JPH0340241Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mantle tube for a fiberscope used for joints such as the knee.

[Conventional technology]

Conventionally, for example, for the gastrointestinal tract, a fiber scope consisting of a hard part on the proximal side and a soft part on the distal side, in which only the distal end of the flexible part is bent, is connected to a fiberscope body with a built-in optical system. By connecting the light source device of the main body, inserting a fiber into the digestive tract, and bending the tip of the flexible part of the fiber by operating a lever provided on the main body, the digestive tract can be directly viewed with a wide field of view. inspect it, or attach a video camera or camera to the main unit and take pictures.
Furthermore, a fiberscope is commonly used to perform treatment and sample collection using forceps or the like while viewing directly. The fiber is provided with a plurality of holes, such as a slide guide hole, an image transmission hole having an objective lens at its tip, a liquid feeding hole, and a liquid absorption hole.

[Problem that the invention attempts to solve]

However, the fiberscope as mentioned above,
Until now, it has not been used for joints such as the knee.
This is because joints are hard, unlike the digestive tract, so it is impossible to insert a fiber with a bendable tip into a joint without damaging the fiber. On the other hand, scopes made entirely of hard tubes have a problem in that they have a narrow field of view.

This invention solves the above-mentioned problems and allows for intra-articular observation, photographic inspection, and recording with a wide field of view without damaging the fibers, with only slight modifications to the general fiberscope body. The purpose is to provide a mantle tube for

[Means for solving problems]

In this invention, the main body of the fiberscope with a built-in optical system consists of a hard part on the base side and a soft part on the distal end, and only the flexible part on the distal end is a mantle of a fiberscope for joints that connects a flexible fiber. An outer tube that is removably fixed to the main body, which is a tube, and an inner tube that covers the proximal side of the bent portion of the fiber are arranged concentrically, and the proximal end of the inner tube is connected to the outer tube. A sliding tube is fitted into this outer tube so as to be able to slide in the axial direction, and a proximal end of an insertion tube that slidably covers the inner tube is provided integrally with this sliding tube. A knob for regulating the stroke of the sliding tube and the insertion tube is provided on the sliding tube in a range where the tip of the tube moves between the tip of the inner tube and the tip of the fiber or in a range close to this, and the knob is formed on the outer tube. It is inserted into a long hole and protrudes from the outer periphery of the outer cylinder.

[Effect]

The outer tube according to the present invention has an outer tube fixed to the fiberscope body, and when the insertion tube is pushed out, the fiber is covered to the tip by the insertion tube, and in this state, it can be inserted into a joint such as a patient's knee. By inserting the insertion tube into the inner tube, the fiber is not damaged, and by subsequently retracting the insertion tube, the tip of the soft portion of the fiber protrudes from the tip of the insertion tube and the inner tube. In this state, similar to commonly used fiberscopes, the tip of the flexible part of the fiber is bent by the operation on the main body side, and recording and inspection by direct viewing or photography can be performed with a wide field of view. be able to. Afterwards, with the insertion tube retracted,
Alternatively, the part inserted into the joint can be pulled out while being pushed out again. Therefore, by using the mantle tube of the present invention, joints can be inspected with a fiberscope, and the mantle tube can be added to the main body, which has the same basic structure as a general fiberscope, making the design easier. , easy to manufacture, and
It is also preferable from a sanitary perspective because the mantle can be removed from the main body for cleaning and disinfection.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a fiberscope main body, and 2 is a mantle tube. The fiberscope main body 1 has a built-in optical system (not shown), a cord 3 connected to a light source device is inserted into one side, and a camera (not shown) is detachably attached to the distal end. A fiber 4 extends from the tip. The fiber 4 is formed by a hard part 4a on the base side fitting and fixing a metal cylinder to the outer periphery, and a distal end of a soft part whose outer periphery is covered with a coating having a certain degree of rigidity on the distal end side of the hard part 4a. Part 4b
and a tip portion 4c of a flexible portion whose outer periphery is covered with a flexible covering such as rubber are continuously provided, and only the tip portion of the flexible portion can be removed by operating a lever 5 attached to the main body 1. is configured to be appropriately bent in any direction. The reason why the fiber 4 is constructed as described above is that the material of the fiber is relatively brittle and tends to break or age if it is bent rapidly. Further, the basic structure of the main body 1 described above is similar to that of a general fiberscope main body, but a mantle tube attachment portion 6, which will be described later, is provided on the outer periphery of the extending portion of the fiber 4.

