JPH07194513A - Cover member for endoscope - Google Patents

Abstract

PURPOSE:To provide an endoscope cover member which can reduce as much of damage to a locked portion as possible. CONSTITUTION:An endoscope cover member 31, having a roughly circular, elastic lock piece 81 which can be locked to the end of the insertion portion of an endoscope, and capable of being freely removably attached to the end of the insertion portion using the lock piece 81, is provided with a protective portion 33 whose outside diameter is greater than the critical diameter for elastic deformation of the lock piece 81 under compression.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover member for an endoscope which is detachably attached to the distal end of an insertion portion of the endoscope and has a forceps raising mechanism and the like built therein.

[0002]

2. Description of the Related Art As is well known, medical endoscopes such as gastroscopes and duodenal scopes have their insertion portions inserted into the body cavity of a patient to observe and treat the affected portion. A forceps raising device is a mechanism that directs forceps to a desired affected area when collecting biopsy tissue or treating it with forceps while observing the affected area. This forceps raising device is basically composed of a forceps raising base rotatably provided at the distal end of the insertion section and an operation wire connected to the forceps raising base. By doing
The rotation angle of the forceps raising base is adjusted to regulate the protruding direction of the forceps protruding from the tip of the endoscope.

When the endoscope is used, the fluid in the body cavity infiltrates into the forceps raising base storage chamber for storing the forceps raising base and the guide tube for guiding the operation wire. Therefore, it is necessary to wash these sites after using the endoscope. In particular,
Since the guide tube for the operation wire has a small diameter and the operation wire passes through the inside thereof, cleaning is very troublesome.

Therefore, in Japanese Utility Model Laid-Open No. 52-67790 and Japanese Utility Model Publication No. 59-15601, a member (packing) for preventing entry is provided at the tip opening of the guide tube to prevent body fluid from entering the guide tube. To prevent.

Further, the guide tube is composed of an outer layer tubular member made of a tube body and an inner layer tubular member made of a closely wound coil body, and the forceps raising base, the operation wire and the inner layer tubular member are detachable. Japanese Patent Laid-Open No. 56-8030 discloses that these members can be easily cleaned.

On the other hand, a structure in which a forceps raising base storage chamber for accommodating the forceps raising base is exposed to the outside and the exposed portion is covered with a detachable cover member is disclosed in Japanese Patent Laid-Open No. 4-31443.
No. 9 and JP-A-57-75629. This configuration is advantageous in that the forceps raising base storage chamber can be easily washed simply by removing the cover member.

[0007]

By the way, in order to easily and reliably clean the forceps raising base accommodating chamber, which is particularly liable to be contaminated, one of the conventional configurations described above is disclosed in Japanese Patent Laid-Open No. 4-3144.
It is advantageous to use the configuration disclosed in Japanese Patent Laid-Open No. 39 or JP-A-57-75629, that is, the configuration in which the site where body fluid is likely to enter is exposed to the outside by removing the cover member.

[0008] Among such cover members, there is a cover member having a thin and thin engaging portion that is attached to and detached from the endoscope insertion portion. In particular, when such a locking portion is the maximum outer diameter portion of the cover member, an external force positively acts on the locking portion, which may damage the locking portion. If the locking portion is damaged, the function of attaching and detaching the cover member will be hindered, which is not preferable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope cover member capable of preventing damage to a locking portion as much as possible.

[0010]

In order to solve the above-mentioned problems, the present invention comprises a substantially annular locking piece having elasticity which can be locked to the distal end side portion of the insertion portion of an endoscope. In an endoscope cover member that is detachably attachable to the distal end side portion of the insertion portion using a stop piece, a protective portion having an outer diameter larger than an elastic deformation limit diameter of the locking piece at the time of compression. It is provided.

