CN219516513U - Conductive slip ring assembly and tissue closed cutting instrument - Google Patents

Abstract

The utility model discloses a conductive slip ring component and a tissue closed cutting instrument, wherein the conductive slip ring component comprises: the sliding ring rotor and the sliding ring stator can rotate relatively at least in the circumferential direction, the sliding ring rotor is provided with a large sliding ring and a small sliding ring, the radial size of the small sliding ring is smaller than that of the large sliding ring, the sliding ring stator is provided with a large sliding sheet and a small sliding sheet, the small sliding sheet is positioned on the radial inner side of the large sliding sheet, the large sliding ring is in sliding contact with the large sliding sheet and can conduct electricity, the small sliding ring is in sliding contact with the small sliding sheet and can conduct electricity, the large sliding ring and the small sliding ring are used for being electrically connected with a cutter head assembly of the tissue closed cutting instrument, and the large sliding sheet and the small sliding sheet are used for being electrically connected with a wire. The conductive slip ring assembly is used for supplying power to the cutter head assembly by the tissue closure cutting instrument, and the rotation of the cutter head assembly of the tissue closure cutting instrument is not limited by the cooperation of the slip ring rotor and the slip ring stator which can rotate relatively, so that 360-degree rotation can be realized, and the tissue closure cutting instrument is convenient for clinical use.

Description

Conductive slip ring assembly and tissue closed cutting instrument

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a conductive slip ring assembly and a tissue closure cutting instrument.

Background

At present, two main types of tissue closure cutting instruments are mainstream in the market, wherein one type of tissue closure cutting instruments is used for effectively controlling a reflux path of high-frequency current during operation, so that a closure effect is guaranteed, and accidental thermal damage caused by the fact that the reflux path is not constrained is reduced. The electrode plates of the upper jaw and the lower jaw of the product are isolated from the base part by insulating plastic, and are respectively connected to the input end and the electrode plates of the upper jaw and the lower jaw by two paths of wires, so that only the electrode plates are charged partially, and in a complex tissue environment, high-frequency current can flow back only through the electrode plates of the upper jaw and the lower jaw, thereby ensuring the closing effect in the complex environment and effectively avoiding unexpected thermal damage. However, because the lead wire cannot rotate without angle limitation, the cutter head cannot rotate for 360 degrees, and certain inconvenience is caused to clinical use.

The other type of cutter bar member is used as one of the wires, so that the complete 360-degree rotation of the cutter head is realized, and the upper jaw of the cutter head needs to be connected with the cutter bar member for conducting, so that the support, insulation and complete separation of conducting cannot be realized, and the conducting area cannot be completely restrained. This in turn renders the return path unable to be fully constrained when working in complex tissue environments, which may cause unnecessary accidental thermal damage.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model innovatively provides a conductive slip ring assembly and a tissue closed cutting instrument, which can solve the technical problem that the rotation of a tissue cutting instrument tool bit assembly is limited in the prior art.

To achieve the above object, a first aspect of the present utility model discloses an electrically conductive slip ring assembly for powering a cutter head assembly of a tissue closure cutting instrument, comprising: a slip ring rotor and a slip ring stator, which are rotatable relative to each other at least in the circumferential direction,

the slip ring rotor is provided with a large slip ring and a small slip ring, the radial dimension of the small slip ring is smaller than that of the large slip ring,

the slip ring stator is provided with a large slip sheet and a small slip sheet, the small slip sheet is positioned at the radial inner side of the large slip sheet,

the large slip ring is in sliding contact with the large slip sheet and can conduct electricity, the small slip ring is in sliding contact with the small slip sheet and can conduct electricity,

the large slip ring and the small slip ring are used for being electrically connected with a tool bit assembly of the tissue closure cutting instrument, and the large slip sheet and the small slip sheet are used for being electrically connected with a wire.

Further, the slip ring rotor includes a housing formed at a periphery of the guide shaft, and a guide shaft, an annular space is formed between the housing and the guide shaft,

the large slip ring and the small slip ring are formed within the annular space.

Further, the slip ring rotor further comprises a transmission cylinder, the transmission cylinder is arranged at the outer end of the shell, the transmission cylinder and the guide shaft extend in opposite directions, and the transmission cylinder is used for being in transmission connection with the tool bit assembly.

Further, the slip ring stator comprises a stator framework, a guide hole is formed on the stator framework, the guide shaft extends into the guide hole and is in rotary fit with the guide hole,

the stator framework further comprises a supporting part, wherein the supporting part is formed at the periphery of the guide hole and used for installing the large sliding vane and the small sliding vane.

Further, the stator framework also comprises a sliding shaft which is coaxially arranged with the guide hole,

the outer wall surface of the sliding shaft is a non-cylindrical surface.

In a second aspect, the utility model discloses a tissue closure cutting instrument comprising:

a housing comprising a body and a handle;

the cutter bar assembly comprises a cutter bar and a knob, the knob is fixedly connected with the cutter bar, the cutter bar is rotatably arranged on the main body of the shell, and a part of the cutter bar stretches into the main body;

the cutter head assembly is arranged on the cutter bar assembly in an openable and closable manner;

an electrically conductive slip ring assembly, comprising: a slip ring rotor and a slip ring stator, which are rotatable relative to each other at least in the circumferential direction,

the slip ring rotor is provided with a large slip ring and a small slip ring, the radial dimension of the small slip ring is smaller than that of the large slip ring,

the slip ring stator is provided with a large slip sheet and a small slip sheet, the small slip sheet is positioned at the radial inner side of the large slip sheet,

the slip ring is in sliding contact with the large slip sheet and can conduct electricity, the small slip ring is in sliding contact with the small slip sheet and can conduct electricity,

the large slip ring and the small slip ring are used for being electrically connected with a cutter head assembly of the tissue closure cutting instrument, and the large slip sheet and the small slip sheet are used for being electrically connected with a wire;

and the reset elastic piece provides elastic force for expanding the tool bit assembly for the conductive slip ring.

