JP6177169B2 - Insertion device, endoscope - Google Patents

Description

  The present invention relates to an insertion device and an endoscope which have an insertion portion having an elongated flexible tube portion and are configured to be able to bend the insertion portion by operating the operation portion.

  In recent years, an insertion device to be inserted into a subject, for example, an endoscope, has been widely used in the medical field and the industrial field. A medical endoscope used in the medical field observes an organ in a body cavity by inserting a long and thin insertion portion into a body cavity as a subject, and a treatment tool provided in the endoscope as necessary. Various treatments can be performed using the treatment tool inserted into the insertion channel. In addition, an industrial endoscope used in the industrial field inserts a long and thin insertion portion of an endoscope into a jet engine as a subject, a factory pipe, or the like so that a region to be examined in the subject can be detected. It is configured so that it can be inspected for scratches and corrosion and inspected for various treatments.

  In recent years, in this type of insertion device for an endoscope or the like, the diameter of the imaging cable has increased due to an increase in the number of parts associated with higher functionality and an increase in the number of pixels of an imaging device for generating an endoscope observation image. Due to various circumstances such as the realization of the space, securing a space for storing and arranging various components and the like has become a problem.

  For example, in an endoscope or the like having a conventional general configuration, for example, various components such as the above-described imaging cable are generally housed and disposed in an operation unit. Therefore, in order to increase the number of parts or insert an imaging cable having a large diameter, the size tends to be larger than that of the conventional one.

  On the other hand, an operation unit in an endoscope having a conventional configuration has a plurality of operation members arranged on the outer surface thereof, and also functions as a part that is held by a user (user) using fingers and holds the entire endoscope. ing. For this reason, there is a strong demand to avoid increasing the size of the operation section of the endoscope as much as possible.

  On the other hand, in a conventional insertion device such as an endoscope, a plate-like support member provided with a flat surface part for arranging various constituent members and the like housed in an operation unit, and the plate-like support member are fixedly held. In general, an operation unit skeleton component made up of a base member is disposed inside the operation unit.

  In a conventional endoscope or the like having such a configuration, the plate-like support member among the skeleton members arranged in the operation portion of the endoscope is configured by a molded part such as an aluminum die cast, for example. Is normal. And the said plate-shaped support member becomes a structure which connects both using means, such as screwing fixation, with respect to the nozzle | cap | die member which consists of cylindrical shapes, for example in an operation part.

  For example, in an endoscope that is an insertion device disclosed in Japanese Patent Application Laid-Open No. 10-234654 and the like, a plate-like support member that is a fixed substrate for disposing various constituent members is a die-casting that uses aluminum for injection molding. It is formed by. A pair of fixing portions that are substantially parallel to the longitudinal direction of the plate-like support member and project in a direction substantially perpendicular to the substrate plane are provided at the insertion portion side end of the plate-like support member. . The outer surface of the fixed portion is formed to have an R surface along an arc shape with the midpoint between the pair of fixed portions as a center point. The fixing portion is covered with a base member that is a cylindrical base having an inner diameter dimension substantially the same as the outer peripheral circular diameter, and the base member is screwed in a substantially vertical direction with respect to the fixing portion.

JP-A-10-234654

  However, in the conventional insertion device disclosed in Japanese Patent Laid-Open No. 10-234654, etc., since the plate-like support member is constituted by a die-cast product, the plate-like support member and the base member are fixed. The fixed part will be thick. Therefore, when various components are inserted and arranged in the internal space of the base member, there is a problem that there is a limit in order to cope with an increase in the size of components and an increase in size.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a connection portion between a support plate member and a base member which are operation unit skeleton parts in an operation unit of an insertion device and an endoscope. In order to achieve the required strength, the connection part between the two can be made thin, and the internal space required for various components to be stored inside can be secured while suppressing the increase in the size of the operating part. It is to provide a device and an endoscope.

