CN218922518U

CN218922518U - Endoscope snake bone hose, endoscope insertion part and endoscope structure

Info

Publication number: CN218922518U
Application number: CN202222277556.8U
Authority: CN
Inventors: 韩沁驰; 徐根如
Original assignee: Suzhou Keqin Micro Vision Medical Equipment Co ltd
Current assignee: Beijing Future Cloud Technology Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-04-28
Anticipated expiration: 2032-08-29

Abstract

The utility model discloses an endoscope snake bone hose, an endoscope inserting part and an endoscope structure, wherein the tube wall of the endoscope snake bone hose is of a multi-layer structure and sequentially comprises a tube sleeve outer layer, a weaving layer and a tube core inner layer, wherein the tube core inner layer further extends from the weaving layer to the tube core direction to form a widening structure in the tube core direction, a plurality of protruding parts are formed on a body of the tube core inner layer along the hollow inner cavity of the endoscope at equal angular intervals according to a preset angle, a through channel is formed in each protruding part, and a traction wire harness is buried in each channel; and, along the axial direction of endoscope snake bone hose, the weaving layer is including the bending part that is close to the head tip and keep away from the non-bending part of head tip, wherein, the weaving density of bending part is less than the weaving density of non-bending part, and this structure has replaced current snake bone pipe, reduces part number, simplifies endoscope hose structure, solves the easy problem of taking off of current structure junction, is showing reduction product production and assembly cost.

Description

Endoscope snake bone hose, endoscope insertion part and endoscope structure

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an endoscope snake bone hose which integrates a snake bone tube structure and a main hose structure of an existing endoscope and realizes an integral main tube structure.

Background

An endoscope is medical equipment which enters the human body through a natural duct of the human body or through an artificial mouth after operation. When in use, the endoscope is guided into the organ to be examined, and the pathological changes of the organ part are observed through the imaging equipment at the head end of the endoscope.

In the endoscope integrated structure under the existing structure, a snake bone pipe section for connecting the end part of an endoscope lens and a main hose structure is included, the snake bone pipe section is a bendable tubular body formed by connecting a plurality of snake bone units end to end, and a signal wire, a steel wire rope, an instrument pipe and the like required by the working of the head end part of the endoscope extend out through the main hose, penetrate through the whole snake bone pipe section and are finally connected with the head end part.

Fig. 1 is a schematic view showing an insertion end structure of a conventional endoscope. Referring to fig. 1, the insertion end of the endoscope is an elongated straight tubular member, comprising, from left to right, a main hose 10', a snake bone tube 20' and a head end 30', according to the orientation presented in fig. 1. Usually, the three parts are fixedly connected through a mode of an adapter, special glue or hot melting and the like.

Inside the main hose 10', there are disposed a traction wire 41' wrapped with a sheathing tube 40', a head-end photographing device, a cable 50' required for a lighting assembly, and an instrument channel tube through which instruments are passed. Fig. 2 is a schematic view schematically showing a sectional structure of a snake bone tube. As shown, the various fill portions within the main hose 10 'are configured to be routed through the inner aperture of the snake bone tube 20'. As can be seen from the cross-sectional structure of the snake bone tube 20', a snake bone clamping groove structure 241' for passing the traction steel wire therethrough, a cable and a channel 21' for passing the instrument channel tube are respectively formed in the tube. Finally, the snake bone tube 20 'assembly is connected to the head end 30' with the cables and instrument channel tubes inside it interfacing correspondingly to the camera module, light source, and connector assembly.

It can be seen that the number of parts involved is large, whether it is three main parts constituting the structure of the speculum or the butt joint transmission between the parts, and the speculum is a precision device, which has high precision requirements for the parts and components, resulting in high difficulty in assembling the device and high cost. On the other hand, the existing snake bone tube is composed of a plurality of snake bone units, and in order to meet the basic function of bending, the connection at the butt joint positions of the plurality of snake bone units is required to be stable and difficult to break and deviate from. However, in long-term experiments and practices, it has been found that the snake bone tube structure formed by the multiple sections of snake bone units often generates a dislocation due to excessive bending or repeated changing of the bending direction.

In view of the above, the tube structure of the insertion end of the endoscope of the prior art should be improved to solve the above-mentioned technical problems.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the endoscope snake bone hose which integrates the endoscope snake bone hose and the main hose into a whole structure.

