Insertion guide device for endoscope and endoscope system

Abstract

The invention provides an insertion guide device for an endoscope and an endoscope system, which can realize smooth and easy insertion and extraction of an endoscope insertion part in response to a specific internal structure of a subject, and can reliably guide the front end of the insertion part to a desired part in the subject. And reliable observation and inspection can be carried out. This insertion guide device for an endoscope is used in an endoscope provided with an insertion part that extends in the longitudinal direction and has a distal end and a base end, and guides the insertion of the insertion part into a subject, and is provided with: a flat plate-shaped member that extends in the longitudinal direction and has a distal end and a proximal end; the substrate has a width perpendicular to the long axis direction and a thickness perpendicular to the long axis direction and perpendicular to the width, and the thickness is formed to be smaller than the width. And a holding member that attaches and holds the distal end portion of the insertion portion to the width-direction side surface of the distal end side of the flat plate-shaped member, the flat plate-shaped member having a bent portion bent in the thickness direction at the distal end, and the holding member being disposed closer to the base end side than the bent portion.

Description

Technical Field

[0001] This invention relates to an insertion guide device for an endoscope and an endoscope system including the insertion guide device for an endoscope, which is used to guide the insertion of an endoscope insertion part into a confined space inside a subject such as a structure. Background Technology

[0002] Previously, endoscopic systems have been widely used in fields such as medicine and industry. In the industrial field, industrial endoscope systems are used to insert into the internal space of structures such as industrial plants or various engines (hereinafter referred to as the subject of inspection) through an insertion part equipped with a camera unit at the front end to observe and inspect the internal condition.

[0003] In industrial endoscope systems, the subjects being observed and examined are often characterized by complex internal structures and numerous confined spaces. It is well known that inserting a flexible insertion device into such complex and confined spaces is difficult.

[0004] Therefore, in such endoscopic systems, there is always a desire to develop techniques that enable smooth and easy insertion of the endoscope, regardless of the internal structure of the subject.

[0005] For example, regarding endoscopic insertion guide devices for use and guiding the insertion of an endoscope insertion part when inserting it into a confined space inside the body being examined, various solutions have been proposed in the past, for example, through Japanese Patent Application Publication No. 2018-189897 and Japanese Patent Application Publication No. 2012-14130.

[0006] The endoscope insertion guide device disclosed in Japanese Patent Application Publication No. 2018-189897 and Japanese Patent Application Publication No. 2012-14130 includes a flexible tubular member for the insertion portion of an endoscope to pass through, and a flat and elastic strip-shaped plate guide member. The tubular member is disposed on the plane of the strip-shaped plate member, and the front end of the tubular member is positioned and fixed in the front end region on the plane of the strip-shaped plate member.

[0007] With this structure, the conventional endoscopic insertion guide device described in the aforementioned publications can smoothly insert and withdraw the endoscopic insertion part into the internal space of tubing such as straight lines, vortices, or spirals, while guiding the front end of the endoscopic insertion part to the desired position inside the patient's body.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2018-189897

[0011] Patent Document 2: Japanese Patent Application Publication No. 2012-14130 Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] However, in conventional endoscopic insertion guide devices disclosed in Japanese Patent Application Publication Nos. 2018-189897 and 2012-14130, a structure is employed in which a tubular member is positioned and arranged on the plane (thickness direction) of the flat plate member. Therefore, for example, there is a tendency for the bending of the guide member in a specific direction (particularly the thickness direction of the flat plate member) to be hindered. Thus, in such conventional structures, it may be impossible to expect further improvements in the insertability of the endoscope insertion portion into the patient's body.

[0014] Furthermore, in the conventional structure of endoscopic insertion guide devices, since they are configured with a tubular component for the insertion part to pass through, there is a possibility of increasing the insertion diameter and the problem of increasing the size of the guide device itself.

[0015] Furthermore, the internal structure of the subject to which the endoscopic insertion guide device is used has become increasingly complex in recent years. For example, when the subject is to be observed, there are problems that conventional endoscopic insertion guide devices cannot adequately handle such a situation.

[0016] The purpose of this invention is to provide an endoscopic insertion guide device and an endoscopic system including the endoscopic insertion guide device, which enables smooth and easy insertion and removal of the endoscopic insertion part in response to specific internal structures of the subject, and reliably guides the tip of the endoscopic insertion part to the desired location inside the subject, thereby enabling reliable observation and examination.

[0017] Methods for solving problems

[0018] To achieve the above objective, an endoscopic insertion guide device according to one aspect of the present invention is used for an endoscope having an insertion portion to guide the insertion portion into a subject. The insertion portion extends along its long axis and has a front end and a base end. The endoscopic insertion guide device is characterized by comprising: a flat plate extending along the long axis, having a width perpendicular to the long axis and a thickness perpendicular to both the long axis and the width, the thickness being less than the width; and a retaining member that holds the front end portion of the insertion portion on a width-direction side of the front end of the flat plate, the flat plate having a curved portion at the front end that bends in the thickness direction, and the retaining member being disposed at a position closer to the base end than the curved portion.

[0019] An endoscope system according to one aspect of the present invention includes: an endoscope comprising an insertion portion, an operating portion, and a cable, the insertion portion extending along a long axis, having a front end and a base end, and being formed in an elongated tube shape; the operating portion being connected to the base end of the insertion portion and having various operating components; the cable extending from the operating portion; and an endoscope insertion guide device for guiding the insertion of the insertion portion, characterized in that the endoscope insertion guide device comprises: a flat plate member extending along the long axis of the insertion portion, having a width perpendicular to the long axis and a thickness perpendicular to both the long axis and the width, the thickness being less than the width; and a retaining member for mounting and retaining the front end portion of the insertion portion on the side of the flat plate member in the width direction, the flat plate member having a curved portion at the front end bending in the thickness direction, the retaining member being disposed at a position closer to the base end than the curved portion.

[0020] Invention Effects

[0021] According to the present invention, an endoscopic insertion guide device and an endoscope system including the endoscopic insertion guide device are provided. The endoscopic insertion guide device is capable of smoothly and easily inserting and withdrawing the endoscopic insertion part according to the specific internal structure of the subject, and can reliably guide the tip of the endoscopic insertion part to the desired location inside the subject, thereby enabling reliable observation and examination. Attached Figure Description

[0022] Figure 1 This is a schematic structural diagram illustrating an example of the structure of an endoscope system according to an embodiment of the present invention.

[0023] Figure 2 This is a magnified perspective view of a portion of the front end region of an endoscopic insertion guide device according to an embodiment of the present invention.

[0024] Figure 3yes Figure 2 The endoscope is inserted from the front using a guide device. Figure 2 The plan view observed in the direction indicated by the arrow [3] in the image;

[0025] Figure 4 An example illustrating the structure of a subject being examined using an endoscope system incorporating an insertion guide device according to an embodiment of the present invention is a schematic diagram showing a side cross-section of the internal structure of the subject.

[0026] Figure 5 From Figure 4 The diagram viewed from the direction of the arrow [5] (view of the insertion port from the front) is a diagram that schematically shows the expansion of the internal space of the subject.

[0027] Figure 6 This is a diagram showing the state in which the front end of the insertion guide device according to one embodiment of the present invention abuts against the vertical wall after being inserted into the internal space of the subject.

[0028] Figure 7 It means in Figure 6 After the state is reached, the diagram shows the effect of the insertion guide device changing its direction of travel when the front end faces upwards;

[0029] Figure 8 This is an enlarged perspective view of a portion of the front end region of an insertion guide device, representing a first modified example of an embodiment of the present invention.

[0030] Figure 9 yes Figure 8 The insertion guide device is from the front ( Figure 8 The plan view observed (in the direction indicated by the arrow [9] in the image);

[0031] Figure 10 yes Figure 8 A diagram illustrating the function of the insertion guide device;

[0032] Figure 11 This is a magnified perspective view of a portion of the front end region of an insertion guide device, representing a second variation of an embodiment of the present invention.

[0033] Figure 12 yes Figure 11 The insertion guide device is from the front ( Figure 11 The plan view observed in the direction indicated by the arrow

[12] in the middle;

[0034] Figure 13 yes Figure 11 The insertion guide device is located on the side ( Figure 11 The plan view observed in the direction indicated by the arrow

[13] in the image;

[0035] Figure 14 yes Figure 11 A diagram illustrating the function of the insertion guide device;

[0036] Figure 15 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a third variation of an embodiment of the present invention.

[0037] Figure 16 yes Figure 15 The insertion guide device is from the front ( Figure 15 The plan view observed in the direction indicated by the arrow

[16] in the middle;

[0038] Figure 17 This is a magnified perspective view of a portion of the front end region of an insertion guide device according to a fourth variation of an embodiment of the present invention.

[0039] Figure 18 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a fifth modified embodiment of the present invention.

[0040] Figure 19 This is a magnified perspective view of a portion of the front end region of an insertion guide device according to a sixth modified embodiment of the present invention.

[0041] Figure 20 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a seventh modified embodiment of the present invention.

[0042] Figure 21 This is a magnified perspective view of a portion of the front end region of an insertion guide device according to an eighth modified embodiment of the present invention.

[0043] Figure 22 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a ninth modified embodiment of the present invention.

[0044] Figure 23 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a tenth variation of an embodiment of the present invention.

[0045] Figure 24 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to an eleventh variation of an embodiment of the present invention.

[0046] Figure 25 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twelfth modified embodiment of the present invention.

[0047] Figure 26 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a thirteenth variation of an embodiment of the present invention.

[0048] Figure 27 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a fourteenth variation of an embodiment of the present invention.

[0049] Figure 28 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a fifteenth variation of an embodiment of the present invention.

[0050] Figure 29 This is a perspective view showing the schematic structure of the insertion guide device according to the sixteenth modified example of an embodiment of the present invention;

[0051] Figure 30 It means Figure 29 A diagram illustrating the function of the insertion guide device during the folding process;

[0052] Figure 31 It means Figure 29 A diagram illustrating the function of the insertion guide device in its folded-complete state;

[0053] Figure 32 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a seventeenth variation of an embodiment of the present invention.

[0054] Figure 33 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to an eighteenth variation of an embodiment of the present invention.

[0055] Figure 34 yes Figure 33 A diagram illustrating the function of the insertion guide device during storage;

[0056] Figure 35 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a nineteenth variation of an embodiment of the present invention.

[0057] Figure 36 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twentieth variation of an embodiment of the present invention.

[0058] Figure 37 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twenty-first modification of an embodiment of the present invention.

[0059] Figure 38 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twenty-second variation of an embodiment of the present invention.

[0060] Figure 39 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twenty-third variation of an embodiment of the present invention.

[0061] Figure 40 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twenty-fourth variation of an embodiment of the present invention.

[0062] Figure 41 This is an enlarged perspective view of a portion of the front end region of an insertion guide device according to a twenty-fifth variation of an embodiment of the present invention.

