CN222533252U - Endoscope hose and endoscope - Google Patents
Endoscope hose and endoscope Download PDFInfo
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- CN222533252U CN222533252U CN202421002821.4U CN202421002821U CN222533252U CN 222533252 U CN222533252 U CN 222533252U CN 202421002821 U CN202421002821 U CN 202421002821U CN 222533252 U CN222533252 U CN 222533252U
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Abstract
本实用新型提供一种能够防止前端侧软管的压曲及粗径化的内窥镜用软管及内窥镜。一种内窥镜用软管，其具备：前端侧软管(50)；线圈(58)，缠绕在前端侧软管(50)的外表面即第1软管外表面(50a)的至少一部分上；基端侧软管(60)；及连接管(70)，连接前端侧软管(50)和基端侧软管(60)，前端侧软管(50)具有位于比线圈(58)的基端更靠前端侧软管(50)的基端侧的位置的软管基端部(第1软管基端部(54))，软管基端部具有与连接管(70)连接并且与连接管(70)接触的连接区域(W1A)及位于比连接管(70)更靠前端侧软管(50)的前端侧的位置的非连接区域(W1B)。
The utility model provides an endoscope hose and an endoscope capable of preventing the front end hose from buckling and becoming thicker. The endoscope hose comprises: a front end hose (50); a coil (58) wound around at least a portion of the outer surface of the front end hose (50), namely, a first hose outer surface (50a); a base end hose (60); and a connecting tube (70) connecting the front end hose (50) and the base end hose (60), wherein the front end hose (50) has a hose base end (first hose base end (54)) located closer to the base end of the front end hose (50) than the base end of the coil (58), and the hose base end has a connection area (W1A) connected to and in contact with the connecting tube (70) and a non-connection area (W1B) located closer to the front end of the front end hose (50) than the connecting tube (70).
Description
Technical Field
The present utility model relates to an endoscope tube inserted into an insertion portion of an endoscope, and an endoscope provided with the same.
Background
Various endoscopes such as bronchoscopes and ultrasonic endoscopes are used in the medical field. The endoscope includes an insertion portion and an operation portion that are inserted into a subject. In such an endoscope, various treatment instruments are introduced from a treatment instrument inlet provided in an operation portion, and the treatment instruments are led out to the outside from a treatment instrument outlet opening at a distal end portion of an insertion portion for treatment. In addition, a flexible tube for an endoscope, such as a treatment instrument insertion tube (also referred to as a channel) through which a treatment instrument is inserted, is inserted and disposed inside the insertion portion of the endoscope.
Patent documents 1 to 4 describe that, in order to prevent buckling of the endoscope tube when the insertion portion is bent, a spiral groove is formed in a part of the outer surface of the endoscope tube, and a coil is wound around the spiral groove.
Patent document 4 describes a method of manufacturing an endoscope tube by forming an endoscope tube from two tubes, a distal tube and a proximal tube, and connecting the distal tube and the proximal tube with a connecting tube, in order to manufacture the endoscope tube easily and accurately.
The proximal end portion of the distal end side hose described in patent document 4 has a connection region externally fitted to the distal end side of the connection tube, and a coil winding region around which a coil is wound. The connection region is an untwisted region provided on the proximal end side of the proximal end portion of the distal end side hose and around which the coil is not wound. The coil winding region is provided continuously with the front end side of the connection region. Thereby, the coil is wound on the outer surface of the base end portion of the distal end side hose to the nearest position of the connection region to which the connection pipe is externally fitted.
Patent document 1 Japanese patent application laid-open No. 2017-000330
Patent document 2 Japanese patent application laid-open No. 2009-247413
Patent document 3 Japanese patent laid-open No. 2008-229067
Patent document 4 International publication No. 2013/088791
In the endoscope tube described in patent document 4, when the coil is wound around the outer surface of the proximal end portion of the distal end side tube, the coil is wound to the nearest position of the connection region. Therefore, when the bending portion of the insertion portion is bent in accordance with the bending operation of the operation portion, stress may concentrate at the nearest position of the connection region (boundary between the connection region and the coil winding region) in accordance with the position of the connection region in the insertion portion, and buckling may occur. Further, the coil may be multiplied by the connection region, and the outer diameter of the connection region may be increased.
