JPS62281917A - 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 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an endoscope having a structure in which a grip part is connected to an operating part.

[Conventional technology]

The operating section of the endoscope disclosed in Japanese Patent Application Laid-Open No. 60-210233 has a grip section extending from the operating section body provided with an eyepiece section and an angle lens. The above-mentioned Anne (Rulepa) is in the main body of the koji-bu.

An operating mechanism is housed therein which pushes and pulls the bending operation wire in response to the - operation. Furthermore, the operation part main body has a hole located on the insertion part side that opens, through which built-in items such as the bending operation wire, inge guide, and light guide can be led out to the grip part and insertion part side. It has become. Further, the base ends of two frames are connected to the opening edge of the hole.

A branch main body is attached to the tip of the frame, which branches the forceps port and the suction channel. A grip 9 part cover that surrounds the frame and constitutes the grip part is installed between the operating part main body and the branch part main body. One end of the grip portion cover is simply fitted onto the operating portion main body and the branch portion main body via an O-ring.

Further, the insertion portion is connected to the branch main body.

[Problem that the invention seeks to solve]

By the way, in the structure of the conventional endoscope described above, when a torsional force is applied to the branch main body during use, the torsional force is applied to the frame. However, since this frame is made of light and relatively weak material such as aluminum to reduce weight, it easily twists when subjected to the above torsional force, and the built-in image guide, light guide, etc. There was a risk of damaging things.

The present invention has been made in view of the above-mentioned problems, and its purpose is to increase the resistance force against the Yb moment applied to the grip portion and the insertion portion during use and assembly, and to increase the resistance to the built-in An object of the present invention is to provide an endoscope that can prevent damage.

[Means and effects for solving the problems] In order to solve the above problems, the present invention provides a structure in which the connecting part main body connected to the operation part main body and the connecting members such as the grip 9 part cover and the insertion part are engaged with each other. An engaging means is provided, and the engaging means transmits the force applied to the connecting part main body during use or assembly to the grip part cover, and also transmits the applied force applied to the insertion part to the connecting part main body. This is because it was configured as follows.

〔Example〕

1 to 3 show a first embodiment of the present invention.

FIG. 2 shows, for example, a bronchial endoscope 1, which includes an operating section 2 and an insertion section 3, and the operating section 2 is connected to a light guide cable (not shown). Furthermore, the operating section 2 includes a substantially spherical operating section main body number part, and a grip section 5.
The connecting part main body 6 and the longest flexible insertion part 3 are connected to the connecting part main body 6. The operating section main body 4 is provided with an eyepiece section 7, a bending operating lever 8, and a suction operating section 9.

As shown in FIG. 1 (5), the grip portion 5 has a first
A plurality of connecting rings 11 and a second connecting ring 12 on the tip side are connected by a plurality of frames 13 and 14, in this embodiment, two frames 13 and 14, and a cylindrical frame made of synthetic resin or metal, which will be described later, It is covered with a grip part cover 83.

The first connecting ring 11 has a bent peripheral edge 16 formed at its base end, and the bent peripheral edge 16 side is fitted into the opening of the operating section main body 4, and a protrusion is formed inside the opening. It abuts against the wall 17 and is fixed to the protruding wall 17 by a plurality of mounting screws 18 .

Further, the peripheral wall portion of the support plate I9 is abutted against the wall surface on the opposite side of the protrusion wall 17. The supporting plate 19 and the bent peripheral edge 16 of the first splicing ring 1 sandwich the protruding wall 17 in a sandwich manner, and the mounting screws 18 passing through these allow the three Tighten and secure as one unit. Further, each of the frames 13 and 14 is formed of a long metal plate, for example, aluminum, with a short circular arc cross section, as shown in FIG. Both ends of each frame 13.14 are fastened to the outer peripheral surfaces of the first and second connecting rings 11.12 using two setscrews.

Further, each of the frames 13, 14 is arranged offset to one side with respect to the central axis of the grip portion 5, as shown in FIG. Furthermore, the first and second connecting rings 11 and 12 are cut out to form cutout portions 22 and 23 corresponding to the openings between the frames 13 and 14, respectively. . Knob, this notch 22.2
The other parts excluding 3 are the protruding pieces 24, 24, 25
Leave as ゜25, this protruding piece part 24, 24, 25゜2
Each of the frames 13 and 14 is attached to the frame by passing it over the circumferential surface of the frame 5.

