JP2663614B2 - Endoscope Angle Ring Connection Pin - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle ring connecting pin for pivotally connecting angle rings constituting an angle portion in an insertion portion of an endoscope to each other.

2. Description of the Related Art An angle portion in an insertion portion of an endoscope is configured by sequentially pivoting a plurality of angle rings, and attaching a protection net and an outer tube to the outside of the angle rings. Then, in order to connect between adjacent angle rings, a pair of upper and lower or left and right connecting portions is extended on both sides of each angle ring, and a pin hole is provided in this connecting portion,
The connecting portions protruding from the adjacent angle rings are overlapped so that the pin holes coincide with each other, and a connection is made by inserting a pin into the pin hole, and furthermore, in order to insert an operation wire through the pin. The one provided with the insertion hole is conventionally used.

Here, the angle ring connecting pin according to the prior art is provided with an insertion hole through which the operation wire is inserted into the peripheral body portion having a diameter larger than the pin hole, and a locking portion having a smaller diameter than the pin hole is continuously provided at the tip of the peripheral body portion. The pin is fixed to the pin by inserting a locking portion into the pin hole from the inside of the angle ring and caulking or welding the tip portion of the locking portion.

[Problems to be Solved by the Invention] As described above, the work of inserting the pin into the pin hole from the inside of the angle ring and attaching the pin is extremely troublesome, and if the caulking is performed from the outside inserted in this manner. When an external force is applied to the angle ring, the angle ring may be deformed. In addition, in a case where the pin is fixed by welding means or the like without using the caulking means, when a large force is applied to the operation wire at the time of an angle operation or the like, the pin falls out of the pin hole into the insertion portion. There are problems such as inconvenience.

The present invention has been made in view of the above points, and its purpose is to make it easy to assemble an angle ring and to prevent the angle ring from falling off from a pin hole provided in its connection part. To provide an angle ring connecting pin.

[Means for Solving the Problems] In order to achieve the above-mentioned object, an angle ring connecting pin according to the present invention has a head having a larger diameter than an opening diameter of a pin hole provided in a connecting portion of the angle ring. A peripheral body portion of a small hole is continuously provided from the pin hole opening diameter, and is formed by forming an insertion hole for inserting an operation wire into the peripheral body portion,
The present invention is characterized in that the peripheral body portion can be inserted into the pin hole from outside the angle ring.

[Operation] With this configuration, the pin can be inserted into the pin hole from outside the angle ring, and even if the pin needs to be fixed to the scale, Since it can be easily performed from outside by means such as welding, the angle ring can be easily assembled.

Also, when the angle ring is assembled and the operation wire is pushed and pulled to perform an angle operation in a state where the operation wire is inserted through the insertion hole provided in the peripheral body of the pin, a force acts on the pin in a direction of being pulled inward. However, since the head of the pin is formed with a larger diameter than the pin hole, it does not fall out of the pin hole.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the angle portion 10 of the endoscope has a frame structure formed by sequentially pivoting a plurality of angle rings 11, and a protection net 12 is provided outside the angle ring 11. The protective net 12 is covered with an outer layer 13 made of a slippery resin tube material. As is well known, built-in components such as a light guide, an image guide, a treatment tool insertion channel, and an air / water supply pipe are housed in the angle portion 10 and four (or two) operation wires 14 are provided. Is inserted.

Here, the four operation wires 14 described above are connected to the angle portions.
It is provided so as to form a pair on the upper, lower, left and right sides. When the upper and lower operation wires are pushed and pulled, the angle portion 10 is bent in the vertical direction, and when the left and right operation wires are pushed and pulled, the angle portion is bent. 10 will bend in the left-right direction. In this way, in order to be able to bend the angle portion 10, the angle ring 11, which forms the skeleton of the angle portion 10, is located at its left or right or up and down position as shown in FIG. A pair of connecting portions 11a, 11a projecting from both ends in the axial direction are formed, and a pin hole 15 for inserting the pin 20 is formed in each connecting portion 11a.

The pin 20 is, as shown in FIG.
The peripheral body 22 is provided with an insertion hole 23 through which the operation wire 14 is inserted. The head 21 has a larger diameter than the pin hole 15, and the peripheral body 22 has a smaller diameter than the pin hole 15.
In this way, the pin 20 pivotally connects the connecting portions 11a of the adjacent angle rings 11 to each other, and
The operation wire 14 can be positioned by inserting the operation wire 14 provided therein.