Disclosure of utility model
The present utility model has been made in view of such circumstances, and an object thereof is to provide a flexible tube for an endoscope and an endoscope capable of preventing buckling and thickening of a distal end side flexible tube.
The flexible tube for an endoscope according to claim 1 of the present utility model is an insertion portion for inserting an endoscope, and comprises a distal end side flexible tube, a coil wound around at least a part of the outer surface of the distal end side flexible tube, that is, the outer surface of the 1 st flexible tube, a proximal end side flexible tube, and a connection tube connecting the distal end side flexible tube and the proximal end side flexible tube, wherein the distal end side flexible tube has a flexible tube proximal end portion located closer to the proximal end side of the distal end side flexible tube than the proximal end of the coil, and the flexible tube proximal end portion has a connection region connected to the connection tube and contacting the connection tube and a non-connection region located closer to the distal end side of the distal end side flexible tube than the connection tube.
According to the endoscope tube, buckling and thickening of the distal end side tube are prevented.
In the flexible tube for an endoscope according to claim 2 of the present utility model, in claim 1, a spiral groove is formed in at least a part of the outer surface of the flexible tube 1, the coil is wound around at least a part of the groove on the distal end side of the flexible tube base end, and a groove is formed in the outer surface of the flexible tube 1 on the flexible tube base end.
In the endoscope hose according to claim 3 of the present utility model, in claim 1 or claim 2, a flange protruding radially outward of the connection tube is provided on an outer surface of the connection tube, that is, on an outer surface of the tube, and a proximal end of a proximal end portion of the hose and a distal end of the proximal end portion of the hose are abutted against the flange. Thus, when the hose base end portion and the base end side hose are connected to the connection pipe, the position of the base end of the hose base end portion and the position of the tip end of the base end side hose can be positioned.
In the flexible tube for an endoscope according to claim 4 of the present utility model, in any one of claims 1 to 3, at least one of the distal end side expansion surface and the proximal end side expansion surface is provided, the distal end side expansion surface is formed on an inner surface of a distal end portion of the connection tube, that is, a tube distal end portion, and the inner diameter of the tube distal end portion is expanded toward the distal end side of the tube distal end portion, and the proximal end side expansion surface is formed on an inner surface of a proximal end portion of the connection tube, that is, a tube proximal end portion, and the inner diameter of the tube proximal end portion is expanded toward the proximal end side of the tube proximal end portion. Thereby, the step difference between the inner surface of the distal end side hose and the inner surface of the connection pipe, or the step difference between the inner surface of the proximal end side hose and the inner surface of the connection pipe can be reduced.
In the endoscope tube according to claim 5 of the present utility model, in any one of claims 1 to 4, the outer surface of the base end side tube, that is, the outer surface of the 2 nd tube is a smooth surface.
In the flexible tube for an endoscope according to claim 6 of the present utility model, in any one of claims 1 to 5, the length of the non-connection region is 40mm to 60mm.
In the endoscope hose according to claim 7 of the present utility model, in any one of claims 1 to 6, the proximal end side hose has a hose distal end portion connected to the connection pipe, and the outer diameter of the coil is smaller than the outer diameter of at least one of the hose proximal end portion and the hose distal end portion. Thereby, the diameter of the front end side hose around which the coil is wound is prevented from becoming large.
An endoscope according to claim 8 of the present utility model includes an insertion portion having a bending portion and a soft portion connected to the bending portion, and the flexible tube for an endoscope according to any one of claims 1 to 7 is inserted into the insertion portion.
In the endoscope according to claim 9 of the present utility model, in claim 8, the distal end side tube is disposed in the bending portion, and the proximal end side tube and the connection tube are disposed in the flexible portion.
