JPH11216103A - Head swinging mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head swinging mechanism for swinging a head and returning to the original liner shape easily and surely by operation of a control lever and make the diameter of a body insert part shorter. SOLUTION: The mechanism is provided with a rod 5 which is connected a base end of wire for swinging W, a rotating board 6 and a crank rod 7 which makes the rod 5 move to the base end side by the axial rotation of the rotating board 6. By swinging a control lever 8 which is connected to the rotating board 6, rotating the rotating board 6 is rotated on its axis, thereby pulling the rod 5 to the base end side and pulling the wire for swinging W to the base end side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing mechanism used for an endoscope or the like.

[0002]

2. Description of the Related Art Generally, in an endoscope, a swing mechanism is mounted on a base grip so that a distal end of an insertion portion in the body swings. That is, the oscillating mechanism operates the operating lever provided outside the proximal grip to pull the oscillating wire inserted into the body insertion portion toward the proximal end and shake the head, For example, a turntable is mounted on the base grip, a wire for oscillating is connected to the turntable, and by operating an external operation lever, the turntable is rotated to pull the wire for oscillating, and the neck is pulled. It was a shake. In this case, both ends of the oscillating wire are connected to the tip oscillating portion via the rotating disk, and the oscillating in two directions is enabled.

[0003]

However, in the above-mentioned conventional mechanism, the outer diameter of the insertion portion in the body cannot be made very small, and a unidirectional swing of the endoscope may be sufficient. On the contrary, in some cases, the operation is easier when the head is swung only in one direction.

Accordingly, an object of the present invention is to provide a swing mechanism that enables simple and reliable swinging in one direction.

[0005]

In order to achieve the above-mentioned object, a oscillating mechanism according to the present invention comprises a rod having a base end of an oscillating wire connected thereto, a turntable, and an axis of the turntable. A crank rod for moving the rod to the proximal end side by pivoting around a center; an operating lever connected to the rotary plate and rotating the rotary plate around its axis by a swing operation thereof; It is provided with.

In another oscillating mechanism, a rod having a proximal end of a oscillating wire connected thereto, a rotating disk, and a rotation of the rotating disk about its axis cause the rod to be mounted on the proximal end side. An operating lever connected to the rotating disk and rotating the rotating disk around its axis by a swing operation thereof;
A guide body for guiding the reciprocation of the rod in the axial direction.

Another oscillating mechanism includes a rod provided with a base end of a oscillating wire, a turntable, and a rotation of the turntable about its axis to move the rod to the base end. An operating lever connected to the rotating disk and rotating the rotating disk around its axis by a swing operation thereof;
And an overload preventing spring for the oscillating wire.

[0008]

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

FIGS. 1 and 2 show a oscillating mechanism according to the present invention. This oscillating mechanism is provided on a proximal grip 1 of an endoscope shown in FIG. That is, the endoscope is provided with the proximal grip 1.
A body insertion portion 2 protruding from the proximal grip 1,
And a oscillating part 3 is formed at the distal end of the body insertion part 2.

For example, a swinging wire W (see FIGS. 1 and 2), an image guide and a light guide (not shown) are inserted into the body insertion portion 2. The image guide has a distal end connected to an objective lens provided at the distal end of the oscillating unit 3, a proximal end connected to an eyepiece provided at the proximal grip 1, and a light guide having a plurality of light guides. The fiber guide is made up of a plurality of fiber strands, the tip of which reaches the tip of the oscillating part 3, and the base end of which is inserted into the light guide plug between the branches branched from the base grip 1. To irradiate the light from this light to the observed part and the like. The distal ends of the image guide and the light guide are fixed to the distal end of the swing unit 3.

As shown in FIG. 4, a branch tube portion 30 protrudes from the base end grip 1, and forceps, a laser fiber, or the like can be inserted from the branch tube portion 30, for example.
Further, a focus adjustment dial 31 is provided on the base end side of the base end grip 1.

The base wire of the oscillating wire W is connected to the oscillating mechanism according to the present invention, and the operation of the oscillating mechanism pulls the oscillating wire 3 to swing the oscillating portion 3. Shake your head by moving it.

As shown in FIGS. 1 and 2, the oscillating mechanism includes a rod 5 having a base end of an oscillating wire W connected thereto and a turntable 6.
And the rotation of the turntable 6 about its axis, the rod 5
And a control lever 8 connected to the rotary disk 6 for rotating the rotary disk 6 about its axis by a swing operation.

That is, the turntable 6 has its axis 10 rotatably held inside the proximal grip 1, and
A base end of the operation lever 8 is connected to an end of the shaft 10 protruding from the shaft. Specifically, the operating lever 8 is provided with a rising piece 11 along one surface (the back surface in this case) of the proximal grip 1.
And a curved piece 12 protruding from the upper end of the rising piece 11 and extending along the upper surface of the base grip 1. The whole is substantially inverted L-shaped, and the base end of the rising piece 11 protrudes. It is connected to the end of the shaft 10. In addition, a non-slip 13 including an uneven portion is provided on the upper surface of the curved piece 12.