Further, the cutter bar is of a tubular structure, a guide support column is arranged in the cutter bar, the guide support column and the cutter bar synchronously rotate,

and a plurality of mounting grooves are formed on the peripheral wall of the guide support column along the length direction of the guide support column.

Further, the tool bit assembly comprises an upper jaw, a lower jaw and a clamping pull rod, the lower jaw is fixedly arranged at the end part of the tool bar, the upper jaw is rotatably connected with the lower jaw, the clamping pull rod is slidably arranged in a mounting groove of the guide support column in a penetrating way,

the tail end of the upper jaw is provided with a sliding hole, the first end of the clamping pull rod is in sliding connection with the sliding hole, and the clamping pull rod is used for driving the upper jaw to rotate to finish opening and closing actions.

Further, the tool bit assembly also comprises a sliding block which is connected with the clamping pull rod,

the slip ring rotor includes a housing and a guide shaft, the housing is formed at the periphery of the guide shaft, an annular space is formed between the housing and the guide shaft, the large slip ring and the small slip ring are formed in the annular space,

the slip ring rotor also comprises a transmission cylinder which is arranged at the outer end of the shell and opposite to the extending direction of the guide shaft,

the transmission cylinder is in transmission connection with the sliding block and is used for transmitting rotation torque.

Further, the reset elastic piece comprises an elastic piece, the elastic piece is of an annular structure, a through hole is formed on the side wall of the elastic piece,

the slip ring stator comprises a stator framework, a guide hole is formed on the stator framework, the guide shaft extends into the guide hole and is in running fit with the guide hole,

the stator framework further comprises a sliding shaft, the sliding shaft and the guide hole are coaxially arranged, the outer wall surface of the sliding shaft is a non-cylindrical surface, and the sliding shaft and the elastic sheet extend into a through hole in the side wall of the elastic sheet.

The beneficial effects of the utility model are as follows:

the conductive slip ring assembly is used for supplying power to the cutter head assembly by the tissue closure cutting instrument, and the rotation of the cutter head assembly of the tissue closure cutting instrument is not limited by the cooperation of the slip ring rotor and the slip ring stator which can rotate relatively, so that 360-degree rotation can be realized, and the tissue closure cutting instrument is convenient for clinical use.

Drawings

FIG. 1 shows a schematic structural diagram of an embodiment of the conductive slip ring assembly of the present utility model;

FIG. 2 is a schematic diagram showing an exploded view of an embodiment of the conductive slip ring assembly;

FIG. 3 illustrates a schematic cross-sectional view of an embodiment of the conductive slip ring assembly of the present utility model;

FIG. 4 illustrates a schematic view of the structure of a tissue closure cutting instrument in accordance with an embodiment of the present utility model;

FIG. 5 illustrates a schematic internal construction of a tissue closure cutting instrument in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic view showing an assembled state of a limiting sleeve and a cutter bar according to an embodiment of the present utility model;

FIG. 7 shows a schematic structural view of a locking mechanism according to an embodiment of the present utility model;

FIG. 8 is a schematic view showing the structure of the locking latch and the stopper according to the embodiment of the present utility model;

FIG. 9 shows a schematic structural view of a cutter head assembly according to an embodiment of the present utility model;

FIG. 10 is a schematic view showing an assembled state of a force control mechanism and a cutter head assembly according to an embodiment of the present utility model;

FIG. 11 is a schematic diagram showing an assembled state of a force control mechanism and an electrically conductive slip ring according to an embodiment of the present utility model;

FIG. 12 shows a schematic cross-sectional view of a force control mechanism and an electrically conductive slip ring in accordance with an embodiment of the present utility model;

FIG. 13 illustrates a schematic internal construction of a tissue closure cutting instrument (excluding a clamping wrench) according to an embodiment of the present utility model;

fig. 14 shows a schematic view of the internal structure of a tissue closure cutting instrument (excluding a clamping wrench and a cutting wrench) according to an embodiment of the present utility model.

In the drawing the view of the figure,

1. a conductive slip ring assembly; 11. a slip ring rotor; 111. a housing; 112. a guide shaft; 113. a large slip ring; 114. a small slip ring; 115. a transmission cylinder; 12. a slip ring stator; 121. a guide hole; 122. a support part; 123. a large slide; 124. a small sliding piece; 125. a sliding shaft; 2. a return elastic member; 3. a housing; 31. a main body; 32. a handle; 33. a rotating piece; 331. a locking shaft; 34. a torsion spring; 4. a cutter bar assembly; 41. a cutter bar; 42. a knob; 43. a limit sleeve; 431. a first stop collar; 432. a second limiting ring; 5. a cutter head assembly; 51. an upper jaw; 511. a connecting sheet; 512. a rotating shaft; 52. a lower jaw; 521. a connecting column; 53. clamping the pull rod; 54. a sliding block; 55. a cover plate; 56. a sliding connection shaft; 6. a force control mechanism; 61. an outer cylinder; 62. an inner cylinder; 63. a force control spring; 64. a retainer ring; 65. a baffle ring; 66. a clamping wrench; 661. locking the clamping block; 662. a stop block; 67. a transmission rod; 7. a blade driving mechanism; 71. driving the sliding cylinder; 72. a transmission block; 73. a cutting wrench; 74. cutting a spring; 8. and (5) conducting wires.