[0011]

In the above structure, the outer diameter of the protection portion is larger than the elastic deformation limit diameter of the locking piece, that is, the outer diameter of the locking piece when the locking piece is compressed and reaches the elastic limit. Therefore, even if an external force acts on the locking piece, the external force is dispersed to the protective portion before the locking piece reaches the elastic limit.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 19 show a first embodiment of the present invention. Of these, FIG. 1 is an overall configuration diagram of an endoscope. As shown in the figure, the endoscope includes an operation unit 1. The operation portion 1 is provided with a grip portion 2 for holding it by hand. Further, the insertion portion 3 and the universal cord 12 are connected to the operation portion 1. The universal cord 12 has a connector 7 at its end. The connector 7 is connected to a light source device 8 that supplies illumination light.

The insertion portion 3 has a bending portion 5 that is bent by rotating an angle knob 6 provided on the operation portion 1, and a tip portion 4 provided at the tip of the bending portion 5. ing. The distal end portion 4 is provided with one opening of the forceps channel extending over the entire length in the insertion portion 3. The other opening of the forceps channel has a forceps opening 2 on the operating portion 1.
It is provided as 1. A forceps plug 22 can be attached to the forceps opening portion 21 as needed. The insertion portion 3 has a bend stopper 3 for preventing damage.
6 is provided at the end of the operation unit 1 side.

An air supply device 13 and a water supply device 14 are connected to the connector 7. A video processor 10 for processing a video signal is connected to the connector 7 via a connection adapter 9. The video processor 10 has a monitor 11 for displaying a subject image based on the video signal that has been subjected to signal processing.
A VTR deck 17 for recording and reproducing a video signal, a video printer 16 for printing a subject image by the video signal,
A video disk 15 or the like, which is a large-capacity storage device for recording a video signal, is connected. A switch 20 for operating the video processor 10 is provided in the operation unit 1.
Further, the operation portion 1 is provided with an air / water feeding piston 18 for feeding / watering to the tip portion 4 of the insertion portion 3 and a suction piston 19 for suction.

The operating portion 1 includes a forceps raising wire opening 2
3 is provided below the grip portion 2, and a drive shaft opening 24 is provided in the grip portion 2. One end of the forceps raising wire 26 is led out from the forceps raising wire opening 23, and one end of the drive shaft 27 moved from the drive shaft opening 24 by a forceps raising lever 29 provided coaxially with the angle knob 6. Has been derived. The drive shaft 27 and the forceps raising wire 26 are detachably connected by a connecting tool 28, and this connecting portion is covered by a removable protective cover 25 made of an electric insulator.

Next, details of the tip portion 4 will be described with reference to FIG. The tip portion 4 is composed of a tip portion main body 37 that is integral with the insertion portion 3 and a cover member 31 that is detachably provided on the tip portion main body 37. The tip end main body 37 is provided with an objective lens 34, an illumination lens 35, and a nozzle 36 for ejecting air, water, or the like to the objective lens 34 and the illumination lens 35.

Further, the distal end portion 4 is provided with a distal end opening portion 39 (see FIG. 4) of a channel 38 (see FIG. 4) communicating with the forceps opening portion 21 of the operating portion 1, and is inserted into the channel 38 at the tip thereof. Raising stand 4 for raising raised forceps (not shown)
0 is provided.

As shown in FIG. 5, the raising base 40 has a tip accommodating portion 41, and the tip accommodating portion 41 has a fixing portion in which the tip of the forceps raising wire 26 is plasma-processed into a spherical shape. A chip 42 is stored. The fixing tip 42 has a diameter larger than the outer diameter of the forceps raising wire 26.

The forceps raising wire 26 is used for the tip accommodating portion 4
1 is used as a base point, and is inserted into a guide hole 43 that passes through the inside of the elevator 40 at an acute angle and obliquely upward, and then, the elevator 40 is inserted.
Is bent in the opposite direction so as to come into contact with the side surface 44. In this configuration, the wire 26 and the raising base 40 are shown in FIG.
As shown in (1), the wire 26 and the lift 40 are fixed by a simple method with a small number of parts. As shown in the figure, the cover member 31 can be integrally removed from the tip end main body 37 together with the three-member assembly of the raising base 40, the raising wire 26, and the insulating block 52. That is, the cover members 31 and 3
The forceps raising base unit 53 is configured integrally with the above-mentioned sub-unit composed of members, and is detachably attached to the tip end main body 37.

