WO2023123498A1

WO2023123498A1 - Insertion surgical forceps

Info

Publication number: WO2023123498A1
Application number: PCT/CN2021/144023
Authority: WO
Inventors: 伍和坤; 吴琦斌; 耿平
Original assignee: 杭州光典医疗器械有限公司
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-06

Abstract

Insertion surgical forceps, comprising a jaw assembly (100), a clamping rod assembly (200), and a handle assembly (300). The clamping rod assembly (200) comprises a clamping rod (210), the clamping rod (210) being connected to the jaw assembly (100). The handle assembly (300) comprises a mounting base (310), a control handle (320), and a latching mechanism, the control handle (320) being connected to the clamping rod (210) so as to drive the clamping rod (210) to move along an axial direction thereof, so as to grasp and release a jaw (110) in the clamping rod assembly (200). The latching mechanism comprises a locking member (331), and in a latching mode, the locking member (331) maintains contact with the clamping rod (210), so as to maintain the current positions of the clamping rod (210) and the jaw (110) when a user releases the control handle (320). A locking mechanism locks the clamping rod (210) by means of a friction force, so that the position of the claw beam (210) is accurate to an expected locking position response of the user, and compared with a rigid locking structure, when bodily tissue of a patient is clamped by means of the insertion surgical forceps, damage to the tissue of the patient can be avoided by means of friction force locking.

Description

Insert type surgical forceps

technical field

The present application relates to medical instruments, in particular to an insert-type surgical forceps.

Background technique

Inserted surgical forceps are a kind of forceps instruments that are inserted into the human body for surgical treatment, including but not limited to endoscopic grasping forceps. This type of insertion forceps forms the gripping force by applying force on the proximal handle portion and transmitting the force to the distal forceps head portion through a long rod assembly. Furthermore, in minimally invasive surgery, the purpose of freeing and grasping tissues in the abdominal cavity is achieved by manipulating instruments outside the abdominal cavity.

Because the jaw part of the forceps usually needs to be in the clamping state for a long time during the operation, in order to reduce the labor intensity of the user and avoid the need for the user to apply force for a long time to keep the clamp head clamped, some plug-in surgical forceps are equipped with a locking mode. In the card lock mode, after the pliers head is closed, the user can release the handle. At this time, the pliers head cannot be opened until the user actively operates the handle part to open the pliers head.

The usual locking structure is realized by a ratchet and a pawl. Therefore, the grabbing pliers is prone to problems such as locking one more tooth and clamping too tightly, and locking one less tooth and clamping too loosely. Moreover, the locking structure composed of the ratchet wheel and the pawl is a rigid structure, which may easily cause excessive force of the forceps during grasping and damage the tissue.

technical problem

The present application provides a plug-in surgical forceps to demonstrate another locking structure of the plug-in surgical forceps.

technical solution

Based on the above purpose, an embodiment of the present application provides a kind of insertion type surgical forceps, which includes:

A claw assembly, the claw assembly includes two opposite claws for clamping and releasing the object to be grasped;

a pliers rod assembly, the pliers rod assembly comprising a pliers rod connected to the jaw assembly for transmitting force and motion to the jaw assembly;

And a handle assembly, the handle assembly includes a mounting seat, a control handle and a locking mechanism, the end of the pliers rod away from the jaw assembly can be axially movable on the mounting seat, the control handle and the pliers The rod is connected to drive the pliers rod to move along its axial direction, so as to realize the clamping and releasing of the jaws;

The locking mechanism is arranged on the mounting seat, the locking mechanism includes a locking member, the locking mechanism has a locking mode, and in the locking mode, the locking member and the pliers The lever remains in contact to lock the position of the pliers lever when the user releases the control handle.

In one embodiment, the locking member has a through hole through which the pliers rod passes, the through hole is larger than the outer diameter of the pliers rod, and in the locking mode, the The locking piece and the through hole are arranged obliquely relative to the pliers rod, and the two oppositely arranged hole walls on the through hole are pressed against different positions of the pliers rod respectively, and two opposite directions are applied to the pliers rod. Pressing force to limit the movement of the locking member.

In one embodiment, in the locking mode, an angle a between the locking member and the pliers rod is: 0°<a≤85°.

In one embodiment, the card locking mechanism has a card-free mode, and the card locking mechanism includes a mode switching member. In the card-free mode, the locking member is separated from the pliers rod; the mode switching The part is movably connected to the mounting seat, and the mode switching part and the locking part form a linkage structure to drive the locking part to move relative to the pliers rod, so that the locking mechanism switches to the card mode and/or card lock mode.

In one embodiment, the locking mechanism further includes a first elastic member, the first elastic member acts on the locking member, and provides the locking member with a function to keep the locking member at the The elastic recovery force of the card-free mode or the card-lock mode.

In one embodiment, the installation seat has an elastic member installation seat, one end of the first elastic member is located on the elastic member installation seat, and the other end of the first elastic member abuts against the locking member.

