JPS5934238A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope with an improved assembly structure of an operating section.

As shown in Fig. 1, the assembly structure of the operating section in a conventional endoscope has (two operating section main bodies; h, h
be fixed with screws using pins etc.
Vf (it could only serve as a casing to which two sets of C were attached).

However, the periphery C2 of the thread body a in the imitation part 3 has a bending operation wire, a treatment instrument guide; tp, a + child raising wire, an air supply and
Built-in components C... such as the water supply duplex, various channels, and external air wiring are arranged, and in this part, there are two types: one from the push-in part, and one from the eyepiece part or the connector to the attached device. For reasons of bonding, the substrate a cannot have a large cross-sectional modulus, and its cross-sectional shape is about the shape of a square square, as shown in FIG.

Therefore, in order to ensure strength against compression and bending, the operation part had to be thin and thick.In other words, the operation part of the endoscope, which is held with one hand and operated for a long time, had to be made thin and thick. It was inadequate.

The present invention was developed in view of the above-mentioned circumstances (2), and its purpose is to meet the most necessary conditions for an operating section of an endoscope that can be held with one hand for a long period of time, such as being light and small. Another object of the present invention is to provide an endoscope having an operating section having a structure that provides sufficient strength.

Is the following an IC of the present invention? Examples are shown in Figures 2 to 14 C.
I will explain based on two things.

FIG. 2 schematically shows the entire endoscope. The endoscopic casting is composed of a push-in part 1, an operating part 2, and a light guide cable 3.

The above-mentioned operation g1-2 is composed of a sweeping section body 4 as shown in FIG. 3 and a casing 5 made of a synthetic resin material that covers and encloses the sweeping section body 4. Furthermore, the casing 5 is divided into two parts: a casing main body 6 with a box-like rectangular cylindrical inner wall and a cylindrical gripping cover 7;
C:fJp is matched so that it can be sent continuously. and,
The casing body 6 includes an eyepiece section 8 and an air/water supply control member 9.
, a suction control knob 11 and a curved rectification knob 12 are provided. In Fig. 2, 108 is the intermediate joint of the air/water supply tube, 1 ohm.

10h is the middle part of the suction tube 54. The intermediate joint portion 10a of these.

1θb and 10h are V, and the deviation is also inside the grip cover 7 (2).Moreover, the portion C2 of the casing body 6 on the opposite side from the bending operation knob 12 is formed with an inclined surface 13, and this The inclined surface 13 is provided with an opening 14 located opposite to the operating section main body 4. This opening 14 (the second opening 14 is closed by a casing lid 15 made of a synthetic resin material). The base end of the light guide cable 3 is connected to the casing lid 15.

Therefore, the fixing structure of the casing mounting body 15 to the two casing bodies 6C and the connection structure of the light guide cable 3 to the two operating part bodies 4C will be described in detail based on FIGS. 5 and 6C. A fixing metal fitting 17 is provided on a plate surface of the operation section main body 4 facing the opening 14. As shown in FIG.

The material of this fixture 17 is, for example, JI80f720P.
, 05211P, 02680P, 02800P.

It is formed by pressing a thin metal plate such as A3052P, 5POO, 5U83040P, and is integrated with the top plate part 18 and this top Fj part 18 (3
It is composed of book support legs 19... Furthermore, a bent portion 19m is formed at the tip end (2) of the supporting leg portion J9, and each bent portion 19aC2 is a mounting hole 19 into which a fixing screw 20 is loosely inserted via a spring washer 20a.
b is drilled. The fixing fitting 17 is fixed to the operating section main body 4C by the fixing screws 20. Therefore, the upper parts of the top plate part 18 and support legs 19 of the fixture 17 protrude from the opening 14 of the casing body 6, and the top plate part 18 and support legs J 9 , J i9 protrude from the opening 14 of the casing body 6. 'c.

