JPH0741441Y2 - Waterproof cap for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an endoscope waterproof cap used for cleaning an endoscope or the like.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, a system for capturing an observation image by connecting an external camera to an eyepiece of an optical endoscope (hereinafter, abbreviated as fiberscope) There is. For that purpose, it is necessary to supply power to the camera from the light source device or send a dimming signal from the camera to the light source device.Therefore, electrical contacts are provided between the camera and the eyepiece part and between the scope connector and the light source device. ing. When the camera, the light source, and the control device are not connected, even if a human body touches the electric contact, there is no electric shock, so that the electric contact is exposed to the outside.
Also, it is easier to wipe dust and the like.

However, in recent years, solid-state image sensor (hereinafter, CCD
Abbreviated. ) Built-in electronic endoscope has been widely used. This is to control the CCD at the tip of the insertion part by a separate video processor (hereinafter abbreviated as VP). Of course, the CCD drive power supply and drive pulse are supplied to the connection part between the endoscope side connector and VP. And electrical contacts for connecting electric wires for transmitting output signals from the CCD. However, as is well known, CCDs are extremely vulnerable to static electricity, and there is a great risk of damaging the CCDs when a charged human hand or the like touches the contacts. Therefore, unlike the fiberscope, these electrical contacts are structured so that they cannot be easily touched (for example, the contacts are provided in the inner and inner parts of the base).

On the other hand, the endoscope has a waterproof structure because it can be immersed in a chemical solution after use to avoid infection by a disease. For this reason, it is difficult to drain water after removing it from the chemical solution if it is soaked in the chemical solution even if the contact mounting part of the electronic endoscope is waterproofed. There is a possibility that it will flow, and virtually the contact cannot be submerged. Therefore, JP 61-248017 A,
As in Japanese Utility Model Laid-Open No. 62-111001 and Japanese Utility Model Laid-Open No. 61-48702, a waterproof cap is attached to a base having an electric contact portion to waterproof the electric contact portion. Further, even in the above-mentioned fiberscope, it is difficult to make the contacts of the external camera have a waterproof structure, so that a waterproof cap is attached to the eyepiece to make the structure waterproof.

As described above, the endoscope is waterproofed by attaching the waterproof cap, but in order to confirm the waterproofness, pressurized air is sent from a separate pressurizing device into the endoscope through the air supply tube. The endoscope is submerged while it is plugged in, and the waterproofness is checked by the presence of bubbles. For this reason, conventionally, as shown in Japanese Utility Model Laid-Open No. 62-59001, with a valve that is normally sealed in a waterproof cap and connects the air feeding tube and the inside of the endoscope by attaching the mouthpiece of the air feeding tube. Vent mouthpieces are provided. In this case, the waterproof cap is rotatably attached to the endoscope base, and the air supply tube is also rotatably attached to the vent base. However, the above
In the technology of Japanese Patent No. 62-59001, since the rotation center axis of the endoscope mounting portion and the air supply tube mounting portion are provided coaxially, if one of the mounting portions is removed, The mounting part may also rotate and come off, and if this work was performed underwater, water could enter the electrical contact part and cause a serious accident.

In order to reduce the risk, it may be possible to increase the waterproof cap attachment force more than the air supply tube attachment force, but increasing the difference in force will increase the force and limit the operability. Yes, it is not a complete measure.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a safe waterproof cap for an endoscope that does not loosen when the air supply tube is attached or detached.

[Means and Actions for Solving the Problem] The waterproof cap for an endoscope of the present invention includes a first mouthpiece part to be rotated and attached to a mouthpiece of an opening provided in an endoscope and a mouthpiece of a pressurizing device. The rotation shaft of the second mouthpiece part which can be rotated and attached is made non-coaxial.

In the present invention, the base of the pressurizing device is rotated and removed from the second base. Since the second base and the first base are non-coaxial, the first base does not rotate by rotating the second base.

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

1 to 12 relate to a first embodiment of the present invention.
The figure is a cross-sectional view of the waterproof cap for an endoscope, FIG. 2 is an explanatory view of the endoscope, FIG. 3 is an outline view of the waterproof cap for an endoscope, and FIG.
The figure is a side view in the CC ′ direction of FIG. 3, and FIG. 5 is the A of FIG.
Direction side view, FIG. 6 is a sectional view of the mouthpiece of the inspection tool, FIG. 7 is an explanatory view of an air / water switching valve, FIG. 8 is an explanatory view of a valve body, and FIG.
Figure is an illustration of the cam hole, Figure 10 is an illustration of the locking section, Figure 11 is an illustration of an endoscope with a long insertion section, and Figure 12 is a waterproof cap for an endoscope and a high-pressure air supply connector. It is explanatory drawing which shows the positional relationship.

