JP4436736B2 - Endoscope light source device - Google Patents

Description

  The present invention relates to an endoscope light source device capable of selectively connecting one of a plurality of types of endoscopes.

  Conventionally, endoscopes have been widely used in the medical field and the like. The endoscope is configured with an elongated insertion portion. An endoscope can observe various organs in a body cavity by inserting the insertion portion into a body cavity, and can perform various treatments using a treatment instrument inserted into a treatment instrument insertion channel as necessary. it can.

In an endoscope apparatus having such an endoscope, the illumination light from the light source device is guided using a light guide or the like, the subject also illuminates the target portion, and the return light is captured to obtain an endoscopic image. Have gained.
The endoscopic apparatus captures an endoscopic image by an imaging means, and performs signal processing by a signal processing apparatus (hereinafter referred to as a processor) so that the endoscopic image can be displayed on an observation monitor to observe a living tissue. It has become.

When performing normal biological tissue observation, an endoscopic device emits white light (hereinafter referred to as normal light) in the visible light region with a light source device, and the subject is obtained as a surface sequential light through a rotating filter such as RGB. A color image is obtained by illuminating the target portion of the image and processing the image signal based on the return light simultaneously with a processor (hereinafter referred to as a frame sequential method).
Alternatively, the endoscope apparatus arranges a color chip in front of the imaging surface of the solid-state imaging device built in the endoscope, separates the return light of normal light into RGB with the color chip, and images it with a processor. A color image is obtained by processing (hereinafter, a simultaneous method).

On the other hand, in the living tissue, since the light absorption characteristics and the scattering characteristics differ depending on the wavelength of the irradiated light, various special light observation endoscope apparatuses have been proposed.
For example, in the field sequential method, as shown in Japanese Patent Application Laid-Open No. 2002-336196, autofluorescence generated from a living tissue by irradiating the living tissue with ultraviolet light or blue light as excitation light is a normal part. An endoscope apparatus for fluorescence observation that makes a diagnosis by utilizing the difference between a lesion and a lesion has been proposed.

  In addition, as disclosed in Japanese Patent Laid-Open No. 2000-41942, an infrared light observation endoscope apparatus that irradiates a living tissue with infrared light as illumination light and can observe a deep portion of the living tissue is proposed. Has been. Further, as shown in Japanese Patent Laid-Open No. 2002-95635, a narrow band light observation endoscope capable of irradiating a living tissue with blue narrow band light as illumination light and observing the surface of the mucous membrane of the living tissue. A mirror device has been proposed.

Endoscopes used for these observations can perform at least two types of observations, ie, normal light observation and at least one special light observation. For example, in an endoscope for fluorescence observation, normal light observation and fluorescence observation are possible. In addition, in the endoscope apparatus for infrared light observation, normal light observation and infrared light observation are possible. Furthermore, in the endoscope apparatus for narrow band light observation, normal light observation and narrow band light observation are possible.
On the other hand, in the simultaneous method as well, normal light observation and at least one special light observation can be performed recently. For example, in a narrowband light observation endoscope, normal light observation, narrowband light observation, and fluorescence observation internal With a endoscope, normal light observation and fluorescence observation are possible.

In these special light observation endoscope apparatuses, switching operation between normal light observation and special light observation is performed by using an operation unit or processor of the endoscope, a switch provided on the front panel of the brilliant apparatus, or a foot switch of the endoscope. It is performed by the operation etc.
In recent years, there has been an increasing demand for enabling a plurality of special light observation modes to be used with one set of processor and light source device. For example, a certain medical user is used as a narrow-band observation endoscope, a surgical user is used as a fluorescence observation endoscope, and another surgical user is used as an infrared light observation endoscope. Applications such as by users, especially medical surgery, are conceivable.
Here, special light observation is performed according to the observation mode, such as the spectral characteristics of the illumination light supplied from the light source device, the transmission characteristics of the objective optical system of the endoscope, the type of the solid-state image sensor, the signal processing in the processor device, etc. Is different.
Thus, it is conceivable that the conventional light source device is provided with a special observation mode filter in an observation mode switching turret provided with a plurality of observation mode filters corresponding to the observation mode.
JP 2002-336196 A Japanese Patent Laid-Open No. 2000-41942 JP 2002-95635 A