In one embodiment, one end of the locking member is arranged on the mounting seat, and the other end is a movable end.

In one embodiment, the mounting seat has a suspension part for limiting the downward movement of the mode switching member, a front limiting part and a limit buckle located below the suspension part; in the locking mode , the mode switching member is suspended on the suspension part, the first elastic member pushes the locking member into frictional contact with the pliers rod, and the first elastic member directly or indirectly acts on the mode switching member , making the mode switching member lean against the suspension portion and the front limiting portion; in the card-free mode, the mode switching member snap fits on the suspension portion and the limiting buckle , the mode switching member is kept at a position capable of directly or indirectly pressing against the locking member and the first elastic member, so that the locking member is kept separated from the pliers rod.

In one embodiment, the mode switching member has a push top located on the rear side of the locking member, and the push top is used to drive the lock when switching from the card-free mode to the locked mode. The piece approaches the pliers rod.

In one embodiment, the mounting seat has a blocking portion located on the rear side of the mode switch, and the blocking portion is used to block the mode switch from moving backward.

In one embodiment, the mode switching member has an escape groove located below the pliers rod, and the pliers rod passes through the avoidance groove.

In one embodiment, the jaw assembly and the pincer rod assembly form a first force transmission structure that controls the clamping and release of the jaws, and an elastic structure is provided in the first force transmission structure, and the elastic structure is located at The pliers bar is intended to be in front of a locking region in contact with the locking element.

In one embodiment, the pliers rod assembly includes an outer tube, the outer tube is connected to the mounting seat, and the pliers rod is axially movable inside the outer tube; the outer tube or the handle assembly A second elastic member is provided on it, and the second elastic member acts on the outer tube, and the outer tube forms an elastic floating connection structure with the mounting base through the second elastic member.

In one embodiment, the mounting seat has a limiting slot of the elastic member, the outer tube has a stopper, the outer tube passes through the limiting slot of the elastic member, and the stopper is placed on the limiter of the elastic member. In the position groove, the second elastic member is arranged in the limit groove of the elastic member and resists the stop platform.

In one embodiment, the outer pipe has a first pipe section and a second pipe section, the first pipe section is fixedly connected to the mounting seat, and the second pipe section and the first pipe section pass through the second elastic member connected, the clamp rod axially passes through the first pipe section, the second pipe section and the second elastic member.

In one embodiment, the pliers rod assembly includes an outer tube, the outer tube is connected to the mounting base, the pliers rod is axially movable inside the outer tube, and the outer tube is elastic Plastic outer tube or wire braided flexible shaft.

In one embodiment, at least one of the control handle, the outer tube, the pliers rod and the claws is provided with a third elastic member, and the control handle, the outer tube, the pliers rod, the pliers claws and the third elastic member form a continuous The second force transfer structure.

In one embodiment, the control handle includes a connection part and a force application part for the user to apply external force, the connection part is rotatably arranged on the mounting seat, and is movably connected with the pliers rod, and the connection The part and the force application part are connected through the third elastic member.

In one embodiment, in the second force transmission structure, the third elastic member is located in front of a locking area of the pliers rod for contacting with the locking member.

In one embodiment, the third elastic member is provided between the jaws and the pliers rod, and the pliers rod tightens the jaws through the third elastic member.

In one embodiment, at least a part of the pliers bar located in front of the locking area is an elastic structure.

Beneficial effect

The insertion surgical forceps according to the above embodiment includes a claw assembly, a forceps bar assembly and a handle assembly. The pliers rod assembly includes a pliers rod connected to the jaw assembly. The handle assembly includes a mounting seat, a control handle and a locking mechanism. The control handle is connected with the pliers rod to drive the pliers rod to move along its axial direction, so as to realize the clamping and release of the claws in the pliers rod assembly. The locking mechanism includes a locking member, and in the locking mode, the locking member is kept in contact with the pliers bar to keep the pliers bar and the jaws at the current position when the user releases the control handle. The locking mechanism locks the pliers rod through friction, so that the position of the pliers rod responds accurately to the locking position expected by the user. Compared with the rigid locking structure, when the patient's body is clamped by the inserted surgical forceps This frictional locking prevents damage to the patient's tissue when the patient's tissue is removed.

