JPH07184827A - Endoscope - Google Patents

Abstract

PURPOSE:To ensure watertightness between a casing lid body and a casing body while facilitating the assembling. CONSTITUTION:A easing lid body lock screw 59 is screwed down on a easing lid body lock plate 60 so that a cover expansion part 54 of the easing lid body and a lock screw fixing part 46 are held being grasped between the head part of the easing lid body lock screw 59 and the casino lid body lock plate 60. In tap this manner, the casing lid body is mounted on a casing body so as to allow loading or unloading. A mounting hole 90 is cut into a U-shaped angular part of the lock screw fixing part 46 while a fixing screw part 91 is provided at a fixing member mounting part 63 where a universal cord is mounted at a position facing the mounting hole 90 of the lock screw fixing part 46. The mounting hole 90 and the lock screw part 91 are joined together withe mounting screw 92 being in a matched state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope, and more particularly to mounting a casing lid on an operating portion of the endoscope.

[0002]

2. Description of the Related Art An operating portion of an endoscope is provided with a casing main body which covers an endoscope operating mechanism and partially has an opening, and a casing lid for closing the opening of the casing main body. In that case, the casing lid is adapted to be attached to the casing body.

As a mounting structure of the casing lid of the operation portion of the endoscope, there is a conventional casing lid mounting structure as disclosed in Japanese Utility Model Publication No. 63-7203. In the casing lid mounting structure disclosed in this publication, a fastening screw portion is formed on a fixing member fixed to the casing body, and the fastening screw portion is provided with a fastening member provided on the outer periphery of the universal cord. By screwing in, the component force of the screwing force is generated between the tightening annular part having a wedge-shaped cross section of the tightening member provided at the end of the universal cord and the inner peripheral projection of the casing lid engaged with this tightening annular part. And the casing lid body is pressed against and abutted against the casing body by the component force of the screwing force to fix the casing lid body.

[0004]

However, in such a casing lid mounting structure, forces other than the component force of the screwing force, which is the abutting force, also act on the casing lid and the casing body. Parts such as the lid and the casing body are deformed. When the parts are thus deformed, not only the watertightness between the casing lid body and the casing body cannot be ensured, but also these parts are damaged.

Further, since the universal cord must be screwed in by engaging the tightening annular portion of the tightening member with the inner peripheral projection of the casing lid, there is a problem that it takes time to assemble.

The present invention has been made in view of the above problems, and an object thereof is to ensure watertightness between a casing lid and a casing main body.
An object is to provide an endoscope that can be easily assembled.

[0007]

In order to solve the above-mentioned problems, an endoscope according to the present invention comprises an endoscope operating mechanism,
At least a casing main body that covers the endoscope operation mechanism and has an opening in part, a casing lid that closes the opening of the casing main body, and a universal cord that projects from the casing lid are provided. In the endoscope, the support member fixed to the casing body is displaceable relative to the support member in a direction perpendicular to the opening direction, and is locked in the opening direction. A first fixing member disposed on the support member, and a second fixing member that cooperates with the first fixing member and clamps the casing lid body between the first fixing member and the first fixing member. It is characterized by having.

[0008]

In the present invention thus constructed, the casing lid is fixed by being sandwiched between the first fixing member and the second fixing member arranged on the supporting member. . Thus, the casing lid is sandwiched between the first fixing member and the second fixing member, so that only the force for bringing the casing body and the casing lid into contact with each other acts on the casing. As a result, the casing body and the casing lid are not deformed or damaged. Therefore, the watertightness between the casing body and the casing lid is ensured. Further, since the first fixing member is provided so as to be displaceable in the direction perpendicular to the opening of the casing main body, it is possible to prevent an assembly error due to variations in dimensions of assembly parts such as the casing main body and the casing lid and deformation during assembly. , Can be absorbed by displacing the first fixing member. Therefore, the casing lid can be reliably fixed by the first fixing member and the second fixing member.

Further, the casing lid can be fixed by simply sandwiching it between the first fixing member and the second fixing member, and at the same time, the assembling error due to the variation in the size of the assembling parts and the deformation at the time of assembling. Therefore, the casing lid can be easily assembled.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall conceptual diagram showing a first embodiment of an endoscope according to the present invention. As shown in FIG. 1, the endoscope 1 according to the first embodiment is composed of an insertion section 2, an operation section 3, and a universal cord 4. The insertion portion 2 is covered with a resin such as polyurethane, and the rear end portion is connected to the operation portion 3, and the connection portion is protected by the break preventing member 5. In addition, a curved portion 6 covered with a soft elastic body is provided at the tip of the insertion portion 2. A distal end hard portion 7 is provided at the distal end of the bending portion 6, and an observation optical system, an image pickup device, and
An illumination optical system, an air / water feeding nozzle, a forceps outlet, etc. are provided.

Outputs from the suction control device 8 used when performing suction, the air supply / water supply valve 9 operated when performing air supply / water supply, and the image pickup device of the distal end hard portion 7 are output to the operation unit 3. A remote switch 10 for processing a video signal is attached to each. Further, two angle knobs 11, 11 made of hard resin are attached to the operation portion 3, and the bending portion 6 can be bent vertically and horizontally by operating these angle knobs 11, 11. Has become. Further, a hard resin free engagement lever 12 is attached to the operation portion 3, and by operating the free engagement lever 12, the bending portion 6 is held in the bending fixed state or released from the bending fixed state. You can do it.

