JPS5911832A - Light source apparatus for 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 a light source device for an endoscope, which has an improved structure around an air pipe provided in a socket to which a connector of an endoscope is connected.

It is generally known that a light source device for an endoscope is configured to include a socket for connecting a connector of an endoscope. In addition to the insertion hole for inserting the light guide of the endoscope, this socket is also provided with an air pipe for connecting the endoscope's air passage, and by inserting the endoscope connector into the socket. The endoscope and the air supply pump installed in the light source device for the endoscope are connected via an air supply tube, and air is supplied from the tip of the endoscope during endoscopic examinations such as observing the stomach and large intestine. This allows the organs to be expanded and observed.

Conventionally, as shown in Fig. 1, an air pipe has been constructed by attaching an air pipe rubber a to the lining body at the tip to form a connection part, and also provided with a flange and a nozzle C at the tip side. An L-shaped structure is adopted, and a structure is adopted in which this air supply pipe e is attached within a socket b composed of two parts. In detail, the socket e has a first socket member that can be fully supported by screws on the wall of the exterior g as the main body, and a socket mounting plate 1 that is a socket mounting member installed inside the exterior g and is supported by screws. A socket member j that is fitted with a second socket member j is used. In the first socket member j and the second socket member j, there are through holes k that communicate with each other along the axial direction.
k, respectively, and these through holes k.

The air pipe e is installed by placing the distal end tube part of the air pipe e within k and further inserting the flange part C between the first and second socket members j. , the air pump (not shown), the air cheep t connected to the air pipe e, the air pipe e, and the air pipe rubber a to supply air to the endoscope connector (not shown). At 1°, the air pipe comb a in the socket b may break or come off due to deterioration over time.

However, when replacing the air pipe e, according to the installation technique VC for the air pipe e mentioned above, the bent end n of the air pipe e protrudes toward the back side of the socket b and obstructs the removal of the air pipe e. After the body connection structure has been established, the exterior g must be removed, the air pipe e must be disconnected, and the support and connection of the first socket member j and the second socket member j must be released. The air pipe C could not be carried out of the exterior g,
Replacing the air pipe e was extremely troublesome. Moreover, since the rear end side of the air pipe e is exposed to the light source run f side, both the air pipe eX and the air pipe tube are directly exposed to the light of the light source lamp, causing a problem of significant deterioration due to light and heat. Met.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an internal view that allows the air pipe to be easily replaced and at the same time reduces the deterioration of the light source lamp due to light and heat. An object of the present invention is to provide a mirror light source device.

That is, the socket has a through hole in which the distal end side pipe portion of the air pipe is accommodated in the first socket member, and a notch portion in which the bent portion of the air pipe is accommodated in the second socket member so as to be freely accessible. When replacing the air pipe, the support of the first socket member is divided by t''f and the first socket member is removed by 11v, and then the air pipe is attached to the air pipe. The air pipe can be replaced using a simple procedure such as pulling out the socket system of 1 from the removed part without removing the exterior (main body), and also prevents the light source from shining directly around the air pipe. It is something to do.

The present invention will be described below based on embodiments shown in the drawings. 2 to 7 show an embodiment of the present invention, and a second embodiment of the present invention is shown in FIG.
In the figure, reference numeral 1 denotes an exterior as a main body of an endoscope light source device 2, and a front panel portion 1a of this exterior device is provided with a connector receiving portion 1b formed by a recessed portion. A socket 4 is provided in this connector receiving portion 1b through an opening 3 provided in the front panel portion 1a, and an endoscope (not shown) and an endoscope light source device 2 are connected through this socket 4. There is a button so that you can The socket 4 is made of an electrically insulating material, such as a plastic material, and is made of a plastic material like the first socket member 5, which is made of a cylindrical shape having approximately the same diameter as a connector 15 of an inner mirror (not shown), which will be described later. and a second socket member 6 formed into a block-shaped button, and the socket body 4a is formed by coupling these two together by fitting.

