JP2013150700A - Endoscope - Google Patents

Abstract

An object of the present invention is to prevent a ground plate from being pulled by a gripping case to cause a positional deviation between the ground plate and a casing, and to prevent a movement of an operating means fixed to the ground plate from being deteriorated, thereby ensuring reliable operation. An endoscope that can be provided is provided.
A main body casing having a base plate opening, a plate-like base plate disposed in the main body casing and having a projecting portion protruding outward from the base plate opening, and a shaft serving as a plate surface of the base plate. A cylindrical member fixed to the projecting portion of the main plate, a gripping case having a hollow portion through which the projecting portion of the main plate and the cylindrical member are inserted, and an opening portion for the main plate of the main casing. A fixing ring fixed to the cylindrical member in a state of being pressed against the formed opening surface, and the main plate abuts the opening surface from the inside of the main body casing on the side surface on the side where the protruding portion is formed. By having the contact portion, the above-mentioned problem is solved.
[Selection] Figure 2

Description

  The present invention relates to an endoscope used for medical treatment or the like, and relates to an endoscope in which a base plate for fixing an operation means or the like is disposed in an operation unit.

As is well known, an endoscope is inserted into a living body such as a human body and used for diagnosis and examination of organs.
Endoscopes are basically connected to the insertion part to be inserted into the human body, the operation part to operate the endoscope such as operation of the insertion part and air / water supply, air supply means, water absorption means, suction pump, etc. Connector (LG (Light Guide) connector), and a universal cord (LG flexible portion) that connects the connector to the operation portion and the insertion portion.
The insertion portion is an endoscope provided between a distal end portion incorporating an imaging unit having a CCD sensor, an illumination lens, and the like, a long flexible portion on the proximal end side, and the distal end portion and the flexible portion. And an angle portion that is bent in accordance with an operation at the operation portion.

  The operation unit is provided with an operation unit for operating the insertion unit (angle unit), an operation unit for performing an air / water supply operation, and the like. These operation means are fixed to a ground plate installed inside the operation unit (casing) and arranged so as to protrude from an opening hole formed in the casing of the operation unit.

In general, the casing of the operation unit includes a main body casing in which the operation means is arranged and a gripping case connected to the insertion unit. This gripping case is also a part to be gripped (gripped) for stable operation when the doctor operates the endoscope. Therefore, it is necessary to make the gripping case easy to grip and have a shape and size, and to strengthen the connection with the main body casing so as to ensure the operation of the endoscope.
Therefore, as described in Patent Document 1, as a structure for fixing the main body casing and the gripping case, a cylindrical member is formed at the front end portion (the front end on the insertion portion side) of the ground plate partially disposed in the main body casing. After the cylindrical member is inserted into the gripping case, a fixing ring or the like is screwed onto the outer periphery of the cylindrical member to connect the gripping case to the main casing. It is used.

  As described above, when the fixing ring is screwed into the cylindrical member and the gripping case is fixed, the ground plate provided with the cylindrical member is relatively pulled toward the insertion portion, and the ground plate and the main body casing are separated from each other. Misalignment occurs. If the misalignment between the main plate and the main body casing occurs, the operation part will be distorted as a whole, the movement of the operating means attached to the main plate will be worsened and the operating force will be increased, and there is a risk that reliable operation will not be possible. is there.

  On the other hand, in Patent Document 1, a stopper that can be adjusted by a screw is provided on the base plate, the base plate is fixed to the main body casing, the position of the stopper is adjusted, and the stopper is applied to the inner surface side of the main body casing. It is described that, when the gripping case is fixed by the fixing ring, the main plate is prevented from being pulled toward the insertion portion side by contacting.

JP 11-192199 A

  However, the stopper described in Patent Document 1 is fixed by a screw by adjusting the position by sliding. Since the stopper is only stopped by the friction of the screw, the main plate is pulled to the gripping case side. In this case, it cannot move against the pulling force and moves, and the positional deviation between the main casing and the main plate when the holding case is fixed by the fixing ring cannot be prevented.