Further, a universal cord 4 is connected to the operating portion 3. The universal cord 4 is covered with a resin such as polyurethane, and a connector 13 formed of a hard resin is attached to the tip thereof. There is. The ends of the universal cord 4 which are connected to the operating portion 3 and the connector 13 are protected by the break preventing member 14 and the break preventing member 15, respectively. The connector 13 has an S mouthpiece 16 for returning the high frequency leakage current to the cauterization power source, a metal water mouthpiece 17 connected to a water supply tank (not shown) for supplying water, and a metal mouthpiece for supplying air. An air supply tube 18, electrical contacts 19 and a light guide end 20 respectively. By connecting the end portion 20 of the light guide to the connector receiver 22 of the light source device 21, the illumination light from the light source device 21 is emitted from the illumination optical system of the distal end hard portion 7.
Further, an electric connector portion 23 is provided on the side surface of the connector 13, and by connecting the connection cord 25 of the video processor 24 to the electric connector portion 23, the electric power output from the image pickup device of the tip rigid portion 7 is output. The signal is displayed as an image on the monitor 26 via the video processor 24.

FIG. 2A is a side view of the operating portion 3 of the endoscope 1 according to the first embodiment, and FIG. 2B is II in FIG.
Sectional drawing which follows the B-IIB line, FIG. 3 is a top view of the operation part 3. FIG. As shown in FIGS. 2A and 3, the operation unit 3 of the endoscope 1 includes a casing body 27, and the casing body 27 is made of a hard resin such as polysulfone for holding the endoscope 1. A grip 28 formed by is provided. The grip 28 is provided with a forceps port 29 for inserting a treatment tool such as forceps, and a forceps plug 30 formed of an elastic body such as silicon rubber is attached to the forceps port 29.

A suction tube 31 made of an elastic material such as vinyl chloride or silicon rubber is attached to the forceps plug 30 via a conduit branch member 32. The suction tube 31 is fitted and fixed in a fixing groove portion 33 provided in the grip 28 as shown in FIG. 2 (b), and its end portion is an inlet pipe of the suction control device 8 as shown in FIG. 3. Connected to path 34. Further, a suction tube 36 is connected to the outlet pipe 35 of the suction control device 8 via an elbow member 37. The suction tube 36 is a suction tube 39 connected to a suction pump (not shown) via a suction tube fixing member 38 attached to the universal cord 4.
Connected with.

FIG. 4 is a cross-sectional view showing the mutual connection structure of the casing body 27, the casing lid 40 and the universal cord 4. As shown in FIG. 4, a frame 42 to which a bending operation device 41 that is an endoscope operation mechanism is fixed is attached inside the casing body 27, and a bending operation portion attachment portion 43 provided on the casing body 27 is attached to the bending operation portion attachment portion 43. Is
As shown in FIG. 3, an angle knob 11 that drives the bending operation device 41 and a free engagement lever 12 are rotatably attached.

A frame 44 is attached to the surface of the frame 42 opposite to the attachment surface of the bending operation device 41, and a universal cord fixing member 45, which is a supporting member, is attached and fixed to the frame 44. . The universal cord fixing member 45 is a top plate-shaped set screw fixing portion 4.
6 and a predetermined number (three in the illustrated example) of support legs 47 that are bent integrally with the set screw fixing portion 46, and a fixed end 48 provided at the lower end of the support leg 47 is a frame. It is fixed to 44 by a support leg fixing screw 55.

Therefore, the operation unit internal storage chamber 50 is formed inside the casing body 27 by the space surrounded by the frame 42, the frame 44 and the universal cord fixing member 45.

The hard end portion 7 of the light guide is connected to the hard end portion 7 of the light guide in the storage chamber 50 in the operating portion.
A light guide fiber (not shown) for transmitting illumination light from the light source device 21, a switch cable (not shown) for connecting the remote switch 10 and the electric connector portion 23, and transmitting a control signal of the video processor 24 from the remote switch 10. (Shown), an image transmission cable (not shown) that connects the tip rigid portion 7 and the electric connector portion 23, and transmits a video signal from the image sensor to the monitor 26 via the video processor 24, the water supply cap 17 and the tip rigid portion. 7, a water supply tube (not shown) for supplying water to the distal end hard portion 7, an air supply pipe 18 and a distal end hard portion 7 which are connected to each other via an air / water supply valve 9.
Is connected via the air / water supply valve 9, and the tip hard portion 7
An air supply tube (not shown) for supplying air to the inside of the universal cord 4 and a grounding cable (not shown) for connecting the grounding cap 16 and the frame 42 and returning a leak current to the grounding cap 16 are respectively provided in the universal cord 4. It is inserted into and built in.

At this time, the set screw fixing portion 46 is provided so as to project from the opening end 51 of the casing main body 27 so that the operation portion accommodation chamber 50 is as large as possible.
In addition, in the operation unit storage chamber 50, the surface on which the suction control device 8 and the air / water supply valve 9 are provided (front surface, that is, the upper surface in FIG. 4) is connected to the opposite side of the universal cord 4 (rear surface, that is, FIG. 4). The inner surface is inclined so that it spreads over the lower surface.