Further, the raising base 40 is made of insulating plastic or the like. A raising shaft 45 integrally formed with the raising base 40 is provided on the side surface of the base end side portion of the raising base 40 so as to project. The raising shaft 45 is fitted into the shaft hole 49 of the slope portion 47 provided in the cover member 31, and allows the raising base 40 to rotate within a predetermined angle range.

The cover member 31 detachably attached to the tip end main body 37 is made of an insulating member such as polysulfone or modified PPO. A fixed cover 4 is provided on the outer periphery of the tip end main body 37.
6 is coated. As shown in FIG. 7, the fixed cover 46 is attached to the tip end body 37 by fitting the pin 50 into the side hole 51 of the tip end body 37 and adhesively fixing the pin 50.

In the figure, 87 is a light guide, 88 is an adhesive filling portion filled with an adhesive, 89 is an adhesive plate, 91 is an objective lens group, 92 is a lens frame, and 93 is a fixing screw for fixing the lens frame 92. , 99 is a CCD, 104 is an air / water supply tube, 105 and 106 are protection tubes coated on the outer periphery of the light guide 87, 107 is a forceps guide groove formed in the cover member 31, and 108 is a bending operation of the bending portion 5. Controlled bending piece, 109 is a channel tube, 110 is a soldered portion fixed by soldering, 139 is a prism, and 140 is a CCD
A CCD frame holding 99, 141 a guide hole for guiding the light guide 87 in the tip end main body 46, 142 a blade, 143 an insulating frame, 144 a protective plate, and 145 a tip opening of the guide tube 68.

Next, the structure of the above-mentioned forceps raising base unit 53 will be described with reference to FIGS. 5 and 6.

As shown in FIG. 6, the forceps raising base unit 5
3 can be disassembled. Recent endoscopy is diversifying, and the forceps used and the raising motion differ depending on the case. Therefore, as for the raising table 40, those having different guide groove shapes and different raising angles depending on the size and type of forceps are recombined for each case. Therefore, in the configuration of the present invention, different types of raising boards 40 are given different numbers and different colors so that the respective raising boards 40 can be distinguished.

Also, the cover member 31 can be replaced with a type with a focus on insertability or one made of a material for high-frequency treatment. When the selection of the raising base 40 is troublesome, the raising base 40 having the guide groove 82 corresponding to the treatment instrument having the largest outer diameter may be used so that it can be applied to all treatment instruments.
Further, in order to be able to connect the raising base 40 and the cover member 31 of different types to each other, the connecting portions are configured to be common to all types.

By the way, as shown in the figure, the cover member 31
Is provided with a slope portion 47 along the traveling of the wire 26, and an end portion of the slope portion 47 is provided with a locking portion 54 that locks with the insulating block 52. A first hook portion 57 is formed at the end of the locking portion 54. Since the cover member 31 is a molded component made of plastic or the like, as shown in FIG.
Has a lightening hole 55 for preventing sink marks.
The lightening hole 55 is not limited to one hole, and a plurality of holes may be provided as shown in FIG.

Further, the insulating block 52 has a cover member 3
A locking hole 56 for locking the locking portion 54 is provided. A taper portion 59 and a second hook portion 58 are provided on the inner surface of the locking hole 56.

Therefore, the locking portion 54 of the cover member 31 is tapered in the locking hole 56 of the insulating block 52.
When pushed in from the side, the first hook 57 engages with the second hook 58 of the lock hole 56 while elastically deforming the lock 54, so that the cover member 31 and the insulating block 52 are connected. .

Further, the cover member 31 and the insulating block 52
When connecting and in this way, the raising shaft 4 of the raising base 40
5 is fitted into the shaft hole 49 of the slope portion 47. By doing so, the pressing protrusion 60 provided on the insulating block 52 comes into contact with the flat surface 61 provided near the rear side of the raising shaft 45 of the raising base 40, so that the raising base 40 can be removed from the shaft hole 49. Absent.