On the other hand, among endoscopes, the setting contents differ depending on the type, such as for medical use and for surgical use.
For example, the flexible endoscope is provided with an air supply conduit, and air can be supplied from an air supply pump provided in the light source device. On the other hand, since a rigid endoscope does not have an air supply line, air cannot be supplied from an air supply pump provided in the light source device.

For this reason, when the light source device is connected to the flexible endoscope and is supplying air from the air supply pump, the air supply pump remains activated if the soft endoscope is removed and the rigid endoscope is connected. It is. In this case, the light source device needs to manually turn off the air pump.
Therefore, the conventional light source device needs to be changed by the user himself / herself depending on the endoscope to be connected, which is complicated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a light source device that can automatically change settings according to the type of endoscope to be connected.

The endoscope light source device according to the present invention, among the plurality of kinds of endoscopes, and one selectively connectable endoscope connection portion, provided in the endoscope connecting portion, the endoscope detection sensor for generating a detection signal for detecting the unconnected state endoscope connected to the endoscope connecting portion from the type or the endoscope connection portion of the endoscope connected to the connection portion is removed If, based on the detection signal generated by the detection sensor, a detection unit for detecting the type or the unconnected state of the connected endoscope, the type and the unconnected state of the plurality of types of endoscopes A memory that stores setting contents according to the control unit, and a control unit that performs control to read and set the corresponding setting contents from the setting contents stored in the memory based on the detection result of the detection unit , The detecting unit is connected to the endoscope connecting unit. When the detection signal has not changed during the first detection time for detecting the type of the connected endoscope, the type of the connected endoscope is detected, When the connected endoscope is removed from the endoscope connection portion, the detection signal is not connected during the second detection time for detecting the disconnection state. And the second detection time for detecting the unconnected state is set shorter than the first detection time for detecting the type of the connected endoscope. It is said.

  The light source device for an endoscope of the present invention has an effect that the setting can be automatically changed according to the type of endoscope to be connected.

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

  1 to 30 relate to an embodiment of the present invention, FIG. 1 is an overall configuration diagram showing an endoscope system provided with an endoscope light source device of the embodiment, and FIG. 2 is a diagram of the light source device of FIG. FIG. 3 is a block diagram showing the internal configuration of the control board of FIG. 2, FIG. 4 is a front view of the light source device of FIG. 1, and FIG. 5 is an enlarged view showing the configuration of the operation panel of FIG. 6 is a front view of a light source device showing a modification of FIG. 4, FIG. 7 is an enlarged view showing the configuration of the operation panel of FIG. 6, FIG. 8 is a schematic perspective view showing an optical path from the xenon lamp of FIG. Is a front view showing the vicinity of the observation mode switching turret of FIG. 8, FIG. 10 is a front view showing the vicinity of the dimming mesh turret of FIG. 8, and FIG. 11 is a front view of the dimming mesh turret showing the first modification of FIG. FIG. 12 is a front view of a dimming mesh turret showing a second modification of FIG. FIG. 14 is a perspective view showing a detailed configuration of the dimming mesh turret in FIG. 10, FIG. 14 is a perspective view showing a modified example of how to apply the dimming mesh in FIG. 13, and FIG. 15 shows the back side of the dimming mesh turret in FIG. FIG. 16 is a schematic explanatory view showing the positional relationship when the connector of the endoscope of FIG. 1 is connected to the light source, FIG. 17 is a perspective view showing the vicinity of the connector receiving portion of FIG. 8, and FIG. 19 is a cross-sectional view of the vicinity of the connector receiving portion of FIG. 18, FIG. 19 is a cross-sectional view when the light source connector of the normal flexible endoscope is connected to the connector receiving portion of FIG. 18, and FIG. FIG. 21 is a cross-sectional view when the light source connector of the endoscope is connected, FIG. 21 is a cross-sectional view when the light source connector of the normal rigid endoscope is connected to the connector receiving portion of FIG. 18, and FIG. Relationship between the second photosensor and the first and second protrusions FIG. 23 is a schematic explanatory diagram showing the relationship between the first and second photosensors and the first and second protrusions in FIG. 19, and FIG. 24 is a schematic diagram showing the first and second photosensors in FIG. FIG. 25 is a schematic explanatory diagram showing the relationship between the first and second protrusions, FIG. 25 is a schematic explanatory diagram showing the relationship between the third photosensor and the third protrusion, and the third photosensor is off. 26 shows the relationship between the third photosensor and the third protrusion, and is a schematic explanatory diagram showing a state in which the third photosensor is on. FIG. 27 is a main flowchart performed by the MPU. FIG. 28 is an endoscope performed by the MPU. FIG. 29 is a memory write control flowchart performed by the MPU, and FIG. 30 is an observation mode switching control flowchart performed by the MPU.