The casing lid 40 is composed of the casing body 2
A locking projection 53 formed on one side of the casing lid 40 is fitted into a locking groove 52 formed in the housing 7. Also,
The casing lid 40 has a large-diameter set screw hole 56 and a small-diameter set screw insertion hole 57 formed in the cover expansion portion 54 of the casing lid 40, and a set screw insertion hole formed in the set screw fixing portion 46. It is fixed to the set screw fixing portion 46 by two casing cover set screws 59 penetrating through. In that case, as shown in FIG. 5, the two casing lid body fixing screws 59 are screwed into the casing lid body fixing plate 60, so that the head of the casing lid body fixing screw 59 and the casing lid body fixing plate 60 are Between the cover extension 54
And the set screw fixing portion 46 are clamped and held. Also,
The set screw fixing portion 46 is formed in a convex shape in its cross section, and is strong against deformation due to bending or pulling, and the casing lid body 40 rattles against the set screw fixing portion 46 of the universal cord fixing member 45. There is no such thing, and it becomes firmly fixed. Thus, the casing lid 40 is detachably attached to the casing body 27. The casing lid body fixing plate 60 constitutes the first fixing member of the present invention, and the casing lid body fixing screw 59 constitutes the second fixing member of the present invention.

As shown in FIG. 5, the casing lid set screw 59 is provided with an O-ring 61, and the casing lid set screw 59 and the set screw hole 56 of the cover extension 54.
It is watertight from the inner surface.

Further, the tip of the casing lid set screw 59 is formed with a spherical tip end spherical portion 62 without corners, and the tip of the casing lid set screw 59 protruding from the casing lid set plate 60 is formed. , A fixing member mounting portion 6 described later
The built-in components such as the light guide fiber protruding from 3 are not damaged. Further, as shown in FIG. 6, a screwing groove 64 formed by an oval hole is provided at the head of the casing lid set screw 59, and the tip of a tool such as a screwdriver is provided in the screwing groove 64. By inserting the casing lid body fixing screw 59 and turning the casing lid body fixing screw 59 into the casing lid body fixing plate 60.
It can be screwed on. In that case, the screw stop groove 64 is not extended to the peripheral edge of the head of the casing lid stop screw 59, and thus the O-ring 61 can reliably perform sealing. The shape of the screw fastening groove 64 is not limited to this elliptical shape, but may be any other shape such as a cross shape according to the tip shape of the tool.

As shown in FIG. 7, the casing lid stop plate 60 has a stop plate receiving groove 6 formed in the fixing member mounting portion 63.
It is loosely fitted in 5, and by this stop plate receiving groove 65,
Casing lid set screw 59 and casing lid set plate 6
The rotation of the casing lid stop plate 60 is regulated when it is screwed with 0.

As shown in FIGS. 4 and 5, a set screw cover groove 66 is provided on the upper surface of the set screw hole 56, and a set screw cover 67 is fitted and embedded in the set screw cover groove 66. As a result, the recess of the set screw hole 56 is eliminated. As a result, the outer surface 68 of the cover extension portion 54 is formed into a smooth surface having no unevenness, and the outer surface 68 can be easily cleaned.

A cover seal 69 is attached to the outer surface 68 of the cover expansion portion 54 including the set screw cover 67 to prevent the set screw cover 67 from falling off. At this time, the cover seal 69 may be printed so that information such as the specifications and model number of the endoscope 1 is clearly displayed. For example, a blank sheet may be left blank so that the user can manage the management number and specifications. The information of the person may be freely writable. The covering seal 69 is made of Teflon, vinyl chloride, or the like with a vinyl coating and has a resistance to a disinfecting liquid or sterilizing gas such as ethylene oxide gas or alcohol. Therefore, the endoscope 1 is conventionally used. It is possible to perform street sterilization and disinfection.

As shown in FIG. 6, a set screw hole 56 into which two casing cover set screws 59, 59 are fitted respectively.
A recess 70 for thinning the cover is provided in the cover expansion portion 54 between them. Further, a recess 71 for lightening is similarly formed near the set screw hole 56.
These recesses 70 and 71 are provided with setscrew holes 56 and become thick, so that recesses are not formed on the surface of the outer surface 68 of the cover extension 54 when the outer surface 68 of the cover extension 54 is molded. The operation part 3 while preventing
We are trying to reduce the weight of.

As shown in FIG. 4, a packing groove 72 is formed all around the edge of the casing lid 40,
A packing 73 is fitted and provided in the packing groove 72. With this packing 73, the casing body 2
7 and the casing lid 40 are watertightly sealed.
In that case, since there is a portion where the packing pressing wall 74 is not present in a part of the casing body 27, a packing stopper 75 is provided in this portion as shown in FIG. 8, and the packing 73 prevents the packing 73 from falling off. Has been prevented. A predetermined number of holes 76 are formed in the packing stopper 75, and these holes 76 are fitted into the packing stopper holding projections 77 having a cylindrical shape integrally formed with the casing lid 40 so as to face the packing stoppers. Holding protrusion 77
By melting and deforming the upper part of, for example, heat,
The packing stopper 75 is prevented from falling off the casing body 27.

As shown in FIG. 9, the packing 73 is formed in a three-dimensional shape such that the packing 73 shifts from side to side on the front side from the upper side to the lower side. When mounting on the reinforcing rib 79 provided in the universal cord mounting opening 78 as described later, the packing 73 is deformed and mounted.

As shown in FIGS. 10 and 11, a suction control device mounting hole 80 for mounting the suction control device 8 is formed in the casing lid 40 to secure a large storage chamber 50 in the operating portion. , Only the portion of the suction control device mounting hole 80 of the casing lid 40 is the casing body 2.
It is provided so as to project in seven directions. Casing lid 40
Reinforcing ribs 79, 79 are provided at two positions on the side of the universal cord mounting opening 78 of the suction control device mounting hole 80. With these reinforcing ribs 79, 79,
The strength is increased so that the portion of the suction control device mounting hole 80 is not damaged by the force applied from the upper surface when the suction control device 8 is mounted. The reinforcing rib 79 may be provided in two or more places. Further, since the reinforcing ribs 79 are provided, the locking projections 53 of the casing lid 40 are provided at two positions sandwiching the reinforcing ribs 79, and the locking groove 52 of the operation portion body also corresponds to the locking projections 53. And it is provided in two places.