Further, a connecting portion main body 6 for connecting the insertion portion 3 is provided at the distal end of the second connecting ring 12, and this connecting portion main body 6 is composed of a cylindrical body 26 and a cover 27. A cylindrical cover 27 is fitted onto the outer periphery of the cylindrical body 26, and a base end portion of the cover 27 is screwed to the cylindrical body 26. Further, a connecting piece 29 is fitted on the outer periphery of the proximal end and the tightening portion of the cover 27 so as to cover the outer periphery of the ring 28. Further, the proximal end portion of the connecting ring 29 is interposed between the second connecting ring 12 and the tightening ring 28, and the tightening is performed by the ring 28 to connect the connecting ring 29 to the second connecting ring 12. The upright portion of the connecting ring 12 is pressed against the wall portion 30. A washer 3 is installed between this tether 29 and the rising wall 30.
1 is intervening. Note that there is a 0+J song 2 for liquid tightness between the outer periphery of the base end of the cover 27 and the connecting piece 29.
is intervening.

On the other hand, as shown in FIG. 1(8), a fitting hole 36 is formed obliquely in the side wall of the operating part main body 4 of the operating part 2, and this fitting hole 36VC is connected to the cylinder 37 (which performs the suction operation). (Piston not shown) is fitted. This cylinder 37 has a thin outer circumference at its inner end, and a tapered peripheral surface 41 is formed between the small diameter section 38 and the large diameter section 39 at the outer end. Then, it is fitted into the fitting hole 36 from the small diameter portion 38 to the large diameter portion 39 thereof. That is, since the fitting hole 36 is formed obliquely, the first wall portion 42.near the inner end thereof is in close contact with one side surface of the small diameter portion 38. A second wall portion 43 is formed in close contact with one side surface on the same side of the tapered peripheral surface portion 4I, and a third wall portion 44 is formed in close contact with one side surface on the opposite side of the large diameter portion 39. That is, the first and second wall portions 42, 43
are arranged on the same side, and the third wall section 44 is arranged on the opposite side. Further, an annular retaining groove 45 is formed on the surface near the tip of the small diameter portion 38 of the cylinder 37 . A retaining screw 47 is engaged with the retaining groove 45, which is screwed into the tip of an upright piece 46 formed by machining a part of the support plate 19. The holding screw 47 is oriented at an obtuse angle, for example, 45 degrees, with the central axis of the cylinder 37, and is directed toward the distal end of the cylinder 37. Therefore, the tip of the retaining screw 42 comes into contact with the wall surface on the tip side of the retaining groove 45. Further, the fitting hole 36 and the cylinder 37 which are joined to each other are bonded together.

Further, one end of the first channel forming pipe 56 is connected to the inner end of the cylinder 37, and the pipe f
A second channel forming pipe 58 is connected to the other end of 56 via a connector 57 . This both pigue 56
, 58 are located inside the grip portion 5. The second channel forming pipe 58 is extended toward the insertion section 3 and guided to the connection section main body 6, and is connected to the channel pipe inserted into the insertion section 3 in the connection section main body 6 by means described later. ing. On the other hand, as shown in FIG. 1 (5) and FIG. 3, a disk-shaped wire guide support member 6 made of relatively soft metal, such as aluminum, is attached to the second connecting ring 12. ing. That is, the second connecting ring 12 has its protruding piece 25.
A fitting hole 63 having a stepped portion 62 at the inner end is formed so that the inner diameter of the portion of the wire guide support member 6 is larger than that of the other portions. It is set to fit tightly. Then, the wire guide support member 61 is deeply fitted into the fitting hole 63 until it touches the stepped portion 62 and positioned. Further, a tapered slope 64 is formed along the entire circumference of the peripheral edge of the wire guide support member 61 opposite to the stepped portion 62. The protruding piece 25.25 is positioned so as to correspond to the slope 64 of the wire guide support member 61 in the fitted state.
Set screws 87 and 611 are screwed into the respective parts. Further, the tip of each set screw 67°68 has a conical point, and its inclination angle is, for example, the slope 640.
It depends on the angle. After fitting the wire guide support member 6z into the fitting hole 63Vc, each set screw 67.
68 as shown in FIG. 1 (5) and FIG. It digs in and becomes fixed. By biting the tips of the set screws 67 and 68 into the slope 64, the wire guide support member 61 is fixed at a fixed position so as not to rotate in the circumferential direction.

