CN114451849A

CN114451849A - Bending section of endoscope insertion section, and endoscope

Info

Publication number: CN114451849A
Application number: CN202111355715.5A
Authority: CN
Inventors: 张剑; 刘孟华; 沈和良
Original assignee: Hangzhou Lainset Medical Technology Co ltd
Current assignee: Hangzhou Lainset Medical Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-10

Abstract

The invention discloses a bending part of an endoscope insertion part, which comprises a strip-shaped body extending along a first direction, wherein a plurality of through holes extending along the first direction and penetrating through the body are arranged in the body, a plurality of V-shaped grooves which are distributed along the first direction and open towards a second direction are arranged on the body, the second direction is vertical to the first direction, a groove with a plane bottom surface is arranged in a region where the V-shaped grooves are arranged on the outer side of the body, so that the outer edge of the side wall of each V-shaped groove forms a straight edge, and the bending part of the endoscope insertion part provided by the invention is not easy to twist when being controlled to bend through the structural arrangement that the outer edge of the side wall of each V-shaped groove forms the straight edge; also disclosed are an endoscope insertion section and an endoscope, which are simple in structure and can be manufactured at low cost.

Description

Bending section of endoscope insertion section, and endoscope

Technical Field

The present invention relates to the field of medical instruments, and particularly to a bending portion of an endoscope insertion portion, and an endoscope.

Background

An endoscope is a common medical instrument, and comprises an operation portion and an insertion portion, the insertion portion is provided at a distal end of the operation portion for entering a human body through a natural orifice of the human body or through an incision formed by surgery. The insertion part comprises a front end part and a bending part from far to near in sequence, and the front end part is provided with an observation mirror. The bending part can realize bending according to the control of the operating part, thereby changing the observation direction of the observation mirror or changing the direction of the surgical instrument extending from the surgical instrument channel or the working channel.

At present, the flexion generally adopts split type snake bone structure, and a plurality of tube couplings connect gradually and can be each other with certain angle rotation, pass each tube coupling through the pull wire to the control flexion is crooked, so that the doctor observes relevant position. Such structures are often too complex and costly to produce.

Thus, a one-piece or one-piece bend is also present.

Chinese patent CN109963491A discloses an apparatus and method for internal imaging, the apparatus comprising a handpiece, a connecting conduit extending from a proximal end of the handpiece, which connecting conduit may comprise a one-piece flexible or deformable support structure as disclosed on page 7 of the specification thereof. The monolithic support structure has a series of offset annular segments of a first set of segments and a second set of segments offset by approximately 90 degrees from the first set of segments, the first and second sets of segments being connected by pairs of flexure bridges that generally allow flexure in at least one direction so that the support structure can be manipulated in two dimensions by pulling and/or pushing appropriate pull wires to effect bending of the connecting conduits.

Chinese patent CN205197941U discloses an endoscope bending part and a disposable endoscope, which comprises a snake bone body; wherein the snake bone body comprises a first side and a second side; the utility model discloses a snake bone body, including snake bone body, first side with the second side is relative, first side with the second side all sets up the first recess of arranging in proper order by a plurality of axial direction of following, snake bone body its inside is equipped with a plurality of first through-holes and the traction hole that the axial runs through snake bone body to and first axial rigidity support piece, first support piece mounting hole, inside first support piece mounting hole axial runs through snake bone body, first axial rigidity support piece sets up in the first support piece mounting hole to prevent that snake bone body from taking place the ascending deformation of axial direction, convenient to use.

However, the existing components for realizing the bending function have complex structure and high production cost; or in actual use, it is often found that there is some deviation from the expected bending orientation.

Disclosure of Invention

The invention provides a bending portion of an endoscope insertion portion, an endoscope insertion portion and an endoscope, which can effectively control the bending direction of the bending portion at low cost.

The inventor finds that in the prior art, the bending part deviates from the expected bending direction in the working state because the cross section of the bending part body is often circular or annular, and in practical use, the bending part is dragged by a traction wire to be bent, and the bending part is actually accompanied by rotation in the circumferential direction, namely twisting or twisting, so that the bending part is influenced to reach the expected bending direction. The split snake bone structure restricts the rotation angles among the pipe joints, so that the twisting phenomenon is less, but the split snake bone structure is complex and the production cost is high; the one-piece serpentine structure often suffers from the above-described inaccuracy in the orientation of the bends.