Description of drawings

Fig. 1 is a schematic structural view of the clamp bar assembly and the handle assembly of the plug-in surgical forceps in an embodiment of the present application;

Fig. 2 is a schematic structural diagram of the clamp rod assembly and the claw assembly of the plug-in surgical forceps in an embodiment of the present application;

Fig. 3 is an exploded view of the handle assembly and the pliers bar assembly of the plug-in surgical forceps in an embodiment of the present application;

Fig. 4 is a schematic diagram of cooperation between the locking member and the pincer rod in an embodiment of the present application;

Fig. 5 is a schematic structural diagram of the lock mechanism in an embodiment of the present application when it is in the lock mode;

Fig. 6 is a schematic structural diagram of the lock mechanism in an embodiment of the present application when it is in the card-free mode;

7 and 8 are structural schematic diagrams of a mode switching member in an embodiment of the present application;

9 and 10 are structural schematic diagrams of the mode switching member locked in the no-card mode in an embodiment of the present application;

Fig. 11 is a structural schematic diagram of a second elastic member provided between the outer tube and the mounting seat in an embodiment of the present application;

Fig. 12 is a structural schematic diagram of a second elastic member provided between the outer tube and the mounting seat in another embodiment of the present application

Fig. 13 is a structural schematic diagram of a second elastic member provided on the outer tube in an embodiment of the present application;

Fig. 14 is a structural schematic diagram of a third elastic member provided on the control handle in an embodiment of the present application;

Fig. 15 is a schematic structural view of the pincer rod having an elastic structure in an embodiment of the present application;

Fig. 16 is a structural schematic view of the embodiment shown in Fig. 15 after the outer tube is installed.

Embodiments of the present invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and general technical knowledge in the field.

In addition, the characteristics, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment, and do not mean a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application include direct and indirect connection (connection) unless otherwise specified.

An embodiment of the present application provides an insert-type surgical forceps, which is a forceps-like device inserted into a human body for surgical treatment, for example including but not limited to endoscopic grasping forceps.

Please refer to FIGS. 1-5 , in an embodiment, the insertion surgical forceps includes a claw assembly 100 , a forceps rod assembly 200 , a handle assembly 300 and other related components.

The jaw assembly 100 includes two opposing jaws 110 and other related structures, the jaws 110 are used to clamp and release the object to be grasped. The pliers rod assembly 200 is elongated and includes a pliers rod 210 connected to the jaw assembly 100 for transmitting force and movement to the jaw assembly 100 . For example, the pliers rod 210 can be connected to the jaws 110 . Wherein, the connection structure between the pliers bar assembly 200 (including the pliers bar 210 ) and the jaw assembly 100 can adopt various feasible structures in published documents, so as to realize the clamping and releasing of the jaws 110 .

The handle assembly 300 is used to control the clamping and releasing of the jaw assembly 100 through the pliers lever assembly 200 . The handle assembly 300 includes a mount 310 , a control handle 320 and a locking mechanism. The mounting seat 310 may be the handle housing of the handle assembly 300 or a structure assembled on the handle housing. The mounting seat 310 can also be an integrally formed part, or a component composed of two or more subcomponents. For example, as shown in Figures 1 and 3, in one embodiment, the mount 310 is a handle housing, which includes a main housing 311 and a side housing 312, the main housing 311 and the side housing 312 are enclosed to form An installation cavity is used for installing the control handle 320, the locking mechanism, the clamp rod assembly 200 and other components.

The end of the pliers rod 210 facing away from the jaw assembly 100 is axially movable on the mounting seat 310 . The control handle 320 is connected with the pliers rod 210 to drive the pliers rod 210 to move along its axial direction, so as to realize the clamping and releasing of the jaws 110 . The control handle 320 and the pliers rod 210 can be connected directly or indirectly through other components, so as to be able to drive the pliers rod 210 to move. The control handle 320 can be installed on the mounting base 310 (such as the mounting base 310 is a handle shell, and the control handle 320 is installed on the handle shell), and can also be mounted on other components (such as when the mounting base 310 is not a handle shell. , can be installed in the handle housing together with the control handle 320). The control handle 320 is movable, for example, can form a scissor or gun handle structure with the control handle 320 , so that the user can control the movement of the jaws 110 through the control handle 320 .

In order to be able to promptly and quickly respond to the locking requirement of the pliers rod 210, please refer to 3-5. In one embodiment, a locking mechanism is also provided. The locking mechanism is disposed on the mounting base 310 . The locking mechanism includes a locking member 331 . Wherein, the card locking mechanism has at least a card locking mode. That is, the card lock mechanism may only have a card lock mode (always remain in the card lock mode), and may also have other modes, such as no card mode, etc., which will be further described in detail later.

In the locking mode, the locking member 331 is always in contact with the pliers rod 210, so that when the user releases the control handle 320, the locking member 331 forms a frictional force on the pliers rod 210, preventing the pliers rod 210 from being displaced after the user’s external force disappears. , and then lock the position of the pliers rod 210 , and finally keep the pliers 110 in the state when the user releases the control handle 320 . For example, when the target needs to be clamped for a long time, the user can release the control handle 320 after controlling the jaws 110 to clamp the target. At this time, under the action of the locking member 331, the pincer rod 210 and the jaws 110 still remain Clamping state to reduce the labor intensity of the user. Unless the user controls the jaw 110 to release again through the control handle 320 , for example, the user applies an external force to overcome the force of the locking member 331 on the pincer rod 210 to change the action state of the jaw 110 . For the convenience of subsequent description, the region on the pliers bar 210 that contacts and locks with the locking member 331 is referred to as a locking region in this embodiment.