In the endoscope according to claim 10 of the present utility model, in claim 8 or 9, the connection tube is disposed at a position between 200mm and 400mm from the distal end of the insertion portion.
Effects of the utility model
The utility model can prevent buckling and diameter enlargement of a front end side hose.
Drawings
Fig. 1 is an overall view of an endoscope.
Fig. 2 is a perspective view of the front end body.
Fig. 3 is a side view of the treatment instrument inserted through the hose.
Fig. 4 is an enlarged view of a portion shown by an ellipse C of the treatment instrument insertion hose in fig. 3.
Fig. 5 is an exploded view of the treatment instrument inserted through the hose.
Fig. 6 is an enlarged view of the connection pipe.
Fig. 7 is an enlarged sectional view of the connection pipe.
Fig. 8 is an enlarged view of the 1 st hose base end portion.
Symbol description:
1-endoscope, 10-operation part, 12-insertion part, 14-universal cord, 16-bent angle rod, 22-suction button, 23-treatment instrument insertion hose, 24-treatment instrument introduction port, 25-treatment instrument introduction port, 30-soft part, 31-passive bending part, 32-bending part, 34-front end body, 34 a-front end face, 40-observation window, 42-illumination window, 44-treatment instrument introduction port, 50-front end side hose, 50 a-1 st hose outer surface, 52-1 st hose front end, 54-1 st hose base end, 56-spiral groove, 58-coil, 60-base end side hose, 60 a-2 nd hose outer surface, 62-2 nd hose front end, 70-connection tube, 70 a-tube outer surface, 72-tube front end, 74-tube base end, 76-flange, 78-tube inner surface, 78 a-front end side expansion face, 78B-base end side expansion face, C-ellipse, W1-non-winding area, W1-connection area W1-B-bending area W2-connection area, W2-winding area.
Detailed Description
[ Integrated Structure of endoscope ]
Fig. 1 is an overall view of an endoscope 1. As shown in fig. 1, an endoscope 1 is, for example, a bronchoscope, and is used for observing an observation site (may be a lesion, an examination site, or an examination site) of a trachea, a bronchus, and a lung, collecting a cell tissue, and the like. Regarding the bronchoscope, it is required to have a smaller diameter than the digester endoscope in view of the site of use, and even if the bronchoscope has a treatment tool insertion hose 23 (see fig. 3), the bronchoscope may be used in which the outer diameter of the distal end portion main body 34 is 4mm to 6mm and the outer diameter of the soft portion 30 is 4mm to 7 mm.
The endoscope 1 includes an operation unit 10 for a doctor to grasp and perform various operations, an insertion unit 12 for insertion into a patient, and a universal cord 14. The endoscope 1 is connected to a system configuration device such as a processor device and a light source device, not shown, which configure an endoscope system, via a universal cord 14.
The operation unit 10 is provided with various operation members operated by a doctor, for example, a corner lever 16, a suction knob 22, and the like.
The operation unit 10 is provided with a treatment instrument introduction unit 25. The treatment instrument introduction portion 25 is provided with a treatment instrument introduction 24 for inserting a treatment instrument (not shown, the same applies hereinafter) into a treatment instrument insertion hose 23 (see fig. 3) in the insertion portion 12.
The insertion portion 12 extends from the front end of the operation portion 10, is formed in a thin diameter and is elongated as a whole. The insertion portion 12 is composed of a soft portion 30, a passive bent portion 31, a bent portion 32, and a distal end portion main body 34 in this order from the base end side toward the distal end side.
The soft portion 30 is constituted by, for example, a metal spiral tube (a metal plate wound in a spiral shape) and a mesh, which are not shown, and the outer periphery of the soft portion is covered with a resin, which occupies a large part of the insertion portion 12 from the base end side. The soft portion 30 has flexibility capable of being bent in any direction, and is bent along an insertion path into a body cavity when the insertion portion 12 is inserted into the body cavity.