According to the technical solution of the first aspect of the present invention, to solve the above technical problem:

the embodiment of the invention discloses a bending part of an endoscope insertion part, which comprises a strip-shaped body extending along a first direction, wherein the outer contour of the cross section of the body in the first direction is 6-12 sides, a plurality of through holes extending along the first direction and penetrating through the body are arranged in the body, a plurality of V-shaped grooves which are distributed along the first direction and open towards a second direction are arranged on the body, and the second direction is vertical to the first direction.

By adopting the technical scheme, the outer profile of the cross section of the body in the first direction is 6-12-sided, so that the bending part of the insertion part of the endoscope is not easy to distort when the bending part is controlled to bend; through the arrangement of the V-shaped grooves, compared with other shapes, the beneficial effect that the torsion is not easy to occur is further enhanced.

Optionally, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening towards a third direction, and the third direction is perpendicular to both the second direction and the first direction.

Optionally, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening in a direction opposite to the second direction and/or in a direction opposite to the third direction.

Optionally, a V-shaped groove facing the second direction is disposed opposite to a V-shaped groove facing the opposite direction of the second direction to form a first V-shaped groove group; a V-shaped groove facing the third direction is arranged opposite to a V-shaped groove facing the opposite direction of the third direction to form a second V-shaped groove group.

Optionally, the interval between two V-shaped grooves with opposite opening directions of the first V-shaped groove group and/or the interval between two V-shaped grooves with opposite opening directions of the second V-shaped groove group is 0.3-0.9 mm.

Optionally, the first V-groove group and the second V-groove group are spaced apart along the first direction.

Optionally, the maximum opening angle degree of the V-shaped groove is 3.75 times the diameter millimeter of the circumscribed circle of the cross-section of the body.

Optionally, the through-holes include a working channel through-hole, an auxiliary channel through-hole, and a wire harness channel through-hole.

Optionally, the harness passage through-hole provides a path for the pull wire, the optical fiber and the electrical wire; the working channel through-hole provides a path for the working channel tubing.

Optionally, the auxiliary channel through-hole provides a path for a water or air pipe.

Alternatively, the bending portion of the endoscope insertion portion is integrally injection molded.

Optionally, the bending portion of the endoscope insertion portion is made of one of silicone rubber, TPE, TPU, PVC, and PP.

Alternatively, the opening angle of the V-shaped groove increases in order from the proximal end of the bent portion to the distal end of the bent portion.

Optionally, the minimum opening angle of the V-shaped groove is 10 degrees.

The present invention also provides an endoscope insertion portion including the bending portion of the endoscope insertion portion.

Optionally, the method further comprises: the protective sleeve is sleeved outside the bending part; the working channel pipeline is arranged in the working channel through hole and is made of one of PVC, TPE, PTFE and TPU; and the water pipe or the air pipe is arranged in the through hole of the auxiliary channel, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

The present invention also provides an endoscope including the endoscope insertion portion.

According to the technical solution of the second aspect of the present invention, to solve the above problems:

the embodiment of the invention discloses a bending part of an endoscope insertion part, which comprises a strip-shaped body extending along a first direction, wherein a plurality of through holes extending along the first direction and penetrating through the body are arranged in the body, a plurality of V-shaped grooves which are distributed along the first direction and open towards a second direction are arranged on the body, the second direction is vertical to the first direction, a groove with a plane bottom surface is arranged in an area where the V-shaped grooves are arranged on the outer side of the body, and the outer edge of the side wall of each V-shaped groove forms a straight edge.

By adopting the technical scheme, the bending part of the insertion part of the endoscope is not easy to be twisted when the bending part is controlled to bend through the structural arrangement that the straight edge is formed on the outer edge of the side wall of the V-shaped groove; through the arrangement of the V-shaped grooves, compared with other shapes, the beneficial effect that the torsion is not easy to occur is further enhanced.

Optionally, the groove is provided with a plurality of grooves along the circumferential direction of the body, so that the outer edge of the side wall of the V-shaped groove forms a fold line edge consisting of straight edges.

Optionally, the V-shaped groove and the groove form a V-shaped groove region, and the body is provided with a plurality of V-shaped groove regions arranged along the first direction and opening toward a third direction, which is perpendicular to both the second direction and the first direction.