Attachment holes 21... are drilled at different angles. A proximal end portion of the light guide cable 3 is connected to this fixture 17. That is, the light guide cable 3 includes a flexible tube 22 for internally holding elongated members such as a light guide fiber f, a fluid transport tube t, and an electric cable.
and a base tube 23 fitted to the end of this flexible tube 22, the proximal end of this base tube 23 (2 is provided with a notch 24, and the notch 24 (2 is provided with the fixing fitting 17) The mounting holes 21... and the opposing screw holes 25... are bored and aligned.Then, the fixing screws 26... that pass through the mounting holes 2... are inserted into the screw holes 25... Screwing in (2) Integral (2) Fixed.

Further, an anti-bending rubber tube 27 is fitted to the base end of the flexible tube 22, and a cap 28 is screwed into the open end of the tube. Further, a base end portion of a tightening ring 29 is screwed and electrically fixed to the base 28 . This tightening ring 29 projects from the end surface of the anti-bending rubber tube 27, and a first annular 1%' is formed on the inner peripheral surface of this projecting portion.
30, a second annular groove 31 is provided on the outer peripheral surface.

And this first one. The second annular groove JO, 31 is adjacent to the tightening ring 29 in the axial direction. The second annular groove 30, 31 accommodates an elastic sealing member 32, 33 consisting of an O-ring. Furthermore, the first. A stepped portion 34 is provided on the outer circumferential surface between the second annular grooves 30 and 31, and a female screw portion 35 is carved on the inner circumferential surface C corresponding to the second annular groove 31. This female threaded portion 35 is connected to a male threaded portion 36 carved on the outer peripheral surface of the upper IR protection tube 23.
(The two are screwed together.

Further, a tightening annular portion 37 having a horizontal cross section is integrally provided on the proximal end surface of the tightening ring 29, and is adapted to engage with the casing lid 15.

Furthermore, the opening 14 provided in the inclined surface 13 of the casing body 6 has a rectangular shape, and this m10 portion 14
An inclined pressure receiving portion 38 is provided on the inner peripheral edge of the pressure receiving portion 38 . Also,
The casing lid 15 is C-shaped so as to close the opening 14.
It has two sets of shapes, and an inclination suppressing part 39 is provided on the outer peripheral edge thereof to join with the above-mentioned inclination pressure receiving part 38. 2. The outer circumferential edge C of the inner elevation I of this inclined pressing part 39:
A protrusion 40 is provided to protrude along the protrusion 40, and an elastic sealing member 41 made of a QIJ ring is fitted on the outside of the protrusion 40 to provide a watertight seal between the inner peripheral surface 7 of the casing body 60. Further, on the outer surface of the casing lid 15, a rectangular fitting tube 42 is integrally protruded and fits into the fixing fitting J7. ≦Second is the circular h-joint part 43 placed on the outer periphery of the above-mentioned tightening +1 ring 29
is provided, and a step part 44 is formed at the end of the itJO, which faces the step part 34C of the tightening ring 29. Furthermore, C2, the upper front of the inner layer surface of the fitting cylinder 42: the part facing a part of the tightening annular part 3 (2 is provided with the inner circumferential protrusion 45).

An engaging notch 46 that engages with the tightening annular portion 37 is formed in the inner circumferential protrusion 45 .

Next ζ2, C2 fixed operating part main body 4 inside the casing 5
An assembly method for quickly connecting the light guide cable 3 to C2 will be described. Insert the fixing fitting 17 from the opening J4 of the casing body 6.

