JPH04357919A - Device for preventing deformation of endoscope operating part - Google Patents

Abstract

PURPOSE:To reduce the weight and size over the entire part of an operating part by inserting a master plate into the paired master plate insertion grooves facing each other on the inside surface of a cylindrical casing and fixing the master plate to the front part and rear part casings. CONSTITUTION:The cylindrical casing 11 is divided and constitute to and of the front part casing 11a and the rear part casing 11b. A pair of the master plate insertion grooves 30 are formed on the inner periphery of the insertion parts to the front part casing 11a. The master plate 13a of an operating body 13 is inserted into the master plate insertion grooves 30, by which the position in the thickness direction is regulated. The part forward of the master plate insertion grooves 30 is fixed to the front part casing 11 a and the rear end part is fixed to the rear part casing 11b. The master plate 13 resists to prevent the deformation of the casing 11 even if the bending force in the transverse direction W of the master plate 13a is applied to the casing 11 in this way. The same holds true of the deformation in the thickness direction T of the master plate 13a.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to a device for preventing deformation of an operating section of an endoscope.

0002

BACKGROUND OF THE INVENTION [0003] The operating section of an endoscope is usually held with one hand, and the other hand is used to perform various operations such as bending the section to be inserted into the body. Therefore, the entire device is required to be lightweight and compact, and in particular, the operating section is required to be lightweight and compact. On the other hand, endoscopes are immersed in disinfectant solution after use.
A waterproof structure is required, and for this reason, it has become common to cover the entire operating section with a cylindrical casing.

Against this background, Japanese Patent Application Laid-Open No. 59-34238 aims to reduce the weight and size of the operating section without sacrificing its strength. a part body, the casing being subjected to compressive stress, and the operating part body being subjected to tensile stress;
A stopper is provided between the operating section main body and the casing to prevent the operating section main body from deflecting. Figures 4 and 5 show this structure, and the operation section 1
The operating section main body 13 holding the bending operation mechanism 12 etc. of the body insertion section is inserted into the cylindrical casing 11 of 0, and the rear end of the rear main plate 13a of the operating section main body 13 is connected to the casing 11 with the screw 14. It is fixed to the inside of the rear end portion, and the front end cylindrical portion 13b is fixed to the front end of the casing 11 with a tightening ring 15. 13c is the main plate 13a and the cylindrical part 13b
It is a pair of legs that connect the. When operating the bending operation mechanism 12, the operation section main body 13 has a
In order to prevent bending from occurring, a stopper member 16 is provided that contacts the inner surface of the casing 11.

According to the specification, when compressive stress is applied to the casing 11 and tensile stress is applied to the operating section main body 13 in this way, the casing 11 and the operating section main body 13 jointly exert their strength. The operation part 10 can be made light and thin, and a durable structure that is resistant to compression and bending can be obtained.In particular, by providing the stopper member 16, deformation of the operation part main body 13 is prevented. For this reason, the operating section main body 13 can be made thin and compact. In the figure, 17 is an in-body insertion part connected to the front part of the operating section 10, 18 is an eyepiece device provided at the rear part of the same, and 19 is an operating section 10.
This is the forceps insertion port provided at the front of the device. As is well known, the body insertion part 17 includes an image transmission optical fiber bundle, an illumination optical fiber bundle,
Well-known elements such as a forceps channel are housed, and an image formed by an objective lens at the tip of the intracorporeal insertion section 17 is observed by an eyepiece 18. Further, when the operating shaft 20 of the bending operation mechanism 12 is rotated by the operating lever 21, the bending portion at the distal end of the body insertion portion 17 is operated to bend via the operating wire 22.

However, even if the endoscope proposed in JP-A No. 59-34238 has the effect of preventing deformation of the operation section main body 13, it is difficult to prevent the main plate 13 of the operation section main body 13 from deforming.
The deformation of the casing 11 is only prevented in the thickness direction T of the main plate 13a, but the deformation of the casing 11 cannot be effectively prevented in the width direction W of the main plate 13a. That is, in order to reduce the weight and size of the entire operating section 10, it is desirable that not only the operating section main body 13 but also the casing 11 be made thin.
Deformation of the casing 11 in the width direction W can hardly be prevented, and therefore the casing 11 must still be formed to have a thickness necessary to prevent deformation in this direction.

[0006]

OBJECTS OF THE INVENTION The present invention provides an operation section that can strengthen the cylindrical casing of an endoscope operation section without increasing the thickness of the operation section itself, thereby further reducing the weight and size of the entire operation section. The purpose is to obtain structure.

[0007]

SUMMARY OF THE INVENTION The present invention was made based on the idea of utilizing the main plate of the operating section body housed within the cylindrical casing to strengthen the cylindrical casing.

[0008] The present invention provides an endoscope operation system that includes an operating section main body having a main plate that supports a mechanical section such as a bending operation mechanism of a body insertion section, and a cylindrical casing that houses and fixes the operating section main body. In the section structure, a pair of opposing main plate insertion grooves is formed on the inner surface of the cylindrical casing, and the cylindrical casing is divided into a front casing and a rear casing, and the main plate of the operating section main body is It is characterized in that it is inserted into the pair of parent plate insertion grooves, the portion in front of the parent plate insertion groove is fixed to the front casing, and the rear end portion of the parent plate is further fixed to the rear casing.

