Distal end component portion, endoscope insertion portion, endoscope and ultrasound endoscope

Abstract

To provide a distal end component portion preventing a distal end member from being damaged by a wire of a brush for cleaning.SOLUTION: A distal end component portion includes: a distal end member arranged in a distal end of an insertion portion of an endoscope; and a liquid channel communicating with a proximal end side from an opening on an outer surface of the distal end member, and having a bent part disposed in a predetermined position at the proximal end side from the opening. The liquid channel includes: a first portion extending from the bent part toward the distal end side to the opening along a first direction; and a second portion extending from the bent part toward the distal end side along a second direction forming a first angle that is an obtuse angle to the first direction. The distal end member is formed with a first recess that recesses to an opposite side to a direction in which the first direction is bent in the second direction from the opening.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a tip configuration portion, an endoscope insertion portion, an endoscope, and an ultrasonic endoscope. [Background technology]

[0002] 2. Description of the Related Art A technique is known in which air, degassed water, or the like is injected into a balloon attached to the tip of an insertion part that is inserted into a subject, and the balloon is brought into close contact with an observation site such as the digestive tract.

[0003] Patent Document 1 describes a technique for injecting air into a balloon through an air hole formed through the distal end hard part (tip member) to inflate the balloon. It also describes that the opening of the air hole is inclined with respect to the longitudinal direction of the insertion part, making it easier to insert a cleaning brush through the opening of the air hole.

[0004] The cleaning brush is attached to the end of a long wire in order to clean the entire pipe communicating with the air hole. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-230950 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, if the entrance of the air hole is inclined with respect to the longitudinal direction of the insertion portion, the wire of the cleaning brush may come into contact with the edge of the entrance and damage the tip member.

[0007] The present invention has been made in consideration of the above, and aims to provide a tip component, an endoscope insertion portion, an endoscope, and an ultrasonic endoscope that prevent the tip member from being damaged by the wire of a cleaning brush. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems and achieve the object, a tip configuration portion according to one embodiment of the present invention comprises a tip member arranged at the tip of an insertion portion of an endoscope, and a fluid channel communicating with an opening formed on the outer surface of the tip member from the base end side and having a bent portion provided at a predetermined position from the opening to the base end side, wherein the fluid channel has a first portion extending from the bent portion toward the tip end side along a first direction to the opening, and a second portion extending from the bent portion toward the base end side along a second direction that forms a first angle with the first direction, which is an obtuse angle, and the tip member is formed with a first recess that is recessed from the opening on the side opposite to the direction in which the first direction is bent with respect to the second direction.

[0009] In addition, in a tip component according to one aspect of the present invention, the first recess has an inclined portion extending toward the tip side in a third direction that forms a second angle with the second direction that is greater than the first angle.

[0010] In the tip configuration portion according to one aspect of the present invention, the second direction is a direction along the longitudinal direction of the insertion portion.

[0011] In the tip configuration portion according to one aspect of the present invention, the opening has a circular shape, and the first recess is an enlarged diameter portion that enlarges the diameter of the circle.

[0012] In the tip configuration portion according to one aspect of the present invention, the opening has a circular shape, and the first recess has a semicircular shape with a diameter smaller than that of the circular shape.

[0013] In the tip constructing portion according to one aspect of the present invention, the first recess has a recessed depth of 0.3 mm or more.

[0014] In addition, in the tip component according to one aspect of the present invention, a second recess is formed in the tip member, recessed from the opening in a direction in which the first direction is bent with respect to the second direction.

[0015] In addition, in one aspect of the tip component of the present invention, the tip member has a tip surface that intersects with the longitudinal direction of the insertion portion and a side surface along the longitudinal direction, and the opening is formed in the tip surface.

[0016] In addition, in the tip component according to one aspect of the present invention, the tip member has a balloon groove for engaging a balloon band, and the opening is formed on the tip side of the balloon groove.

[0017] In addition, in one aspect of the tip component of the present invention, the tip member has a tip surface that intersects with the longitudinal direction of the insertion portion and a side surface along the longitudinal direction, and the opening is formed in the side surface.

