JPH0743461B2 - Light source device for endoscope - Google Patents

Description

The present invention relates to a light source device for an endoscope to which a plurality of types of connectors having different shapes can be connected.

[Prior Art] As is well known, when observing the inside of a body cavity or the inside of a lumen using an endoscope, it is often necessary to illuminate the observed region. Therefore, the endoscope has a light guide cable that extends inside the light guide and can be connected to a light source device having a light source lamp through a connector provided at an end of the light guide cable. It is like this. Then, the illumination light from the light source lamp is incident on the incident end of the light guide, transmitted to the distal end portion of the endoscope, and irradiated from the distal end portion to the observed region.

A socket having a hole capable of engaging with the connector is provided at a portion to which the connector of the light source device is connected, and one end of this hole is opened so as to face the light source lamp in terms of its function. ing. Further, since the light source lamp having a high brightness is used, therefore, if the socket hole is left open when the connector is disengaged, the illumination light of the light source lamp passes through this hole. It may leak to the outside and hinder the work.

To deal with this, for example, in Japanese Patent Laid-Open No. 57-164031, the light amount of the light source lamp is reduced when the engagement state of the connector is detected and the engagement of the connector is released, or A technique has been disclosed in which it is possible to reduce the amount of light emitted in the hole direction of the socket by interposing shutter blades.

By the way, the shape of the connector to be connected to the light source device is generally different depending on the type of the endoscope. Therefore, when using a plurality of types of endoscopes, it is necessary to prepare a plurality of light source devices capable of connecting the respective endoscope connectors, and the system tends to be expensive, and the working ring deteriorates. there is a possibility.

Therefore, the applicant of the present application discloses in Japanese Patent Application No. 1-10419 that a plurality of types of connectors can be obtained by engaging an adapter in the hole of the socket and engaging a connector of an endoscope having a different shape in the hole of the adapter. A technique that enables the endoscope to be connected to one light source device is disclosed.

[Problem to be Solved by the Invention] However, when this technique is used in the above-described prior art, when the adapter remains engaged with the socket hole, the light amount of the light source lamp may be released even if the connector is disengaged. Is not reduced, and the illumination light leaks through the hole of the adapter. Although it is possible to prevent this leakage if the adapter is also attached / detached when the connector is attached / detached, the operation must be complicated.

[Object of the Invention] The present invention has been made in view of these circumstances, and it is possible to engage a plurality of connectors having different shapes and to detect the engagement state of each connector. It is an object of the present invention to provide a light source device for an endoscope in which illumination light is prevented from leaking to the outside when the connector is disengaged.

[Means for Solving the Problems] The light source device for an endoscope according to the present invention is capable of engaging a connector of an endoscope light guide, and also engaging a connector having another shape via an adapter. In a light source device for an endoscope in which a socket that can be used is provided in a housing, release of engagement between the connector and the socket, release of engagement between the adapter and the socket, and engagement with the socket Detecting means for detecting the disengagement of the engaged adapter and the connector having the other shape, and the illumination light emitted to the socket side when the disengagement is detected by the detecting means. And a dimming unit for reducing the amount of light.

[Operation] With this configuration, when the connector of the light guide and the socket are disengaged, the light amount of the irradiation light emitted to the socket side is reduced by the light attenuating unit, and the socket is provided with the adapter. When a connector having another shape is connected and the connector is disengaged from the adapter, the light amount of the irradiation light is reduced by operating the light reducing means.

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

1 to 5 relate to the first embodiment of the present invention. FIG. 1 is a side view of a socket, FIG. 2 is a side view of an adapter, and FIG.
FIG. 4 is an explanatory diagram showing a connection state of a connector and an adapter, FIG. 4 is an explanatory diagram showing an operation state of a shutter, and FIG.

In these drawings, reference numeral 1 is a light source device, and a plurality of endoscopes 2 and 3 of different types are connected to the light source device 1. Each of the endoscopes 2 and 3 has an insertion portion 4 having a different diameter that can be inserted into a body cavity, a blood vessel or the like, and has a relatively large diameter on the proximal end side of the insertion portion. The operation unit 5 is connected in series. An eyepiece portion 5a that houses an eyepiece lens is provided further on the proximal end side of the operation portion 5, and the observed portion can be observed through the eyepiece portion 5a.