As described above, if the cover member 31 and the insulating block 52 are connected to each other by the locking holes 56 and the locking portions 54, the raising base 40 can be fixed together therewith, so that an adhesive or the like can be used. Since the assembling work is omitted, the price of the raising stand unit 53 is reduced.

Further, as shown in FIGS. 4 and 6, the insulating block 52 has a forceps insertion opening 200 provided substantially coaxially with the channel tip opening 39 of the tip body 37.
And a raising guide portion 62 which is smoothly connected to the forceps insertion port 200 and has a curved surface that follows the curved shape of the forceps when the forceps is raised.

The smooth slope portion 47 along the running of the wire 26 is constructed so that its upper end surface is smoothly connected to the parallel bottom surface 64 of the raising wire guide hole 63 penetrating the upper part of the insulating block 52. .

As shown in FIG. 2, the tip portion main body 37 is formed so that at least a portion of the surface 66 on the forceps raising base 40 side having the objective lens 34, the illumination lens 35, and the nozzle 36 is a flat surface. Together with the channel base 67
The surface of the wire guide tube 68 at which each tip is opened is also formed to be a flat surface. That is, the surface on the side of the tip portion main body 37 that comes into contact with the cover member 31 is formed as a flat surface that is L-shaped with respect to the thread winding adhesive portion 69.

The fixed cover 46 is formed in an L shape as shown in FIG. 10 (a view in the direction of the arrow C in FIG. 3), and the end 71 of the bobbin adhering portion 69 side is an O-shaped ring 74. Has been formed. Further, in the fixed cover 46, a concave groove 73 having a cutout portion 72 is provided on the tip side of the O-shaped ring 74.
Is provided. Further, the portion of the fixed cover 46 on the tip side of the recessed groove 73 is provided with the lenses 34 and 35 and the nozzle 3.
It is formed so as to cover the tip portion main body 37 from the outside except for 6 and 6. In addition, the above-mentioned thread winding adhesive portion 69 is provided with the curved portion 5
It is a portion for fixing a curved rubber 79 made of an elastic material such as fluororubber provided so as to be easily bent.

As described above, the pin 50 penetrates between the fixed cover 46 and the tip portion main body 37. The pin 50 reinforces the O-ring 74 of the fixed cover 46 against the force in the twisting direction. Are doing

Further, as shown in FIG.
A first protrusion 75 is provided on the lower part of the side surface of the side facing the raising base 40, and the fixed cover 46 is provided with the first protrusion 75.
The second projection 76 is provided so as to contact the projection 75 of the first cover 75, and the first cover 75 and the second projection 76 contact each other, thereby preventing the fixed cover 46 from rotating with respect to the tip end body 37. .

On the other hand, the end portion 70 of the cover member 31 is provided with a locking piece 81 of a C-shaped ring having a cutout portion 80. The locking piece 81 of the C-shaped ring is formed so as to elastically deform and fit into the concave groove 73 of the fixed cover 46. Further, the locking piece 8 is provided on the tip side of the cover member 31.
A protective portion 33 having an outer diameter substantially equal to the outer diameter of 1 is provided.

FIG. 9 is a front view of the cover member 31. As shown in the figure, a flat surface portion 83 is provided on the outer peripheral portion of the cover member 31, and the flat surface portion 83 allows the cover member 3 to be removed when the cover member 31 is removed from the tip end body 37.
1 does not roll.

As shown in FIG. 11, the protective portion 33 at the tip of the cover member 31 is provided with an engagement hole 84 into which the tip 85 of the wire 26 can be engaged. When the forceps raising unit 53 is stored, if the distal end portion 85 of the wire is engaged with the engagement hole 84 as shown in FIG. 12A, a member for protecting the distal end portion 85 of the wire becomes unnecessary. Also, when the forceps raising unit 53 is packed, the wire tip portion 85
Does not break through the packaging.