The support legs 19... are tightened and fixed to the operating section main body 4 using the fixing screws 20... (2). Since it is formed from a large diameter hole that can be loosely inserted, the fixed metal JQ, 1
7 in a unique position relative to the operation unit main body 4 (two-tone %1 Machi Sho/
can be identified. What is the installation rate of light guide cable 3? , 2 (-position the top plate part 18 of the fixing metal fitting 17 at the proximal end of the cap tube 23 (-) provided, and fix the cap tube 23 and the fixing metal fitting 17 in one direction C211 with the fixing screws 26... In this case, even in C2, the above 1C1
Since the fixed metal ← 517 is made of a solid metal plate, it must be plastically deformed (a secondary tube for positioning the two-way cap tube 23 is created, and the fitting tube 42 of the casing fish body 15, which can be removed later), is deformed plastically. On the other hand, after attaching the elastic seal member 41 to the protrusion 40 of the casing lid 15, the fitting tube 42 of the casing lid 15 is attached to the flexible tube 22 (-) of the light guide cable 3. Then, the casing lid J5 is moved in the direction of the casing body 6, and the fitting tube 42 covers the fixing fitting 17.
is joined to the inclined pressure receiving portion 38 of the casing body 6 to close the opening 14. Next C21 elastic seal member 32゜33
The light guide cable 3 is connected to the light guide cable 3 by attaching the tightening ring 29 equipped with the clamping ring 29 and the anti-bending rubber tube 22 folded integrally with the clamping ring 29.
Fits into the 0-town flexible pipe 22.

The female threaded portion 35 of the clamping ring 29 is screwed into the male threaded portion 36 and tightened. In this case, since the axial center 15m of the light guide cable 3 and the axial center 42a of the fitting tube 42 are eccentric by α, the elastic seal member 33 is aligned with the axial center 15s in the bending direction by tightening the tightening ring 29. In other words, it applies a force in the direction of arrow A. Roughly speaking, since the tightening annular portion 37 of the tightening ring 29 engages with the engagement notch 46 in the inner circumferential protrusion 45 of the fitting tube 42, tightening of the tightening ring 29 causes an arrow to appear on the inner circumferential protrusion 45. Gives a force in the P direction. Therefore, the casing lid body 15 and the casing body 6 have an inclined receiving part 381:
On the other hand, the inclination suppressing portion 39 is joined and in close contact. Note that although the elastic seal member 33 is biased due to the tightening of the clamping member 29, the C is designed so that the seal is ensured even if the elastic seal member 33 is biased to the maximum extent that allows the clearance between the clamping ring 29 and the casing lid body 15.
The tightening ring 29 and the casing lid 15 are completely watertightly sealed by the elastic seal member 33, and the casing body 6 and the casing lid 15 are watertightly sealed by the elastic seal member 41.

- The above-mentioned grip cover 7 has an outer diameter and length suitable for the examiner to grip with one hand, and the side surface C of the end on the side of the insertion part 1 is shown in FIGS. 7 and 8. As shown, the mounting portion for mounting the channel body 47 is integrally formed with the cylindrical portion 48. That is, in this installation, Vi is attached to the cylinder part 48.
The channel body 47 can be inserted and removed from the outside C: When it is fitted, as shown in FIG.
1.51. Further, as shown in FIG.
The channel tube 53 is connected to c2, and the other end c
A suction tube 54 is connected to the second part. In other words, this portion serves as the intermediate connecting portion 10b that connects the channel tube 53 and the suction tube 54 to the three-way joint 52 (two pairs).

By the way, the 4y working part main body 40. which is inserted into the inside of the cage holder 5. As shown in FIG.
6. It is made of wood from a pair of frames 57 and a cylindrical body 58. More specifically, the insertion portion 1 gI+ of the main plate 56
A pair of bent pieces 59.59 are formed at the ends of the frame 57.57, and a pair of frames 57.57 are formed for each bent piece 59.59.
Each end of the frame 5 is connected with a screw, and the frame 5 is connected with a screw.
7. Each other end of the porcelain body 58 is secured with two screws on one side of the ceramic body 58. The base plate 56 is arranged across the casing body 6 and the grip cover 2.

The frame 57.57 is disposed within the gripping cover 7, and the cylinder 58 is arranged to extend and protrude from the open end portion of the gripping cover 7.