  In addition, since the stopper described in Patent Document 1 is configured to come into contact with the main body casing in one place, when the main plate is pulled toward the gripping case, the contact portion between the stopper and the main body casing is used as a fulcrum. The main plate rotates, causing a positional deviation between the main body casing and the main plate.

An object of the present invention is to solve the above-described problems of the prior art, in which an operation unit has a ground plate, a casing, and a gripping case, and a gripping member is gripped by screwing a fixing ring to a cylindrical member provided on the ground plate. In an endoscope configured to connect the case to the main body casing, the main plate is pulled toward the gripping case, and the positional displacement between the main plate and the casing is reliably prevented while suppressing deformation of the main case and the main plate. Another object of the present invention is to provide an endoscope capable of preventing the movement of the operating means fixed to the main plate from deteriorating and performing a reliable operation.
Another object of the present invention is that when the main plate is pulled toward the gripping case, the main plate rotates with the contact portion between the main plate and the main casing as a fulcrum, resulting in a displacement between the main casing and the main plate. It is an object of the present invention to provide an endoscope capable of preventing the movement of the operation means and preventing the movement of the operation means from deteriorating and performing a reliable operation.

  In order to achieve the above object, the present invention includes an insertion portion that is inserted into a subject, and an operation portion that is connected to a proximal end side of the insertion portion, and the insertion portion is inserted into the subject. In the endoscope for observing the part to be observed, the operation unit is disposed in the main body casing having a main plate opening having a base plate opening which is an opening formed on a predetermined surface, and A plate-like ground plate having a protruding portion that protrudes outward from the opening for the ground plate; a cylindrical member that is fixed to the protruding portion of the ground plate with an axis substantially parallel to the plate surface of the ground plate; and A projecting portion and a hollow portion through which the tubular member is inserted, a gripping case connected to a proximal end side of the insertion portion, and the gripping case are formed with the opening for the main plate of the main body casing. It is fixed to the cylindrical member while pressed against the opening surface. An endoscope having a fixing ring, wherein the base plate has a contact portion that contacts the opening surface from the inside of the main body casing on a side surface on the side where the protruding portion is formed. To do.

In the present invention, it is preferable that the base plate has two contact portions that are arranged substantially symmetrically with the protruding portion interposed therebetween.
Moreover, it is preferable that the said fixing ring is screwed together and fixed to the external thread formed in the surrounding surface at the front end side of the said cylindrical member.
Moreover, it is preferable that the said contact part curves in a part of edge part of the said ground plate, and is formed in L shape.
Moreover, it is preferable to arrange | position a contact member between the said contact part of the said ground plate, and the said main body casing, and to contact the said contact part and the said main body casing.

Moreover, it is preferable to have an operation means for operating the endoscope, which is disposed through the inside and outside of the main casing and is fixed to the main plate.
Moreover, it is preferable that the said operation means is for performing the bending operation of the said insertion part.

Moreover, it is preferable that the said main body casing and the said contact part of the said ground plate are surface contact.
Or it is preferable that the said main body casing and the said contact part of the said ground plane are in line contact.
Or it is preferable that the said main body casing and the said contact part of the said ground plane make point contact.

According to the present invention, the operation unit includes a main body casing having a main plate opening, a plate-shaped main plate disposed in the main body casing and having a protruding portion protruding outward from the main plate opening, and an axis of the main plate. A holding member connected to the base end side of the insertion portion, having a cylindrical member fixed to the projecting portion of the main plate and a hollow portion through which the projecting portion of the main plate and the cylindrical member are inserted substantially parallel to the plate surface The base plate has a fixing ring fixed to the cylindrical member in a state where the holding case is pressed against the opening surface of the main body casing where the base plate opening portion is formed, and the base plate has the protruding portion formed. Since the abutting portion that abuts against the opening surface from the inside of the main body casing is provided on the side surface of the main body casing, when the gripping case is connected to the main body casing by screwing the fixing ring to the cylindrical member provided on the main surface casing, Suppresses being pulled toward the gripping case, And that the positional displacement of the main body casing arises can be reliably prevented while suppressing deformation of the main casing and the base plate, the movement of the operating means is fixed to the base plate can be prevented that the worse it is reliable operation.
Moreover, as a preferable aspect of the present invention, since the ground plane has two abutting portions arranged substantially symmetrically with the cylindrical portion interposed therebetween, even when the ground plane is pulled toward the gripping case, two symmetrical abutments are provided. Since it contacts with the main body casing at the portion, the main plate does not rotate with the contact portion as a fulcrum, and displacement of the main body casing and the main plate can be prevented.