The present embodiment applies the present invention to an electronic endoscope.

In FIG. 2, the endoscope 1 includes a flexible insertion portion 2, an operation portion 3 connected to a rear portion of the insertion portion 2, and an operation portion 3 thereof.
The universal cord 4 is extended from the side portion of the.

An objective lens system 6 is provided at the tip of the insertion section 2, and a solid-state image sensor 7 is provided at the image forming position of the objective lens system 6. The solid-state image sensor 7 has an insertion portion 2
An optical image of the observation site illuminated by the illumination light emitted from the light distribution lens system (not shown) at the tip of the is formed. The solid-state image pickup device 7 converts the optical image into an electric signal and outputs the electric signal when a drive pulse is applied. The electric signal and the driving pulse are supplied to the insertion section 2, the operation section 3 and the universal cord 4.
The plurality of signal lines 8 inserted through the inside of the universal cord 4 send the signal to the signal connector 11 of the general connector 9 provided at the rear end of the universal cord 4. The signal connector 11 is provided on the outer peripheral surface of the general connector 9 and has contact pins 12 to which a plurality of signal lines 8 are respectively connected. The signal connector 11 is connected to a video processor (not shown) to input / output an electric signal including a drive pulse and video information. In addition, the inner surface of the signal connector 11 has a ventilation portion with the inside of the scope (not shown). A light source connecting portion 13 having an incident end surface of a light guide for transmitting illumination light to the light distribution lens system is provided on the end surface of the general connector 9. This light source connection
Reference numeral 13 is connected to a light source device (not shown).

The operation section 3 is provided with an air / water supply switching valve 14, and the outer surface of the objective lens system 6 can be cleaned by operating the switching valve 14.

The air / water switching valve 14 is constructed as shown in FIG.

In the figure, a valve seat body 158 to which a valve body 157 of the air / water switching valve 14 is attached is formed in a substantially bottomed cylindrical shape. For mounting the valve seat body 158, the bottom side is arranged inside the operation part 3, and the opening end protruding to the outside of the operation part 3 is screwed and fixed to the mounting ring 163 attached to the outer wall 102a. Is used. Then, the downstream side pipeline 110a of the air feeding pipeline 110 is connected to the upper stage of the peripheral wall of the valve seat body 158, the upstream side pipeline 110b of the air feeding pipeline 110 is connected to the middle stage, and the water feeding pipeline is also connected to the lower stage. The upstream side pipeline 111a of 111 is connected, and the downstream side pipeline 111b of the water supply pipeline 111 is connected on the peripheral wall of the valve seat body 158 between the upstream side pipeline 111a and the upstream side pipeline 110b. ing.

The valve body 157 is provided with a piston tip portion 220 having a sealing ring 182 on the tip side of a hollow piston 180 having a valve seat 180b formed at the tip. And this piston tip 2
A valve portion 188 is provided at a position corresponding to the valve seat 180b of 20, and the piston tip end portion 220 is connected to the shaft portion of the piston 181 for gas transfer switching inserted in the piston 180. A hollow operation button 221 is provided on the upper end of the piston 181 protruding from the piston 180, and a two-step action slider mechanism 222 is provided on the operation button 221. Further, an opening / closing valve 223 (comprising a valve portion 224 and a valve seat 225) is provided on the shaft portion of the piston 181, and sealing rings 226, 227 and a check valve 228 (all of the valve seat body 158 are provided on the outer periphery of the piston 180 from the lower side). It is in contact with the inner surface.), And the structure in which the flow paths are switched is used.