The passive bending portion 31 is formed of, for example, a metal spiral pipe (a metal plate wound in a spiral shape) and a net, which are not shown, and is covered with a bent rubber, which is not shown, together with a bending portion 32, which will be described later. The passive bending portion 31 is configured to be softer than the soft portion 30 so as to be capable of being passively bent by an external force, and is bent along an insertion path into a body cavity in the same manner as the soft portion 30 when the insertion portion 12 is inserted into the body cavity.
The bending portion 32 is configured by, for example, connecting a plurality of bending pieces, not shown, and is an active bending portion that can actively bend in the up-down direction (A2 direction) by rotating the corner lever 16 of the operation portion 10 in the A1 direction. By bending the bending portion 32, the distal end portion main body 34 can be oriented in a desired direction. Instead of the corner lever 16, a pair of corner buttons may be provided, and the bending portion 32 may be bent in the up-down direction and the left-right direction by rotating the pair of corner buttons.
Fig. 2 is a perspective view of the tip end body 34. As shown in fig. 2, an observation window 40, a pair of illumination windows 42, and a treatment instrument guide 44 are provided on the distal end surface 34a of the distal end portion main body 34. An observation optical system including a lens and an imaging unit including an imaging element and the like are provided in the front end body 34, rearward of the observation window 40, although not shown. The imaging unit captures an observation portion through an observation optical system and outputs a signal of an observation image.
Inside the front end body 34, light emitting ends of light guides, not shown, are disposed behind the pair of illumination windows 42, respectively.
The treatment instrument guide 44 guides the treatment instrument inserted into the treatment instrument insertion hose 23 (see fig. 3) from the treatment instrument guide 24.
Returning to fig. 1, although not shown, the universal cord 14 includes a signal cable connected to the imaging element of the observation optical system, the light guide, and the like. A connector is provided at an end of the universal cord 14, not shown. The connector is connected to a predetermined system configuration device such as a processor device and a light source device that configure an endoscope system. Thus, power, control signals, illumination light, and the like necessary for operation of the endoscope 1 are supplied from the system configuration apparatus to the endoscope 1. Then, a signal of the observation image acquired by the observation optical system is transmitted from the endoscope 1 to a system configuration device (processor device). The signal transmitted to the system configuration device is subjected to image processing, and an observation image of the observation site is displayed on a monitor not shown. Illumination light is supplied from a system configuration device (light source device) to the light guide, and the illumination light is irradiated from the pair of illumination windows 42 to the observation site.
The configuration of the operation unit 10 and the distal end portion main body 34 is not particularly limited to the configuration shown in fig. 1 and 2, and various configurations used in a known bronchoscope can be changed.
[ Treatment tool insertion hose ]
Fig. 3 is a side view of the treatment instrument insertion hose 23. Fig. 4 is an enlarged view of a portion indicated by an ellipse C of the treatment instrument insertion hose 23 in fig. 3. Fig. 5 is an exploded view of the treatment instrument insertion hose 23.
As shown in fig. 3 to 5, the treatment instrument insertion hose 23 (also referred to as a treatment instrument insertion passage) is a resin hose corresponding to the endoscope hose of the present utility model, and is connected to the treatment instrument lead-out 44 via the treatment instrument lead-in 24 and a known branching portion (not shown), and guides the treatment instrument inserted into the treatment instrument lead-in port 24 to the treatment instrument lead-out port 44. In fig. 3 and 4, symbol WA represents a bending portion range indicating the range of the passive bending portion 31 and the bending portion 32 in the insertion portion 12, and symbol WB represents a soft portion range indicating the range of the soft portion 30 in the insertion portion 12.
The treatment instrument insertion hose 23 is composed of a distal end side hose 50, a coil 58 wound (wound) around the outer surface of the distal end side hose 50, a proximal end side hose 60, and a connection tube 70. In fig. 3, the coil 58 is not shown in order to prevent complication of the drawing.