[0018] In addition, in one embodiment of the tip component of the present invention, the tip member has a first balloon groove that engages a balloon band on the base end side, and a second balloon groove that is located further distal than the first balloon groove and engages the balloon band on the tip end side, and the opening is formed between the first balloon groove and the second balloon groove.

[0019] An endoscope insertion section according to one aspect of the present invention includes a tip configuration portion and an insertion section having the tip configuration portion disposed at its tip.

[0020] An endoscope according to one aspect of the present invention includes a tip configuration portion and an insertion portion having the tip configuration portion disposed at its tip.

[0021] In addition, an ultrasonic endoscope according to one aspect of the present invention comprises a tip component portion and an insertion section having the tip component portion disposed at its tip, and an ultrasonic transducer is disposed in the tip component portion. Effect of the Invention

[0022] According to the present invention, it is possible to realize a tip configuration section, an endoscope insertion section, an endoscope, and an ultrasonic endoscope in which the tip member is prevented from being damaged by the wire of a cleaning brush. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram illustrating an endoscope system according to an embodiment. [Diagram 2] FIG. 2 is a view taken along the arrow A in FIG. [Diagram 3] FIG. 3 is a view taken along the arrow B in FIG. [Figure 4] FIG. 4 is a cross-sectional view perpendicular to the longitudinal direction of the tip component. [Diagram 5] FIG. 5 is a cross-sectional view taken along the longitudinal direction of the tip component. [Figure 6] FIG. 6 is a view of the balloon water supply port as seen from the tip side. [Figure 7] FIG. 7 is a schematic diagram of a brush. [Figure 8] FIG. 8 is a cross-sectional view taken along the longitudinal direction of the tip forming portion according to the first modification. [Figure 9] FIG. 9 is a view of the balloon water supply port as viewed from the tip side. [Figure 10] FIG. 10 is a cross-sectional view taken along the longitudinal direction of the tip forming portion according to the second modification. [Figure 11] FIG. 11 is a cross-sectional view taken along the longitudinal direction of the tip forming portion according to the third modification. [Figure 12] FIG. 12 is a partial enlarged view of the imaging unit. [Figure 13] FIG. 13 is a cross-sectional view of the tip member. [Figure 14] FIG. 14 is a partial enlarged view of the distal end of the treatment instrument channel. [Figure 15] FIG. 15 is a cross-sectional view of the treatment instrument channel block. [Figure 16] FIG. 16 is a perspective view of the treatment instrument channel block. [Figure 17] FIG. 17 is a cross-sectional view of the treatment instrument channel block. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, embodiments of a tip configuration section, an endoscope insertion section, an endoscope, and an ultrasonic endoscope according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to these embodiments. The present invention can be generally applied to tip configuration sections, endoscope insertion sections, endoscopes, and ultrasonic endoscopes.

[0025] In addition, in the drawings, the same or corresponding elements are appropriately labeled with the same reference numerals. It should be noted that the drawings are schematic, and the dimensional relationships and ratios of each element may differ from the actual situation. The drawings may also include parts with different dimensional relationships and ratios.

[0026] (Embodiment) [Configuration of the endoscope system] Fig. 1 is a diagram showing a schematic diagram of an endoscope system according to an embodiment. The endoscope system 1 is a system for performing ultrasonic diagnosis inside a subject such as a human being using an ultrasonic endoscope. As shown in Fig. 1, the endoscope system 1 includes an ultrasonic endoscope 2, an ultrasonic observation device 3, an endoscopic observation device 4, a display device 5, and a light source device 6.

[0027] The ultrasonic endoscope 2 converts the electrical pulse signal received from the ultrasonic observation device 3 into an ultrasonic pulse using an ultrasonic transducer provided at its tip and irradiates the subject with the ultrasonic pulse. It also converts the ultrasonic echo reflected by the subject into an electrical echo signal represented by a voltage change and outputs it.