Specifically, the second socket member 6 has a rectangular tail 6a around its rear end as shown in FIG. It is composed by forming. Further, the socket member 5 of the bowl 1 has a fixing ring member 5a formed of a material, for example, a plastic material, having properties equivalent to the coefficient of thermal expansion of the first and second socket member straws on its outer peripheral surface. The first and second socket members 5 and 6 are fitted by inserting the identification ring member 5a of the rear end fli11 of the first socket member 5 into the recess 6b. It is. In addition, 6c is a screw portion provided on the upper surface of the protruding end side of the wall portion constituting the four portions 6b, and 8 is a protrusion for tightly fitting the first socket portion side 5 and the second socket member 6. Department.

The socket main body 4a configured in this manner has a socket mounting plate 9 located downstream of the front panel portion 1a and erected within the exterior 1, and a collar portion 6a that is connected to a plurality of screws 10...
The front side of the first socket member 5, which corresponds to the front part thereof, passes through the opening 3 and is exposed to the outside. Further, the second socket member 6
The threaded portion 6c is screwed together with the fixing flange member 11 inserted through the opening 3 from the outside of the front panel portion 1a, and is fixed on the front nozzle portion la, with an equivalent difference in thermal expansion. This ensures a connection between the first socket member 5 and the second socket member 6 that will not loosen even due to thermal expansion and contraction.

Further, this socket 4 is provided with a light guide connection system 12, an air supply connection system 13, and a terminal connection system 14, respectively, and an endoscope connector 15 can be freely inserted into and removed from these connection systems 12, 13, and 14 through the socket 4. It is now possible to attach it to. Here, the structure of the connector 15 attached to the socket 4 will be explained. As shown in FIG. The light guide end 17, which is fitted with an acute angle notch at the tip, and the air supply path end 18, which is connected to an air supply path (not shown) provided in the endoscope, are lined up in the center and protruded. Furthermore, terminals 1 for transmitting various electrical signals to an endoscope or an imaging device (not shown) are provided around the light guide end 17 and the air supply path end 18.
It is constructed by protruding a large number of 9. In addition, 20
21 is a suction nozzle, 22 is a high frequency connection terminal, and 23 is a gas nozzle.

The structures of each light guide connection system 12, air supply connection system 13, and terminal connection system 14 that receive the connection portions of the various connectors 15 are as described below.

That is, the light guide connection system 12 has an axially straight structure that is connected to the first socket member 5 and has a diameter slightly larger than the outer diameter of the light guide end 17 of the connector 15, corresponding to the position of the light guide end 17 of the connector 15. An insertion hole 24a is formed in the second socket member 6, and a tapered insertion hole 2 whose diameter gradually decreases toward the rear end is connected to the insertion hole 24m of the second socket member 6.
4b is bored to constitute the insertion passage 25. and,
The tapered insertion hole 24b is set to have the same diameter as the light guide end 17 on the rear end surface of the 20th socket member 6, and the light guide end 17 is inserted into the insertion passage 25 from the front panel portion 1a. As a result, the first socket member 5 and the second socket member 6 can be inserted smoothly as shown in FIG. 5 without causing problems such as the tip of the socket member being caught due to the difference in level. Insertion path 2
5, the incident surface of the light guide end 17 can be reliably positioned and connected to the optical axis of the condenser lens unit 26 and the light source run f (not shown) provided at the rear of the insertion path 25. ing. It goes without saying that the socket mounting plate 9 is provided with a through hole 27, and the total length of the insertion passage 25 is set so that the tip of the light guide end 17 protrudes from the socket mounting plate 9 when inserted. It is something that exists.

Next, the air supply connection system 13 is constructed by fitting an L-shaped air supply pipe 28 across the first socket member 5 and the second socket part ladle 6 of the socket body 4Δ. The details are as follows.

In other words, the air tube 28 is an L-shaped tube having a first connecting portion 28a at the distal end and a second connecting portion 28b at the proximal end.

