JPS59214424A - Operation button device in endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation button device for an endoscope that has an improved attachment/detachment structure for a portion that supports an operation member such as a lead body.

Generally, an endoscope is equipped with a valley channel used for supplying air, water, waste, or suction. The operation section of the endoscope is equipped with an operation button device for operating the valve for opening and closing the above-mentioned valve.There are devices of this kind and 41L, for example, It has been proposed that a lead body made of an elastic member made of aluminum is fitted onto a flange on the side of the endoscope operating section (Japanese Patent Application No. 57-160).
No. 368 & I). This not only has a simpler structure than the previous method of screwing in lead attachments, but also has a lower operability.

Moreover, it is clean and hygienic.

However, as in II, the connection between the Kaminichi lead body and the 7 langes is a horizontal one in which the flange is tightly attached to the mating joint formed on the lead body, so it is not possible to simply push the lead body in. It was necessary to pick it up correctly, and then shape it by pinching it with a lead material 1) and pushing and turning it.

In addition, this situation can be seen in, for example, the Japanese Patent Application No. 57-1603.
As shown in the No. 66 application, the ring for holding the piston was made of an elastic material, and the ring was made detachable from the flange.

The present invention was made based on the above-mentioned problem 1, and its object is to provide an operation button device for an endoscope that allows an elastic member for holding an operation member to be attached easily and accurately with one touch. It is in.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 shows the entire endoscope 1. FIG.

A container tube M (not shown) for supplying air, water, gas, or suction is incorporated inside the guide cord 4. These pipes are opened/closed by an air/water supply switching valve 5, a suction switching valve 6, and a gas supply switching valve 7 provided in the operating section 2 to perform the required operations. .

For example, the gas supply switch Jf7 is constructed as shown in FIGS. 2 and 3. In other words, the operation section 2
A mounting hole 3Z is formed in the wall body 9, and a cylindrical valve seat mounting member 32 is tightly fitted into this mounting hole 31. The valve seat is mounted by forming a collar 33 on the inner outer periphery of the member 32, which corresponds to the inner surface of the wall 9; It's sticking out. Attach the tita screw 34 to the outer periphery of this protruding part.
A ring 3 is formed on the external thread 34, and a ring 3 is used to attach an elastic member, which will be described later, to the locking body.
5 is screwed in. And this installation is Hori 3
The IS material 32 and the installation are fixed. has been done. For mounting the valve seat, there is a ring 36 between the mounting hole 3 and the member 32. Jisoko tube v co's ㅅf rinf
'ili wood,? 7ti is arranged. This valve seat member 37 has its bottom wall portion 38 airtightly fixed to the inner end 1111j of the valve seat member 32, and the portions other than the bottom wall @ 3B are not fitted with the valve seat. It is formed to have an outer diameter smaller than the inner diameter of the part 32, and a passage 39 is formed between its circumferential surfaces. Further, a valve seat 41 made of an annular member is screwed into the open end of the seat member 37. In other words, this valve seat 41 is connected to the valve seat member 3.
It protrudes inward from the inner wall of 7, and the protruding portion is the bottom wall portion 3801! One side of l is the valve body 4 which will be described later.
2 is applied as the valve seat surface 43, and the inside of this cylindrical valve seat part shrine 3z is used as the valve chamber 44.

Further, a valve body 42 is disposed within the valve chamber 44 . That is, the valve body 42 is connected to the valve seat member 3 forming the valve chamber 44 thereof.
7 and has a valve stem 45 disposed concentrically within the valve stem 4.
A valve part 46 made of an elastic material is fixedly attached to the inner end of the valve part 5. During standby, the elastic valve portion 46 hits the valve seat surface 43 to cut off the valve chamber 44 and the passage 39, as shown in FIG. Therefore, a disc-shaped 7 is provided at the outwardly projecting end of the valve shaft 45.
A splash plate 49 with a flange 4'7 is screwed on. A protrusion 50 is integrally formed at the center of the outer surface of the splash receiver 49. A coil spring 48 is inserted between the seven flange 47 and the valve seat member 37 as a valve body biasing means, which is disposed in the passage 39 and is wound around the valve seat member 37. ing.

The coil spring 48 biases the valve body 42, and the valve portion 46 comes into contact with the valve seat surface 43 and stands by.

In addition, since the flange 47 moves up and down using the inner circumferential surface of the member 32 as a guide, the valve body 42 can move without wobbling.

A communication hole 51 is formed in the upward flange 47 to communicate the inside and outside. Further, a communication cutout hole 52 for communicating the passage 39 and the valve chamber 4411111 is formed at the upper end of the valve seat 41, which the flange 47 comes into contact with when the valve body 42 is pushed in.

A first tube 54 forming the upstream side of the gas feeding passage and a second tube 55 forming the downstream side of the gas feeding passage are connected to the bottom wall portion 38 of the valve seat member 37.

The first tube 54 is connected to the paper portion of the valve chamber 44 so as to communicate therewith, and the second tube 55
is connected to the communication port W539.