The distal hose 50 is disposed within the bending section area WA, that is, within the bending section 32 and within the passive bending section 31. The distal end side hose 50 is, for example, a PTFE (polytetrafluoroethylene) hose. Here, the passive bending portion 31 is also included in the "bending portion" of the present utility model. Further, the entire distal end side hose 50 need not be disposed in the bending portion range WA, but a part of the distal end side hose 50 (for example, a 1 st hose base end portion 54 described later) may be disposed in the soft portion 30, which is the soft portion range WB.
The distal end side hose 50 has a1 st hose distal end portion 52 connected to the treatment instrument outlet 44 and a1 st hose proximal end portion 54 (corresponding to a hose proximal end portion of the present utility model) connected to a distal end side of a connecting tube 70 described later.
A spiral groove 56, which is a spiral groove for winding a coil 58, is formed in the entire region (including almost the entire region) of the outer surface of the tip side hose 50, that is, the 1 st hose outer surface 50a (refer to fig. 4 and the like). In addition, the spiral groove 56 may be formed in a part of the 1 st hose outer surface 50a, instead of forming the spiral groove 56 in the entire area of the 1 st hose outer surface 50 a. That is, the spiral groove 56 may be formed in at least a part of the 1 st hose outer surface 50 a.
The coil 58 is wound around the spiral groove 56 formed in the 1 st hose outer surface 50a of the 1 st hose front end portion 52. Thus, the coil 58 is wound around the entire region (including almost the entire region) of the 1 st hose outer surface 50a of the 1 st hose 50 on the distal end side of the 1 st hose base end portion 54. In other words, the 1 st hose base end portion 54 is located closer to the base end side of the distal end side hose 50 than the base end of the coil 58. In addition, instead of winding the coil 58 around the entire spiral groove 56, the coil 58 may be wound around a part of the spiral groove 56. That is, the coil 58 may be wound around at least a part of the spiral groove 56 on the distal end side of the 1 st hose base end portion 54. The coil 58 prevents the distal end side hose 50 from buckling when the bent portion 32 and the passive bent portion 31 are bent. The 1 st hose base end 54 will be described later (see fig. 8 described later).
The outer diameter of the coil 58 is smaller than at least one of the outer diameter of the 1 st hose base end portion 54 and the outer diameter of a 2 nd hose distal end portion 62 of the base end side hose 60, which will be described later. Thereby, the diameter of the distal hose 50 around which the coil 58 is wound is prevented from becoming large.
The base end side hose 60 is disposed in the soft portion range WB, that is, in the soft portion 30. The proximal hose 60 is, for example, a PTFE (polytetrafluoroethylene) hose. The proximal hose 60 has a 2 nd hose distal end 62 connected to the proximal end of the connection tube 70 and a 2 nd hose proximal end, not shown, connected to the treatment instrument inlet 24.
The outer surface of the base end side hose 60, namely the 2 nd hose outer surface 60a, is a smooth surface. The smooth surface as referred to herein means a surface on which the spiral groove 56 for winding the coil 58 is not formed.
The connection pipe 70 is disposed within the soft portion range WB, i.e., within the soft portion 30. In the present embodiment, the connection pipe 70 is disposed in the soft portion 30 at a position between 200mm and 400mm from the distal end (distal end surface 34 a) of the insertion portion 12. The connection pipe 70 connects the distal end side hose 50 and the proximal end side hose 60.
Fig. 6 is an enlarged view of the connection pipe 70. Fig. 7 is an enlarged sectional view of the connection pipe 70. As shown in fig. 5 to 7, the connection pipe 70 includes a pipe distal end portion 72 to which the 1 st hose proximal end portion 54 is externally fitted, and a pipe proximal end portion 74 to which the 2 nd hose distal end portion 62 is externally fitted.
Since the outer diameter of the pipe distal end portion 72 is slightly larger than the inner diameter of the 1 st hose proximal end portion 54, when the 1 st hose proximal end portion 54 is externally fitted to the pipe distal end portion 72, the 1 st hose proximal end portion 54 is expanded in diameter by the pipe distal end portion 72. Similarly, since the outer diameter of the tube base end portion 74 is slightly larger than the inner diameter of the 2 nd hose end portion 62, when the 2 nd hose end portion 62 is externally fitted to the tube base end portion 74, the 2 nd hose end portion 62 is expanded in diameter by the tube base end portion 74.