As shown in FIG. 4, a fixing member attaching portion 63 provided at an end of the universal cord attaching member 81 is attached to the set screw fixing portion 46. That is, as shown in FIG. 12, the mounting hole 82 is formed in the set screw fixing portion 46.
And mounting holes 83 are respectively formed,
Fixed member mounting portion 63 of universal cord mounting member 81
To the mounting hole 82 and the mounting hole 8 of the set screw fixing portion 46.
3, a fixing screw portion 84 and a fixing screw portion 85 are respectively provided at positions facing each other.
2 and the mounting hole 83, and the fixing screw portion 84 and the fixing screw portion 85 are aligned and fixed integrally by a mounting screw 86 and a mounting screw 87. At this time, the fixing member attaching portion 63 and the set screw fixing portion 46 both have a substantially U-shaped cross section to have high strength and two contact surfaces 88 and 89 are formed. ing. The fixing member attaching portion 63 and the set screw fixing portion 46 are more firmly fixed because they abut on two surfaces of the abutting surface 88 and the abutting surface 89.

FIG. 5 shows a modification of the method of fixing the fixing member mounting portion 63 and the set screw fixing portion 46. In this modification, the fixing member mounting portion 63 is attached to the U-shaped corner of the set screw fixing portion 46. A hole 90 is provided, and a fixing screw portion 91 is provided in the fixing member attaching portion 63 at a position facing the attaching hole 90 of the set screw fixing portion 46. The attaching hole 90 and the fixing screw portion are provided. In the state of being aligned with 91, they are integrally fixed by a mounting screw 92. The mounting holes 82, 83, 90 may be removed all at once, at which time the fixing will be stronger.

The fixing member attaching portion 63 is a set screw fixing portion 46.
Is arranged on the inner side of the fixing member mounting portion 6
Reference numeral 3 constitutes a wall surface B of the operating unit internal storage chamber 50. Further, as shown in FIG. 7, a fixing plate receiving groove 65 is formed in the fixing member mounting portion 63, and a casing lid stopping plate 60 is arranged in the fixing plate receiving groove 65. As a result, when the casing lid body fixing screw 59 is screwed into the casing lid body retaining plate 60, the rotation of the casing lid body retaining plate 60 is restricted within the range of the retaining plate receiving groove 65. Also,
The fixing member attachment portion 63 is provided with a stop plate holding projection 93, and the casing lid stop plate 60 is provided with an adjusting hole 94 larger than the cross-sectional shape of the stop plate holding projection 93. An adjusting hole 94 is loosely fitted in the protrusion 93. Therefore, the movement of the casing lid stop plate 60 is restricted within the range A in the vertical direction and within the range a in the horizontal direction in FIG. 7. Due to these adjustment holes 94 and the stopper plate holding projections 93, the casing lid stopper plate 60
In addition to being able to perform the rough positioning, the fine adjustment of the position of the casing lid stopper plate 60 can be performed within the ranges A and a. The adjustment hole 94 and the stopper plate holding projection 93 can be formed in any shape such as a circle, an ellipse, or an ellipse.

Next, the procedure for attaching the casing lid 40 to the casing body 27 will be described. FIG. 13 is a diagram illustrating a procedure for attaching the casing lid 40. Figure 1
As indicated by the chain double-dashed line in FIG.
The tubular universal cord attachment opening 78 formed at the end of the casing is passed through the attachment member opening end 96 of the tubular cord attachment portion 95 provided at the end of the universal cord attachment member 81, and as shown in FIG. The locking protrusions 5 provided on the casing lid 40 in the locking grooves 52 provided on the 27.
Insert 3. Next, as shown in FIG. 13, the casing lid 40 is rotated in the C direction around the locking protrusion 53. As a result, the abutment surface 97 of the casing lid 40 and the abutment surface 98 of the casing body 27 come into contact with the engagement groove 52 and the engagement protrusion 53, as shown in FIG. It is firmly attached without rattling with 40. Thus, first, the locking groove 52 and the locking protrusion 53
By fitting and, the assembling work of the casing lid 40 is clarified and the assembling becomes easy.

Next, the casing lid set screw 59 is inserted through the set screw hole 56, the set screw insertion hole 57 and the set screw insertion hole 58 are further inserted, and the casing cover set plate 60 is further provided. It is screwed into the set screw portion 99. In that case, the head of the casing lid set screw 59 abuts on the set screw abutment surface 100 of the cover extension 54, and the casing lid stop plate 60 abuts on the set screw fixing portion 46, so that the cover extension 54 and the cover extension 54 are fixed. The screw fixing portion 46 is screwed between the head portion of the casing lid body fixing screw 59 and the casing lid body fixing plate 60 until it is clamped with a predetermined pressure.
As a result, the cover extension portion 54 of the casing lid 40 is firmly fixed to the set screw fixing portion 46.

Finally, the set screw cover 67 is fitted and embedded in the set screw cover groove 66 of the cover extension 54 to make the outer surface 68 of the cover extension 54 including the set screw cover 67 smooth. In this way, the casing lid 40 is firmly attached to the casing body 27.

As shown in FIG. 4, the tubular cord attachment portion 95 of the universal cord attachment member 81 has an O-ring 1
O-ring holding member 1 for holding 01 and O-ring 102
03 is rotatably inserted. At this time, the O-ring holding member 103 is also fitted in the universal cord attachment opening 78 of the casing lid 40. O-ring 10
1 comes into contact with the opening inner peripheral surface 104 of the universal cord mounting opening 78, whereby a watertight seal is provided between the opening inner peripheral surface 104 and the O-ring holding member 103.