Then, as shown in FIG. 8, the ceramic body 58 (second is n11
The three-way pipe joint 52 is fixedly attached by set screws 61, 61. Further, an insertion portion 1 is provided at the extending end of the cylindrical body 58.
The proximal ends 62 of the flexible tubes are connected by a retaining ring 63. Furthermore, a stopper 65 made of a relatively hard elastic material is connected to the cylindrical body 58 via a connecting pipe 64. Further, a cylindrical watertight cover 66 is fitted on the outside of the cylindrical body 58, and one end of this watertight cover 66 is connected to the grip cover 7.
Part of the opening end of the pipe is inserted into the watertight (the two are connected).

The other end of the watertight cover 66 is the end surface of the snap stop 65 (the two are joined together).

Between the joint between the watertight cover 66 and the grip cover 7.

Between the joint between the watertight cover 66 and the cylindrical body 58 on the push-in part l side;
Ring-shaped elastic backings 67 are interposed between the cylindrical body 58 and the M end of the insertion portion 1, respectively, to ensure watertightness between them.

Furthermore, as shown in FIG. 8, the inner circumferential surface C2 of the opening of the insertion portion J 1111 of the grip cover 7 has a burnt portion 68 consisting of an annular protrusion protruding toward the center over its entire circumference.
is formed. And this receiver is Aii in part 68.
The circumferential surface of the recording cylinder 58 (the nut-shaped tightening member 71.71 screwed into the external thread 69 formed in the second part) is in contact with the member 7, and the tightening is performed by the member 7.
By advancing 1.71 toward the grip cover 7 (ill), the grip cover 7 can be suppressed, and as a reaction, the operation section main body 4 is pulled.

On the other hand, the other end of the 8 yen Sakubu Mokukyu 4, the tsuzun, and the sacral end of the ladder part 8 of the main plate 56 is a pair of members, such as metal bodies 72 and 7.9.
The attachment is fixed to the side wall 74 of the casing body 6 using the first screw. That is, a pair of metal bodies 72, 7 ;? A set screw 75 that inserts into the side wall 74 and passes through this king.
... and nut 76... are used to secure the opening.

Note that the inner metal body 72 has one side C formed on the piece 7.
7.77 is screwed to the ground Pjse. Also, the first
As shown in FIG.

Furthermore, the caning body 6 of the casing 5 and the gripping cover 7 are connected to each other as shown in FIG. That is, the casing body 6c2 protrudes from its insertion end surface 78 toward the grip cover 7, and is formed with a protrusion 79 corresponding to the opening shape of the grip cover 7.
is fitted into the 14th opening end of the grip cover 7. Also, the inner circumferential portion of the opening 1 of the grip cover 7 into which the protrusion 79 is fitted has a large diameter C according to the thickness of the protrusion 79. 2 are formed to form a stepped portion 80.

A protrusion 8+7a that protrudes into the casing body 6I1 is formed at the tip f2 of the rising wall of this stepped portion 8θ, and a protrusion 79
A protrusion 79m is formed corresponding to the tip (2) of each protrusion 79a.

1jOa is designed such that the bottom side of the stepped portion 80 is sloped, and a ring-shaped elastic backing 81 is fitted into the gap surrounded by the stepped portions 80.

On the other hand, as shown in FIG. 9, a bending operation mechanism as an operation mechanism is attached to the base plate 56 of the operation section 4. That is, the casing body 6c of the base plate 56
A fixing part 82a of the shaft 82 is provided on the upper surface of one end side where the shaft 82 is located, and the shaft 82 is provided in a protruding manner. One end of each sleeve 8, ?, 84 is engaged with a pair of rotatable sprockets 85, 85 (only 10,000 shown in the figure) located at the top C2 in the axial direction of the shaft 82, respectively, The other end protrudes from the casing body 6 and is connected to the curve 4 and the operation knobs 1z and x2 (only one is shown).The other end protrudes from the inside of the grip cover 7 of the base plate 56, C2. , a partition member 86 having a U-shaped cross section is fixed along the longitudinal direction of the substrate 56 by a presser plate 87 via its intermediate side.The outer sides C2 of both sides of this partition member 86 are as follows. Partition wall 88
. . . upper and lower two stages (two passages 89 . . . ) are partitioned. The partition walls 88 . . .
b, and each partition wall 88a, 88b has its middle part in the longitudinal direction and the end part on the sprocket 85 side connected to the board 5.
6 (supported and fixed to the first and second supporting parts 90a and 90, which are double-sided).