In the slider mechanism 222, a cylindrical slider 230 is slidably provided around a shaft portion directly below the operation button 221 and on a fixing member 186a fitted in the mounting ring 186. Then, the spring receiver formed on the fixing member 186a and the slider 230
A compression spring 231 is interposed between the bottom wall of the operation button 221 and a spring receiver formed on the outer peripheral portion of the slider 230 and has a stronger elasticity than the compression spring 231. A stopper 2 in which the piston 181 is formed at the base of the fixing member 186a by interposing 232
It is designed to push down by 1 amount to the part 33.
Further, a position where the on-off valve 223 and the valve seat 225 abut,
That is, a structure is used in which the positions are sequentially pushed down from positions 1 to 12. That is, the pressing force amount of 1 is determined by the compression spring 231 and the pressing force amount of 12 is determined by the compression spring 232, and it is possible to operate for 1 minute, 12 minutes depending on the hand feeling according to the difference in the pressing amount.
Then, in the standby state represented by F on the left side of FIG. 7, the valve portion is
188 closely adheres to the valve seat 180b to block the downstream side pipeline 110a side, and the upstream side pipeline with the sealing ring 182 and the sealing ring 226.
It is set to block 110b. In addition, water supply line 11
1 is blocked by the sealing ring 182.

Further, at the time of gas feeding indicated by G on the right side of FIG. 7, when pushed in one, the valve portion 188 separates from the valve seat 180d, and the valve chamber 235a and the on-off valve 223 formed at the tip side of the piston 180 are opened. The valve chamber 236 is communicated with the valve chamber 236, and gas can be sent from the upstream side pipeline 110b to the downstream side pipeline 110a in this state. Furthermore, at the time of water supply indicated by H in FIG. 7 (shown by a chain line in the figure), when the piston 181 is further pushed in by l2, the valve portion 224 of the on-off valve 223 comes into contact with the valve seat 225. Valve room 235
It is set so that the gas supply is stopped by shutting off between a and the valve chamber 236, and the inner contact of the sealing ring 182 is released so that the upstream side pipeline 111a and the downstream side pipeline 111b communicate with each other. You can use it to send water. Then, the leak hole 200 and the hole 201 are provided in the shaft portion of the piston 181 of the valve body 157, and the leak passage is connected to the downstream side of the sealing ring 226, so that the gas sending pressure is increased by a user's mistake. Even so, it is possible to let the gas that exceeds the cutoff capability escape to the atmosphere. That is, in the standby state indicated by F, when the gas pressure in the upstream pipe line 110b is high and the sealing ring 226 exceeds the shutoff ability, the gas to be sent is the sealing rings 226, 22.
Hole 236a formed between 7 and the valve chamber 236 of the on-off valve 223, hole 2
01, leaks to the standby (outside) through the leak path 200 (due to the difference in resistance in the pipe). Of course, the gas fed from the valve portion 188 also leaks to the standby through the hole portion 201 and the leak passage 200. Further, both the sealing rings 226, 227 escape the gas to be sent even if they are broken or not completely adhered.

By adjusting the elasticity of the compression springs 231 and 232 and the frictional force between the sealing ring 182 and the sealing ring 202 described later, the pushing force of the first step of the slide mechanism 222 is set to 300 to 600.
g, 1st step pushing end force is 400 to 700g, 2nd step pushing start force is 1200 to 1500g, 2nd step pushing end force is 1
It is set to 300-1700g. This first-step pushing start force amount overcomes the frictional force of the sealing rings 182, 202 when not operating and the piston 181 is surely returned to the state of F in FIG.
And the amount of force required to reliably seal the valve seat 180b. Also, from the end of the pushing of the first step to the pushing start force of the second step, the force is differentiated so that the switching position of the first step and the second step can be detected by hand. However, if it is too large, the force of the second step becomes too heavy, so a difference of at least 500 g is provided. Furthermore, the pushing force of the second step is set to a maximum of 1700 g so that the user can use it without being overly tired.

The hole 193 provided on the peripheral wall of the piston 0 and the downstream side pipeline 110
A check valve 228 is provided between the check valve and a to allow the flow only from the upstream side to the downstream side. With such a structure, the reverse flow from the downstream pipe line 110a can be suppressed. it can. Specifically, it is effective for the backflow of filth from the body cavity and the backflow when pressurized water is supplied by a syringe by providing an auxiliary water supply port in the middle of the water supply conduit 111. The check valve 228 further extends the upper end side of the check valve 228, and a sealing projection 228a is formed on the outer peripheral portion of the extended portion to check the check valve 22.
The structure is such that the outer peripheral surface of the piston 180 and the inner peripheral surface of the valve seat body 158 provided immediately above 8 are sealed. In such a structure, the check valve 228 is an integrated structure that also serves as a seal between the piston 180 and the valve seat body 158, so that the cost is low and the size is small. Moreover, since it is integrated, it has the effect of improving the assemblability.

