CN116473600A - Pull ring assembly, first pull ring main body, second pull ring main body and bending adjusting sheath tube - Google Patents

Abstract

The application provides a pull ring subassembly, first pull ring main part, second pull ring main part and accent curved sheath pipe relates to medical instrument technical field. The pull ring assembly includes: a first pull ring main body provided with a plurality of abutting pieces protruding to the distal end side, both sides of the abutting pieces being provided with a pull wire hole penetrating the first pull ring main body in the axial direction; and the second pull ring body is positioned at the distal end side of the first pull ring body and is provided with a bearing part opposite to the pull wire hole. The stay wire hole is worn to establish by the curved line of accent for when the first free end and the second free end of curved line of accent extend to the outside of first pull ring main part, first free end and second free end all can be followed the upper and lower direction in stay wire hole and removed, can avoid the big problem of welding degree of difficulty, also can guarantee its tensile properties simultaneously.

Description

Pull ring assembly, first pull ring main body, second pull ring main body and bending adjusting sheath tube

Technical Field

The application relates to the technical field of interventional medical instruments, in particular to an interventional bending sheath tube and a stay wire ring assembly thereof.

Background

With the improvement of the living standard of people, the incidence rate of cardiovascular diseases is gradually increased. For the treatment of cardiovascular diseases, the treatment process involves the protection of all important organs of the whole body, including brain, spinal cord, lung, liver and other organs, the operation is difficult, the complication occurrence rate is high, and the treatment effect is not ideal. The common treatment mode is that on the basis of the intervention treatment in the aortic cavity, a bracket technology is introduced into trunk surgery, namely, a self-expanding metal bracket is lined at the distal end of an artificial blood vessel, the trunk blood vessel with the bracket is implanted to the distal end of the thoracic descending aorta through an aortic arch incision or a proximal descending aorta incision in an anterograde way through a conveying system, and the proximal end of the trunk artificial blood vessel of the bracket is anastomosed with the reconstructed aortic arch after the release. When the delivery system passes through the aortic arch, the head of the delivery system needs to perform a bending motion to pass smoothly through the aortic arch because the aortic arch is arcuately curved.

The bending-adjusting sheath tube is a sheath tube assembly applied to interventional and minimally invasive treatment operation processes, and comprises a sheath tube and a sheath core, wherein the distal end of the sheath tube can be bent within a certain angle range through the operation of a handle at the proximal end of the sheath tube, and after the distal end of the sheath tube is bent, the tip end of the sheath tube can be led to point to a target position, so that the operation of a bending path in operation is facilitated.

Wherein in the sheath pipe of adjustable bending, use soft acting as go-between to pull the distal end of sheath pipe and make the sheath pipe transfer curved mode of bending be important, wherein the distal end of sheath pipe generally sets up a stereoplasm pull ring, above-mentioned soft acting as go-between is fixed on this stereoplasm pull ring, its welding degree of difficulty is big, not only take place the fracture easily, cause the accent curved function inefficacy of product and tensile strength weak, the phenomenon of arch back can appear in the main part section of sheath pipe simultaneously to along with the biggest angle of transferring bending, the arch back is more obvious, leads to transferring the angular misalignment of bending, transfers the curved stroke loss too big, increases and transfers curved resistance.

Disclosure of Invention

The technical problem to be solved in the application is to provide a bending regulating sheath tube and a pull wire ring assembly thereof, wherein the bending regulating sheath tube can overcome larger bending regulating resistance.

In order to solve the technical problems, the application adopts the following technical scheme:

in a first aspect, the present application provides a pull wire ring assembly comprising: a first tab body provided with a plurality of abutment pieces protruding toward a distal end side, both sides of the abutment pieces being provided with a wire hole penetrating through the first tab body in an axial direction; and the second pull ring body is positioned at the distal end side of the first pull ring body and is provided with a bearing part opposite to the pull wire hole.

In the above-mentioned scheme, the stay wire ring subassembly includes first pull ring main part and second pull ring main part, first pull ring main part provides the hole of acting as go-between that supplies to transfer the curved line to wear to establish, the second pull ring main part is connected on first pull ring main part, and provide the portion of bearing opposite with the hole of acting as go-between, when the downthehole stay wire that is provided with of first pull ring main part transfers the curved line, it can be along the upper and lower direction of acting as go-between to transfer the curved line to bear the portion and the butt piece can be spacing respectively, make the curved line of transferring carry out the removal in-process that a pull was pushed away, transfer the curved line of transferring can not deviate from first pull ring main part, not only can realize the effect of transferring the curved, also can guarantee higher tensile property, reduce the loss of transferring the curved stroke, great curved resistance of transferring has been overcome.