A distal end portion 4a is provided at the distal end of the insertion portion 4, and a curved portion 4b formed by a plurality of bendable node rings is provided adjacent to the proximal end side of the distal end portion 4a. By operating the bending operation knob 5b provided on the operation portion 5 to bend the bending portion 4b, the distal end portion 4a can be directed to the observed region.

In addition, the night guide cable 6 that houses the light guide
Is extended from one side of the operation unit 5. Connectors 7, 8 having different shapes are provided on the side of the night guide cable 6 farthest from the operation portion 5, and the connectors 7, 8 are engaged with the socket 9 of the light source device 1. Thus, the endoscopes 2 and 3 are connected to the light source device 1.

In this case, since the shapes of the connectors 7 and 8 are different, the hole 9a of the socket 9 is formed in conformity with the connector 7 which is relatively large, and the connector 8 which is relatively small is formed. An adapter 10 is engaged with the hole 9a of the socket 9 and is engaged with the socket 9 via the adapter 10.

FIG. 1 shows a side view of the socket 9.

As shown in this figure, the socket 9 is formed in a tubular shape,
It is fixed to the bottom surface of the casing 1a of the light source device 1 via the legs 12. A large diameter portion 13 is formed at one end of the socket 9,
A part of the large-diameter portion 9 is projected to the outside of the housing 1a through a hole formed in the front panel 1b of the housing 1a, and a mount 14a is formed on the inner periphery of the protruding portion. The holding member 14 is fixed.

On the other hand, the hole 9a provided at the axial center of the socket 9 is opposed to the light source lamp 15 arranged in the housing 1a via the condenser lens 16. This front panel 1b of this hole 9a
The side has an enlarged diameter portion 17 at a portion corresponding to the large diameter portion 9 and a sliding member 18 is disposed on the enlarged diameter portion 17 so as to be slidable in the axial direction of the socket 9. . The length of the sliding member 18 in the axial direction is shorter than the length of the expanded diameter portion 17, and the holding member 14 has a hole on the socket 9 side.
9a is provided with a small-diameter portion 14b formed to have a smaller diameter than the enlarged-diameter portion 17, and the sliding member 18 is provided between the small-diameter portion 14b and the side surface 17a of the enlarged diameter portion 17 on the light source lamp 15 side. It is slidable.

A hole 18a whose axis coincides with the hole 9a is formed in the center of the sliding member 18. The hole 18a has substantially the same shape as the tip side of the holding portion 7a of the connector 7 which is formed to be relatively large. When the connector 7 is engaged with the socket 9, the hole 18a is provided on the tip side of the holding portion 7a. The sliding member 18 is the light source lamp
It is designed to slide to the 15 side. Then, the rod portion 7b formed so as to project toward the tip side of the holding portion 7a of the connector 7
Is inserted into the hole 9a of the socket 9, the entrance end face of the tip of the rod portion 7b is positioned at the focal point of the illumination light by the condenser lens 16, and the C ring 19 provided on the rod portion 7b is provided with the hole 9a. The connector 7 is adapted to be engaged with the socket 9 by engaging with the locking recess 19a.

By the way, a rod 21 parallel to the axis of the socket 9 is slidably provided on the sliding member 18, and a leg of the socket 9 is provided.
It extends in the direction of the light source lamp 15 through a guide hole provided in 12. A spring retainer 21a is formed in the central portion of the rod 21, and the rod 21 and the sliding member 18 are constantly operated by the urging force of a spring 21b interposed between the spring retainer 21a and the leg 12. Light source lamp 15
Is urged in the direction away from.

An operating member 22 is provided at the end of the rod 21 extending toward the light source lamp 15 side, while the light source lamp of the hole 9a is provided.
A shutter 23, which is an example of a dimming unit, is rotatably provided between the end surface on the 15th side and the condenser lens 16, and the shutter 23 and the operating member 22 are connected in series.

One end of the shutter 23 has a pivotal stop 12 provided on the leg 12.
The shutter 23 and the leg 1 are
The shutter 23 is always urged to rotate in one direction by the urging force of a coil spring 24 provided between the shutter 23 and the shutter.
A locking window 23a is formed in the shutter 23, and the rotation of the shutter 23 is stopped by engaging the operating member 22 in the locking window 23a.