Furthermore, the wire guide support member 61 includes a pair of closely wound coils 73 as wire guides for respectively guiding operation wires 71 and 72 for bending the insertion section 3.
74 is attached at one end. That is, the cylindrical holding member 75° 76 into which one end of the tightly wound coil 73, 74 is inserted and held is connected to the wire guide supporting member 61Kjjj.
At the same time, the wire guide support member 61 is held in place by nuts 77 and 78 screwed into both ends of the holding members 75 and 76, respectively.

Further, each of the operating wires 21, 72, which have been guided through the tightly wound coils 73, 74 as a wire guide, are led to the operating section main body 4 side of the operating section 12, and are connected to the operating section via pulling wires 79, 80, respectively. It is connected to a bending operation im (not shown) installed in the main body 4. The bending operation mechanism is driven by the bending operation lever 8, and is connected to the pair of operation wires 7 via the pulling wires 79, 110.
By pushing and pulling 1°72 in the opposite direction, the insertion part 3
The bending can be controlled remotely. Further, the connecting portion between the operating wire 71.72 and the pulling wire 79°80 is connected via a ring 81.82, and this connecting portion is located inside the grip portion 5 as shown in Fig. 1 (5). They are being placed in a similar position.

Furthermore, as shown in FIGS. 1(5) and 3, the finger portion 5 is covered with a cylindrical grip portion cover 83 made of synthetic resin so as to enclose the frame 13.14. The base end portion of the grip portion cover 83 is tightly fitted and fixed to the operating portion main body 4. In addition, this fitted part has OI for liquid tightness.
J song 4 is inserted. In addition, the grip part cover 83
The distal end portion of the tether 29 is tightly fitted onto the outer periphery of the proximal end portion of the tether 29, and a liquid-tight O-ring 85 is inserted into the fitted portion. Further, the grip portion cover 83 is pressed toward the operation portion main body 4 side by the tether 29, thereby being sandwiched between the operation portion main body 4 and the tether 29 and fixed. Moreover, this grip part cover 83 is
As shown in the figure, wall portions 8 whose opposing sides are flat, respectively.
6,117.

As shown in FIG. 3, the second connecting ring 12 is formed with a locking portion 88 that integrally extends and projects toward one flat wall portion 86 of the grip portion cover 83. The tip of the engaging portion 88 forms a linear end surface along the inner surface of the wall portion 86, and is so close to the wall portion 86 that it almost touches. One! !
This locking portion 88 engages with the grip portion cover 83. Therefore, this second splicing ring 12
When the user attempts to rotate the center shaft of the operating portion 2, the rotation is transmitted to the grip 9 portion cover 83FC via the locking portion 88.

Therefore, the torsional force applied to the locking portion 8BVC provided on the second splicing ring 12 and the connecting portion main body 6 fixed to the cylinder body 26 is applied not only to the frame 13.14 but also to the locking portion thereof. It is also added to the grip part cover 83 via 88. Toe 9,
The torsional stress is also received by the grip 9 part cover 83 at the same time, thereby preventing the frames 13, 14 from being strongly twisted.

Therefore, the strength against torsional stress is increased, and damage to built-in components due to twisting can be prevented.