It is a figure which shows notionally an example of the endoscope of this invention. It is sectional drawing which shows notionally the operation part of the endoscope shown in FIG. (A) is the elements on larger scale of the operation part shown in FIG. 2, (B) is the BB sectional drawing of (A). It is a perspective view which shows notionally the main-plate unit of the operation part shown in FIG. It is a figure which shows notionally the ground plane unit of the operation part shown in FIG. It is the elements on larger scale of the ground plane shown in FIG. It is a perspective view which shows notionally another example of the ground plane unit used for the operation part of the endoscope of this invention.

  Hereinafter, the endoscope of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

FIG. 1 conceptually shows an example of the endoscope of the present invention.
The endoscope 10 shown in FIG. 1 is inserted into a treatment section for performing treatment or examination of a body cavity (gastrointestinal tract, ear nose throat, etc.), etc. This is a treatment.
The present invention is basically the same as that of a normal endoscope except that the installation structure of the ground plane in the operation unit 14 is different.

  The endoscope 10 is a so-called electronic scope type endoscope that images (photographs) an examination site using a CCD sensor and observes the examination site and takes a moving image or a still image. The endoscope 10 includes an insertion unit 12, an operation unit 14, a universal cord 16, an LG connector 18, and a video connector 20 as in a normal endoscope.

  The insertion part 12 is a long part to be inserted into an examination part such as a body cavity, and the tip part (tip on the insertion side = reverse end to the operation part 14) is the same as a known endoscope. 24, an angle portion 26, and a flexible portion 28.

The angle portion (curved portion) 26 is bent vertically and horizontally (four directions orthogonal) by operating the LR knob 38 or the like in the operation portion 14 in order to insert the distal end portion 24 into the target position or to position the tip portion 24 at the target position. It is an area to do. The angle portion 26 and the operation portion 14 are connected by a pulling wire, and the bending operation is performed by pulling the pulling wire by the operation of the LR knob 38 or the like.
The flexible portion 26 is a portion that connects the distal end portion 24 and the angle portion 26 and the operation portion 14, and is a long portion that has sufficient flexibility for insertion into the examination portion.

The distal end portion 24 incorporates a photographing lens and an illumination lens included in the imaging unit. The imaging unit is a unit that incorporates elements, optical components, and the like necessary for photographing such as a CCD sensor and a photographing lens. A signal line for sending an image taken by the imaging unit is inserted to the video connector 20 via the insertion portion 12 (angle portion 26 and flexible portion 28), the operation portion 14, the universal cord 16, and the LG connector 18.
The illumination lens is a lens for irradiating the part to be inspected with light propagated by a light guide (for example, a bundle of thin optical fibers). The light guide is inserted through the insertion portion 12 (same as above), the operation portion 14, and the universal cord 16 to the LG rod 54 of the LG connector 18.

  Further, a forceps hole, an air supply / water supply nozzle for performing air supply and water supply are formed at the distal end portion 24 of the insertion portion 12.

The operation unit 14 is a part that operates the endoscope 10.
As with a normal endoscope, the operation unit 14 includes a forceps port 32, a suction button 34 for performing suction from the distal end portion 24, and an air / water feeding button for performing air supply and water supply from the distal end portion 24. 36, an LR knob 38, a UD knob 40, etc., which are operation means for bending the angle portion 26, are disposed.

The operation unit 14 includes an LR knob 38 that bends the angle part 26 in the left-right direction, a UD knob 40 that bends in the same vertical direction (a direction perpendicular to the left and right), and an LR brake for holding the angle part 26 in a curved state. 42 and UD brake 46 are also provided.
Further, in addition to these operation means, the endoscope 10 that is an electronic scope uses an imaging unit (CCD sensor) such as a zoom switch, a still image shooting switch, a moving image shooting switch, and a freeze switch. Various switches that an endoscope for observation / photographing has are provided.