The check valve 228 is set so that the internal gas leaks to the outside only when the pressure inside the piston 180 becomes 0.05 to 0.15 Kg / cm ² higher than the pressure outside the piston 180. The reason for this is that if the check valve 228 is too tight (0.05 Kg / cm
⁽² or less) When gas escapes to the outside through the leak hole 200 and the hole 201 due to breakage of the seal member, etc., gas is accumulated from the check valve 228 and gas can flow to the downstream side pipeline 110a and become natural gas. In addition, if the tightness of the check valve 228 is too high (0.15 Kg / cm ² or more), the gas flow rate during regular gas feeding may be significantly reduced.

Further, the seal structure of the piston 181 is such that the sealing ring 202 provided on the shaft portion of the piston 181 is formed of a valve body in an umbrella shape,
The structure is such that this is arranged directly above the valve portion 224 of the piston 181. Incidentally, as the sealing member of the umbrella-shaped valve body is arranged immediately above the valve portion 224, the depth of the leak hole 200 is increased to increase the valve portion 224.
The hole 201 is provided immediately below the structure.

In this way, when the check valve 228 is formed into an umbrella-shaped valve body,
The sliding resistance of the piston 181 can be reduced.

Furthermore, the opening / closing valve 223 has a structure in which the valve portion 224 is received on a flat surface. Specifically, the valve part whose bottom surface is flat
224 is used, and the valve seat 225 to be combined with the valve portion 224 has a flat seat surface, and the opening and closing operations are performed by contact and separation between the flat surfaces. Such an on-off valve 223
With this, it is possible to prevent the valve portion 224 from sticking to the valve seat and improve the durability (life). Moreover, there is an advantage that the accuracy of the abutting position is improved. This point can be recognized by the amount of movement of the piston 181.
That is, when the valve portion 224 is abutted against the valve seat 225, the valve portion 224
The rubber that makes up the
The amount of movement of 181 can be smaller when the valve portion 224 is flat than when it is tapered.

The signal connector 11 has a substantially cylindrical shape, and a seal portion 16 is formed at the tip thereof. A waterproof cap mounting pin 17 is provided in a radial direction on the peripheral wall on the side of the general connector 9 behind the seal portion 16.

The signal connector 11 has water (liquid) for the purpose of cleaning and disinfecting.
A waterproof cap 18 for an endoscope is provided so as to be detachable when it is submerged. The endoscope waterproof cap 18 includes a cap body 19 as a first mouthpiece, a ring-shaped packing 28 for keeping watertightness, a packing retainer 29 for fixing the packing 28, and a cover member 21. ing. The cap body 19, packing 28, and packing retainer 29 are each formed in a substantially ring shape.
19, the packing 28, and the packing retainer 29 are provided in this order, and form a substantially tubular member as a whole. In addition, the cover member 21
Is shaped like a bowl, and includes packing retainer 29 and packing 28.
Of the cap body 19, the packing 28, and the packing retainer 29 so as to cover the respective outer peripheral walls of the cap main body 19 and the outer peripheral wall of the cap main body 19 on the packing 28 side, and one opening of the substantially tubular integrated member Is designed to be blocked.

The cap body 19 and the cover member 21 are fixed by a screw 22 screwed in the radial direction. A locking portion 23 as shown in FIG. 5 is formed on the peripheral wall of the cap body 19 on the connector side from the screw 22. The locking portion 23 includes a vertical groove portion 24 that opens to the connector 11 side and an oblique groove portion 25 that follows the vertical groove portion 24.
And a lateral groove portion 26 and a step portion 27. The waterproof cap attaching pin 17 is engaged with the locking portion 23, and the waterproof cap 18 is formed.
The pin 17 drops into the step portion 27 by rotating around the central axis 30 in the longitudinal direction as a rotation axis, and the waterproof cap 18 and the signal connector 11 are locked.

A seal lip portion 31 is annularly provided on the inner peripheral wall of the packing 28, and the cover member 21 of the seal lip portion 31 is further provided.
On the side, an elastic portion 32 is provided on the connector 11 side so as to project. When the seal lip portion 31 is locked with the signal connector 11, the outer peripheral wall of the seal portion 16 of the signal connector 11 is a seal lip portion.
31 is pressed and deformed so that the watertightness is maintained between the signal connector 11 and the waterproof cap 18.