On the other hand, the cylindrical body 26 and the cover 2 constituting the connecting body 6
7 is constructed as shown in FIG. 1(B). That is, the cylindrical body 26 protrudes from the tip of the cover 27, and this tip is formed into a tapered tapered portion 26a. Further, a branch main body 90 branched into a substantially Y-shape is screwed and connected to the tip of the cover 27.
This main cylindrical portion 91 is externally fitted onto the cylindrical body 26 . Further, the tip end 91a of the main cylinder portion 91 is fitted into the tapered portion 26a of the cylinder body 26. And this cylindrical body 26
The fitting portion 92 of the main cylinder portion 91 is fixed by a fixing screw 93. Further, an insertion tube 96 constituting the insertion section 3 is connected to the inner circumference of the fitting part 92 via a connecting ring 94, and a bendable tube body 96 constituting the insertion part 3 is connected to the outer circumference of the fitting part 92 via a fixed ring 97. A stop tube body 98 is connected. Furthermore, a branch block 100 is fixedly provided inside the branch main body 90. This branch block 100 has first to third connecting holes 101 corresponding to the branch main body 90.
- 103, and these connecting holes 101-103 communicate through a substantially Y-shaped branch passage 104. The first connecting hole 101 is connected to the channel forming pipe 58, and the second connecting hole 102 is connected to the channel pipe 105 installed inside the insertion pipe body 96. Further, the 83 connecting holes 103 of the branch block 100 are oriented in the same direction as the branch tube section 106 branched from the main tube section 91 of the branch section main body 90.
The base end of the channel cap 107 is connected to the connecting hole 103VC. The middle part of this channel cap 107 is fixed to the open end of the branch part 106 by a fixing ring 10B, and the tip part protrudes from the branch cylinder part 106.

An inner plug 1 is provided at the tip of this channel cap 107.
A forceps plug 111 consisting of a forceps plug 09 and an outer plug 110 is removably fitted.

Note that the present invention is not limited to this, and a separate engaging member may be provided. FIGS. 4 and 5 show a second embodiment.

That is, as shown in FIG. 5, this engaging member 112 consists of a ring part 113 that is joined to the circumferential part of the second connecting ring 12, and this ring part 113 has a second ring part 113 as shown in FIG.
Spacer portions 114 and 115 are provided to protrude from the connecting ring 12 facing the notches 23 and 23, respectively. The ring portion 113 is sandwiched between the second connecting ring 12 and the connecting ring 29. Further, each of the spacer parts 114 and 115 fits close to the opening edges of the notches 23 and 23 of the second splicing ring 12, as shown in FIG.
8, each flat wall portion 86 of the grip portion cover 83
, flat curves 116, 116 along the inner surface of 'g 6
forming a peripheral surface 116.116 with its wall 86.8.
It is placed so close that it almost touches the inner surface of 6. Tsutb,
This forms an engaging part that engages with the grip p part cover 83.

In this embodiment as well, the screw hooks added to the connecting portion main body 6 are received by the grip portion cover 83, and the frames 13, 14
can significantly reduce torsional stress.

Although the embodiments described above are relatively small-diameter bronchial endoscopes, the present invention is not limited to the embodiments described above, and can also be applied to relatively large-diameter endoscopes. Figures 6 to 9 are the third
This figure shows an example of the operation section of the endoscope. 120
is the main body of the operating section.

A mounting plate 121 for attaching various operating mechanisms (not shown) is provided inside the operating section main body 120, and the mounting space 121 is provided so as to protrude from an opening 122 of the operating section main body 120. In addition, in this installation, a pair of frames 123, 12 are attached to the protruding part of the pace 121.
3 is connected and this frame 123, 1
23 and the above-mentioned mounting plate 121 are fitted with a grip part cover 124 as a connecting member. The tab and grip cover 124 are integrally connected to the operation unit main body 120 and are formed as a grip that the operator holds, for example, with his left hand. Further, the distal end of the grip cover 124 is formed to have a slightly smaller diameter than its base side, and a branch main body 125 branched into a substantially Y-shape is integrally provided in this small diameter portion. And the said installation is PACE 121
The pair of frames 123, 123 fixed to the main cylinder 126 of the branch body 125 extends to the inside of the main cylindrical part 126, and the connecting body 127 is attached to the distal end of the frames 123, 123.
are connected. That is, frames 123, 123
A connecting ring 128 is fixed to the connecting ring 128 by fixing screws 129, 129, and the proximal end of a cylindrical connecting body 127 is fitted into this connecting ring 12BIC. This connecting portion main body 127 has fixing screws 130, 130.
is fixed to the connecting ring 128 by.