Detailed Description

The conductive slip ring assembly and the tissue closure cutting instrument provided by the utility model are explained and illustrated in detail below with reference to the accompanying drawings.

The conductive slip ring assembly provided by the utility model supplies power for the cutter head assembly of the tissue cutting instrument, and the rotation of the cutter head assembly of the tissue closing cutting instrument is not limited by the cooperation of the slip ring rotor 11 and the slip ring stator 12 which can rotate relatively, so that 360-degree rotation can be realized, and the tissue closing cutting instrument is convenient for clinical use. The utility model is described in detail below in connection with specific embodiments:

in one embodiment, the present utility model provides an electrically conductive slip ring assembly 1 for a tissue closure cutting instrument for powering a blade assembly disposed within a housing of the tissue closure cutting instrument. As shown in fig. 1, 2 and 3, the slip ring rotor 11 and the slip ring stator 12 can rotate relatively at least in the circumferential direction, the slip ring rotor 11 is provided with a large slip ring 113 and a small slip ring 114, the radial dimension of the small slip ring 114 is smaller than that of the large slip ring 113, the slip ring stator 12 is provided with a large slip sheet 123 and a small slip sheet 124, the small slip sheet 124 is positioned at the radial inner side of the large slip sheet 123, the large slip ring 113 is in sliding contact with the large slip sheet 123 and can conduct electricity, the small slip ring 114 is in sliding contact with the small slip sheet 124 and can conduct electricity, the large slip ring 113 and the small slip sheet 114 are used for being electrically connected with a cutter head assembly of the tissue closure cutting instrument, and the large slip sheet 123 and the small slip sheet 124 are used for being electrically connected with a wire.

In this embodiment, the slip ring rotor 11 and the slip ring stator 12 are in running fit, the slip ring rotor 11 is electrically connected with the tool bit assembly, and the slip ring stator 12 is connected with the wires, so that the rotation of the tool bit assembly is not limited, and the power supply of the tool bit assembly is not limited due to the electrical connection between the slip ring rotor 11 and the slip ring stator 12 through the slip ring and the slip sheets, thereby facilitating clinical use.

As shown in fig. 3, the slip ring rotor 11 includes a housing 111 and a guide shaft 112, the housing 111 is formed at the outer periphery of the guide shaft 112, an annular space is formed between the housing 111 and the guide shaft 112, the guide shaft 112 is in a rotating fit with the slip ring rotor 11, and a large slip ring 113 and a small slip ring 114 are formed in the annular space. Alternatively, the large slip ring 113 is attached to an annular structure provided on the inner peripheral wall of the housing 111, the width in the axial direction thereof is smaller than the width of the housing 111, the small slip ring 114 is provided radially inside the large slip ring 113, and a certain gap is provided between the small slip ring 114 and the guide shaft 112, avoiding affecting the fit with the slip ring rotor 11 and providing space for the fit of the small slip ring 114 with the small slip sheet 124.

The slip ring rotor 11 further comprises a driving cylinder 115, the driving cylinder 115 is formed at the outer end of the housing 111, the driving cylinder 115 extends opposite to the guiding shaft 112, and the driving cylinder 115 is used for driving connection with the tool bit assembly, so that the slip ring rotor 11 can synchronously rotate along with the tool bit assembly.

The slip ring stator 12 includes a stator frame, on which a guide hole 121 is formed, and a guide shaft 112 extends into the guide hole 121 and is rotatably fitted with the guide hole 121. The stator frame further includes a support portion 122 formed at the outer periphery of the guide hole 121 for mounting the large slide 123 and the small slide 124. Optionally, the supporting portion 122 is in an annular structure, the large sliding vane 123 is disposed along the peripheral wall of the supporting portion 122 to form an annular or semi-annular shape, the small sliding vane 124 is disposed inside the supporting portion 122 and may be also disposed in an annular or semi-annular structure, so that the contact range between the two sliding vanes and the sliding ring can be increased, and the rotation angle of the rotor 11 of the sliding ring 113 is increased, so that the rotor 11 of the sliding ring can rotate 360 degrees, and the rotation of the tool bit assembly is not limited.

The stator skeleton further comprises a sliding shaft 125, the sliding shaft 125 and the guide hole 121 are coaxially arranged, and the outer wall surface of the sliding shaft 125 is a non-cylindrical surface, so that the stator skeleton can realize axial sliding and cannot rotate in the circumferential direction, and the connection between the slip ring stator 12 and a wire can be prevented from being influenced.