[0063] Label Explanation

[0064] 1: Endoscopic system;

[0065] 2: Endoscope;

[0066] 3: Main unit;

[0067] 4: Insert the guide device;

[0068] 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4I, 4J, 4K, 4L, 4M, 4N, 4P, 4Q, 4R, 4S, 4T, 4U, 4V, 4W, 4X, 4Y, 4Z: Endoscopic insertion guide devices;

[0069] 4a, 4Fa, 4Ga, 4Ha, 4Ia, 4Ja, 4Ka, 4La, 4Na, 4Qa, 4Ra, 4Sa, 4Ta, 4Ua, 4Va, 4Wa, 4Xa, 4Ya, 4Za: flat plate-shaped components;

[0070] 4b, 4Nb, 4Pb: Cylindrical components (retaining components);

[0071] 4ba: Through hole;

[0072] 4bb: Locking part;

[0073] 4c, 4c1, 4c2: Bending section;

[0074] 4d: Fixture;

[0075] 4e: Flexible printed circuit board;

[0076] 4f: Electrical components;

[0077] 4g1, 4g2, 4g3: gaps;

[0078] 4h: Neck retraction;

[0079] 4j1, 4j2, 4j3: Long slots;

[0080] 4jb: Slot opening;

[0081] 4k: Membrane components;

[0082] 4m: Hinge section;

[0083] 4ma: Through hole;

[0084] 4n: Plate-like block;

[0085] 4p: notch;

[0086] 4p1: Horizontal gap;

[0087] 4p2: Longitudinal gap;

[0088] 4q: Long, plate-shaped block;

[0089] 4r: Internal passageway;

[0090] 4S1: Equipment Holding Section;

[0091] 4s2, 4t: wire guide;

[0092] 4u: Sheet metal;

[0093] 4V: Support pin;

[0094] 4w: chimeric hole;

[0095] 4x: Hook;

[0096] 4Mbd, 4Mbu: Semi-cylindrical components;

[0097] 4Qd: Base end fixture;

[0098] 5: Insertion section;

[0099] 5a: Bending the operating lever;

[0100] 5b: Connector;

[0101] 6: Operations Department;

[0102] 6a: Operating components;

[0103] 6b: Connector;

[0104] 7: General-purpose cables;

[0105] 7a: Connector;

[0106] 8: Handling equipment, etc.;

[0107] 9: Bending the operating lever;

[0108] 9: Membrane components;

[0109] 10: Thread for bending;

[0110] 11: Retaining components;

[0111] 11a: Interior space;

[0112] 12: Sell;

[0113] 14a, 14b: Guide grooves;

[0114] 15a, 16a: Connecting pins;

[0115] 15b, 16b: Fixtures;

[0116] 100: Subject;

[0117] 101: Insertion port;

[0118] 102: Vertical wall. Detailed Implementation

[0119] The present invention will now be described with reference to illustrated embodiments. The accompanying drawings used in the following description are schematic. Therefore, in these drawings, each component is shown to a size that allows it to be identified on the drawing. Thus, the dimensional relationships, scales, etc., of the components in the drawings are sometimes represented differently for each component. The present invention is not limited to the illustrated manner in terms of the number, shape, size ratio, relative positional relationships, etc., of the components shown in the drawings.

[0120] [One Implementation Method]

[0121] First, the following is a brief description of the general structure of an endoscope system incorporating an insertion guide device for an endoscope according to an embodiment of the present invention. Figure 1 This is a schematic structural diagram illustrating an example of the structure of an endoscope system according to an embodiment of the present invention. Figure 2 This is a magnified perspective view of a portion of the front end region of an endoscopic insertion guide device according to an embodiment of the present invention. Figure 3 yes Figure 2 The endoscope is inserted from the front using a guide device. Figure 2 The plan view is observed in the direction indicated by the arrow [3].

[0122] like Figure 1 As shown, the endoscope system 1 is configured to include an endoscope 2, a main body 3, and an endoscope insertion guide device (hereinafter referred to as the insertion guide device) 4.

[0123] The endoscope 2 consists of an insertion part 5, an operating part 6, and a universal cable 7. The insertion part 5 extends along its long axis and has a front end and a base end, and is formed as a long and flexible tube shape.

[0124] Here, in the direction along the long axis of the insertion portion 5 of the endoscope 2, the end on the side where the front end portion is located is called the front end. The end on the opposite side of the front end, that is, the end on the side where the operating portion 6 is located, is called the base end.

[0125] Additionally, the insertion part 5 has a bending operation lever 5a and a connector 5b at its base end. The bending operation lever 5a is an operating component that performs a bending operation on a bending section (not shown) that forms a portion of the insertion part 5. Depending on the operation, the bending operation lever 5a pulls or relaxes multiple bending operation lines (not shown) that are freely inserted and retracted along the long axis direction inside the insertion part 5, thereby realizing the bending operation of the bending section.

[0126] Connector 5b is a connecting component that connects the insertion part 5 to the operation part 6. Connector 5b connects to connector 6b, which is provided on the front end side of the operation part 6, thereby connecting the insertion part 5 to the operation part 6.

[0127] The operation unit 6 is a structural unit having a connector 6b and multiple operation components 6a. These multiple operation components 6a are used to perform various operations on the endoscope 2, such as zooming in or out of the observation image displayed on the display screen (hereinafter referred to as the displayed image), adjusting the brightness of the displayed image, accessing the menu display, switching the display mode of the displayed image, and indicating the recording or reproduction of dynamic or static images. The multiple operation components 6a can take various forms, such as buttons, slide switches, or rotary dials.

[0128] As described above, connector 6b is a connecting component that connects the operation part 6 to the insertion part 5 by connecting to connector 5b of the insertion part 5.

[0129] The universal cable 7 is a long, thin cable extending from the base of the operating unit 6. Various signal cables, optical fibers, etc., are inserted inside the universal cable 7, and a connector 7a is provided at its end. This connector 7a connects to the connector section (not shown) of the main unit 3. Thus, the universal cable 7 electrically connects the operating unit 6 and the main unit 3.

[0130] The main unit 3 contains a central processing unit (CPU), ROM, RAM, control unit, image processing unit, light source, large-capacity storage device, and display device. A connector 7a for a universal cable 7 is connected to the main unit 3.

[0131] The display device included in the main unit 3 displays not only images based on image data, but also various information generated in the control unit, etc. The image data is acquired by an imaging element (not shown) provided at the front end of the insertion part 5 of the endoscope 2.

[0132] In addition to being housed in the main unit 3, the light source can also be configured to be located inside the operation unit 6. In this configuration, the optical guide inside the universal cable 7 can be omitted.

[0133] The endoscope 2 and main body 3 thus constructed have a structure that is basically the same as that of conventionally known endoscopes, and descriptions and illustrations of structures other than those described above are omitted.

[0134] Next, the structure of the insertion guide device 4 according to one embodiment of the present invention will be described.

[0135] like Figure 2 , Figure 3 As shown, the insertion guide device 4 of this embodiment includes, for example, a flat plate component 4a and a cylindrical component 4b, which are made of resins with good sliding properties such as acrylic, PEEK (polyether ether ketone), Teflon (registered trademark), and metal plates such as stainless steel.

[0136] The flat plate component 4a is formed by a flat plate that extends along the long axis and is flattened and formed into a strip. The cross section of the flat plate component 4a perpendicular to the long axis is formed by a rectangular shape (a quadrilateral with all right angles), which is formed by a width W perpendicular to the long axis and a thickness T perpendicular to both the long axis and the width W.

[0137] Here, the thickness T in the cross-section of the flat plate member 4a is made smaller than the width W (W > T). Therefore, with this structure, the flat plate member 4a has a shape that is flexible in the thickness T direction and has little or no flexibility in the width W direction.

[0138] Furthermore, the flat plate member 4a has a curved portion 4c that bends in one direction toward the thickness T and protrudes obliquely forward from the front end.

[0139] The cylindrical member 4b is a retaining member that holds the front end of the insertion part 5 to the side portion in the width W direction of the flat member 4a. The cylindrical member 4b has a through hole 4ba through which the insertion part 5 passes and a locking part 4bb that fixes the insertion part 5 when it is inserted into the through hole 4ba. The cylindrical member 4b is generally formed in a short cylindrical shape. Furthermore, the cylindrical member 4b is positioned on the side portion of the flat member 4a near the front end, closer to the base end than the bent part 4c.

[0140] In addition, such as Figure 2 As shown, the cylindrical component 4b has a width W1. Therefore, the width dimension of the insertion guide device 4 itself is W+W1. Thus, for the subject to be observed and examined using the insertion guide device 4, a subject having an insertion opening with a width dimension at least larger than the width W+W1 is considered the subject.

[0141] Detailed illustrations of the locking part 4bb are omitted, but a known fixing unit employing a pawl stop mechanism or a latching mechanism can be used, for example. Therefore, the cylindrical part 4b is constructed, for example, from a resilient resin component.

[0142] In this case, a reliable and firm fixation force is not required; a slightly weak fixation force is sufficient. For example, when inserting the insertion guide 4, on which the insertion part 5 of the endoscope 2 is mounted, into the body being examined, a fixation force sufficient to continuously ensure the fixation of the insertion part 5 relative to the cylindrical member 4b is sufficient.

[0143] The reason is as follows. After the insertion part 5 of the endoscope 2 is guided to the desired observation site inside the subject using the insertion guide 4, it further advances forward of the curved part 4c for observation and inspection. At this time, the insertion part 5 needs to be able to move freely in and out while inserted through the through hole 4ba. Therefore, the fixing force of the locking part 4bb on the insertion part 5 is set to such a level that even when inside the subject, the fixing state of the locking part 4bb on the insertion part 5 can be released as needed by performing the forward and backward movement of the insertion part 5.

[0144] Furthermore, the cylindrical component 4b can also be configured to, in addition to the insertion part 5, also have the function of inserting and locking the processing instrument or the like (see reference). Figure 3 ).

[0145] In the above description, the cylindrical component 4b is a portion of the front end of the flat component 4a, but it can also be a flexible tubular component extending to the base end of the flat component 4a. The tubular component is made of polyurethane, Teflon (registered trademark), nylon, Hytrel, etc. An endoscope 2 is inserted into it and pushed out from the base end. The endoscope 2 is pushed out from the front end of the tubular component and can be delivered deep into the subject.

[0146] Next, the function of the endoscope system 1, which includes an insertion guide device 4 constructed in this way, when observing and examining the internal space of the subject will be explained.

[0147] Here, as a construction of the subject when using the insertion guide device 4 of this embodiment, for example, the following construction is envisioned: the insertion port communicating with the internal space of the subject has a cross-sectional area that allows the insertion guide device 4 to be inserted, and the internal space extending forward from the insertion port has an expansion in the width direction and a narrow space in the thickness direction.

[0148] Specifically, for example, imagine as Figure 4 , Figure 5 The structure of the specimen shown. Figure 4 , Figure 5 This is a schematic diagram illustrating an example of the structure of a subject being examined using an endoscopic system incorporating the insertion guide device of this embodiment. Wherein, Figure 4 This is a schematic diagram showing a side cross-section of the internal structure of the subject being examined. Figure 5 From Figure 4 The diagram showing the direction of the arrow [5] (view of the insertion port from the front) also schematically illustrates the expansion of the internal space of the subject.

[0149] exist Figure 4 , Figure 5 In the specimen 100 shown, the insertion port 101 is composed of an elliptical or rectangular shape with a width Wx and a thickness Tx (the example shown is an elliptical shape). Here, the width Wa of the insertion guide device 4 is the width W of the flat plate member 4a plus the width W1 of the cylindrical member 4b. Therefore, the width Wx of the insertion port 101 is larger than the width W+W1 of the flat plate member 4a itself (Wx>W+W1).

[0150] Furthermore, the internal space extending forward from the insertion port 101 has a structure that expands in the width direction but has a narrow space in the thickness direction. And, in Figure 4 , Figure 5 The specimen 100 shown is configured to have a space extending in the vertical direction (Y-axis direction) after moving forward (towards the Z-axis) from the insertion port 101.

[0151] In the case of a specimen 100 with such a structure, it is difficult to move the endoscope 2 in a single-piece configuration in the vertical direction (Y-axis direction), especially in the upward direction (marked as Y1 direction). For example, when changing direction in the Y1 direction from where the front end touches the wall and standing upright to insert it inside, if it is wide in the width direction or is a large-diameter tube, even if it wants to move upward, the endoscope 2 will tilt laterally to the left and right relative to the direction of travel (upward) due to its own weight, and thus have to move at an angle, and cannot stand upright.