As shown in FIGS. 1 and 2, the mantle tube 2 is
The main part is made of metal such as stainless steel,
The proximal end of the inner tube 8 is concentrically fixed to the proximal end of the outer cylinder 7, and a sliding cylinder 9 is fitted in the outer cylinder 7 so as to be slidable in the axial direction. A proximal end portion of an insertion tube 10 that slidably covers the inner tube 8 is integrally provided. Elongated holes 11 and 12 are formed in opposing surfaces of the outer cylinder 7, a knob 13 fixed to the sliding cylinder 9 is inserted into one elongated hole 11, and a stopper screw 14 is inserted into the other elongated hole 12. There is. That is, as shown in FIG. 3, the knob 13 is inserted into the long hole 11 from outside the outer cylinder 7.
The head 15 of the pin 15 passed through and tightened to the sliding tube 9
a and the bottom of the recess 16a of the knob 16 slidably fitted onto the pin 15, a spring 17 housed in the recess 16a is inserted, and the boss 16 of the knob 15 is inserted.
The knob cylinder 16 is pressed against the outer periphery of the outer cylinder 7 by the spring 17 so that the knob b is removably engaged with the recesses 7a and 7b provided on the outer periphery of both ends of the elongated hole 11 of the outer cylinder 7. . Further, the stopper screw 14 is connected to the outer cylinder 7.
It is passed through the elongated hole 12 from the outside and tightened to the sliding tube 9,
A washer 18 fitted onto the screw 14 is inserted between the head 14a of the screw 14 and the outer periphery of the outer cylinder 7.
A liquid suction port 20 having a socket 19 is provided in the outer tube 7, and this liquid suction port 20 communicates with the inside of the inner tube 8. A coupling ring 21 is fitted to the proximal end of the outer tube 7 so as to be rotatable but immovable in the axial direction, and is removably engaged with the outer tube attachment portion 6 of the main body 1, as shown in FIG. Thus, the mantle tube 2 is detachably fixed to the main body 1. That is, a protrusion 7c that engages with a notch 6a provided on the outer periphery of the mounting portion 6 is provided on the base end surface of the outer cylinder 7, and a protrusion 7c that engages with a notch 6a provided on the outer periphery of the mounting portion 6 is provided, and a protrusion 7c that engages with a notch 6a provided on the outer periphery of the mounting portion 6 is provided with a protrusion 7c that corresponds to a pair of notch grooves 6b provided on the outer periphery of the mounting portion 6. Pair of locking pieces 2
1b is the end flange portion 21b of the coupling ring 21
are provided in the notch 6a of the mounting portion 6 and the notch groove 6.
An annular groove 6c into which the end flange portion 21a fits is formed on the proximal side of the coupling ring 21, and a rotating rod 21c is fixed to the outer periphery of the coupling ring 21.

As shown in FIG.
from the tip side, align the locking piece 21b of the coupling ring 21 with the notch groove 6b of the mounting part 6 of the main body 1,
Align the protruding piece 7c of the outer cylinder 7 with the notch 6a of the mounting part 6, push the coupling 21 into the mounting part 6, and insert the end flange part 21b of the coupling 21 into the mounting part 6.
By locking the coupling ring 21 in the annular groove 6c and rotating the coupling ring 21 by holding the rotation rod 21c, the outer tube 2 is connected to the main body 1 by the engagement of the protruding piece 7c and the notch 6a.
These are removably tightened and fixed via a coupling ring 21.
Note that the truncated conical hole 7d at the base end of the outer cylinder 7 is connected to the mounting portion 6.
is crimped onto the truncated conical portion 6d.

Next, the knob tube 16 is pulled out, the boss 16b is removed from the recess 7a of the outer tube 7, the sliding tube 9 is pushed out together with the insertion tube 10, and the pin 15 and stopper screw 14 are inserted into the tips of the long holes 11 and 12. the boss 1 of the knob cylinder 16 using the spring force of the spring 17.
6b is engaged with the recess 7b, the tip of the insertion tube 10 will be in the same position as the tip of the fiber 4, as shown by the chain line in FIG. In this state, after inserting the insertion tube 10 into a joint such as the knee of the subject, pull out the knob tube 16 to remove the boss 16b from the recess 7b of the outer tube 7, and integrate the sliding tube 9 with the insertion tube 10. pin 15 and stopper screw 14 into elongated hole 1.
1 and 12, and when the boss 16b is engaged with the recess 7a, the tip of the insertion tube 10 slightly protrudes from the tip of the inner tube 8, as shown by the solid line in FIG. The distal end portion 4c of the flexible portion 4 protrudes from the distal end of the insertion tube 10 over almost the entire length. In this state, lever 5
By this operation, the tip 4b of the flexible portion of the fiber 4 is bent, and the light guide hole of the fiber 4 is connected to the power supply device via the cord 3, so that the fiber 4 is irradiated with light. Bore and body 1 for image transmission with an objective lens provided
The inside of the joint can be inspected by directly viewing the inside of the joint at the distal end of the main body 1 through the internal optical system, or by photographing and recording the inside of the joint with a camera attached to the main body 1.
In this case, by sending liquid into the joint by appropriate means and opening the pot 19, the liquid can be sucked from the liquid suction port 20 through the inner tube 8, thereby improving visibility. After inspecting the inside of the joint as described above, the insertion tube 10 is kept retracted or pushed out again, and the portion inserted into the joint is pulled out.