Next, the internal structure of the operation unit 14 will be described.
FIG. 2 is a schematic sectional view of the operation unit 14. 2, illustration of the suction button 34, the air / water supply button 36, and the like is omitted.
As shown in FIG. 2, the operation unit 14 includes a main body casing 60, a gripping case 62, a ground plane unit 64, a fixing ring 66, and a contact member 68.

  3A shows an enlarged cross-sectional view inside the main body casing 60, and FIG. 3B shows a cross-sectional view taken along the line BB of FIG. 3A. 3A and 3B, the suction button 34, the air / water supply button 36, the LR knob 38, the UD knob 40, and the like are not shown. In FIG. 3B, only the fixed shaft 78 of the LR knob 38 and the UD knob 40 is shown.

  As shown in FIGS. 2, 3A, and 3B, the main body casing 60 is a box type for accommodating operation means such as a suction button 34 and an air / water supply button 36 formed of resin or the like. It is a shaped casing. Further, the surface on the insertion portion 12 side has an opening surface 60a in which a ground plate opening for projecting a protruding portion 70a of the ground plate 70 described later to the outside of the casing is formed. In addition, an opening hole 60b through which the fixed shaft 78 of the LR knob 38 and the UD knob 40 is disposed is formed on the surface on which the LR knob 38 and the UD knob 40 are disposed. Moreover, the opening hole part is formed in the other surface according to arrangement | positioning of operation means, such as the suction button 34 and the air / water supply button 36. FIG.

Further, on the outer surface of the opening surface 60a of the main body casing 60, a mounting groove for the O-ring 80 is formed in contact with the inner surface of the gripping case 62 described later to keep the gripping case 62 and the main body casing 60 airtight. An O-ring attachment portion is formed.
A main plate 70 is disposed in the main body casing 60.

A part of the main plate unit 64 is disposed in the main body casing 60, and the operating unit 14 such as the LR knob 38, the UD knob 40, the suction button 34, the air / water supply button 36 and the gripping case 62 are fixed to the operation unit 14. It is for improving the intensity | strength of.
4 is a schematic perspective view of the main plate unit 64, FIG. 5 is a plan view of the main plate unit 64, and FIG. 6 is an enlarged view of the connection portion 70b of the main plate 70.
As shown in FIGS. 4 and 5, the main plate unit 64 includes a main plate 70 and a cylindrical member 72.

  The base plate 70 is a flat plate-like member, and is partially sized to be accommodated in the main body casing 60, and a protruding portion 70 a is extended on the side surface on the opening surface 60 a side. The main plate 70 is disposed in the main casing 60 so that the protruding portion 70 a protrudes from the opening for the main plate on the opening surface 60 a of the main casing 60 to the outside of the casing.

  Connection portions 70b for fixing the cylindrical member 72 protruding in the direction perpendicular to the plate surface of the main plate 70 are formed on both ends of the front end side (insertion portion 12 side) of the protruding portion 70a of the main plate 70, respectively. Has been. As shown in FIG. 6, the outer surface of the connecting portion 70 b is formed in a curved surface so as to come into contact with the inner diameter of the cylindrical member 72. Further, screw holes 70c into which screws for fixing the base plate 70 and the cylindrical member 72 are screwed are formed on the outer surfaces of the connecting portions 70b.

A fixing screw 76a for fixing the fixing shaft 78 of the LR knob 38 and the UD knob 40, which are part of the operating means for operating the angle portion 26, is provided at substantially the center of the plate surface of the base plate 70, respectively. A through hole 70d to be inserted is formed.
Here, the side surface of the main plate 70 on the side of the opening surface 60 a of the main body casing 60 (the side surface on which the protruding portion 70 a is formed) is in contact with the opening surface 60 a through the contact member 68. This will be described in detail later.