In order to solve the technical problems, a first aspect of the present utility model provides an endoscope snake bone hose, which is a hollow tubular member comprising at least two butt ends, at least one end of the hollow tubular member is connected to a handle portion of the endoscope, at least the other end of the hollow tubular member is connected to a head end portion of the endoscope, a tube wall of the endoscope snake bone hose is of a multi-layer structure, and sequentially comprises a tube sleeve outer layer, a braiding layer and a tube core inner layer according to a direction from outside of the tube to a tube core, wherein the tube core inner layer is a widening structure formed by further extending from the braiding layer to the tube core direction, a body of the tube core inner layer is further extended, a plurality of protruding parts are formed along a hollow inner cavity of the endoscope at equal angular intervals according to a preset angle, a channel penetrating from one end to the other end of the endoscope snake bone hose is formed in the protruding parts, and a traction wire harness is embedded in the channel; and, along an axial direction of the endoscope snake bone hose, the braid includes a bent portion near the head end and a non-bent portion distant from the head end, wherein a braid density of the bent portion is less than a braid density of the non-bent portion.

Preferably, the channel in the protruding portion of the inner layer of the die is defined as a sheath pipe, each sheath pipe is embedded with a seamless steel pipe, the seamless steel pipe is a local elastic piece with a spiral cut end, a traction wire harness is embedded in the seamless steel pipe, the cutting interval h of the seamless steel pipe is in the range of 1 mm to 8 mm, and the cutting length of the end of the seamless steel pipe is consistent with the length of the bending portion of the braiding layer.

Further preferably, the inner layer of the die is made of polytetrafluoroethylene material.

Still further preferably, the seamless steel pipe has an overall radius of curvature of the hardness of 4 mm to 80 mm.

In this scheme, the outer layer of the pipe sleeve is made of a high polymer material, and the high polymer material is at least one of thermoplastic polyurethane elastomer rubber and polyether block polyamide.

Still further preferably, the hollow cavity of the endoscope snake bone hose is a passage through which the cable and the instrument passage tube pass.

In a second aspect of the present utility model, there is provided an endoscope insertion portion, including an endoscope snake bone hose as described above, wherein a head end seat is sleeved at one end of the endoscope snake bone hose, and the head end seat is in plug-in fit with the endoscope snake bone hose, and wherein a cable and an instrument channel tube are inserted into the endoscope snake bone hose and are in butt joint with the head end seat.

Preferably, in this scheme, the head end seat is connected with the endoscope snake bone hose through a front end sleeve, and two ends of the front end sleeve are respectively sleeved with the endoscope snake bone hose and the head end seat.

A third aspect of the present utility model is to provide an endoscope structure including the endoscope insertion portion according to the second aspect of the present utility model, the endoscope insertion portion being inserted into an endoscope handle portion.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial technical effects:

1. the existing structure includes a main hose as a non-bending structure, which is butted with a snake bone tube as a bending structure, and the other end of the snake bone tube is reconnected to the head end to form an insertion portion structure of the endoscope. The fixedly connecting effect of each section in the three-section structure is unstable, the problems of local fracture of a pipe fitting, falling-off of a snake bone unit and the like easily occur, and according to the first aspect of the scheme, the snake bone pipe and the main hose are integrated to form an integral long straight pipe-shaped structure, the structures of the endoscope snake bone hose and the endoscope insertion part are greatly simplified, and the number of parts is reduced;

2. in order to adapt to the wiring of the traction wire harness in an endoscope pipeline, an inner cavity extending protruding structure is formed inside the integrated endoscope snake bone hose, a channel penetrating through two ends of the endoscope snake bone hose is formed inside the protruding structure, the traction wire harness penetrates through the whole endoscope snake bone hose through the channel, a mode of assembling the traction wire harness with a clamping groove in a snake bone unit in the prior art is replaced, and the assembly complexity of the wire harness is remarkably simplified; on the other hand, the cable and the instrument channel tube penetrate through the cavity in the hose from the handle part of the front stage of the hose and are directly connected with the head end of the endoscope insertion part; the structure is simplified, and meanwhile, the assembly cost of the product is further reduced;

3. based on the improved thought of integrating the snake-bone tube and the main hose, the bending problem of the integrated integral tube structure needs to be solved, and the strength problem of the pipe fitting needs to be solved, in the scheme, in order to meet the bending requirement, a wire harness is drawn into a seamless steel tube, the end part of the seamless steel tube is spirally cut by laser to form a local elastic wire harness, the surface of the seamless steel tube forms an equidistant section, in order to improve the flexibility of the main hose, the main hose is arranged to be a part close to the end part of the head and is used as a non-bending part, the bending part and the non-bending part are both steel wire braiding layers, and the braiding density of the bending part is smaller than that of the non-bending part, so that the integral structure of the snake-bone hose forms two sections of steel wire braiding layers with different braiding densities, thereby guaranteeing the toughness of the hose at the non-bending part and improving the flexibility of the hose at the bending part;

4. when the embedded seamless steel pipe is spirally cut, the cutting length is kept consistent with the length of the bending part of the weaving layer.

