CN218943283U

CN218943283U - Snake bone assembly of disposable medical endoscope

Info

Publication number: CN218943283U
Application number: CN202123250265.1U
Authority: CN
Inventors: 谢民政; 谢梦蕾; 史健
Original assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Current assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-05-02
Anticipated expiration: 2031-12-22

Abstract

The utility model relates to a snake bone assembly of a disposable medical endoscope, which comprises a snake bone structure formed by a head end joint ring, a hose joint ring, a plurality of corner joint rings and traction steel wire ropes, wherein a woven mesh protection pipe and a rubber protection pipe are arranged on the periphery of the snake bone structure, one end of the head end joint ring is provided with a rear rotating ball head which is symmetrically arranged along the axial direction of the head end joint ring, two ends of the corner joint ring are respectively provided with a middle rotating ball head and a middle ball socket which are symmetrically arranged along the axial direction of the head end joint ring, one end of the hose joint ring is provided with a front ball socket which is symmetrically arranged along the axial direction of the head end joint ring, the rear rotating ball head of the head end joint ring is clamped into the middle of an adjacent corner joint ring and is in inner rotating fit with the middle of the adjacent corner joint ring, and the middle rotating ball head of the corner joint ring adjacent to the hose joint ring is clamped into the front ball socket of the hose joint ring and is in rotating fit with the middle ball socket of the adjacent corner joint ring. The utility model not only greatly reduces the production cost, but also avoids the situation that the patient is cross-infected due to the fact that the disinfection is not in place because of repeated use, and is suitable for disposable use.

Description

Snake bone assembly of disposable medical endoscope

Technical Field

The utility model relates to a snake bone, in particular to a snake bone assembly of a disposable medical endoscope, and belongs to the technical field of medical appliances.

Background

For many years, the medical soft endoscope has very wide application in domestic and foreign fields, is inserted into the digestive system (coarse endoscope, disposable esophagoscope, gastroscope, duodenoscope, colonoscope and other four-way bent angle endoscope) of human body, and is an irreplaceable diagnosis and treatment technology in modern medical clinic.

1) The medical endoscope is required to be reused, so that cross infection among patients is avoided, and the endoscope cannot be cleaned and disinfected cleanly by one hundred percent even through a strict and complex disinfection procedure after the endoscope is used by related patients; and the cleaning and disinfecting cost is high, and one endoscope needs to be subjected to cleaning and disinfecting treatment in 6-10 steps after being used, which takes at least 20 minutes.

2) The reusable endoscope has high cleaning and sterilizing cost; maintenance or repair costs are also high; also medical endoscopes are expensive.

3) In order to avoid the problems of cross infection, disinfection, maintenance and storage and other high cost, a disposable endoscope is required to be designed and developed as soon as possible, the disposable endoscope consists of main parts such as a snake bone at a disposable bending part, a disposable insertion tube, disposable imaging, illumination and the like, and the conventional disposable medical endoscope, namely the disposable snake bone, is still expensive, so that the burden is very heavy, and the use requirement cannot be met.

Disclosure of Invention

The purpose of the utility model is that: the snake bone assembly is more flexible and accurate in bent angle rotation, greatly reduces production cost, and is applicable to disposable medical endoscopes because cross infection of patients caused by insufficient disinfection due to repeated use is avoided.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a snake bone sub-assembly of disposable medical endoscope, includes head end connector, hose connector, a plurality of bent angle connector, knits net pillar, rubber protection tube and realizes the pull wire rope of snake bone bent angle, head end connector, hose connector and a plurality of bent angle connector link as an organic whole through pull wire rope and constitute snake bone structure, and a plurality of bent angle connector is located between head end connector and the hose connector, the periphery of snake bone structure is equipped with knits net pillar, and knits net pillar's periphery is equipped with rubber protection tube, and its innovation point lies in:

the head end joint ring, the hose joint ring and the plurality of corner joint rings are all hard plastic injection molding pieces or powder metallurgy injection molding pieces,

the end face of one end of the head end joint ring is provided with a rear rotating ball head which is symmetrically arranged along the axial direction of the end face, the head end joint ring is provided with four front rope holes which are uniformly arranged along the circumferential direction of the head end joint ring, the rear rotating ball head is provided with a first rope hole communicated with one of the front rope holes,