[0152] Even with such an internal structure, the subject 100 can be easily observed and inspected using the insertion guide device 4 of this embodiment. Specific examples of subjects with this structure include gaps in building walls and pillars for large-diameter outdoor streetlights.

[0153] The function of the endoscope system 1, which includes the insertion guide device 4 of this embodiment, when observing and examining the internal space of the subject is roughly as follows. Figure 6 , Figure 7 This is a schematic diagram illustrating the function of an endoscope system including the insertion guide device of this embodiment. Wherein, Figure 6 This indicates the state where the front end of the insertion guide device is in contact with the vertical wall after it has been inserted into the internal space of the subject. Figure 7 Indicates in Figure 6 After the initial state, the direction of travel changes when the front end of the insertion guide device faces upwards.

[0154] First, the front end of the insertion part 5 is inserted into the through hole 4ba of the cylindrical component 4b of the insertion guide device 4, and the front end of the insertion part 5 is fixed by the locking part 4bb. Thus, the insertion guide device 4 becomes... Figure 2 , Figure 3 The state shown.

[0155] The front end of the insertion guide 4 is inserted into the internal space through the insertion port 101 of the subject 100, and the insertion guide 4 is then inserted into the internal space. Figure 4 Push it in the direction indicated by arrow F. The situation at this point is... Figure 4 The state shown.

[0156] So, soon, as Figure 6 As shown, the front end of the insertion guide 4 (the front end of the curved portion 4c) abuts against the vertical wall 102 of the internal space of the subject 100. From this state, the insertion guide 4 is further moved in the direction of arrow F. Thus, as... Figure 7 As shown, the front end of the insertion guide device 4 changes its forward path along the vertical wall 102 in the upward direction (arrow Y1 direction) (refer to...). Figure 7 (The marked [A] position). At this time, the travel direction of the front end of the insertion guide 4 corresponds to the bending direction of the curved part 4c. Therefore, if the desired observation location in the internal space is known in advance, it is preferable to pre-set the bending direction of the curved part 4c when inserting the insertion guide 4 into the subject.

[0157] Here, when the insertion guide 4 is further advanced in the direction of arrow F, the insertion guide 4 is flexible in the thickness direction and is pressed against the wall surface due to its elasticity. On the other hand, it has little or no flexibility in the width direction, so it does not tilt in the width direction. As a result, the front end of the insertion guide 4 advances along the vertical wall surface 102 (see reference). Figure 7 The location of the marker [B]).

[0158] In this way, the insertion guide 4 guides the tip of the insertion part 5 to the desired location inside the subject's body. Furthermore, when the insertion part 5 reaches the desired location, while maintaining the insertion guide 4 inside the subject's body, the insertion part 5 of the endoscope 2 is pushed out in the insertion direction. Thus, as... Figure 7 As shown, the front end of the insertion part 5 can advance forward beyond the curved part 4c at the front end of the insertion guide device 4 (see reference). Figure 7 [B] When the endoscope 2 is used with the endoscope protruding from the front end of the cylindrical component 4b, since the cylindrical component 4b is located on the base side, when the flat component 4a comes into contact with the subject and changes direction, the endoscope 2 avoids the force of direct contact with the subject, thus reducing the likelihood of malfunction. When the endoscope 2 is used with the front end of the cylindrical component 4b in the same position, the cylindrical component 4b is located on the base side, so the flat component 4a comes into contact with the subject first, and the front end of the endoscope 2 does not come into direct contact, thus reducing the likelihood of force and malfunction.

[0159] In this state, for example, by operating the bending lever 9 of the operation unit 6, the bending portion of the insertion part 5 can be bent, thereby changing the observation and inspection direction, and thus enabling the observation and inspection of desired parts such as the wall surface condition. Furthermore, by pressing one of the multiple operation parts 6a of the operation unit 6 that corresponds to the desired function, an image of the observed and inspected part can be displayed in a predetermined form (such as a static image or a dynamic image) on the display screen of the main unit 3, or image data can be recorded or reproduced.

[0160] In addition, if a tubular component extending from the front end to the base end is used instead of the cylindrical component 4b, the endoscope 2 can be further pushed out from the tubular component and inserted into a narrower part inside (not shown).

[0161] Thus, after the desired observation and inspection are completed, the insertion part 5 is first pulled out, leaving the front end of the insertion part 5 fixed to the cylindrical component 4b. In this state, the insertion guide device 4 is moved in the pulling direction (opposite to arrow F). During this process, the insertion guide device 4 moves smoothly along the wall within the internal space of the object being examined. Therefore, the insertion guide device 4 can be pulled out smoothly and easily.

[0162] in addition, Figure 1 The shape of the endoscope system 1 shown is only an example.

[0163] Therefore, the internal structure of the subject suitable for observation and inspection using the insertion guide device 4 of this embodiment is not limited to the structure shown in the example above. For example, it is also effective for the following subjects. Specifically, for example, a structure in which the internal space forward of the insertion port is obliquely formed in the left-right width direction (X-axis direction), or a complex structure in which the insertion path in the internal space changes multiple times or repeatedly in the up-down direction (Y-axis direction) or the left-right width direction (X-axis direction). Examples of subjects with such complex structures include various internal combustion engines.

[0164] As described above, according to the above embodiment, the insertion guide device 4 is used for an endoscope 2 having an insertion part 5 to guide the insertion of the insertion part 5 into the subject 100. The insertion part 5 extends along the long axis and has a front end and a base end.

[0165] The insertion guide device 4 includes: a flat plate member 4a extending along its long axis, having a width W perpendicular to the long axis and a thickness T perpendicular to both the long axis and the width W, wherein the thickness T is less than the width W; and a cylindrical member 4b that mounts the front end of the insertion part 5 to the side of the flat plate member 4a in the width W direction. Here, the flat plate member 4a has a curved portion 4c at its front end that bends in the thickness T direction. Furthermore, the cylindrical member 4b is cylindrical in shape, having a through hole 4ba through which the insertion part 5 passes, and a locking portion 4bb that fixes the front end of the insertion part 5 in a state of being inserted into the through hole 4ba. The cylindrical member 4b is positioned closer to the base end than the curved portion 4c.

[0166] The insertion guide device 4, constructed in this way, is suitable for observing and examining a subject with an internal space having the following structure: in the subject 100, the internal space extending forward from the insertion port 101 has an expansion in the width W direction and a narrow space in the thickness T direction, and after advancing forward from the insertion port 101 (along the Z-axis direction), it has a space extending in the vertical direction (Y-axis direction).

[0167] That is, when conducting an internal inspection of a subject with such an internal space, after the insertion guide device 4 is inserted into the insertion port 101, even if the internal space expands in the width direction, the insertion part 5 mounted on the flat plate member 4a will not swing in the left or right width direction, but can move straight.

[0168] Furthermore, in a configuration where a vertical wall 102 exists after moving straight through the internal space from the insertion port 101, and a space extends along the vertical wall 102 in the vertical direction (Y-axis direction), after the front end of the insertion guide 4 abuts against the vertical wall 102, only a further pressing force in the straight direction is applied, and the direction of travel of the insertion guide 4 can be smoothly changed.

[0169] This is because, since a curved portion 4c is provided at the front end of the flat plate member 4a, the front end of the curved portion 4c can move smoothly along the inner wall even in the tortuous parts of the internal space. Therefore, by providing the curved portion 4c, the insertion capability at the tortuous parts of the internal space can be improved.

[0170] The flat plate member 4a is formed such that its thickness T is smaller than its width W (W > T), and the front end of the insertion part 5 is mounted on the cylindrical member 4b provided on the side of the flat plate member 4a. Therefore, it can be a structure in which the flat plate member 4a can be easily bent in the thickness T direction.

[0171] Therefore, by using the insertion guide device 4 of this embodiment, the insertion and removal of the insertion part 5 can always be performed smoothly and easily. Furthermore, according to the insertion guide device 4, the tip of the insertion part 5 can be easily and reliably guided to the desired location inside the subject. Therefore, reliable observation and inspection can always be performed. In addition, smooth operation can be ensured when removing the insertion part 5.

[0172] In the insertion guide device 4 of the above-described embodiment, an example is shown that it is constructed using a flat plate member 4a, but the present invention is not limited to such a structural example. As a structural example of the insertion guide device according to an embodiment of the present invention, it can be configured into various modified forms as shown below.

[0173] Furthermore, the various modifications described below have essentially the same structure as the embodiment described above, or have structures that are substantially the same as each other among the modifications. Therefore, in the description of the various modifications shown below, the same reference numerals are used for the same components as in the embodiment described above, and detailed descriptions of these components are omitted; only the different structures are described in detail below.

[0174] [First Variation]

[0175] Figures 8-10 This is a diagram illustrating a first modified example of an insertion guide device according to an embodiment of the present invention.

[0176] in, Figure 8 This is an enlarged perspective view of a portion of the front end region of the insertion guide device in the first modified example. Figure 9 yes Figure 8 The insertion guide device is from the front ( Figure 8 The plan view is observed in the direction indicated by the arrow [9]. Additionally, Figure 10 It means Figure 8 A diagram illustrating the function of the insertion guide device.

[0177] like Figure 8 , Figure 9 As shown, the difference in the insertion guide device 4A of the first modified example is that it is configured to have two flat plate-shaped components (4a1, 4a2).

[0178] The insertion guide device 4A of the first modified example includes a first flat plate member 4a1, a second flat plate member 4a2, and a cylindrical member 4b. The first flat plate member 4a1 has a structure substantially the same as that of the flat plate member 4a in the first embodiment described above, and has a curved portion 4c at its front end. The second flat plate member 4a2 is a simple flat plate formed by removing the curved portion 4c from the first flat plate member 4a1.

[0179] Furthermore, the first flat plate member 4a1 and the second flat plate member 4a2 are formed to be stacked in the thickness direction. Moreover, the two flat plate members (4a1, 4a2) are bound together at the front end region using a fastener 4d to maintain this stacked state. In this case, the first flat plate member 4a1 is configured relative to the second flat plate member 4a2 along the thickness direction. Figure 8 It can slide freely in the direction of arrow S.

[0180] With this structure, the insertion guide device 4A of the first variation has a width W and a thickness Tx2 = 2T, with the thickness 2T being smaller than the width W (W > 2T). Here, the thickness T of each plate-shaped component (4a1, 4a2) can also be set to be smaller than the thickness T of the flat plate-shaped component 4a in the first embodiment described above. Thus, even when multiple flat plate-shaped components are stacked, the overall thickness can be suppressed. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0181] The function of the insertion guide device 4A in this first modified example is substantially the same as that in the embodiment described above. Furthermore, in the first modified example, when in a position... Figure 8 In the first state shown, when the first flat plate member 4a1 is moved towards... Figure 10 When the arrow S1 slides in the direction of the arrow and moves a specified amount, it can be moved to... Figure 10 The second state is shown.

[0182] As explained above, the insertion guide device 4A according to the first modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the first modification, when shifted to the second state, the front end region can become a more flexible structure compared to the first state.

[0183] Furthermore, in the first modified example, in the second state, the flexibility of the front end region can be adjusted by adjusting the sliding amount of the first flat plate member 4a1.

[0184] In the first variation described above, an example using two flat plate components (4a1, 4a2) is shown, but for example, a structure consisting of three or more flat plate components stacked together could also be provided. In such a structure, the thickness T is always set to be smaller than the width W.

[0185] [Second variation]

[0186] Figures 11-14 This is a diagram showing a second variation of the insertion guide device according to an embodiment of the present invention.