Anti-sprocket of upper L' bulkhead member 86) 851111
A mounting plate 91 is erected on the end face of the mounting plate 9.
A flat root-shaped holding member 92 having a width larger than that of the partition wall member 86 is bonded and fixed to the partition wall member 86 .

One end of the holding member 92 in the width direction (two notches 93 are formed in correspondence with the passages 89, respectively). A hollow cylindrical regulating member 94 in which a stepped portion 94a is formed is provided in such a manner that movement in the axis]j direction is regulated by engaging the stepped portion 94tx. The end portion C2 of the partition wall 88h holds the partition wall 88h so that it does not come off the notch 93.Furthermore, the regulating member 94 includes a flexible coil made of a tightly wound coil or the like that is inserted over the entire length C2 of the insertion portion 1. The base end of the wire guide vibe 95 is fitted into the soldering member 96s, and the soldering member is fixed by the soldering material 96s.A wire 96 is inserted through the wire guide pipe 95 (the second wire 96 is inserted into the wire guide pipe 95). The pieces (not shown) constituting the section (two pieces are connected and fixed, and the proximal end side is guided through the passage 89 (two pieces). An end of a chain 98 whose middle part is engaged with the sprocket 85 is connected to this connecting member 97. A collision member 99 is connected to the connecting member 97 in a state perpendicular to the axis of the wire 96. A portion of this collision member 99 protrudes outward in the width direction of the ground h56, and the outer peripheral surface of this protruding portion forms an acute angle with the end surface thereof at a slope 100.
(There are two formations.

On the other hand, between the base plate 56 (the first support part 90g and the second support part 90 which are installed vertically), there is a wall part 101 formed by bending a part of the base plate 56 or a separate member into an L-shape. A support hole 102 is provided on one side c2 of the wall portion 101 along the width direction key of the main plate 56, and a support hole 102 is provided in the support hole 102 between the screw portion 103n and the head portion 103h. Part 103
A screw 10.9 having a diameter c is rotatably supported via a portion 103c.

That is, this screw I O,9 has its axis line connected to the wire 96.
The screw fflK10.9 is provided parallel to the axis of
The end of a is connected to the support hole 10 formed in the second support part 9o.
4 (Two engagements. This screw 10, ? threaded part 1
A stopper 105 is screwed onto 03m. The height of this stopper 105 is formed to be slightly smaller than the height of the passage 89, so when the screw 10B is rotated, the stopper 105 moves forward and backward in the passage 89 without rotating. ing. Note that the passage 89 in the portion where the screw 103 is provided is defined by an outer partition y2 g g h. The partition wall member 86 side of the stopper 105 (one side C facing - is formed with a slope 106 having an angle corresponding to the slope 100 of the collision portion vU99, and the collision member 9 is formed on the slope 106 of the stopper 105.
The slope 40 of No. 9 collides with the wire 96, i.e.,
The maximum bending angle of the curved portion in the upper left and right directions is regulated.

On the other hand, the head lθ3b of the screw 103 is provided with an engagement hole 107 extending through it in the radial direction l2. This engagement hole 107 has a locking spring 10 made of a wire bent into a wave shape.
B is provided with one end engaged. Further, the other end of the locking spring 10B is in pressure contact with the first support portion 90m in a compressed state. Therefore, the above screw 1
03 is regulated by a locking spring 10B, and one rotation is regulated.
Further, the end surface of the head 703h is brought into pressure contact with the side surface of the wall portion 101 by the restoring force of the locking spring 10B, and movement in the direction of removal from the support hole 102 is restricted.