Further, the upstream side of the gas supply passage is led through the universal cord 4 to a connector salt, and is connected to a gas cylinder (not shown) storing nonflammable gas.

On the other hand, in the gas supply switching valve 7', an operating button 57 for operating the valve body 42 as the elastic member is detachably attached to the valve seat mounting member 32. The operation button 57 has a biasing member 59 formed integrally with the periphery of the finger rest main body 58 and made of a cylindrical wall body for urging the finger rest main body 58 outward. The teeth 1 are molded as a whole using elastic material such as rubber. Further, an engaging protrusion 6I is formed on the inner circumferential surface of the open opening of the biasing member 59 to fit and engage the jig attachment member 32. In other words, the engaging ξ portion 61 is attached to the valve seat by the member 32.
It is elastically and tightly fitted into a fitting front 63 formed on the outer circumferential side surface of the fitting in the circumferential direction. Furthermore, an annular 7-flange 64 projecting from the radial outer flange J is integrally formed on the protruding outer end periphery of the valve seat member 32.

This second hinge 64 forms an outer rising wall of the fitting annular groove 63. Further, a tapered portion 67 with a larger diameter on the opening side is formed on the front edge of the engagement protrusion 61 of the operation button 57, and when the urging member 59 is fitted into the valve seat member 32, it is secured. The protrusion 6I can easily climb over the raised flange 64. The diameter of the tapered inner surface 67 is larger than the outer diameter of the seven flange 64.

In addition, when installing the valve seat in this way, the layered annular groove 6 is attached to the member 320.
3, the latch/mating protrusion 61 of the biasing member 59 is tightly fitted, and an airtight seal is achieved. However, if the internal pressure is lower than the relatively high pressure, it is possible to cause a leak.

A valve 9.4 is provided on the inner surface of the finger rest body 58 of the hood button 57.
A stand portion 68 facing the 2-7 flange 47 is configured so that a certain distance exists between the stand portion 68 and the flange 47 during standby. Further, the diameter of the base portion 68 is larger than the diameter of the protrusion 50 of the spring receiver 49.

On the other hand, in the inner circumferential surface of the operation button 57, an inner surface portion 69 located in front of the flange 64 is formed as a notched groove 70 in the circumferential direction so as to escape from the flange 64. That is, this circular portion 69 is formed to escape from the flange 764. Therefore 5
The inner diameter of the inner surface portion 69 is formed larger than the diameter of the flange 64.

Next, the operation of the gas supply switching valve 70 with the above configuration will be explained. First, when waiting, as shown in Figure 32, the
The valve body 42 is pushed upward by the +'J force of the coil spring 48, and the -7P portion 46 hits the valve seat surface 43 of the valve seat 41, closing the valve body; 39 is delayed, and the waste is not fed through the waste feed passage.

Next, if you want to feed non-flammable waste into the body cavity, connect a waste cylinder to the waste feed passage and press the operation button of the waste feed switching valve 9, which has been in the waiting state as described above. 57, and press the biasing member 59 as shown in the third column.
When the force of pushing is increased, the base part 68 touches the flange 47 of the valve element 42, and by further pushing the valve element 42, the valve element 42 is pushed down against the biasing force of the coil spring 48. In addition, the valve seat 4 that was previously connected
1 and the valve portion 46 are separated, allowing the passage 39 and the F chamber 44 to communicate with each other. As a result, the gas supply passage is opened and nonflammable gas is supplied to the nozzle side.

Furthermore, when the operation button 57 is released from being pressed, the operation button 57 returns to its original position due to the urging force of the urging member 59, and the valve body 42 also separates (FIG. 2).

By the way, in the case where an excessive amount of air is accidentally supplied into the body cavity during the above-mentioned air supply operation and the pressure inside the body cavity becomes abnormal or lower than necessary, the following actions are performed. That is, the pressure within the body cavity approaches the passage 1!339 of the gas supply switching valve 7 through the second tube 55, and is further applied to the valve portion 46 of the valve body 42. When a high pressure above a certain level is applied due to the above situation, the valve body 42 is pushed open against the biasing force of the coil spring 48 and the elasticity of the valve portion 46, and excess air, etc. is released from there.

Therefore, the pressure inside the body cavity does not exceed a certain level and danger can be prevented. This relief pressure is determined by the pressure receiving area of the valve part 46 and the pressure of the assembly of the valve body 42.
You can calculate the strength of ``a1'' and set it to an appropriate value. In addition, when the direct pressure is higher than the above pressure, for example, when the gas cylinder is connected to the above-mentioned gas passage and there is no leakage through this passage, the ring 35 and the +j force member 59 should be installed.
It expands the space between the two and leaks directly to the tattoo part.