The present utility model also provides a tissue closure cutting instrument, as shown in fig. 4 and 5, comprising: a housing 3: the cutter bar assembly 4, the cutter bar assembly 4 comprises a cutter bar 41 and a knob 42, the cutter bar 41 is rotatably arranged on the shell 3, a part of the cutter bar 41 stretches into the shell 3, and the knob 42 is fixedly connected with the cutter bar 41; the cutter head assembly 5 is arranged on the cutter bar assembly 4 in an openable and closable manner; the force control mechanism 6 is arranged in the shell 3, and the force control mechanism 6 is connected with the tool bit assembly 5 and is used for applying clamping force to the tool bit and controlling the magnitude of the clamping force; the conductive slip ring assembly 1 is slidably arranged in the shell 3 along the axial direction of the cutter bar assembly 4, the cutter head assembly 5 is connected with the conductive slip ring assembly 1, the conductive slip ring assembly 1 comprises a slip ring rotor 11 and a slip ring stator 12, the slip ring rotor 11 and the slip ring stator 12 are electrically connected through conductive sheets, the slip ring rotor 11 is electrically connected with the cutter head assembly 5 and synchronously rotates with the cutter bar assembly 4, and the slip ring stator 12 is electrically connected with the lead wire 8; the return elastic member 2 provides an elastic force for opening the bit assembly 5 to the conductive slip ring assembly 1.

In this embodiment, the conductive component is provided to supply power to the tool bit component 5, and the conductive component adopts the conductive slip ring component 1 to realize electrical connection, so that the rotation of the tool bar component 4 is not limited, and the tool bit can realize 360-degree rotation. And the conductive component is connected with the tool bit component 5 through a power supply line, and the tool bar component 4 is not used for conducting electricity, so that accidental thermal damage in the operation process is avoided.

In particular, the method comprises the steps of,

the housing 3 includes a main body 31 and a handle 32, the inside of the main body 31 and the handle 32 forming an installation space, and the installation space inside of the main body 31 and the handle 32 communicates, and the handle 32 and the main body 31 form a T-like or inverted L-like structure.

As shown in fig. 4, 5 and 6, the cutter bar assembly 4 includes a cutter bar 41 and a knob 42, wherein the cutter bar 41 is in an elongated tubular structure, the knob 42 is sleeved on the cutter bar 41 and fixedly connected with the cutter bar 41, the rotation of the cutter bar 41 can be controlled by the knob 42, and a part of the cutter bar 41 extends into the main body 31 of the housing 3 and is mounted in cooperation with a part of the structure in the main body 31. Optionally, the cutter bar 41 is sleeved with a limiting sleeve 43, and the limiting sleeve 43 is fixedly connected with the cutter bar 41 (for example, can be connected in an interference fit manner) so that the cutter bar 41 and the limiting sleeve 43 can synchronously rotate. A plurality of limiting rings are distributed on the outer peripheral wall of the limiting sleeve 43 along the axial direction of the limiting sleeve, wherein the limiting sleeve comprises at least one first limiting ring 431 which is axially limited with the main body 31 of the shell 3 and is in a circular ring structure, and the first limiting ring is in rotating fit with a circular ring groove in the main body 31, so that the limiting sleeve 43 cannot move relative to the main body 31 in the axial direction and can rotate relative to the main body 31 in the circumferential direction. The limiting ring further comprises a second limiting ring 432 matched with the knob 42, the second limiting ring 432 is any non-circular ring such as square, rectangular and oval, and can form limiting fit with a limiting groove inside the knob 42 so that the limiting sleeve 43 and the knob 42 cannot move relatively in the axial direction and the circumferential direction, and accordingly the limiting sleeve 43 and the cutter bar 41 can be driven to rotate synchronously through rotating the knob 42, and rotary motion of the cutter head assembly 5 is achieved.

The cutter bar 41 is internally provided with a guide support column, the outer peripheral wall of the guide support column is tightly attached to the inner peripheral wall of the cutter bar 41 to enable the guide support column to rotate synchronously with the cutter bar 41, a plurality of mounting grooves are formed in the outer peripheral wall of the guide support column along the length direction of the guide support column, and the mounting grooves are used for mounting related structures of the cutter head assembly 5 and power supply lines. Optionally, the guiding support column is made of flexible material, for example, may be made of rubber, and is configured into a cylindrical structure, and its outer diameter is larger than the inner diameter of the cutter bar 41, so that the guiding support column can be filled into the cutter bar 41 through elastic deformation, and can be guaranteed to form close fit with the inner wall of the cutter bar 41. The mounting groove is formed in the outer peripheral wall of the guide support column, and may be designed to pass through along both ends or one end of the guide support column in the axial direction as required.

Further, the cutter bar assembly 4 further comprises an outer sleeve, which is sleeved on the portion of the cutter bar 41 located outside the housing 3, and the outer sleeve is, for example, a medical-grade pp tube, and plays a role in protecting the cutter bar 41.

As shown in fig. 9, the cutter head assembly 5 is disposed at an end of the cutter bar 41, and includes an upper jaw 51, a lower jaw 52, and a clamping bar 53, the lower jaw 52 is fixedly disposed at the end of the cutter bar 41, the upper jaw 51 is rotatably connected to the lower jaw 52, and the clamping bar 53 is slidably disposed in one mounting groove of the guide supporting column and is protruded from the other end of the mounting groove.

Optionally, the tail end of the lower jaw 52 is provided with a connecting post 521, and the whole connecting post 521 is cylindrical and can be inserted from the end of the cutter bar 41, and is fixedly connected by matching the outer peripheral wall of the connecting post 521 with the inner peripheral wall of the cutter bar 41. A slide groove is formed in the connecting rod 521 in the axial direction thereof, and the slide groove penetrates the side wall of the connecting rod 521, and the end portion of the clamp rod 53 can slide in the slide groove.

The tail end of the upper jaw 51 is provided with a connecting sheet 511, a sliding hole is formed in the connecting sheet 511, the first end of the clamping pull rod 53 is slidably connected with the sliding hole, optionally, the sliding pull rod is connected with the sliding hole through a sliding connecting shaft 56, wherein the sliding connecting shaft 56 can slide in the sliding hole, the sliding hole is an inclined long hole, and the angle of the connecting sheet 511 can be changed during the sliding process of the sliding connecting shaft 56 in the sliding hole, so that the upper jaw 51 is controlled to rotate to finish the clamping or opening action.