In the bending operation a disease configured in this way, the insertion section 1
When the sprocket 85 is rotated by the bending operation knob 12 to make the curved part of the curved A curve, and the chain 98 is made to run normally, one passage 89911 in the width direction of the main plate 56 is rotated.
The wire 96 on the other side of the passage 89 is pushed. Therefore, the above curved portion +-j:
H will be curved in the direction of the wire 96 being pulled. Then, when the wire 96 is roughly towed, the slope 100 of the collision portion tr (99) provided on the connecting member 97 connecting the base end of the wire 96 and the chain 98 collides with the slope 106 of the stopper 105. , wire 96
It becomes impossible to tow the vehicle any further. That is,
The maximum bending angle of the bending portion is regulated by the stopper 105 . In addition, when the collision part (material 99 collides with the stopper 105), the screw 103 is pressed toward the second support part 90 via the stopper 105. The end face of 103b is wall part 1
01, and this contact (therefore, the stopper 10
With 5, displacement movement in two axes is prevented.
There is a great danger that the maximum bending angle of the bending section will become larger than the initially set angle.

On the other hand, in order to change the maximum bending angle of the curved part, the locking spring 108 provided in a compressed state between the first support part 90m and the engagement hole 107 of the head 103h of the screw 103 is completely compressed. Remove it by doing this. Next, turn the screw 10.9 to shift the stopper) 05 toward the second support part 90, and then rotate the bending operation knob J2 to bend the bending part until it reaches the desired bending angle. In this state, the bending operation knob 12 is fixed, and the screw 1o3 is rotated in the opposite direction until the slope 106 of the stopper 105 contacts the slope 100 of the collision member 99.Then, the first screw 1o3 is rotated in the opposite direction.
If the locking spring 108 is again provided between the support portion 9θ8 and the engagement hole 107 of the head 70.9h of the screw 10, 9, the stopper 105 can be fixed in a predetermined position via the screw 103. (Since this is the case, the maximum bending angle of the bending portion is set by this stopper 105.

The engagement hole 107 (f2 for engaging the end of the second locking spring 1011) may require the screw 108 to be rotated slightly from a predetermined position, but the pitch of the screw 103 should be made sufficiently small. If this is done, the slight rotation of this screw 103 will hardly move the stopper 105, so the maximum bending angle C2 of the bending portion will not be affected.

By the way, the protruding tips C of each of the first support parts 90 and 90 are
Second, as shown in FIGS. 11 and 13, stopper members 111 and 11 serve as stoppers for preventing deflection, respectively.
2 is installed. Each of the stopper members 111 and 112 for preventing deflection is made of a synthetic resin material, and is attached by screwing into a screw hole 104 formed in the support portion 90 and 90. The deflection prevention stopper members 111 and 112 are in contact with the inner wall surface of the casing 5, in this embodiment, the inner wall surface C of the casing body 6. Further, as shown in FIG. 4, a stopper piece 113 as another stopper for preventing deflection is fixed with screws to the base plate 56, located on the opposite side from the stopper members 111 and 112$J for deflection prevention. As shown in FIG.
.

1120 (inner wall surface on the opposite side to the inner wall surface on the side to which it abuts). Wow, this deflection prevention stopper members 111, 112 and stopper piece 113 are the first
As shown in FIG. 3, it is preferable that C2 be arranged on a plane perpendicular to the plate surface C2 of the C2 ground root 56 (substantially 1:). In addition, when the curved sweeping mechanism was imitated (1,000), a stopper piece 113 was provided on the side where the operating section main body 4 was bent and expanded, and the above-mentioned deflection prevention stopper members 111 and 112 were also provided.

And, these deflection prevention stopper members 11), 112
The tips of the stopper pieces 1 and 3 are provided so as to always abut against the inner wall of the casing body 6. Therefore, even if the operation section main body 4, especially the base plate 56, tries to bend during its bending operation (2), this is prevented.Of course, this deflection can be prevented by moving backward. Although there is an effect due to the tensile force acting on the stopper member xx1, 112b and the stopper piece 113, this can be completely prevented by making the operation section main body 4 thinner and the combination H2. There is also an effect that it becomes possible to configure the structure.However, the stopper part) fA
ll, 112 and the stopper piece 113 apply only a very slight stress to the two casing bodies 6c due to contact, and no undesirable concentrated stress is applied. It should be noted that, as in this embodiment, it is not always necessary that the deflection prevention stopper members 111, 112b and the stopper pieces i, q are in close contact with the inner wall of the two-cage saw body 6. It is also possible to provide a distance such that the main body 4 comes into contact with the main body 4 when it is slightly bent.