In some embodiments, the distal end side of the first pull ring main body is provided with a plurality of receiving grooves, each of the abutment members is located in one of the receiving grooves, and the wire pulling holes on both sides of each of the abutment members are communicated with the corresponding receiving groove.

In the scheme, the abutting part and the stay wire hole are arranged in the accommodating groove, the bending wire penetrates through the stay wire hole, so that when the bending wire moves up and down along the stay wire hole, the stay wire hole and the abutting part can limit the bending wire, normal movement of the bending wire is guaranteed, the problem of high welding difficulty is solved, multidirectional bending adjustment under a large-tension environment is realized, and meanwhile, each bending adjustment direction is mutually independent and is not influenced.

In some embodiments, the distal side of the first tab body is axially recessed with the receiving groove having an opening.

In some embodiments, the pull ring assembly includes at least two bending lines, each bending line penetrates through the pull holes on two sides of the same abutting piece through the accommodating groove, and each bending line can abut against the supporting portion to support the second pull ring main body.

In the above scheme, the bending adjusting wire is respectively penetrated in the stay wire holes at two sides of the abutting piece, so that when the bending adjusting wire and the abutting piece form abutting connection, two ends of the bending adjusting wire respectively extend to the outer edge of the first pull ring main body, when the bending adjusting handle is used for bending through the bending adjusting wire, the bending adjusting wire can be ensured to have higher tensile property under the action of the abutting piece and the second pull ring main body in the moving process, and accordingly larger bending adjusting resistance is overcome.

In some embodiments, two of the tuning wires are located on opposite sides of the first guy ring body diameter, respectively.

In some embodiments, the distal side of the first tab body is provided with a first clamping portion and the second tab body is provided with a second clamping portion, the first clamping portion being arranged to connect with the second clamping portion.

In the scheme, the first clamping part is matched with the second clamping part, so that the second pull ring main body and the first pull ring main body can be connected and detached, and meanwhile, when the second pull ring main body and the first pull ring main body are connected, the bending line is prevented from falling off from the first pull ring main body.

In some embodiments, the first clamping portion includes a clamping groove and the second clamping portion includes a clamping block, the clamping groove being configured to receive at least a portion of the clamping block. Through the adaptation of joint groove and joint piece, can improve the efficiency of being connected or dismantling of second pull ring main part and first pull ring main part, guarantee that second pull ring main part can not follow first pull ring main part and drop.

In some embodiments, a spacer is formed between every two adjacent accommodating grooves, and the clamping groove is disposed on the spacer. Through setting the joint groove into the opening form, can make things convenient for second pull ring main part screw in or unscrew in first pull ring main part, also make things convenient for the regulation to second pull ring main part, improve its efficiency.

In some embodiments, the snap groove comprises a first cavity and a second cavity in communication with each other, the first cavity having a smaller cross-sectional dimension than the second cavity, the first cavity being closer to a distal side of the first tab body than the second cavity, and the first cavity extending through the first tab body in a direction toward the second tab body to form a notch; the first cavity and the second cavity are communicated with the accommodating groove.

In some embodiments, the clamping block comprises a connecting body and a clamping body which are connected with each other, and the cross-sectional dimension of the clamping body is larger than the cross-sectional dimension of the connecting body; the connecting body is connected with the proximal end side of the second pull ring main body, the clamping body is connected with the connecting body, the clamping body is screwed in or out of the second cavity from the accommodating groove, and the connecting body is screwed in or out of the first cavity from the accommodating groove.

In a second aspect, the present application further provides a first tab body provided with a plurality of abutments protruding toward a distal end side, both sides of the abutments being provided with a wire hole penetrating through the first tab body in an axial direction. Through set up the butt piece on first pull ring main part, and the both sides of butt piece are provided with the hole of acting as go-between respectively, and in the convenient curved line of adjusting penetrated the hole of acting as go-between, be favorable to adjusting the curved handle and transfer the bending action, also can guarantee simultaneously that the curved line of adjusting has higher tensile property.