Optionally, the body is provided with a plurality of V-shaped groove regions arranged along the first direction and opening in a direction opposite to the second direction and/or in a direction opposite to the third direction.

Optionally, a V-groove area facing the second direction is arranged opposite to a V-groove area facing the opposite direction of the second direction to form a first V-groove area group; a V-groove region facing the third direction is disposed opposite to a V-groove region facing the opposite direction of the third direction to form a second V-groove group.

Optionally, the projection of the outer edge of the V-groove of one first V-groove group or one second V-groove group on a reference plane perpendicular to the first direction is in a shape of 6-12 polygons.

Optionally, the first V-groove group and the second V-groove group are arranged at intervals in the first direction.

Optionally, the maximum opening angle degree of the V-shaped groove is 3.75 times of the diameter millimeter of a circumscribed circle of the outer edge cross section of the V-shaped groove group.

Optionally, the outer periphery of the bending part body is provided with a rib extending along the first direction.

Drawings

Fig. 1 is a perspective view showing a structure of a bending portion of an endoscope insertion portion according to an embodiment of the first aspect of the present invention.

Fig. 2 is a front view showing a structure of a bending portion of an endoscope insertion portion according to an embodiment of the first aspect of the present invention.

Figure 3 shows a top view of a flexure arrangement provided by an embodiment of the present invention in a first aspect.

Fig. 4 shows a cross-sectional view along a-a in fig. 2.

Fig. 5 shows a left side view of a flexure structure provided by an embodiment of the present invention in the first aspect.

Fig. 6 is a schematic diagram of the force applied to the side wall edge of a notch or groove when a bending portion of the prior art is bent.

Fig. 7 is a schematic diagram illustrating the force applied to the side wall edge of the V-shaped groove when the bending portion is bent according to an embodiment of the first aspect of the present invention.

Fig. 8 is a front view showing a bending part structure of an endoscope insertion portion according to an embodiment of the second aspect of the present invention.

Fig. 9 shows a top view of the structure shown in fig. 8.

Fig. 10 shows a cross-sectional view along B-B of fig. 9.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships where the products of the present invention are used, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present embodiment, it should be noted that the terms "near" and "far" are relative positional relationships, and when an operator operates an instrument to treat a target object, along the instrument, the side close to the operator is "near" and the side close to the target object is "far".

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

An electronic endoscope (endoscopy) is a medical electronic optical instrument integrating techniques of light collection, machine and electricity, which can be inserted into body cavities and internal organs of human bodies for direct observation, diagnosis and treatment. The electronic imaging element with very small size is used to image the object to be observed inside the cavity via the miniature objective optical system, the received image signal is sent to the image processing system, and the processed image is output in the display for doctor's observation and diagnosis. The electronic endoscopes are classified into electronic gastroscopes, electronic duodenoscopes, electronic colonoscopes, and the like.

An electronic endoscope includes an operation portion and an elongated insertion portion located on a distal end side of the operation portion, and an operator can operate the operation portion to bend a bending portion located at a distal end of the insertion portion in different directions, and an observation optical system located at a distal end surface of the insertion portion obtains an image of a desired observation site, whereby the operator can perform observation, diagnosis, imaging, treatment, and the like. That is, when the endoscope is used as a bending portion of an insertion portion of an endoscope, an observation optical system is provided at a distal end of the bending portion, and a proximal end is connected to another portion of the insertion portion and is controlled by an operation portion to perform bending.

According to a particular embodiment of the first aspect of the invention,

fig. 1 is a perspective view showing a structure of a bending portion of an endoscope insertion portion according to an embodiment of the first aspect of the present invention. As shown in fig. 1, the present invention provides a bending portion 1 of an endoscope insertion portion, comprising a strip-shaped body extending along a first direction X, wherein the outer profile of the cross section of the body in the first direction X is 6-12-sided (as an example, 12-sided as shown in fig. 1 to 5), a plurality of through holes extending along the first direction X and penetrating through the body are arranged in the body, a plurality of V-shaped grooves 111a arranged along the first direction X and opening towards a second direction Y is arranged on the body, and the second direction Y is perpendicular to the first direction X.