When the waterproof cap 18 is attached to the signal connector 11, the elastic portion 32 has the mounting pin 17 from the vertical groove portion 24 to the diagonal groove portion 25.
When it is engaged with the lateral groove portion 26 via the above, it is pressed by the tip portion of the seal portion 16 of the signal connector 11 to be deformed and urged. This urging force is due to the mounting pin 17
Is designed to be dropped into the stepped portion 27, and the waterproof cap 18 is prevented from falling off from the signal connector 11. The elastic portion 32 may be provided on the entire circumference, or may be partially provided for adjusting the amount of biasing force.

Further, a plurality of rotation stopping portions 33, 33, ... Are projected on the end surface of the packing 28 on the cover member 21 side so as to engage with the plurality of recesses 34, 34 ,. It is provided to prevent the packing 28 from rotating.

A finger contact portion 35 is provided on the outer peripheral wall of the cover member 21 to facilitate rotation when the cap 18 is attached or detached.

When a waterproof cap 18 is attached to the signal connector 11 on the outer peripheral wall of the cover member 21, the endoscope 1 and the waterproof cap 18 are inspected for waterproofness.
There is provided a supply port 36 as a second mouthpiece part to which the inspection tool shown in Japanese Patent No. 22 can be connected.

The supply port 36 is fixed so that the base end portion of the communication pipe 38 is fitted into the mounting hole 37 formed in the outer peripheral wall of the cover member 21 and the fixing nut 39 is used to give up the watertightness. There is.

The longitudinal central axis 40 of the communication pipe 38 is the waterproof cap.
The central axis 30 of 18 is substantially orthogonal to the central axis 30.

The end portion of the communication pipe 38 protruding outward is formed to have a large diameter together with the inner and outer diameters with respect to the base end portion, and the valve chamber provided inside this
A valve body 42 is fitted into the shaft 41 so as to be vertically movable. A cam receiving pin 43 is screwed to the side wall of the valve body 42,
The cam receiving pin 43 is a cam hole locked to the pipe wall of the communication pipe 38.
It fits in 44 and is engaged.

As shown in FIG. 9, the cam holes 44 are provided at 90-degree angular intervals so as to be inclined with respect to the axial direction of the communication pipe 38.
Therefore, when the cam receiving pin 43 moves along the cam hole 44, the valve body 42 moves in the axial direction of the communication pipe 38 while rotating in the valve chamber 41. A ring receiving groove 46 is annularly engaged with the outer periphery of the inner end of the valve body 42, and an O ring 47 is fitted in the ring receiving groove 46. When the valve body 42 is in the fully lowered position, the O-ring 47 is pressed against the valve seat 48 of the valve chamber 41 to close the communication pipe 38 and is in a closed state. Further, as will be described later, the O-ring 47 is separated from the valve seat 41 at a position where the valve body 42 is raised, and the communication pipe 38 is opened. As shown in FIG. 8, a pair of notches 50, 50 are formed on the outer circumference of the large diameter portion of the valve body 42 located on the outer end side of the O-ring 47. Ventilation paths 50a, 50a are formed between the inner peripheral surface of the valve chamber 41 and the inner peripheral surface of the valve chamber 41.

A cylindrical rotating body 51 is fitted on the outer periphery of the outer end of the communication pipe 38. The rotating body 51 is supported by a collar 52 formed on the outer end of the communication tube 38 and a cover ring 53 fixed by screwing to the communication tube 38, and does not move in the axial direction of the communication tube 38 and is in its fixed position. It is adapted to rotate around the communication pipe 38. The cover ring 53 covers the outer periphery of the rotary body 51, leaving a part of the flange 52 side. Further, on the exposed outer peripheral surface portion of the rotating body 51, an engagement receiver 54 composed of a notch recess is formed, and on the flange 52, a notch groove 56 corresponding to the engagement receiver 54 is formed. ing. Then, as will be described later, when the valve body 42 is closed, the engagement receiver 54 faces the notch groove 56 and continues. Further, the rotating body 51 is formed with an elongated hole 57 with which the cam receiving pin 43 is engaged. The long hole 57 is formed long along the axial direction of the communication pipe 38. Thus, the valve body 42 and the rotary body 51 rotate integrally via the cam receiving pin 43, but the valve body 42 is configured to be movable only in the axial direction with respect to the rotary body 51. An airtight O-ring 58 is inserted between the communication pipe 38 and the rotating body 51.