As shown in FIG. 1, the endoscope system 1 includes a plurality of types of endoscopes 2, an endoscope light source device (hereinafter simply referred to as a light source device) 3, a video processor 4, and a monitor 5. It is configured. A foot switch 6 is connected to the light source device 3.
The plurality of types of endoscopes 2 are a normal flexible endoscope 11, a normal rigid endoscope 13, and a high-brightness rigid endoscope 14.

A camera head 15 is attached to each of the normal rigid endoscope 13 and the high-brightness rigid endoscope 14. These camera heads 15 are provided with an electrical connector 17 at the end of the extending camera cable 16 and are detachably connected to the video processor 4. Although not shown in the drawing, the camera head 15 incorporates an image pickup device for picking up an endoscope image supplied from the normal rigid endoscope 13 or the high-brightness rigid endoscope 14.
In addition, the normal rigid endoscope 13 and the high-brightness rigid endoscope 14 are connected to an insertion portion 21 that is inserted into the abdominal cavity of a patient via a trocar (not shown), and a connection that is connected to the proximal end of the insertion portion 21. And an eye part 22.

The normal rigid endoscope 13 is provided with a light source connector 24c that is detachably connected to the light source device 3 at an end portion of a light guide cable 23 extending from the eyepiece 22. The high-brightness rigid endoscope 14 is provided with a light source connector 24d that is detachably connected to the light source device 3 at an end of a light guide cable 23 extending from the eyepiece 22.
The normal flexible endoscope 11 includes an elongated insertion portion 31 that is inserted into a body cavity, and an operation portion 32 that is connected to the proximal end side of the insertion portion 31.

The normal flexible endoscope 11 is provided with a light source connector 24 a that is detachably connected to the light source device 3 at the end of a universal cable 33 extending from the operation unit 32.
On the side of the light source connector 24a, an electric cable 35 extends and an electric connector 36 is provided at the end of the light source connector 24a so as to be detachably connected to the video processor 4.

  The insertion portion 31 includes a flexible flexible tube portion 37, a bending portion 38 provided on the distal end side of the flexible tube portion 37, and a distal end portion 39 provided on the distal end side of the bending portion 38. It is configured. The distal end portion 39 has a built-in image sensor, which will be described later, for imaging an observation site in the body cavity. In FIG. 1, the normal flexible endoscope 11 is connected to the light source device 3 and the video processor 4.

As shown in FIG. 2, the normal flexible endoscope 11 has a light guide 31a inserted therethrough. The light guide 31a is configured such that the light source connector 24a is detachably connected to the light source device 3 to supply illumination light.
Irradiation light supplied from the light source device 3 is transmitted to the distal end side of the insertion portion 31 by the light guide 31a. The illumination light transmitted to the emission end face of the light guide 31a illuminates the observation target portion of the subject from the illumination optical system 39a disposed on the end face.