In order to achieve the above object, an insertion device according to an aspect of the present invention includes an operation unit for operating the insertion device, and a built-in object provided in the operation unit and housed in the operation unit. a flat plate-like support plate member made of a press-molded article formed with a flat portion, connected to said support plate member, which is formed with a hollow portion for inserting the built-in inside comprising a tubular mouthpiece member, the said support plate member is further pre SL are continuously formed through the bent portion from the flat portion, the inner peripheral surface of the die member from the bent portion or A first fixed portion extending in a first direction along the outer peripheral surface and having a contact surface that contacts the inner peripheral surface or the outer peripheral surface of the base member, and other than the bent portion in the first fixed portion It is continuously formed in the region, along the inner or outer peripheral surface of the cap member relative to said first direction It extends in the second direction direction, comprising a second fixing part having a contact with the abutment surface on the inner or outer peripheral surface of the mouthpiece member.

  According to the present invention, the connecting portion between the support plate member and the base member, which is the operating portion skeleton component in the operating portion of the insertion device and endoscope, can be thinned while ensuring the necessary strength. It is possible to provide an insertion device and an endoscope having a configuration capable of securing an internal space necessary for various components housed therein while suppressing an increase in size of the operation unit.

The principal part schematic block diagram which shows the principal part of the endoscope which is the insertion apparatus of one Embodiment of this invention. FIG. 1 is an enlarged view of a main part showing a part of an internal configuration (part indicated by reference numeral [2] in FIG. 1) in the insertion device (endoscope) of FIG. The principal part expanded sectional view which expands and shows the cross section which follows the [3]-[3] line of FIG. The principal part enlarged side view seen from the arrow [4] direction of FIG. External appearance perspective view which takes out and shows only the support plate member in the insertion apparatus (endoscope) of FIG. The top view seen from the arrow [6] direction of FIG. The top view of the support member which showed the modification of the support plate member in the insertion apparatus of one Embodiment of this invention, and was seen from the direction corresponded to arrow [6] of FIG.

  The present invention will be described below with reference to the illustrated embodiments. In each drawing used for the following description, each component may be shown with a different scale so that each component has a size that can be recognized on the drawing. Therefore, according to the present invention, the number of constituent elements, the shape of the constituent elements, the ratio of the constituent element sizes, and the relative positional relationship of the constituent elements described in these drawings are limited to the illustrated embodiments. It is not a thing. In an embodiment of the present invention described below, an endoscope is described as an example of an insertion device to which the present invention is applied.

  FIG. 1 is a main part schematic configuration diagram showing a main part of an endoscope which is an insertion apparatus according to an embodiment of the present invention. First, an overall schematic configuration of an endoscope which is an insertion device of the present embodiment will be briefly described below with reference to FIG.

  As shown in FIG. 1, an endoscope 1 according to the present embodiment includes an insertion portion 13 that is formed in an elongated shape and inserted into a body cavity, and is connected to the proximal end side of the insertion portion 13 and includes various components therein. Is disposed at the connecting portion between the operation unit 11 for operating the insertion device 1 and the distal end side of the operation unit 11 and the proximal end side of the insertion unit 13, and the insertion unit 13 is suddenly bent. This is mainly composed of a folding portion 12 that suppresses the above, a universal cable 14 that is connected to one side surface of the operation portion 11 and extends outward.

  A connector portion (not shown) is disposed at the distal end portion of the universal cable 14. The endoscope 1 is connected to a control device such as a light source device and a video processor (not shown) via the universal cable 14 and the connector, and is configured to operate as an endoscope system.

  The insertion portion 13 is configured by connecting a flexible elongated flexible tube portion, a bending portion, and a distal end hard portion to each other in order from the proximal end side, and has a flexible elongated configuration portion as a whole. It is. Although not shown, the bending portion operates through an operation member (not shown) provided on the outer surface of the operation unit 11, thereby operating a bending operation mechanism (not shown) provided inside the operation unit 11. It is the component part comprised so that it can be bent and operated. In addition, about the outer surface and internal structure of a front-end | tip hard part, the detailed description and illustration are abbreviate | omitted as what is provided with the thing similar to the endoscope of the conventional general form.

  The operation unit 11 includes an exterior casing 11a that is a casing member that forms a space for accommodating and arranging various constituent members (built-in objects) therein and is watertight to the outside, and the exterior casing. It is mainly comprised by the operation part frame components (the support plate member 21, the nozzle | cap | die member 22) which are fixed to the internal space formed by 11a, and arrange | position the said various structural members (built-in thing).

  The base end side of the insertion portion 13 is connected to one end of the outer casing 11 a of the operation portion 11. In this case, the connecting portion that connects the outer casing 11a and the insertion portion 13 is formed of, for example, an elastic rubber member or the like in order to prevent the flexible tube portion of the insertion portion 13 from being bent suddenly. A folding stop 12 is provided.