Compared with achieving the locking purpose through the ratchet and pawl, in this embodiment, the locking mechanism realizes the locking of the pliers rod 210 through frictional force, so that the position of the pliers rod 210 responds accurately to the locking position expected by the user, and relatively For the rigid locking structure, when the inserted surgical forceps clamps the body tissue of the patient, the way of locking by friction force can avoid damage to the tissue of the patient.

As long as the frictional force between the locking member 331 and the pliers rod 210 can satisfy the need to lock the pliers rod 210 when the user releases the control handle 320, the contact between the locking member 331 and the pliers rod 210 can be surface contact or line contact. And any way such as point contact.

Referring to FIGS. 4 and 5 , in one embodiment, the locking member 331 has a through hole 3311 through which the pliers rod 210 passes. The through hole 3311 is larger than the outer diameter of the pliers rod 210 . In the locking mode, as shown in FIGS. 4 and 5 , the locking member 331 and the through hole 3311 are arranged obliquely relative to the pliers rod 210 , and the two oppositely arranged hole walls 3312 on the through hole 3311 are pressed against different positions of the pliers rod 210 respectively. , and apply two pressing forces in opposite directions to the pliers rod 210 (as indicated by arrows in FIG. 4 ), so as to limit the movement of the locking member 331 . The hole wall 3312 and the pliers rod 210 can be one or more combinations of point contact, line contact and surface contact, so as to achieve the purpose of locking the pliers rod 210 . Under this structure, the two hole walls 3312 of the through hole 3311 are respectively located at different positions in the axial direction of the pliers rod 210, and can at least exert a force in the opposite direction or approximately opposite direction to the pliers rod 210. This structure is more conducive to stability. The pincer lever 210 is locked so that it remains in its current position when the user releases the control handle 320 .

In one embodiment, in the locking mode, the angle a between the locking member 331 and the pliers rod 210 is: 0°<a≦85°. At this angle, the locking member 331 can better lock the pliers rod 210 , so as to prevent the pliers rod 210 from moving in the axial direction when the user releases the control handle 320 , thereby affecting the clamping and releasing of the jaws 110 .

Further, in some embodiments, the locking mechanism may only have a locking mode, that is, the locking member 331 is always in contact with the pliers rod 210 , and the movement of the pliers rod 210 is completed by external force exerted by the user. In some other embodiments, the card locking mechanism can also have a card-free mode.

As shown in FIG. 6 , in the card-free mode, the locking member 331 is separated from the pliers rod 210 , and the pliers rod 210 can be driven to move more easily at this time, and the operation is easier for the user. Users can switch between no-card mode and card-lock mode as needed. For example, when the pliers rod 210 needs to be moved, it can be switched to the no-card mode so as to drive the pliers rod 210 to move more easily; when the pliers rod 210 needs to be locked, it can be switched to the locked mode.

Please refer to Figs. 3, 4-10, in one embodiment, the card locking mechanism includes a mode switch 332, and the mode switch 332 is used to switch between the card-free mode and the locking mode of the card locking mechanism. The mode switching member 332 is movably connected to the mounting base 310, wherein the mode switching member 332 and the locking member 331 form a linkage structure, so that under the control of the user, the locking member 331 can be driven to move relative to the pliers rod 210, so that the locking mechanism Switch to the card-free mode (the locking member 331 is disengaged from the pliers rod 210 ) and/or the locking mode (the locking member 331 remains in contact with the pliers rod 210 ). Wherein, the mode switching member 332 can be directly connected with the locking member 331 , indirectly connected or form a linkage structure in a coupled manner, as long as the mode switching member 332 can drive the locking member 331 to move. The movement of the locking member 331 includes but not limited to rotation, translation or a combination thereof.

The mode switch 332 can be used to only drive the card locking mechanism to unilaterally switch to the card-free mode or the card locking mode, and can also be used to control the card locking mechanism to switch between the card-free mode and the card locking mode. When the mode switching member 332 drives the card locking mechanism to unilaterally switch to the card-free mode or the card locking mode, the reset of the card locking mechanism to another mode can be realized by resetting the elastic member or other structures.

Please refer to FIGS. 5-10 , in an embodiment, the mode switching member 332 can be designed as a trigger structure on the handle assembly 300 , which is convenient for the user to pull with fingers. Of course, in other embodiments, the mode switching member 332 can also be configured as a shift block, a shift lever, a pull rod, a push block, a pressure handle, and the like.