the two ends of the corner joint ring are respectively provided with a middle ball joint and a middle ball socket which are symmetrically arranged along the axial direction of the corner joint ring, the middle ball joint of one corner joint ring is clamped into the middle ball socket of the other corner joint ring which rotates by 90 degrees and is in rotary fit, the corner joint ring is provided with four middle rope penetrating holes which are uniformly arranged along the circumferential direction of the corner joint ring, the middle ball joint is provided with a second rope penetrating hole which is communicated with one middle rope penetrating hole, the middle ball socket is communicated with the rest middle rope penetrating hole,

the hose connecting ring is provided with four rear rope holes which are uniformly arranged along the circumferential direction of the hose connecting ring, the front ball socket is communicated with one of the rear rope holes,

the rear rotary ball head of the head end joint ring is clamped into the middle ball socket of the adjacent bent angle joint ring and is in rotary fit with the middle rotary ball head of the bent angle joint ring adjacent to the hose joint ring, is clamped into the front ball socket of the hose joint ring and is in rotary fit with the middle rotary ball head of the bent angle joint ring,

the traction steel wire rope sequentially penetrates through the front rope penetrating hole of the head end connecting ring, the middle rope penetrating hole of the bent angle connecting ring and the rear rope penetrating hole of the hose connecting ring respectively, one end of the steel wire rope is fixed with the head end connecting ring, the other end of the steel wire rope penetrates out of the hose connecting ring, and the snake bone structure can be bent in different directions by controlling the traction steel wire rope.

In the technical scheme, cross-shaped reinforcing ribs or straight-shaped reinforcing ribs are arranged in the inner cavities of the head end connecting ring, the bent angle connecting ring and the hose connecting ring.

In the above technical scheme, the hose connector further comprises a central steel wire rope, cross-shaped reinforcing ribs are arranged in the inner cavities of the head end connector, the corner connector and the hose connector, the cross-shaped reinforcing ribs of the head end connector, the corner connector and the hose connector are provided with central rope holes, the central steel wire rope penetrates into the central rope holes of the head end connector, the corner connector and the hose connector, and two ends of the central steel wire rope are fixedly connected with the head end connector and the hose connector respectively.

In the above technical scheme, the both ends of center wire rope are equipped with the fixed ring of steel rope respectively, and the external diameter of the fixed ring of steel rope is greater than the aperture of center wire rope hole, the fixed ring of steel rope of center wire rope one end is established on the head end joint circle and is located the outside of the cross strengthening rib of head end joint circle, the fixed ring of steel rope of center wire rope other end is established on the hose joint circle and is located the outside of the cross strengthening rib of hose joint circle.

In the above technical scheme, be equipped with the fixed cover of steel cable on the inner wall of head end connector, the one end and the fixed cover fixed connection of steel cable of traction wire rope, the external diameter of the fixed cover of steel cable is greater than the preceding rope hole's of head end connector aperture.

In the above technical scheme, be equipped with the back bridge on the terminal surface of head end joint circle one end, the back bridge links as an organic wholely with the back swivel, and the through-hole that the back bridge had link up each other with preceding reeving hole and first reeving hole, be equipped with the bridge on the terminal surface of bent angle joint circle one end, the bridge links as an organic wholely with middle swivel, the through-hole that the bridge had link up each other with well reeving hole and second reeving hole.

In the above technical scheme, the middle rope threading hole communicated with the middle ball socket of the corner joint ring comprises a taper hole and a straight hole which are communicated with each other, the taper hole is close to the center of the middle ball socket, the rear rope threading hole communicated with the front ball socket of the hose joint ring comprises a taper hole and a straight hole which are communicated with each other, and the taper hole is close to the center of the front ball socket.

In the above technical solution, if the head end connector, the hose connector and the plurality of corner connectors are hard plastic injection molding pieces, the head end connector, the hose connector and the plurality of corner connectors are nylon injection molding pieces, or polyoxymethylene injection molding pieces, or polytetrafluoroethylene injection molding pieces; if the head end joint ring, the hose joint ring and the plurality of corner joint rings are powder metallurgy injection pieces, the head end joint ring, the hose joint ring and the plurality of corner joint rings are stainless steel powder metallurgy injection pieces or aluminum alloy powder metallurgy injection pieces.