[0028] The ultrasonic endoscope 2 usually has an imaging optical system and an imaging element, and is inserted into the digestive tract (esophagus, stomach, duodenum, large intestine) or respiratory tract (trachea, bronchi) of a subject, and is capable of imaging either the digestive tract or the respiratory tract. It is also capable of imaging the surrounding organs (pancreas, gallbladder, bile duct, biliary tract, lymph nodes, mediastinal organs, blood vessels, etc.) using ultrasound. The ultrasonic endoscope 2 also has a light guide that guides illumination light to be irradiated to the subject during optical imaging. The tip of this light guide reaches the tip of the insertion part of the ultrasonic endoscope 2 into the subject, while the base end is connected to a light source device 6 that generates illumination light.

[0029] As shown in FIG. 1, the ultrasonic endoscope 2 includes an insertion section 21, an operation section 22, a universal cord 23, and a connector 24.

[0030] The insertion section 21 is a portion that is inserted into the subject. As shown in Fig. 1, the insertion section 21 is provided at the tip side of the ultrasonic endoscope 2, and includes a rigid tip member 211 that holds a convex ultrasonic transducer 7, a bending tube 212 that bends in a bending direction perpendicular to the central axis, and an insertion tube 213 that is flexible and has a central axis. The tip member 211 is provided at the tip side of the bending tube 212, the bending tube 212 is provided at the tip side of the insertion tube 213, and the insertion tube 213 is provided at the tip side of the operation unit 22. The configuration of the tip of the insertion section 21 and the configuration of the bending tube 212 will be described later.

[0031] The operation section 22 is connected to the base end side of the insertion section 21 and is a section that receives various operations from an operator such as a doctor. As shown in Fig. 1, the operation section 22 includes a bending knob 221 that receives a bending operation for bending the bending tube 212, and a plurality of operation members 222 for performing various operations. The operation section 22 also includes a treatment tool insertion port 223 that communicates with a treatment tool insertion passage and allows a treatment tool to be inserted into the treatment tool insertion passage.

[0032] The universal cord 23 extends from the operation unit 22 and is a cable in which a plurality of signal cables for transmitting various signals, optical fibers for transmitting illumination light supplied from the light source device 6, and the like are arranged.

[0033] The connector 24 is provided at the tip of the universal cord 23. The connector 24 includes a first connector portion 241 to which the ultrasonic cable 31 is connected, a second connector portion 242 to which the video cable 41 is connected, and a third connector portion 243 to which the optical fiber cable 61 is connected.

[0034] The ultrasonic observation device 3 is electrically connected to the ultrasonic endoscope 2 via an ultrasonic cable 31 (see FIG. 1), and outputs a pulse signal to the ultrasonic endoscope 2 via the ultrasonic cable 31, and also receives an echo signal from the ultrasonic endoscope 2. The ultrasonic observation device 3 then performs a predetermined process on the echo signal to generate an ultrasonic image.

[0035] The endoscopic observation device 4 is electrically connected to the ultrasonic endoscope 2 via a video cable 41 (see FIG. 1), and receives an image signal from the ultrasonic endoscope 2 via the video cable 41. The endoscopic observation device 4 then performs a predetermined process on the image signal to generate an endoscopic image.

[0036] The display device 5 is constructed using liquid crystal or organic EL (ElectroLuminescence), a projector, CRT (Cathode Ray Tube), etc., and displays ultrasound images generated by the ultrasound observation device 3, endoscopic images generated by the endoscopic observation device 4, etc.

[0037] The light source device 6 is connected to the ultrasonic endoscope 2 via an optical fiber cable 61 (see FIG. 1), and supplies, via the optical fiber cable 61, the ultrasonic endoscope 2 with illumination light that illuminates the inside of the subject.

[0038] [Configuration of tip component] 2 is a view seen from the arrow A in FIG. 1. FIG. 3 is a view seen from the arrow B in FIG. 2. As shown in FIG. 2 and FIG. 3, in the tip configuration part 10 arranged at the tip of the insertion part 21 of the ultrasonic endoscope 2, an imaging lens 101 for collecting light from the subject, an illumination lens 102 for irradiating illumination light into the subject, a treatment tool outlet 103 for outletting a treatment tool such as forceps, a treatment tool lifting stand 104 for lifting the treatment tool toward the upper side of FIG. 3, an air / water supply outlet 105 which is an opening for releasing a gas such as air or a liquid such as water, a balloon water supply outlet 106 which is an opening for sending a liquid such as water into a balloon, and a balloon suction outlet 107 which is an opening for sucking a liquid such as water from inside the balloon are arranged at the tip of the tip member 211. The tip member 211 has a balloon groove 2111 for engaging a balloon band, and the balloon water supply outlet 106 is formed on the tip side of the balloon groove 2111.