Further, as shown in FIG. 12B, a second engaging hole 86 is provided in the raising table 40 so as to face the engaging hole 84 of the protective portion 33 in a state where the raising table 40 is inverted. ing. Therefore, if the distal end portion 85 of the raising wire 26 is engaged from the distal end side of the cover member 31 in the order of the engaging hole 84 and the second engaging hole 86, the forceps raising unit 53 is stored or packed. Occasionally, the movement of the raising base 40 is changed by the wire 26.
Can be regulated by.

13 to 16 show a structure in which the slope portion is provided on the tip end main body 37. As shown in FIG. 13 and FIG. 14, the slope portion 97 includes the fixed cover 46.
It is provided so as to project from. Further, as shown in FIG. 15, the insulating block 52 is provided with a through hole 96 through which the slope portion 97 can be fitted and penetrated. With this configuration, when the forceps raising unit 53 is attached to the distal end portion 4, the slope portion 9 is inserted into the through hole 96 of the insulating block 52.
7, the slope portion 97 extends to the side surface 98 of the raising base 40 to suppress the lateral movement of the raising base 40.

An engaging hole 94 is provided at the rear end of the insulating block 52, and an engaging projection 95 is provided at the distal end of the distal end body 37 so as to correspond to the engaging hole 94. ing. Therefore, when the forceps raising unit 53 is attached to the tip portion main body 37, the engaging hole 94 of the insulating block 52 is
Since the engagement projection 95 of the tip portion main body 37 is engaged with, the rotation of the forceps raising unit 53 with respect to the tip portion main body 37 is restricted. After attaching the forceps raising unit 53 to the tip end main body 37, the ultra-thin portion is straddled over the locking piece 81 of the cover member 31 that engages with the concave groove 73 of the fixed cover 46 and the end portion 71 of the fixed cover 46. The film cover 100 is covered to prevent the cover member 31 from falling off.

As described above, the slope portion is the tip portion main body 3
7 or the cover member 31 may be provided,
In either case, when the cover member 31 is attached to the tip end body 37, the locking piece 81 of the cover member 31 is attached to the concave groove 73 of the fixed cover 46 of the tip end body 37.
To engage with. In this set state, the cover member 3
1 is engaged with the engaging hole 78 provided in the fixed cover 46, and the concave portion 138 provided in the cover member 31 and the convex portion 137 provided in the tip portion main body 37 are engaged with each other. To meet.

FIG. 17 shows the packed state of the forceps raising unit 53. The plastic case 1 in which the forceps raising unit 53 in a state where the tip portion 85 of the wire 26 is engaged with the engagement hole 84 of the cover member 31 is separated by the partition 101.
Pack in 02. In this case, as shown in the figure, the hook 103 provided on the partition 101 is used to connect the main portion of the forceps raising unit 53 excluding the wire 26 to the fitting portion 1.
02a, and the remaining wire 26 is inserted into the wire housing portion 10
2b is placed. If the forceps raising unit 53 is packed using the plastic case 102 having such a configuration, it is possible to prevent the wires 26 from separating during the packing, and to simplify the work of mounting the forceps raising unit 53. be able to.

FIG. 19 shows another structure of the storage member for storing the forceps raising base unit 53. Usually wire 2
6 is 1 m or more, and if the wire 26 bends, it hinders the raising operation of the raising base 40. However, for this reason, if the wire 26 is straightened and packed, the packing size becomes large, and when the endoscope is put in a carrying case, it does not fit in the case and handling becomes inconvenient. In addition, when the wire 26 is wound with a radius that is not more than twice the axial length of the cover member 31 in an attempt to reduce the packing form, the wire 26 bends or has a bending tendency, so that the raising table 40 is not bent. There is a risk that the start-up operation may be hindered.

Therefore, in the forceps raising base unit accommodating member 112 shown in FIG. 19, the wire 26 can be wound with a radius of at least twice the axial length of the cover member 31.

That is, the forceps raising base unit accommodating member 112 (hereinafter referred to as accommodating member 112) includes the raising wire winding portion 113 (hereinafter referred to as winding portion 113) and the cover member accommodating portion 114. It is configured.