Furthermore, a flange 1 is provided at the proximal end of the connecting portion main body 122.
31 is provided integrally, and as shown in FIG. 7, two engaging recesses 132, 132 are provided symmetrically. Furthermore, engagement convex portions 133, 133 that engage with the engagement concave portions 132, 132 are integrally provided on the inner peripheral portion of the grip portion cover 124, which faces the engagement concave portions 132, 132. The engagement between the engagement concave portion 132 and the engagement convex portion 133 constitutes an engagement means that prevents the connection portion main body 127 and the grip portion cover 124 from rotating relative to each other in the circumferential direction. That is, the frame 123, 123 has a grip 9
Since it is fixed to the connecting part main body 127 that is engaged with the part cover 124, the frame 12
No twisting force is applied to 3 and 123, and damage to built-in components can be prevented. Further, the tip of the connecting portion main body 122 is
A tapered portion 134 is formed so that its inner diameter is tapered, and the insertion portion 3 is connected to this tapered portion 234. In other words, 136 is a connecting tube constituting the proximal end of the insertion section 3, and the proximal end of the insertion tube 137 of the insertion section 3 is connected to the connecting tube 136. This connecting pipe body 1
The outer circumferential surface of 36 is the tapered portion 134 of the connecting portion main body 127.
A tapered surface 138 and a threaded portion 139 are formed to correspond to the above. The threaded portion 139 has the connecting portion main body 1
A tightening ring 140 force xg is brought into contact with the end face of 27,
This tightening of the ring 140 connects the connecting portion main body 127 and the connecting tube body 136 by force. Furthermore, as shown in FIG.
Two retaining spaces 141°141 are provided symmetrically. Further, engagement recesses 141, 141 are provided on the inner circumference of the connecting portion main body 127 facing these engagement recesses 141, 141.
Retaining protrusions 142, 142 that engage with are integrally provided. The engagement recess 141 and the engagement protrusion 142
The connecting portion body 127 and the connecting tube body 136 of the insertion portion 3 constitute an engaging means that prevents the connecting portion main body 127 and the connecting tube body 136 of the insertion portion 3 from rotating relative to each other in the circumferential direction. Further, a fixing ring 143 is screwed onto the outer periphery of the distal end of the connecting portion main body 127, and a bend preventing tube body 144 is connected to the fixing ring 143. At this time, the tightening ring 140 cannot be tightened even if nine torsions are applied to the connecting tube body 136 due to force.
is transmitted to the connecting portion main body 127 by the engagement between the engaging recess 141 and the engaging protrusion 142. 1'1, connection part main body 127
Due to this engagement, rotation of the connecting tube body 136 in the circumferential direction is prevented, and no twisting is applied to the insertion portion 3.

Further, a branch block 145 is fixedly provided inside the branch main body 125. This branch block 1
45 corresponds to the branch main body 125, a first
- third connecting holes 146 to 148), these connecting holes 146 to 14B form a substantially Y-shaped branch passage 149VC.
Therefore, they are communicating. Then, the first connecting hole 146
A channel forming pipe 150 is connected to the 20th
A channel pipe 15 installed inside the insertion pipe body 136 is connected to the connection hole 147 . Further, the third connection hole 148 of the branch block 145 is connected to the branch body 1
The third connection hole 148 is oriented in the same direction as the branch cylinder part 152 branched from the main cylinder part 126 of No. 25, and the proximal end of the channel cap 153 is connected to this third connection hole 148. A midway portion of this channel cap 153 is fixed to the open end of the branched tube portion 152 by a fixing ring 153a, and a tip portion thereof protrudes from the branched tube portion 152.

Further, the connection portion between the second connecting hole 147 of the branch block 145 and the channel pipe 151 is configured as shown in an enlarged view in FIG. 9. That is, branch block 14
The inner peripheral surface of the second connecting hole 147 of the winnowing hole 147 has a fitting bone portion 154 that is eccentric to the axis 16 of the connecting hole 147 of the winnow 2.
is provided. That is, the fitting bone portion 154 is formed by internally grinding the second connecting hole 147, and is deep on the extension line of the third connecting hole 148 and shallow on the opposite side. A fitting cylindrical portion 156 on the proximal end side of the connecting tube body 1550 is inserted into this fitting bone portion 154 . Fitting cylinder part 156 of this connecting pipe body 155
The wall thickness of the mating bone, which is deeper, is formed to be thinner than that of the part 154, and when the mating bone is fitted to the part 154, it fits into the inner surface of the second connecting hole 147. Cylinder part 156
A step a is formed between the inner surface and the inner surface. The distal end portion 158 of the treatment instrument 157 that is inserted through the channel mouthpiece 153 and the boundary portion 160 between the distal end portion 158 and the flexible treatment instrument tube 159 are arranged so that the treatment instrument 157 can be inserted smoothly without getting caught. Further, a threaded portion 16 is provided in the middle of the connecting tube body 155, and a connecting portion 162 is provided at the tip end, and the channel pipe 151 is fitted and connected to the connecting portion 162. The fitting connection portion with is fixedly tightened by a nut 163 that is screwed into the threaded portion 16.