A pin-shaped first locking body 59 protruding outward from the side is fixedly attached to the cover ring 53. The first locking body 59 has a locking portion for a high-pressure gas supply connector 61, which will be described later.
62 is adapted to engage.

On the other hand, a high pressure gas supply connector 61 as shown in FIG. 6 is detachably connected to the supply port 36. That is, reference numeral 63 in FIG. 6 denotes a connection mouthpiece, and the connection mouthpiece 63 has a large-diameter portion 64 and a small-diameter portion 66 which are fitted on the inner circumference of the supply port 36 with an intermediate diameter portion 67 interposed therebetween. The small diameter portion 66 has a hose 68 communicating with a high pressure gas supply source (not shown).
Are fitted and connected. Further, when the connector 61 is fitted into the supply port 38, the wall of the large diameter 64 receives the engagement
A second locking body 69 that is inserted and locked in the 54 is provided. The second locking body 69 is composed of a screw member penetrating the wall portion of the large-diameter portion 64, and the inwardly projecting projection 71 is locked to the engagement receiver 54. Also, the head protruding outward of the screw member
72 is engaged with a long hole 74 formed in a connecting cylinder 73 described later. A sealing O-ring 76 fitted to the cover ring 53 of the supply port 36 is attached to the inner circumference of the open end of the large diameter portion 64.

The connection cylinder 73 is fitted on the outer periphery of the connection base 63 so as to be movable in the axial direction. Then, by inserting the head 72 of the second locking body 69 into the long hole 74 formed in the connection cylinder 73, it is possible to move only in the axial direction within the length range of the long hole 74. . Furthermore, the connecting cylinder 73 is a connection base 63.
Is urged outward in the axial direction by a coil spring 78 interposed between and. Further, the normal connection cylinder 73 is positioned by the spring receiving collar 79 formed at the upper end hitting the collar 82 of the holding ring 81 screwed and fitted into the connection mouth ring 63.

Further, the engagement portion 62 is formed on the peripheral wall of the tip end portion of the connection cylinder 73. As shown in FIG. 10, the locking portion 62 is composed of a continuous vertical groove portion 84 and a horizontal groove portion 86, the vertical groove portion 84 is opened at the tip of the connecting cylinder 73, and the horizontal groove portion 86 is connected to the connecting cylinder 73.
It is formed so as to have the same rotation angle width length as the cam hole 44 along the circumferential direction. When the connecting cylinder 73 is fitted into the supply port 36, the first locking body 59 is inserted into the vertical groove portion 84, and the first locking body 59 is inserted into the lateral groove portion 86 by rotating around the central shaft 40. 59 are supposed to enter.

The operation of the endoscope waterproof cap 18 formed as described above will be described.

A waterproof cap 18 is attached to the signal connector 11 of the electronic endoscope 1 to be cleaned. In this mounting, the waterproof cap attaching pin 17 is inserted into the vertical groove portion 24 that constitutes the locking portion 23 and is positioned in the diagonal groove portion 25. If the waterproof cap 18 is rotated about the central axis 30 as it is, the mounting pin 17 reaches the lateral groove portion 26 along the oblique groove portion 25 and simultaneously presses the elastic portion 32 of the packing 28 by the tip end surface of the seal portion 16. . The elastic portion 32 is biased by this and deforms. Due to this urging force, the mounting pin 17 falls into the step portion 27, and the signal connector 11 and the waterproof cap 18 are fixed. Further, when the waterproof cap 18 is attached to the connector 11, the outer peripheral surface of the seal portion 16 deforms the seal lip portion 31 to keep the watertightness between the connector 11 and the waterproof cap 18.

Next, a high-pressure gas supply connector 61 is connected to the supply port 36 in order to perform a leakage inspection of the endoscope 1.

First, the connection mouthpiece 63 is fitted into the supply port 36 such that the first engagement body 59 is inserted into the vertical groove portion 84 of the engagement portion 62 of the connection cylinder 73. In this case, the projection 71 of the second locking body 69 passes through the notch groove 56 and is inserted and locked in the engagement receiver of the rotating body 51.
Then, holding the connection cylinder 73, the connection cylinder 73 is pushed against the restoring force of the coil spring 78, and the first locking body 59 is locked.
It is located in the lateral groove portion 86 of 62. Therefore, this is the connector
When the whole 61 is rotated around the central axis 40, the lateral groove
The first locking body 59 is located at the rear end 86a of the 86, and falls into the rear end 86a to lock. Further, when the connector 61 rotates, the rotating body 51 that engages with the second locking body 69 also rotates simultaneously. Further, since the cam receiving pin 43 on the valve body 42 side is engaged with the cam hole 44 of the rotating body 51, the valve body 42 is rotated together with the rotating body 51.