In addition, an objective optical system 39b for taking in light from the observation target region and forming an optical image is disposed at the distal end portion 39 of the insertion portion 31 adjacent to the illumination optical system 39a. A CCD 39c is disposed behind the objective optical system 39b as an image sensor.
A signal line 31b extending from the CCD 39c is inserted through the insertion portion 31 and further through the electric cable 35 to the electric connector 36, and is electrically connected to the video processor 4 through the electric connector 36. It is like that. The CCD 39c is driven by a drive signal output from a CCD drive circuit (not shown) provided in the video processor 4. The CCD 39c photoelectrically converts the formed optical image and outputs an image pickup signal to the video processor 4.

  The video processor 4 processes the image pickup signal output from the CCD 39c of the normal flexible endoscope 11 by a video signal processing circuit (not shown) to generate a standard video signal, which is output to the monitor 5 It is displayed on the display screen of the monitor 5.

The normal flexible endoscope 11 is provided with an air supply line 31c. The air supply line 31c is configured such that the light source connector 24a is detachably connected to the light source device 3 to supply air.
The air supplied from the light source device 3 is transmitted to the distal end side of the insertion portion 31 through the air supply conduit 31c. The air transmitted to the exit end face of the air feed conduit 31c is sent from the nozzle 39d provided on the end face toward the most distal side of the objective optical system 39b.

  In the normal rigid endoscope 13 and the high brightness rigid endoscope 14, only the light guide 31a, the illumination optical system 39a, and the objective optical system 39b have the same configuration. The normal rigid endoscope 13 and the high-brightness rigid endoscope 14 are provided with an image transmission optical system (not shown) such as a relay lens system behind the objective optical system 39b. It is configured to be able to transmit an optical image.

Next, the light source device 3 will be described.
The light source device 3 includes a connector receiving portion 41 as an endoscope connecting portion, a xenon lamp 42 as a light source, a switching regulator 43, a temperature switch 44, a control board 45, and an endoscope connection detection sensor 46. , Front panel 47, optical system 48, aperture 49, observation mode switching turret 51, dimming mesh turret 52, air supply pump (hereinafter simply referred to as pump) 53, foot switch connection 54, automatic / A manual lighting changeover switch 55 and a communication connector 56 are provided.

The connector receiving portion 41 includes a light source connector 24a of the endoscope 2 (normally flexible endoscope 11 (two kinds of maximum light quantities can be set), normal rigid endoscope 13 and high-brightness rigid endoscope 14). , 24c, 24d are selectively detachably connected.
The connector receiving portion 41 is provided with the endoscope connection detection sensor 46.

  The endoscope connection detection sensor 46 includes, for example, first to third three photosensors to be described later, and detects the type of the endoscope 2 to be connected. The detailed configuration of the endoscope connection detection sensor 46 will also be described later.

Here, in the endoscope 2 (the normal flexible endoscope 11, the normal rigid endoscope 13, and the high-brightness rigid endoscope 14), the setting content of the light source device 3 differs depending on the type.
For example, the normal flexible endoscope 11 is provided with the air supply conduit 31c as described above, so that air can be supplied by the pump 53 of the light source device 3. On the other hand, the normal rigid endoscope 13 and the high-brightness rigid endoscope 14 do not need to supply air, so that the pump 53 is not used.

Further, in the endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14), the maximum amount of illumination light that can be incident is determined according to the type.
In the present embodiment, the type of the endoscope 2 (normal soft endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14) connected to the light source device 3 is detected, and the light source device 3 is automatically detected. Configured to set. In the present embodiment, the maximum amount of illumination light supplied according to the type of endoscope 2 connected to the light source device 3 is automatically set.

The xenon lamp 42 is a lamp using discharge in xenon gas. The spectrum of the xenon lamp 42 approximates natural sunlight, and natural light (high illuminance) light can be obtained.
The switching regulator 43 is a power supply stabilizing device of a type in which an input voltage is turned on / off (switching) at high speed and converted into a pulse to obtain a smooth and stable DC voltage. The switching regulator 43 converts the input voltage supplied from the control board 45 into a DC voltage and supplies it to each part of the apparatus.