A tooth-shaped air pipe rubber 29 constituting the connection part is integrally inserted (lined) into the first connecting part 28a of the air pipe 28, and the connector 15 is inserted through this air pipe rubber 29. The end portion 18 of the air passage can be connected to the air pipe 28. Further, on the straight pipe portion on the distal end side of the air supply pipe 28 on the first connection portion 28a side, there is a connection portion 28.
A flange portion 30 is integrally provided downstream of a and has a diameter larger than the outer diameter of the air pipe 28. On the other hand, as for the structure of the socket main body 4a side, the first socket member 5 is as follows.
The through hole 3 has a diameter that allows the air pipe rubber 29 to pass smoothly through the air pipe rubber 29 corresponding to the position of the air pipe end 18 of the connector 15.
1 in the axial direction. Also, the second socket member 6
This structure includes an air supply pipe that opens to the side of the second socket member 6, for example, to the bottom of the external device, following the external shape of the bent part of the air supply pipe 28, in the front end located at the rear stage of the through hole 3. A housing channel 32 is provided with a notch having a width approximately the same as the outer diameter of the air pipe 28, and a flange portion 30 of the air supply pipe 28 is provided on the front end surface of the second socket member 6, which corresponds to one open end of the housing channel 32. A recess 33 called a counterbore is provided in which it fits. Further, at the front end of the second socket member 6, there is an opening section formed of a wide notch larger than the air supply pipe 28, which allows the accommodation channel 32 to be completely opened toward the fitting end surface of the first socket section side 5. 34, and when the socket main body 4a is connected, the accommodation path 32 and the opening part 3 are
The air supply pipe 2 is placed in the accommodation channel 32 of the notch 35 consisting of the
8 and the air pipe 28 in the recess 33.
By fitting the flantz portion 30 of the air supply pipe 28 into the through hole 3 of the first socket member 5, the air supply pipe 28 is positioned as required and the socket main body is inserted. It has a structure that can be attached to 4a. In addition, 36 is connected to the second connection part 28b, and the air supply pipe 28 is connected to an air supply air pump (not shown) installed in the main body 1.
This is an air tube for connecting to the Thus, by inserting the air passage end portion 1B of the connector 15 into the air pipe rubber 29 through the socket 4, the air passage and the air source can be connected. In addition, air pipe 28 is waiting for N.
By adopting the L-shape and the notch part 35, the fixed flange member 11 can be released from the screw fixation and the fixed flange member 1 can be inserted from the front nine-flange part 1a.
The air supply pipe 28 can be carried out to the outside of the external device through the opening 34. It should be noted that it is not necessary to carry in the work by doing the reverse operation.

Next, the terminal connection system 14 will be explained.
It is shown in the figure. That is, the reference numeral 39 in the figure is a contact point, and this contact point 39 is made of a conductive pipe material, and as shown in FIG. Four positioning fixing parts are provided. One end of the lead wire 42 is inserted into the inner cavity on the one end side of the contact 39, and the lead wire 42 is fixed by crimping, so-called caulking, at a caulking portion 39a set at one end of the contact 39. In addition, as for the mother wire forming the contact 39, a material having an inner diameter that can be inserted into the terminal 19 of the connector 15 is used for the trench, and the inner surface forms the connection surface, and the contact By using pipe material for 39, assembly and production are extremely simple. On the other hand, reference numeral 43 in the figure indicates a contact insertion hole formed in the first socket member 5 and the second socket member 6 in the axial direction thereof.
A plurality of terminals 3 are provided corresponding to the positions of the terminals 39 of the connector 15. The front end surface of the second socket member 6 above the contact insertion holes 43 is provided with fitting recesses 44 into which the pins 4 of the contacts 39 are inserted. , in the step of coupling the first socket member 5 and the second socket member 6, each contact 39 is inserted into each contact insertion hole 43,
Further, each contact 3 is inserted into the fitting recess 44, and the connecting structure between the first socket member 5 and the second socket member 6 is completed from this state.
9 are positioned and fixed by pins 40 . . . and have a structure that ensures connection by fitting with each terminal 19 . . . of the connector 15 .