The cover member storage portion 114 is provided with a storage space 115 which is substantially the same as the external shape of the cover member 31, and the cover member 31 of the forceps raising base unit 53 is fitted and inserted into the storage space 115. ing.
In addition, a protrusion 116 is provided in the storage space 115, and the tip of the cover member 31 (the tip of the protection member 33) is provided.
An engaging hole 117 with which the protrusion 116 can be engaged is formed in the hole. Therefore, when the cover member 31 is inserted into the storage space 115, the protrusion 1 in the storage space 115 is inserted.
16 engages with the engaging hole 117 of the cover member 31, and the cover member 31 is fixed in the storage space 115.

Further, the engagement hole 117 is penetrated to the engagement hole 84 as shown in each drawing. Further, a protrusion 118 that can engage with each of the engagement hole 84 of the cover member 31 and the second engagement hole 86 of the raising base 40 is provided at the tip of the protrusion 116. Therefore, when the cover member 31 is inserted into the storage space 115, the protrusion 1
18 engages with the engagement hole 84 and the second engagement hole 86 in this order,
Both the cover member 31 and the raising base 40 can be fixed in the storage space 115.

The opening portion 124 of the cover member housing portion 114 is provided with an expansion portion 119 that is wider than the outer diameter of the locking piece 81 of the cover member 31. Therefore, even if the cover member 31 is mounted in the tip end main body 37 while being stored in the cover member storage portion 114, the locking piece 81 does not hit the inner surface of the storage space 115. Further, in the cover member housing portion 114, the cutout portion 12 of the locking piece 81 of the cover member 31 can be seen from the outside.
0 and a notch 121 that allows the raising stand 40 to be seen from the outside. Therefore, it is possible to confirm the mounting state of the tip body 37 and the cover member 31 and the setting state of the raising base 40.

On the other hand, a wire storage space 122 having a substantially circular shape is provided inside the winding section 113, and the opening 123 of the winding section 113 has an opening 123.
No. 4 opening portion 124 is opened in substantially the same direction. Further, a cutout portion 126 is provided on the upper surface 125 of the winding portion so that the winding state of the wire 26 can be seen. The upper surface 125 of the winding portion forms a floating prevention portion 127 that prevents the wire 26 from floating. The floating prevention portion 127 is higher than the height of the wire 26 extending from the cover member storage portion 114. Also,
A hole 128 is provided at the center of the winding portion 113, and a wall 129 is provided around the hole 128 to prevent the wire 26 from coming loose.

When the forceps raising base unit 53 is to be stored in the storage member 112 having the above structure, the cover member 31 of the forceps raising base unit 53 is fixed to the cover member storage portion 114 as described above, and then the winding portion 113. The winding portion opening 12 on the side opposite to the cover member storage portion 114 with respect to the center
Insert the wire 26 from 3. The wire winding diameter in the wire storage space 122 is set so that the wire 26 does not bend and the storage space 122 can be minimized.

Since the winding member 113 and the cover member storing portion 114 of the storing member 112 having such a structure are integrated, the forceps raising unit 53 can be stored compactly and the wire 26 can be stored. It can be rolled up and stored without bending. In addition, the tip body 37
On the other hand, when mounting the forceps raising base unit 53, it is possible to save the trouble of inverting the raising base 40.

Further, when the forceps raising base unit 53 is attached to the distal end portion main body 37, the insertion portion 3 is extended in a substantially straight line,
The wire 26 is connected to the drive shaft 27 of FIG. 1 via the connector 28 in a state where the raising base 40 is inverted. Then, as shown in FIG. 18, the protrusion 13 of the wire connection inspection tool 132
3 is aligned with the guide groove 82 of the raising base 40, and the flat surface 134 of the wire connection inspection tool 132 is brought into contact with the insulating block 52, and the wire 26 is pulled through the raising lever 29 (see FIG. 1). The raising base 40 is raised. Pull the raising lever 29 for a few seconds while the wire connection inspection tool 132 is sandwiched between the raising base 40 and the insulating block 52, and confirm that the connection between the drive shaft 27 and the wire 26 cannot be disconnected. Perform a mirror inspection.