[0187] in, Figure 11 This is an enlarged perspective view of a portion of the front end region of the insertion guide device in the second variation. Figure 12 yes Figure 11 The insertion guide device is from the front ( Figure 11 The plan view is observed in the direction indicated by the arrow

[12] . Figure 13 yes Figure 11 The insertion guide device is located on the side ( Figure 11 The plan view observed (in the direction indicated by the arrow

[13] ). Additionally, Figure 14 It means Figure 11 A diagram illustrating the function of the insertion guide device.

[0188] like Figure 11 As shown, the difference in the second modified example of the insertion guide device 4B is that it is configured to have three flat plate-shaped components (4a1, 4a2, 4a3).

[0189] The insertion guide device 4B of the second modification includes a first flat plate member 4a1, a second flat plate member 4a2, a third flat plate member 4a3, and a cylindrical member 4b.

[0190] The first flat plate component 4a1 and the third flat plate component 4a3 are constructed with a structure that is substantially the same as that of the first flat plate component 4a1 in the first modified example described above, and each has a first curved portion 4c1 and a second curved portion 4c2 at its respective front end.

[0191] Furthermore, the second flat plate member 4a2 is constructed with a structure substantially the same as that of the second flat plate member 4a2 in the first modified example described above, and is a simple flat plate without a curved portion at the front end.

[0192] Furthermore, the first flat plate member 4a1, the second flat plate member 4a2, and the third flat plate member 4a3 are formed in a stacked configuration in the thickness direction. In this case, the second flat plate member 4a2 is configured to be sandwiched between the first flat plate member 4a1 and the third flat plate member 4a3. At this time, the first bent portion 4c1 of the first flat plate member 4a1 and the second bent portion 4c2 of the third flat plate member 4a3 are both configured to be bent toward one side of the second flat plate member 4a2.

[0193] The three flat plate components (4a1, 4a2, 4a3) are bundled together at the front end using a fastener 4d to maintain the stacked state. In this configuration, the first flat plate component 4a1 and the third flat plate component 4a3 are positioned relative to the second flat plate component 4a2 along... Figure 11 , Figure 13 It can slide freely in the direction of arrow S.

[0194] With this structure, the insertion guide device 4B of the second modification has a width W and a thickness Tx3 = 3T, with the thickness 3T being smaller than the width W (W > 3T). The other structures are substantially the same as those of the insertion guide device 4A of the first modification described above.

[0195] Furthermore, regarding the insertion guide device 4B of this second modified example, when it is in the position Figure 11 , Figure 13 In the first state shown, when the first flat plate member 4a1 or the third flat plate member 4a3 is directed towards... Figure 14 When the arrow S1 in the diagram slides and moves a specified amount, it can be shifted to... Figure 14 The second state is shown. Furthermore... Figure 14 The state shown represents the second state when the first plate-shaped member 4a1 is displaced. Although the illustration is omitted, the state when the third plate-shaped member 4a3 is displaced is roughly the same.

[0196] The insertion guide device 4B in this second variant has a function that is roughly the same as that in the first variant described above.

[0197] In addition, in the second modified example, when the insertion guide device 4B is inserted into the subject, it is first set to... Figure 11 , Figure 13 The first state is shown. In this state, for example, the front end of the insertion guide 4B abuts against the vertical wall. In this case, the first flat plate member 4a1 is directed towards... Figure 14The insertion guide 4B slides in the direction of arrow S1. As a result, the insertion guide 4B moves to the second state. At this time, the insertion guide 4B changes its direction of travel to the bending direction of the curved portion 4c1 of the first flat member 4a1.

[0198] Similarly, the third flat plate component 4a3 is directed towards Figure 14 The arrow S1 slides in the direction of the arrow. Thus, the insertion guide device 4B, which has shifted to the second state, changes its direction of travel to the bending direction of the curved portion 4c2 of the third flat plate member 4a3.

[0199] As explained above, the insertion guide device 4B of the second modification can achieve approximately the same effect as the first modification described above. Moreover, according to the second modification, when there is, for example, a vertically branching insertion path in the internal space of the subject, the direction of travel can be selected by sliding either the first flat plate member 4a1 or the third flat plate member 4a3 when shifting to the second state.

[0200] [Third variation]

[0201] Figure 15 , Figure 16 This is a diagram illustrating a third variation of an insertion guide device according to an embodiment of the present invention.

[0202] in, Figure 15 This is an enlarged perspective view of the main part of a portion of the front end region of the insertion guide device in the third variation. Figure 16 yes Figure 15 The insertion guide device is from the front ( Figure 15 The plan view is observed in the direction indicated by the arrow

[16] .

[0203] like Figure 15 , Figure 16 As shown, the insertion guide device 4C of the third modification is substantially the same as the first modification described above, and is configured to have two flat plate-shaped components (4a1, 4a2). The difference is that a flexible printed circuit board 4e is disposed between the two flat plate-shaped components (4a1, 4a2).

[0204] The insertion guide device 4C in the third modification includes a first flat plate component 4a1, a second flat plate component 4a2, a cylindrical component 4b, and a flexible printed circuit board 4e. The first flat plate component 4a1 and the second flat plate component 4a2 are substantially the same as the two flat plate components (4a1, 4a2) in the first modification described above.

[0205] Furthermore, in the third variation, the configuration is such that the first flat plate member 4a1 and the second flat plate member 4a2 are arranged differently. This configuration is to avoid interference between the bent portion 4c and the electrical component 4f (described later) disposed at the front end of the insertion guide device 4C.

[0206] The first flat plate member 4a1 and the second flat plate member 4a2 are formed in a stacked configuration in the thickness direction and are secured together at the front end region using a fastener 4d. In this case, the first flat plate member 4a1 is positioned relative to the second flat plate member 4a2 along the thickness direction. Figure 15 It can slide freely in the direction of arrow S.

[0207] Furthermore, a flexible printed circuit board 4e is sandwiched between the first flat plate member 4a1 and the second flat plate member 4a2. An electrode (not shown) extends from the front end of the flexible printed circuit board 4e, and an electrical component 4f, such as a temperature sensor or a pressure sensor, is connected to the electrode. The electrical component 4f is exposed on the front end side of the insertion guide device 4C. Other structures are substantially the same as those of the insertion guide device 4B in the first modified example described above.

[0208] The insertion guide device 4C in this third variation has a function that is roughly the same as that in the first variation described above.

[0209] As explained above, the insertion guide device 4C according to the third modification can achieve approximately the same effect as the first modification described above. Furthermore, according to the third modification, the electrical component 4f at the front end of the insertion guide device 4C can be equipped with a temperature sensor or a pressure sensor, etc., so that the internal environmental conditions of the test object (temperature, etc.) or the contact pressure when the front end of the insertion guide device 4C contacts a wall surface, etc., can be detected.

[0210] Furthermore, sensors will subsequently connect to the flexible printed circuit board 4e to measure physical quantities of the internal environment. By using this front end as a connector, sensor replacement can be easily performed. Additionally, sensors can be assembled within the flexible printed circuit board 4e as a single unit. Not limited to the flexible printed circuit board 4e, the sensor itself can also be inserted to determine the shape of the insertion guide device 4C.

[0211] Furthermore, in the third variation described above, similar to the first variation, a structural example using two flat plate components (4a1, 4a2) is shown, but the structure is not limited to this. For example, a structural example using three or more flat plate components stacked together could also be provided. In such a structure, the thickness T is always set to be smaller than the width W.

[0212] [Fourth variation]

[0213] Figure 17The fourth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0214] like Figure 17 As shown, the fourth modification of the insertion guide device 4D differs from the above modifications in the mutual arrangement of the three flat plate components (4a1, 4a2, 4a3).

[0215] The fourth variation of the insertion guide device 4D includes a first flat plate member 4a1, a second flat plate member 4a2, a third flat plate member 4a3, and a cylindrical member 4b.

[0216] The first flat plate component 4a1 is constructed with a structure substantially the same as that of the first flat plate component 4a1 in the first modified example described above, and has a first curved portion 4c1 at the front end.

[0217] Furthermore, the second flat plate member 4a2 and the third flat plate member 4a3 are constructed with a structure that is substantially the same as that of the second flat plate member 4a2 in the first modified example described above, and are simple flat plates without a curved portion at the front end.

[0218] Furthermore, the first flat plate member 4a1, the second flat plate member 4a2, and the third flat plate member 4a3 are stacked in the thickness direction. In this case, the ends of the three flat plate members (4a1, 4a2, 4a3) are staggered by a predetermined distance in the long axis direction. Here, regarding the three flat plate members (4a1, 4a2, 4a3), the end of the first flat plate member 4a1 is positioned at the position that protrudes most towards the front end, then the ends of the second flat plate member 4a2 are arranged at a predetermined interval near the base end, and then the ends of the third flat plate member 4a3 are arranged at a predetermined interval near the base end.

[0219] In this case, the three flat components (4a1, 4a2, 4a3) are fixed to each other in a manner that maintains a predetermined positional relationship.

[0220] The cylindrical member 4b is disposed on the side of the first flat member 4a1 in the width direction at a position closer to the base end than the bent portion 4c. The other structures are substantially the same as those of the insertion guide device 4A in the second modified example described above.

[0221] As explained above, the insertion guide device 4D according to the fourth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the fourth modification, since there are fewer plate-like members stacked closer to the front end, flexibility can be further ensured. Therefore, insertion at curved portions within the internal space of the test subject can be improved.

[0222] Furthermore, in the fourth variation described above, the three flat plate components (4a1, 4a2, 4a3) are fixed in place, but this structure is not limited to that example. For instance, it could be a structure like the second and third variations, where a fixing device 4d is used to ensure that the multiple flat plate components can slide along their long axis.

[0223] [Fifth Variation]

[0224] Figure 18 The fifth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0225] like Figure 18 As shown, the insertion guide device 4E of the fifth modification is composed of a structure that is substantially the same as that of the fourth modification described above, but the shapes of the three flat plate components (4Ea1, 4Ea2, 4a3) are different.

[0226] The fifth variation of the insertion guide device 4E includes a first flat plate component 4Ea1, a second flat plate component 4Ea2, a third flat plate component 4a3, and a cylindrical component 4b.

[0227] The first flat plate member 4Ea1 and the second flat plate member 4Ea2 are formed into a wedge shape, narrowing in width towards the front end. Furthermore, the first flat plate member 4Ea1 has a first curved portion 4c at its front end. The second flat plate member 4Ea2 is composed of a simple flat plate without a curved portion at its front end.

[0228] The cylindrical component 4b is disposed on the width-direction side of the front end portion of the three flat components (4Ea1, 4Ea2, 4a3) that are stacked together. Other structures are substantially the same as those of the insertion guide device 4D in the fourth modified example described above.

[0229] As explained above, the insertion guide device 4E according to the fifth modification can achieve approximately the same effect as the fourth modification described above. Furthermore, according to the fifth modification, the front ends of the first flat plate member 4Ea1 and the second flat plate member 4Ea2 are formed into a wedge shape, thus further ensuring flexibility compared to the fourth modification. Therefore, this contributes to further improving the insertability of the endoscope insertion section into the patient's body.

[0230] Furthermore, in the fifth variation described above, the three flat plate components are not limited to a fixed form; they can also be configured such that multiple flat plate components can be slid along their long axis using a fixture 4d.

[0231] Furthermore, in the fifth variation, a structure consisting of three flat plate-shaped components is shown, but the design is not limited to this form. For example, in a structure substantially the same as the first variation described above, consisting of a single flat plate-shaped component, the front end of the flat plate-shaped component can also be formed into a wedge shape.

[0232] [Sixth Variation]

[0233] Figure 19 The sixth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0234] like Figure 19 As shown, the insertion guide device 4F of the sixth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the difference is that it has a plurality of slits 4g1 on the plane of the flat plate member 4Fa.