Note that the inner diameter of the contacts 39... is the same as the terminal 19 of the connector 15.
Needless to say, the pins 40 of each contact 39 are set according to the outer diameter of the contact 39 shown in FIG. Considering the force applied to the socket 4, in particular, the bins 40 located on the peripheral side from the axis of the socket 4 have a central angle θ around the axis of the socket 4, as shown in FIG. It is located.

Therefore, by detachably attaching the connector 15 of the endoscope to the socket 4, the light guide end 17 is connected to the light source lamp through the insertion holes 24a1 and 9 through the insertion holes 24b. 18 can be connected to an air supply source via an air supply pipe 28, and the terminal 19 can be connected to a lead wire 42 via a contact 39 at once. Note that 38 indicates a contact valve plate made of an electrically insulating material.

On the other hand, numeral 45 in the figure indicates a light guide insertion/removal detection mechanism, and the light guide insertion/removal detection mechanism 45 will be explained as follows.

That is, 46 is a relay member, and this relay member 46 is formed of, for example, a leaf spring. And its composition is
A substantially U-shaped protruding and recessed portion 46a is formed in the middle portion, and a horizontal support portion 46b is formed in one end portion.

'Furthermore, the other end of the leaf spring is formed in a vertical position, and on the side edge of that end, a rectangular plate-like part 47 forming the operation end 37 is formed with respect to the leaf spring. It is integrally provided so as to protrude in the right angle direction and toward the outside j. Therefore, the relay member 46 is configured to include the operating end 37. The support portion 46b of the relay portion 46 is connected to the second support portion 46b.
The recessed portion 46h of the relay member 46 is screwed and fixed to the inner bottom surface of a four-part groove 75 formed on the upper outer surface of the wall constituting the recessed portion 6b of the socket member 6, and the protruding portion 46h of the relay member 46 It is provided in the second socket member 6 at the rear stage and is disposed so as to be freely protrusive and retractable into the tapered insertion hole 24b through an opening 49 that opens into the chip-9 insertion hole 24b. Furthermore, the lower end of the plate-shaped portion 47 is elastically locked to the opening edge on the rear side of the opening 49, so that the operating end 37 is disposed outside the socket 4. Therefore, the relay member 46 follows the protruding and recessed portion 46a with the connector, and the operating end 3
7 is adapted to swing around the fixing screw 48 side as a fulcrum. Note that 50 indicates a relief portion for the fixing screw 48.

A light guide insertion/removal detection element 51 located outside the socket 4 and installed inside the main body 1 is attached to this plate-shaped portion 47, and detects the insertion/removal state of whether the connector 15 is set in the socket 4 or not. can now be detected. Here, the light guide insertion/removal detection element 51 will be explained. As shown in FIG.
2, a light emitting section 53a configured with a light emitting element (not shown) inside and a light receiving section 53b configured with a light receiving element (not shown) installed spaced apart from each other and facing each other,
An optical detection element 55 called a photointerrupter constitutes a detection light section 4 between a light emitting section 53a and a light receiving element 53b.
has been adopted. The light guide insertion/removal detection element 51 is disposed above the plate-shaped portion 47 so that the plate-shaped portion 47 is inserted into the detection optical path 54, and is controlled by the movement of the plate-shaped portion 47. 3, which is designed to be operated, detects that the connector 15 is not inserted by blocking the detection optical path 54 with the plate-shaped part 47, and further detects that the connector 15 is not inserted.
By opening the detection optical path 54 by swinging the connector 1
5 insertion states can be detected respectively.

In addition, 56 is a notch 3 provided in the plate-shaped part 47 corresponding to the detection optical path 54 for opening and closing the optical path, and in conjunction with the blocking of this detection optical path 54, a command is given to the light source lamp side to dim the light. A signal is sent so that when the connector 15 is removed, the light emitted to the outside through the socket 4 can be controlled to be weak. To attach the light guide insertion/removal detection element 5, each of the light emitting parts 53a1 and the light receiving part 53b are attached to the tops of the two pillar parts 57 and 57 which are erected in advance on the upper side of the second socket member 6. The mounting base 52 is screwed and fixed with screws 58 and 58 in the orientation.