The 1 st hose base end 54 and the tube front end 72 are fixed by an adhesive (for example, epoxy resin) not shown. Similarly, the 2 nd hose end portion 62 and the tube base end portion 74 are also fixed with an adhesive.
A flange 76 protruding to the radial outside of the connection pipe 70 is provided on the outer surface of the connection pipe 70, i.e., the pipe outer surface 70 a. The flange 76 is abutted against the distal end of the 2 nd hose distal end 62 externally fitted to the pipe distal end 74 by the proximal end of the 1 st hose proximal end 54 externally fitted to the pipe distal end 72. Thereby, the base end of the 1 st hose base end portion 54 and the tip end of the 2 nd hose tip end portion 62 can be positioned. The gaps for filling with the adhesive may be provided between the base end of the 1 st hose base end portion 54 and the flange 76 and between the tip end of the 2 nd hose tip end portion 62 and the flange 76.
A distal-side enlarged diameter surface 78a and a proximal-side enlarged diameter surface 78b are formed on the inner surface of the connection pipe 70, i.e., the pipe inner surface 78 (see fig. 7).
The distal-side enlarged diameter surface 78a is a tube inner surface 78 of the tube distal end portion 72, and is a tapered surface that gradually enlarges the inner diameter of the tube distal end portion 72 toward the distal end side of the tube distal end portion 72. The base end-side expansion surface 78b is a tube inner surface 78 of the tube base end portion 74, and is a tapered surface that gradually expands the inner diameter of the tube base end portion 74 toward the base end side of the tube base end portion 74.
By forming the distal-side expansion surface 78a, a step difference generated between the inner surface of the 1 st hose base end portion 54 and the inner surface (distal-side expansion surface 78 a) of the pipe distal end portion 72 at the connection portion of the 1 st hose base end portion 54 and the pipe distal end portion 72 becomes small. Further, by forming the base end-side enlarged diameter surface 78b, a step difference generated between the inner surface of the tube base end portion 74 (base end-side enlarged diameter surface 78 b) and the inner surface of the 2 nd hose end portion 62 becomes small at the connecting portion of the tube base end portion 74 and the 2 nd hose end portion 62. Thus, when the distal end portion of the treatment instrument inserted into the treatment instrument insertion hose 23 passes through the connection tube 70, the distal end portion of the treatment instrument is prevented from being caught by these steps. As a result, the distal end portion of the treatment instrument inserted into the flexible tube 23 can be smoothly moved.
In the present embodiment, both the distal end side expansion surface 78a and the proximal end side expansion surface 78b are formed on the pipe inner surface 78, but only one of them may be formed. Further, the distal end side expansion surface 78a and the proximal end side expansion surface 78b may include a portion having no inner diameter change or may be formed in a curved shape as long as smooth movement of the distal end portion of the treatment tool is not hindered.
[ 1 St hose base end ]
Fig. 8 is an enlarged view of the 1 st hose base end 54. As shown in fig. 8, the 1 st hose base end portion 54 has an unwrapped area W1. The non-winding region W1 is a region in which the spiral groove 56 is formed in the 1 st hose outer surface 50a, and the coil 58 is not wound around the spiral groove 56. The non-winding region W1 includes a connection region W1A and a non-connection region W1B.
The connection region W1A is a region on the most proximal side of the 1 st hose base end portion 54, and is fitted and connected to the pipe tip portion 72 so as to be in contact with the pipe tip portion 72.
The non-connection region W1B is a region that is provided continuously to the distal end side of the connection region W1A and is located further toward the distal end side than the tube distal end portion 72. The length of the non-connected region W1B is, for example, 40mm to 60mm. Further, a coil winding region W2 is continuously provided on the distal end side of the non-connection region W1B, that is, the distal end side of the 1 st hose base end portion 54. The coil winding area W2 is an area where the coil 58 is wound around the spiral groove 56 formed in the 1 st hose outer surface 50 a.