[0235] The insertion guide device 4F of the sixth modification includes a flat plate member 4Fa and a cylindrical member 4b. The flat plate member 4Fa has a curved portion 4c and multiple slits 4g1.

[0236] Multiple slits 4g1 extend in the width direction on the plane of the flat member 4Fa and are arranged at predetermined intervals along the long axis within a predetermined area on the front end side. Furthermore, these multiple slits 4g1 are formed with a predetermined angle of inclination relative to the long axis direction. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0237] The function of the insertion guide device 4F in this sixth modified example is roughly as follows. For example, suppose that an application from... Figure 19 The pressure applied is indicated by arrow F. This envisions the insertion of the guide device 4F when its tip contacts the vertical wall of the patient's body during the insertion process.

[0238] Thus, when a pressing force in the direction of arrow F is applied to the front end of the curved portion 4c, the insertion guide 4F bends, for example, in the direction of arrow R. Furthermore, through the multiple obliquely formed slits 4g1, the insertion guide 4F... Figure 19 The arrow R in the image is bent at an angle.

[0239] The sixth modified example of the insertion guide device 4F, which achieves such an effect, is suitable for observation and inspection of a structure formed obliquely in the left-right width direction (X-axis direction) relative to the direction of travel within the internal space of the subject.

[0240] As explained above, the insertion guide device 4F according to the sixth modification can achieve substantially the same effect as the first embodiment described above. Furthermore, according to the sixth modification, insertion can be performed more efficiently for specific structures within the internal space of the subject, such as structures formed obliquely in the left-right width direction (X-axis direction) relative to the direction of travel.

[0241] [Seventh Variation]

[0242] Figure 20 The seventh variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0243] like Figure 20 As shown, the insertion guide device 4G of the seventh modification is constructed with a structure that is substantially the same as that of the sixth modification described above, but the shape of the multiple slits provided on the plane of the flat plate component is different.

[0244] The seventh modification of the insertion guide device 4G includes a flat plate member 4Ga and a cylindrical member 4b. The flat plate member 4Ga has a curved portion 4c and multiple slits 4g2.

[0245] Multiple slits 4g2 are arranged along the long axis at predetermined intervals within a predetermined area on the front end side of the flat plate member 4a.

[0246] Here, within the area where these multiple gaps 4g2 are formed, for example, the area within a defined range on the front end side is designated as the first region D1, and the area within a defined range on the base end side that is closer to the first region D1 is designated as the second region D2 (see reference). Figure 20 ).

[0247] In this case, the arrangement interval of the plurality of slits 4g2 formed in the first region D1 is set to be narrower than the arrangement interval of the plurality of slits 4g2 formed in the second region D2. Other structures are substantially the same as those of the insertion guide device 4F in the sixth variation described above.

[0248] As explained above, the insertion guide device 4G according to the seventh modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the seventh modification, a structure that is easier to bend towards the front end can be realized, thereby contributing to improved insertion performance.

[0249] [Eighth Variation]

[0250] Figure 21 The eighth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0251] like Figure 21 As shown, the insertion guide device 4H of the eighth modification is constructed with a structure that is substantially the same as that of the seventh modification described above, but the shape of the multiple slits provided on the plane of the flat plate component is different.

[0252] The insertion guide device 4H in the eighth modification includes a flat plate member 4Ha and a cylindrical member 4b. The flat plate member 4Ha has a curved portion 4c and multiple slits 4g3.

[0253] Multiple slits 4g3 are arranged along the long axis at predetermined intervals within a predetermined area on the front end side of the flat plate component 4Ha.

[0254] Furthermore, in the eighth modification, the multiple slits 4g3 are configured such that their width gradually narrows from the front end side to the base end side. Other structures are substantially the same as the insertion guide device 4F in the sixth modification described above.

[0255] As explained above, the insertion guide device 4H according to the eighth modification can achieve approximately the same effect as the seventh modification described above. Furthermore, according to the eighth modification, compared to the seventh modification described above, it can bend smoothly from the tip to the base. Therefore, it can help to further improve insertion performance.

[0256] [Ninth Variation]

[0257] Figure 22 The ninth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0258] like Figure 22 As shown, the insertion guide device 4I of the ninth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the shape of the flat plate component is different.

[0259] The insertion guide device 4I of the ninth modification includes a flat plate member 4Ia and a cylindrical member 4b. The flat plate member 4Ia has a curved portion 4c and a constricted neck 4h.

[0260] The neck 4h is formed in a defined region near the front end of the flat plate member 4Ia. The neck 4h is formed by cutting off a portion of the region on both sides in the width direction of the flat plate member 4Ia. Here, the width W of the flat plate member 4Ia is a narrow region (width W3) at the neck 4h (W>W3).

[0261] According to this structure, in the insertion guide device 4I, for example, when a specified force or more is applied to the front end in a specified direction, the flat plate member 4Ia becomes easily generated at the constricted neck 4h. Figure 22 The twisted structure is shown by the arrow Tw in the image.

[0262] Here, the so-called prescribed direction, in addition to the force along the long axis of the flat plate member 4Ia, also envisions the direction of rotation about that long axis. Other structures are substantially the same as the insertion guide device 4 of the above-described embodiment.

[0263] The function of the insertion guide device 4I in this ninth modified example is roughly as follows. For example, suppose that an application is made to the front end of the curved portion 4c... Figure 22 The arrow F indicates the pressing force. Here, arrow F is along the long axis of the flat plate member 4Ia. This envisions the situation where the tip of the insertion guide 4I abuts against the vertical wall inside the subject body during the insertion operation.

[0264] Thus, when a pressing force in the direction of arrow F is applied to the front end of the curved portion 4c, the insertion guide device 4I begins to bend in the bending direction of the curved portion 4c.

[0265] Here, consider the following situation: the wall surface abutted by the front end of the insertion guide 4I is, for example, formed into a curved shape, becoming a so-called torsional structure where the insertion path bends in a right-angle direction and then further bends in different directions. Moreover, the insertion path maintains a narrow dimension in the thickness direction at this time. Furthermore, as a specific example of such an internal structure in the tested object, there is an exhaust pipe installed in a building, etc.

[0266] During internal observation of such a subject, when the insertion guide 4I is pressed at its tip in the direction of arrow F, the tip of the curved portion 4c attempts to travel along the curved surface of the wall. However, in areas where the insertion path is twisted, the insertion guide 4I is highly likely to pass through.

[0267] Therefore, in the insertion guide device 4I of the ninth modification, by providing a necking 4h, the flat member 4Ia becomes a structure that is easily twisted at a predetermined location. Thus, under the internal condition of the aforementioned torsional structure, the flat member 4Ia of the insertion guide device 4I of the ninth modification can be easily twisted at the necking 4h. Therefore, even with a specific insertion path having such a structure, the insertion guide device 4I of the ninth modification can ensure smooth insertion and efficient insertion.

[0268] As explained above, the insertion guide device 4I according to the ninth modification can achieve roughly the same effect as the first embodiment described above. Furthermore, according to the ninth modification, it is possible to effectively handle specific structures (such as insertion paths whose bending direction changes with the shape of the curved wall) within the internal space of the test subject.

[0269] [Tenth Variation]

[0270] Figure 23 The tenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0271] like Figure 23 As shown, the insertion guide device 4J of the tenth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the difference is that it has a plurality of elongated slots 4j1 serving as retaining members on the plane of the flat plate member 4Ja.

[0272] The insertion guide device 4J in the tenth modification includes a flat plate member 4Ja and a cylindrical member 4b. The flat plate member 4Ja has a curved portion 4c and multiple elongated slots 4j1.

[0273] Multiple elongated slots 4j1 are formed along the long axis on the plane of the flat plate member 4Ja. Each elongated slot 4j1 has a slot opening 4jb on the plane facing the flat plate member 4Ja. The multiple elongated slots 4j1 are arranged at predetermined intervals in the width direction of the flat plate member 4Ja. The slot width W4 of each elongated slot 4j1 is, for example, set to a size that allows for the placement of various handling devices, etc. Thus, handling devices, etc., 8 can be easily placed into the interior of the elongated slot 4j1 from the slot opening 4jb.

[0274] Furthermore, after the treatment apparatus 8 is placed in the elongated groove 4j1, a membrane-like member 9 is provided on the surface of the flat portion of the plate-shaped member 4Ja to cover the groove opening 4jb of the elongated groove 4j1. As a result, the membrane-like member 9 prevents the treatment apparatus 8 placed in each elongated groove 4j1 from falling off the groove opening 4jb.

[0275] With this structure, in the insertion guide device 4J, the treatment instruments, etc., disposed in each of the elongated slots 4j1 are configured to prevent them from falling out of the slot openings 4jb, and can move freely in and out along the long axis. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0276] As explained above, the insertion guide device 4J according to the tenth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the tenth modification, in addition to the endoscope insertion portion 5, the treatment instrument 8 can also be reliably held. Therefore, the insertion portion 5 and the treatment instrument 8 can be reliably and efficiently guided to the desired location inside the patient's body.

[0277] Furthermore, the long groove 4j1 is formed along the long axis of the flat plate member 4Ja, so it can be positioned over a longer range from the front end to near the base of the endpiece for endoscopes or other instruments with a slender tube shape, and can be held more reliably.

[0278] Furthermore, in the tenth modified example, an example is shown that is constructed by setting three long slots 4j1, but it is not limited to this structural example. The number of long slots 4j1 can be set selectively and appropriately.

[0279] Furthermore, similar to the first embodiment and its variations described above, the tenth variation involves fixing the front end of the insertion portion 5 with a cylindrical member 4b, but this configuration is not limited to that structure. For example, it is also possible to configure the endoscope insertion portion 5 using the long slot 4j1 by appropriately adjusting the width W4 of the long slot 4j1. With such a structure, the cylindrical member 4b can be omitted. This contributes to the miniaturization of the insertion guide device.

[0280] [Eleventh Variation Example]

[0281] Figure 24 The eleventh variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0282] like Figure 24 As shown, the insertion guide device 4K of the eleventh modification is constructed with a structure that is substantially the same as that of the tenth modification described above, but the shape of the multiple elongated slots that serve as retaining components is slightly different.

[0283] In the eleventh modification of the insertion guide device 4K, a plurality of elongated slots 4j2 are formed along the long axis direction on the plane of the flat plate member 4Ka, substantially similar to those in the tenth modification. Furthermore, these elongated slots 4j2 are arranged at predetermined intervals in the width direction of the flat plate member 4Ka. Here, the slot width W5 of each elongated slot 4j2 is, for example, set to a size suitable for arranging the insertion part 5 of an endoscope, various treatment instruments, etc. 8.

[0284] On the other hand, the width W5 of the slot opening 4jb of each long slot 4j2 is set to be smaller than the slot width W4 of each long slot 4j2 (W4 > W5). In this case, at least the peripheral area of ​​the long slot 4j2 of the flat plate member 4Ka is made of, for example, an elastic resin member.

[0285] With this structure, when the treatment device or the like is placed in each of the long slots 4j2, and the treatment device or the like is against the slot opening 4jb, when a predetermined pressing force is applied to the side of the insertion part 5, the slot opening 4jb opens against the pressing force, and the treatment device or the like is embedded in the long slot 4j2.

[0286] The treatment device 8, which is thus embedded in the long slot 4j2, is configured to prevent it from falling out of the slot opening 4jb, while allowing it to move freely in the longitudinal direction. With this structure, the membrane component 9 described in the tenth modification can be omitted in the eleventh modification. Other structures are substantially the same as the insertion guide device 4J in the tenth modification.

