JPH0243361Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an endoscope bending operation device for bending the bending portion of an endoscope.

Generally, the insertion section of an endoscope is provided with a curved section,
There is a configuration in which the bending section is remotely operated to bend by rotating an operation knob of an operation section. Inside this type of endoscope, as shown in FIG. , and connect the tip ends of both operating wires 3, 3 to one end of each transmission wire 5, 5 via connecting members 4, 4, and connect the other ends of these transmission wires 5, 5 to each other. A bending operation device configured to pass through the bending portion and be fixed to the tip component is incorporated. by the way,
The conventional bending operation device includes the connecting members 4,
Guide plates 6, 6 for guiding the wires 4 in forward and backward directions are screwed to the substrate 7, etc., and by guiding the connecting members 4, 4 along the guide plates 6, 6, the operation wires 3, 3 and the transmission wire A pair of stoppers 9, 9, which have grooves 8 through which the operating wires 3 can be inserted, abut against and lock the respective connecting members 4, 4, are screwed onto the board 7, etc. There is an endoscope in which the bending angle of the bending portion of the endoscope is adjusted by regulating the amount of movement of the operating wires 3, 3 using these stoppers 9, 9.

However, in the conventional configuration described above, the guide plates 6, 6 and the stoppers 9, 9 are separately screwed to the board 7, which makes assembly and disassembly work troublesome and requires a large number of parts. However, it also had the disadvantage of high cost.

This invention was made in consideration of the above circumstances, and its purpose is to provide an endoscope bending operation device that can simplify the configuration, improve the efficiency of assembly and disassembly work, and reduce costs. There is a particular thing.

An embodiment of this invention will be described below with reference to FIGS. 3 to 5. FIG. 3 shows the entire endoscope 11, where 12 is an insertion section and 13 is an operation section. The insertion section 12 is formed from a tip forming section 14, a curved section 15, and a flexible tube section 16. Further, the operation section 13 is provided with an eyepiece section 17 and an operation knob 18, and a universal cord 19.
are connected. This universal code 19
A connector 20 is attached to the tip of the holder, and the connector 20 is used to connect to a light source device (not shown). Further, the operating knob 18 is fitted onto a rotating shaft 21. As shown in FIG. 4, the rotating shaft 21 has a base end rotatably attached to a base plate 22 provided inside the case of the operating section 13. The distal end of the rotary shaft 21 penetrates the case of the operation section 13 and projects to the outside, and the operation knob 18 is fitted into this projection. Further, the rotating shaft 21 includes an operating section 13.
A pulley (rotating body for operation) 23 is fitted inside. A notch 2 is formed on one outer surface of this pulley 23.
4 is formed. Further, a pair of operating wires 25, 25 are wound around this pulley 23 from opposite sides, and both operating wires 25, 25 are wound around the pulley 23 from opposite sides.
The base ends of the pulleys 23 are guided out from the notches 24 of the pulley 23 and fixed to the outer surfaces of the pulleys 23, respectively.
The respective tip ends of these two operating wires 25, 25 are fixed to columnar connecting members 26, 26, respectively. Further, one end portion of a transmission wire 27, 27 is fixed to each connecting member 26, 26, respectively. Both transmission wires 27, 27 are connected to the operating section 1.
3 and the inside of the flexible tube part 16,
Each other end portion passes through the inside of the curved portion 15 to form the distal end portion 1.
It is attached to 4.

On the other hand, the board 22 has a pair of slide members 28,
28 are provided respectively. Each slide member 28 is integrally formed with a stopper 29, a guide piece 30, and a mounting piece 31. A groove portion 32 is formed in the stopper 29, into which the operating wire 25 is inserted. This stopper 29 stops the connecting member 26 when the connecting member 26 moves toward the pulley 23.
6 to restrict movement of the operating wire 25. Further, the guide plate 30 is formed along the moving direction of the connecting member 26, and guides the connecting member 26 in the advancing/retracting direction when the connecting member 26 moves. Furthermore, a long hole 33 is formed in the mounting piece 31 in the same direction as the moving direction of the connecting member 26, and screws 34, 34 are inserted into the long hole 33.
It is attached to the substrate 22 by.