Optionally, two connection pieces 511 are provided, the two connection pieces 511 are disposed in parallel, and sliding holes on the two connection pieces 511 are disposed opposite to each other. The connecting piece 511 is provided with a rotating shaft 512, a corresponding installation groove is arranged at the opening of the sliding groove on the connecting column 521, the rotating shaft 512 is rotatably arranged in the groove, and the upper jaw 51 is rotatably connected with the lower jaw 52 through the rotating shaft 512. The connecting post 521 is provided with a cover plate 55, and the cover plate 55 is covered on the mounting groove to limit the rotating shaft 512 in the mounting groove. The connecting pieces 511 extend into the sliding grooves of the connecting posts 521, the end parts of the clamping pull rods 53 form a sheet shape and extend between the two connecting pieces 511, the middle part of the sliding connecting shaft 56 is connected with the clamping pull rods 53, the two ends of the sliding connecting shaft extend into the sliding holes of the two connecting pieces 511 respectively to form sliding fit with the sliding holes, the clamping pull rods 53 are pulled to drive the upper jaws 51 to rotate towards the lower jaws 52 to finish closing actions, and the clamping pull rods 53 are pushed to drive the upper jaws 51 to separate from the lower jaws 52 to finish opening actions.

The cutter head assembly 5 further includes a cutter blade connected to a blade pusher slidably disposed in the other mounting groove of the guide support column, the blade slidably disposed in the connecting column 521 of the lower jaw 52, and a cutting groove for sliding the blade formed on the clamping surfaces of the upper jaw 51 and the lower jaw 52, a part of the blade being located in the cutting groove of the upper jaw 51 and another part being located in the cutting groove of the lower jaw 52 and completing the cutting action by sliding.

The guide support column in the cutter bar 41 is further formed with a mounting groove for mounting a power supply line, and the power supply line penetrates through the cutter bar 41 and is connected with the cutter head assembly 5 for supplying power to the cutter head assembly 5.

As shown in fig. 5 and 10, the force control mechanism 6 is arranged inside the main body 31 of the casing 3 and used for pulling the clamping pull rod 53 to clamp the upper jaw 51 and the lower jaw 52, and the force control mechanism can control the clamping force, so that damage to clamped tissues caused by excessive clamping force is avoided. Optionally, the force control mechanism 6 includes an outer cylinder 61, an inner cylinder 62 and a force control spring 63, the outer cylinder 61 is slidably connected in the housing 3 along an axial direction thereof, the inner cylinder 62 is slidably disposed in the outer cylinder 61, the force control spring 63 is sleeved on the inner cylinder 62, a first end of the inner cylinder 62 is slidably connected with a first end of the outer cylinder 61, a baffle ring 65 is disposed on an outer peripheral wall of a second end of the inner cylinder 62, optionally, the baffle ring 65 and the inner cylinder 62 may be disposed as an integrally formed structure, or may be designed to be in a split structure for performing fixed connection. The first end of the force control spring 63 abuts against the inner end wall of the first end of the outer barrel 61, the second end of the force control spring 63 abuts against the stop ring 65 on the inner barrel 62, and the inner barrel 62 provides a certain pre-tightening force to the force control spring 63 to cause a certain compression of the force control spring 63. The first end of the inner cylinder 62 extends outside the outer cylinder 61, a retainer ring 64 is arranged at the first end of the inner cylinder 62, and the retainer ring 64 limits the inner cylinder 62 so that the first end of the inner cylinder 62 cannot slide into the outer cylinder 61, thereby forming an independent component of the force control mechanism 6.

The cutter bar 41 extends into the inner cylinder 62, the clamp lever 53 extends from the second end of the inner cylinder 62 and is connected to the slider 54 outside the inner cylinder 62, the slider 54 abuts against the second end of the inner cylinder 62, and the slider 54 is slidable in the outer cylinder 61 so as to be parallel to the axis of the clamp lever 53 and the cutter bar 41, and therefore, the connection position of the clamp lever 53 and the slider 54 is offset to one side of the axis of the slider 54, thereby causing the slider 54 to rotate synchronously with the clamp lever 53. When the force control mechanism 6 slides integrally, the clamping pull rod 53 can be pulled by the sliding block 54, so that the upper jaw 51 can move to complete the closing action.

In this embodiment, two guide grooves parallel to the axis of the outer wall of the outer cylinder 61 are respectively provided on opposite sides of the outer wall of the outer cylinder 61, and correspondingly, guide blocks are provided on the inner wall of the main body 31, and the guide blocks extend into the guide grooves to form sliding fit to guide and limit the sliding of the outer cylinder 61.

The force control mechanism 6 further comprises a clamping wrench 66 connected with the outer cylinder 61 for controlling the outer cylinder 61 to slide to complete the action of pulling the clamping pull rod 53. The clamping wrench 66 comprises a fixed end and a driving end, wherein the fixed end and the driving end are positioned in the main body 31, the fixed end is rotationally connected with the main body 31, the driving end is connected with the outer cylinder 61 through a transmission rod 67 for driving the outer cylinder 61 to move, and two ends of the transmission rod 67 are respectively hinged with the driving end of the clamping wrench and the outer cylinder 61. The clamping wrench 66 further includes a grip section extending from the body 31 and located on the front side of the handle 32, the grip section being rotatable toward and away from the handle 32.