Here, when the non-connection region W1B is not provided on the distal end side of the connection region W1A, that is, when the coil 58 is wound on the 1 st hose outer surface 50a of the 1 st hose base end portion 54 to the nearest position of the connection region W1A, stress may be concentrated on the nearest position and buckling may occur when the bending portion 32 or the like of the insertion portion 12 is bent. Further, the coil 58 multiplies the connection region W1A, which may increase the outer diameter of the connection region W1A.
In contrast, in the present embodiment, by providing the non-connection region W1B on the distal end side of the connection region W1A, in which the coil 58 is not wound, when the bending portion 32 or the like of the insertion portion 12 is bent, the stress is not concentrated at the nearest position described above but is dispersed throughout the non-connection region W1B, so buckling of the 1 st hose base end portion 54 is prevented. The buckling preventing effect is also affected by the arrangement of the non-winding region W1. Here, since the 1 st hose base end portion 54 (the non-winding region W1) can be disposed in the soft portion 30 as described above, the effect of preventing buckling can be further obtained by being disposed in the soft portion 30 having a larger radius of curvature than by disposing the non-winding region W1 in the curved portion 32 having a smaller radius of curvature. Further, since the coil 58 is prevented from being multiplied by the connection region W1A when the bending portion 32 or the like of the insertion portion 12 is bent, the connection region W1A is prevented from being made large in diameter. As a result, buckling and thickening of the 1 st hose base end portion 54 of the distal end side hose 50 are prevented.
[ Others ]
In the above embodiment, the spiral groove 56 is formed in the entire area of the 1 st hose outer surface 50a of the 1 st hose base end portion 54, but an area where the spiral groove 56 is not formed in a partial area of the 1 st hose outer surface 50a may be provided.
In the above-described embodiment, the coil 58 is wound around the spiral groove 56 formed in the 1 st hose outer surface 50a of the tip side hose 50, but the method of winding the coil 58 around the 1 st hose outer surface 50a is not limited to the spiral groove 56, and the present utility model can be applied to a case where the coil 58 is wound around the 1 st hose outer surface 50a by a method other than the spiral groove 56.
In the above embodiment, the 1 st hose base end portion 54 of the distal end side hose 50 and the 2 nd hose distal end portion 62 of the proximal end side hose 60 are externally connected to the connection pipe 70, but the connection method of the 1 st hose base end portion 54 and the 2 nd hose distal end portion 62 to the connection pipe 70 is not particularly limited.
In the above embodiment, the passive bending portion 31 is provided in the insertion portion 12, but the present utility model can be applied to a case where the passive bending portion 31 is not provided in the insertion portion 12 and the soft portion 30 is directly connected to the base end of the bending portion 32.
In the above embodiment, the 2 nd hose outer surface 60a of the base end side hose 60 is formed as a smooth surface, but the spiral groove 56 may be formed in at least a part of the 2 nd hose outer surface 60a and the coil 58 may be wound around at least a part of the spiral groove 56, similarly to the tip end side hose 50. In this case, the 2 nd hose end portion 62 may be formed in the same structure as the 1 st hose base end portion 54. That is, the spiral groove 56 is formed in the 2 nd hose outer surface 60a from the distal end side toward the proximal end side of the 2 nd hose distal end portion 62, and the proximal end side connection region and the proximal end side non-connection region (not shown) of the coil 58 are not wound around the spiral groove 56.
The base end side connection region corresponds to the connection region W1A, and is externally connected to the tube base end 74. The base end side non-connection region is a region corresponding to the non-connection region W1B, and is located on the base end side of the base end side connection region (the tube base end portion 74). This prevents buckling and thickening of the 2 nd hose distal end portion 62 of the base end side hose 60 for the same reason as in the distal end side hose 50.