The temperature switch 44 is disposed in the vicinity of the xenon lamp 42 and is turned on to output an on signal to the control board 45 when the temperature in the vicinity of the xenon lamp 42 reaches a predetermined value. By exchanging this signal, the control board 45 turns off the xenon lamp 42.
The automatic / manual lighting changeover switch 55 is a switch that can select whether the xenon lamp 42 is automatically turned on or manually turned on when the light source device 3 is turned on.

The communication connector 56 is connected to a communication cable 57 of the video processor 4.
The optical system 48 condenses the light generated by the xenon lamp 42 on the incident end face of the light guide 58 protruding from one of the light source connectors 24a, 24c, 24d that is selectively connected. It is composed of groups.

The observation mode switching turret 51, the dimming mesh turret 52, and the diaphragm 49 are arranged on the optical path constituted by these lens groups.
These turrets 51 and 52 and the diaphragm 49 are provided with motors 59a, 59b and 59c, respectively.

The diaphragm 49 is formed with a fan-shaped recess 49a (see FIG. 8), and the position of the fan-shaped recess 49a is moved on the optical path by driving the motor 59c so that the illumination light can be reduced to a desired light quantity. It has become.
In the observation mode switching turret 51 and the dimming mesh turret 52, desired filters are arranged on the optical path by driving motors 59a and 59b. The detailed configuration of the observation mode switching turret 51 and the dimming mesh turret 52 will be described later.

A foot switch cable 6 a of the foot switch 6 is connected to the foot switch connecting portion 54. The front panel 47 can perform various settings and various displays. The detailed configuration of the front panel 47 will be described later.
The pump 53 supplies air (Air) as air supply to the normal flexible endoscope 11. The air from the pump 53 is supplied to the normal flexible endoscope 11 from the connector receiving portion 41 through a pipe line (not shown).

The control board 45 includes an MPU (Micro Processing Unit) 61 for controlling each part of the apparatus, a ROM (Read Only Memory) or SRAM (Static Random Access Memory) (not shown) for storing a program of the MPU 61, and data during operation. FRAM (Ferroelectric Random Access Memory) 62 is stored.
Note that the FRAM 62 stores in advance the setting contents of the light source device 3 in accordance with the type of endoscope 2 connected as will be described later. Further, the setting contents can be rewritten.

  As shown in FIG. 3, in addition to the MPU 61 and the FRAM 62, the control board 45 includes an observation mode switching turret control unit 63, a dimming mesh turret control unit 64, an aperture control unit 65, an endoscope controlled by the MPU 61. A connection detection unit 66, a pump control unit 67, a lamp lighting control unit 68, a temperature switch detection unit 69, a foot switch detection unit 71, a communication control unit 72, an automatic / manual lighting switching control unit 73, and a front panel control unit 74 are provided. ing.

  The observation mode switching turret control unit 63 controls the motor 59a so that a desired optical filter of the observation mode switching turret 51 is disposed on the optical path. The observation mode switching turret 51 is provided with a spare halogen lamp 75 in case the xenon lamp 42 is cut off.

The observation mode switching turret controller 63 drives the motor 59a of the observation mode switching turret 51 so that the spare halogen lamp 75 enters the optical path when the xenon lamp 42 is turned off. It is designed to supply light.
The dimming mesh turret controller 64 controls the motor 59b so that a desired filter of the dimming mesh turret 52 is disposed on the optical path.

  The diaphragm control unit 65 controls the motor 59c to adjust the position of the diaphragm 49 so that the illumination light from the xenon lamp 42 has a desired light amount.