Drawings

FIG. 1 is a schematic view showing an insertion end structure of a conventional endoscope;

fig. 2 is a schematic view schematically showing a sectional structure of a snake bone tube;

fig. 3 is a partial schematic view schematically showing the structure of a condyle of a snake bone unit of the prior art at a first viewing angle.

FIG. 4 is a partial schematic view schematically showing the structure of a condyle in a second view of a snake bone unit of the prior art structure;

FIG. 5 is a cross-sectional view showing a cross-sectional structure of an endoscopic snake bone hose according to a preferred embodiment of the utility model

Fig. 6 is a sectional view schematically showing a sectional structure of a snake bone hose according to the preferred embodiment of the utility model;

FIG. 7 is a schematic view showing a structure of an endoscope insertion section provided in another aspect of the present utility model;

FIG. 8 is a schematic view showing the structure of the head end in FIG. 7;

fig. 9 is an exploded view showing an exploded structure of another endoscope insertion section provided by the present utility model.

Detailed Description

An embodiment of an endoscopic snake bone hose according to the utility model will be described below with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope. Furthermore, in the present specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

It should be noted that, in the embodiments of the present utility model, the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the expressions "first" and "second" are merely used for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The preferred embodiment of the utility model is provided for solving the technical problems that in the prior art, the snake bone tube for an endoscope has poor stabilizing effect at the joint of the tube fitting, the part is easy to break, and the snake tube unit is easy to fall off after long-term use.

Referring to fig. 3 and 4, fig. 3 and 4 are partial schematic views schematically showing the structure of the condyle at different angles of view of the snake bone unit of the prior art structure. Referring first to fig. 3, fig. 3 shows a bone joint structure at a first view angle, the surface of the snake bone unit 24 'is recessed to form a clamping groove structure 241', and the traction wire 41 'and the snake bone tube are threaded, essentially the traction wire 41' sequentially passes through the clamping groove structure 241 'in each snake bone unit 24', and it can be seen that the clamping traction manner makes the assembling process of the snake bone tube complex and the assembling cost is high. Referring to fig. 4 again, fig. 4 shows a bone structure at the second view angle, each snake bone unit 24 'forms a plug 242' and a plug groove 243 'in the axial direction, and the snake bone units 24' are connected in a tail-end manner to form a whole snake bone pipe by the plug 242 'of the later snake bone unit 24' and the plug groove 243 'of the former snake bone unit 24'. The stability of the connection between the plug 242 'and the slot 243' determines the stability of the structure of the snake bone tube. In actual working conditions, when any one of the connectors 242 'is pulled out of the connector slot 243' as the bending member in the process of bending frequently for a long time, the whole snake bone tube is disabled.

In order to solve the above technical problems, the preferred embodiment of the present utility model provides the following ideas:

1. changing the multi-section structure of the endoscope insertion part, integrating the original separated snake bone tube with the main hose to form an integrated structure;

2. based on the first improvement thought, the bending and hardness problems of the pipe fitting after the integration of the snake bone pipe and the main hose are further solved.

Referring to fig. 5, fig. 5 is a sectional view showing a sectional structure of an endoscopic snake bone hose according to a preferred embodiment of the utility model. As shown in the figure, in order to achieve the first improvement, in the preferred embodiment of the present utility model, an endoscope snake bone hose 100 for connecting a handle portion and a head end portion of an endoscope is provided, and the endoscope snake bone hose 100 is a multi-layer tube from outside to inside, namely a tube sleeve outer layer 101, a braiding layer 102 and a tube core inner layer 103, in a cross-sectional view.

The outermost layer of the endoscope snake bone hose 100 is a pipe sleeve outer layer 101 prepared from at least one of high polymer materials such as thermoplastic polyurethane elastomer rubber, polyether block polyamide and the like, the middle layer of the hose is a steel wire braiding layer 102 formed by steel wire braiding, and the inner layer of the hose is a pipe core inner layer 103 prepared from polytetrafluoroethylene materials.