  On the outer surface of the outer casing 11a of the operation unit 11, a plurality of various operation members, for example, switches 15 for remotely operating peripheral devices such as a video processor are provided, and illustration thereof is omitted. However, a plurality of bending operation members for bending the bending portion of the insertion portion 13 are arranged freely on the road. The plurality of bending operation members are configured to be mechanically connected to a bending operation mechanism (not shown) disposed in the exterior casing 11a of the operation unit 11 so as to perform the bending operation of the bending unit. Has been.

  In addition, a treatment instrument introduction port 16 for introducing a treatment instrument (not shown) or the like is formed in a portion of the operation unit 11 near one end of the exterior casing 11a. The treatment instrument introduction port 16 communicates with a treatment instrument channel formed inside the endoscope 1. The treatment instrument channel is a tubular insertion passage that passes through the inside of the insertion portion 13 to the treatment instrument channel opening of the distal end rigid portion.

  Next, the detailed structure of the site | part regarding this invention is demonstrated below about the internal structure of the operation part in the endoscope which is an insertion apparatus of this embodiment.

  FIG. 2 is an enlarged view of a main part showing a part of the internal configuration (part indicated by reference numeral [2] in FIG. 1) in the insertion device (endoscope) of FIG. Here, in FIG. 2, the outer casing 11 a of the operation unit 11 is omitted, and the connection between the support plate member 21 and the base member 22 constituting the operation unit skeleton component of the internal configuration of the operation unit 11 is illustrated. The part is shown enlarged. FIG. 3 is an enlarged cross-sectional view of a main part showing a cross section taken along line [3]-[3] in FIG. FIG. 4 is an enlarged side view of a main part viewed from the direction of arrow [4] in FIG. FIG. 5 is an external perspective view showing only the support plate member in the insertion device (endoscope) of FIG. FIG. 6 is a plan view seen from the direction of arrow [6] in FIG.

  As described above, various constituent members (built-in objects) are accommodated in the operation unit 11. These various constituent members (built-in objects) are fixedly arranged on a flat support plate member 21 that constitutes a part of the operation unit skeleton component. Further, as shown in FIG. 2 and the like, the support plate member 21 is connected and fixed to a cylindrical base member 22 constituting another part of the operating portion skeleton component. The base member 22 has a hollow portion for inserting and arranging various constituent members (built-in objects) therein, and is a cylindrical member formed in, for example, a substantially cylindrical shape.

  Here, there is a demand to secure the internal space of the base member 22 as wide as possible. On the other hand, the connecting portion between the support plate member 21 and the base member 22 tends to be thick in order to ensure the necessary strength. When this portion becomes thick, the internal space of the base member 22 is pressed. For this reason, in order to secure a wider internal space of the base member 22, there is a demand to make the connecting portion as thin as possible.

  Therefore, in the insertion device such as a conventional endoscope, a higher strength iron-based material, such as stainless steel, is applied in the present embodiment to the support plate member formed of a die-cast molded part such as aluminum. The support plate member 21 is formed by the pressed product.

  Specifically, as shown in FIG. 5, the support plate member 21 is a constituent member formed by press-molding a flat plate member having a flat plate shape as a whole. The support plate member 21 is formed at a planar portion 21g for arranging various constituent members (built-in objects) accommodated in the operation portion 11, and at one end portion in the major axis direction of the planar portion 21g. The member 21 is formed with a pair of fixing portions (21 a, 21 b) serving as connection parts for connecting and fixing the base member 22 to the base member 22. That is, the pair of fixing portions (21 a, 21 b) is formed at one end of the support plate member 21, and in this case, when the support plate member 21 is disposed at a predetermined position in the operation unit 11, It is formed so as to protrude toward the side where the member 22 is disposed.

  Here, the connection between the support plate member 21 and the base member 22 is performed by screwing and fixing using, for example, fixing screws 31a and 31b. For this purpose, the base member 22 is formed with a plurality of (four in this embodiment) through-holes 22a through which the fixing screws 31a and 31b are inserted. In addition, a plurality of (two in each embodiment) screw holes 21d are formed in each of the pair of fixing portions (21a, 21b) so as to correspond to the plurality of through holes 22a.