The cross section of the bending part of the prior endoscope insertion tube is generally designed to be circular or annular, namely, the bending part of the prior endoscope insertion tube is presented as a cylinder under the relaxed state (not pulled by a traction wire). When the insertion portion enters a position to be observed, such as a body cavity, the bending portion is pulled by the pulling wire to be bent, and at this time, the bending portion is also rotated in the circumferential direction, that is, twisted or twisted, which affects the bending portion to reach a desired bending orientation, and the observation angle is deviated. For this reason, as shown in fig. 6, when the bending portion of the substantially cylindrical body in the prior art is bent, two opposite surfaces of the fan-shaped notch (as referred to as CN 109963491A) or the groove (as referred to as CN 205197941U) are abutted, and the edges of the two surfaces abutted against each other are rounded, which means that the forces applied to the edges of the opposite surfaces are substantially the same; in addition, in order to facilitate the bending of the bending portion and restore the original shape when the bending portion is not pulled by the traction wire, an elastic material is often used for the bending portion. This results in the prior art providing bends that are prone to rotation, i.e., twisting, in the circumferential direction when bent. By adopting the technical scheme of the invention, the outer profile of the cross section of the body in the first direction is 6-12-sided, so that when the bending part of the endoscope insertion part provided by the invention is bent towards the second direction Y, as shown in fig. 7, the oppositely arranged side wall edges of the V-shaped groove are straight edges of a broken line type. However, if the cross-sectional outer profile of the body in the first direction is set to be a polygon with the number of sides less than 6, flexibility of bending of the bending portion is affected and the number and size of the body-receivable through holes are reduced; and the resistance to twisting also decreases as the number of edges increases. Therefore, it is appropriate to set the number of sides of the polygon to 6 to 12 through trial and error.

In addition, the V-shaped groove is provided in a V shape, that is, the bottom of the groove is linear, so that when the opposite side walls of the groove are attached to each other while the bending portion is bent, the area where the side walls are attached to each other is larger. Such an arrangement is not linear with respect to the prior art U-shaped channel or base and the effect of resisting twisting is also helpful.

In addition, since the bending portion is a part of the insertion portion, and the insertion portion needs to be inserted into a human body or a narrow environment, the bending portion often needs to be provided with a protective sheath on the outer side. The outer profile of the bending part body is set to be polygonal, and compared with the circular shape in the prior art, the bending part body is also favorable for penetrating into the protective sleeve along the axial direction. As will be appreciated by those skilled in the art, this is because the contact area between the outside of the bend and the inside of the protective sheath is reduced; the polygonal straight edge and the inner wall of the protective sleeve which is usually circular leave a gap, which is also beneficial to the bending part to penetrate into the protective sleeve along the axial direction. The above effect is particularly remarkable when the protective cover and the bending portion are both made of elastic materials. Most importantly, the technical scheme has simple structure and can be manufactured at low cost.

Fig. 2 is a front view showing a structure of a bending portion of an endoscope insertion portion according to an embodiment of the first aspect of the present invention. Figure 3 shows a top view of a flexure arrangement provided by an embodiment of the present invention in a first aspect. Fig. 4 shows a cross-sectional view along a-a in fig. 2. Fig. 5 shows a left side view of a flexure structure provided by an embodiment of the present invention in the first aspect. As shown in fig. 1 to 5, the body is provided with a plurality of V-shaped grooves 112a arranged along the first direction X and opened toward a third direction Z perpendicular to both the second direction Y and the first direction X. The body is further provided with a plurality of V-shaped grooves 111b arranged along the first direction X and opening in a direction opposite to the second direction Y, and/or V-shaped grooves 112b opening in a direction opposite to the third direction Z.

With continued reference to fig. 1 to 5, a V-shaped groove 111a facing the second direction Y is disposed opposite to a V-shaped groove 111b facing the opposite direction Y' of the second direction Y to form a first V-shaped groove group 111; a V-shaped groove 112a facing the third direction Z is disposed opposite to a V-shaped groove 112b facing the reverse direction Z' of the third direction Z to form a second V-shaped groove group 112. The relative arrangement means that the positions of the V-shaped

grooves

111a and 111b in the first direction X are the same, in other words, the distances between the V-shaped

grooves

111a and 111b and one end or the other end of the bending portion are the same, so that when one of the V-shaped

grooves

111a and 111b is closed during the bending process of the bending portion, the other V-shaped groove is further opened, which is beneficial to ensuring that the bending portion is kept stable during the bending process.