The inner tube core layer 103 is a tube wall widening structure formed by extending the woven layer 102 towards the tube core direction, the body of the inner tube core layer 103 further extends according to a certain preset angle to form a plurality of protruding parts 104 which are distributed in the inner cavity of the hose at equal angles, a channel 105 which penetrates from one end to the other end of the endoscope snake bone hose 100 is formed in the protruding parts 104, and the channel 105 is used for penetrating a traction wire harness, such as a steel wire harness. In the preferred embodiment, four protrusion structures are formed according to the angular distance of 90 °, while in other preferred embodiments of the present utility model, the number of protrusions and the aperture of the channel may be adjusted according to the required assembly and hose stress, for example, the channel aperture may be reduced to increase the number of protrusions, six protrusions distributed according to the angular distance of 60 ° may be formed, or eight protrusions distributed according to the angular distance of 45 ° may be formed, or the channel aperture may be increased to decrease the number of protrusions, and two protrusions symmetrically distributed according to the angular distance of 180 ° may be formed.

The traction wire harness may be arranged in such a way that the bound or wound wire harness passes directly through the channel in the protrusion 104, but in view of the impediment of other components to the sliding of the wire during assembly, and the frictional damage of the wire harness in actual use, it is preferable to place the traction wire harness in the wire sheathing tube. In the preferred embodiment, a prefabricated seamless steel pipe is embedded in the protruding portion 104 as a wire sheathing pipe for protecting the wire bundle. The seamless steel pipe is an elastic piece formed by spiral cutting by laser. In the sectioning of the seamless steel pipe, a spiral winding gap is formed after spiral sectioning, and the number of sections of the sheath pipe is determined according to the curved path and the curved angle of the endoscope snake bone hose, and parameters such as the length of each section, the interval between two sections and the like. In the preferred embodiment of the present utility model, the slit distance h of the seamless steel pipe is in the range of 0.05 mm to 5 mm, and the overall radius of curvature thereof is in the range of 4 mm to 80 mm.

Referring back to fig. 1, in the conventional structure of the endoscope insertion portion, the main hose is a portion as a non-bending structure, and the snake bone tube is a portion as a bending structure. Then in the present utility model the integrated main hose structure needs to take into account the bending problem. In the preferred embodiment, further processing of the braid 102 and seamless steel tube is required.

The braid 102 is divided into two sections in the axial direction of the snake bone hose. Referring to fig. 6, fig. 6 is a sectional view schematically showing a sectional structure of a snake bone hose according to the preferred embodiment of the utility model. As shown in the drawing, the braid 102 includes two parts with unequal braid density in the axial direction, and if one end of the hose shown in fig. 6 is an end portion abutting against the head end portion of the endoscope, the braid in the axial direction includes a bent portion 1021 near the head end portion and a non-bent portion 1022 far from the head end portion, wherein the braid density of the bent portion 1021 is much smaller than that of the non-bent portion 1022, which is obviously to accommodate the arrangement of bending the head end of the hose. Accordingly, the seamless steel pipe 106 embedded in the protrusion 104 needs to be disposed correspondingly. In the preferred embodiment of the present utility model, the seamless steel pipe 106 is cut in a spiral manner so that the cut length of the seamless steel pipe 106 coincides with the bent portion 1021 of the braid 102, and thus, as shown in fig. 6, the seamless steel pipe 106 corresponding to the length of the bent portion 1021 of the braid 102 is cut to have partial elasticity, while the seamless steel pipe corresponding to the non-bent portion 1022 of the seamless steel pipe is not cut, thereby maintaining hardness.

It should be noted that, in practice, since the endoscope snake bone hose itself is also a precision device, it is difficult to ensure that the length of the bent portion 1021 of the braid 102 is exactly equal to the cut length of the seamless steel pipe 106, and in this consideration, the design that the braid density of the non-bent portion 1022 of the braid 102 is much greater than that of the bent portion 1021 is also intended to cope with, and when the cut length of the seamless steel pipe is greater than that of the bent portion 1021 of the braid 102, the lengthy portion thereof is not excessively bent.