The cylindrical member 72 is a cylindrical member that is fixed to the side surface on the distal end side of the protruding portion 70 a of the base plate 70. Specifically, the cylindrical member 72 is fixed so that its axis is parallel to the plate surface of the main plate 70 and one end surface thereof faces the side surface on the distal end side of the protruding portion 70a. That is, the shaft of the cylindrical member 72 is formed in the direction from the main body casing 60 toward the insertion portion 12, and is fixed to the protruding portion 70 a of the main plate 70 protruding from the main plate opening of the main body casing 60. .
A through hole 72b is formed on the peripheral surface of the cylindrical member 72 on the base plate 70 side according to the screw hole 70c of the connection portion 70b, and is screwed to the connection portion 70b of the base plate 70.
Further, a male screw is formed on the peripheral surface of the cylindrical member 72 on the distal end side (opposite side of the base plate 70). A fixing ring 66 described later is screwed into the male screw portion 72a.

  In the illustrated example, the base plate 70 and the cylindrical member 72 are screwed. However, the present invention is not limited to this, and various known fixing methods can be used. Further, the base plate 70 and the cylindrical member 72 may be integrally formed.

The contact member 68 is disposed between the side surface of the main plate 70 where the protruding portion 70 a is formed and the opening surface 60 a of the main body casing 60, and the side surface of the main plate 70 where the protruding portion 70 a is formed, and the main body casing 60. It is a plate-like member that contacts the inside of the opening surface 60a. That is, the side surface of the main plate 70 and the opening surface 60 a of the main body casing 60 are in contact via the contact member 68.
Even if the main plate unit 64 is pulled toward the insertion portion 12 by the contact between the side surface of the main plate 70 where the protruding portion 70a is formed and the opening surface 60a of the main body casing 60, the main body casing 60 and the main plate unit 64 are provided. Therefore, it is possible to prevent the operation portion 14 from being entirely distorted and the movement of the operation means fixed to the main plate unit 64 from being deteriorated, and a reliable operation can be performed.
This will be described in detail later.

  Moreover, since the main body casing 60 is normally formed of resin, if the contact area with the ground plane 70 is small, the main body casing 60 is easily deformed due to stress concentration. On the other hand, by bringing the main plate 70 and the main body casing 60 into contact with each other via the contact member 68, the area of the contact surface of the main body casing 60 can be increased and stress concentration can be reduced. The deformation of the main body casing 60 can be prevented.

In the illustrated example, two abutting members 68 are disposed at both ends of the side surface of the main plate 70. The two contact members 68 are arranged substantially symmetrically with respect to the axis of the cylindrical member 72.
By disposing the two abutting members 68 substantially symmetrically with respect to the axis of the cylindrical member 72, even when a tensile force in the direction of the insertion portion 12 is applied to the main plate unit 64, the main plate unit 64 and the main body casing 60 are provided with each other. Since the contact is made at a symmetrical position with respect to the axis of the pulling force, the rotation with the contact portion as a fulcrum does not occur, and the displacement of the main body casing 60 and the main plate unit 64 due to the rotation can be prevented.
The contact member 68 is disposed in the vicinity of the opening of the opening surface 60 a of the main body casing 60.

  The grasping case 62 is a casing for stably grasping (gripping) the endoscope when a doctor operates the endoscope. The gripping case 62 is a substantially rectangular parallelepiped cylindrical member, and is disposed by inserting the cylindrical member 72 of the base plate unit 64 and the protruding portion 70a of the base plate 70 into the hollow portion.

In the drawing, the gripping case 62 is formed so that the cross section gradually decreases in the direction from the main body casing 60 toward the insertion portion 12, and the inner diameter at the end surface on the insertion portion 12 side is a cylindrical member 72. The outer diameter is substantially the same. The inner diameter of the end surface of the gripping case 62 on the main body casing 60 side is formed so as to contact the O-ring 80.
The end surface of the gripping case 62 on the insertion portion 12 side is disposed at the position of the male screw portion 72 a of the cylindrical member 72.

  The gripping case 62 is pressed toward the main body casing 60 by the fixing ring 66 in a state where the cylindrical member 72 of the main plate unit 64 and the protruding portion 70a of the main plate 70 are inserted into the hollow portion, and the opening surface of the main casing 60 60a abuts.