With continued reference to fig. 1, the first V-groove group 111 and the second V-groove group 112 are spaced along the first direction X, which is beneficial to ensure normal bending and structural stability of the bending portion when the bending portion is bent along the second direction Y, the opposite direction Y 'of the second direction, the third direction Z or the opposite direction Z' of the third direction. In another embodiment of the present invention, the interval d between two V-grooves having opposite opening directions of the first V-groove group 111 and/or the second V-groove group 112 is 0.3 to 0.9 mm (as shown in fig. 2 and 3) to ensure the bending times of the bending portion.

The circumscribed circle diameter of the cross section of the bending part 1 body is about 12 mm, referring to fig. 2, in the embodiment of the invention, the maximum opening angle of the V-shaped groove is 45 degrees, and through experimental comparison, based on the structure and material of each part in the embodiment provided by the invention, a larger opening angle is not beneficial to the accurate control of the bending angle, and the anti-twisting performance is also adversely affected; the minimum opening angle of the V-shaped groove is 10 degrees, and the smaller opening angle is difficult to provide the required degree of bending, i.e., the angle at which the bending portion is controlled to bend in the axial direction, based on the cooperation of the structure and material of the components in the embodiment provided by the present invention. Those skilled in the art will appreciate that the opening angle of the V-shaped groove is directly related to the diameter of the circumcircle of the cross section of the bending portion 1, and the matching relationship between the opening angle and the circumcircle directly affects the bending performance and the anti-twisting performance of the bending portion 1. According to experiments, in order to ensure the performance, the opening angle of the V-shaped groove and the diameter of the circumcircle of the cross section of the bending part 1 body are approximately in a linear relation, namely the maximum opening angle value of the V-shaped groove is 3.75 times of the diameter value of the circumcircle of the cross section of the bending part 1 body.

As shown in fig. 2, the opening angles α 1, α 2, α 3 of the V-shaped grooves are 45 degrees at the maximum and 10 degrees at the minimum. Referring to fig. 1 to 4, in one embodiment of the present invention, the opening angle of the V-shaped groove gradually increases from the proximal end 12 to the distal end 13 of the bending portion 1, i.e., α 1 < α 2 < α 3.

However, the maximum opening angle and the minimum opening angle of the V-shaped groove described above need not be satisfied at the same time. In particular the minimum opening angle, can be adjusted as required.

As shown in fig. 5, the through-holes may include a working channel through-hole 14, an auxiliary channel through-hole 15, or a wire harness channel through-hole 16. Harness access through-hole 16 may include through-

holes

16a, 16b, 16c that provide a path for the lead wires, optical fibers, and electrical wires, respectively. The pull wire is used for controlling the bending of the bending part according to the operation of the operation part, specifically, one end of the pull wire is fixed on the operation part, the other end of the pull wire passes through the near end of the bending part and then is fixed at the far end of the bending part, and the head end of the bending part can be driven to be pulled and loosened by pulling and loosening the pull wire through the operation part, so that the bending control of the bending part of the insertion part is realized; the optical fiber can provide illumination for the process that the endoscope is inserted into the human body cavity and observed by transmitting the light of the external light source to a required position; the electric wire may be a camera cable for transmitting electronic data or a cable for transmitting a large current. The working channel through hole 14 provides a path for a working channel pipeline, and the material of the working channel pipeline may be one of PVC (polyvinyl chloride, chinese name), TPE (thermoplastic elastomer, chinese name), PTFE (polytetrafluoroethylene, chinese name) and TPU (thermoplastic polyurethane elastomer, chinese name). The auxiliary passage through hole 15 provides a path for a water pipe or an air pipe, and the material of the water pipe or the air pipe may be one of PVC (polyvinyl chloride, chinese name), TPE (thermoplastic elastomer, chinese name), PTFE (polytetrafluoroethylene, chinese name), and TPU (thermoplastic polyurethane elastomer, chinese name). The material of water pipe or trachea material, working channel pipeline and the material of 1 body of flexion can have the mating reaction each other, can be through the allotment each other of both materials, further control required dynamics of controlling, bend angle and crooked stability. In the embodiment of the present invention, the material of the bending portion 1 may be one of silicon rubber, TPE (chinese name: thermoplastic elastomer), TPU (chinese name: thermoplastic polyurethane elastomer), PVC (chinese name: polyvinyl chloride), and PP (chinese name: polypropylene).