[0039] [Internal configuration of tip component] Fig. 4 is a cross-sectional view perpendicular to the longitudinal direction of the tip component. As shown in Fig. 4, inside the tip member 211, a signal cable 111 for transmitting an image signal obtained by converting light received by the imaging lens 101, a light guide 112 for transmitting illumination light to the illumination lens 102, a channel tube 113 through which a treatment tool is inserted, a transducer cable 114 for transmitting and receiving signals to the ultrasonic transducer 7, an air / water supply tube 115 for transmitting gas or liquid to the air / water supply port 105, a balloon water supply tube 116 for transmitting liquid to the balloon water supply port 106, a balloon suction tube 117 for transmitting liquid aspirated from the balloon suction port 107, a treatment tool raising tube 118 through which a treatment tool raising wire 119 is inserted, and a treatment tool raising wire 119 for raising the treatment tool raising stand in response to an operation on the operation unit 22 are inserted.

[0040] [Configuration of balloon water supply channel] Fig. 5 is a cross-sectional view along the longitudinal direction of the tip configuration part. As shown in Fig. 5, the tip configuration part 10 includes a tip member 211 disposed at the tip of the insertion part 21 of the ultrasonic endoscope 2, and a balloon water supply channel 1060 which is a fluid channel that communicates with a balloon water supply port 106 formed on the outer surface of the tip member 211 to the base end side, has a bending part 1061 provided at a predetermined position on the base end side from the balloon water supply port 106, and has a balloon water supply tube 116 connected to the base end side.

[0041] The balloon water supply channel 1060 has a first portion 1062 extending from the bent portion 1061 toward the distal end along a first direction D1 to the balloon water supply port 106, and a second portion 1063 extending from the bent portion 1061 toward the proximal end along a second direction D2 that forms a first angle A1 with the first direction D1, which is an obtuse angle. The second direction D2 is a direction along the longitudinal direction of the insertion portion 21, but may be a direction intersecting the longitudinal direction of the insertion portion 21.

[0042] The tip member 211 has a tip surface intersecting the longitudinal direction of the insertion section 21 and a side surface along the longitudinal direction, and the balloon water supply port 106 is formed on the tip surface. The tip member 211 has a first recess 1064 recessed from the balloon water supply port 106 to the opposite side to the direction in which the first direction D1 is bent with respect to the second direction D2 (upward in FIG. 5). The first recess 1064 has an inclined portion extending toward the tip side toward a third direction D3 that forms a second angle A2 with the second direction D2 that is larger than the first angle A1. The depth De1 of the recessed first recess 1064 is, for example, 0.3 mm or more. The first recess 1064 may be an expanded diameter portion in which the diameter of a circle is expanded.

[0043] 6 is a view of the balloon water supply port as viewed from the tip side. As shown in FIG. 6, the balloon water supply port 106 has a circular shape. The first recess 1064 has a semicircular shape with a smaller diameter than the circular shape of the balloon water supply port 106.

[0044] [Brush configuration] FIG. 7 is a schematic diagram of the brush. The brush 300 shown in FIG. 7 is inserted from the operation unit 22 side and protruded from the balloon water supply port 106, thereby cleaning the entire balloon water supply channel 1060. The brush 300 has a wire 301, a tip tip 302, and a brush part 303. The tip tip 302 is formed by crimping a metal part to the tip of the wire 301. As a result, the tip tip 302 forms a step in a direction perpendicular to the longitudinal direction of the wire 301. The height of this step in a direction perpendicular to the longitudinal direction of the wire 301 is less than 0.3 mm.

