the support rod 905 and the clamp spring, and a clamp spring groove 9053 for assembling the clamp spring is prefabricated on the support rod 905; and the support bar 905 also cooperates with the drive cassette to drive the code member 904 in rotation to change the state of the indicator light 903 so that the table of the state of the indicator light 903 is used to indicate that the number of uses of the knife attached to the knife bar 801 has reached an upper limit.

In more detail, the code member 904 has a hollow interior including a generally kidney-shaped support rod bore 9041 and at least one generally rectangular rib slot 9042 extending through the support rod bore 9041. The rod hole 9041 is used for matching with the support rod 905. And a baffle 9043 with a roughly T-shaped structure and two baffle teeth 9045 which are distributed at intervals are formed on the outer wall of the code piece 904. The baffle 9043 is used for shielding signals of the sensor so as to change the state of the indicator 903, and the blocking teeth 9045 are matched with a code seat formed on the bottom plate 100 to play a role in mechanical limiting. Specifically, when the number of times of using the knife connected to the knife bar 801 reaches an upper limit, the driving box may be controlled to rotate so as to rotate the transmission member of the support bar 905, further drive the marker 904 to rotate, and the baffle 9043 on the marker 904 shields (or does not shield) the sensor, so as to generate a signal change, thereby changing the state of the indicator 903.

On the basis of the structure, the supporting rod 905 comprises a rod body matched with the supporting hole 9041 and a rib 9051 which is arranged on at least one side of the rod body and matched with the rib groove 9042 in an inserting mode, the rib 9051 is matched with the rib groove 9042 of the code piece to achieve the positioning and limiting effects, and the movement gap between the supporting rod 905 and the code piece 904 is reduced. It should be noted that, in this embodiment, the number of the ribs 9051 and the rib grooves 9042 may be the same, one or two of the ribs 9051 and the rib grooves 9042 may be provided more, or the number of the ribs 9051 and the rib grooves 9042 may be different, for example, there are two rib grooves 9042 and only one rib 9051, so that any one rib groove 9042 may be selected for the rib 9051 to be inserted and fitted. However, the drawing of this embodiment only takes the case that one rib 9051 is disposed on one side of the rod body as an example, here, one rib 9051 can achieve the limiting effect of the fit between the support rod 905 and the code marking piece 904, and one rib 9051 can reduce the difficulty of processing compared with two ribs 9051.

In summary, for the supporting and limiting assembly of the present embodiment, the layout of the mounting seat 200, the supporting seat 300, the first mounting cavity 701, the second mounting cavity 702, the code base 901, and the indicating seat 902 on the overall base plate 100 is optimized, and the mounting seat 200, the supporting seat 300, and the indicating seat 902 are external structures with respect to the base plate 100, and the first mounting cavity 701, the second mounting cavity 702, and the code base 901 are internal structures with respect to the base plate 100, so that the design structure of cooperative internal and external structures can reduce unexpected interference between the components on the base plate 100, and improve the compactness of the overall structure, so that compared with the prior art, the utilization rate of the overall space of the base plate 100 can be effectively improved on the basis of not affecting the external volume of the overall supporting and limiting assembly structure, thereby optimizing the overall functionality of the surgical instrument driving mechanism using the supporting and limiting assembly of the present embodiment, and making the performance of the surgical instrument driving mechanism applied to a specific minimally invasive surgical robot be more complete.

Example 3:

the embodiment provides a supporting and limiting assembly suitable for a surgical instrument driving mechanism, which comprises a supporting seat 300, wherein a transverse shaft hole 301 and a longitudinal limiting hole 302 are vertically distributed, and a through structure is arranged between the transverse shaft hole 301 and the longitudinal limiting hole 302. The transverse shaft hole 301 is used for supporting the rotating shaft 502 connected with the lever 600 of the surgical instrument driving mechanism, and the longitudinal limiting hole 302 is used for accommodating an elastic piece with one end suitable for abutting against the rotating shaft 502.

More specifically, the transverse shaft hole 301 is a through hole structure, and the longitudinal position-limiting hole 302 is a blind hole structure, and referring to the situation shown in the drawings, the transverse shaft hole 301 is distributed in parallel with the base plate 100, the longitudinal position-limiting hole 302 is distributed in perpendicular with the base plate 100, the transverse shaft hole 301 extends to a pair of opposite side end faces of the supporting seat 300 perpendicular to the base plate 100, and the opening of the longitudinal position-limiting hole 302 extends to the top end face of the supporting seat 300 away from the base plate 100, so that the elastic element can be conveniently inserted into the longitudinal position-limiting hole 301 from the top end face of the supporting seat 300 away from the base plate 100.