Since the cam receiving pin 43 is locked in the cam hole 44, the valve body 42 is raised in the axial direction together with the cam receiving pin 43 when the cam receiving pin 43 is rotated. The O-ring 47 of the valve body 42 separates from the valve seat 48 on the assumption that the spiral shape rises. However, in the initial stage, the deformation of the O-ring 47 is restored and the O-ring 47 does not completely separate from the valve seat 48. In addition, it will be completely separated and opened at this final stage. And the air passage 50a,
The communication pipe 38 is opened through the space 50a, the O-ring 47, and the valve seat 48 so that the connection cap 63 communicates with the inside of the waterproof cap 18.

Therefore, high pressure gas is supplied through the hose 68 and introduced into the waterproof cap 18 to pressurize the inside thereof. In this case, if there are pinholes, cracks, etc., the air leaking from the bottom is confirmed as bubbles in the water to detect the leak.

When the leak inspection is completed in this way, the endoscope is taken out from the water and the connector 61 is removed from the supply port 36. That is, first, the supply of gas to the hose 68 is stopped, and then the supply connector 61 is first rotated in the opposite direction to the process about the central axis 40. As a result, the first locking body 59 is positioned in the vertical groove portion 84, so that the connecting cylinder 73 is automatically raised by the urging force of the coil spring 78 and returns to the state shown in FIG. Therefore, the connector 61 can be easily removed from the supply port 36. Further, before the connector 61 returns to the state shown in FIG. 6, the rotating body 51 also rotates at the same time, so that the cam receiving pin 43 along the cam hole 44.
To close the O-ring 47 of the valve body 42 by pressing it against the valve seat 48, and the closing operation is completed before the first locking body 59 reaches the flute 84. Therefore, when the connector 61 can be removed, it is always closed.

As described above, in this embodiment, since the central axis 30 of the connector 11 and the central axis 40 of the supply port 36 are substantially orthogonal to each other, the cap
When the high-pressure air supply connector 61 is attached to or removed from the 18, even if the high-pressure air supply connector 61 is rotated, the cap 18 does not rotate and only the high-pressure air supply connector 61 can be attached or detached.

Therefore, the high-pressure air supply cap should be immersed in the chemical solution.
Even when the 61 is removed, it is possible to prevent the electrical contacts from being short-circuited by the chemical liquid or the like without entering the chemical liquid into the cap 18.

As shown in FIG. 11, in the case of the endoscope 92 having the insertion portion 91 longer than the insertion portion 2 of the endoscope 1, the signal line 8 having the same thickness as that of the endoscope 1 is not used. The overall resistance value becomes large, and the output signal of the solid-state image sensor 7 varies. Therefore, by thickening the signal line 93 of the endoscope 92 and using a conductor having a low resistance value per unit length, the resistance value of the entire length is combined with the signal line 8 of the endoscope 1 to output the output signal of the solid-state imaging device 7. May be unified. By doing so, the output gains of the solid-state imaging device 7 can be unified even if the lengths of the insertion portions are different.

In addition, by connecting the endoscope waterproof cap 18 and the high-pressure air supply connector 61 to the connector 11, it is possible to detect water leakage,
The hose 68 is often pulled when it is put in a washing machine or a chemical layer, but the rotation direction when the cap 18 and the high-pressure air supply connector 61 are attached is clockwise, and the supply port 36 and the high-pressure air supply when attached are set. If the direction in which the hose 68 extends from the connector 61 and the high-pressure air supply connector 61 is as shown in FIG. 12, the cap 18 and the connector 61 will not come off even if the hose 68 is pulled toward the front side.

FIG. 13 is an explanatory view according to the second embodiment of the present invention in which a waterproof cap is attached to an optical endoscope.