In some embodiments, the distal side of the first tab body is axially recessed with the receiving groove having an opening.

In some embodiments, the distal side of the first tab body is provided with a first snap connection.

In some embodiments, the first clamping portion includes a clamping groove, a spacer is formed between every two adjacent accommodating grooves, and the clamping groove is disposed on the spacer.

In a third aspect, the present application also provides a second tab body operable to be connected with a first tab body as described above, the second tab body being located on a distal side of the first tab body, the second tab body having a bearing portion opposite a pull wire hole of the first tab body. Through connecting the second pull ring main body on first pull ring main body, and set up on the second pull ring main body and hold the portion of supporting to when setting up the line of turning on the first pull ring main body, can carry out spacingly to it through holding the portion of supporting.

In some embodiments, the second tab body is provided with a second snap connection.

In some embodiments, the second clamping portion comprises a clamping block, the clamping block comprises a connecting body and a clamping body which are connected with each other, and the cross-sectional dimension of the clamping body is larger than the cross-sectional dimension of the connecting body; the connector is connected with the proximal end side of the first pull ring main body, and the clamping body is respectively connected with the connector and the first pull ring main body.

In a fourth aspect, the present application also provides a bend-regulating sheath comprising a pull-wire ring assembly as defined in any one of the preceding claims or a first pull-ring body as defined in the preceding claims.

The bending-adjusting sheath tube provided by the embodiment of the fourth aspect of the present application, because of comprising the pull wire ring assembly described in the first aspect of the present application or comprising the first pull ring main body described in the second aspect of the present application, has all the technical effects of the above-mentioned embodiment, and is not described herein again.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for the users of the art.

FIG. 1 is a schematic structural view of a pull wire ring assembly according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a pull wire ring assembly according to an embodiment of the present disclosure from another perspective;

FIG. 3 is a front view of a pull wire ring assembly disclosed in an embodiment of the present application;

FIG. 4 is a schematic illustration of the construction of a first tab body of a pull ring assembly as disclosed in an embodiment of the present application;

fig. 5 is a schematic connection diagram of a first pull ring body and a bending adjustment line of a pull ring assembly according to an embodiment of the present disclosure.

Reference numerals

100. A pull wire ring assembly; 101. a first tab body; 1011. an abutment; 1012. a wire hole; 1013. a receiving groove; 1014. a first clamping part; 102. a second tab body; 1021. a second clamping part; 10211. a connecting body; 10212. a clamping body; 200. and (5) adjusting a bending line.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments herein, without inventive effort are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the inventive product, are merely for convenience of description of the present application and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood to be specific to the user of ordinary skill in the art.

Example 1

In this application, distal refers to the end of the sheath that is close to the heart of the patient, or that is operated away from the surgeon, and proximal is opposite to the distal, that is operated away from the heart of the patient, or that is, that is available for setting the bending handle.

As shown in fig. 1-3, in a first aspect, the present application provides a pull wire ring assembly 100 comprising: the first tab body 101 and the second tab body 102, the first tab body 101 is provided with a plurality of abutting pieces 1011 protruding toward the distal end side, both sides of the abutting pieces 1011 are provided with wire holes 1012, and the wire holes 1012 are provided to penetrate in the up-down direction (i.e., the axial direction) of the first tab body 101; the second tab body 102 is located at the distal end side of the first tab body 101, and the second tab body 102 has a receiving portion opposite to the wire hole, the receiving portion being a portion of the second tab body for contacting the wire to receive the wire pushing force, and in this embodiment the receiving portion is a portion of the second tab body 102 without a protrusion or recess, but in other embodiments a protrusion or recess may be provided on the second tab body 102 to form the receiving portion.

A bending adjustment wire 200 can be arranged on the first pull ring main body 101 of the pull ring assembly, and when the bending adjustment wire 200 moves in the pull wire hole or passes through the pull wire hole, the bending adjustment wire 200 is U-shaped; it should be noted that, regarding the shape of the bending wire 200 penetrating the wire hole may be a straight line type, a circular arc type, or the like, for example, when the bending wire 200 is made of stainless steel, the bending wire 200 is penetrated into the first tab body 101 to form a "U" shape. In the present application, the wire material adopted by the bending wire 200 needs to have a certain rigidity in the axial direction of the wire, that is, in the extending direction of the wire, so as to satisfy that the formed bending wire 200 can bear and transmit the axial thrust; in addition, the wire used in the bending wire 200 needs to have flexibility, that is, to be bendable in a direction perpendicular to the axial direction of the wire, so that the formed bending wire 200 can penetrate through the wire drawing hole and bear a tensile force. In other embodiments, the material of the bending wire 200 may be nickel-titanium wire, and the bending wire 200 has a certain flexibility and a high structural strength, so that the bending wire 200 is first formed into a "U" shape after being mated with the first tab body 101, and the bending wire 200 is then threaded through the first tab body 101, and the bending wire 200 is also ensured to complete a push-pull process, so that a large bending resistance is overcome, and the first tab body 101 also limits the bending wire, so that the bending wire 200 is always wound around the first tab body 101 in the movement process.