In this embodiment, when the light source connector (24a, 24c, 24d) of the endoscope 2 is disconnected from the connector receiving portion 41 or when the communication cable 57 is disconnected, the endoscope connection detecting portion 66 When the video processor 4 is powered off, the diaphragm 49 is controlled to have a predetermined opening.
Thereby, during inspection, the light source device 3 fully closes the diaphragm 49 when the endoscope connection detection unit 66 is erroneously detected due to failure or when the communication cable 57 is disconnected or disconnected. The amount of illumination light necessary for medical treatment can be maintained without having to

When the light source connector (24a, 24c, 24d) of the endoscope 2 is not connected, the connector receiving portion 41 causes unintended illumination light to be transmitted by the opening / closing member (a flexible member 106 in FIG. 18 described later). It does not come out from the receiving part 41.
On the other hand, the endoscope connection detection unit 66 detects an on / off signal from the endoscope connection detection sensor 46 and outputs it to the MPU 61.

The pump control unit 67 is configured to control and drive the pump 53.
The temperature switch detection unit 69 detects an ON signal from the temperature switch 44 and outputs it to the MPU 61.
The foot switch detection unit 71 detects an on / off signal of the foot switch and outputs it to the MPU 61.

The communication control unit 72 controls communication between the video processor 4 and the MPU 61.
The lamp lighting control unit 68 controls lighting of the xenon lamp 42.
The automatic / manual lighting switching control unit 73 detects a signal of the automatic / manual lighting switching switch 55 and outputs it to the MPU 61.

Here, when the power source is turned on, the conventional light source device is automatically turned on for surgical use (rigid endoscope) and manually turned on for medical use (flexible endoscope) due to the difference in use environment.
In this embodiment, the xenon lamp 42 can be automatically turned on and manually turned on when the light source device 3 is turned on in accordance with the user's usage environment.

In other words, the automatic / manual lighting changeover switch 55 is configured to automatically light the xenon lamp 42 when the power is turned on when the user has previously pressed and set the automatic setting. Further, the automatic / manual lighting changeover switch 55 is turned on by a switch on the operation panel (for example, “LAMP” switch 87a in FIG. 5) or the like when the user turns on the power when the manual setting is performed. It is designed to be done manually.
As a result, the light source device 3 can automatically turn on and manually turn on the xenon lamp 42 when the power is turned on in accordance with the use environment of the user.

The front panel control unit 74 controls various settings and various displays on the front panel 47 under the control of the MPU 61.
The MPU 61 controls each part in the light source device 3 by controlling each part of the control board 45 based on various settings operated on the front panel 74.

  In this embodiment, the connection state in the connector receiving portion 41 is detected, and various setting contents stored in the FRAM 62 are automatically set based on the connection state.

Next, the front panel 47 of the light source device 3 will be described.
As shown in FIG. 4, the front panel 47 of the light source device 3 is provided with a power switch 81, an operation panel 82, and the connector receiving portion 41.

On the power switch 81, a power display 81a is provided. That is, when the power switch 81 is pressed to turn on the power of the apparatus, the power display 81a is turned on to notify the power-on state.
One of the light source connectors 24a, 24c, and 24d of the endoscope 2 (the normal flexible endoscope 11, the normal rigid endoscope 13, and the high-brightness rigid endoscope 14) is selectively used as the connector receiving portion 41. To be connected to.

The operation panel 82 is configured, for example, as shown in FIG.
As shown in FIG. 5, the operation panel 82 includes a brightness display section 83, a spare lamp display section 84, an air supply setting display section 85, a usage time display section 86, a lamp control setting display section 87, and an illumination. A mode setting display unit 88 is provided.

The brightness display section 83 is provided with an indicator 83a for displaying the brightness of the xenon lamp 42. Further, the spare lamp display section 84 is lit when the xenon lamp 42 is turned off and the spare halogen lamp 75 of the observation mode switching turret 51 is switched.
The display blinks when the spare halogen lamp 75 is disconnected, disconnected, or not installed.

  The air supply setting display unit 85 includes an air supply on / off switch 85a and an air supply level switch 85b. The air supply on / off switch 85 a is a switch for supplying air to the endoscope 2. The air supply level switch 85b is a switch for setting the air supply level.