In the technical scheme, nylon net fixing rings are respectively arranged on the peripheries of the two ends of the woven net protective tube, so that the connection between the two ends of the woven net protective tube and the head end joint ring and the hose joint ring can be enhanced.

In the above technical scheme, the front end sheath is arranged at the end part of the head end connector and is positioned at the periphery of one end of the rubber protection tube.

The utility model has the positive effects that: after the snake bone assembly of the disposable medical endoscope is adopted, as the head end joint ring, the hose joint ring and the plurality of corner joint rings are all hard plastic injection molding parts or powder metallurgy injection parts, the head end joint ring, the corner joint ring and the hose joint ring have low material cost, are convenient for die production and have low production cost,

the traction steel wire rope sequentially penetrates through the front rope penetrating hole of the head end connecting ring, the middle rope penetrating hole of the bent angle connecting ring and the rear rope penetrating hole of the hose connecting ring respectively, one end of the steel wire rope is fixed with the head end connecting ring, the other end of the steel wire rope penetrates out of the hose connecting ring, the snake bone structure can be bent in different directions by controlling the traction steel wire rope,

therefore, the head end joint ring, the corner joint ring and the hose joint ring in the snake bone structure are matched and rotated through the ball joint head and the ball socket, so that the snake bone structure is simpler in overall structure, flexible and accurate in rotation among the joint rings, high in assembly efficiency and capable of realizing mass production.

In summary, the utility model has the advantages that:

first, the utility model has low cost of each connecting ring material, compared with the special stainless steel pipe or stainless steel rod selected by the prior product, the utility model has much lower cost, is convenient for the mould production, greatly reduces the production cost, lays a good economic foundation for one-time use,

secondly, each joint ring in the snake bone structure of the utility model rotates through the matching of the ball rotating head and the ball socket, so that the whole structure of the snake bone device is more reliable and stable, the condition that the ball rotating head is separated from the ball socket can not occur, the rotation is more flexible and accurate, meanwhile, the utility model has high production efficiency and low production cost, is suitable for mass production, is suitable for clinical disposable use,

thirdly, the design of the traction structure in the snake bone structure is smoother, the traction steel wire rope is in the rope threading holes of all parts, the moving friction coefficient is low, the traction bending angle is easier,

fourth, the utility model is greatly reduced in cost, is suitable for examination and diagnosis of digestive system and other diseases, or general investigation of related diseases, and meanwhile, the utility model can replace the technical proposal that endoscopes in the prior art such as gastroscopes, duodenoscopes, colonoscopes and the like need to be reused, so that strict and complex disinfection is not needed, cross infection among patients is not worried about,

fifth, because the production amount of the disposable snake bone product is larger, the disposable snake bone product is also larger in treatment amount as medical waste material after use, so that the disposable snake bone product can be made of environment-friendly and easily degradable environment-friendly plastics, can reduce environmental pollution and effectively protect the environment.

Drawings

FIG. 1 is a schematic diagram of the structure of an embodiment of the present utility model;

FIG. 2 is a schematic structural view of the snake bone structure of FIG. 1;

FIG. 3 is a schematic view of the structure of the head end ring of FIG. 2;

FIG. 4 is a right side schematic view of FIG. 3;

FIG. 5 is a schematic cross-sectional view A-A of FIG. 3;

FIG. 6 is a schematic view of the corner fitting of FIG. 2;

FIG. 7 is a right side schematic view of FIG. 6;

FIG. 8 is a left side schematic view of FIG. 6;

FIG. 9 is a schematic cross-sectional view of B-B of FIG. 6;

FIG. 10 is a schematic view of the hose coupling of FIG. 2;

FIG. 11 is a left side schematic view of FIG. 10;

FIG. 12 is a schematic cross-sectional C-C view of FIG. 10.