For example, the first tab body 101 may be configured to be cylindrical, the second tab body 102 may also be configured to be cylindrical, the external dimension of the first tab body 101 may be the same as or different from the external dimension of the second tab body 102, and when the second tab body 102 is connected to the first tab body 101, the closed accommodating groove 1013 may be formed, so that when the bending line 200 performs a push-pull motion, the supporting portion and the abutting piece 1011 of the second tab body 102 respectively form a limit on the bending line 200.

The bending adjustment wires 200 are provided with at least two bending adjustment wires 200, the two bending adjustment wires 200 are oppositely arranged, and each bending adjustment wire 200 is respectively arranged in a penetrating manner in a pulling wire hole 1012 on two sides of the abutting piece 1011, so that the bending adjustment wires 200 are abutted with the bearing part of the second pull ring main body 102 to support the second pull ring main body 102, and the proximal end side of the bending adjustment wires extends to the outer side of the first pull ring main body 101 and is connected with a bending adjustment handle. In this embodiment, four bending lines 200 are disposed in the wire hole at intervals (for example, four bending lines 200 are disposed in the wire hole at equal intervals), and two groups of four bending lines 200 are disposed, two bending lines 200 in each group are disposed oppositely, so that one bending line 200 in the same group completes the pushing process, and the other bending line 200 completes the pulling process.

For example, the abutment member 1011 may be configured as a circular arc, the abutment member 1011 may be integrally formed with the first tab body 101 (for example, the distal end side of the first tab body 101 may be directly machined to form the abutment member 1011), or other fixing methods, such as welding, may be adopted, and the bending adjustment wire 200 may be fixed by an integral molding process or other fixing methods, so that when the bending adjustment handle applies a pulling force to the bending adjustment wire 200 during a pushing-pulling motion, the abutment member 1011 contacts the bending adjustment wire 200, thereby limiting the bending adjustment wire 200 and avoiding the problem of excessive local stress of the bending adjustment wire 200 during the moving process.

The bending wire 200 is inserted into the wire hole 1012 on both sides of the same abutting piece 1011, and extends from the wire hole 1012 to the outer side of the first tab body 101 to form the first free end and the second free end, where the first free end and the second free end are both located on the same side (proximal side) of the first tab body 101; it may be appreciated that, in the actual use process of the bending wire 200, the bending handle is connected to the first free end and the second free end, and applies a tensile force to the first free end and the second free end of the bending wire 200 on one side of the first tab main body 101, so that the bending wire 200 moves integrally with respect to the first tab main body 101, and at the same time, the bending handle applies a tensile force or a pushing force to the first free end and the second free end of the bending wire 200 on the other side of the first tab main body 101, so that the two bending wires 200 can move with respect to the first tab main body 101 through the cooperation between the two opposite bending wires 200, thereby realizing bending of the bending sheath.

In the above-mentioned scheme, one end of the bending wire 200 is threaded through one of the wire holes 1012 and is wound around the abutting piece 1011, and is threaded out from the other wire hole 1012, so that when the first free end and the second free end of the bending wire 200 extend to the outer side of the first tab main body 101 (i.e., the outer edge of the proximal end side of the first tab main body 101), the first free end and the second free end can both move along the up-down direction of the wire hole 1012, which has higher tensile property, can overcome larger bending resistance, and can avoid the problem of large welding difficulty while guaranteeing the tensile property.