Therefore, the assembly structure of the operating section 2 is such that the casing main body 6 in the shape of a middle box and the cylindrical gripping cover 7 are joined together to form the cylindrical casing 6 as raw material. An operating section main body 4 is inserted into the interior of the casing 5, and both ends of the casing 5 are supported by the operating section main body 4 so as to apply a tensile force to the operating section main body 4. Qualitatively, the end of the operation section main body 4 on the eyepiece section 8 side is connected to the 11I of the casing main body 6 using a pair of metal bodies 72 and 73.
The mounting is fixed to the l wall 74.

The cylindrical body 58 at the end of the operating section main body 4 on the insertion section 1 side is shown in a state in which the clamping member 71 is held and pressed against the receiver section 68 of the cover 7, and the operating section main body 4 receives a tensile force while ,
Resing 5 reduces the compressive force as a reaction. During this time, the intervening elastic backing 81 is compressed to ensure watertightness between the casing body 6 and the gripping cover 7.

By the way, the casing 5 resists compression (deflection, buckling and bending), and in particular, is formed into a cylindrical C plate that occupies the outermost shell of the operating section 2. Therefore, the casing 5 can be made thin and light, and is strong against compression and bending.On the other hand, the operating section main body 4
Since it has a structure that reduces tensile force, it can be made thin and thin by being made of metal, for example. Damn it, operation part 6 main body 4
Even if it is thin and thin, it can still have sufficient tensile strength (2), so the operating section main body 4 can be made more compact.Furthermore, since the operating section main body 4 always has tensile stress, the operating section 2 can have sufficient tensile strength. When compressive force is applied, this is offset.

Moreover, since the operating section main body 4 always has tensile stress, it has a stronger resistance to bending than a case without this tensile stress.

Furthermore, when the casing body 6 and the grip cover 7 try to bend away from each other at their contact surfaces as shown by the two-dot chain line in FIG. Although it is necessary to increase the length (QP (CJR)), as described above, with the structure C2, there is less bending and flaring of the operating section main body 4, so that change is suppressed.

Therefore, bending between the casing body 6 and the gripping cover 7 is also prevented! do. Due to the above two effects, the rod section 2 has sufficient strength against tension C2 (not only can it be thin and light), but also has sufficient strength against compression and bending C2.

In the conventional structure, when trying to obtain sufficient strength by compression and bending, the operation part 2 became thick and heavy, and it also required excessive strength against tension, resulting in waste. Now, the cross-section selection and weight distribution can be changed by reducing the portion of the operation part body 4, which is not convenient for obtaining strength for compression and bending (C2), and increasing the portion of the outermost casing (C). In order to balance the strength of the two parts, we realized a structure in which the bucket making part 2 is thin and light (but still has sufficient strength).

Furthermore, in the above assembly structure, when the casing main body 6 is removed, the frame portion of the built-in components is exposed, so that assembly workability is improved.

In addition, since the sealing part between the casing body 6 and the gripping cover 7 can be easily configured as a simple ring-shaped joint part, the sealing of that part is simple and reliable.[7] Since the assembly and tightening of the main body 6 and the gripping cover 7 can be done by pressure contact using the member 71, there are no unnecessary through holes such as screw holes, which improves the sealing performance.
Also, since there is no galling due to eccentricity between the continuous hole and the screw,
For example, it is easy to use synthetic resin (2) molding can be produced at low cost.