Further, in some embodiments, please refer to Figures 3, 5 and 6, the locking mechanism further includes a first elastic member 333, the first elastic member 333 acts on the locking member 331, and provides the locking member 331 with a The locking member 331 maintains an elastic recovery force in the card-free mode or the card-lock mode. In the illustrated structure, when the locking mechanism is in the locking mode (as shown in FIG. 5 ) and in the no-card mode (as shown in FIG. 6 ), the first elastic member 333 provides a locking member 331 with a The spring force driving its movement towards the locked mode. When in the locking mode (as shown in FIG. 5 ), the locking member 331 is mainly driven by the first elastic member 333, and remains in the locking mode, and the mode switching member 332 can release the locking member 331, and can also Generate an active force that does not affect the locking member 331 to lock the pliers rod 210 . When the user can control the mode switching member 332 to overcome the elastic force of the first elastic member 333 and move the locking member 331 to the card-free mode (as shown in FIG. 6 ), at this time, the mode switching member 332 is limited on the mounting seat 310, stay in no-card mode. The first elastic member 333 can adopt various elastic structures such as springs, shrapnels, and torsion springs.

The first elastic member 333 can drive the locking member 331 to move through stretching or retracting elastic force. In the embodiment shown in FIGS. 5 and 6, the first elastic member 333 is a compression spring, which is always in a compressed state. . Specifically, as shown in FIGS. 9 and 10 , in one embodiment, the mount 310 has an elastic member mount 313 , one end of the first elastic member 333 is located on the elastic member mount 313 , and the other end of the first elastic member 333 Abut against the locking member 331 directly or indirectly. The elastic member installation seat 313 may have a cavity for accommodating the first elastic member 333 . In addition, the elastic member installation seat 313 may also be a boss or other structures capable of installing the elastic member.

Please refer to FIGS. 5 and 6 , in one embodiment, the locking member 331 is roughly rotatably mounted on the mounting base 310 . Specifically, one end of the locking member 331 is disposed on the mounting base 310, and the other end is a movable end, and force is applied to the movable end to drive the locking member 331 to rotate. Specifically, please refer to FIGS. 9 and 10. In one embodiment, the mounting base 310 has a limiting cavity 314 with one end large and the other end small, and one end of the locking member 331 is accommodated in the larger end of the limiting cavity 314. , so that one end of the locking member 331 can only move within a small range, and the other end (movable end) of the locking member 331 is movably set at the larger end of the limiting cavity 314, so the movable end can be limited The larger range of movement in the bit cavity 314 makes the movement path of the locking member 331 roughly rotate. Of course, in other embodiments, the locking member 331 can also be rotated through a shaft connection. Please refer to FIGS. 9 and 10 . In one embodiment, the first elastic member 333 directly abuts against the movable end of the locking member 331 to push it to move to the locking position in the locking mode.

Further, in one embodiment, under the action of the mode switching member 332 , the mounting base 310 and the first elastic member 333 , the locking member 331 can be kept in the card-free mode and the card-lock mode.

Specifically, in one embodiment, please refer to FIGS. 3, 5 and 7-10, the mount 310 has a suspension part 315 for restricting the downward movement of the mode switching member 332, a front limiting part 316 and a suspension part located at The limit buckle 317 below the 315. In the locking mode, the mode switching member 332 is suspended on the suspension portion 315 , and the mode switching member 332 is provided with a raised suspension platform 3321 . The upward direction of the mode switching member 332 leaves a space for the mode switching member 332 to move. The suspension structure allows the mode switching member 332 to have a certain movable space relative to the hanging portion 315 , for example, the lower end of the mode switching member 332 is in a free state and can swing on the hanging portion 315 to a certain extent. The first elastic member 333 pushes the locking member 331 into frictional contact with the pliers rod 210, and the first elastic member 333 directly or indirectly acts on the mode switching member 332, for example, the locking member 331 or other components abut against the mode switching member 332, or The first elastic member 333 directly abuts against the mode switching member 332 , or there are multiple first elastic members 333 , and some of the first elastic members 333 are used to abut against the mode switching member 332 . Finally, the mode switching member 332 is made to abut against the suspension portion 315 and the front limiting portion 316 to form a limit on the mode switching member 332 and keep it at this position. In the illustration, the locking member 331 and the first elastic member 333 withstand the mode switching member 332 from the right side of the mode switching member 332, and the front limiting portion 316 is located on the side opposite to the locking member 331 (that is, the left side in the figure). side). The top of the mode switching member 332 can have a slope 3325 for matching with the front limiting portion 316 . The front limiting portion 316 is mainly used to limit the upward movement of the mode switching member 332 .