In the prior art, a bending part of a split endoscope insertion part is adopted, a plurality of metal pipe sections are sequentially connected, or the metal pipe sections are formed by carving, so that the assembly process is complex, and the manufacturing cost is high. The bending part of the insertion part of the endoscope provided by the invention is integrally formed by injection molding, so that the assembly of parts is reduced, and the production cost is reduced.

The first aspect of the present invention also provides an endoscope insertion portion including the bending portion of the endoscope insertion portion according to the above embodiment, further including: the protective sleeve is sleeved outside the bending part; the working channel pipeline is arranged in the through hole of the working channel, and the material of the working channel pipeline is one of PVC, TPE, PTFE and TPU; and the water pipe or the air pipe is arranged in the through hole of the auxiliary channel, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

The first aspect of the present invention also provides an endoscope that includes the endoscope insertion portion described above, and that is simple in structure and can be manufactured at low cost.

According to a particular embodiment of the second aspect of the invention,

the embodiment of the invention discloses a bending part 1 of an endoscope insertion part, which comprises a strip-shaped body extending along a first direction X, wherein a plurality of through holes extending along the first direction X and penetrating through the body are arranged in the body, a plurality of V-shaped grooves which are arranged along the first direction X and open towards a second direction Y are arranged on the body, and the second direction Y is perpendicular to the first direction X, wherein as shown in figure 8, a groove with a plane bottom surface 17 is arranged in an area where the V-shaped grooves are arranged on the outer side of the body, so that the outer edge 18 of the side wall of each V-shaped groove forms a straight edge.

In other embodiments, the grooves are provided in plurality along the circumference of the body, such that the outer edges 18 of the side walls of the V-shaped groove form a fold line consisting of straight edges.

As described above with respect to the embodiment of the first aspect of the present invention, in the embodiment of the second aspect of the present invention, it is still possible to realize that, with respect to the prior art, when the bending portion 1 is bent in the second direction Y, since the oppositely disposed side wall edges 18 of the V-shaped groove are straight edges, or further straight edges forming a folding line, it is possible to prevent the bending portion 1 from rotating in the circumferential direction when bent to some extent.

For convenience of description, the V-shaped groove and the concave surface are defined as V-shaped groove regions. A plurality of V-shaped groove zones may be provided on the body, arranged along the first direction X and open towards a third direction Z, which is perpendicular to both the second direction Y and the first direction X. The body may further be provided with a plurality of V-shaped groove zones arranged along the first direction X and opening in a direction opposite to the second direction Y and/or in a direction opposite to the third direction Z.

As shown in fig. 8, a V-groove region facing the second direction Y and a V-groove region facing the opposite direction Y' of the second direction Y are arranged to face each other, forming a first V-groove group. Accordingly, a V-groove region facing the third direction Z may be disposed opposite to a V-groove region facing the reverse direction Z' of the third direction Z to form a second V-groove group.

In another embodiment, the outside edges 18 of the vee-grooves of one first or one second set of vee-grooves may be made 6-12 sided in projection on a reference plane perpendicular to the first direction X. The advantageous effects of such an arrangement are as described in the detailed description of the first aspect of the invention.

In another embodiment, the interval d between two V-shaped grooves with opposite opening directions of the first V-shaped groove group and/or the second V-shaped groove group is 0.3-0.9 mm (as shown in figures 2 and 3) so as to ensure the bending times of the bending part. The first V-shaped groove group and the second V-shaped groove group are arranged at intervals along the first direction X. The maximum opening angle degree of the V-shaped groove is 3.75 times of the diameter millimeter of the circumscribed circle of the outer side edge cross section of the V-shaped groove group.

The through-holes may include a working channel through-hole, an auxiliary channel through-hole, and a wire harness channel through-hole.

In one embodiment, as shown in fig. 8-10, the periphery of the body of the bending part 1 is provided with a rib 19 extending along the first direction X. It may be a bump, or the like disposed along the first direction X, or a groove extending along the first direction X. As previously mentioned, this arrangement facilitates a faster penetration of the bend 1 into the protective casing in the axial direction (i.e. the first direction X).

In the same manner as in the first aspect of the present invention, the bending portion 1 of the endoscope insertion portion may be integrally injection-molded. The bending part 1 of the endoscope insertion part may be made of one of silicon rubber, TPE, TPU, PVC and PP. The opening angle of the V-shaped groove may be set to increase in order from the proximal end 12 of the bent portion 1 to the distal end 13 of the bent portion 1.