[0287] As explained above, the insertion guide device 4K according to the eleventh modification can achieve approximately the same effect as the tenth modification described above. Furthermore, according to the eleventh modification, the insertion part 5, the handling device, etc., can be held more reliably without using the membrane component 9.

[0288] Furthermore, in the eleventh modified example, an example is shown that is constructed by setting two long slots 4j2, but it is not limited to this structural example. The number of long slots 4j2 can be set selectively and appropriately.

[0289] [Twelfth Variation Example]

[0290] Figure 25 The twelfth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0291] like Figure 25 As shown, the insertion guide device 4L of the twelfth modification has a structure that is substantially the same as that of the eleventh modification described above, but the shape of the long slot, which serves as a retaining member, is different.

[0292] In the twelfth modification, the insertion guide device 4L has a long groove 4j3 formed along its long axis on the side of the flat plate member 4La in the width direction. Similar to the eleventh modification described above, the width of the long groove 4j3 is set to a size that allows for the placement of the endoscope insertion part, various treatment instruments, etc.

[0293] On the other hand, the width of the groove opening 4jb of the long groove 4j3 is set to be smaller than the groove width of the long groove 4j3. In addition, at least the peripheral region of the long groove 4j3 of the flat plate member 4La is made of an elastic resin component or the like.

[0294] Furthermore, in the twelfth modification, the bent portion 4c is positioned slightly forward of the front end of the flat member 4La. This is a measure to ensure the flexibility of the region near the front end of the flat member 4La, including the bent portion 4c. The other structures are substantially the same as those of the insertion guide 4K in the eleventh modification described above.

[0295] Based on this structure, through the same function as the eleventh variation described above, treatment devices and the like can be easily embedded and arranged in the long slot 4j3.

[0296] As explained above, the insertion guide device 4L according to the twelfth modification can achieve approximately the same effect as the eleventh modification described above. Furthermore, according to the twelfth modification, since the elongated groove 4j3 is disposed on the width-direction side of the flat plate member 4La and formed along the long axis direction, the thickness-direction dimension can be suppressed.

[0297] [Thirteenth Variation]

[0298] Figure 26 The thirteenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0299] like Figure 26 As shown, the insertion guide device 4M of the thirteenth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the shape of the retaining component is different.

[0300] The insertion guide device 4M in the thirteenth variation has a flat plate member 4a and a retaining member. The flat plate member 4a is constructed with the same structure as in the embodiment described above.

[0301] The retaining component consists of a cylindrical component 4b and multiple semi-cylindrical components 4Mbd and 4Mbu. The cylindrical component 4b has the same structure as in one embodiment described above.

[0302] The semi-cylindrical components 4Mbd and 4Mbu are each formed by cutting the cylindrical component 4b along its long axis. The semi-cylindrical component 4Mbd corresponds to the lower half of the cylindrical component 4b when viewed from the front. Similarly, the semi-cylindrical component 4Mbu corresponds to the upper half of the cylindrical component 4b when viewed from the front.

[0303] Furthermore, the semi-cylindrical components 4Mbd and 4Mbu are alternately arranged at predetermined intervals on the side of the flat plate component 4a in the width direction, along the long axis direction of the flat plate component 4a.

[0304] With this structure, the front end of the insertion part 5 is held in the cylindrical member 4b, and the area of ​​the base end side of the insertion part 5 is held in a predetermined range by the semi-cylindrical members 4Mbd and 4Mbu.

[0305] Furthermore, in the thirteenth variation, the cylindrical member 4b is positioned slightly closer to the base end than the front end of the flat member 4a. This is a measure to ensure the flexibility of the region near the front end of the flat member 4a, including the curved portion 4c. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0306] As explained above, the insertion guide device 4M according to the thirteenth modification can achieve approximately the same effect as the twelfth modification described above. Moreover, according to the thirteenth modification, the front end of the insertion part 5 is held by the cylindrical member 4b, and the portion closer to the base end than the cylindrical member 4b is held by the semi-cylindrical members 4Mbd and 4Mbu. Therefore, compared to, for example, the case where the insertion part 5 is inserted through a tubular member for arrangement, the front end to the vicinity of the base end of the insertion part 5 can be arranged easily and quickly.

[0307] [Fourteenth Variation]

[0308] Figure 27 The fourteenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0309] like Figure 27 As shown, the insertion guide device 4N of the fourteenth modification has a structure that is substantially the same as that of the thirteenth modification described above, but the shape of the flat plate component and the retaining component are different.

[0310] In the insertion guide device 4N of the fourteenth variation, the flat plate component 4Na is composed of two plates (4Na1, 4Na2). The two plates (4Na1, 4Na2) are joined together by joining their defined planes to form a flat plate component 4Na.

[0311] The two plates (4Na1, 4Na2) are composed of a first plate 4Na1 and a second plate 4Na2. The first plate 4Na1 has a curved portion 4c at its front end. In addition, a first semi-cylindrical portion 4Nb1 is integrally formed on the side of the first plate 4Na1, forming part of a retaining member.

[0312] Alternatively, the first plate 4Na1 and the first semi-cylindrical portion 4Nb1 can also be formed separately. In this case, they are integrated using bonding or other joining methods.

[0313] On the other hand, the second plate 4Na2 has a second semi-cylindrical portion 4Nb2 integrally formed on its side, forming another part of the retaining member. Alternatively, the second plate 4Na2 and the second semi-cylindrical portion 4Nb2 can also be formed separately. In this case, the two are integrated by means of bonding or the like.

[0314] Furthermore, the first plate 4Na1 and the second plate 4Na2 are joined together at their planar portions, thereby forming a flat plate component 4Na and a cylindrical component 4Nb. The cylindrical component 4Nb then has a through hole 4ba extending from its front end to its base end. An insertion portion of an endoscope, or other necessary treatment instruments, are disposed within this through hole 4ba.

[0315] Furthermore, in the fourteenth modification, the cylindrical member 4Nb is positioned slightly closer to the base end than the front end of the flat member 4Na. This is a measure to ensure the flexibility of the region near the front end of the flat member 4Na, including the curved portion 4c. The other structures are substantially the same as those of the insertion guide 4M in the thirteenth modification described above.

[0316] As explained above, the insertion guide device 4M according to the fourteenth modification can achieve approximately the same effect as the twelfth modification described above. Moreover, according to the fourteenth modification, the front end of the insertion part 5 is held by the cylindrical member 4b, and the portion closer to the base end than the cylindrical member 4b is held by the semi-cylindrical members 4Mbd and 4Mbu. Therefore, compared to, for example, the case where the insertion part 5 is inserted through the tubular member, the front end to the vicinity of the base end of the insertion part 5 can be positioned easily and quickly.

[0317] [Fifteenth Variation]

[0318] Figure 28 The fifteenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0319] like Figure 28 As shown, the insertion guide device 4P of the fifteenth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the shape of the retaining component is different.

[0320] The insertion guide device 4P of the fifteenth variation has a flat plate member 4a and a cylindrical member 4Pb. The flat plate member 4a is constructed with the same structure as in the embodiment described above. The cylindrical member 4Pb is disposed on the side of the flat plate member 4a in the width direction along the long axis of the flat plate member 4a within a predetermined range from near the front end to near the base end. The cylindrical member 4Pb is integrally formed with the flat plate member 4a.

[0321] Alternatively, the flat plate component 4a and the cylindrical component 4Pb can also be formed separately. In this case, they are integrated using bonding or other joining methods.

[0322] Furthermore, the cylindrical component 4Pb has a through hole 4ba extending from the front end to the base end. An insertion part of an endoscope and other treatment instruments are disposed in this through hole 4ba, as needed.

[0323] Furthermore, in the fifteenth variation, the cylindrical member 4Pb is positioned slightly closer to the base end than the front end of the flat member 4a. This is a measure to ensure the flexibility of the region near the front end of the flat member 4a, including the curved portion 4c. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0324] As explained above, the insertion guide device 4P according to the fifteenth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the fifteenth modification, substantially the same effects as the twelfth to fourteenth modifications described above can be achieved.

[0325] [Sixteenth Variation]

[0326] Figures 29-31 This is a diagram illustrating the sixteenth variation of the insertion guide device according to an embodiment of the present invention. Wherein, Figure 29 It is a three-dimensional diagram showing the general structure of the insertion guide device. Figure 30 , Figure 31 It means Figure 29 A schematic diagram of the folding process of the insertion guide device. Figure 30 This indicates the intermediate state during the folding process. Figure 31 This indicates that the folding process is complete.

[0327] like Figure 29 As shown, the insertion guide device 4Q of the sixteenth variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the difference is that the flat plate component is folded.

[0328] The insertion guide device 4Q of the sixteenth modification includes a flat plate component 4Qa, a cylindrical component 4b, and a base end fixing device 4Qd. The flat plate component 4Qa is composed of two plates (4Qa1 and 4Qa2). These two plates (4Qa1 and 4Qa2) are formed by dividing the flat plate component 4Qa in half approximately at its central width. The two plates (4Qa1 and 4Qa2) are connected by a membrane component 4k, thereby enabling it to be folded freely.

[0329] That is, in this case, the two sheets (4Qa1, 4Qa2) are connected by the membrane component 4k, and along... Figure 30 The two sheets (4Qa1 and 4Qa2) can be rotated relative to each other in the direction of arrow C. This allows them to be folded.

[0330] Furthermore, in its unfolded state, the flat plate member 4Qa, composed of two plates (4Qa1, 4Qa2) connected by the membrane member 4k, has a base end fixing device 4Qd near its base end. This base end fixing device 4Qd is a hollow rectangular shape and is positioned on the outer periphery of the base ends of the two plates (4Qa1, 4Qa2) in the unfolded state. Thus, the base end fixing device 4Qd maintains the two plates (4Qa1, 4Qa2) in their unfolded state.

[0331] The two plates (4Qa1, 4Qa2) are composed of a first plate 4Qa1 and a second plate 4Qa2. The first plate 4Qa1 has a curved portion 4c at its front end. In addition, the second plate 4Qa2 has a cylindrical member 4b integrally provided on its side as a holding member.

[0332] In this case, the bending portion 4c and the cylindrical component 4b are configured such that, when the two plates (4Qa1, 4Qa2) are folded, regardless of whether they are in the middle of the folding process (see reference 4Qa1, 4Qa2), they are in the same position. Figure 30 ) or the final folded state (refer to) Figure 31 They will not interfere with each other under any circumstances. Other structures are substantially the same as the insertion guide device 4 of the first embodiment described above.

[0333] In the insertion guide device 4Q of the sixteenth variation with such a structure, it can be used in two ways: a wide state in which the two plates (4Qa1, 4Qa2) are unfolded, and a narrow state in which the two plates (4Qa1, 4Qa2) are folded up.

[0334] As explained above, the insertion guide device 4Q according to the sixteenth modification can achieve roughly the same effects as the first embodiment described above. Furthermore, according to the sixteenth modification, since the flat plate member 4Qa is configured to fold freely, it can be used in both a wide and narrow configuration, allowing for selection of an appropriate usage method based on the internal condition of the subject. Additionally, the folded configuration also facilitates compact storage.

[0335] [Seventeenth Variation]

[0336] Figure 32 The seventeenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0337] like Figure 32 As shown, the insertion guide device 4R of the seventeenth modification is constructed with a structure that is substantially the same as that of the sixteenth modification described above, but the shape of the flat plate component and the retaining component are different.

[0338] The insertion guide device 4R of the seventeenth modification has a flat plate member 4Ra composed of two plates (4Ra1, 4Ra2). These two plates (4Ra1, 4Ra2) are formed by dividing the flat plate member 4Ra in approximately the center of its width. The two plates (4Ra1, 4Ra2) are connected by a hinge portion 4m. Thus, the two plates (4Ra1, 4Ra2) are connected by the hinge portion 4m, and along... Figure 32 The two sheets (4Ra1, 4Ra2) can be rotated relative to each other in the direction of arrow C. This allows them to be folded.