Please refer to Figure 6-10, in the card-free mode, the mode switch 332 is clipped and fitted on the suspension part 315 and the limit buckle 317, and the lower end of the mode switch 332 is fixed by the limit buckle 317, so that the mode switch 332 is kept at a position capable of directly or indirectly pressing against the locking member 331 and the first elastic member 333 . At this time, although the first elastic member 333 also applies elastic force to the mode switching member 332, it cannot overcome the directional force provided by the suspension part 315 and the limit buckle 317. Therefore, the mode switching member 332 can make the locking member 331 Keep the state separated from the pincer rod 210 . In order to fasten the limiting buckle 317 , the mode switching member 332 has a locking platform 3322 , and the limiting buckle 317 is mainly used to resist the elastic force of the first elastic member 333 on the mode switching member 332 . In one embodiment, the limit buckle 317 is disposed on the side of the first elastic member 333 away from the mode switching member 332 .

Please refer to Figure 9, when it is necessary to switch from the card-free mode to the card-lock mode, the user can pull the mode switching member 332 upwards along the arrow to disengage the buckle of the lower limit buckle 317, so that the external force exerted by the user And under the elastic force of the first elastic member 333, the locking member 331 and the mode switching member 332 are moved to the card-free mode.

Further, please refer to FIGS. 7-10 , in one embodiment, the mode switching member 332 has a push top 3323 located on the rear side of the locking member 331, and the push top 3323 is used for switching from the card-free mode to the locked mode. Drive the locking piece 331 to approach the pliers rod 210 . That is, the locking member 331 can be moved into the locking mode faster by the external force of the user.

Further, please refer to FIGS. 9 and 10 , in one embodiment, the mounting base 310 has a blocking portion 318 located at the rear side of the mode switching member 332 , and the blocking portion 318 is used to block the mode switching from moving backward. The blocking portion 318 can be provided as one or more than one depending on the situation.

Further, please refer to Figs. 9 and 10. In one embodiment, in order to avoid the pliers rod 210, the mode switching member 332 has an avoidance groove 3324 located below the pliers rod 210, and the pliers rod 210 passes through the avoidance groove 3324 for more It is good to cooperate with the locking piece 331.

On the other hand, generally, the jaw assembly 100 and the jaw rod assembly 200 form a first force transmission structure that controls the clamping and release of the jaw 110, and the first force transmission structure includes between the jaw 110 and the jaw 110, Participate in the entire structure of force transmission and motion control to the jaws 110 . Specifically, in one embodiment, the pliers rod assembly 200 includes an outer tube 220, the outer tube 220 is connected to the mounting base 310, the pliers rod 210 can be axially movably arranged in the outer tube 220, and the jaws 110 can be connected to On the pincer bar 210 or the outer tube 220 , under the mutual cooperation of the outer tube 220 and the pincer bar 210 , when the pincer bar 210 moves into the outer tube 220 , the jaws 110 are closed; otherwise, the jaws 110 are released.

Usually, in the locking mode, when the user releases the control handle 320 , the force value on the pliers rod 210 will inevitably lose a part, which will cause the clamping force of the jaws 110 to weaken, thereby affecting the clamping effect.

In this regard, in an embodiment of the present application, the force value on the pliers rod 210 and the pliers jaws 110 is maintained by adding an elastic structure to store energy. For example, in one embodiment, an elastic structure (including but not limited to structures such as springs, shrapnel, disc springs, compression springs, etc.) is provided in the above-mentioned first force transmission structure. Before the locking area where the part 331 contacts (the front mentioned here does not refer to the front and rear positional relationship in the space. The front mentioned here refers to the path of force transmission to the jaw 110, relative to the jaw 110, compared with The locking area is closer to the force transmission path area of the jaw 110 , for example, the end of the pliers rod 210 close to the jaw 110 can be understood as being located in front of the locking area as mentioned herein). Alternatively, in another embodiment, this purpose may also be achieved by arranging elastic structures at other positions, such as arranging elastic structures on the control handle 320 .

The outer tube 220 or the handle assembly 300 is provided with a second elastic member 410 , the second elastic member 410 acts on the outer tube 220 , and the outer tube 220 forms an elastic floating connection structure with the mounting base 310 through the second elastic member 410 . When the user drives the jaws 110 to close, the second elastic member 410 absorbs the reverse force of the jaws 110 and the mounting seat 310 to deform to realize power storage; when the user releases the control handle 320, the second elastic member 410 resets under the action of the elastic restoring force, and the elastic restoring force acts on the jaws 110 to maintain the force value on the jaws 110 and prevent the jaws 110 from being released from the closed state.

Please refer to FIGS. 3 , 11 and 12 . In one embodiment, the mounting base 310 has a limiting slot 319 for an elastic member, and the outer tube 220 has a stopper 223 . The outer tube 220 passes through the limiting groove 319 of the elastic component, and the blocking platform 223 is placed in the limiting groove 319 of the elastic component. When the user exerts force and pulls the pliers rod 210 to the right as shown in the figure, the distance between the outer tube 220 and the mounting seat 310 is shortened, and the second elastic member 410 is compressed to store force. When the user releases the control handle 320 , the second elastic member 410 reacts against the outer tube 220 and the claws 110 under the action of the elastic restoring force, so as to maintain the force value.