In addition, in the above-mentioned structure Fs, -2, the main body 4 of the second imitation section is a pair of metal bodies 72.7 having a relatively large area.
3, the 1ili wall 74 of the casing body 6 is inserted and fixed, so the fixation is reliable and strong, and
The stress on the casing body 6 is reduced, and durability is improved.

Also, during the bending operation, the wire guide pipe 95 for the bending operation
Between the fixed part at the base end and the fixed part of the bending wire advancing and retracting means C2, compression and bending force acts on the operating part main body 4C, but this part originally has tensile stress. The compressive force is canceled out by the tensile force, and the bending force (the resistance force against the two is strong).

As explained above (according to Hiroaki Niki), the operating section can be made lightweight and thin, and it can also be made into a structure that is strong and durable against compression and bending.

In particular, since the deflection prevention stopper (two-way stopper) can prevent deflection of the operating section body even when operating the operating mechanism, this also makes it possible to form the operating section main body into a compact size of 1J.

Furthermore, according to the present invention (2), the operation part can be easily assembled, the sealing performance can be improved, and it can be manufactured at low cost.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the operating section of a conventional endoscope;
Figures 1 to 14 show one embodiment of the present invention, in which Figure 2 is a schematic perspective view of the internal caster 1, Figure 3 is a perspective view of the operating section main body, and Figure 4 is the operation. Fig. 5 is a cross-sectional view of the connecting structure of the light guide cable to the operation part C2, and Fig. 6 is a perspective view of the main body as seen from the opposite back side.
- A cross-sectional view taken along line Vl C2, FIG. 7 is a cross-sectional view showing a portion of the channel body, FIG. 8 is a cross-sectional view of the connecting portion between the operating section and the push-in section, and FIG. 9 is a cross-sectional view of the operating section. Fig. 10 is a cross-sectional view of the internal mechanism of the operating section, Fig. 11 is a side sectional view thereof, Fig. 12 is a sectional view of the connecting part between the eyepiece section and the eyepiece section, and Fig. 13 is the casing. The cross-sectional view of FIG. 14 is also an explanatory view showing the action of the casing. 2... Operating unit, 4... Operating unit main body, 6... Casing, 6... Casing main body, 7... Gripping cover,
56... Main plate, 57... Frame, 58... Cylindrical body, 68... Reception part, 69... Male thread, 71... Tightening member, 72... Inner (111 Metal body, 73...
Outer metal body, 11)... Stopper member for preventing deflection, 112... Stopper member for preventing deflection, 113...
・Stopper piece. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 (Question 4 Kazuo Wakasugi, Commissioner of the Patent Office 1. Special indication of the case - No. 143682/1982 2, Title of the invention Endoscope 3, Relationship with the case of the person making the amendment Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 6, Specification to be amended (1) Scope of claims in the specification! Amend as per attached sheet (2) "Fig. 10" on page 14, line 20 (bottom line) is corrected to "Fig. 12." 2. Claimed operating mechanism! Main body of the operating section to be held and this operation and a cylindrical casing enclosing the gauging section, one end of the casing and one end of the operating section main body are connected to each other. Tighten the ends 4
A mounting member is provided, and this tightening member applies compressive force to the casing! At the same time, a tensile force is applied as a reaction force to the press-contact action of the operating unit main body plate, and at least when the operating mechanism is operated, the operating unit main body L is bent between the intermediate portion of the operating unit main body and the casing. The endoscope is characterized in that a stone "Y" for preventing the bending of the operating section main body is installed on the swollen side to be interposed between the operating section main body and the casing.

Claims (1)

[Claims] It has an operating section main body that holds an operating mechanism and an hJ-shaped casing that encloses this operating section main body, and one end of this casing and one end of the operating section main body are connected. A tightening member is provided at the end of the main body opposite to the connecting portion to the casing, and the tightening member applies compressive force to the casing and causes the operating part main body to react to the pressure contact action. Gives a tensile force as a force,
Between the middle part of the operation part body and the casing, there is a stopper on the side where the operation part body bends and swells when the operation mechanism is operated. An endoscope characterized in that the endoscope is installed between the main body and the casing.