  The pair of fixing portions (21 a, 21 b) of the support plate member 21 has a shape such that its outer surface can come into contact with the inner peripheral surface of the base member 22, that is, a curved surface substantially similar to the inner peripheral surface of the base member 22 ( R surface). Thereby, each of a pair of fixing | fixed part (21a, 21b) of the said support plate member 21 is a predetermined | prescribed range and predetermined | prescribed area in the circumferential direction with respect to the internal peripheral surface of the nozzle | cap | die member 22, as shown in FIG. It is formed so as to abut on. When the support plate member 21 and the base member 22 are connected, the screw holes 21d formed in the pair of fixing portions (21a, 21b) of the support plate member 21 and the plurality of through holes of the base member 22 It arrange | positions so that 22a may correspond. Thus, the support plate member 21 and the base member 22 are connected and fixed using the fixing screws 31a and 31b.

  Of the pair of fixing portions (21a, 21b) of the support plate member 21, one fixing portion 21a is formed so as to abut on the inner peripheral surface of the base member 22 in the circumferential range indicated by reference numeral CS1 in FIG. Yes. Further, the other fixing portion 21b has a first fixing portion 21ba which is a part thereof in a circumferential range indicated by reference numeral CS2 in FIG. 3, and the other second fixing portion 21bb is a reference numeral CS3 in FIG. Are formed so as to be in contact with the inner peripheral surface of the base member 22, respectively.

  Here, regarding the plane of the planar portion 21g of the support plate member 21, one plane is referred to as an A plane and the other plane is referred to as a B plane (see FIGS. 3, 5, and 6). The direction in which the first fixing portion 21ba extends along the inner peripheral surface of the base member 22 is defined as a first direction (see arrow Ex1 in FIG. 3). A direction in which the second fixing portion 21bb extends along the inner peripheral surface of the base member 22 is a second direction (see arrow Ex2 in FIG. 3).

  In this case, the fixing portion 21a is formed in a shape in which a part of the flat portion 21g is cut out in a predetermined shape, and has a predetermined curved surface (a curved surface having the same curvature as the inner peripheral surface of the base member 22). Is formed. The fixing portion 21a is bent in the direction of the arrow R1 in FIG. 6 from the outer edge side to the inner edge side with the A surface side as a trough from the state indicated by reference numeral 21a ′ in FIG. Thereby, in the fixing | fixed part 21a, the contact curved surface (refer code | symbol CS1a of FIG. 6) contact | abutted with the internal peripheral surface of the said nozzle | cap | die member 22 is an extension surface by the side of B in the said plane part 21g. Further, in this case, the bent portion 21ah (see FIGS. 5 and 6) of the fixing portion 21a is located on the outer edge along the major axis direction of the flat portion 21g of the support plate member 21.

  On the other hand, the fixing portion 21b is similarly formed in a form in which a part of the flat surface portion 21g is cut into a predetermined shape, and has a predetermined curved surface (a curved surface having the same curvature as the inner peripheral surface of the base member 22). It is formed to have. The fixing portion 21b is bent in the direction of the arrow R2 in FIG. 6 from the state indicated by the reference numeral 21b ′ in FIG.

  The fixing portion 21b bent in this way with respect to the flat portion 21g is formed and arranged at a position closer to the inner side than the outer edge in the major axis direction of the flat portion 21g, as shown in FIGS. Will be. In other words, the bent portion 21bh (see FIG. 5) of the fixed portion 21b is located on the inner side of the outer edge along the major axis direction of the flat portion 21g of the support plate member 21 and a part of the flat portion 21g ( Reference numeral 21 f in FIG. 5 is formed to protrude outward in a direction orthogonal to the major axis direction of the support plate member 21. When the support plate member 21 is connected and fixed to the base member 22, the protruding portion 21f is formed in a groove shape by cutting out one end edge of the base member 22, as shown in FIG. The cutout groove 22b is fitted and arranged.

  Further, as shown in FIG. 6 and the like, the fixing portion 21b is a first fixing portion 21ba that protrudes in one direction in the direction orthogonal to the plane portion 21g, and is also in the direction orthogonal to the plane portion 21g and the first portion It has 2nd fixing | fixed part 21bb which protrudes in the opposite direction to fixing | fixed part 21ba.