The second elastic member 410 can adopt various elastic structures such as springs, shrapnels, and torsion springs. In the embodiment shown in FIG. 11 , the second elastic member 410 is a spring. In the embodiment shown in FIG. 12 , the second elastic member 410 is an elastic piece.

Another embodiment, please refer to FIG. 13 , the outer tube 220 has a first tube section 221 and a second tube section 222 . The first pipe section 221 is fixedly connected to the mounting seat 310, the second pipe section 222 is connected to the first pipe section 221 through the second elastic member 410, and the clamp rod 210 passes through the first pipe section 221, the second pipe section 222 and the second elastic member in the axial direction. 410.

In another embodiment, the outer tube 220 itself may be elastic, for example, the outer tube 220 is an elastic plastic outer tube 220 or a wire braided flexible shaft.

In another embodiment, at least one of the control handle 320, the pliers rod 210 and the jaws 110 is provided with a third elastic member 420, and the control handle 320, the outer tube 220, the pliers rod 210, the jaws 110 and the third elastic Member 420 forms a continuous second force transfer structure. The second force transmission structure includes the aforementioned first force transmission structure, and at the same time, on the basis of the first force transmission structure, a force transmission path behind the locking area is added, such as the participation of the control handle 320 . When the user drives the jaws 110 to close, the third elastic member 420 accumulates force; when the user releases the control handle 320, the elastic restoring force of the third elastic member 420 drives the jaws 110 to maintain the relative position with the outer tube 220, keeping the forceps The force value of the jaws 110 prevents the jaws 110 from being released from the closed state.

For example, referring to FIGS. 11 and 14 , in one embodiment, the control handle 320 includes a connection portion 321 and a force application portion 322 for the user to apply external force. The rod 210 is movably connected, and the connecting part 321 and the force applying part 322 are connected through the third elastic member 420 . When the user applies an external force through the force applying portion 322, the third elastic member 420 is compressed and deformed to form a force storage structure.

Further, because in the locking mode, when the user releases the control handle 320, the locking member 331 fixes the pliers rod 210, therefore, a better embodiment is that in the second force transmission structure, the third elastic The part 420 is located in front of the locking area where the pincer rod 210 is used to contact the locking part 331, that is, the power storage structure is located at the front end of the pincer rod 210 where it is locked by the locking part 331 (the end close to the jaw 110 is the front), It is avoided that when the user releases the control handle 320 , the reset elastic force of the third elastic member 420 is counteracted by the locking force of the locking member 331 on the pliers rod 210 .

For example, referring to FIG. 2 , in one embodiment, a third elastic member 420 is provided between the jaw 110 and the pliers rod 210 , and the pliers rod 210 tightens the jaw 110 through the third elastic member 420 . When the user applies an external force through the control handle 320, the third elastic member 420 is compressed and deformed to form a force storage structure.

Alternatively, referring to FIGS. 15 and 16 , in one embodiment, at least a part of the pliers bar 210 located in front of the locking area is an elastic structure 430 . The elastic structure 430 can be a spring, or an elastic plastic tube or a metal wire braided flexible shaft. When the user applies an external force through the control handle 320, the elastic structure 430 is compressed and deformed to form a force storage structure.

The above uses specific examples to illustrate the present invention, which is only used to help understand the present invention, and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, some simple deduction, deformation or replacement can also be made according to the idea of the present invention.

Claims

A kind of insert type surgical forceps, it is characterized in that, it comprises:

A claw assembly, the claw assembly includes two opposite claws for clamping and releasing the object to be grasped;

a pliers rod assembly, the pliers rod assembly comprising a pliers rod connected to the jaw assembly for transmitting force and motion to the jaw assembly;

And a handle assembly, the handle assembly includes a mounting seat, a control handle and a locking mechanism, the end of the pliers rod away from the jaw assembly can be axially movable on the mounting seat, the control handle and the pliers The rod is connected to drive the pliers rod to move along its axial direction, so as to realize the clamping and releasing of the jaws;

