JPS6327685Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an endoscope angle structure.

When inserting an endoscope into a body cavity to observe and treat affected areas such as tumors and polyps, operate the angle dial on the handle to adjust the rigid tip with the observation window to 4.
The observation window is curved in one direction or two directions so that the observation window faces the object to be observed. In order to manipulate the direction of the rigid tip part, the part following the rigid tip part has an angled structure in which a number of annular pieces are connected, and the angular structure can be controlled in a specific direction using the operating wire and the angle dial. It is curved to

By the way, when forming an angle structure by connecting a large number of pieces in series, it is necessary to connect these pieces so that they can flexibly curve as one without separating or shifting their positions. .

Regarding the connection of the pieces, conventionally, as shown in Fig. 1, the engaging parts of the pieces are swingably connected by a thin shaft, or as shown in Figs. 2 and 3. In addition, there was one in which the wire was passed through a connecting hole provided inside the bridge body.

However, the former technology requires a large amount of man-hours for processing and assembly, and the latter technology occupies a large amount of space, making it unsuitable for reducing the diameter of endoscopes.
Moreover, it lacks flexibility and has the disadvantage of being prone to wire breakage accidents.

The present invention was made to solve the above-mentioned drawbacks, and its purpose is to be easy to manufacture,
The object of the present invention is to obtain an angle structure for an endoscope that is suitable for reducing the diameter and does not cause disconnection accidents.

In order to achieve the above object, the present invention is characterized in that the bridge bodies are sewn together and connected by braided wire.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 is a perspective explanatory view of an embodiment of an angle structure of an endoscope according to the present invention, which is a type that can be bent in four directions, FIG. 5 is a partial cross-sectional view of FIG. 4, and FIG. 6 is a perspective explanatory view of an embodiment of an angle structure of an endoscope according to the present invention, which can be bent in four directions,
The figure shows a cross-sectional view of a type that is curved in two directions.
Reference numeral 1 denotes a piece, 2 denotes an engagement portion, 3 denotes a through hole, and 4 denotes a line.

Piece body 1 is made by punching out a thin plate of approximately 0.05 to 1.0 mm into a belt shape by press processing, and then punching this into a band shape of approximately 1.5 to 30.0 mm.
It is formed into an annular shape or a tube material, and a light guide, image guide, etc. (not shown) is inserted into the inside thereof. A plurality of consecutively arranged pieces 1 are formed with an engaging portion 2 formed by engaging one or two protruding pieces with each other, and the engaging portion 2 allows adjacent pieces 1 to be engaged with each other. They are pivotally engaged with each other. The engaging part 2
are arranged according to the number of curvature directions of the angle structure.

A through hole 3 is provided in the direction toward the center of the piece body 1 close to the engaging portion 2 . The through hole 3 can be formed by press working when punching out the element piece of the piece body 1, and the pair of engaging portions 2 are inserted through the through hole 3 through the filament 4.
are fastened together so that they can swing freely. Things to note are:
The through hole 3 is formed in the direction of the center of the piece body 1. As a result, the through hole 3 does not occupy any space, unlike a conventional wire holding portion, and is easy to process.

As shown in FIGS. 5 and 6, the flexible filament 4 is passed through so as to avoid the protruding portion of the engaging portion 2. This is to avoid damage caused by the engaging portion 2. Further, the fact that the total thickness of the engaging portion 2 and the filament 4 is extremely small greatly contributes to making the diameter of the endoscope smaller. As the filament 4, a braided wire made of fine tungsten wires knitted into a net shape is used. Traditional stainless steel wire is
It has high resistance to bending, permanent set, and fatigue.
However, tungsten braided wire has excellent tensile strength and abrasion resistance, and since it is a collection of fine wires, it can be bent freely and resists any bending. do not have. In addition, it can be easily deformed into a flat shape when subjected to pressure from other contents stored inside the piece 1, and will not cause damage to itself or others.

By continuously sewing the piece bodies 1 together with the filament 4 made of such a braided wire,
The number of work steps can be reduced to an extent that is incomparable to the conventional method. Moreover, since the total length of the sewn filaments 4 is long, even if it receives bending force, the load per unit length is small, and the bending force is not concentrated locally but is dispersed throughout. Ru.

Moreover, since the filament 4 is strong, it can be made even thinner and the internal space of the piece body 1 can be used effectively.

Note that a tungsten braided wire may be used for the operation wire (not shown), and the outer periphery of the piece body 1 is covered with a urethane tube or the like, but these are omitted from the drawing. Furthermore, as shown in FIG. 7, the engaging portion 2 may be provided inside the piece body 1, and the filament 4 may be passed through the outside.

As described above, according to the angle structure of the endoscope according to the present invention, the bridge bodies are sewn together and connected with the braided wire, thereby reducing the number of work steps, reducing the diameter of the endoscope, and preventing wire breakage accidents. can be realized, and can have a significant effect on improving endoscopic technology.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view showing a conventional angle structure, Fig. 2 is a sectional view showing another conventional example, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a diagram according to the present invention. An example of the angle structure of an endoscope, which is a perspective explanatory view of a type that curves in four directions, FIG. 5 is a partial cross-sectional view of FIG. 4, and FIG. 6 is a cross-sectional view of a type that curves in two directions. 7 are sectional views showing other embodiments. 1... Piece body, 2... Engaging portion, 3... Through hole, 4...
...Striae.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of piece bodies made of thin plates formed into an annular shape are arranged in series so as to be swingable, and a plurality of operating wires are arranged along the piece bodies, and the operation wires are operated. In the angle structure of an endoscope in which continuous pieces are bent in a desired direction by means of An angle structure for an endoscope, characterized in that a through hole is provided, and continuous piece bodies are sewn together and connected by passing a flexible filament through the through hole. 2. The angle structure of an endoscope as set forth in claim 1 of the utility model registration claim, characterized in that the filament is passed through avoiding the protruding portion of the engaging portion. 3. The angle structure of an endoscope according to claim 1, which is characterized in that a tungsten braided wire is used as the filament.