In this embodiment, several conditions for controlling the cutter head assembly 5 to perform the closing action by the force control mechanism 6 include:

case one, when there is no tissue between the upper jaw 51 and the lower jaw 52: the clamping wrench 66 is driven to move to the limit position towards the outer barrel 61, the transmission rod 67 drives the outer barrel 61 to move towards the right side, the inner barrel 62 also moves towards the right side under the action of the force control spring 63, the sliding block 54 is driven to pull the clamping pull rod 53 to move towards the right side, and then the upper jaw 51 and the lower jaw 52 are closed. At this time, since the initial state of the force control spring 63 is pressed by the pretightening force X, the pressure between the upper jaw 51 and the lower jaw 52 is almost equal to X;

case two, when the space between the upper jaw 51 and the lower jaw 52 is filled with tissue (or a rigid object): the driving clamping wrench 66 is driven to move to the limit position towards the outer cylinder 61, the transmission rod 67 drives the outer cylinder 61 to move towards the right side, the inner cylinder 62 also moves towards the right side under the action of the force control spring 63, the sliding block 54 is driven to pull the clamping pull rod 53 to move towards the right side, the upper jaw 51 and the lower jaw 52 are blocked by clamped rigid objects and cannot be closed, the sliding block 54 and the clamping pull rod 53 cannot generate displacement, at the moment, the stroke generated by the driving of the outer cylinder 61 by the transmission rod 67 is completely compensated by the force control spring 63, namely the force control spring 63 is compressed, the elastic force generated by compression of the force control spring 63 is delta X, and the inner cylinder 62 does not move towards the right side along with the outer cylinder 61. The pressure between the upper and lower jaws 52 at this point is equal to x+δx;

case three, when normal tissue is clamped between the upper jaw 51 and the lower jaw 52: the pressure between the upper jaw 51 and the lower jaw 52 is now between case one and case two.

Through the analysis, the pressure range of the upper jaw 51 and the lower jaw 52 clamping tissues can be effectively controlled by adjusting and optimizing the design parameters of the force control spring 63 in the force control mechanism 6 under the existing transmission scheme, and the clinical use conditions are met.

As shown in fig. 7 and 8, a locking mechanism is provided in the handle 32 of the housing 3, a locking block 661 is provided on the holding section, and the locking mechanism is engaged with the locking block 661 to fix the holding section in a locked state. The front side of the handle 32, i.e. the side facing the clamping wrench 66, is open, and the gripping section of the clamping wrench can be partly inserted into the handle 32 for locking with the locking mechanism. Optionally, the locking mechanism includes a rotating plate 33, the rotating plate 33 is a substantially elongated sheet structure, a connecting end of the rotating plate 33 is rotatably connected to the handle 32, a locking shaft 331 is disposed at a position of the rotating plate 33 away from the connecting end, and the locking mechanism further includes an elastic member for providing an elastic force to the rotating plate 33 to enable the rotating plate 33 to be in an initial position when the rotating plate is not subjected to an external force. Further, the elastic member is a torsion spring 34, the main body 31 is sleeved at the connecting end of the rotating plate 33, two ends of the torsion spring 34 are respectively fixed on the handle 32 and the rotating plate 33, and the rotating plate 33 can be kept in an initial state under the action of the elastic force of the torsion spring 34.

As shown in fig. 6, a vertical plate extending toward the handle 32 is formed on the holding section, a locking block 661 is formed on a side wall of the vertical plate, the locking block 661 is a triangular bump, a side of the locking block far away from the handle 32 is concavely formed into a locking groove, the locking groove is an arc groove with gradually increased bending degree from top to bottom, a hook shape is formed at the bottom, and a first guiding inclined plane and a second guiding inclined plane are respectively formed at the other two sides, wherein the first guiding inclined plane is located at the upper side, and the second guiding inclined plane is located at the lower side. The locking shaft 331 is slidable into the locking groove along the first guide slope and slidable out of the locking groove along the second guide slope to the initial position. Optionally, a stopper 662 is further disposed on the vertical plate, where the stopper 662 is disposed opposite to the locking groove and is spaced apart from the locking groove, and when the locking shaft 331 slides out from the first guiding slope, the stopper 662 blocks the locking shaft 331, so that the holding section cannot move continuously. Optionally, the stopper 662 includes a blocking rib disposed in a state substantially parallel to the side where the locking groove is located, and a guide rib disposed perpendicular to the blocking rib and extending from a middle portion of the blocking rib toward the locking block.

The locking and unlocking processes are as follows: the grip section of the grip handle is moved in a direction approaching the handle 32 by the grip force until the lock shaft 331 contacts and slides along the first guide slope, and simultaneously the rotation piece 33 rotates, and the torsion spring 34 is compressed. When the locking shaft 331 slides out of the first guide slope, the rotating piece 33 rotates reversely under the action of the torsion spring 34, the locking shaft 331 falls back onto the stopper 662, at this time, the locking shaft 331 cannot move continuously under the action of the stopper rib and the guide rib, and the holding section cannot move any more. The release gripping section clamps the wrench to move reversely, the locking shaft 331 slides along the guide rib, and the locking shaft slides from the guide rib to slide into the locking groove under the action of the torsion spring 34, so that the locking of the clamping wrench 66 can not be continued.