Detailed Description

The utility model is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, a snake bone assembly of a disposable medical endoscope comprises a head end joint ring 1, a hose joint ring 3, a plurality of bent angle joint rings 2, a net-woven protective tube 9, a rubber protective tube 10 and a traction steel wire rope 4 for realizing snake bone bent angles, wherein the head end joint ring 1, the hose joint ring 3 and the plurality of bent angle joint rings 2 are connected into a whole through the traction steel wire rope 4 to form a snake bone structure, the plurality of bent angle joint rings 2 are positioned between the head end joint ring 1 and the hose joint ring 3, the periphery of the snake bone structure is provided with the net-woven protective tube 9, the periphery of the net-woven protective tube 9 is provided with a rubber protective tube 10, the net-woven protective tube 9 can be a nylon net-woven protective tube or a terylene net-woven protective tube, the utility model preferably uses the nylon net-woven protective tube, replaces the stainless steel wire net-woven protective tube in the prior art, greatly reduces the production cost, the rubber protective tube 10 is a protective tube, is a sealing layer,

the head end joint ring 1, the hose joint ring 3 and the plurality of corner joint rings 2 are all hard plastic injection molding pieces or powder metallurgy injection molding pieces,

the end face of one end of the head joint ring 1 is provided with a rear rotating ball head 11 which is symmetrically arranged along the axial direction, the head joint ring 1 is provided with four front rope holes 12 which are uniformly arranged along the circumferential direction, the rear rotating ball head 11 is provided with a first rope hole 13 which is communicated with one of the front rope holes 12,

in order to realize four-direction bending angles of the snake bone device, the two ends of the corner joint ring 2 are respectively provided with a middle ball joint 21 and a middle ball socket 22 which are symmetrically arranged along the axial direction, when two adjacent corner joint rings are connected and assembled, the latter corner joint ring needs to be assembled with the former corner joint ring after rotating by 90 degrees, namely the middle ball joint 21 of one corner joint ring 2 is clamped into the middle ball socket 22 of the other corner joint ring 2 after rotating by 90 degrees and is rotationally matched, the corner joint ring 2 is provided with four middle ball socket holes 23 which are uniformly arranged along the circumferential direction, the middle ball joint ring 21 is provided with a second rope penetrating hole 24 which is communicated with one middle rope penetrating hole 23, the middle ball joint ring 22 is communicated with the rest middle rope penetrating hole 23,

the hose connector 3 is provided with a front ball socket 31 which is symmetrically arranged along the axial direction at one end, the hose connector 3 is provided with four rear rope holes 32 which are circumferentially arranged at 90 degrees intervals, the front ball socket 31 is communicated with one of the rear rope holes 32,

the rear swivel ball 11 of the head end joint ring 1 is clamped into the middle ball socket 22 of the adjacent bent angle joint ring 2 and is in rotary fit, the middle swivel ball 21 of the adjacent bent angle joint ring 2 of the hose joint ring 3 is clamped into the front ball socket 31 of the hose joint ring 3 and is in rotary fit,

the traction steel wire rope 4 sequentially penetrates through the front rope penetrating hole 12 of the head end connecting ring 1, the middle rope penetrating hole 23 of the bent angle connecting ring 2 and the rear rope penetrating hole 32 of the hose connecting ring 3, one end of the steel wire rope 4 is fixed with the head end connecting ring 1, the other end of the steel wire rope 4 penetrates out of the hose connecting ring 3, and the snake bone structure can be bent in different directions by controlling the traction steel wire rope 4.

As shown in fig. 1 and 2, for convenience, one end (head) of the traction steel wire rope 4 is fixedly connected with the head end joint ring 1, a steel wire rope fixing sleeve 8 is arranged on the inner wall of the head end joint ring 1, one end of the traction steel wire rope 4 is fixedly connected with the steel wire rope fixing sleeve 8, and the outer diameter of the steel wire rope fixing sleeve 8 is larger than the aperture of a front rope threading hole 12 of the head end joint ring 1. The four traction steel wire ropes 4 have the advantage of smoothly and smoothly traction the bent angle, namely the bent part of the endoscope can be bent in four directions of up, down, left and right, and the size of the bent angle can be controlled.