On the other hand, in other preferred embodiments, the channel for threading the traction wire harness may be formed in the wire braid 102, that is, the channel may be formed in the inner die layer 103, or may be formed in the wire braid 102, or even processed, and in some embodiments, the channel may be partially located in the inner die layer 103 and partially located in the wire braid 102, thereby providing the possibility of further downsizing the endoscope snake hose in different situations and requirements.

In another aspect of the present utility model, there is provided an endoscope insertion section and an endoscope based on the above-described endoscope snake bone hose, wherein the endoscope insertion section is formed by fitting one end of the hose with the head end seat in addition to the above-described endoscope snake bone hose. Fig. 7 is a schematic view showing a structure of an endoscope insertion portion provided in another aspect of the present utility model. Referring to fig. 7, the head end 30 is mated with an endoscopic snake bone hose 100, and referring to fig. 8, fig. 8 shows the structure of the head end 30 of fig. 7. The bottom of the head end 30 forms a plug-in part 31, and after the plug-in part 31 is inserted into the cavity of the end of the endoscope snake bone hose 100, the plug-in part can be bonded by medical glue.

Then, based on the plugging structure of fig. 7, the cable and the instrument channel are first connected to the head end 30 and then plugged integrally, that is, the positions of the cable and the instrument channel are not visible after assembly. In order to improve the assembly and fixedly connecting effects, the utility model also provides a transparent visual equipment scheme. Fig. 9 is an exploded view showing an exploded structure of another endoscope insertion section provided by the present utility model. As shown, the head end 30 is connected to the endoscope snake bone hose 100 by a transparent tip sleeve 32.

The endoscope insertion section shown in fig. 7 or 9 is abutted against the endoscope handle section, that is, an endoscope structure based on an endoscope snake bone hose.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An endoscope snake bone hose is characterized in that the endoscope snake bone hose is a hollow tubular piece comprising at least two butt joint ends, at least one end of the hollow tubular piece is connected to a handle part of an endoscope, at least the other end of the hollow tubular piece is connected to a head end part of the endoscope, the pipe wall of the endoscope snake bone hose is of a multi-layer structure and sequentially comprises a pipe sleeve outer layer, a weaving layer and a pipe core inner layer according to the direction from the outside of the pipe to the pipe core,

the inner layer of the tube core is a widened structure which is formed by further extending the woven layer to the tube core direction, the body of the inner layer of the tube core is further extended, a plurality of protruding parts are formed along the hollow inner cavity of the endoscope at equal angular intervals according to a preset angle, a channel which penetrates from one end to the other end of the snake bone hose of the endoscope is formed in the protruding parts, and a traction wire harness is buried in the channel; the method comprises the steps of,

the braided layer comprises a bending part close to the head end part and a non-bending part far away from the head end part along the axial direction of the endoscope snake bone hose, wherein the braiding density of the bending part is smaller than that of the non-bending part.

2. The endoscope snake bone hose according to claim 1, wherein the channels in the protruding portions of the inner layer of the tube core are defined as sheath pipes, each of the sheath pipes is embedded with a seamless steel pipe which is a local elastic member whose end is cut in a spiral shape, wherein,

the traction wire harness is buried in the seamless steel pipe, the cutting interval h of the seamless steel pipe is in the range of 1-8 mm, and the cutting length of the end part of the seamless steel pipe is consistent with the length of the bending part of the weaving layer.

3. The endoscope snake bone hose according to claim 2, wherein the inner layer of the tube core is made of polytetrafluoroethylene material.

4. An endoscopic snake bone hose according to claim 3 wherein the overall radius of curvature of the hardness of the seamless steel tube is in the range of 4 mm to 80 mm.

5. The endoscopic snake bone hose according to claim 4, wherein the hollow lumen of the endoscopic snake bone hose is a channel through which the cable and instrument channel tube pass.

6. An endoscope insertion part comprising the endoscope snake bone hose according to any of claims 1 to 5, wherein a head end seat is sleeved on one end of the endoscope snake bone hose, the head end seat and the endoscope snake bone hose form an insertion fit, wherein,

the cable and the instrument channel tube are arranged in the endoscope snake bone hose in a penetrating way and are in butt joint with the head end seat.

7. An endoscope insertion section according to claim 6 and wherein said head end socket is connected to said endoscope snake bone hose by a tip sleeve, and wherein the two ends of the tip sleeve are respectively sleeved with said endoscope snake bone hose and said head end socket.

8. An endoscope structure comprising the endoscope insertion section according to claim 6, the endoscope insertion section being inserted into an endoscope handle section.