As described above, since the endoscope cover member 31 of the present invention has the protective portion 33 having the outer diameter substantially equal to the outer shape of the locking piece 81, the external force is applied to the cover member 3.
Even if it acts on 1, the external force does not concentrate only on the locking piece 81, but also acts on the protective portion 33, so that the locking piece 81 does not receive an excessive force. That is, conventionally, the largest diameter of the cover member 31 is the portion of the locking piece 81. Therefore, an external force acts only on the locking piece 81 to damage the thin locking piece 81. However, in the cover member 31 of the present embodiment, the external force applied to the cover member 31 can be dispersed by the locking piece 81 and the protective portion 33, so that the force applied to the locking piece 81 is larger than that in the conventional case. It is reduced and the locking piece 81 is hard to break. Therefore, the attaching / detaching function of the cover member 31 is not impaired.

For example, the cover member 31 needs to be sterilized after use, and even when the cover member 31 is made disposable, it is necessary to sterilize the cover member 31 before use. When carrying out, the cover members 31 are packed in peel packs one by one and then supplied to the sterilization process, and then stored in the endoscope room for each peel pack. In this case, in the peel pack, the cover member 31 is inserted so that the protective portion 33 and the locking piece 81 are in contact with the inner surface of the peel pack. However, even in such a situation, an external force is always applied between the protective portion 33 and the locking piece 81. Dispersed in.

Further, the cover member 31 of this embodiment is shown in FIG.
As shown in FIG. 3, the forceps raising unit 53 is configured so that the raising base 40 is arranged so as to be exposed from the side.
At the time of configuration, it is possible to easily confirm whether or not foreign matter is mixed into the elevator housing portion or whether the elevator 40 or the like is correctly assembled.

FIG. 20 shows a second embodiment of the present invention. In the present embodiment, the outer diameter of the protection portion 33 is the locking piece 81.
Is larger than the outer diameter of. Other configurations are first
The same as the embodiment of In the case of this configuration, the cover member 3
Since the external force acting on 1 first acts on the protective portion 33, the risk of the locking piece 81 being damaged is further reduced as compared with the first embodiment.

FIG. 21 shows a third embodiment of the present invention. In the case of the present embodiment, the outer diameter of the protective portion 33 is smaller than the outer diameter of the locking piece 81, but the elastic deformation limit diameter of the locking piece 81, that is, the locking piece 81 is compressed and deformed to reach the elastic limit. It is larger than the outer diameter of the locking piece. Therefore, even if an external force acts on the locking piece 81, the external force is dispersed to the protection portion 33 before the locking piece 81 reaches the elastic limit, so that the damage of the locking piece 81 is prevented as much as possible.

[0060]

As described above, in the endoscope cover member of the present invention, the outer diameter of the protective portion reaches the elastic limit due to the elastic deformation limit diameter of the locking piece, that is, the locking piece being compressed and deformed. It is larger than the outer diameter of the locking piece when it was done. Therefore,
Even if an external force acts on the locking piece, the external force is dispersed to the protective portion before the locking piece reaches the elastic limit. That is, the external force that acts on the cover member does not concentrate only on the locking piece, but also acts on the protective portion, so that the locking piece is not subjected to excessive force. Therefore, the force applied to the locking piece is reduced compared to the conventional one,
The locking piece is hard to break.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an endoscope to which a cover member of the present invention can be attached.

FIG. 2 is a plan view of a distal end portion main body of an endoscope insertion portion and a cover member as a first embodiment which is attachable to and detachable from the distal end portion main body.

3A is a plan view showing a state in which a cover member is attached to the tip end main body, FIG. 3B is a sectional view taken along line EE of FIG. 3A, and FIG. 3C is D- of FIG. It is sectional drawing which follows the D line.

FIG. 4 is a cross-sectional view taken along the line FF of FIG.

5A is a plan view of the cover member according to the first embodiment of the present invention, and FIG. 5B is a side view of the cover member of FIG.