On the other hand, numeral 59 in the figure is a printed circuit board on which circuits necessary for control are mounted, and on this printed circuit board 59 are the contacts 39...
A terminal unit 60 is installed to connect the ends of the lead wires 42 . . . via a connector (not shown). This printed circuit board 59 is connected to the mounting base 52 of the light guide insertion/removal detection element 5I and the screws 58 and 58.
When assembling the socket 40, it is inserted and supported in advance between the fixed parts of the socket 40, and the socket 4, the printed circuit board 59, and further the terminal unit 60 constitute an integrated unit. Therefore, the socket 4 including the printed circuit board 59
is made into a unit, and the socket is installed later, each contact 39...
By connecting the lead wires 42 connected to the terminal unit 60 via a connector (not shown), all electrical connections related to the endoscope are made.

In the drawings, 70 indicates a shutter member driven by a rotary solenoid (not shown), and 7I indicates an aperture member that can be driven through a potentiometer (not shown).

Next, the operation of the endoscope light source device 20 configured as described above will be explained.

When performing an endoscopy, first connect the connector 1 of the endoscope.
5 is inserted into the socket 4 and connected to the socket 6 with a fixing ring 61 provided on the connector 15. As a result, the light guide end 17 is inserted into the insertion hole 24a and the tapered insertion hole 24b and positioned at the light source, and the broken air passage end 18 is connected to the air pipe 28 via the air pipe rubber 29, and further inside. The terminals 19 of the endoscope are fitted into and connected to the respective contacts 39. On the other hand, in the light guide detection mechanism 45, the protruding and recessed portion 4 of the relay member 46 is detected as the light guide end portion 17 is inserted.
6a protrudes outward, and at the same time, the plate-shaped portion 47 swings as shown by the broken line in FIG. 2 to open the detection optical path 54. After that, if the power is turned on by operating the operation switch (not shown) on the operation panel (not shown) provided on the external device, the light guide insertion/removal detection element 51 installed outside the socket 4 will be connected to the relay member. 47 and that the connector I5 is inserted,
Strong light necessary for illumination is introduced from the light source lamp to the end face of the light guide shallow portion 17 via the Toko lens unit 26. Endoscopy is thus performed by inserting the insertion section (not shown) of the endoscope into the body cavity.

Then, while this light source is on, the socket 4 is connected to the connector 1 by using a different endoscope or multiple endoscopes.
5, the fixing ring 61 is removed from the socket 4 and the connector 15 is removed from the socket 4. On the other hand, this connector I
5, the protruding and recessed portion 49a returns to its original retracted state due to elastic force, and at the same time, the light guide insertion/removal detection element 51 installed on the outside of the socket 4 is connected to the plate-like portion 47. It is often necessary to perform an operation of blocking the detection optical path 54 of the sensor. Thus, the light guide insertion/removal detection element 51 detects that the connector 15 is not inserted, and the light from the light source lamp is dimmed to a light that does not dazzle the patient or doctor and does not harm the eyes. become. Then, when the plugged connector 15 of the endoscope is inserted into the socket 4 again, strong light is introduced into the endoscope due to the effect of the insertion of the connector 15 described earlier.

Therefore, when the air tube rubber 29 breaks or comes off due to deterioration over time and the air tube 28 has to be replaced when the light source unit N2 for an endoscope is used for convenience, the air tube rubber 29 must be replaced. Loosen and remove it from the front panel section 1a. As a result, the first socket member 5 is released from supporting the external device, and by pulling out the first socket member 5 through the opening 3 from this state, the air supply pipe 28 housed in the accommodation channel 32 can be seen from the front. We will have an exchange system in place. Thus, by grasping the tip of the air pipe 28 and pulling it out of the front panel part la through the opening 3 from which the first socket member 5 was removed, the air pipe 28 can be pulled out of the external device in order to remove the external device. It will be possible to transport it to.