As shown in FIG. 4, the universal cord 4
Is a spiral tube 105 that can form a bendable tube, a blade 106 that is a mesh member that covers the spiral tube 105, and an outer resin layer 107 that covers the upper surface of the blade 106, and a cord body 108. And an attachment member 110 that is attached to the end of the cord body 108 and holds the O-ring 109. The mounting member 110 is the universal cord mounting member 8
It is fitted onto one tubular cord attaching portion 95 and is fixed to the tubular cord attaching portion 95 by a predetermined number of universal cord fixing screws 111. At this time, FIG.
As shown in FIG. 6, a predetermined number (8 in the example shown in FIG. 16) of radial fixing screw holes 112, 112, ... Are drilled in the mounting member 110 at predetermined intervals in the circumferential direction of the mounting member 110. In addition, a predetermined number (four in the illustrated example of FIG. 16) of fixing screw holes 113, 113, ..., which are smaller than the fixing screw holes 112, are provided in the cord attaching portion 95 at predetermined intervals in the circumferential direction of the cord attaching portion 95. Has been drilled. In that case, all the fixing screw holes 113 are arranged so as to be aligned with any of the fixing screw holes 112. Thereby, the mounting member 110
Can be fixed at any position in the rotating direction. In this way, the universal cord 4 is fixed to the cord mounting portion 95. By fixing the cord attaching portion 95 and the universal cord 4, the O-ring holding member 103 has the O-ring holding contact portion 114 formed on the cord attaching portion 95 and the universal cord contact portion 115 of the attaching member 110. It is sandwiched between and held axially.
Therefore, the O-ring holding member 103 is attached to the cord attaching portion 9
It is prevented from getting out of 5.

Further, the break-preventing holding member 116 is externally fitted and inserted on the mounting member 110, and is fixed by being screwed into the mounting member 110 at the break-preventing mounting screw portion 117. This break prevention holding member 1
When the fixing member 16 is fixed to the mounting member 110, the O-ring 109 prevents the break-preventing holding member 116 and the mounting member 110
There is a watertight seal between. At this time, the bending-prevention holding member 116 is also fitted onto the O-ring holding member 103, and the O-ring 102 holds the bending-prevention holding member 116.
The O-ring holding member 103 is watertightly sealed.

Further, a bend preventing rubber 119 which is flexibly fitted on the cord body 108 is integrally provided on the outer periphery of the bend preventing holding member 116 by adhesion or integral molding, and the bend preventing member 14 is formed. ing.

As shown in FIG. 4, for example, an identification color that is identified according to the type of the endoscope 1 is formed between the bending prevention member 14 and the casing lid 40, and the endoscope is visible in appearance. 1
A display ring 120 is provided so that the type of can be discriminated. The display ring 120 is a break prevention holding member 11
6 is fitted on the outside, and when the bending prevention member 14 is screwed to the mounting member 110, the opening end surface 121 of the universal cord mounting opening 78 and the bending prevention member 1
It is held and fixed so as to be sandwiched between the bending prevention end surface 122 of FIG. Also, in this way, the display ring 12
When 0 is fixed, the screwing amount of the break preventing member 14 is determined by the contact positions of the opening end surface 121, the display ring 120, and the break preventing end surface 122.

In this way, the universal cord 4 and the universal cord fixing member 45 have the cord attaching portions 9 at both ends.
5 and the fixed member attachment portion 63 are connected to each other by a universal cord attachment member 81.

By the way, the universal cord mounting member 8
1 is the inner surface B of the fixing member attachment portion 63 as shown in FIG.
Is inclined by an eccentric angle θ ° with respect to the central axis A of the cord mounting portion 95 (which is also the central axis of the universal cord 4). Therefore, when the universal cord attachment member 81 is fixed to the set screw fixing portion 46,
As shown in FIG. 4, the inner surface B of the fixing member mounting portion 63 forms the outer wall surface D of the operation portion internal storage chamber 50, and the central axis A of the universal cord 4 is the inner surface B of the fixing member mounting portion 63.
With respect to (the outer wall surface D of the storage chamber 50 in the operation portion), the housing body 27 is inclined by an eccentric angle θ °. The surface γ is a surface parallel to the inner surface B, and the central axis A and the inner surface B are
The eccentric angle θ of is shown in an easy-to-understand manner.

By thus inclining the inner surface B of the fixing member mounting portion 63 with respect to the central axis A of the cord mounting portion 95, the universal cord 4 approaches the operating portion 3 side, and the operating portion 3 and the universal cord 4 are connected. The angle between and becomes smaller. By the way, the storage chamber 5 in the operation portion 3 of the endoscope 1
0 is a large number of parts for demonstrating the functions of the endoscope 1, such as various switches, air / water supply conduits, light guide fibers, bending operation device 41, and image transmission cable. The internal storage chamber 50 should be made as large as possible, and the operator of the endoscope 1 may use the operating unit 3
Is operated with one hand and the insertion portion 2 connected to the operation portion 3 is operated with the other hand, the operation portion 3 is required to be as compact and easy to operate as possible. However, as the operating section storage chamber 50 becomes larger, the universal cord 4 can be attached so as to project in a direction away from the operating section in the attached state and laterally with respect to the operating section 3. When the operation section 3 is rotated, the radius of rotation of the universal cord 4 becomes large, and the universal cord 4 hits the body to interfere with the operation, resulting in poor operability. Further, although the operating section 3 is held by being held by the palm of the hand, if the universal cord 4 projects laterally with respect to the arm holding the operating section 3, it cannot be operated integrally with the arm, and the operating section 3 cannot be operated. The balance becomes poor when gripped. Further, as the radius of gyration of the universal cord 4 increases, the rotational moment increases, and the force for rotating the universal cord 4 also increases, which further deteriorates the operability.