Next, a method of assembling the angle ring 11 configured as described above will be described.

First, the connecting portions 11a, 11a extending from the adjacent angle rings 11, 11 are overlapped with the pin holes 15 aligned. Then, angle ring the peripheral body part 22 of the pin 20
11 is inserted into the pin hole 15 from outside. And this pin 20
To fix the head, the head 21 of the pin 20 is
The connecting portion 11a located on the outer side of the angle ring 11 by welding using welding, welding means, bonding means, or the like.
Stick to As described above, the angle rings 11 are sequentially connected by the pins 20 to form the frame structure of the angle portion 10, and then the protection net 12 is applied thereto, and an applying agent is applied thereto, whereby the protection net is applied. 12 is fixed, and a skin layer 13 is further covered thereon.

As a result, an angle part 10 is formed, and one end thereof is connected to a flexible part connected to the main body operation part and a hard end part is connected to the other end, as is well known, so that a built-in component such as a light guide can be formed. Insertion hole and insertion hole provided in pin 20
By inserting the operation wire 14 through the endoscope 23, the endoscope can be assembled.

As described above, in connecting the angle ring 11, the pin 20 can be inserted from the outside thereof, and the pin 20 can be fixed to the angle ring 11 as it is or as necessary. The pin hole 15 in the outer connecting portion 11a of the connecting portion where the head 22 exposed to
Can be easily fixed by means such as welding, welding, or bonding around the periphery. Further, even when the pin 20 is fixed, no pressing force acts on the angle ring 11, so that its shape does not change.

Here, the pin 20 is configured such that its head 21 is in contact with or fixed to the head 21 with the outer one of the overlapped connecting portions 11a, 11a in the angle ring 11 adjacent to each other. Is not engaged with the inner connecting portion at all. However, the operation wire 14 is inserted through the insertion hole 23 in the peripheral body portion 22 of the pin 20, and the operation wire 14 is usually given a certain amount of tension. Since the force acts inward, the outer connecting portion is pressed by the head 21 of the pin 20 in the direction in which the outer connecting portion contacts the inner connecting portion. Accordingly, the angle ring having the inner connecting portion does not shift, and is kept in a stable state.

Further, the radial inward force acting on the pin 20 by the operation wire 14 is received by the contact portion between the head portion 21 of the pin 20 and the connecting portion 11a of the angle ring 11,
There is no risk that the pin 20 will fall out in this direction. On the other hand, the pin 20 is hardly affected by a radial outward force, and the protection net 12 and the outer skin layer 13 are provided outside the angle ring 11. Connect the head 21 of the pin 20 to the connecting part of the angle ring 11 by a simple method.
Even if it is fixed to 11a, there is no danger that the pin 20 will fall out.

[Effects of the Invention] As described above, according to the present invention, a pin for connecting an angle ring is provided with a head having a diameter larger than an opening diameter of a pin hole formed in a connection portion of the angle ring, and an opening diameter of the pin hole. It is configured with a smaller diameter of the peripheral body, and an insertion hole through which the operation wire is inserted is formed in the peripheral body, and the peripheral body is inserted into the pin hole from the outside of the angle ring. It can be done very easily without deformation, and the pin is fixed by simple means such as welding, welding or welding the head of the pin from the outside of the angle ring In addition, even if the pins are fixed by such simple means, there is no possibility that the pins fall out of the pin holes of the connecting portion.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a sectional view of an angle portion, FIG. 2 is an exploded perspective view of a connecting portion of an angle ring, and FIG. 3 is an external view of a pin. 10: Angle part, 11: Angle ring, 11a: Connection part, 14:
Operation wire, 15: pin insertion hole, 20: pin, 21: head, 22: body, 23: insertion hole.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuji Kogure 700, Konakacho, Sano-shi, Tochigi Pref. Sano Kiko Co., Ltd. JP, U)

Claims (1)

(57) [Claims] In order to pivotally connect an angle ring constituting an angle portion, connecting portions extending from adjacent angle rings are overlapped and inserted into pin holes provided in these connecting portions, and an operation wire is provided. In the one provided with an insertion hole through which, the head diameter larger than the opening diameter of the pin hole,
An endoscope, wherein a peripheral body portion having a diameter smaller than the opening diameter of the pin hole is continuously provided, and the insertion hole is formed in the peripheral body portion, so that the peripheral body portion can be inserted into the pin hole from outside the angle ring. Angle ring connection pin.