[0045] According to the tip component 10 described above, the first recess 1064 is formed in the tip member 211, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106 gets caught on the edge of the balloon water supply port 106, preventing the tip member 211 from being damaged.

[0046] Furthermore, by making the depth De1 of the first recess 1064 0.3 mm or more, the depth De1 of the first recess 1064 is greater than the height of the step formed by the tip tip 302, thereby reliably preventing the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106 from getting caught on the edge of the balloon water supply port 106.

[0047] In addition to the balloon water supply port 106, the same configuration as in the embodiment may be adopted for the air and water supply port 105 or the balloon suction port 107. In this case, it is possible to prevent the tip member from being damaged by the wire of the cleaning brush.

[0048] The tip member 211 may have a tip surface intersecting the longitudinal direction of the insertion section 21 and a side surface along the longitudinal direction, and the balloon water supply port 106 may be formed on the side surface. The tip member 211 may have a first balloon groove for engaging the balloon band on the base end side, and a second balloon groove located on the distal side of the first balloon groove for engaging the balloon band on the distal side, and the balloon water supply port 106 may be formed between the first balloon groove and the second balloon groove.

[0049] (Variation 1) Fig. 8 is a cross-sectional view along the longitudinal direction of the tip configuration part according to the first modification. Fig. 9 is a view of the balloon water supply port from the tip side. As shown in Figs. 8 and 9, a first recess 1064A recessed from the balloon water supply port 106A to the opposite side to the direction in which the first direction is bent with respect to the second direction (upward in Fig. 8) is formed in the tip member 211A of the tip configuration part 10A. Furthermore, a second recess 1065A recessed from the balloon water supply port 106A to the direction in which the first direction is bent with respect to the second direction is formed in the tip member 211A.

[0050] According to the tip component 10A described above, the first recess 1064A is formed in the tip member 211A, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106A gets caught on the lower edge of the balloon water supply port 106A, preventing the tip member 211A from being damaged.

[0051] Furthermore, according to the tip component 10A, a second recess 1065A is formed in the tip member 211A, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106A gets caught on the upper edge of the balloon water supply port 106A, preventing the tip member 211A from being damaged.

[0052] (Variation 2) Fig. 10 is a cross-sectional view along the longitudinal direction of the tip configuration part according to the second modification. As shown in Fig. 10, a first recess 1064B is formed in the tip member 211B of the tip configuration part 10B, which is recessed in the opposite direction (upward in Fig. 10) from the balloon water supply port 106B in which the first direction is bent with respect to the second direction. The first recess 1064B has a smooth curved surface that forms an R shape toward the tip side. Furthermore, a second recess 1065B is formed in the tip member 211B, which is recessed in the direction in which the first direction is bent with respect to the second direction from the balloon water supply port 106B.

[0053] According to the tip component 10B described above, the first recess 1064B is formed in the tip member 211B, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106B gets caught on the lower edge of the balloon water supply port 106B, preventing the tip member 211B from being damaged.

[0054] Furthermore, according to the tip component 10B, a second recess 1065B is formed in the tip member 211B, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106B gets caught on the upper edge of the balloon water supply port 106B, preventing the tip member 211B from being damaged.

[0055] (Variation 3) FIG. 11 is a cross-sectional view along the longitudinal direction of the tip configuration part according to the third modification. As shown in FIG. 11, the tip member 211C of the tip configuration part 10C has a first recess 1064C recessed from the balloon water supply port 106C toward the opposite side to the direction in which the first direction is bent relative to the second direction (upward in FIG. 11). The first recess 1064C has an inclined portion extending toward the tip side toward the third direction D31 that forms a second angle A21 with the second direction D2 that is greater than the first angle A1. The second angle A21 is the smaller of the angle from the second direction D2 toward the third direction D31 counterclockwise and the angle from the second direction D2 toward the third direction D31 clockwise. When the second angle A21 is an angle from the second direction D2 toward the third direction D31 clockwise as in the third modification, it is sufficient that the angle satisfies 90°<second angle A21≦180°. Furthermore, the tip member 211C is formed with a second recess 1065C that is recessed in a direction in which the first direction is bent from the balloon water supply port 106C relative to the second direction.