By the way, when the operation button 57 having the above structure is to be mounted on the ring 35, its opening portion is placed over the ring 35 and pushed in linearly. As a result, the tapered portion 67 comes into contact with the seventh flange 64, and the engaging protrusion 61 smoothly rides over the flange 64 and fits into the fitting annular groove 63. At this time, especially when the fitting is completed, the inner surface portion 69 facing the flange 64 escapes from the seven flange 64 as described above, so that the inner surface other than the engaging protrusion 6I does not get caught in the middle, and Due to the action of the cutout groove 70, the engaging protrusion 61 easily expands and easily gets over the crack/white 4. Therefore, as shown in FIG. 2, the foil can be formed correctly to the predetermined mounting position with one touch. In addition, since the operation button 570 base part 68 is formed wider than the protrusion 50 on the side of the valve body 42 that is pressed by this, When the operation button 57 is pushed in, the valve body 42 is pushed straight in without fanning, and when it is returned, the valve part 46 abuts parallel to the valve seat surface 43. Therefore, the closing action is performed smoothly and reliably. Close χ Confidence can be improved.

Mapco, between the valve seat 41 and the valve shaft 45 (all around (fC)
There is a clearance 71, which is connected to the fluid bg fl + f,
It is now possible to Therefore, −99 bodies 42 yb
; Eccentric within that range. However, this clearance 7I
Since the overlap φ;j (radial direction interference length on one side) between the valve seat surface 43 and the valve part 46 is made larger, for example, twice or more, than the width (piece III) of the valve seat surface 43 and the valve part 46, leakage will not occur due to the eccentricity mentioned above. There is no. This is because if the minimum polymerization width is at least twice as high as the clearance, it can be closed.

In addition, since the peripheral wall of 1l11, which serves as the biasing part 59 of the operation button 57, is formed relatively thick, it is easy to bend.
For this reason, when the operation button 57 is pushed in from above in an attempt to attach it, the above-mentioned retaining tab 6ttlC is reliably transmitted, and the button 57 can be actually attached. If the inner diameter of the flange 64 is larger (or the same force) or slightly smaller than the outer diameter of the flange 64, the operation button 57 may come into strong contact with the outer end of the flange 64 when it is pushed in. If the force is no longer transmitted to the engagement protrusion 61, then (・
This avoids the inconvenience of being unable to completely overcome the 7 lunge 64.

In addition, as shown in FIGS. 2 and 3, the axial width of the engaging protrusion 61 is shorter than the width of the fitting annular groove 63, so that the engaging protrusion 61 is connected to the 7 flange 63. The VC end does not hit the operating section 21llIll before it completely overcomes the .

Note that, as shown in FIG. 4, a reinforcing member 81 may be provided on the peripheral wall portion of the operating portion 570 by insert molding. In this way, increase the pushing force! Da's '4('
It can be transmitted to the v'g joint section 61.

The same (g,,s)
4 elasticity fm 4A insertion 1tlli tapered part 8 outside the outer end
2 is formed.
Therefore, the performance of the device) is improved.

Furthermore, the text portion 50 of the -Aw receiver 49 may be formed as shown in FIGS. 5 and 6.

Furthermore, in the present invention, the elastic member is not limited to the operation button itself, but may be separate from the operation button and hold an operation member such as the operation button piston 1. In other words, it may be used for the purpose of mounting, and the other valve mechanisms may be separate parts and relatively shallow.

Further, the present invention is not limited to the case of the gas supply switching valve 7, but can also be applied to operation button devices such as the air/water supply switching valve 5 and the suction switching valve 6, for example.

As explained above, in the present invention, when the elastic member is fitted to the locking body, the inner diameter of the inner surface of the elastic member corresponding to the flange is made larger than the outer diameter of the flange. The elastic member can be attached to the locking body easily and reliably with one touch to the attachment position of the Hr foot.In other words, the attachment force of the elastic member is good.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an endoscope showing one embodiment of the present invention;
The figure is also a side sectional view of the switching valve for waste feed during standby.
FIG. 3 is a side view of the switching valve during the push-in operation, FIGS. It is a sectional view of a splash holder showing a modification. 35... Mounting ring, 57... Operation button, 6I... Retaining protrusion, 63... Current condition for fitting, 64... Flange,
69...Inner surface portion, 70...Notch groove. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (4)

[Claims] (1) A locking body is provided on the endoscope body side for installation with 7 lunges, and this locking body (1 locking body protects the operation part)
In an operation button device for an endoscope, in which an elastic member is removably fitted, when the elastic member is fitted to the above-mentioned flange, the inner diameter of the inner surface of the elastic member corresponding to the flange is , is larger than the outer diameter of the flange.
An operation button device in an endoscope. (2) Opening 91 at the opening for fitting the elastic member
On the mo1 edge, fj? The operation button assembly in the endoscope according to claim 1, characterized in that a tapered inner surface is formed with a larger diameter on the 40 side and a maximum diameter larger than the outer diameter of the upper Fi[: flange. Mu(io (3) The operation button device for an endoscope according to claim 1, characterized in that a tabular groove is formed on the outer edge of the flange on the side where the elastic member is inserted. (4) The operation button device for an endoscope according to claim 1, characterized in that a reinforcing member is provided on a side wall of the elastic member.