As shown in FIG. 4, the portion of the operating member 22 engaged with the locking window 23a is an inclined portion 22a which is gradually narrowed toward the distal end side. It is in sliding contact with one side of the stop window 23a. And this inclined portion 22a
When the sliding member 18 is moved to the side away from the light source lamp 15, the shutter 23 is inserted in the optical path L and the illumination light is emitted from the hole 9a as shown in FIG. 4 (a). Direction is prevented, while the sliding member 18 is used as a light source lamp.
When moved in the 15th direction, the shutter 23 is moved to the coil spring 24.
The shutter 23 is set to be retracted from the optical path L of the illumination light by rotating against the urging force of the shutter 23.

FIG. 2 is a side view of the adapter 10. As shown in this figure, the adapter 10 is provided with a rod portion 10a which is inserted into the hole 9a of the socket 9. A large-diameter portion 25 is formed on the base end side of the rod portion 10a, and the large-diameter portion 25 is capable of engaging with the mount 14a of the holding member 14 described above.
An engaging member 26 having is provided rotatably. Then, when the mount 26a is engaged with the mount 14a by inserting the rod portion 10a into the hole 9a, the adapter 10 is inserted into the socket 9a.
And the end of the rod portion 10a of the adapter 10 is positioned at the end of the hole 9a of the socket 9,
The incident end face of the rod lens 27 provided in a is located at the focal point of the illumination light by the condenser lens 16.

The proximal end side of the rod lens 27 is the rod portion of the large diameter portion 25.
It is exposed in the recess 25a provided on the side opposite to 10a,
The illumination light is emitted into the recess 25a.
A sliding member 28 is slidably disposed in the recess 25a, and a locking member having a diameter smaller than that of the recess 25a is formed on the end surface of the large diameter portion 25 opposite to the rod portion 10a. The member 29 is fixed. Therefore, the slidable range of the sliding member 28 is limited between the locking member 29 and the side surface 25b of the recess 25a on the rod portion 10a side.

Further, when the sliding member 28 is moved to the side surface 25b side, a locking recess is provided between the sliding member 28 and the locking member 29.
29a is formed, and this locking recess 29a is formed.
By engaging a C ring 31 provided on the connector 8 formed to be relatively small, the connector 8 is engaged with the adapter 10, and the incident end of the connector 8 has the rod lens. It is arranged to face the exit end of 27.

Further, on the side surface of the sliding member 28 on the rod portion 10a side, a plurality of rods 32, which are an example of operating means, are provided parallel to the axis of the adapter 10, and holes provided in the large diameter portion 25. It is slidably projected to the rod portion 10a side through. The rod 32 presses the side surface of the sliding member 18 of the socket 9 when the adapter 10 is engaged with the socket 9 and the connector 31 is engaged with the socket 9, so that the rod 32 slides. The moving member 18 is set to slide in the direction of the light source lamp 15.

For example, when observing the inside of a body cavity with a system having such a configuration, the insertion section 4 suitable for observing the inside of the body cavity
The connector 7 of the endoscope 2 having the above is engaged with the socket 9 of the light source device 1. That is, with the rod portion 7b of the connector 7 engaged with the hole 9 of the socket 9, the connector 7 is inserted into the housing 1a.
Move to the side. Then, the rod portion 7a is inserted into the hole 9a, and eventually the tip of the holding portion 7a of the connector 7 is brought into contact with the inner wall of the hole 18a of the sliding member 18.

When the connector 7 is further moved to the housing 1a side, the sliding member 18 resists the biasing force of the spring 21b and the light source lamp 1
The rod 21 is moved to the 5 side, and the rod 21 is also moved to the light source lamp 15 side with this movement. Then, the operating member 22 fixed to the tip of the rod 21 is moved, and as shown in FIG. 4, one side of the locking window 23 formed in the shutter 23 at the inclined portion of the operating member 22 is moved. Pressed. As a result, the shutter 23 is rotated against the biasing force of the coil spring 24, so that the shutter 23 is retracted from the optical path L of the illumination light. Further, the C ring 19 provided on the rod portion 7b of the connector 7 is engaged with the locking recess 19a of the hole 9a, so that the connector 7 is engaged with the socket 9.