〔Effect of the invention〕

As explained above, according to the present invention, even if an external force in the torsion direction is applied to the grip portion cover and the insertion portion during use and assembly, twisting can be prevented by the engagement means with the connecting member. . Therefore, it is possible to prevent damage to the built-in parts of the operating section and the insertion section due to the tel, and the connecting parts can be positioned relative to each other during assembly by the engaging means.
This has the effect of improving assembly workability.

[Brief Description of the Drawings] Figures 1 to 3 show a first embodiment of the present invention, in which Figure 1 (5) is a vertical cross-sectional side view of the grip, and ■ is a vertical cross-sectional side view of the connecting body. 2 is a side view of the entire endoscope, FIG. 3 is a cross-sectional view taken along line G in FIG. 1 (5), and FIG. 4 shows a second embodiment of the present invention. 3 is a cross-sectional view at the same position as FIG. 3, FIG. 5 is a perspective view of a locking member according to a second embodiment of the present invention, and FIGS. 6 to 9 show a third embodiment of this invention. , FIG. 6 (5) is a vertical side view of the grip, FIG. 6 (Bl is a vertical side view of the connecting body), and FIG.
), the 8th prisoner is shown in Figure 6 (B).
A sectional view taken along the line -■, and FIG. 9 is an enlarged sectional view of a part of the branch block. 1... Endoscope, 2... Operation section, 3... Insertion section, 4
...Operation unit main body, 5...Grip section, 6,127...
Connection part main body, 83...Grip part cover, 132, 141
... Engagement recess, 133.142 ... Retention convex part. Applicant's representative Patent attorney Atsushi Tsuboi Figure 2 Figure 3 Figure 4 Figure 7 Figure 5 Figure 8 Procedural amendment 1. Indication of the case Patent application No. 61-249529 No. 26 Title of the invention No. 2 UBE Building 7,
Contents of amendment (1) “This cover 2” on page 6, lines 11-12 of the specification
The base end portion of 7 is screwed to the cylindrical body 26. " is corrected to "The base end of this cover 27 is fitted into the cylindrical body 26." (2) "Operation unit 12" on page 11, line 5 of the specification is corrected to "operation unit 2." (3) In the 4th to 5th lines of page 14 of the specification, ``Furthermore, at the inner periphery of the fitting portion 92'' is corrected to ``Furthermore, at the inner periphery on the distal end side of the cylindrical body 26.'' (4) In the drawings, Figures 1 (A), (B), 3 and 6
Correct figure (B) as shown in the attached sheet. (There is no change in the contents of Figure 2) Procedural amendment 1. Indication of the case Japanese Patent Application No. 61-249529 2, Name of the invention Endoscope 3, Person making the amendment Relationship to the case Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 3-chome, Kasumigaseki, Chiyoda-ku, Tokyo 7-2 UBE Building 〒1
00 Telephone 03 (502) 3181 (main representative)
7. Details of corrections Figure 1 (A) and (B) will be corrected as shown in the attached sheet.

Claims (3)

[Claims] (1) An operating section main body, a connecting section main body connected to the operating section main body, a connecting member connected to the connecting section main body, and a connecting section provided on the connecting section main body and the above connecting section main body and engaging with each other. What is claimed is: 1. An endoscope comprising an engaging means for preventing rotation in the circumferential direction. (2) The endoscope according to claim 1, wherein the connecting member is a grip cover. (3) The endoscope according to claim 1, wherein the connecting member is an insertion section.