JPS6220162Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an endoscope piston fixing device for fixing a piston in an operating section of an endoscope when cleaning the endoscope.

Generally, in addition to the forceps channel, an endoscope is provided with a plurality of channels A, B, and C for supplying air, water, and suction, respectively. 1st
The figure shows the connection state. That is,
The operation of each of the channels A, B, and C can be switched by switching valves 2 and 3 provided in the operating section 1 of the endoscope. Each of the switching operation valves 2 and 3 is composed of a cylinder 4 and a piston 5, and the piston 5 is provided with a vent hole 6 that penetrates to the outside. Each of the pistons 5, 5 is elastically biased to protrude. Furthermore, the air supply channel A
The cylinder 4 of the operation valve 2 is interposed in the middle of the water channel B, and the air and water channel D is integrated at the tip side.
Note that a check valve 7 is inserted at the tip of the air supply channel A. The piston 5 of the switching valve 2 normally protrudes, and in this state the water supply channel B is blocked by the cylinder 4. Moreover, the air supply channel A is in a communicating state. A hole 8 is formed on the outer periphery of the cylinder 4, and when the piston 5 is pushed in, the hole 8 is located between the water channels B to communicate with each other. Therefore, in order to clean the water channel B, it is necessary to push the piston 5 in.

On the other hand, since the piston 5 of the operating valve 3 normally protrudes, the suction channel C is blocked by the piston 5, but when the piston 5 is pushed in, the hole 9 provided in the piston 5 opens the suction channel C. It is located between them to allow communication. That is, in order to clean this suction channel C, it is necessary to push in the piston 5.

By the way, when cleaning the endoscope, the channels A, B, C, and D are cleaned at the same time, but for this purpose, as described above, the pistons 5 of the switching valves 2 and 3 are connected to their ventilation holes 6. You need to push it in while blocking it.

However, the conventional piston fixing device has a piston holder screwed into a fixed frame, and the piston holder is moved forward by placing the operating section of the endoscope on the fixed frame and rotating a knob. Therefore, since the operation part of the endoscope is simply placed on the fixed frame, it is troublesome to align the piston with respect to the piston holder, and furthermore, the piston holder is moved forward gradually by rotating the knob. It was extremely difficult to work with. Furthermore, since the operating section of an endoscope generally has a complicated shape, the attachment and fixation of the fixed frame and the operating section becomes extremely unstable, and the fixed frame easily comes off from the operating section.

There is also a method in which the piston holder is penetrated so as to move back and forth, and after the piston holder is pushed forward, it is fixed with a set screw, but this also has the same drawbacks as described above.

This invention was made with attention to the above circumstances,
The purpose is to provide an endoscope piston fixing device that can securely hold the operating section of the endoscope and has good workability.

An embodiment of the present invention is shown in Figs. 2 to 10 below.
This will be explained based on the diagram. Reference numeral 11 in FIG. 2 is the base of the main body 10 of the apparatus, and this base 11 is provided with rising walls 12 and 13 at opposite ends, respectively, and the endoscope is operated on the upper surface between the rising walls 12 and 13. 14 can be installed.
An eyepiece section 15 is provided on the proximal end surface of the operating section 14, and an insertion section 1 is provided on the distal end surface of the operating section 14.
6 are connected. Further, a light guide cable 17 is connected to one end of the operating section 14, and switching valves 18 and 19 are provided at the other end. The cable 17 and the switching operation valves 18 and 19 are arranged closer to the eyepiece 15 side, and the operation section 14 on the tip side is held at the left and right ends by a holding mechanism 20, which will be described later, and is attached to the base. 11 so that it can be held securely.

Furthermore, a plurality of elastic receivers 21 are protruded from the inner wall surface of the right rising wall 13, and are adapted to receive the right end surface of the operating section 14 of the endoscope and position the operating section 14. There is. Further, a rising plate 22 is provided on the base 11 corresponding to the position of each switching operation valve 18, 19, and this rising plate 22 has both switching operation valves 18, 19.
A positioning notch 25 into which the main bodies 23 and 24 of No. 9 are fitted is provided. In other words, the main bodies 23 and 24 of the switching valves 18 and 19 have their cutout portions 2
5 and is positioned. This positions the operating section 14 in the front-rear direction. Further, positioning in the left-right direction is performed by the elastic receivers 21. Therefore, base 1
The positioning of the operating portion 14 on the device 1 is determined by the elastic receivers 21 and the cutout portions 25.

On the other hand, the holding mechanism 20 has elastic receivers 21...
A rod-shaped presser body 26 that elastically projects is provided on the right rising wall 12 facing the presser body 2.
6 is inserted into a cylindrical bearing 27 which will be described later. A coil spring 28 is built in the bearing 27, and the coil spring 28 causes the presser body 26 to protrude elastically. Also, inside the bearing 27 is a coil spring 28.
A screw 29 passing through is provided, and the presser body 26 is connected to the bearing 27 by this screw 29. In other words, the screw 29 has its tip threaded portion 3.
0 is screwed onto the presser body 26, and the rear end side is passed through the rear end wall 31 of the bearing 27, so that it can freely move forward and backward. When the presser body 26 is projected by the coil spring 28, the head 33 of the screw 29 comes into contact with the rear surface of the rear end wall 31 of the bearing 27, thereby regulating the amount of projection. Note that an elastic body 34 is attached and fixed to the tip of the presser body 26, and the elastic body 34 is attached and fixed to the tip of the presser body 26, and is
They come into contact via the elastic body 34.