[0339] Furthermore, when the flat plate member 4Ra, which is composed of two plates (4Ra1 and 4Ra2) connected by the hinge part 4m, is in the unfolded state, the unfolded state of the two plates (4Ra1 and 4Ra2) is maintained by a locking mechanism (not shown) (for example, using a known fixing unit that applies a pawl stop mechanism or a snap-fit ​​mechanism).

[0340] The two plates (4Ra1, 4Ra2) are composed of a first plate 4Ra1 and a second plate 4Ra2. The first plate 4Ra1 has a bent portion 4c at its front end. Furthermore, a through hole 4ma is formed in the hinge portion 4m, extending from the front end of the flat member 4Ra to its base. An endoscope, treatment device, etc. (not shown), is disposed in this through hole 4ma. Therefore, in this seventeenth modification, the cylindrical member 4b is not provided. Other structures are substantially the same as the insertion guide device 4Q in the sixteenth modification described above.

[0341] As explained above, the insertion guide device 4R according to the seventeenth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the seventeenth modification, the flat plate member 4Ra is configured to fold freely, and a through hole 4ba is provided in the hinge portion 4m for realizing the folding structure, through which an endoscope and treatment instruments are disposed, thus contributing to the miniaturization of the insertion guide device 4R.

[0342] [Example 18]

[0343] Figure 33 The eighteenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device. Figure 34 This is a diagram illustrating the function of the insertion guide device in the eighteenth variation when it is being stored.

[0344] like Figure 33 As shown, the insertion guide device 4S in the eighteenth variation has a structure substantially the same as that in the embodiment described above, but the shape of the flat plate component is different. Furthermore, in Figure 33 , Figure 34 In this embodiment, the cylindrical component has the same structure as in one embodiment, and its illustration is omitted.

[0345] The insertion guide device 4S of the eighteenth modification has a flat plate member 4Sa, a cylindrical member (not shown) and a plurality of plate blocks 4n.

[0346] The flat plate component 4Sa utilizes a thin plate component formed from a flat plate that is shaped into a strip. By using a thin plate component, greater flexibility in the thickness direction can be ensured.

[0347] The flat plate member 4Sa has a curved portion 4c at its front end. Multiple plate-shaped blocks 4n are arranged along the long axis on the surface of the flat plate member 4Sa opposite to the bending direction of the curved portion 4c. In this case, the multiple plate-shaped blocks 4n are arranged with a small gap between adjacent plate-shaped blocks 4n. Other structures are substantially the same as those of the insertion guide device 4 of the first embodiment described above.

[0348] In the insertion guide device 4S of the eighteenth variation configured in this way, an arrow F (see reference) is applied to the front end of the flat plate member 4Sa. Figure 33 When subjected to force, the flat plate 4Sa bends in the direction of the bent portion 4c. Figure 33 The arrow (R1 in the image) bends and curves. Figure 33 In Chinese, "O" indicates that it can be bent.

[0349] On the other hand, relative to the direction opposite to the bending direction of the bent portion 4c ( Figure 33(In the direction of arrow R2), the plate-shaped blocks 4n interfere with each other, thereby preventing the bending of the flat plate component 4Sa. Figure 33 In this context, "X" indicates that the object cannot be bent.

[0350] Thus, in the eighteenth variation of the insertion guide device 4S, a structure is formed that allows bending in only one direction.

[0351] In addition, the flat plate component 4Sa uses a thin plate component that is easily flexible, therefore, as Figure 34 As shown, it can be rolled up. Therefore, it has a structure that can be stored more compactly when not in use.

[0352] As explained above, the insertion guide device 4S according to the eighteenth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the eighteenth modification, the flat member 4Sa can be configured to bend in only one direction. Additionally, since it can be easily wound, it contributes to miniaturization when the insertion guide device 4S is stored.

[0353] [Nineteenth Variation]

[0354] Figure 35 The nineteenth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0355] like Figure 34 As shown, the insertion guide device 4T in the nineteenth modification has a structure that is substantially the same as that in the eighteenth modification, but the shape of the flat plate component is slightly different. Furthermore, in Figure 35 In this embodiment, the cylindrical component has the same structure as in one embodiment, and its illustration is omitted.

[0356] In the nineteenth variation, the flat plate member 4Ta of the insertion guide device 4T utilizes a thin plate member formed from a flat, strip-shaped plate. The flat plate member 4Ta has a curved portion 4c at its front end.

[0357] Furthermore, the flat plate member 4Ta has a plurality of slits 4p extending from one side in the width direction to the other side. These slits 4p are arranged at predetermined intervals along the long axis. Moreover, the slits 4p are formed on a surface opposite to the bending direction of the curved portion 4c. Other structures are substantially the same as those of the insertion guide device 4 in the first embodiment described above.

[0358] In the nineteenth modified example of the insertion guide device 4T configured in this way, the flat plate member 4Ta is bent in the direction of the bent portion 4c. Figure 35The arrow R1 in the middle) flexes and bends. On the other hand, in the direction opposite to the bending direction of the bent part 4c, the adjacent notches 4p interfere with each other, and the bending of the flat plate part 4Ta is prevented.

[0359] As explained above, the insertion guide device 4T according to the nineteenth modification can achieve approximately the same effect as the eighteenth modification described above. Furthermore, according to the nineteenth modification, since the flat plate component 4a is formed solely from thin plate components, the structure is simplified, miniaturization is facilitated, and manufacturing costs are reduced.

[0360] [Twentieth Variation]

[0361] Figure 36 The twentieth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0362] like Figure 36 As shown, the insertion guide device 4U in the twentieth variation has a structure substantially the same as that of the first embodiment or the eighteenth variation described above, but the shape of the flat plate component is different. Furthermore, in Figure 36 In this embodiment, the cylindrical component has the same structure as in one embodiment, and its illustration is omitted.

[0363] The insertion guide device 4U of the twentieth variation has a flat plate member 4Ua, a cylindrical member (not shown) and a plurality of long plate-shaped blocks 4q.

[0364] The flat plate component 4Ua utilizes a thin plate component formed from a flat, strip-shaped plate. The flat plate component 4Ua has multiple bends 4c at its front end.

[0365] The flat plate member 4Ua has a plurality of elongated plate-shaped blocks 4q arranged along its width on the side opposite to the bending direction of the curved portion 4c. In this case, the plurality of elongated plate-shaped blocks 4q are arranged such that there is a small gap between adjacent elongated plate-shaped blocks 4q.

[0366] Furthermore, in the twentieth variation, the curved portion 4c is formed at positions corresponding to the long plate-shaped blocks 4q on both sides of the long plate-shaped blocks 4q in the width direction. Other structures are substantially the same as those of the insertion guide devices 4, 4S in the first embodiment or the eighteenth variation described above.

[0367] In the twentieth variation of the insertion guide device 4U, which is constructed in this way, it becomes a structure that can be wound around a long axis.

[0368] Furthermore, the curved portion 4c is formed to be elastic, such as Figure 36 It can be bent into an open shape. Furthermore, it can be deformed and rolled up when stored.

[0369] As explained above, the insertion guide device 4U according to the twentieth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the twentieth modification, since it can be wound around a long axis for storage, it helps to simplify the carrying of the insertion guide device 4U and make it smaller when stored.

[0370] [Example 21]

[0371] Figure 37 The twenty-first variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0372] like Figure 37 As shown, the insertion guide device 4V of the twenty-first modification is constructed with a structure that is substantially the same as that of the first embodiment or the seventh modification described above, but the shape of the flat plate component is different.

[0373] In the twenty-first modification, the flat plate member 4Va of the insertion guide device 4V has a curved portion 4c, multiple transverse slits 4p1, longitudinal slits 4p2, and an internal through passage 4r. The curved portion 4c is located at the front end of the flat plate member 4Va.

[0374] The cross-section of the flat plate member 4Va on the side closer to the base end than the curved portion 4c is generally groove-shaped. Therefore, a longitudinal slit 4p2 along the long axis is formed in the approximately central region of a plane of the flat plate member 4Va, that is, the plane on the side opposite to the bending direction of the curved portion 4c. Furthermore, an internal through-passage 4r serving as a retaining member is formed in the internal region intersecting this longitudinal slit 4p2.

[0375] Multiple transverse slits 4p1 are formed along the width direction on one plane (the plane opposite to the bending direction of the curved portion 4c) and both sides of the flat member 4Va. The multiple transverse slits 4p1 are arranged at predetermined intervals along the long axis. In this case, the multiple transverse slits 4p1 are configured to become narrower closer to the front end.

[0376] Specifically, for example, in Figure 37 In the first region represented by label D1, the second region represented by label D2, and the third region represented by label D3, the spacing of the transverse gaps 4p1 is made different, and the spacing is set to be narrower towards the front end.

[0377] For example, the interval G1 in the first region D1, the interval G2 in the second region D2, and the interval G3 in the third region D3 are set to G3 > G2 > G1. With this setting, the flat plate component 4Va is designed to be more flexible towards the front end.

[0378] The internal passageway 4r is a through-passage that passes through the flat plate-shaped component 4Va and has a relatively wide space. In addition to various treatment instruments, the insertion portion of an endoscope can also be inserted into this internal passageway 4r. Other structures are generally the same as those of the insertion guide devices 4 and 4G in the first embodiment or the seventh variation described above.

[0379] As explained above, the insertion guide device 4V according to the twenty-first modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the twenty-first modification, the flat plate member 4Va has an internal through-passage 4r as a holding member, thus allowing for the placement of various treatment instruments, endoscopes, etc., thereby improving operability. Additionally, since it is not necessary to provide a cylindrical member as a holding member on the side, the dimensions in the width direction can be miniaturized.

[0380] [Example 22]

[0381] Figure 38 The twenty-second variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0382] like Figure 38 As shown, the insertion guide device 4W of the twenty-second modification has a structure that is substantially the same as that of the twenty-first modification, but the shape of the flat plate component is different.

[0383] The insertion guide device 4W of the twenty-second modification has a flat plate member 4Wa and a retaining member 11. The flat plate member 4Wa has a bent portion 4c and a hook portion 4x. The bent portion 4c is located at the front end of the flat plate member 4Wa.

[0384] After the hook portion 4x extends a predetermined length along the thickness direction from a plane at both sides of the flat plate member 4Wa in the width direction, its ends extend inward in opposite directions in the width direction. Thus, the cross-section of the hook portion 4x is formed into a hook shape. Furthermore, at this time, the retaining member 11 extends from the base end side of the flat plate member 4Wa along... Figure 38 The arrow Q is inserted into the area surrounded by a plane of the flat plate part 4Wa and two hooks 4x.

[0385] The retaining member 11 has a hollow rectangular cross-section and a portable internal space 11a that is wide in the width direction and narrow in the thickness direction. Treatment instruments, endoscope insertion parts, etc., can be inserted into this internal space 11a. Other structures are generally the same as those of the insertion guide devices 4 and 4V in the first embodiment or the twenty-first variation described above.

[0386] As explained above, the insertion guide device 4W according to the twenty-second modification can achieve approximately the same effects as the first embodiment or the twenty-first modification described above. Furthermore, according to the twenty-second modification, by simply inserting the retaining member 11 into the area formed by a plane of the flat member 4Wa and the hook portion 4x, a relatively large insertion path can be ensured, thus allowing for easy placement of various treatment instruments, endoscopes, etc.

[0387] [Example 23]

[0388] Figure 39 The twenty-third variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0389] like Figure 39 As shown, the insertion guide device 4X of the twenty-third variation is constructed with a structure that is substantially the same as that of the embodiment described above, but the shape of the flat plate component and the retaining component is different.