The optical endoscope 96 of this embodiment is similar to the endoscope 1 described in the first embodiment in that the insertion section 2 and the operation section 3 at the rear of the insertion section 2 are used.
Are lined up. An objective lens system 6 is provided at the tip of the insertion portion 2, and an incident end face of an image guide 97 is provided at an image forming position of the objective lens system 6.
The image guide 97 is inserted through the insertion portion 2 and reaches an eyepiece portion 98 provided at the rear end of the operation portion 3. An eyepiece lens 99 is provided so as to face the exit end face of the image guide 97, and the eyepiece 98 allows observation of the image of the region to be examined transmitted by the image guide 97.

The eyepiece 98 is provided with an electric contact 101 so that an exposure signal and the like can be transmitted when an external camera or the like is attached, and the electric contact 101 is extended from the side of the operation unit 3. A signal line 102 that is inserted through the universal cord 4 and reaches a light source device (not shown) is connected. This electrical contact 1
01 does not have a waterproof structure and has a ventilation part.

A male screw portion 103 is provided on the outer peripheral wall of the eyepiece portion 98, and a waterproof cap 104 for an endoscope is screwed to the male screw portion 103. An O-ring 106 as a watertight member is provided on the inner peripheral wall of the waterproof cap 104 for an endoscope, and the cap 104 is screwed into the eyepiece section 98.
The inside is kept watertight.

A supply port 36 having a central axis 40 that intersects with a central axis 30 of rotation when the cap 104 is screwed is directed toward the side diagonally rearward of the waterproof cap 104 for an endoscope. This supply port 36
The high-pressure air supply connector 61 described in the first embodiment is detachably connected to this.

Other configurations and operations are similar to those of the first embodiment.

In this embodiment, the supply port 36 is provided obliquely, and when connecting the high-pressure air supply connector 61 for checking the water leakage, it is possible to improve the operability without touching the universal cord 4 with a hand.

The effect is similar to that of the first embodiment.

FIG. 14 is an explanatory view according to the third embodiment of the present invention in which a waterproof cap is attached to an optical endoscope.

In this embodiment, unlike the second embodiment, a waterproof cap for an endoscope is used.
The central axis 30 of 104 and the central axis 40 of the supply port 36 are parallel to each other.

Other configurations, operations and effects are similar to those of the second embodiment.

[Effects of the Invention] As described above, according to the present invention, by making the central axis of rotation of the first mouthpiece part and the central axis of rotation of the second mouthpiece part non-coaxial, the air supply tube Safety can be improved without being loosened by attachment and detachment.

[Brief description of drawings]

1 to 12 relate to a first embodiment of the present invention.
The figure is a cross-sectional view of the waterproof cap for an endoscope, FIG. 2 is an explanatory view of the endoscope, FIG. 3 is an outline view of the waterproof cap for an endoscope, and FIG.
The figure is a side view in the CC ′ direction of FIG. 3, and FIG. 5 is the A of FIG.
Direction side view, FIG. 6 is a sectional view of the mouthpiece of the inspection tool, FIG. 7 is an explanatory view of an air / water switching valve, FIG. 8 is an explanatory view of a valve body, and FIG.
Figure is an illustration of the cam hole, Figure 10 is an illustration of the locking section, Figure 11 is an illustration of an endoscope with a long insertion section, and Figure 12 is a waterproof cap for an endoscope and a high-pressure air supply connector. Fig. 13 is a schematic view showing the positional relationship of Fig. 13, Fig. 13 is a schematic diagram showing a second embodiment of the present invention, Fig. 14 is a schematic diagram showing a waterproof cap attached to an optical endoscope, and Fig. 14 is a schematic diagram showing a third embodiment of the present invention. It is explanatory drawing which attached the waterproof cap to the optical endoscope. 11 …… Signal connector 18 …… Waterproof cap for endoscope 30 …… Center axis, 36 …… Supply port 40 …… Center axis

Claims (1)

[Scope of utility model registration request] 1. A waterproof cap for an endoscope, which is attached to a portion of an endoscope which requires waterproofing, and which waterproofs this portion and confirms the waterproofness by a pressure device, wherein the waterproofing is required. A first mouthpiece part that can be attached to and removed from the mouthpiece of the pressurizing device by rotating in the forward and reverse directions, and can be attached to and detached from the mouthpiece of the pressurizing device by rotating in the forward and reverse directions, and the center axis of the rotation can be the first axis. A waterproof cap for an endoscope, comprising: a second base part which is non-coaxial with a central axis of rotation of the base part of the endoscope.