[0056] According to the tip component 10C described above, a first recess 1064C is formed in the tip member 211C, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106C gets caught on the lower edge of the balloon water supply port 106C, preventing the tip member 211C from being damaged.

[0057] Furthermore, according to the tip component 10C, a second recess 1065C is formed in the tip member 211C, so that the base end surface of the tip tip 302 of the brush 300 protruding from the balloon water supply port 106C gets caught on the upper edge of the balloon water supply port 106C, preventing the tip member 211C from being damaged.

[0058] [Configuration of the imaging unit] Fig. 12 is a partial enlarged view of the imaging section. As shown in Fig. 12, the imaging section includes an imaging lens 101 located at the tip, an imaging unit 121 including an imaging element that converts light collected by the imaging lens 101 into an image signal, and a signal cable 111 that transmits the image signal generated by the imaging element to the endoscopic observation device 4.

[0059] Fig. 13 is a cross-sectional view of the tip member. As shown in Fig. 13, a butt portion 2112 is formed in the tip member 211. The butt portion 2112 is formed by removing a step by boring from the tip side. The imaging unit 121 is butted against this butt portion 2112 and fixed, and the imaging lens 101 is attached to form the imaging section.

[0060] In contrast, when boring from the base end side, a hole is created on the side, and a lid structure must be used to fill the hole. Since a lid structure is not desirable from the standpoint of reprocessing and cost, the lid structure can be avoided by boring from the tip end side.

[0061] [Configuration of treatment tool channel] Fig. 14 is a partial enlarged view of the distal end of the treatment instrument channel 1130. As shown in Fig. 14, the treatment instrument channel 1130 has a treatment instrument channel block 1131 disposed on the proximal end side of the treatment instrument outlet 103, and a channel tube 113 connected to the proximal end side of the treatment instrument channel block 1131.

[0062] Fig. 15 is a cross-sectional view of the treatment tool channel block. As shown in Fig. 15, the treatment tool channel block 1131 is provided with enlarged diameter portions 1131a and 1131b that enlarge the inner diameter from the base end side of the inclined portion inclined toward the treatment tool ejection port 103. As a result, the inner diameter Di2y on the tip side of the inclined portion is larger than the inner diameter Di1 on the base end side of the inclined portion.

[0063] Fig. 16 is a perspective view of the treatment tool channel block. As shown in Fig. 16, the enlarged diameter portions 1131a and 1131b are provided in the vertical direction (y direction), so that the vertical inner diameter Di2y is larger than the horizontal inner diameter Di2x (x direction). As a result, the distal end side of the treatment tool channel block 1131 forms an oval opening.

[0064] Returning to FIG. 14, when a large-diameter treatment tool T is inserted through the treatment tool channel 1130 and the treatment tool T is raised, point P1 becomes the force point and point P2 becomes the fulcrum. The position of fulcrum P2 is shifted toward the tip side by the enlarged diameter portion 1131a. As a result, the distance between point P1, which is the force point, and point P2, which is the fulcrum, becomes closer and the reaction force becomes smaller, so that the force required to raise the treatment tool T is reduced. Furthermore, by shifting the position of fulcrum P2 toward the tip side, the angle at which the treatment tool T is raised can be increased.

[0065] In addition, by forming the expanded diameter portion 1131b, when the treatment tool T is inserted into the treatment tool channel block 1131, the expanded diameter portion 1131b is connected to the base end side of the inclined portion at an angle greater than 180°, thereby preventing the treatment tool T from getting caught on the inclined portion.

[0066] Fig. 17 is a cross-sectional view of the treatment tool channel block. As shown in Fig. 17, the treatment tool channel block 1131A may have a step portion 1131Ab that enlarges the inner diameter from the base end side of the inclined portion inclined toward the treatment tool outlet 103. By forming the step portion 1131Ab, when the treatment tool T is inserted into the treatment tool channel block 1131, the treatment tool T is prevented from getting caught on the inclined portion.