Thereafter, the removed air pipe 28 is removed from the air pipe 36 and a new air pipe 36 is reconnected. Then, this new air supply pipe 36 is carried into the exterior 1 through the opening 3, and the bent part is housed in the accommodation channel 32 with an open front face, and the flange part 3o is housed in the concave part 33, and then the first socket If the member 5 is fitted into the second socket part side 6 through the opening 3 while housing the distal end pipe part of the air supply pipe 28, and the first socket member 5 is fixed with the fixing 7 run member 11, The flange portion 30 is the first and second
Once the socket members 5 and 6 are locked and fixed, the replacement work is completed.

Thus, by removing the external device, the air pipe 28 can be replaced with ease by pulling out or inserting the hsjEA. Moreover, since the air pipe 28 is accommodated in the notch B35 and the second socket and the tube itself block the light emitted from the light source run f (not shown), the air pipe 28 and the air pipe The light from the light source lamp does not directly hit the air pipe 36, and the air pipe 2
8. Deterioration of the air supply tube 36 due to light and heat can be reduced.

In addition, in the above-mentioned embodiment, a notch was used which consisted of an accommodation channel that covered the outer diameter of the air pipe and an open part that opened the accommodation channel to a wide width. There is no limitation to this, and the cutout may be any cutout that can accommodate the bent portion of the air pipe in a freely accessible manner.

As explained above, the present invention provides the second
Because the structure is such that the curved part side of the L-shaped air pipe can be accommodated in the socket member in the first socket member, the support for the socket member in part 1 is released and the first socket member is inserted. ,)
Exterior (main body) where the air pipe is pulled out from the part where the first socket member was removed after removing the member.
The air pipe can be replaced easily and easily without having to be removed. Moreover, since the second socket member acts as a light shielding member and prevents the light from the light source lamp from directly shining onto the air pipe, it is possible to reduce deterioration caused by light and heat around the air pipe.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the structure around the air pipe in a conventional light source device for an endoscope, Figs. 2 to 7 show an embodiment of the present invention, and Fig. 2 shows a light source device for an internal weight. A cross section showing the structure around the socket. Figure 3 is a cross-sectional view taken along line ■ to ■ in Figure 1. Figure 4 is a perspective view showing the structure around the connector of the endoscope. Figure 5 is a state diagram showing the insertion state of the light guide. FIG. 6 is a plan sectional view showing the structure around the contacts in the socket, and FIG. 7 is a layout diagram showing the pin arrangement of the contacts. ! - Exterior (main body), 4... Socket, 5... First socket member, 6... Second socket member, 9...
...Socket mounting plate, 2B...Air pipe, 29...Air pipe comb (connection part), 30...Flange part, 31...
- Through hole, 35...notch part. Applicant's Representative Patent Attorney Takehiko Suzue Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] It has a socket configured by fitting a first socket member supported by the wall of the main body and a second socket member supported by a socket mounting member installed inside the main body, and a socket in the socket. In the light source device for an endoscope, an L-shaped air supply pipe is provided which extends in the axial direction between the first socket member and the socket member of the tray 2, and has a connection part at the tip and a flange part on the tip side. , a through hole is provided in the first socket member through which the connecting portion and the distal end tube portion of the air supply pipe can be inserted along the axial direction of the first socket member with the fitting portion as a boundary, and the through hole is provided in the second socket member. The bent part of the air pipe, which communicates with the air pipe and opens to the side of the second socket member following the bent part of the air pipe and opens toward the fitting end surface of the first socket member, can be accommodated and taken out. The distal end tube portion of the air tube is housed in the through hole of the socket, the bent portion of the air tube is housed in the notch, and the seven run portions of the air tube are connected to the connecting portion. A light source device for an endoscope, characterized in that an air supply tube is attached between the ends.