In this state, when the insertion portion 4 of the endoscope 2 is inserted into the body cavity and the light source device 1 is turned on, the light source lamp 15 is turned on, and the illumination light from the light source lamp 15 is directed to the condenser lens 16. The light is condensed and incident on the incident end of the connector 7. This illumination light is transmitted to the tip portion 4a of the insertion portion 4 via the light guide in the light guide cable 6. If necessary, operate the angle operation knob 5b to
Is curved to direct the tip toward the observed region. The illumination light is applied to the observed region via the tip 4a.
Then, the image of the observed region is transmitted to the eyepiece 5a via the insertion portion 4, and the image of the observed region can be observed by the eyepiece 5a.

On the other hand, when the connector 7 is disengaged, the connector 7 is gripped and moved to the side opposite to the housing 1a. Then, the engagement between the C ring 19 and the locking recess 19a of the hole 9 is released, and the pressing force of the connector 7 on the sliding member 18 is weakened along with the movement of the connector 7, and the spring 21b. The rod 21 and the sliding member 18 are slid in the direction away from the light source lamp 15 by the biasing force of. Also rod 21
By moving the operation member 22 fixed to the tip of the shutter in the same direction, the shutter 23 is rotated by the urging force of the coil spring 24 and interposed in the optical path L, and the hole 9a of the socket 9 is inserted.
The illumination light emitted in the direction is blocked. Then, in this state, the engagement of the connector 7 with the socket 9 can be completely released, and the sliding member 18 is brought into contact with the small diameter portion 14b of the holding member 14 to keep the shutter 23 stopped. By doing so, it is possible to prevent the illumination light from leaking to the outside of the housing 1a through the hole 9a even when the light source lamp 15 is still turned on.

When the other connector 8 is engaged with the socket 9, first, the adapter 10 is engaged with the connector 9. That is, the rod portion 10a of the adapter 10 is attached to the hole 9 of the socket 9.
Engage with a and move this adapter 10 toward the light source lamp 15. Then, the mount 26a of the engaging member 26 and the holding member 1
The adapter 10 and the socket 9 are fixed by engaging the mount 14a of 4 and rotating the engaging member 26 with a hand or the like.

While rotating the engaging member 26, the adapter 10 gradually moves toward the light source lamp 15. At the time of this movement, even if the end portion of the rod 32 protruding through the large-diameter portion 25 of the adapter 10 comes into contact with the side surface of the sliding member 18, the rod 32 can slide freely, and Since the moving member 18 is biased by the spring 24, the rod 32 is relatively pressed and the sliding member 28 of the adapter 10 is moved to the locking member 29 side. When the movement of the adapter 10 is stopped, the sliding member 28 is moved to the locking member 29 side, and the end of the rod 32 is in contact with the side surface of the sliding member 28 in the socket 9. .

In this state, the connector 8 formed relatively small is engaged with the recess 25a of the adapter 10, and the connector 8 is inserted into the housing 1a.
When it is moved to the side, the sliding member 28 is moved toward the light source lamp 15 at the tip of the connector 8 and the manual member is moved.
An engaging recess 29a is formed between the base engaging member 28 and the base engaging member 29.

Further, the rod 32 is projected along with the movement of the sliding member 28, and the sliding member 18 in the socket 9 is moved to the light source lamp 15 side by the rod 32. Then, due to the movement of the sliding member 18, the shutter 23 is retracted from the optical path L by the same action as described above, and the light source lamp 15 condensed by the condenser lamp 16 is collected.
The illumination light is emitted to the incident end of the rod lens 27 provided on the rod portion 10a of the adapter 10. Eventually, the C ring 31 of the connector 8 is engaged with the locking recess 29a, and the connector 8 is engaged with the socket 8 via the adapter 10.

As a result, the illumination light is incident on the incident end of the connector 8 held in the recess 25a of the adapter 10 via the rod lens 27, and is transmitted to the tip 4a via the light guide cable 6.

On the other hand, when the connector 8 is disengaged, the connector 8 is gripped and the C ring 31 of the connector 8 is disengaged from the locking recess 29a so that the connector 8 is separated from the light source device 1. Moving. Then, since the pressing force to the sliding member 28 is weakened by the movement of the connector 8, the sliding member 28 is moved to the locking member 29 side via the sliding member 18 and the rod 32 by the urging force of the spring 21b. While being slid, the rod 21 is moved in a direction away from the light source lamp 15. As a result, the shutter 23 is interposed in the optical path L by the same operation as described above, and the irradiation of the illumination light toward the adapter 10 is stopped.