[0009] According to this structure, the main plate, whose front part from the main plate insertion groove is fixed to the front casing and the rear end thereof to the rear casing, has a section modulus with respect to the center line in the width direction that is thicker. Since it is much larger than that with respect to the center line in the direction, deformation of the main plate of the cylindrical casing in the width direction is effectively prevented, and therefore, the necessary strength can be maintained even if the rear casing is made thin. Furthermore, since the main plate and the rear casing are integrated in the thickness direction of the main plate, the rear casing is also strengthened in the thickness direction of the main plate. At the same time, the main plate is also reinforced by this rear casing, so that the main plate can also be made thin.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. 1 and 2 omit illustrations of various mechanisms supported on the operating section main body 13 and only show the relationship between the operating section main body 13 and the cylindrical casing 11.
Reference numeral 3 denotes a rear main plate 13a, a front cylindrical part 13b, and a pair of legs 1 connecting the main plate 13a and the cylindrical part 13b.
It consists of 3c. On the other hand, the cylindrical casing 11 is divided into two parts: a cylindrical front casing 11a whose distal end is connected to the body insertion part 17, and a rear casing 11b whose rear end is connected to the eyepiece 18. At the front end of the rear casing 11b, a pair of parent plate insertion grooves 30 are formed on the inner periphery of the insertion portion into the front casing 11a. That is, the rear end of the front casing 11a is
There is a stepped hole 32 that constitutes a housing portion for the O-ring 31, and the tip of the rear casing 11b is an insertion portion 33 that is inserted into the stepped hole 32. A parent plate insertion groove 30 is formed in each of the holes.

The main plate 13a of the operating section main body 13 is inserted into this insertion groove 30, and its position in the thickness direction is regulated. The upper and lower ends of the main plate 13a may be brought into contact with the bottom of the insertion groove 30, but a slight gap is always maintained so that the upper and lower ends of the main plate 13a come into contact with the bottom of the groove 30 when the casing 11 is slightly deformed. You can. The rear end of this main plate 13a is
It is fixed to the inner surface of the eyepiece device 18 of the rear casing 11b by screws 14, and is fixed to the inner surface of the eyepiece device 18 of the rear casing 11b, and
That is, the portion of the main plate 13a in front of the insertion groove 30 is fixed to the front casing 11a with the tightening ring 15. As a result, the O-ring 31 is compressed between the front casing 11a and the rear casing 11b, and both casings 11
Liquid tightness between a and 11b is ensured.

As described above, the main plate 13a is inserted into the main plate insertion groove 30 of the casing 11, and the main plate insertion groove 3
When the front part from 0 is fixed to the front casing 11a and the rear end part is fixed to the rear casing 11b, the casing 1
1, even if a bending force is applied to the main plate 13a in the width direction W, the main plate 13a resists, so that the casing 11 does not easily deform in the same direction, and the rear casing 11b and the front casing 11a is the rear casing 1
They will not separate due to the bending moment applied to 1b. In other words, this bending moment is received by both the rear casing 11b and the main plate 13a. Moreover, the main board 1
3a and the insertion groove 30 can effectively prevent the rear casing 11b from separating from the front casing 11a. Also, regarding deformation of the main plate 13a in the thickness direction T, since the casing 11 is reinforced by the main plate 13a, deformation is less likely to occur compared to the case where the main plate 13a is not inserted into the insertion groove 30. Therefore, it is possible to make the casing 11 thin, and the operation part 1
Helps make the 0 lighter and smaller.

The present invention has been described above from the viewpoint of strengthening the casing 11, but when viewed from the operating section main body 13, the main body 13 is reinforced by the casing 11, so the operating section main body 13, especially its Even if the parent plate 13a is made thinner, the necessary strength can be obtained.

In the above embodiment, only a pair of parent plate insertion grooves 30 are provided on the inner surface of the casing 11.
If multiple pairs of parent plate insertion grooves 30 are provided in the longitudinal direction of 1,
Furthermore, the casing 11 and the operating section main body 13 can be strengthened.

[0015] Note that the operating unit main body 13 explained in the above embodiment
The shape and the means for fixing the same are merely examples, and the present invention is not concerned with the shape or the means for fixing the same.

[0016]

As described above, the device for preventing deformation of an endoscope operating section of the present invention has a pair of opposing parents on the inner surface of a cylindrical casing in order to insert and fix an operating section having a parent plate. At the same time as forming a plate insertion groove, this cylindrical casing is divided into a front casing and a rear casing, and the front part of the main plate inserted into the main plate insertion groove is used as the front casing, and the rear end is used as the front casing. Since they are each fixed to the rear casing, the cylindrical casing and the main plate are strengthened together by their engagement with each other. In other words, it resists the bending moment that tends to separate the front and rear casings, so even if the thickness of the cylindrical casing and the parent plate are made thinner, there is no loss in strength, and the product has excellent strength despite being small and lightweight. It is possible to obtain an endoscope operating section that has a similar structure.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view taken along line A-A in FIG. 2, showing an embodiment of the deformation prevention device for the operating section of an endoscope according to the present invention.

FIG. 2 is a longitudinal cross-sectional view of a main part of an operating section showing an embodiment of the present invention.

FIG. 3 is a plan view showing an example of the overall structure of an endoscope.

FIG. 4 is a longitudinal sectional view showing an example of the structure of the operating section of a conventional endoscope.

5 is a sectional view taken along line BB in FIG. 4. FIG.

[Explanation of symbols]

10 Operation section 11 Tubular casing 11a Front casing 11b Rear casing 13　Operation unit main body 13a Main board 17 Internal insertion part 18 Eyepiece device 30 Main plate insertion groove

Claims (1)

[Claims] 1. An endoscope operating section comprising: an operating section main body having a parent plate that supports a mechanical section such as a bending operation mechanism of a body insertion section; and a cylindrical casing that houses and fixes the operating section main body; The cylindrical casing has a pair of parent plate insertion grooves facing each other on its inner surface, and is divided into a front casing and a rear casing. An endoscope that is inserted into a plate insertion groove, a portion in front of the main plate insertion groove is fixed to the front casing, and a rear end portion of the main plate is fixed to the rear casing. Deformation prevention device for the operating section.