In the above-described embodiment, the treatment instrument insertion hose 23 has been described as an example of the endoscope hose of the present utility model, but the present utility model can be applied to various hoses (channels) inserted into the insertion portion 12.
In the above-described embodiments, the description has been made by taking as an example an endoscope of the present utility model, which requires a bronchoscope having a small diameter in particular, but the present utility model can be applied to, for example, various endoscopes in which a flexible tube for an endoscope is inserted into various insertion portions such as an ultrasonic endoscope and a digester endoscope.
Claims (10)
1. A flexible tube for an endoscope is inserted into an insertion portion of the endoscope, characterized in that,
The endoscope tube is provided with:
A front end side hose;
A coil wound around at least a part of the outer surface of the front end side hose, namely, the 1 st hose outer surface;
base end side hose
A connection pipe connecting the front end side hose and the base end side hose,
The front end side hose has a hose base end portion located closer to a base end side of the front end side hose than a base end of the coil,
The hose base end portion has a connection region connected to the connection pipe and in contact with the connection pipe, and a non-connection region located closer to the distal end side of the distal end side hose than the connection pipe.
2. An endoscope hose according to claim 1, wherein,
At least a part of the outer surface of the 1 st hose is formed with a spiral groove,
The coil is wound around at least a part of the groove on the front end side of the front end side hose than the hose base end portion,
The groove is formed in the 1 st hose outer surface of the hose base end portion.
3. An endoscope hose according to claim 1 or 2, wherein,
A flange protruding radially outward of the connection pipe is provided on an outer surface of the connection pipe,
The flange is abutted with a base end of the hose base end portion and a tip end of the base end side hose.
4. An endoscope hose according to claim 1 or 2, wherein,
The endoscope tube is provided with at least one of a front end-side expansion surface and a base end-side expansion surface,
The front end side diameter-expanding surface is formed on the inner surface of the front end portion of the connecting pipe, that is, the pipe front end portion, and expands the inner diameter of the pipe front end portion toward the front end side of the pipe front end portion,
The base end-side expanded diameter surface is formed on an inner surface of a base end portion of the connection pipe, that is, a pipe base end portion, and expands an inner diameter of the pipe base end portion toward a base end side of the pipe base end portion.
5. An endoscope hose according to claim 1, wherein,
The outer surface of the base end side hose, namely the outer surface of the 2 nd hose is a smooth surface.
6. An endoscope hose according to claim 1 or 2, wherein,
The length of the non-connected region is 40mm to 60mm.
7. An endoscope hose according to claim 1 or 2, wherein,
The base end side hose has a hose front end portion connected to the connection pipe,
The coil has an outer diameter smaller than an outer diameter of at least one of the hose base end portion and the hose front end portion.
8. An endoscope, which is characterized in that,
The endoscope is provided with:
an insertion part having a bending part and a soft part connected with the bending part, and
The flexible tube for an endoscope according to any one of claims 1 to 7, which is inserted into the insertion portion.
9. An endoscope as in claim 8 wherein,
The front end side hose is disposed in the bending portion,
The base end side hose and the connecting pipe are disposed in the soft portion.
10. An endoscope as in claim 9 wherein,
The connection pipe is disposed at a position between 200mm and 400mm from the front end of the insertion portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023-091128 | 2023-06-01 | ||
| JP2023091128A JP2024173018A (en) | 2023-06-01 | 2023-06-01 | Endoscope tube and endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222533252U true CN222533252U (en) | 2025-02-28 |
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ID=93799165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421002821.4U Active CN222533252U (en) | 2023-06-01 | 2024-05-09 | Endoscope hose and endoscope |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2024173018A (en) |
| CN (1) | CN222533252U (en) |
-
2023
- 2023-06-01 JP JP2023091128A patent/JP2024173018A/en active Pending
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2024
- 2024-05-09 CN CN202421002821.4U patent/CN222533252U/en active Active
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| Publication number | Publication date |
|---|---|
| JP2024173018A (en) | 2024-12-12 |
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