Further, a guide pin 35 is provided on the outer periphery of the front end side of the bearing 27, as shown in FIG. The guide pin 35 is adapted to guide and move along a long notched groove 36 provided in the protruding portion 12a of the rising wall 12. That is, the fifth
When the guide pin 35 is inserted into the notched long groove 36 to the innermost end as shown in FIG. 6, the presser body 26 can be moved back. Further, as shown in FIGS. 7 and 8, when the guide pin 35 is made to protrude beyond the long notched groove 36, the presser body 26 protrudes. At this time, if the operating section 14 of the endoscope is present as shown by the dotted line in FIG.
hits the side wall of the operating portion 14 and cannot fully protrude.

In other words, as shown in Fig. 2, the actuator is in a state where it has retreated by the original length l, and the restoring force of the coil spring 28 acts by that length l, pushing the operating part 14 toward the elastic receiver 21... side. . Thus, the operating section 14 of the endoscope can be held on the base 11.

Further, the bearing 27 has an operating rod 37 attached to its rearward projecting end, so that the bearing 27 can be rotated. Further, as shown in FIG. 4, a pair of protrusions 38 and 39 are provided on the outer surface of the rising wall 12 to restrict the rotation range of the operating rod 37. When the guide pin 35 hits the protrusion 38 of the guide pin 35, the guide pin 35 faces the long notched groove 36. That is, it can enter into the long notched groove 36. Also, the other protrusion 39 rotates counterclockwise.
When it hits, it comes off from the notched long groove 36 and can be locked to the wall surface of the rising wall 12 (in this embodiment, especially the tip end surface of the protruding portion 12a). At this time, if the presser body 26 is in contact with the operating section 14 of the endoscope, its bearing 27 will also be pushed backward by the coil spring 28, but it can be locked in that state.

On the other hand, piston pressers 42 and 43 are provided at the front end of the rising wall 12 to face pistons 40 and 41 of the switching valves 18 and 19, respectively. Since the piston holders 42 and 43 are both attached with the same configuration, only one of them, the piston holder 42 side, will be explained. The piston holder 42 is supported so as to be able to move forward within the case 44, and the holder 42 is provided at the tip of the piston 40 side.
An elastic body 46 is attached via 5. Further, a collar 47 is formed at the opposite outer end. Further, a nut 48 is attached to the front end of the case 44.
is screwed in, and the piston holder 42 passes through the nut 48. Further, a check mechanism 49 is constructed within the case 44, and allows only the forward movement of the piston holder 42 and prevents it from moving backward.

That is, a tapered ring 50 is provided inside the case 44.
is attached and fixed, and the inner edge of the tip portion is configured as a tapered surface 51. A plurality of check balls 52 are interposed between the tapered surface 51 and the piston holder 42. Further, the check ball 52 is pushed in by a coil spring 54 via an annular washer 53. That is, the coil spring 54 is connected to the nut 48.
and washer 53, and urges check ball 52 to be pushed into tapered surface 51 via washer 53. Therefore, the piston holder 42 is movable in the direction of the arrow in FIG. to prevent movement in that direction. In other words, the check effect is activated.

Furthermore, a release ring 56 of a release operation mechanism 55 is movably fitted onto the outer peripheral surface of the piston holder 42. That is, when the release ring 56 is moved toward the non-return ball 52, the distal end of the release ring 56 pushes out the non-return ball 52, and the engagement between the tapered surface 51 and the piston retainer 42 can be released. Furthermore, the rear end of the release ring 56 projects outward and is connected to the tip of a release lever 57. The release lever 57 has its lower end pivotally connected to the device main body 10, and its upper end protrudes upward, thereby forming an operating section 58 at the upper end. By pushing the release lever 57 in the direction of the arrow in FIG. 2, the engagement state of the check mechanism 49 can be released. In addition, 5 in Figure 2
9 is a guide rod that guides the release lever 57.

The device main body 10 is designed to be detachably attached to an endoscope cleaning device (not shown). 60 in Fig. 4 is a set screw for this purpose.

Next, how to use the piston fixing device will be explained.

First, the endoscope cleaning device is attached and fixed to the device main body 10. Then, the presser body 26 of the holding mechanism 20 is retreated to the state shown in FIGS. 5 and 6. Further, the check mechanism 49 of the piston holders 42, 43 is released, and the piston holders 42, 43 are sufficiently retreated. As described above, from above the base 11 of the device main body 10, the presser body 26 and the piston presser 42,
43, the operating section 14 of the endoscope is installed as shown by the dotted line in FIG.
That is, the main body 23 of the switching operation valve 18, 19,
24 into the notch 25 of the stand-up plate 22 for positioning in the front-rear direction.
The other side wall surface of is placed against the elastic receivers 21 for positioning. Note that the eyepiece 15 and the cable 1
7 protrudes from each open portion.