It should be noted that the elastic member in the present embodiment is, for example, but not limited to, a spring 501. Here, the elastic member preferably abuts against a middle portion of the rotation shaft 502. In this embodiment, the rotating shaft 502 is disposed in the supporting base 300, so that an upper mounting plate in the prior art is omitted, and the position of the fulcrum of the lever 600 does not change in the process of moving the lever 600, thereby improving the transmission precision.

Based on the structure, in the assembling process, the elastic part is firstly installed in the longitudinal limiting hole 302, then the rotating shaft 502 is installed in the transverse shaft hole 301, and the rotating shaft 502 can be abutted against the elastic part when the rotating shaft 502 is installed, so that a certain pretightening force can be applied to the rotating shaft 502 through the elastic part, namely, the gap between the rotating shaft 502 and the transverse shaft hole 301 is eliminated through the abutting action of the elastic part on the rotating shaft 502, and the transmission precision is further ensured.

It should be noted that, for the specific structure of the supporting seat 300 of the present embodiment, it can be independently applied to the driving mechanism of the surgical instrument in any mature means in the prior art and used in cooperation with the lever 600, and can also be used in cooperation with the structures of the embodiment 1 and/or embodiment 2, and the specific structure of the supporting seat 300 in the present embodiment is specifically applied to the driving mechanism of the surgical instrument in which scene, and the present embodiment is not limited by any means.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims

1. A support and limit assembly adapted for use with a surgical instrument drive mechanism, comprising: the mounting base is convexly arranged on the top end face of the bottom plate; wherein

2. The supporting and limiting assembly suitable for the driving mechanism of the surgical instrument as claimed in claim 1, wherein a protection plate protruding towards the supporting seat is formed on each of two axial side edges of the open-close gear; and

a pair of said guards are adapted to form a clearance fit with the teeth of the lever.

3. A support and spacing assembly as claimed in claim 1 or claim 2, wherein the mounting block is snap-fitted to the retractable gear.

4. The support limit assembly suitable for the driving mechanism of the surgical instrument as claimed in claim 1, wherein the switching gear comprises a cylindrical gear body located in the accommodating cavity and a first switching tongue formed at one axial end of the cylindrical gear body; and

5. The support limit assembly for the driving mechanism of the surgical instrument as claimed in claim 4, wherein a limit portion having an inner diameter smaller than that of the receiving cavity is integrally formed at the top end of the mounting seat away from the bottom plate; the limiting part is provided with a limiting cavity communicated with the accommodating cavity and the opening;

6. The support and limit assembly for the driving mechanism of a surgical instrument as recited in claim 5, wherein the first jag bolt comprises a cylindrical connecting portion integrally connected to the cylindrical gear body and having an outer diameter smaller than that of the cylindrical gear body, a plurality of axially-extending slots spaced apart from the cylindrical connecting portion, and a tapered head formed at an end of the cylindrical connecting portion away from the cylindrical gear body;

the columnar connecting part is suitable for clearance fit with the limiting cavity; and the conical bottom surface of the conical head is pressed against the opening, and the columnar gear body is abutted against the L-shaped engagement surface towards the shaft end of the first split lock tongue.

7. The support limit assembly suitable for the driving mechanism of the surgical instrument, as recited in claim 1, wherein a first mounting cavity and a second mounting cavity are further formed inside the bottom plate; wherein

8. The support limit assembly of claim 7, wherein the rotary gear is fixed to the second mounting cavity in a snap fit manner.

9. The support limit assembly of claim 8, wherein a second forking latch is integrally formed on the rotary gear for snap-fit engagement with the second mounting cavity.

10. A support and limit assembly adapted for use with a surgical instrument drive mechanism, comprising: the supporting seat is convexly arranged on the top end face of the bottom plate; wherein

A transverse shaft hole and a longitudinal limiting hole which are vertically distributed are formed in the supporting seat; the transverse shaft hole is used for supporting a rotating shaft connected with a lever of the surgical instrument driving mechanism, and the longitudinal limiting hole is used for accommodating an elastic piece of which one end is suitable for being abutted against the rotating shaft.