  In other words, the first fixing portion 21ba is a portion integrally connected from the flat portion 21g of the support plate member 21 via the bent portion 21bh. The first fixing portion 21ba extends from the bent portion 21bh in the first direction along the inner peripheral surface of the base member 22 (arrow Ex1 in FIG. 3), and contacts the inner peripheral surface of the base member 22. It has a tangent surface CS2a (see FIG. 6).

  2nd fixing | fixed part 21bb is a site | part provided integrally in area | regions other than the bending part 21bh in 1st fixing | fixed part 21ba. The second fixing portion 21bb is in a second direction (arrow Ex2 in FIG. 3) opposite to the first direction (arrow Ex1 in FIG. 3) along the inner or outer peripheral surface of the base member 22. It has a contact curved surface CS3a (see FIG. 6) that extends and contacts the inner peripheral surface of the base member 22.

  The outer peripheral surface of the first fixing portion 21ba is an abutting curved surface CS2a (see FIG. 6) that abuts on the inner peripheral surface of the base member 22 in a circumferential range indicated by reference numeral CS2 in FIG. The outer peripheral surface of the second fixing portion 21bb is a contact curved surface CS3a (see FIG. 6) that contacts the inner peripheral surface of the base member 22 in the circumferential range indicated by reference numeral CS3 in FIG. Here, the contact curved surface CS2a in FIG. 6 (corresponding to the range CS2 in FIG. 3) and the contact curved surface CS3a in FIG. 6 (corresponding to the range CS3 in FIG. 3) are formed by continuous curved surfaces. .

  In order to place the support plate member 21 configured in this way on the inner peripheral side of the base member 22 and connect and fix the two, first, a pair of fixing portions 21 a and 21 b of the support plate member 21 is installed in the inner space of the base member 22. Insert. The pair of fixing portions 21 a and 21 b is formed to have a curved surface along the inner peripheral surface of the base member 22. At this time, for example, the curved surfaces of the fixing portions 21 a and 21 b are displaced from the inner peripheral surface of the base member 22, so that each of the fixing portions 21 a and 21 b corresponds to the inner peripheral surface of the base member 22. A case where the tangent surface does not contact is conceivable.

  In general, it is difficult to form a member at a desired angle by bending a pressed product because the bending deformation applied when bending is performed may cause a so-called spring back. It is. However, in the present embodiment, the fixing portions 21a and 21b are formed into the base member 22 by the process of forming the contact curved surfaces on the fixing portions 21a and 21b and the step of bending the fixing portions 21a and 21b with respect to the flat portion 21g. It is formed to correspond to. Therefore, in this embodiment, it is relatively easy to adjust the position of the fixing portions 21a and 21b relative to the inner peripheral surface of the base member 22 only by adjusting the bending state of the bent portions 21ah and 21bh of the fixing portions 21a and 21b. Can be done.

  Next, while the fixing portions 21a and 21b are inserted into the inner space of the base member 22, the protruding portion 21f of the flat surface portion 21g of the support plate member 21 is fitted into the notch groove portion 22b of the base member 22, and the support plate member 21 is In the long axis direction, it is pushed in until it can no longer be inserted, that is, until the re-tip portion of the protruding portion 21f of the support plate member 21 comes into contact with the bottom of the notch groove portion 22b. Thus, the support plate member 21 is positioned at a predetermined position with respect to the base member 22. In this state, the support plate member 21 is connected and fixed to the base member 22.

  As described above, according to the first embodiment, since the support plate member 21 is formed of a press-molded product having higher strength, it is possible to contribute to reduction of component manufacturing cost and improvement of component quality. In addition, since it is possible to realize thinning without reducing the strength of the connection portion between the support plate member 21 and the base member 22 by using a press-molded product, it is possible to reduce the size and weight of the component, A stable connection fixing state can be maintained. Furthermore, by reducing the thickness of the connection portion between the support plate member 21 and the base member 22, it is possible to secure a wider internal space, and thus, while suppressing the enlargement of the endoscope 1 (the operation unit 11) itself, It is possible to cope with an increase in various constituent members (built-in items) housed in the portion 11 or an increase in the size of individual constituent members.