Holding the grip section again and applying a gripping force to move the grip section in a direction approaching the handle 32, at which time the locking shaft 331 slides out of the locking groove and returns to the original position under the action of the torsion spring 34, and releasing the grip section returns the clamping wrench 66 to the original position.

As shown in fig. 5, 11 and 12, the conductive slip ring assembly 1 is integrally and axially slidably disposed in the main body 31 of the housing 3, and includes a slip ring rotor 11 and a slip ring stator 12, wherein the slip ring rotor 11 and the slip ring stator 12 are rotatably connected through a guide shaft 112 and a guide hole 121, and the guide shaft 112 and the guide hole 121 are relatively slidable in the axial direction and the circumferential direction. The slip ring stator 12 is provided with a slip shaft 125, and an outer peripheral wall of the slip shaft 125 is a non-cylindrical surface so that the slip ring stator 12 can slide only in the axial direction.

Alternatively, the slip ring rotor 11 is formed with a guide shaft 112, a housing 111 is formed at the periphery of the guide shaft 112, an annular space is formed between the housing 111 and the guide shaft 112, a large slip ring 113 and a small slip ring 114 are provided in the annular space, the large slip ring 113 and the small slip ring 114 are both annular conductive sheets, and the radial dimension of the large slip ring 113 is larger than the radial dimension of the small slip ring 114. The slip ring stator 12 is provided with a guide hole 121, a large elastic piece and a small elastic piece are arranged on the outer side of the guide hole 121, the large elastic piece and the small elastic piece are connected with the lead 8, wherein the elastic piece is in sliding contact with the large slip ring 113 to realize electric connection, and the small elastic piece is in sliding contact with the small slip ring 114 to realize electric connection. Optionally, the large slip ring 113, the small slip ring 114, and the large spring and the small spring are all made of a metal material with good wear resistance and electrical conductivity.

A transmission cylinder 115 is disposed at the opposite side of the end of the housing 111 of the slip ring rotor 11 to the extending direction of the guide shaft 112, and the transmission cylinder 115 is used for connecting with the sliding block 54, so that the sliding block 54 can drive the slip ring rotor 11 to rotate. Alternatively, the sliding block 54 includes a guide portion and a transmission portion, which are of unitary construction, the outer wall surface of the guide portion being slidably engaged with the inner wall surface of the outer cylinder 61 and guiding the axial sliding and rotation of the sliding block 54. The end face size of the transmission part is smaller than that of the guide part, the peripheral wall of the transmission part is a non-cylindrical surface, and the transmission part extends into the transmission cylinder 115 of the slip ring rotor 11 and is used for transmitting torque to the slip ring rotor 11 so that the slip ring rotor 11 rotates along with the transmission part.

The reset elastic member 2 comprises an elastic piece, the elastic piece is of an annular structure, a through hole is formed in the side wall of the elastic piece, and a sliding shaft 125 on the slip ring stator 12 is arranged in the through hole in a penetrating mode. The reset elastic member 2 can provide elastic force to enable the conductive slip ring assembly 1 to move leftwards integrally, so that the sliding block 54 and the clamping pull rod 53 are pushed to move leftwards, and the upper jaw 51 and the lower jaw 52 of the cutter head assembly 5 are opened.

As shown in fig. 13 and 14, a blade driving mechanism 7 is further disposed inside the main body 31 of the housing 3, and the blade driving mechanism 7 is connected to a blade push rod for pushing and pulling the blade to complete the cutting action. Optionally, the blade driving mechanism 7 includes a driving sliding cylinder 71, the driving sliding cylinder 71 is sleeved on the cutter bar 41, a slot hole is formed on the side wall of the cutter bar 41, and the end part of the blade push rod extends out of the slot hole and is connected with the driving sliding cylinder 71, and the driving sliding cylinder 71 can slide relative to the cutter bar 41, so as to drive the blade push rod to slide.

The cutting wrench 73 and the transmission block 72 are arranged in the main body 31 of the shell 3, the connecting end of the cutting wrench 73 is rotationally connected with the main body 31 from the upper side of the driving sliding cylinder 71, the transmission block 72 is arranged on the lower side of the driving sliding cylinder 71, the middle part of the transmission block 72 is rotationally connected with the main body 31, the upper end of the transmission block is in contact with the driving sliding cylinder 71 and can push the driving sliding hole to move leftwards, the lower end of the transmission block 72 is provided with a convex shaft, a long hole is arranged on the cutting wrench 73, the convex shaft is slidably arranged in the long hole, and the cutting wrench 73 can be pushed to drive the transmission block 72 to rotate through the convex shaft so as to push the driving sliding cylinder 71 to slide leftwards, so that the blade push rod pushes the blade to slide. A cutting spring 74 is arranged on the left side of the driving slide cylinder 71, the cutting spring 74 is sleeved on the cutter bar 41, when the driving slide cylinder 71 slides leftwards, the cutting spring 74 is compressed, after the force on the cutting wrench 73 is removed, the cutting spring 74 pushes the driving slide cylinder 71 to slide rightwards, so that the blade push rod pulls the blade to slide, and one cutting action is completed.

Further, an energy excitation key is further arranged on the shell 3 and connected with a power supply line, high-frequency current provided by a host is transmitted to the conductive slip ring assembly 1 through a lead 8, and then is provided for the cutter head assembly 5 through a power supply line inside the cutter bar assembly 4 to perform coagulation of the resistance value.