Then, holding the operating rod 37 of the holding mechanism 20, push the bearing 27 until it is in the state shown in FIGS. 7 and 8. Then, the operating rod 37 is rotated counterclockwise to disengage the guide pin 35 from the long notched groove 36 and to engage it with the inner wall surface of the rising wall 13. Thus, the bearing 27 is held in a protruding state. Furthermore, at this time, the tip of the presser body 26 hits the side wall of the operating portion 14, and cannot fully protrude, compressing the coil spring 28 and elastically retreating. That is, as shown by the solid line in FIG. 2, the presser body 26, which originally protrudes, moves back by a length l, and elastically presses the operating portion 14 toward the elastic receivers 21 by that length l. This allows the operating section 14 of the endoscope to be held on the base 11.

As described above, the operating section 14 of the endoscope is reliably held in a positioned state by the holding mechanism 20.

On the other hand, after being held in this manner, by pressing the collar 47 of each piston holder 42, 43 located opposite each switching operation valve 18, 19, each piston holder 42, 43 is moved in the direction indicated by the arrow in FIG. Push in the direction shown. At this time, as mentioned above, the check mechanism 49 works, so the piston pressers 42, 4
3 will never return. When the piston holders 42 and 43 are pushed forward in this way, the elastic body 46 at the tip
are pressed against the protruding end surfaces of the pistons 40 and 41, respectively, and are pushed in as they are. Then, as shown by solid lines in FIG. 2, when the piston holders 42 and 43 move forward, the pistons 40 and 41 are completely pushed in. At the same time, the pistons 40, 41
The air vents are also blocked. That is, each piston 4
0,41 is pushed in while the ventilation hole is blocked. Note that since the tip of the elastic body 46 is formed in a spherical shape, it can fit into the ventilation hole and reliably close it. Since this state is maintained by the action of the check mechanism 49, when cleaning the endoscope, the various channels can be cleaned at the same time.

On the other hand, when removing the operating section 14 of the endoscope after cleaning, first operate and push down the release lever 57 of the release operating mechanism 55 that releases the check mechanism 49.
The release ring 56 is advanced. Then, the check ball 52 can be disengaged, and the check mechanism 49 can be disengaged. Therefore, the piston presser 4
2 and 43 can be easily retracted and returned.
After the piston pressers 42 and 43 are released in this manner, the holding mechanism 20 is then released. That is,
Rotate the operating rod 37 clockwise to remove the guide pin 35.
is positioned corresponding to the notch long groove 36. As a result, the guide pin 35 is disengaged and can enter the notched long groove 36 thereof. Then, by pulling the operating rod 37 toward the user, the guide pin 35 is inserted into the notched long groove 36, and the bearing 27 is moved backward.
Therefore, the presser body 26 also retreats and leaves the operating section 14. Thus, the operating section 14 of the endoscope can be removed from the base 11 of the device main body 10.

As explained above, according to the present invention, the operating section of the endoscope can be reliably positioned and fixed on the base of the apparatus main body by the holding mechanism. In addition, a piston holder is provided corresponding to the switching operation valve provided in the operation section of the endoscope, and the piston holder is made to protrude toward the piston side of the switching operation valve via a check mechanism, so that the piston holder is simply The piston can be pushed in simply by pushing the presser foot down.
Further, the check mechanism can be easily released by a release operation mechanism to return the piston holder.
That is, the piston holder can be handled quickly and easily.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the connection state of the channel of the endoscope, Fig. 2 is a plan view showing an embodiment of the present invention, Fig. 3 is a side sectional view showing the notch, and Fig. 4 is Similarly, FIG. 5 is a front view of the embodiment, FIG. 5 is a side view of the presser body in the retracted state, FIG. 6 is a plan view thereof, and FIG. FIG. 8 is a side view of the state, FIG. 9 is a side view of the presser body in the locked state, and FIG. 10 is a plan view thereof. 10...Device main body, 11...Base, 14...
Operation unit, 18, 19...Switching operation valve, 20...
Holding mechanism, 21... elastic receiver, 25... notch, 26... presser body, 40, 41... piston,
42, 43... Piston holder, 44... Case,
45...Presser, 46...Elastic body, 49...Return mechanism, 50...Tapered ring, 51...Tapered surface, 52
...Check ball, 54...Coil spring, 55...
...Release operation mechanism, 56...Release ring, 57...Release lever.

Claims (1)

[Scope of utility model registration request] a device main body on which the operating section of the endoscope is installed on the base; a holding mechanism provided on the device main body that fixes the operating section on the base; and a holding mechanism provided on the device main body that fixes the operating section of the endoscope. a piston holder that faces the piston of the switching valve and protrudes toward the piston; a check mechanism provided on the device body that allows the piston holder only to move forward and does not allow it to move backward;
A piston fixing device for an endoscope, comprising a release operation mechanism provided on the device main body to release the check mechanism and return the piston holder.