  The fixing ring 66 is a ring-shaped member, and an internal thread that is screwed into the external thread portion 72a of the cylindrical member 72 is formed on the inner diameter portion. The female screw of the fixing ring 66 is screwed with the male screw 72 a of the cylindrical member 72 and abuts against the end surface of the gripping case 62 on the insertion portion 12 side to fix the gripping case 62 against the main body casing 60.

As described above, in the conventional endoscope, when fixing the gripping case by screwing the fixing ring to the cylindrical member, the ground plane is relatively pulled toward the insertion portion, so that the ground plane and the main body casing are In order to prevent misalignment with the main plate, a stopper capable of sliding adjustment is provided on the main plate, and after fixing the main plate to the main body casing, the position of the stopper is adjusted and brought into contact with the inner surface side of the main body casing. It is described.
However, the slide-adjustable stopper is only stopped by the frictional force of the screw, so when the main plate is pulled toward the gripping case, it moves without being able to withstand the pulling force, and the gripping case is moved by the fixing ring. It is not possible to prevent the positional deviation between the main casing and the main plate when fixing the plate.

  In contrast, according to the present invention, the side surface of the main plate unit 64 on which the protruding portion 70a of the base plate 70 is formed and the opening surface 60a of the main body casing 60 are arranged in contact with each other, thereby opening the main body casing 60. Since the base plate 70 and the gripping case 62 are in contact with each other across the surface and the gripping case 62 receives a pulling force on the base plate 70, the gripping case 62 is held by the fixing ring 66 that is screwed into the cylindrical member 72. Even when the main plate unit 64 is pulled toward the insertion portion 12 when pressed against the main body casing, the main casing 60 and the main plate unit 64 can be prevented from being displaced, and the operation portion 14 is distorted as a whole. It is possible to prevent the movement of various operation means fixed to the main plate unit 64 from being deteriorated, and a reliable operation can be performed.

Further, as described above, in the conventional endoscope, since there is only one contact portion between the stopper and the main body casing, when the main plate is pulled toward the gripping case, the contact between the stopper and the main body casing is achieved. The main plate rotates with the portion as a fulcrum, and a positional deviation between the main body casing and the main plate occurs.
On the other hand, as a preferred embodiment, the present invention has two contact portions between the main plate and the main body casing, and the two contact portions are arranged substantially symmetrically with respect to the axis of the cylindrical member 72. That is, since the force is received almost symmetrically with respect to the pulling force when the fixing ring 66 is screwed together, when the main plate is pulled to the gripping case side, the main plate with the contact portion between the main plate and the main body casing as a fulcrum is used. Therefore, it is possible to prevent the positional deviation between the main casing and the main plate due to the rotation of the main plate.

The fixed shaft 78 is a fixed shaft of operation means for performing a bending operation of the angle portion 26, and a pulley to which a pulling wire for pulling the angle portion 26 is attached, an LR knob 38, a UD knob 40, and the like are attached. In the illustrated example, only the fixed shaft 78 is shown for explanation.
The fixed shaft 78 is fixed to the approximate center of the main plate 70 of the main plate unit 64 by a fixing screw 76a. Further, the fixed shaft 78 is disposed so that the distal end side protrudes from the opening hole 60 b of the main body casing 60. Although not shown, a seal member such as an O-ring is disposed between the fixed shaft 78 and the main body casing 60 to make the main body casing 60 airtight.

  In the illustrated example, the operation means (fixed shaft 78) for performing the bending operation of the angle portion 26 is illustrated as the operation means. However, the present invention is not limited to this, and is fixed to the main plate 70. If it is an operation means, the same effect can be expressed also with respect to operation means, such as the suction button 34 and the air / water supply button 36.

The LG (Light Guide) connector 18 is a part for connecting the endoscope 10 to a suction source, a water supply source, an air supply source, and the like in a facility that uses the endoscope. Therefore, the LG connector 18 includes a suction connector 48 for connecting the endoscope 10 and the suction source (suction means), a water supply connector 50 for connecting to the same water supply source (water supply source = water absorption means), An air supply connector 52 and the like for connecting to an air source (air supply means) are provided.
The LG connector 18 is provided with an LG bar 54 for connecting an illumination light source, an S terminal for connecting an S cord when using an electronic knife, and the like.