As shown in fig. 4, the distal end side of the first tab body 101 is provided with receiving grooves 1013, each of the receiving grooves 1013 is configured to receive the abutment member 1011, and the wire holes 1012 on both sides of each of the abutment members 1011 communicate with the corresponding receiving groove 1013. For example, the first tab body 101 is disposed vertically, and a portion at the bottom of the first tab body 101 is concavely disposed to form the accommodating groove 1013, where the size of the accommodating groove 1013 may be set according to the actual design size and the distance between the abutment 1011 and the wire hole 1012.

In the above-mentioned scheme, be provided with butt spare 1011 and stay wire hole 1012 in the holding tank 1013, adjust curved line 200 and wear to locate to stay wire hole 1012 for when adjusting curved line 200 and carrying out the osculum along stay wire hole 1012, stay wire hole 1012 and butt spare 1011 can both form spacing to adjust curved line 200 nature, guarantee to adjust curved line 200's normal movement.

Referring to fig. 4 again, the accommodating grooves 1013 are provided with a plurality of accommodating grooves 1013 along the periphery of the first tab body 101 at intervals, the accommodating grooves 1013 may be provided with equal intervals, the specific number of the accommodating grooves 1013 may be set according to practical situations, for example, four accommodating grooves 1013 are provided with equal intervals, every two accommodating grooves 1013 are provided with opposite arrangement, and two accommodating grooves in which the bending lines 200 are matched for realizing one bending direction, that is, the bending handles apply a pulling force to one of the bending lines 200 in one accommodating groove, apply a pushing force to the other bending line 200 in the other accommodating groove (the two accommodating grooves are provided opposite), the bending lines 200 in the other accommodating groove do not apply a force, so that bending in one direction is realized, and further, the bending directions are mutually independent and are not affected under a large pulling force environment by arranging a plurality of accommodating grooves 1013 in the first tab body 101.

In some embodiments, the distal end side of the first tab body 101 is concavely disposed in the up-down direction (axial direction) to form the accommodation groove 1013 in an opening shape. It should be noted that, the opening of the accommodating groove 1013 is downward, and the first free end and the second free end of the bending wire 200 are inserted from the wire holes 1012 on both sides of the abutting piece 1011 of the accommodating groove 1013 to the proximal end side of the first tab body 101 for connecting with the bending handle; in other embodiments, the accommodating groove 1013 may be configured as an annular hole, i.e., penetrating along a direction from the sidewall of the first tab body 101 to the vertical center line thereof, so as to form the accommodating groove 1013 having an abutment portion at the bottom (i.e., the bottom of the accommodating groove 1013 is not provided with the opening), which can limit the pushing force of the bending line 200 and prevent the bending line 200 from being pulled out from the first tab body 101.

In some embodiments, the distal end side of the first tab body 101 is provided with a first clamping portion 1014, the second tab body 102 is provided with a second clamping portion 1021, the bearing portion is formed between two adjacent second clamping portions 1021, the first clamping portion 1014 is configured to connect with the second clamping portion 1021, that is, the first tab body 101 and the second tab body 102 are clamped, other connection manners are not excluded, for example, the second tab body 102 is screwed onto the first tab body 101 by a thread or the like, so long as the bending adjustment line 200 can be limited.

In the above-mentioned scheme, the first clamping portion 1014 cooperates with the second clamping portion 1021, so that the second tab body 102 and the first tab body 101 can be connected and detached, and the bending line 200 is prevented from falling out from the first tab body 101 when the second tab body 102 and the first tab body 101 are connected.

Referring to fig. 1-2, the first clamping portion 1014 includes a clamping groove, and the second clamping portion 1021 includes a clamping block, and the clamping groove is configured to receive at least a portion of the clamping block. Specifically, the first clamping portion 1014 is disposed on the distal end side of the first tab body 101, the accommodating groove 1013 is disposed on the distal end side of the first tab body 101, and the first clamping portion 1014 and the accommodating groove 1013 are staggered, so that one first clamping portion 1014 is disposed between two adjacent accommodating grooves 1013, so that when the first clamping portion 1014 and the second clamping portion 1021 are assembled, the second clamping portion 1021 corresponds to the accommodating groove 1013, and then is screwed into the first clamping portion 1014, and due to the plurality of accommodating grooves 1013, the second clamping portion 1021 can be screwed into or out of the first clamping portion 1014 from any one of the accommodating grooves 1013, so that the connection or detachment efficiency of the second tab 102 and the first tab body 101 can be improved, and the second tab 102 is ensured not to fall off from the first tab body 101.