The usage time display unit 86 is provided with a counter reset switch 86 a and a usage time display unit 86 b for displaying the usage time of the xenon lamp 42.
The lamp control setting display section 87 includes a lamp on / off switch 87a, an automatic / manual setting switch 87b, and an operation button 87c.

The lamp on / off switch 87a is a switch for turning on / off the lamp after the power switch 81 is turned on. In the lamp on / off switch 87a, turning off is performed by long pressing so that the lamp is not inadvertently turned off.
The automatic / manual setting switch 87b is a changeover switch for performing the brightness adjustment automatically / manually.

The operation button 87c is a button for increasing / decreasing the brightness adjustment value when the brightness adjustment is performed manually. By appropriately operating these up and down buttons, the set value can be gradually increased or the set value can be gradually decreased.
The illumination mode setting display unit 88 includes a filter mode switch 88a and a special light observation display unit 88b.
The filter mode switch 88a is a switch for selecting a special light observation mode when performing special light observation.

  The special light observation display unit 88b is provided with mode LEDs 88c representing three usable special light observation modes (effective) such as narrow band light observation and fluorescence observation of special light observation. In FIG. 5, these mode LEDs 88c display three mode names of special light observation modes “A”, “B”, and “C”.

  In the special light observation display unit 88b, when the video processor 4 has a board on which the special light observation option function is mounted (may be a dip switch or the like), the power switch 81 is pressed to turn on the apparatus. In the state, the mode LED 88c corresponding to the usable special light observation mode is lit in green. For example, if the special light observations A and B are provided, the special light observation modes “A” and “B” are lit in green, and “C” remains off.

  In addition, when the endoscope 2 corresponding to each special light observation is connected, the special light observation display unit 88b has a mode LED 88c corresponding to the special light observation mode corresponding to the special observation mode of the connected endoscope 2. Only the indicator lights up in green and the other displays are turned off. For example, in the case of connection of an endoscope capable of special light observation A, the special light observation mode “A” remains green, “B” remains unlit, and “C” remains unlit.

  Further, at this time, the filter mode switch 88a is also lit and can be used as the filter mode switch 88a. Thereby, the special light observation display unit 88b is operated to depress the filter mode switch 88a to be in the special light observation mode, and the display corresponding to each special light observation is lit from green to white (the changeover switch is Depending on the setting, it may be a foot switch, an endoscope switch, etc.). For example, “A” switches from green lighting to white lighting. Further, the special light observation display section 88b is formed with a mode LED 88c so that the display (characters) can hardly be recognized when not illuminated.

The operation panel may be configured as shown in FIGS.
As shown in FIGS. 6 and 7, the operation panel 82B is provided with a special light observation mode display section 88d in the illumination mode setting display section 88B.
The special light observation mode display section 88d is provided with a dot LED 88e above each of the mode LEDs 88c.
The special light observation mode display section 88d is configured such that the dot LED 88e is turned on when the endoscope 2 corresponding to special light observation is connected and preparation for the corresponding special light observation mode is completed.

That is, the special light observation mode display section 88d lights up in green in the special light observation modes “A” and “B” in which the functions of the special light observations “A” and “B” are not mounted, for example. , “C” remains off.
Further, when the endoscope 2 capable of performing the special light observation “A” is connected to the light source device 3 in this state, the special light observation mode display unit 88d is provided above the special light observation “A”. Only the dot LED 88e is lit. If the endoscope 2 can perform “B”, the special light observation mode display unit 88d lights only the LED 88e above “B”.

At this time, the filter mode switch 88a is also lit, and the filter mode switch 88a is ready for use.
Then, when the filter mode switch 88a is pressed down, the light source device 3 allows the special light observation “A” of the mode LED 88c to be lit in white so that the special light observation “A” can be observed. I can show that.
When returning to the normal observation, when the light source device 3 depresses the filter mode switch 88a again, the special light observation “A” of the mode LED 88c is lit in green, and normal observation can be performed.