[0390] In the twenty-third variation, the flat plate member 4Xa of the insertion guide device 4X has a plurality of protrusions (4s, 4t), which are formed at predetermined intervals along the long axis of the flat plate surface that is flat and formed into a strip. Here, the plurality of protrusions includes a first protrusion 4s and a second protrusion 4t.

[0391] The first protrusion 4s has: a device holding portion 4s1 that protrudes outward from one side of the flat plate member 4Xa in the width direction; and a wire 4s2 that protrudes on the plane of the flat plate member 4Xa in a direction perpendicular to the width direction.

[0392] The device holding part 4s1 is a holding component for holding the insertion part of an endoscope, etc. The device holding part 4s1 is formed with a through hole that extends along the long axis and allows the insertion part of the endoscope, etc., to be inserted and removed freely.

[0393] The wire guide 4s2 is a retaining component that guides the curved wire 10, which is arbitrarily bent by the insertion guide device 4X, through an operation. The wire guide 4s2 has a through hole that extends along the long axis and allows the two curved wires 10 to be inserted and retracted freely. The wire guide 4s2 has two through holes spaced apart in the width direction.

[0394] The second protrusion 4t forms a protrusion with the same shape as the wire guide 4s2 of the first protrusion 4s by providing a groove on the plane of the flat member 4Xa. The second protrusion 4t has a through hole that extends along the long axis and allows two bending wires 10 to be inserted into it freely.

[0395] Furthermore, the two bending lines 10 are connected to a line operation section (not shown) located at the base end of the insertion guide device 4X. By using the line operation section to pull or loosen the two bending lines 10, the bending operation of the insertion guide device 4X can be performed.

[0396] In this case, the bending operation of the bending wire 10 on the flat plate member 4Xa is usually mainly in the bending direction of the bending portion 4c. However, it is not limited to this operation; for example, the flat plate member 4Xa can also be bent in the width direction. For this purpose, for example, a method such as forming the flat plate member 4Xa using a highly flexible material can be implemented. Other structures are generally the same as those of the insertion guide device 4 in the first embodiment described above.

[0397] As explained above, the insertion guide device 4X according to the twenty-third modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the twenty-third modification, the flat member 4Xa can be arbitrarily and actively bent in the desired direction by a desired amount using the bending wire 10. Therefore, it can further contribute to improving the insertability of the endoscope insertion section.

[0398] [Twenty-fourth variation]

[0399] Figure 40 The twenty-fourth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0400] like Figure 40 As shown, the insertion guide device 4Y of the twenty-fourth modification has a structure that is substantially the same as that of the twenty-third modification described above, but the shape of the flat plate component and the retaining component is different.

[0401] In the twenty-fourth variation, the flat plate member 4Ya of the insertion guide device 4Y has a bent portion 4c, a plate 4u, and a conductor 4t. The plate 4u is formed as a flat strip and includes the bent portion 4c at its front end.

[0402] The wire guide 4t is formed separately from the sheet metal 4u and can be easily installed and removed by inserting the support pin 4v into the fitting hole 4w of the sheet metal 4u. Multiple wire guides 4t are arranged at predetermined intervals along the long axis on the plane of the sheet metal 4u.

[0403] The guide wire 4t has through holes spaced at predetermined intervals in the width direction, extending along the long axis. Other structures are substantially the same as those of the insertion guide device 4X in the twenty-third variation described above.

[0404] As explained above, the insertion guide device 4Y according to the twenty-fourth modification can achieve approximately the same effect as the twenty-third modification described above.

[0405] [Example 25]

[0406] Figure 41 The twenty-fifth variation of the insertion guide device according to an embodiment of the present invention is shown in an enlarged perspective view of a portion of the front end region of the insertion guide device.

[0407] like Figure 41 As shown, the insertion guide device 4Z of the twenty-fifth modification has a structure that is substantially the same as that of the fourth modification described above, but the shape of the flat plate component is different. Furthermore, in Figure 41 In this embodiment, the cylindrical component has the same structure as in one embodiment, and its illustration is omitted.

[0408] In the insertion guide device 4Z of the twenty-fifth modification, the flat plate component 4Za has three plates (4Za1, 4Za2, 4Za3), a bending portion 4c, and two plate operating portions (15, 16).

[0409] The three boards consist of a first board 4Za1, a second board 4Za2, and a third board 4Za3.

[0410] The first plate 4Za1 has a curved portion 4c at its front end. A pin 12 is erected vertically from the plane of the first plate 4Za1 in a direction perpendicular to its long axis. The pin 12 is inserted into the guide grooves (14a, 14b) of the second plate 4Za2 and the third plate 4Za3, which will be described later.

[0411] The second plate 4Za2 and the third plate 4Za3 have guide grooves 14a and 14b extending along the long axis within a specified range near the front end.

[0412] Furthermore, the first sheet 4Za1, the second sheet 4Za2, and the third sheet 4Za3 are stacked in the thickness direction. In this case, the ends of the three sheets (4Za1, 4Za2, and 4Za3) are staggered by a predetermined distance in the long axis direction.

[0413] Two plate operating parts (15, 16) are disposed on the base end side of the insertion guide device 4Z. Here, the two plate operating parts are the third plate operating part 15 and the second plate operating part 16.

[0414] The third plate operating part 15 is an operating component that allows the third plate 4Za3 to slide freely along its long axis. The third plate operating part 15 has a connecting pin 15a and a fixing device 15b.

[0415] The connecting pin 15a passes through the fixing device 15b and connects to the third plate 4Za3, enabling the third plate 4Za3 to slide together with the fixing device 15b along the long axis.

[0416] The fastener 15b is a component that binds three sheets (4Za1, 4Za2, 4Za3) at a predetermined position on the base side. In this case, the fastener 15b is connected to the third sheet 4Za3 by means of the connecting pin 15a, but can slide freely relative to the first sheet 4Za1 and the second sheet 4Za2.

[0417] The second plate operating part 16 is an operating component that allows the second plate 4Za2 to slide freely along its long axis. The second plate operating part 16 has a connecting pin 16a and a fixing device 16b.

[0418] The connecting pin 16a passes through the fixing device 16b and connects to the second plate 4Za2. The connecting pin 16a allows the second plate 4Za2 to slide together with the fixing device 16b along the long axis.

[0419] The fastener 16b is a component that binds two plates (4Za1, 4Za2) at a predetermined position on the base end side. In this case, the fastener 16b is connected to the second plate 4Za2 by means of the connecting pin 16a, but can slide freely relative to the first plate 4Za1.

[0420] Furthermore, the second plate operating part 16 is positioned at a predetermined position closer to the base end than the third plate operating part 15. Other structures are substantially the same as those described in the first embodiment or the fourth variation above.

[0421] As explained above, the insertion guide device 4Z according to the twenty-fifth modification can achieve substantially the same effects as the first embodiment described above. Furthermore, according to the twenty-fifth modification, the flexibility of the tip can be adjusted by adjusting the position of the three plates along their long axis. Therefore, it can further improve the insertability of the endoscope insertion section into the patient's body.

[0422] However, in the insertion guide device of the above-described embodiment and its variations, a structure is illustrated in which a retaining member (cylindrical member) for mounting the endoscope insertion part is provided on the front end side of the flat member, and the insertion part is fixed by a locking part while the insertion part is inserted into the through hole of the retaining member (cylindrical member). However, this structure is not necessarily limited to this example.

[0423] For example, the retaining component (cylindrical component) can also be a form that only has a through hole and removes the locking part.

[0424] In this case, it is also considered to form a structure in which the through hole of the retaining component (cylindrical component) is configured to be loosely fixed only by inserting the front end of the insertion part, and reliably and firmly fixed on the base end side (hand side) of the insertion part.

[0425] Furthermore, in order to maintain the state in which the front end of the insertion part is inserted into the retaining member (cylindrical member), it is preferable to also have a structure that prevents the insertion part from being pulled out. This is because, after inspection, when the insertion guide device is pulled out, it is preferable that the insertion part can be pulled out together with the insertion guide device without detaching.

[0426] With this structure, the tip of the insertion part can be reliably guided to the desired location using an insertion guide device. Simultaneously, when the tip of the insertion part reaches the desired location, the fixation of the insertion part on the hand side can be released.

[0427] This ensures the forward and backward movement of the insertion part along its long axis. Therefore, when using an insertion part with an insertion guide device, insertion can be performed easily and reliably, and post-insertion inspection can be easily conducted, making it an insertion guide device with excellent operability.

[0428] This invention is not limited to the embodiments described above, and various modifications and applications can be implemented without departing from the spirit of the invention. Furthermore, the invention includes various stages in the above embodiments, and various inventions can be extracted through appropriate combinations of the disclosed constituent elements. For example, if the problem to be solved and the effect of the invention can be obtained even if several constituent elements are deleted from all the constituent elements shown in one of the above embodiments, the structure with the deleted constituent elements can be extracted as an invention. Moreover, the constituent elements of different embodiments can be appropriately combined. This invention is not limited to its specific embodiments except as defined by the appended claims.

Claims

1. An insertion guide device for an endoscope, used for guiding the insertion portion of an endoscope having an insertion portion into a subject, the insertion portion extending along its long axis and having a front end and a base end, characterized in that, The endoscopic insertion guide device includes: A flat plate-shaped component extending along the long axis, having a width perpendicular to the long axis and a thickness perpendicular to both the long axis and the width, wherein the thickness is less than the width; as well as A retaining member that mounts and retains the front end portion of the insertion part on the width-direction side of the front end side of the flat plate member. The flat plate component has a curved portion at its front end that bends in the thickness direction. The retaining component is positioned closer to the base end than the curved portion.

2. The endoscopic insertion guide device according to claim 1, characterized in that, The retaining member is cylindrical in shape and has a through hole through which the insertion part is inserted and a locking part that fixes the front end of the insertion part in a state of being inserted into the through hole.

3. The endoscopic insertion guide device according to claim 1, characterized in that, The flat plate component is configured to have multiple plate components, which are stacked in the thickness direction.

4. The endoscopic insertion guide device according to claim 3, characterized in that, The flat panel component is configured such that a flexible printed circuit board is sandwiched between the stacked plurality of plate components. The flexible printed circuit board has electrodes protruding towards the front end. The electrodes are connected to electrical components.

5. The endoscopic insertion guide device according to claim 1, characterized in that, The flat plate component is formed into a wedge shape that narrows towards the front end.

6. The endoscopic insertion guide device according to claim 3, characterized in that, The stacked plate components are staggered along their long axis from the front end.

7. The endoscopic insertion guide device according to claim 1, characterized in that, The flat plate-shaped components extend along the width direction and are arranged at predetermined intervals along the long axis within a defined area on the front end side.

8. The endoscopic insertion guide device according to claim 1, characterized in that, The two plates of the flat component are connected along the long axis, and the two plates are formed to be foldable around the long axis.

9. An endoscope system comprising: An endoscope comprising an insertion section, an operating section, and a cable; the insertion section extending along its long axis, having a front end and a base end, and being formed in the shape of a slender tube; the operating section connected to the base end of the insertion section and having various operating components; and the cable extending from the operating section; and An endoscopic insertion guide device that guides the insertion of the insertion portion. Its features are, The endoscopic insertion guide device includes: A flat plate-shaped component extending along the long axis of the insertion portion, having a width perpendicular to the long axis and a thickness perpendicular to both the long axis and the width, wherein the thickness is less than the width; and A retaining member that mounts and retains the front end of the insertion portion on the side of the flat plate component in the width direction. The flat plate component has a curved portion at its front end that bends in the thickness direction. The retaining component is positioned closer to the base end than the curved portion.

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