Referring to fig. 4 again, the clamping groove is disposed at the periphery of the first tab body 101, and each of the accommodating grooves 1013 divides the clamping groove into two sections (i.e., a space is formed between every two adjacent accommodating grooves 1013, the clamping groove is disposed on the space), the clamping groove includes a first cavity and a second cavity that are mutually communicated, the cross-sectional dimension of the first cavity is smaller than that of the second cavity, the first cavity is closer to the distal end side of the first tab body than the second cavity, and the first cavity has a notch (i.e., a first notch), the second cavity is provided with a second notch, and the opening direction of the first notch is set towards the second tab body 102, and the opening direction of the second notch is set towards the accommodating groove, wherein the first notch of the clamping groove is used for avoiding the connector 10211 of the clamping block, and the second notch is used for screwing the connector 10211 into the clamping block or screwing out of the slot 102101. Through setting the joint groove into the opening form, can make things convenient for second pull ring main part 102 screw in or unscrew in first pull ring main part 101, also make things convenient for the regulation to second pull ring main part 102, improve its efficiency.

In some embodiments, the clamping blocks may be at least two, and the two clamping blocks are symmetrically distributed on the second tab main body 102, the clamping blocks include a connecting body 10211 and a clamping body 10212 that are connected to each other, the connecting body 10211 is connected to the second tab main body 102, the cross-sectional dimension of the clamping body 10212 is larger than the cross-sectional dimension of the connecting body 10211, the clamping body 10212 is located at a side of the connecting body 10211 far away from the second tab main body 102, the middle position of the clamping body 10212 is connected with the connecting body 10211, the clamping body 10212 is screwed into or screwed out of the second cavity from the accommodating groove 1013, the connecting body 10211 and the clamping body 10212 may be integrally formed, or may be welded or the like, the connecting body 10211 and the clamping body 10212 form a joint T with the clamping body 10212, and then the clamping body 10212 is integrally formed, and the clamping body 10212 is integrally connected to the clamping body 10211, and the clamping body is formed into a shape of a letter "T" shape.

Example two

In some embodiments, as shown in fig. 4, the first tab body is provided with a plurality of abutting pieces protruding toward the distal end side, both sides of each abutting piece are provided with a wire hole penetrating through the first tab body in the axial direction, the distal end side of the first tab body is arranged along the axial recess to form an open-like accommodation groove, the distal end side of the first tab body is provided with a first clamping portion, the first clamping portion includes a clamping groove, the clamping groove is arranged at the periphery of the first tab body 101, each accommodation groove 1013 is divided into two sections (i.e., a space is formed between every two adjacent accommodation grooves 1013, the clamping groove is arranged on the space), the clamping groove includes a first cavity and a second cavity which are mutually communicated, the cross-sectional size of the first cavity is smaller than that of the second cavity, the first cavity is closer to the distal end side of the first tab body than the second cavity, and the first tab body is provided with a notch facing the first cavity 102. That is, in the actual use process of the first tab body 101, the bending wire 200 is inserted into the wire hole 1012, the connection mode of the bending wire 200 is the same as that of the above embodiment, and two sets of bending directions may be provided on the first tab body 101, each set of bending directions corresponds to two bending wires 200 and four wire holes, and the two bending wires 200 are oppositely disposed on the first tab body 101.

Example III

In some embodiments, the second tab body 102 may be used to connect with the first tab body 101, where the second tab body 102 is located at a distal end side of the first tab body, the second tab body 102 has a bearing portion opposite to a wire hole of the first tab body 101, the first tab body 101 is provided with a first clamping portion, one end of the second tab body 102 is provided with a second clamping portion connected with the first clamping portion, where a specific structural form of the first clamping portion and the second clamping portion is not limited, for example, the second clamping portion includes a clamping block, the clamping block includes a connecting body 10211 and a clamping body 10212 connected to each other, the connecting body 10211 is connected with the second tab body 102, a cross-sectional dimension of the clamping body 10212 is greater than a cross-sectional dimension of the connecting body 10211, the clamping body 10212 is located at a side of the connecting body 10211 away from the second tab body 102, and the connecting body 10212 can be removed from the first tab body 102, so long as the connecting body 102 and the first tab body 102 can be removed.