Therefore, in the case of the above configuration, the operation knob 1
When 8 is rotated clockwise as shown by the arrow in FIG. 3, the pulley 23 is also rotated in the same direction as shown by the arrow in FIG. As the pulley 23 rotates, the lower operating wire 25 in FIG. 4 is pushed out in the direction of the insertion section 12 (leftward in FIG. 4), and the upper operating wire 25 is pushed out in the direction of the pulley 23 (in FIG. (to the right). moreover,
In conjunction with the pushing and pulling operations of these operating wires 25, 25, the transmission wires 27, 27 are pushed and pulled via the connecting members 26, 26, respectively, and the curved portion 15 is moved as shown by the imaginary lines in FIG. The curve is manipulated. On the other hand, by rotating the operation knob 18 in the opposite direction (counterclockwise in FIG. 3), each of the operation wires 25, 25 can be pushed and pulled in the opposite direction. Can be operated to curve. Further, when the bending portion 15 is bent, both the connecting members 26, 26 are guided by the guide pieces 30, 30, respectively, so that the respective operation wires 25, 25 and the respective transmission wires 27, 27 can be moved forward and backward smoothly. Can be done. moreover,
By moving the slide members 28, 28 along the elongated holes 33, 33 of the mounting pieces 31, 31, the mounting position of the slide members 28, 28 on the substrate 22 can be changed as appropriate. Therefore, the positions of the stoppers 29, 29 are changed to the connecting member 26,
26 can be moved forward and backward, and the bending angle of the bending portion 15 can be adjusted as appropriate.

Thus, in the case of the structure described above, the slide member 2 in which the stopper 29 and the guide piece 30 are integrated
8, the number of parts can be reduced compared to the conventional one, the configuration can be simplified, and operations such as assembly and disassembly can be easily performed.

Note that this invention is not limited to the above embodiments. For example, as shown in FIG. 6, sawtooth-like uneven portions 31a may be formed on the lower surface of the mounting piece 31 of the slide member 28 to ensure the mounting state of the slide member 28 to the board 22. Furthermore, it goes without saying that various modifications can be made without departing from the gist of the invention.

As explained above, according to this invention, there is provided a stopper which restricts the amount of movement of the operating wire by coming into contact with the connecting member inserted between the operating wire and the transmission wire and moving in the axial direction. Since the guide piece that guides the connecting member in the advancing and retracting directions is integrated, and the guide piece integrated with the stopper is fixed so as to be movable in the axial direction, the number of parts can be reduced compared to the conventional method, and the configuration can be improved. Simplification can be achieved, and work such as assembly and disassembly can be made more efficient and costs can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example; Figure 1 is a plan view showing the entire bending operation device in partial cross section, Figure 2 is a perspective view of the main parts, and Figures 3 to 5. 3 shows an embodiment of this invention, FIG. 3 is a perspective view of an endoscope, FIG. 4 is a partially sectional plan view of the entire bending operation device, and FIG. 5 is a perspective view of the main parts. ,
FIG. 6 is a perspective view showing another embodiment. 11... Endoscope, 13... Operation section, 15... Curved section,
23... Pulley (rotating body for operation), 25... Operating wire, 26... Connection member, 27... Transmission member, 28... Slide member, 29... Stopper, 30... Guide piece.

Claims (1)

[Scope of utility model registration request] An operating rotating body is rotatably installed in the operating section of the endoscope, and the tip of the operating wire that is pushed and pulled as the operating rotating body rotates is connected to one end of the transmission wire via a connecting member. and the other end of the transmission wire is fixed to a bending part of the endoscope, and the bending part is operated to bend as the operating rotating body rotates by an external operation. The bending operation device for an endoscope includes a stopper that abuts the connection member and moves in the axial direction to restrict the amount of movement of the operation wire, and a guide piece that guides the connection member in the forward and backward directions. A bending operation device for an endoscope, characterized in that the guide piece is integrated with the stopper and fixed so as to be movable in the axial direction.