The conductive slip ring assembly provided by the utility model can enable the tissue closed cutting instrument to realize 360-degree rotation of the cutter head assembly, is convenient for clinical use, is not used for conduction, can realize a backflow path of high-frequency current to be completely restrained, avoids accidental thermal damage in the operation process, and enables the operation of the cutting instrument to be simpler. In addition, the setting of accuse power mechanism can be fine control to the clamping force of resistance, can avoid the clamping force too big to cause the damage or influence treatment to the tissue under the prerequisite of guaranteeing effective clamp.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to the terms "present embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any at least one embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, but any modifications, equivalents, and simple improvements made within the spirit of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. An electrically conductive slip ring assembly for a tissue closure cutting instrument for powering a cutter head assembly, comprising: a slip ring rotor and a slip ring stator, which are rotatable relative to each other at least in the circumferential direction,

the slip ring rotor is provided with a large slip ring and a small slip ring, the radial dimension of the small slip ring is smaller than that of the large slip ring,

the slip ring stator is provided with a large slip sheet and a small slip sheet, the small slip sheet is positioned at the radial inner side of the large slip sheet,

the large slip ring is in sliding contact with the large slip sheet and can conduct electricity, the small slip ring is in sliding contact with the small slip sheet and can conduct electricity,

the large slip ring and the small slip ring are used for being electrically connected with a tool bit assembly of the tissue closure cutting instrument, and the large slip sheet and the small slip sheet are used for being electrically connected with a wire.

2. The conductive slip ring assembly of claim 1, wherein the slip ring rotor comprises a housing and a guide shaft, the housing being formed at a periphery of the guide shaft, an annular space being formed between the housing and the guide shaft,

the large slip ring and the small slip ring are formed within the annular space.

3. The conductive slip ring assembly of claim 2, wherein the slip ring rotor further comprises a drive barrel at an outer end of the housing, the drive barrel extending in a direction opposite the guide shaft, the drive barrel for driving connection with the cutter head assembly.

4. The conductive slip ring assembly as set forth in claim 2 wherein the slip ring stator comprises a stator frame having a guide hole formed therein, the guide shaft extending into and being in rotational engagement with the guide hole,

the stator framework further comprises a supporting part, wherein the supporting part is formed at the periphery of the guide hole and used for installing the large sliding vane and the small sliding vane.

5. The conductive slip ring assembly as set forth in claim 4 wherein the stator frame further comprises a sliding shaft coaxially disposed with the guide bore,

the outer wall surface of the sliding shaft is a non-cylindrical surface.

6. A tissue closure cutting instrument, comprising:

a housing comprising a body and a handle;

the cutter bar assembly comprises a cutter bar and a knob, the knob is fixedly connected with the cutter bar, the cutter bar is rotatably arranged on the main body of the shell, and a part of the cutter bar stretches into the main body;

the cutter head assembly is arranged on the cutter bar assembly in an openable and closable manner;

an electrically conductive slip ring assembly, comprising: a slip ring rotor and a slip ring stator, which are rotatable relative to each other at least in the circumferential direction,

the slip ring rotor is provided with a large slip ring and a small slip ring, the radial dimension of the small slip ring is smaller than that of the large slip ring,

the slip ring stator is provided with a large slip sheet and a small slip sheet, the small slip sheet is positioned at the radial inner side of the large slip sheet,

the slip ring is in sliding contact with the large slip sheet and can conduct electricity, the small slip ring is in sliding contact with the small slip sheet and can conduct electricity,

the large slip ring and the small slip ring are used for being electrically connected with a cutter head assembly of the tissue closure cutting instrument, and the large slip sheet and the small slip sheet are used for being electrically connected with a wire;

and the reset elastic piece provides elastic force for expanding the tool bit assembly for the conductive slip ring.

7. The tissue closure cutting instrument of claim 6 wherein the knife bar is tubular in configuration with a guide support post disposed therein, the guide support post rotating in synchronism with the knife bar,

and a plurality of mounting grooves are formed on the peripheral wall of the guide support column along the length direction of the guide support column.

8. The tissue closure cutting instrument of claim 7, wherein the knife head assembly comprises an upper jaw fixedly disposed at an end of the knife bar, a lower jaw rotatably coupled to the lower jaw, and a clamping bar slidably disposed through a mounting slot of the guide support post,

the tail end of the upper jaw is provided with a sliding hole, the first end of the clamping pull rod is in sliding connection with the sliding hole, and the clamping pull rod is used for driving the upper jaw to rotate to finish opening and closing actions.

9. The tissue closure cutting instrument of claim 8 wherein the blade assembly further comprises a slider, the slider coupled to the clamping bar,

the slip ring rotor includes a housing and a guide shaft, the housing is formed at the periphery of the guide shaft, an annular space is formed between the housing and the guide shaft, the large slip ring and the small slip ring are formed in the annular space,

the slip ring rotor also comprises a transmission cylinder which is arranged at the outer end of the shell and opposite to the extending direction of the guide shaft,

the transmission cylinder is in transmission connection with the sliding block and is used for transmitting rotation torque.

10. The tissue closure cutting instrument of claim 9, wherein the return spring comprises a spring having an annular configuration with a through hole formed in a sidewall of the spring,

the slip ring stator comprises a stator framework, a guide hole is formed on the stator framework, the guide shaft extends into the guide hole and is in running fit with the guide hole,

the stator framework further comprises a sliding shaft, the sliding shaft and the guide hole are coaxially arranged, the outer wall surface of the sliding shaft is a non-cylindrical surface, and the sliding shaft and the elastic sheet extend into a through hole in the side wall of the elastic sheet.