Therefore, by inclining the inner surface B of the fixing member attachment portion 63 with respect to the central axis A of the cord attachment portion 95 as in the present embodiment, the universal cord 4 can be retained even if the operation portion accommodation chamber 50 is enlarged. Since the angle formed between the operation section 3 and the universal cord 4 can be reduced by approaching the operation section 3 side, it is possible to increase the size of the storage chamber 50 in the operation section, and moreover, the universal cord 4
Is easy to handle, and the universal cord 4 does not get in the way when the endoscope 1 is twisted,
The operability of the endoscope 1 is improved.

As shown in FIGS. 10 and 11, the remote switch 10 provided in the casing body 27 comprises a switch member 123.
Is a cover 124 made of an elastic resin such as silicon rubber which is actually pushed, a switch pedestal 125 integrally formed on the cover 124, a switch body 126,
The diaphragm 12 provided on the upper surface of the switch body 126
7, a rod member 128 provided on the upper surface of the diaphragm 127 to press the diaphragm 127, a switch receiver 129 that holds the lower end portion of the rod member 128, and accommodates the switch body 126, and a rod. Member 1
The cover member 130 is integrally formed with the cover 124 so as to surround the upper end portion of 28. In that case, the switch pedestal 125 is formed integrally with the switch pedestal 125 and the switch receiver 129 by integral molding or adhesion.

The switch operating force applied to the cover 124 is applied to the rod member 12 provided on the upper surface of the diaphragm 127 from the pressing portion 131 provided on the cover 124.
8 and then from the pressing portion 132 of the rod member 128 to the diaphragm 127, the switch of the switch body 126 is turned on. As shown in FIG. 11, when the force P is applied to the side surface of the cover 124,
Although the rod member 128 tends to incline as shown by the chain double-dashed line in the figure, since the rod member 128 is held by the surrounding member 130, it does not largely escape inside the cover 124.

As shown in FIGS. 10 and 18, two contacts 133 for transmitting an ON signal of the switch are provided to project from the α surface of the switch body 126 to the outside, and the cable 134 is preliminarily attached to these contacts 133. It is electrically connected by solder or the like. In that case, there are two cables 134, one of which is used for grounding. Therefore, by connecting a metal member such as the switch pedestal 125, the switch fixing plate 135, and the switch fixing screw 136, which are electrically insulated, to the grounding cable, it is possible to prevent electromagnetic interference during use of the endoscope 1. Has become. If all the metals in the endoscope operation member are connected, the effect will be further enhanced.

The switch member 12 is provided on the casing body 27.
Switch housing 1 consisting of a recess into which the lower end of 3 is fitted
37 is formed, and the bottom surface 137a of the switch housing portion 137 is formed in the same shape as the cross-sectional shape of the cover 124. As shown in FIG. 19, three fixing screw insertion holes 138, 138, ... Are bored in the bottom surface 137a, and three switch fixing screws 136, 136, 136 are provided as shown in FIG. These fixing screw insertion holes 138, 138, ... Are pierced through the switch fixing plate 135 and cantilevered. In that case, two switch fixing screws 136 are arranged from the center and one is arranged at the end portion.
The switch member 123 is fixed to the casing body 27 by 6. In this way, by increasing the switch fixing screw 136 in the center, the strength against the switch member 123 when it is pressed is increased, and the cantilever fixing is ensured. Further, the switch can be assembled only by screw fixing the switch member 123, the switch fixing plate 135 and the switch fixing screw 136, and the switch assembling property is improved.

Further, as shown in FIG. 18, the switch body 1
Two positioning protrusions 139 are provided on the lower surface of the casing 26, and as shown in FIG.
Two storage holes 140 are provided in the housing so as to face the positioning protrusions 139. Further, the contact 133
A communication hole 141 is provided in the elongated hole so that the cable 134 connected to the casing can pass through the casing body 27.
The communication hole 141 and the storage hole 140 adjacent to the communication hole 141 are integrated to form an L-shaped hole.

The switch member 123 configured as described above
When the switch member 123 is assembled to the casing body 27, the switch member 123 is inserted into the switch housing portion 137 from the outside of the casing body 27, and the casing body 27 is inserted between the inside of the casing body 27 and the switch fixing plate 135.
The switch fixing screws 136 (3 places) are screwed and fixed to the switch pedestal 125 so as to be fixed to the casing body 27. In that case, the switch body 126 and the switch receiver 129 are sandwiched between the switch pedestal 125 and the casing body 27, and the switch portion 142 is firmly held. Therefore, the switch receiver 129 and the switch main body 126 are clamped and fixed between the bottom surface 137a and the switch pedestal 125, so that the bonding at the time of assembling the switch members may be weak, such as temporary fixing.

Further, as shown in FIG. 10, a locking projection 143 is provided on the side surface of the lower end portion of the cover 124 over the entire circumference, and the locking projection 143 is provided on the switch member 123.
When it is attached, it is deformed and housed in the switch housing 137 to urge the side surface of the switch housing 137. As a result, the switch member 123 is prevented from rattling, and a watertight seal is provided between the cover 124 and the side surface of the switch housing 137.