If the two traction steel wire ropes 4 are provided, the snake bone assembly of the disposable medical endoscope can realize bending angles in the upper direction and the lower direction, and the structure is that: the rear swivel ball 11 of the head end joint ring 1 is clamped into the middle ball socket 22 of the adjacent bent angle joint ring 2 and is in rotary fit, the middle swivel ball 21 of the bent angle joint ring 2 adjacent to the hose joint ring 3 is clamped into the front ball socket 31 of the hose joint ring 3 and is in rotary fit, the middle swivel ball 21 of one bent angle joint ring 2 in the adjacent bent angle joint ring 2 is clamped into the middle ball socket 22 of the other bent angle joint ring 2 and is in rotary fit, and the middle swivel ball 21 and the middle ball socket 22 at two ends of the bent angle joint ring 2 are coaxial.

As shown in fig. 5, in order to make the structure of the present utility model more reasonable, the end face at one end of the head end connector 1 is provided with a rear connecting bridge 14, the rear connecting bridge 14 is connected with the rear swivel 11 into a whole, the through hole of the rear connecting bridge 14 is mutually communicated with the front rope threading hole 12 and the first rope threading hole 13, the end face at one end of the corner connector 2 is provided with a connecting bridge 25, the connecting bridge 25 is connected with the middle swivel 21 into a whole, and the through hole of the connecting bridge 25 is mutually communicated with the middle rope threading hole 23 and the second rope threading hole 24.

As shown in fig. 6 and 9, in order to facilitate the free turning of the traction wire rope in the rope threading hole, so that the effect is better when turning the bent angle, the middle rope threading hole 23 communicated with the middle ball socket 22 of the bent angle joint ring 2 comprises a taper hole and a straight hole which are communicated with each other, the taper hole is close to the center of the middle ball socket 22, and the rear rope threading hole 32 communicated with the front ball socket 31 of the hose joint ring 3 comprises a taper hole and a straight hole which are communicated with each other, and the taper hole is close to the center of the front ball socket 31. The first rope threading hole 13 of the rear ball 11 of the head joint ring 1 is provided with a section of taper hole, and the second rope threading hole 24 of the middle ball 21 of the corner joint ring 2 is also provided with a section of taper hole, so that the corner can freely turn more smoothly.

Further, in order to reduce the production cost of the utility model and be suitable for mass production, if the head end connector 1, the hose connector 3 and the plurality of corner connectors 2 are hard plastic injection molding pieces, the head end connector 1, the hose connector 3 and the plurality of corner connectors 2 are nylon injection molding pieces, or polyoxymethylene injection molding pieces, or polytetrafluoroethylene injection molding pieces; if the head end joint ring 1, the hose joint ring 3 and the plurality of corner joint rings 2 are powder metallurgy injection pieces, the head end joint ring 1, the hose joint ring 3 and the plurality of corner joint rings 2 are stainless steel powder metallurgy injection pieces or aluminum alloy powder metallurgy injection pieces.

In order to improve the compressive strength of the parts and to provide a certain deformation resistance when the bending snake bone device is pulled to bear force, as shown in fig. 4, 7, 8 and 11, the inner cavities of the head end joint ring 1, the bending joint ring 2 and the hose joint ring 3 are respectively provided with cross-shaped reinforcing ribs 5 or straight-line reinforcing ribs.

As shown in fig. 1 and 2, in order to facilitate the installation of the snake bone device before the traction steel wire rope, all parts of the snake bone device can be connected in series by using the central steel wire rope 6 to form a whole, the total length between two fixed heads of the central steel wire rope is designed according to the requirement of the required positioning bent angle of the snake bone, the utility model further comprises the central steel wire rope 6, cross-shaped reinforcing ribs 5 are arranged in the inner cavities of the head end joint ring 1, the bent angle joint ring 2 and the hose joint ring 3, the cross-shaped reinforcing ribs 5 of the head end joint ring 1, the bent angle joint ring 2 and the hose joint ring 3 are provided with central rope penetrating holes 51, the central steel wire rope 6 penetrates into the central rope penetrating holes 51 of the head end joint ring 1, the bent angle joint ring 2 and the hose joint ring 3, and the two ends of the central steel wire rope 6 are fixedly connected with the head end joint ring 1 and the hose joint ring 3 respectively.