In this embodiment, the shutter 23, which is an example of a light reducing means, is provided in the optical path of the light source lamp 15 to block the illumination light so that the illumination light is prevented from leaking to the outside of the housing 1a. Although the configuration example has been described, the means for dimming should not be limited to this embodiment, and is configured to reduce the brightness of the light source lamp 15 when the connectors 7 and 8 are disengaged, for example. It is also possible.

Further, the shutter 23 can be configured by a member that completely blocks the illumination light, and can also be configured by a member that only dims the illumination light.

Further, in the present embodiment, an example in which the endoscope connected to the light source device is an optical type has been described. However, the light source device includes an electronic endoscope, a rigid endoscope, and an industrial long endoscope. It goes without saying that an endoscope having another structure such as a mirror can be connected.

6 and 7 relate to the second embodiment of the present invention, FIG. 6 is a side view of the socket, and FIG. 7 is an operation state explanatory view of the photo interrupter. The members described in the first embodiment and the members having the same operation are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the shutter 23 is interposed between the light source lamp 15 and the condenser lens 16, and one side of the shutter 23 is mounted on the output shaft of the rotary solenoid 33. It is designed to be inserted into the optical path at. In addition, the rotary solenoid 33
Is connected to a photo interrupter 35 provided in the socket 9 via a control circuit 34.

In the photo interrupter 35, a light emitting section 35a and a light receiving section 35b are opposed to each other via a slit section 35c, and the slit section 3
A shield plate 36 provided at the tip of the rod 21 is interposed in the 5c. Further, the shielding plate 36 is interposed in the slit portion 35c when the sliding member 18 of the socket 9 is moved to the side surface 17a side of the recess 17, while the sliding member 18 has the small diameter portion 14b of the holding member 14. It is set to release the intervention when moved to the side. Then, when the intervention is released, the rotary solenoid 34 is rotated by the control circuit 34,
When the shutter 23 is retracted from the optical path, and the shield plate 36 is inserted in the slit portion 35c, the shutter 23 is rotated and inserted in the optical path, and the irradiation of the illumination light to the socket 9 side is stopped. It is supposed to be done.

With this configuration, when the sliding member 18 is slid against the biasing force of the spring 21b by the rod 32 moved by the connector 7 which is relatively large or the other connector 8, the shield plate 36 is exposed. It is inserted in the slit portion 35c of the interrupter 35. Then, the shutter 23 is rotated and retracted from the optical path, so that the illumination light is emitted to the socket 9 side.

When the connectors 7 and 8 are disengaged from the socket 9, the sliding member 18 is moved in the direction away from the light source lamp 15 by the urging force of the spring 21b, so that the shield plate 36 moves from the slit portion 35c. Evacuated. As a result, the rotary solenoid 33 is operated by the control circuit 34, the shutter 23 is interposed in the optical path, and the illumination light is blocked.

[Effects of the Invention] As described above, in the light source device for an endoscope according to the present invention, a plurality of connectors having different shapes can be engaged with each other, and the connectors of the respective connectors have a simple structure. There is an effect that high-luminance illumination light can be prevented from leaking to the outside when the fitting state is detected and the engagement of these connectors is released.

[Brief description of drawings]

1 to 5 relate to the first embodiment of the present invention. FIG. 1 is a side view of a socket, FIG. 2 is a side view of an adapter, and FIG.
FIG. 4 is an explanatory diagram showing a connection state of a connector and an adapter, FIG. 4 is an explanatory diagram showing a shutter operating state, FIG. 5 is a schematic configuration diagram of a system, and FIGS. 6 and 7 are second embodiments of the present invention. As for the example, FIG. 6 is a side view of the socket, and FIG. 7 is an operation state explanatory view of the photo interrupter. 1 …… Light source device 1a …… Housing 7,8 …… Connector 9 …… Socket 10 …… Adapter 23 …… Dimming means 32 …… Operating means

Claims (1)

[Claims] 1. An endoscope in which a housing is provided with a socket capable of engaging a connector of an endoscope light guide and also capable of engaging a connector having another shape via an adapter. In the light source device, the connector is disengaged from the socket, the adapter is disengaged from the socket, and the adapter engaged with the socket is engaged with the connector having the other shape. And a dimming unit that reduces the amount of illumination light that is emitted to the socket side when the engagement is detected to be disengaged by the detection unit. A light source device for a characteristic endoscope.