Example IV

In some embodiments, the present application also provides a buckle-adjusting sheath comprising a pull-ring assembly 100 or a first pull-ring body 101; that is, the bending-adjusting sheath tube can be used for completing the bending-adjusting process by arranging the bending-adjusting wire 200 on the first pull-ring main body, and detaching and connecting the second pull-ring main body 102 on the first pull-ring main body 101, or can be used for completing the bending-adjusting process by directly arranging the bending-adjusting wire 200 on the first pull-ring main body 101.

The bending sheath tube provided in the second embodiment of the present application, because of including the pull wire ring assembly 100 described in the first aspect, has all the technical effects of the above embodiments, and will not be described herein.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (15)

1. A pull ring assembly, comprising:

a first tab body provided with a plurality of abutment pieces protruding toward a distal end side, both sides of the abutment pieces being provided with a wire hole penetrating through the first tab body in an axial direction;

and the second pull ring body is positioned at the distal end side of the first pull ring body and is provided with a bearing part opposite to the pull wire hole.

2. The pull-string ring assembly according to claim 1, wherein the distal end side of the first pull-string body is provided with a plurality of receiving grooves, each of the abutment members is located in one of the receiving grooves, and the pull-string holes on both sides of each of the abutment members are communicated with the corresponding receiving groove.

3. The pull-ring assembly of claim 2, wherein the distal side of the first pull-ring body is axially recessed with the receiving slot having an opening.

4. The pull-ring assembly of claim 2, wherein the distal side of the first pull-ring body is provided with a first clamping portion and the second pull-ring body is provided with a second clamping portion, the first clamping portion being configured to connect with the second clamping portion.

5. The pull wire ring assembly of claim 4, wherein the first clamping portion comprises a clamping groove and the second clamping portion comprises a clamping block, the clamping groove configured to receive at least a portion of the clamping block.

6. The pull-ring assembly of claim 5, wherein a spacer is formed between each two adjacent receiving slots, and the clamping slot is disposed on the spacer.

7. The pull wire ring assembly of claim 6, wherein the clamping groove comprises a first cavity and a second cavity in communication with each other, the first cavity having a smaller cross-sectional dimension than the second cavity, the first cavity being closer to a distal side of the first pull ring body than the second cavity, and the first cavity extending through the first pull ring body in a direction toward the second pull ring body to form a notch; the first cavity and the second cavity are communicated with the accommodating groove.

8. The pull wire ring assembly of claim 7, wherein the clamping block comprises a connecting body and a clamping body which are connected with each other, and the cross-sectional dimension of the clamping body is larger than the cross-sectional dimension of the connecting body; the connecting body is connected with the proximal end side of the second pull ring main body, the clamping body is connected with the connecting body, the clamping body is screwed in or out of the second cavity from the accommodating groove, and the connecting body is screwed in or out of the first cavity from the accommodating groove.

9. The pull-ring assembly according to any one of claims 1 to 8, wherein the pull-ring assembly comprises at least two bending lines, each bending line penetrates through the pull-wire holes on two sides of the same abutting piece through the accommodating groove, and each bending line can abut against the supporting portion to support the second pull-ring main body.

10. The pull-string ring assembly according to claim 9, wherein the two bend-adjusting wires are located on opposite sides of the diameter of the first pull-string ring body, respectively.

11. The first pull ring main body is characterized in that the first pull ring main body is provided with a plurality of abutting pieces protruding towards the far end side, and both sides of each abutting piece are provided with a pull wire hole penetrating through the first pull ring main body in the axial direction.

12. The first tab body of claim 11 wherein the distal side of the first tab body is axially recessed with an open receiving slot; the remote side of first pull ring main part is provided with first joint portion, first joint portion includes the joint groove, every two adjacent form a spacing portion between the holding tank, the joint groove set up in on the spacing portion.

13. A second tab body, which is intended to be connected to a first tab body as claimed in any one of claims 11-12, which second tab body is located on the distal side of the first tab body, which second tab body has a bearing portion opposite the pull wire hole of the first tab body.

14. The second tab body of claim 13 wherein the second tab body is provided with a second clip portion comprising a clip block comprising a connector and a clip body connected to each other, and wherein the cross-sectional dimension of the clip body is greater than the cross-sectional dimension of the connector; the connector is connected with the proximal end side of the second pull ring main body, and the clamping body is respectively connected with the connector and the first pull ring main body.

15. A bend-regulating sheath comprising a pull-wire ring assembly according to any one of claims 1 to 9 or a first pull-ring body according to claims 11 to 12.