6A is a plan view of a cover member 31 and various members assembled to the cover member 31, and FIG. 6B is a side view of FIG. 6A.

FIG. 7 is a cross-sectional view taken along the line BB of FIG.

8 is a cross-sectional view showing a modified example of FIG.

FIG. 9 is a front view of a cover member.

FIG. 10 is a view in the direction of the arrow C in FIG.

FIG. 11 is a front view showing a state in which members such as a raising stand are attached to the cover member.

FIG. 12 is a side view of the cover member for explaining the method of protecting the wire tip portion.

13 is a plan view showing a modified example of the configuration of FIG.

FIG. 14 is a side view of the tip body of FIG.

FIG. 15 is a cross-sectional view at the insulating member position with the cover member attached to the distal end portion main body in the configuration of FIG.

FIG. 16 is a cross-sectional view at the raising base position with the cover member attached to the distal end body in the configuration of FIG. 13.

FIG. 17 is a schematic view showing a packed state of the forceps raising unit.

FIG. 18 is an explanatory diagram showing a method for adjusting the connection state of wires using a wire connection inspection tool.

FIG. 19 is a configuration diagram of a forceps raising base unit storage member.

20A is a side view of a cover member according to a second embodiment of the present invention, and FIG. 20B is a sectional view of FIG. 20A.

21A is a side view of a cover member according to a third embodiment of the present invention, and FIG. 21B is a front view of FIG.

[Explanation of symbols]

 31 ... Cover member, 33 ... Protecting portion, 81 ... Locking piece.

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[Procedure amendment]

[Submission date] May 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

Further, the guide tube is composed of an outer layer tubular member made of a tube body and an inner layer tubular member made of a closely wound coil body , and a forceps raising base, an operating wire and the inner layer tubular member are detachable. In order to facilitate the cleaning of these members, it is disclosed in JP-A-56-8030.
It is disclosed in the publication.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

The insertion portion 3 has a bending portion 5 that is bent by rotating an angle knob 6 provided on the operation portion 1, and a tip portion 4 provided at the tip of the bending portion 5. ing. The distal end portion 4 is provided with one opening of the forceps channel extending over the entire length in the insertion portion 3. The other opening of the forceps channel has a forceps opening 2 on the operating portion 1.
It is provided as 1. A forceps plug 22 can be attached to the forceps opening portion 21 as needed. The insertion portion 3 has a bend stopper 3 for preventing damage.
0 is provided at the end of the operation unit 1 side.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

An engaging hole 94 is provided at the rear end of the insulating block 52, and an engaging projection 95 is provided at the distal end of the distal end body 37 so as to correspond to the engaging hole 94. ing. Therefore, when the forceps raising unit 53 is attached to the tip portion main body 37, the engaging hole 94 of the insulating block 52 is
Since the engagement projection 95 of the tip portion main body 37 is engaged with, the rotation of the forceps raising unit 53 with respect to the tip portion main body 37 is restricted. After attaching the forceps raising unit 53 to the tip end main body 37, the ultra-thin portion is straddled over the locking piece 81 of the cover member 31 that engages with the concave groove 73 of the fixed cover 46 and the end portion 71 of the fixed cover 46. Film cover 100 (Fig. 3
It shows in (b). ) To prevent the cover member 31 from falling off.

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[Name of item to be corrected] Figure 5

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[Figure 5]

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[Name of item to be corrected] Figure 7

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[Figure 7]

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[Correction target item name] Figure 8

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[Figure 8]

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[Correction target item name] Figure 15

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FIG. 15

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[Correction target item name] Fig. 16

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FIG. 16

Front page continuation (72) Inventor Koji Nakamoto 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd.

Claims (1)

[Claims] 1. A substantially annular locking piece having elasticity that can be locked to a distal end side portion of an insertion portion of an endoscope, and is detachably attached to the distal end side portion of the insertion portion by using this locking piece. In the attachable endoscope cover member, a protective portion having an outer diameter larger than an elastic deformation limit diameter when the locking piece is compressed is provided.