JPH0632083Y2 - Knob for bending the endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bending operation knob for controlling the bending of the tip of an insertion portion to be inserted into an observation target portion.

[Prior Art] Endoscopes are widely used for observing the inside of body cavities such as the stomach and intestines or the inside of equipment cavities such as aircraft engines. As such an endoscope, the one as shown in FIG. 6 is known, which is composed of a hand operation part 1 and an insertion part 2 to be inserted into an observation target part. Has been formed. In the hand operation part 1, the tip of the insertion part 2 is moved up and down,
Knobs 100 and 101 for bending left and right are provided, and by rotating these knobs 100 and 101, the tip of the insertion portion 2 is bent vertically and horizontally.

[Problems to be solved]

In the conventional knobs 100 and 101, as shown in FIG. 6, a plurality of protrusions 100A and 101A are formed at equal intervals as a clue for rotating the knobs 100 and 101 with the belly of the thumb. The thumbs are put on the protrusions 00A and 101A to rotate the knobs 100 and 101, but in order to rotate the knobs 100 and 101 beyond the movable range of the thumbs, once the thumbs are separated from the protrusions 100A and 101A and the next position is reached. Protrusion 10
The thumb had to be applied to 0A and 101A, but when released, the bent insertion portion tip acted to return and the knobs 100 and 101 sometimes returned. In order to prevent such a situation, hold the gripping portion 3 above and hold the knobs 100 and 10 with two thumbs, the index finger or the middle finger.
I was trying to grab one. At that time, when trying to rotate the knobs 100, 101 with two fingers such as the thumb and the index finger or the middle finger, the action on the thumb side is the main, and when the index finger (or the middle finger etc.) is subordinate, the thumb is the knob 10
When rotating 0, 101 in one direction, the index finger etc.
00A, 101A get in the way and the protrusions 100A, 101A
I had to separate the index finger etc. from the knobs 100, 101 at this point. Therefore, the operability is poor, and it is a cause of finger fatigue.

Therefore, in this invention, when the knob is operated with two fingers, the index finger or the like comes into contact with the side surface of the knob during rotation of the knob to prevent the knob from returning, which is excellent in operability and reduces finger fatigue. It is an object to provide a knob for bending an endoscope.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention has three or more protrusions formed on at least a half circumferential surface of a side surface of a knob at substantially predetermined intervals, and the same half is formed on the remaining half circumferential surface of the side surface of the knob. At least one of the portions where the protrusion is to be formed is configured to be lacking.

[Action]

In this invention, when rotating the knob, the thumb can be rotated only in one direction, and the index finger etc. can be pressed against a place without a protrusion, and when the knob is rotated beyond the operation range of the thumb, the index finger etc. You can prevent the knob from returning. In addition, since the index finger or the like is kept in contact with a portion having no protrusion, it is not necessary for the index finger or the like to get over the protrusion one by one, and finger fatigue is reduced.

〔Example〕

A preferred embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, an example in which the present invention is applied to one knob 4 of the two knobs 4 and 5 can be applied to both knobs 4 and 5, as a matter of course. In this embodiment, the knobs 4 and 5 are provided in the hand operation section 1 so that the knobs 4 and 5 partially overlap the area of the grip portion 3. In FIG. 1, reference numeral 6 indicates a universal code including a light guide, and reference numeral 7 indicates a button for air supply, water supply or suction or a camera shutter.

As shown in FIGS. 2 and 3, the knob 4 to which the present invention is applied has four protrusions 4A formed at intervals of 60 °.
Within the range of 0 °, the protrusion 4A does not exist. The arcuate portion 4B having no protruding portion 4A is formed in a wavy shape so as not to slip when it is held by an index finger or the like. In this embodiment, the arcuate portion 4B is 120 °, but the initial purpose can be achieved by forming the arcuate portion 4B in the range of about 90 °. Further, the protrusions 4A need not be formed at equal intervals.

FIG. 4 and FIG. 5 show a state at the time of operation. In the state shown in FIG.
Is rotated, and the index finger or the like is brought into contact with the circular arc portion 4B. When the thumb moves to the next protrusion 4A, the knob 4 will not return if the circular arc portion 4B is held by the index finger or the like. Since the index finger is in contact with the circular arc portion 4B and moves while contacting the circular arc portion 4B, it is not necessary to separate the index finger or the like from the knob 4 due to the presence of the protrusion as in the conventional case. Further, the index finger or the like may not only be kept in contact with the circular arc portion 4B, but the knob 4 may be rotated with the thumb.

〔effect〕

As described above, according to the present invention, three or more protrusions are formed at substantially predetermined intervals on at least a half circumferential surface of the side surface of the knob, and the other half circumferential surface of the side surface of the knob has the same shape. Since at least one of the portions where the protrusion is to be formed is lacking, by pressing a finger other than the thumb against the portion where the protrusion is missing, the operability of the knob is significantly improved and It is no longer necessary to release the fingers other than the thumb from the knobs each time the screams, and finger fatigue is reduced.

[Brief description of drawings]

1 is a front view showing a preferred embodiment of the present invention, FIG. 2 is a front view of a knob, FIG. 3 is a sectional view taken along line III-III in FIG.
FIG. 4 and FIG. 5 are explanatory views when the knob is operated, and FIG. 6 is a perspective view showing a conventional example. 1 ... Hand operation part, 2 ... insertion part, 4 ... knob, 4A ... projection part.

Claims (1)

[Scope of utility model registration request] 1. A bending operation knob of an endoscope provided on a hand operation section for bending a tip of an insertion section to be inserted into an observation target section, wherein at least a half peripheral surface of a side peripheral surface of the knob is substantially predetermined. An endoscope characterized in that three or more protrusions are formed at intervals, and at least one of the portions where the similar protrusions are to be formed on the remaining half peripheral surface of the knob is missing. Knob for bending operation.