  Since the endoscope 10 is an electronic scope as described above, the video connector 20 for connecting the processor device and the endoscope 10 is connected to the LG connector 18. Images (image data) captured by the CCD sensor 52 and various instructions in the operation unit 14 are output from the video connector 20 to the processor device or the like via the LG connector 18 by the data cable 78 described above.

The universal cord (LG soft part) 16 is a part for connecting the LG connector 18 and the operation part 14.
The universal cord 16 accommodates / inserts a water supply channel connected to the water supply connector 50, an air supply channel connected to the air supply connector 52, a suction channel connected to the suction connector 48, a light guide, a data cable, and the like.

  Here, although the endoscope 10 of the illustrated example is configured to abut the ground plane 70 and the main body casing 60 via the abutting member 68, the present invention is not limited thereto, and the ground plane 70 is not limited thereto. It is good also as a structure which makes the main body casing 60 contact | abut directly.

Moreover, when making the main board 70 and the main body casing 60 contact directly, it is preferable to form the contact part of the main board 70 in L shape.
FIG. 7 shows another example of the ground plane used in the endoscope of the present invention.
In addition, in the ground plane unit 100 shown in FIG. 7, since it has the same structure as the ground plane unit 64 except the contact part 104 was formed in the end surface of the ground plane 102, the same code | symbol is attached | subjected to the same site | part, In the following description, different parts are mainly described.

Abutting portions 104 bent in an L shape are formed on both end sides of the side surface of the main plate 102 of the main plate unit 100 on the opening surface 60a side (the side surface on which the protruding portion 70a is formed). Yes.
The abutting portion 104 abuts on the inner surface side of the opening surface 60 a of the main body casing 60.
As described above, by providing the base plate 102 with the abutting portion 104 bent in an L shape and abutting against the main body casing 60, the abutting area can be increased and stress concentration can be reduced. The deformation of the casing 60 can be prevented.
Further, a contact member may be further arranged between the L-shaped contact portion 104 and the main body casing 60.

In the illustrated example, the side surface of the main plate 70 and the opening surface 60a of the main body casing 60 are brought into contact with each other at two points. However, the present invention is not limited to this. Or it is good also as a structure made to contact | abut at three or more points.
It is preferable that at least two points symmetrical with respect to the cylindrical member 72, that is, two points symmetrical with respect to the axis of the tensile force applied to the ground plane unit 64 should be contacted. Thereby, the rotation which makes a contact part a fulcrum does not arise, but the position shift with a main body casing and a ground plane by rotation can be prevented.

  In the illustrated example, the opening surface 60a of the main body casing 60 and the contact member 68 (the contact portion 104) are in contact with each other in a plane. However, the present invention is not limited thereto, and the opening surface of the main body casing 60 is not limited thereto. 60a and the contact member may be in a line-contact configuration, or may be configured in a point-contact manner. For example, the surface of the contact member that contacts the main body casing 60 may be formed into a spherical surface.

Next, the assembly of the operation unit 14 of the endoscope 10 will be described in detail.
First, the main plate 70 of the main plate unit 64 is inserted from the opening formed in the opening surface 60 a of the main body casing 60. The ground plane 70 is disposed at a predetermined position in the main body casing 60, and the contact member 68 is disposed between the opening surface 60a of the main body casing 60 and the side surface of the ground plane 70 facing the opening surface 60a. Is installed in the main body casing 60.

Next, the fixed shaft 78 of the operating means for performing the bending operation is disposed through the opening hole 60b of the main body casing 60, and the fixed shaft 78 is fixed to the main plate 70 of the main plate unit 64 by the fixing screw 76a. Furthermore, other parts of the operating means are attached.
The gripping case 62 is arranged so as to cover the cylindrical member 72 of the main plate unit 64 protruding from the opening of the main body casing 60 and the protruding portion 70 a of the main plate 70. Thereafter, the fixing ring 66 is screwed into the male screw portion 72 a of the cylindrical member 72, and the gripping case 62 is held in a state of being pressed toward the main body casing by the fixing ring 66.