The locking mechanism is arranged on the mounting seat, the locking mechanism includes a locking member, the locking mechanism has a locking mode, and in the locking mode, the locking member and the pliers The lever remains in contact to lock the position of the pliers lever when the user releases the control handle.
The insertion surgical forceps according to claim 1, wherein the locking member has a through hole through which the pliers rod passes, and the through hole is larger than the outer diameter of the pliers rod , in the locking mode, the locking member and the through hole are arranged obliquely relative to the pliers rod, and the two oppositely arranged hole walls on the through hole respectively abut against different positions of the pliers rod, and The pincer rod exerts two pressing forces in opposite directions to limit the movement of the locking member.
The insertion surgical forceps according to claim 2, characterized in that, in the locking mode, the angle a between the locking member and the forceps rod is: 0°<a≤85°.
The insert-type surgical forceps according to claim 2 or 3, wherein the locking mechanism has a card-free mode, the locking mechanism includes a mode switch, and in the card-free mode, the locking The part is separated from the pliers rod; the mode switching part is movably connected to the mounting seat, and the mode switching part and the locking part form a linkage structure to drive the locking part to move relative to the pliers rod , to switch the card locking mechanism to the no-card mode and/or the card-lock mode.
The insertion surgical forceps according to claim 4, characterized in that, the locking mechanism further comprises a first elastic member, and the first elastic member acts on the locking member to provide the locking member with The elastic recovery force is used to keep the locking member in the card-free mode or the card-lock mode.
The insertion type surgical forceps according to claim 5, wherein the mounting seat has an elastic member mounting seat, one end of the first elastic member is located on the elastic member mounting seat, and the first elastic member has an elastic member mounting seat. The other end abuts against the locking piece.
The insertion type surgical forceps according to claim 5, wherein one end of the locking member is arranged on the mounting seat, and the other end is a movable end.
The insert-type surgical forceps according to any one of claims 5-7, characterized in that, the mounting base has a suspension part for limiting the downward movement of the mode switching member, a front limiting part and a suspension part located at the suspension part. The limit buckle under the part; in the locking mode, the mode switching part is suspended on the hanging part, and the first elastic part pushes the locking part into frictional contact with the pliers rod, so The first elastic member directly or indirectly acts on the mode switching member, making the mode switching member lean against the suspension portion and the front limit portion; in the card-free mode, the mode switching member locks Fitted on the suspension part and the limit buckle, the mode switching member is kept at a position where it can directly or indirectly press the locking member and the first elastic member, so that the locking member Keep detached from the pliers bar.
The insertion type surgical forceps according to claim 8, wherein the mode switching member has a push top located at the rear side of the locking member, and the push top is used to switch from the card-free mode to the lock. When the locking mode is switched, the locking member is driven to approach the pliers rod.
The insertion surgical forceps according to claim 8 or 9, wherein the mounting base has a blocking portion located at the rear side of the mode switching member, and the blocking portion is used to block the mode switching from moving backward.
The insertion surgical forceps according to any one of claims 8-10, characterized in that, the mode switch has an escape groove located below the forceps rod, and the forceps rod passes through the escape groove.
The insertion surgical forceps according to any one of claims 1-11, characterized in that, the jaw assembly and the jaw rod assembly form a first force transmission structure that controls the gripping and releasing of the jaws, and the first An elastic structure is provided in a force transmission structure, and the elastic structure is located in front of a locking area of the pliers rod for contacting with the locking member.
The insertion surgical forceps according to any one of claims 1-12, characterized in that, the pliers rod assembly includes an outer tube, the outer tube is connected to the mounting seat, and the pliers rod can move axially set in the outer tube; the outer tube or the handle assembly is provided with a second elastic member, the second elastic member acts on the outer tube, and the outer tube passes through the second elastic member and the The mounting seat forms an elastic floating connection structure.
The insert-type surgical forceps according to claim 13, wherein the mounting seat has a limiting groove of an elastic member, the outer tube has a stopper, and the outer tube passes through the limiting groove of the elastic member, so The blocking platform is placed in the limiting groove of the elastic element, and the second elastic element is arranged in the limiting groove of the elastic element and resists the blocking platform.
The insertion type surgical forceps according to claim 13, wherein the outer tube has a first tube section and a second tube section, the first tube section is fixedly connected to the mounting seat, and the second tube section is connected to the The first pipe section is connected through the second elastic member, and the clamp rod axially passes through the first pipe section, the second pipe section and the second elastic member.
The insertion surgical forceps according to any one of claims 1-13, characterized in that, the pliers rod assembly includes an outer tube, the outer tube is connected to the mounting seat, and the pliers rod can move axially The outer tube is arranged in the outer tube, and the outer tube is an elastic plastic outer tube or a metal wire braided flexible shaft.
The insertion surgical forceps according to any one of claims 1-11, characterized in that at least one of the control handle, the outer tube, the forceps rod and the claws is provided with a third elastic member, and the control handle, The outer tube, the pliers rod, the pliers jaws and the third elastic member form a continuous second force transmission structure.
The insertion surgical forceps according to claim 17, wherein the control handle includes a connection part and a force application part for the user to apply external force, the connection part is rotatably arranged on the mounting base, and is connected with the The pliers rod is movably connected, and the connecting part and the force applying part are connected through the third elastic member.
The insertion type surgical forceps according to claim 17, characterized in that, in the second force transmission structure, the third elastic member is located in the locking area of the forceps rod for contacting the locking member Before.
The insertion surgical forceps according to claim 19, characterized in that, the third elastic member is provided between the jaws and the pliers rod, and the pliers rod tightens the pliers through the third elastic member. claw.
The insertion type surgical forceps according to claim 19, wherein at least a part of the forceps rod located in front of the locking area is an elastic structure.