As shown in FIG. 10, the switch receiver 129
Has a protective wall 144 on the side where the suction tube 31 is provided. As shown in FIG. 20A, the protection wall 144 is formed as a part of a columnar shape, and ribs 145 are provided at both ends of the protection wall 144, and the strength of a part of the protection wall 144. Is increasing. . And FIG.
As shown in 0, the protective wall 144 is provided so as to cover the inner circumference of the cover 124. And the protection wall 144
Also prevents the switch member 123 from being accidentally operated when the suction tube 31 is run. When the switch is operated, since it is performed from the side opposite to the bending operation portion mounting portion 43, even if the protective wall 144 is provided, there is no problem in operating the switch.

Further, as shown in FIG. 20B, two contact points 146 are provided on the β surface opposite to the α surface of the switch body 126 similarly to the α surface, but they are not used.
The tip is cut, and a contact cutting trace 147 is left on the β surface.

As described above, the switch body 126 is housed and fixed in the switch receiver 129.
The α surface side of the switch receiver 129 is the cable 134 and the contact 1
The open end 149 is formed to facilitate the connection with 33, and the β surface side of the switch receiver 129 is formed as a closed end so that the fixing is made firm. A contact escape groove 150 is provided at the closed end so that the contact cutting trace 147 does not hit.

As shown in FIG. 3, the remote switch 10
On the bending operation device side, a suction tube 31 connected to the suction control device 8 is provided so as to travel. If the suction tube 31 does not travel smoothly and is broken, the suction performance is deteriorated. Therefore, the switch member 123 has a tube guide portion 15 having a rounded shape with no corners so that the suction tube 31 can smoothly travel.
1 is formed. FIG. 19 shows a guide portion shape 151a provided in the switch storage portion 137.

FIG. 21 is a diagram showing a second embodiment of the present invention. The same components as those of the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted. In the above-described first embodiment, the fixing member attachment portion 63 of the universal cord attachment member 81 is fixed to the inner surface of the set screw fixing portion 46, but in the second embodiment,
As shown in FIG. 21, the fixing member attaching portion 63 is fixed to the outer surface of the set screw fixing portion 46. As a result, the outer wall surface D of the operation part internal storage chamber 50 is formed by the inner surface G of the set screw fixing part 46. This set screw fixing part 46
The outer surface F of the universal cord 4 is formed to be parallel to the central axis A of the universal cord 4, and
The inner surface G of 6 is inclined with respect to the outer surface F by an eccentric angle θ °.

By constructing the second embodiment in this way, in the second embodiment, not only the same effect as the first embodiment can be obtained, but also the universal cord mounting member 81 is eccentric. The universal cord mounting member 81 can be easily processed. Moreover, the inner surface G of the set screw fixing portion 46 has an eccentric angle θ.
Since it is inclined at an angle of 0 °, the storage space 50 in the operating portion can be formed wider accordingly.

FIG. 22 is a diagram showing a third embodiment of the present invention. The same components as those of the first and second embodiments described above are designated by the same reference numerals, and detailed description thereof will be omitted. In the above-described second embodiment, the inner surface G of the set screw fixing portion 46 forming the outer wall surface D of the operation portion accommodation chamber 50 is formed as one surface, and is eccentric with respect to the central axis A of the universal cord 4. Although it is inclined by an angle θ °, in the third embodiment, the inner surface of the set screw fixing portion 46 forming the outer wall surface D of the operation portion inner storage chamber 50 is parallel to the central axis A and has a step. Some faces G ₁ , G ₂
Are formed on two surfaces. Therefore, the outer wall surface of the storage chamber 50 in the operation portion is also formed into two surfaces parallel to the central axis A and having steps D ₁ and D ₂ .

In the third embodiment, the substantial outer wall surface of the operating section internal storage chamber 50 is a point K on the operating section 3 side of the universal cord fixing member 45 and a point on the universal cord 4 side of the universal cord fixing member 45. It becomes a surface E formed on a straight line connecting L, and this surface E is inclined with respect to the central axis A.

By thus configuring the third embodiment, the same effects as those of the first and second embodiments described above can be obtained in the third embodiment. The surfaces G ₁ and G ₂ do not necessarily have to be parallel to the central axis A and may be inclined with respect to the central axis A. The surfaces B ₁ and B ₂ may be curved surfaces. Further, the surfaces B ₁ and B ₂ may be two or more surfaces, and can be applied to the first embodiment shown in FIG. 4 and the fourth embodiment shown in FIG. 23 described later.

FIG. 23 is a diagram showing a fourth embodiment of the present invention. The same components as those of the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted. The fourth embodiment has substantially the same structure as the above-mentioned first embodiment, but in the fourth embodiment, as shown in FIG. 23, a cover having a concave portion 70 for lightening is formed. The inner surface 152 of the expansion portion 54 is located inside the fixing member attachment portion 63 and the set screw fixing portion 46. Due to the inner surface 152 of the cover extension portion 54, the operation portion internal storage chamber 5
An outer wall surface D of 0 is formed.

With the construction of the fourth embodiment as described above, in the fourth embodiment, not only the same effect as the first embodiment can be obtained, but also the casing lid 40 is formed by molding. Therefore, the cover extension 54
The inner surface 152 can be formed into a free shape according to the shape of the built-in object. As a result, the inner surface 152 of the cover extension portion 54 can be prevented from being broken due to interference between the built-in objects.

Further, by forming the recess 70 large, the space between the two casing cover set screws 59 is widened, and the contact area between the set screw fixing portion 46 and the fixing member mounting portion 63 can be increased. .