I.e. the central wire rope 6 of the utility model has the advantage that:

(1) The device has the advantages of effectively controlling the maximum bending angle designed by different medical endoscopes, and has the technical characteristics that after the central steel wire rope and a set of snake bone joint rings are assembled, the device is technically characterized in that:

firstly, the total length of the central steel wire rope is required to be longer than that of the central hole of the whole snake bone component, and a process gap is required to be reserved;

secondly, the length of the central steel wire rope is a gap capable of moving back and forth in the central hole of the whole snake bone component;

thirdly (the greatest advantage), the length of the dimension data which is longer than the total length of the snake bone component is controlled by controlling the total length of the central steel wire rope, so that the bending angle is controlled to be large or small. The larger the length "size data" is, the larger the bending angle is; conversely, the smaller this "dimensional data" is, the smaller the bending angle (because the angle of the maximum bending angle is different for different bending portions of the medical flexible endoscope).

(2) The product can not be scattered randomly in the production turnover of the upper working procedure and the lower working procedure, and the product is protected:

the central steel wire rope is used for connecting the snake bone end joint ring, the snake bone bent angle joint ring and the snake bone hose joint ring without rivet, and after the initial connection is integrated, each snake bone joint ring is not scattered in the turnover or transportation between the upper working procedure and the lower working procedure of production, the damage of products in the working procedure is avoided, and the production efficiency and the product protection are improved.

(3) After the whole snake bone component is initially fixed by the central steel wire rope, the perforation assembly work of the endoscope slender objects is facilitated, and the working efficiency is improved:

in the process of assembling a medical or industrial endoscope, the snake bone joint ring parts (the number of the snake bone joint rings is 16 to 46) can be effectively prevented from sliding backwards along the traction steel wire rope, (the prior art finds that a plurality of parts of a snake bone assembly originally assembled on the traction steel wire rope slide backwards and scatter when the first slender part is penetrated in the assembling hole). In the prior art. After each snake bone part is assembled on four traction steel wire ropes, the snake bone connecting rings at the rear part of the snake bone parts tend to slide out and separate along the (four) traction steel wire ropes to the rear part, so that the assembly speed of the internal slender parts is sometimes influenced, for example, when the cable wires, the light guide beams of cameras or the wires of LED illuminating lamps are built-in objects, or when the wires of the LED illuminating lamps are worn-in objects, a plurality of snake bone connecting rings are scattered, and the assembly production of the next procedure is influenced.

Therefore, the structure of the utility model with the central steel wire rope is obviously improved in production efficiency of assembling the snake bone, and the production cost is reduced.

As shown in fig. 1 and 2, for convenience, two ends of the central steel wire rope 6 are fixedly connected with the head end connector 1 and the hose connector 3 respectively, two ends of the central steel wire rope 6 are provided with steel wire rope fixing rings 7 respectively, the outer diameter of each steel wire rope fixing ring 7 is larger than the aperture of the central threading hole 51, the steel wire rope fixing ring 7 at one end of the central steel wire rope 6 is welded on the head end connector 1 and positioned at the outer side of the cross-shaped reinforcing rib 5 of the head end connector 1, and the steel wire rope fixing ring 7 at the other end of the central steel wire rope 6 is welded on the hose connector 3 and positioned at the outer side of the cross-shaped reinforcing rib 5 of the hose connector 3.

As shown in fig. 1, in order to enhance the combination firmness of the mesh protection tube with the head end connector 1 and the hose connector 3 at two ends of the snake bone structure, nylon mesh fixing rings 101 are respectively arranged at the peripheries of two ends of the mesh protection tube 9, so that the connection between the two ends of the mesh protection tube 9 and the head end connector 1 and the hose connector 3 can be enhanced.

As shown in fig. 1, a front end sheath 102 is provided on the outer periphery of the end of the head end fitting 1, which is located at one end of the rubber protection tube 10. The advantages of the front end sheath 102 are: firstly, be used for fixed rubber protection tube, second, the smooth fillet of front end sheath 102 gets into the human body, can not harm advantages such as human inner chamber and inner chamber mucosa.