The second aspect of the present invention also provides an endoscope insertion portion including the bending portion 1 of the endoscope insertion portion described above. The bending portion 1 may further include: the protective sleeve is sleeved outside the bending part; the working channel pipeline is arranged in the working channel through hole and is made of one of PVC, TPE, PTFE and TPU; and the water pipe or the air pipe is arranged in the through hole of the auxiliary channel, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

A second aspect of the present invention also provides an endoscope including the endoscope insertion section.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a flexion of endoscope insertion portion, includes the strip body that extends along first direction, its characterized in that, this internal edge that is equipped with extend along first direction and run through a plurality of through-holes of body, be equipped with a plurality of edges on the body first direction is arranged and towards second direction open-ended V-arrangement groove, the second direction perpendicular to first direction, wherein, set up on the body outside the region of V-arrangement groove is equipped with the recess that has a plane bottom surface, makes the lateral wall outward flange of V-arrangement groove forms the straight flange.

2. The bending section of an endoscope insertion section according to claim 1, wherein the groove has a plurality of grooves along a circumferential direction of the body, and an outer edge of a side wall of the V-shaped groove is formed into a fold line side composed of straight edges.

3. The bending section of an endoscope insertion section according to claim 1 or 2, wherein the V-shaped groove and the groove form a V-shaped groove region, and the body is provided with a plurality of V-shaped groove regions arranged in the first direction and opened toward a third direction perpendicular to both the second direction and the first direction.

4. The bending part of an insertion portion of an endoscope according to claim 3, wherein the body is provided with a plurality of V-shaped groove sections arranged in the first direction and opened in a direction opposite to the second direction and/or a direction opposite to the third direction.

5. The bending section of an endoscope insertion section according to claim 4, wherein one of the V-groove regions facing the second direction is disposed opposite to one of the V-groove regions facing the opposite direction of the second direction to form a first V-groove region group; one of the V-groove regions facing the third direction is disposed opposite to one of the V-groove regions facing the opposite direction of the third direction to form a second V-groove region group.

6. The bending section of an endoscope insertion section according to claim 5, wherein a projection of an outer side edge of the V-groove of one of the first V-groove group or the second V-groove group on a reference plane perpendicular to the first direction is a 6-12 polygon.

7. The bending section of an endoscope insertion section according to claim 6, wherein a space between two V-shaped grooves opposite in opening direction of the first V-shaped groove group and/or a space between two V-shaped grooves opposite in opening direction of the second V-shaped groove group is 0.3 to 0.9 mm.

8. The bending section of an endoscope insertion section according to claim 7, wherein the first V-groove group and the second V-groove group are provided at intervals in the first direction.

9. The bending section of an endoscope insertion section according to any one of claims 1, 2, and 4 to 8, wherein the maximum opening angle degree of the V-groove is 3.75 times as large as the diameter mm of a circumscribed circle of the outer edge cross section of the V-groove group.

10. The bending section of an endoscope insertion section according to claim 1 or 2, wherein the through-holes include a working channel through-hole, an auxiliary channel through-hole, and a wire harness channel through-hole.

11. The bending portion of an endoscope insertion portion according to claim 1 or 2, wherein the outer periphery of the body is provided with a rib extending in the first direction.

12. The bending portion of an endoscope insertion portion according to claim 1 or 2, wherein the bending portion of the endoscope insertion portion is integrally injection-molded.

13. The bending part of an endoscope insertion part according to claim 1 or 2, wherein a material of the bending part of the endoscope insertion part is one of silicone rubber, TPE, TPU, PVC and PP.

14. The bending section of an endoscope insertion section according to claim 9, wherein an opening angle of the V-shaped groove increases in order from a proximal end of the bending section to a distal end of the bending section.

15. An endoscope insertion portion, characterized by comprising the bending portion of the endoscope insertion portion according to any one of claims 1 to 14.

16. The endoscope insertion portion of claim 15, further comprising:

the protective sleeve is sleeved outside the bending part;

the working channel pipeline is arranged in the working channel through hole, and the material of the working channel pipeline is one of PVC, TPE, PTFE and TPU;

and the water pipe or the air pipe is arranged in the through hole of the auxiliary channel, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

17. An endoscope, characterized by comprising an endoscope insertion portion according to claim 15 or 16.