Therefore, if the curved piece 12 of the operation lever 8 is swung in the direction of the arrow A (axial direction) in FIG. Turntable 6
Rotates in the direction of arrow B. Also, as shown in FIG. 1, when the operating lever 8 is swung in the reverse direction as shown by the arrow C from the rotated state to stand up, the turntable 6 is rotated in the reverse direction as shown by the arrow D. And return to the original state.

1 and 2 in the proximal grip 1.
As shown in FIG. 3, a holding substrate 15 is provided, and the holding substrate 15
The rod 5 is disposed along the. That is, on the holding substrate 15,
A guide body 16 formed of a cylindrical body is provided, and the rod 5 is inserted into the guide body 16 so as to be able to reciprocate along the axial direction thereof. In addition, the rod 5 has a guide body 16.
An overload prevention spring 17 made of a coil spring is externally fixed to the distal end. That is, when the rod 5 is pulled toward the proximal end, the overload preventing spring 17 comes into contact with the guide body 16 and regulates the movement of the rod 5 toward the proximal end.

The crank rod 7 is, as shown in FIG.
A base end 20 connected to a shaft 19 protruding from the turntable 6;
The distal end 21 is connected to the proximal end of the rod 5, and a bent portion 22 connecting the distal end 21 and the proximal end 20 is provided. That is, a mounting piece 23 is provided at the base end 20 and a mounting piece 24 is provided at the distal end 21. The mounting piece 23 is brought into contact with the end surface of the shaft 19, and the mounting piece 25 such as a screw is used. Attach to this shaft 19 and attach the mounting piece 24
The rod 5 is superimposed on the mounting piece 26 at the base end and connected to the mounting piece 26 with a mounting tool 27 such as a bolt-nut combination. At this time, the mounting piece 23 of the base end 20 is swingable with respect to the end face of the shaft 19, and the mounting piece 24 of the distal end 21 is swingable with respect to the mounting piece 26. .

Therefore, when the operation lever 8 is swung from the state shown in FIG. 1 and the turntable 6 is rotated as shown by the arrow B, as shown in FIG. Accordingly, the rod 5 is pulled toward the proximal end, and the oscillating wire W is pulled toward the proximal end. That is, the tip swing unit 3 swings and shakes the head.

If the operating lever 8 is made upright as shown in FIG. 1 from this state, the turntable 6 rotates in the direction of arrow D, and the crank rod 7 moves as shown by arrow F. 5 is pressed to the tip side. For this reason, the tip swing part 3
Swings and returns to the original linear shape.

As described above, by operating the operation lever 8, the head can be shaken or returned to the original straight shape. Further, during the swing operation, the rod 5 reciprocates while being guided by the guide body 16, so that the movement of the swing wire W is stabilized, and the swing operation is stabilized. Also, a spring for overload prevention
Because of the provision of 17, the excessive weight does not act on the oscillating wire W, and the useful life of the oscillating wire W is extended.

[0021]

According to the present invention, the following significant effects can be obtained by the above-described structure.

According to the first aspect, by operating the operation lever 8, the head can be easily and reliably shaken or the original straight shape can be restored. In addition, this is a one-way swing in which only one swing wire W is inserted into the body insertion portion 2 such as an endoscope in which the body swing mechanism is used, and the diameter of the body insertion portion 2 is reduced. Can be achieved. Furthermore, the entire mechanism can be configured with a simple link mechanism, which facilitates assembly,
Moreover, it is less damaged and has excellent durability.

According to the second aspect, in addition to the effect of the first aspect, the movement of the rod is stabilized and the swing operation can be performed more reliably.

According to the third aspect, in addition to the effect of the first aspect, no excessive external force acts on the oscillating wire W, and the oscillating operation can be stably performed for a long period of time.

[Brief description of the drawings]

FIG. 1 is a front view of a swing mechanism according to the present invention.

FIG. 2 is a plan view.

FIG. 3 is a front view of a swinging state.

FIG. 4 is an overall explanatory diagram of the endoscope.

[Explanation of symbols]

 5 Rod 6 Turntable 7 Crank rod 8 Operating lever 16 Guide body 17 Spring for overload prevention W Wiring wire

Claims (3)

[Claims] 1. A rod having a base end of a oscillating wire connected thereto, a turntable, and a crank rod for moving the rod to the base end by turning the turntable around its axis. A swing lever, comprising: an operation lever connected to the rotating disk and configured to pivot the rotating disk about its axis by a swing operation thereof. 2. A rod on which a base end of a swinging wire is continuously provided, a turntable, and a crank rod for moving the rod to the base end side by rotating the turntable around its axis. An operating lever, which is connected to the rotating disk and rotates the rotating disk around its axis by a swing operation thereof, and a guide body for guiding reciprocation of the rod in the axial direction. A swing mechanism characterized in that: 3. A rod on which a base end of a swinging wire is continuously provided, a turntable, and a crank rod for moving the rod to the base end side by rotating the turntable about its axis. An operating lever connected to the rotating disk and rotating the rotating disk around its axis by a swing operation thereof; and an overload preventing spring for the oscillating wire. Swing mechanism.