Thereby, the main body casing 60, the holding case 62, and the fixed shaft 78 (operation means) are firmly fixed.
Here, since the holding case 62 is pressed against the main body casing 60 side by the fixing ring 66 screwed into the cylindrical member 72 of the main plate unit 64, the main plate unit 64 is moved to the fixing ring 66 side (insertion portion 12 side) by the reaction. ).
However, in the endoscope 10 of the present invention, the side surface of the main plate 70 of the main plate unit 64 and the opening surface 60a of the main body casing 60 are in contact with each other via the contact member 68, so that the main plate unit 64 is fixed. Even if it is pulled to the ring 66 side, there is no positional deviation between the main plate unit 64 (the main plate 70) and the main body casing 60, so that the entire operation unit 14 is not distorted and the movement of the operation means is not deteriorated. The operation can be performed.

  Although the endoscope of the present invention has been described in detail above, the present invention is not limited to the above-described embodiments, and various changes and improvements may be made without departing from the scope of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 Endoscope 12 Insertion part 14 Operation part 16 Universal cord 18 LG connector 20 Video connector 24 Tip part 26 Angle part 28 Soft part 32 Forceps opening 34 Suction button 36 Air supply / water supply button 38 LR knob 40 UD knob 42 LR brake 46 UD brake 48 Suction connector 50 Water supply connector 52 Air supply connector 54 LG rod 60 Main body case 60a Opening surface 60b Opening hole 62 Holding case 64, 100 Ground plate unit 66 Fixing ring 68 Abutting member 70, 102 Ground plate 70a Protruding portion 70b Connection portion 70c Screw hole 70d, 72b Through hole 72 Cylindrical member 72a Male screw part 76a Fixing screw 78 Fixing shaft 80 O-ring 104 Contact part

Claims (10)

An endoscope that includes an insertion portion that is inserted into the subject and an operation portion that is coupled to a proximal end side of the insertion portion, and that observes the observation portion by inserting the insertion portion into the subject. In
The operation unit is
A main body casing having a base plate opening which is an opening formed on a predetermined surface;
A plate-like ground plate that is disposed in the main body casing and has a protruding portion that protrudes outward from the opening for the ground plate;
A cylindrical member that is fixed to the projecting portion of the ground plane with an axis substantially parallel to the plate surface of the ground plane;
A gripping case having a hollow portion through which the protruding portion of the base plate and the cylindrical member are inserted, and connected to a proximal end side of the insertion portion;
A holding ring fixed to the cylindrical member in a state in which the gripping case is pressed against an opening surface in which the base plate opening of the main body casing is formed;
The endoscope according to claim 1, wherein the base plate has a contact portion that contacts the opening surface from the inside of the main body casing on a side surface on the side where the protruding portion is formed.   The endoscope according to claim 1, wherein the base plate includes two abutting portions arranged substantially symmetrically with the protruding portion interposed therebetween.   The endoscope according to claim 1 or 2, wherein the fixing ring is fixed by screwing with a male screw formed on a peripheral surface on a distal end side of the cylindrical member.   The endoscope according to any one of claims 1 to 3, wherein the contact portion is formed in an L shape by curving a part of an end portion of the base plate.   The inside according to any one of claims 1 to 4, wherein an abutting member is disposed between the abutting portion of the main plate and the main body casing to abut the abutting portion and the main body casing. Endoscope.   The endoscope according to any one of claims 1 to 5, further comprising operation means for operating the endoscope, which is disposed so as to penetrate through an inner side and an outer side of the main body casing and is fixed to the base plate.   The endoscope according to any one of claims 1 to 6, wherein the operation means is for performing a bending operation of the insertion portion.   The endoscope according to any one of claims 1 to 7, wherein the main body casing and the contact portion of the base plate are in surface contact.   The endoscope according to any one of claims 1 to 7, wherein the main body casing and the contact portion of the main plate are in line contact.   The endoscope according to any one of claims 1 to 7, wherein the main body casing and the contact portion of the main plate are in point contact.

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