[0064]

As is apparent from the above description, according to the present invention, the casing body is sandwiched between the second fixing member and the supporting member of the casing body, and the casing body and the casing lid body are brought into contact with each other. Since only the contacting force acts on the casing, the casing body and the casing lid are not deformed or damaged. Therefore, watertightness between the casing body and the casing lid can be ensured. Further, since the second fixing member is provided so as to be displaceable by a predetermined amount, the second fixing member can prevent an assembly error due to variations in dimensions of assembly parts such as the casing body and the casing lid and deformation during assembly. It can be absorbed by displacing it. Therefore, the casing lid can be reliably fixed by the second fixing member, and the assembly is facilitated.

[Brief description of drawings]

FIG. 1 is an overall conceptual diagram showing a first embodiment of an endoscope according to the present invention.

FIG. 2 is a diagram showing an operation unit of the endoscope in the first embodiment.

FIG. 3 is a top view of an operation unit according to the first embodiment.

FIG. 4 is a cross-sectional view showing a structure for connecting the casing body, the casing lid, and the universal cord 4 to each other in the first embodiment.

FIG. 5 is a cross-sectional view showing a mounting structure of a cover expansion portion, a set screw fixing portion, and a fixing member attaching portion in the first embodiment.

FIG. 6 is a top view showing a mounting state of a casing lid stopper plate in the first embodiment.

FIG. 7 is a bottom view showing a mounting state of a casing lid stopper plate in the first embodiment.

FIG. 8 is a view showing an arrangement state of a packing stopper for packing that seals between the casing body and the casing lid.

FIG. 9 is a perspective view of a packing that seals between the casing body and the casing lid.

FIG. 10 is a cross-sectional view showing a mounted state of a remote switch.

FIG. 11 is a cross-sectional view showing a mounted state of a remote switch.

FIG. 12 is a cross-sectional view showing a mounting structure of a cover expansion portion, a set screw fixing portion, and a fixing member attaching portion in the first embodiment.

FIG. 13 is a diagram illustrating a procedure for attaching the casing lid to the casing body in the first embodiment.

FIG. 14 is a partially enlarged cross-sectional view illustrating a procedure for attaching the casing lid to the casing body in the first embodiment.

FIG. 15 is a partially enlarged cross-sectional view illustrating a procedure for attaching the casing lid body to the casing body in the first embodiment.

FIG. 16 is a cross-sectional view illustrating the attachment between the attachment member and the tubular cord attachment portion of the universal cord attachment member in the first embodiment.

FIG. 17 is a sectional view of a universal cord attachment member in the first embodiment.

FIG. 18 is a perspective view of a switch body.

FIG. 19 is a view showing the bottom of the switch body storage section.

FIG. 20 is a perspective view of a switch receiver in the switch body.

FIG. 21 is a partial sectional view showing a second embodiment of the present invention.

FIG. 22 is a partial sectional view showing a third embodiment of the present invention.

FIG. 23 is a partial sectional view showing a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Endoscope, 2 ... Insertion part, 3 ... Operation part, 4 ... Universal cord, 13 ... Connector, 27 ... Casing main body, 4
0 ... Casing lid body, 45 ... Universal cord fixing member, 46 ... Set screw fixing portion, 54 ... Cover extension portion, 59
... Casing lid set screw, 60 ... Casing lid set plate, 63 ... Fixing member mounting portion, 81 ... Universal cord mounting member

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[Procedure amendment]

[Submission date] February 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

As shown in FIG. 9, the packing 73 is formed in a three-dimensional shape such that the packing 73 shifts from side to side on the front side from the upper side to the lower side. As will be described later, when the packing 73 is mounted around the suction control device mounting hole 80 provided in the casing lid 40, the packing 73 is deformed and mounted.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

FIG. 5 shows a modification of the method of fixing the fixing member mounting portion 63 and the set screw fixing portion 46. In this modification, the fixing member mounting portion 63 is attached to the U-shaped corner of the set screw fixing portion 46. A hole 90 is provided, and a fixing screw portion 91 is provided in the fixing member attaching portion 63 at a position facing the attaching hole 90 of the set screw fixing portion 46. The attaching hole 90 and the fixing screw portion are provided. In the state of being aligned with 91, they are integrally fixed by a mounting screw 92. The mounting holes 82, 83, 90 may be provided at one time, at which time the fixing will be stronger.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0045

[Correction method] Change

[Correction content]

As shown in FIGS. 10 and 11, the remote switch 10 provided in the casing body 27 comprises a switch member 123.
Is a cover 124 made of an elastic resin such as silicon rubber which is actually pushed, a switch pedestal 125 integrally formed on the cover 124, a switch body 126,
The diaphragm 12 provided on the upper surface of the switch body 126
7, a rod member 128 provided on the upper surface of the diaphragm 127 to press the diaphragm 127, a switch receiver 129 holding the lower end portion of the rod member 128 and accommodating the switch main body 126, and a rod. Member 1
The cover member 130 is integrally formed with the cover 124 so as to surround the upper end portion of 28. In that case, the switch base 125, the switch receiver 129, and the switch body 126 may be integrally formed by adhesion.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (1)

[Claims] 1. An endoscope operating mechanism, a casing body that covers the endoscope operating mechanism and has an opening in a part thereof, a casing lid that closes the opening of the casing body, and a casing. In an endoscope including at least a universal cord protruding from a lid, a supporting member fixed to the casing body, and displaceable relative to the supporting member in a direction perpendicular to the opening direction, and A first fixing member disposed on the support member so as to be locked in the opening direction, and the first fixing member in cooperation with each other, so that the casing lid is fixed to the first fixing member. And a second fixing member that is clamped between the endoscope and the second fixing member.