  Since the notch groove portion 22b is provided in the base member 22, in the assembly process of connecting and fixing the support plate member 21 to the base member 22, the positional relationship between the two members can be immediately determined, and the notch groove portion 22b On the other hand, the support plate member 21 can be easily positioned with respect to the base member 22 by fitting a predetermined portion (projecting portion 21 f) of the flat surface portion 21 g of the support plate member 21. Therefore, it is possible to contribute to an improvement in assemblability in the manufacturing process of the endoscope 1.

  The shape of the fixed portion 21b after bending is projected in the direction perpendicular to the flat portion 21g, the first fixed portion 21ba protruding in one direction across the flat portion 21g, and the first fixed portion 21ba protruding in the opposite direction. Since the second fixing portion 21bb is included, the base member 22 between the one end of the fixing portion 21a and the one end of the fixing portion 21b in a state where the base member 22 and the support plate member 21 are connected. The gap G in the circumferential direction (see FIG. 3) can be widened (opened), and the contact surfaces of the fixed portions (21a, 21b) of the support plate member 21 and the inner peripheral surface of the base member 22 are matched. The contact area can be increased.

  In the above-described embodiment, the fixing portions (21a, 21b) of the support plate member 21 are configured to contact the inner peripheral surface of the base member 22, but are not limited to such a form. For example, the fixing portions (21 a, 21 b) of the support plate member 21 can be configured to abut on the outer peripheral surface of the base member 22.

  For example, FIG. 7 is a view showing a modification of the support plate member in the insertion device of the above-described embodiment. For example, the support member of this modification is viewed from the direction corresponding to the arrow [6] direction of FIG. It is a top view. As shown in FIG. 7, the support plate member 21 </ b> A is a press-formed product that includes a pair of fixing portions (21 a, 21 b) and a plane portion 21 g, as in the above-described embodiment. In the support plate member 21 </ b> A of the present modification, the inner side surfaces of the first fixing portion 21 ba and the second fixing portion 21 bb of the fixing portion 21 b are configured to contact the outer peripheral surface of the base member 22. Other configurations are the same as those in the above embodiment.

  Even in the support plate member 21 </ b> A of the modified example having such a configuration, it is possible to obtain the same effect as that of the above-described embodiment.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and applications can of course be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent requirement is deleted. The configured structure can be extracted as an invention.

  The present invention can be applied not only to an endoscope control device in the medical field but also to an endoscope control device in an industrial field.

1 …… Endoscope,
11 …… Operation part,
11a …… Exterior housing,
12 …… Folding part,
13 …… Insertion part,
14 …… Universal cable,
15 …… Switches,
16: Treatment tool introduction port,
21, 21 A ... support plate member,
21a, 21b... Fixed part,
21ah, 21bh ...... folded part,
21ba ...... first fixing part,
21bb ...... second fixing part,
21d: Screw hole,
21f …… Protrusions,
21g: Plane section,
22 …… Base member,
22a ...... through hole,
22b ...... notch groove,
31a, 31b ... Fixing screws,

Claims (5)

An operation unit for operating the insertion device;
Provided in the operation portion, and the flat plate-like support plate member having a flat portion for placing internals housed is formed consisting of the press molded product to said operation portion,
A cylindrical base member connected to the support plate member and having a hollow portion for allowing the built-in object to be inserted therein;
With
It said support plate member is further pre SL are continuously formed through the bent portion from the flat portion, extending from the bent portion in a first direction along the inner peripheral surface or outer peripheral surface of the mouthpiece member A first fixing portion that is provided and has a contact surface that contacts an inner peripheral surface or an outer peripheral surface of the base member;
The first fixing portion is continuously formed in a region other than the bent portion, and extends in a second direction opposite to the first direction along the inner peripheral surface or outer peripheral surface of the base member. A second fixing portion having a contact surface that contacts the inner peripheral surface or the outer peripheral surface of the base member;
An insertion device comprising: The base member is formed in a cylindrical shape,
2. The insertion device according to claim 1, wherein the first fixing portion and the second fixing portion have a circumferential surface along the inner circumferential surface or outer circumferential surface of the base member. . The insertion device according to claim 2, wherein the first fixing portion and the second fixing portion are in contact with the outer peripheral surface of the base member. Insertion device, the insertion device according to any one of claims 1 to 3, characterized in that an endoscope.   The insertion device according to claim 1, wherein the support plate member is a press-molded product to which an iron-based material is applied.

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