[0067] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Thus, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0068] 1 Endoscope system 2. Ultrasound endoscope 3. Ultrasonic observation equipment 4 Endoscopic observation device 5 Display device 6 Light source device 7 Ultrasonic transducer 10, 10A, 10B, 10C tip components 21 Insertion section 22 Control section 23 Universal Code 24 Connectors 31 Ultrasonic Cable 41 Video Cable 61 Fiber optic cable 101 Imaging lens 102 Lighting lens 103 Treatment tool outlet 104 Treatment tool lift stand 105 Air and water supply port 106, 106A, 106B, 106C balloon water outlet 107 Balloon suction port 111 Signal cable 112 Light Guide 113 Channel Tube 114 Transducer cable 115 Air and water supply tube 116 Balloon water supply tube 117 Balloon Suction Tube 118 Treatment tool lifting tube 119 Treatment tool lifting wire 121 Imaging unit 211, 211A, 211B, 211C Tip parts 212 Curved Pipe 213 Insertion tube 221 Curved Knob 222 Operating member 223 Treatment tool insertion port 300 Brushes 301 Wire 302 Tip 303 Brush section 1060 Balloon Water Supply Channel 1061 Bend 1062 Part 1 1063 Part 2 1064, 1064A, 1064B, 1064C First recess 1065A, 1065B, 1065C Second recess 1030 Treatment tool channel 1131 Treatment tool channel block 1131a, 1131b Expanded diameter part 1131Ab Step 2112 Stopping part

Claims

1. a tip member disposed at the tip of the insertion section of the endoscope; a fluid channel that is in communication with a base end side from an opening formed on an outer surface of the tip member and has a bent portion provided at a predetermined position on the base end side from the opening; Equipped with The fluid channel comprises: a first portion extending from the bent portion toward a tip end side along a first direction to the opening; a second portion extending from the bent portion toward a base end side along a second direction that forms a first angle with the first direction, the second portion being an obtuse angle; having The tip component has a first recess formed in the tip member, the first recess being recessed from the opening toward the opposite side to the direction in which the first direction is bent relative to the second direction.

2. The tip component according to claim 1 , wherein the first recess has an inclined portion extending toward a tip side in a third direction that forms a second angle with the second direction that is greater than the first angle.

3. The tip configuration portion according to claim 1 , wherein the second direction is a direction along a longitudinal direction of the insertion portion.

4. The opening has a circular shape, The tip forming portion according to claim 1 , wherein the first recess is an enlarged diameter portion in which a diameter of the circle is enlarged.

5. The opening has a circular shape, The tip configuration portion according to claim 1 , wherein the first recess is semicircular in shape having a diameter smaller than that of the circular recess.

6. The tip component according to claim 1 , wherein the first recess has a recess depth of 0.3 mm or more.

7. The tip configuration portion according to claim 1 , wherein the tip member is formed with a second recess that is recessed from the opening in a direction in which the first direction is bent with respect to the second direction.

8. The tip member is The insertion portion has a tip surface that intersects with a longitudinal direction of the insertion portion and a side surface that is aligned along the longitudinal direction, The tip configuration portion according to claim 1 , wherein the opening is formed in the tip surface.

9. The tip member has a balloon groove for retaining a balloon band, The tip configuring portion according to claim 8 , wherein the opening is formed on a tip side of the balloon groove.

10. The tip member is The insertion portion has a tip surface that intersects with a longitudinal direction of the insertion portion and a side surface that is aligned along the longitudinal direction, The tip configuration portion according to claim 1 , wherein the opening is formed in the side surface.

11. The tip member has a first balloon groove for engaging a balloon band on a base end side, and a second balloon groove located on the tip side of the first balloon groove and for engaging a balloon band on a tip end side, The tip structure according to claim 10, wherein the opening is formed between the first balloon groove and the second balloon groove.

12. A tip component according to claim 1; an insertion section having the tip configuration section disposed at a tip thereof; An endoscope insertion portion comprising:

13. A tip component according to claim 1; an insertion section having the tip configuration section disposed at a tip thereof; An endoscope comprising:

14. A tip component according to claim 1; an insertion section having the tip configuration section disposed at a tip thereof; Equipped with An ultrasonic endoscope having an ultrasonic transducer disposed at the tip component portion.

Images