Thus, the snake bone assembly of the disposable medical endoscope of the utility model has the advantages that:

firstly, the whole snake bone structure in the snake bone assembly is simple in design, and because the cost of each connecting ring material is low, compared with a special stainless steel pipe or a stainless steel rod selected by the existing product, the cost is much lower, the mould production is convenient, the production cost is greatly reduced, and a good economic basis is laid for one-time use;

thirdly, the utility model has smoother design of the traction structure which bends in a plurality of directions, the traction steel wire rope is in the rope threading holes of all parts, the friction coefficient of movement is low, the traction bending angle is easier,

fourth, the cross-shaped reinforcing ribs are additionally arranged in each connecting ring of the snake bone structure, so that the compression strength of the part is improved, the snake bone structure has certain deformation resistance strength when the snake bone is stressed during traction, the central steel wire rope is designed to control the bending angle more accurately or more,

fifth, the utility model is applicable to the examination and diagnosis of digestive system diseases or the general investigation of related diseases due to greatly reduced manufacturing cost, and simultaneously, the utility model replaces the technical proposal that the endoscope in the prior art needs to be reused, i.e. strict and complex disinfection is not needed, cross infection among patients is not worried,

sixth, because the production amount of disposable snake bone products is larger, the disposal amount of the disposable snake bone products used as medical waste materials is also larger, so the disposable snake bone products can be environment-friendly and easily degradable environment-friendly plastics, reduce environmental pollution and effectively protect the environment. For example, polypropylene (PP) environmental protection plastic, hard plastic such as Polycarbonate (PC) and the like environmental protection plastic, which can be processed by injection molding, can be used for producing the snake bone of the disposable endoscope.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a snake bone sub-assembly of disposable medical endoscope, includes that head end connects circle (1), hose connect circle (3), a plurality of bent angle connect circle (2), knits net pillar (9), rubber protection tube (10) and realizes the pull wire rope (4) of snake bone bent angle, head end connects circle (1), hose connect circle (3) and a plurality of bent angle connect circle (2) and link up as an organic whole through pull wire rope (4) and constitute snake bone structure, and a plurality of bent angle connect circle (2) are located between head end connects circle (1) and hose connect circle (3), the periphery of snake bone structure is equipped with knits net pillar (9), and the periphery of knits net pillar (9) is equipped with rubber protection tube (10), its characterized in that:

the head end connecting ring (1), the hose connecting ring (3) and the plurality of corner connecting rings (2) are all hard plastic injection molding pieces or powder metallurgy injection molding pieces,

the end face of one end of the head end joint ring (1) is provided with a rear rotating ball head (11) which is symmetrically arranged along the axial direction of the end face, the head end joint ring (1) is provided with four front rope holes (12) which are uniformly arranged along the circumferential direction of the head end joint ring, the rear rotating ball head (11) is provided with a first rope hole (13) communicated with one of the front rope holes (12),

the two ends of the corner joint ring (2) are respectively provided with a middle ball joint (21) and a middle ball socket (22) which are symmetrically arranged along the axial direction of the corner joint ring, the middle ball joint (21) of one corner joint ring (2) is clamped into the middle ball socket (22) of the other corner joint ring (2) which rotates by 90 degrees for rotation and is matched with the middle ball socket (22), the corner joint ring (2) is provided with four middle rope penetrating holes (23) which are uniformly arranged along the circumferential direction of the corner joint ring, the middle ball joint ring (21) is provided with a second rope penetrating hole (24) which is communicated with one middle rope penetrating hole (23), the middle ball socket (22) is communicated with the rest middle rope penetrating hole (23),

the hose connecting ring (3) is provided with four rear rope holes (32) which are uniformly arranged along the circumferential direction, the front ball socket (31) is communicated with one of the rear rope holes (32),

the rear rotating ball head (11) of the head end joint ring (1) is clamped into the middle ball socket (22) of the bent angle joint ring (2) adjacent to the rear rotating ball head and is in rotary fit, the middle rotating ball head (21) of the bent angle joint ring (2) adjacent to the hose joint ring (3) is clamped into the front ball socket (31) of the hose joint ring (3) and is in rotary fit,

the traction steel wire rope (4) sequentially penetrates through the front rope threading hole (12) of the head end joint ring (1), the middle rope threading hole (23) of the bent angle joint ring (2) and the rear rope threading hole (32) of the hose joint ring (3), one end of the steel wire rope (4) is fixed with the head end joint ring (1) respectively, the other end penetrates out of the hose joint ring (3), and the snake bone structure can be bent in different directions by controlling the traction steel wire rope (4).

2. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: the head end joint ring (1), the bent angle joint ring (2) and the inner cavity of the hose joint ring (3) are respectively provided with a cross-shaped reinforcing rib (5) or a straight-line-shaped reinforcing rib.

3. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: still include center wire rope (6), all be equipped with cross strengthening rib (5) in the inner chamber of head end termination circle (1), bent angle joint circle (2) and hose joint circle (3), head end termination circle (1), bent angle joint circle (2) and hose joint circle (3) each cross strengthening rib (5) have center wire hole (51), center wire rope (6) penetrate in head end termination circle (1), bent angle joint circle (2) and hose joint circle (3) each center wire hole (51) to the both ends of center wire rope (6) respectively with head end termination circle (1) and hose joint circle (3) fixed connection.

4. A snake bone module of a disposable medical endoscope according to claim 3 and wherein: the both ends of center wire rope (6) are equipped with steel rope fixed ring (7) respectively, and the external diameter of steel rope fixed ring (7) is greater than the aperture of center reeving hole (51), steel rope fixed ring (7) of center wire rope (6) one end are established on head end joint circle (1) and are located the outside of cross strengthening rib (5) of head end joint circle (1), steel rope fixed ring (7) of center wire rope (6) other end are established on hose joint circle (3) and are located the outside of cross strengthening rib (5) of hose joint circle (3).

5. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: the inner wall of the head end joint ring (1) is provided with a steel rope fixing sleeve (8), one end of the traction steel wire rope (4) is fixedly connected with the steel rope fixing sleeve (8), and the outer diameter of the steel rope fixing sleeve (8) is larger than the aperture of a front rope penetrating hole (12) of the head end joint ring (1).

6. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: the end face of the end joint ring (1) is provided with a rear connecting bridge (14), the rear connecting bridge (14) is connected with the rear rotating ball head (11) into a whole, a through hole formed in the rear connecting bridge (14) is communicated with the front rope threading hole (12) and the first rope threading hole (13), the end face of one end of the corner joint ring (2) is provided with a connecting bridge (25), the connecting bridge (25) is connected with the middle rotating ball head (21) into a whole, and a through hole formed in the connecting bridge (25) is communicated with the middle rope threading hole (23) and the second rope threading hole (24).

7. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: the middle threading hole (23) communicated with the middle ball socket (22) of the corner joint ring (2) comprises a taper hole and a straight hole which are communicated with each other, the taper hole is close to the center of the middle ball socket (22), the rear threading hole (32) communicated with the front ball socket (31) of the hose joint ring (3) comprises a taper hole and a straight hole which are communicated with each other, and the taper hole is close to the center of the front ball socket (31).

8. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: if the head end joint ring (1), the hose joint ring (3) and the plurality of corner joint rings (2) are hard plastic injection molding pieces, the head end joint ring (1), the hose joint ring (3) and the plurality of corner joint rings (2) are nylon injection molding pieces, or polyoxymethylene injection molding pieces, or polytetrafluoroethylene injection molding pieces; if the head end joint ring (1), the hose joint ring (3) and the plurality of corner joint rings (2) are powder metallurgy injection pieces, the head end joint ring (1), the hose joint ring (3) and the plurality of corner joint rings (2) are stainless steel powder metallurgy injection pieces or aluminum alloy powder metallurgy injection pieces.

9. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: nylon net fixing rings (101) are respectively arranged on the peripheries of the two ends of the net-woven protective tube (9), and connection between the two ends of the net-woven protective tube (9) and the head end connecting ring (1) and the hose connecting ring (3) can be enhanced.

10. A snake bone assembly of a disposable medical endoscope according to claim 1 and wherein: the front end sheath (102) is arranged at the end part of the head end connector (1) and positioned on the periphery of one end of the rubber protection tube (10).