Thereafter, the coupling ring 21 is rotated in the opposite direction and returned to the position before rotation, and the coupling ring 21 is pulled out from the attachment part 6 together with the outer tube 7, and the outer tube 2 is removed from the main body 1 for cleaning and disinfection.

In this embodiment, when the outer tube 2 is attached to the fiberscope main body 1, the tip of the inner tube 8 is positioned at or at the same position as the tip of the fiber 4, and the insertion tube 10 is positioned at the tip of the fiber scope 1. is inner tube 8
The stroke is regulated by the elongated holes 11, 12, the knob 13, and the stopper screw 14 so that it can reciprocate with the sliding tube 9 between the tip of the fiber 4 and the tip of the fiber 4, or in a range close to between these.

In the present invention, the mechanism that allows the outer tube and the fiberscope body to be attached and detached is not necessarily limited to the structure of the embodiment, such as screwing the outer tube, and the stopper screw of the embodiment may be inserted. The elongated hole may be omitted, and the structure of the knob is not limited to the structure of the embodiment, such as tightening the sliding tube by screwing it into the outer tube, or loosening the screw to make it slidable.

[Effect of idea]

As explained above, according to the outer tube of this invention, the outer tube that is removably fixed to the fiberscope body and the inner tube that covers the proximal side of the bent portion of the fiber are arranged concentrically. Then, the proximal end of the inner tube is fixed to the outer tube, a sliding tube is fitted into the outer tube so as to be slidable in the axial direction, and an insertion tube that slidably covers the inner tube is fitted into the sliding tube. The proximal end is integrally provided, and a knob provided on the sliding tube is inserted into a long hole formed in the outer tube so as to protrude from the outer circumference of the outer tube, and the knob and the long hole allow the sliding tube and the insertion In order to restrict the stroke of the tube to a range in which the tip of the insertion tube is between or close to the tip of the inner tube and the fiber, we made a slight modification to the general fiberscope body, and added it to the above-mentioned body. By simply attaching the mantle tube, the inside of the joint can be inspected and recorded by direct observation or photography in a wide field of view without damaging the fibers, and the main body is easy to design and manufacture, and is inexpensive. , the outer tube can be removed from the main body for cleaning and disinfection, resulting in a sanitary effect.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a plan view of the fiberscope removed from the main body, Figure 2 is a longitudinal front view, Figure 3 is an enlarged sectional view of the knob, and Figure 4 is the installation. FIG. 5 is a plan view of the fiberscope body when it is attached to the main body of the fiberscope. 1... Fiberscope body, 2... Mantle tube, 3... Cord, 4... Fiber, 4a...
Hard part, 4b... End part of the flexible part, 4c... Tip part of the flexible part, 5... Lever, 6... Outer tube attachment part, 6a... Notch, 6b... Notch groove, 6c... Annular groove , 6d... truncated conical part, 7... outer cylinder, 7a,
7b... recess, 7c... projecting piece, 7d... truncated conical hole, 8... inner tube, 9... sliding tube, 10... insertion tube, 11, 12... long hole, 13... knob, 14...
...Stopper screw, 14a...Head, 15...Pin, 15a...Head, 16...Knob tube, 16a...
... recess, 16b... boss, 17... spring, 18...
...Washer, 19...Kottoku, 20...Liquid suction port, 21
... Coupling, 21a ... End flange part,
21b...Locking piece, 21c...Rotating rod.

Claims (1)

[Claims for Utility Model Registration] (1) The fiberscope body with a built-in optical system consists of a hard part on the base side and a soft part on the tip side, and only the flexible part at the tip connects the bendable fiber. This is an outer tube for a fiberscope for joints, in which an outer tube removably fixed to the main body and an inner tube that covers the base side by a bent portion of the fiber are arranged concentrically. The base end of the inner tube is fixed to the outer tube, a sliding tube is fitted into the outer tube so as to be slidable in the axial direction, and the base of the insertion tube that slidably covers the inner tube is fitted into the sliding tube. The end portion is integrally provided, and a knob for regulating the stroke of the sliding tube and the insertion tube is provided on the sliding tube within a range where the tip of the insertion tube moves between the tip of the inner tube and the tip of the fiber, or a range close to this. A mantle tube for a fiberscope for joints, characterized in that the knob is inserted into a long hole formed in the outer tube and protrudes from the outer periphery of the outer tube. (2) The outer tube of the fiberscope for joints according to claim 1, wherein the inner tube communicates with a liquid suction port with a socket provided in the outer tube. (3) The knob has a spring inserted between the head of a pin fixed to the sliding tube and the knob fitted on the pin to press the knob against the outer periphery of the outer tube.Request for Utility Model Registration. The mantle tube of the fiberscope for joints according to item 1 or 2. (4) The outer cylinder has recesses on the outer periphery of both ends of the elongated hole, into which the boss provided on the knob removably engages. Fiberscope mantle.