Next, detailed configurations of the observation mode switching turret 51 and the dimming mesh turret 52 will be described.
As shown in FIG. 8, the observation mode switching turret 51 is disposed on the xenon lamp 42 side, and the dimming mesh turret 52 is disposed on the connector receiving portion 41 side. The connector receiving portion 41 is provided with the endoscope connection detection sensor 46. The detailed configuration of the endoscope connection detection sensor 46 will be described later.
Each of the observation mode switching turret 51 and the dimming mesh turret 52 is provided with an initial position detection pin 89.

As shown in FIGS. 9 and 10, the observation mode switching turret 51 and the dimming mesh turret 52 detect the initial position of the rotational position by detecting the initial position detection pin 89 by the initial position detection switch 90, respectively. It is like that.
As shown in FIG. 9, the observation mode switching turret 51 is provided with five observation filters in addition to the spare halogen lamp 75.

  These observation filters are, for example, the infrared special observation light transmission filter 91a, the normal observation light transmission filter 91b, the narrow band special observation light transmission filter 91c, and the fluorescence special observation light transmission filter 91d in order from the right side of the spare halogen lamp 75. The normal observation light transmission filter 91e for fluorescence / infrared.

  The reason why such an arrangement is used is that a: normal 91b 通常 narrow band 91c, b: fluorescence / infrared 91e⇔fluorescence 91d, and c: fluorescence / infrared 91e⇔infrared 91a are mainly used. In these three cases, the initial position detection pin 89 must be moved to the reference position detected by the initial position detection switch 90 at least once. The turret 51 has an α direction (forward feed) and a β direction (reverse direction) shown in FIG. The turret 51 is arranged with a filter capable of maximizing the switching speed of each of the turret 51 by starting to turn the a and the b in the α direction (forward feed) and the c in the β direction (reverse feed). It has become.

As shown in FIG. 10, the dimming mesh turret 52 is provided with four dimming mesh filters 92a to 92d.
These light-reducing mesh filters 92a to 92d have a transmittance (spatial ratio) that increases in order from the left side, for example, and have transmittances of 50, 65, 75, and 100% (no mesh).

  In the light source device 3 of this embodiment, the light receiving connectors 24a, 24c, and 24d of the endoscope 2 (the normal flexible endoscope 11, the normal rigid endoscope 13, and the high brightness rigid endoscope 14) are connected to the connector receiving portion 41. In the case of pulling out from the case, or when making the initial setting, the turret 52 is set to the initial position, and the dimming mesh filter 92a having a transmittance of 50% is once arranged on the optical path.

Note that the light-reducing mesh turret may be configured as shown in FIG. 11 so that the light is not blocked even if the light-reducing mesh filters 92a to 92d are stopped for any reason other than the light-reducing mesh filters 92a to 92d.
As shown in FIG. 11, the dimming mesh turret 52 </ b> B has a light passage small hole 93 in order to prevent the illumination light from being completely blocked and not supplied to the endoscope 2.

The dimming mesh turret 52 is configured to be rotatable by a motor 59b, but may be a slide dimming mesh 52C as shown in FIG. It is configured to drive.
Accordingly, the dimming mesh turret 52C can be configured in the same manner as the rotational movement using the motor by moving in parallel by linear driving.

Next, a further detailed configuration of the dimming mesh turret 52 will be described.
As shown in FIGS. 13 to 15, the dimming mesh turret 52 is configured by attaching trapezoidal dimming mesh filters 92 a to 92 d to holes 94 in which four circles are formed in a rosary shape on a turret plate 52 a. Has been.

  The dimming mesh filters 92a to 92d are formed in a single layer or a plurality of layers by braiding thin wires having a diameter of a metal material or the like, and are bonded to the hole portion 94 (on one side or both sides). As described above, for example, the transmittance is 50, 65, 75, 100 (no mesh)%.

  14 and 15, the light-reducing mesh filters 92 a to 92 d are attached to the hole 94 without any gap from the front and the back. As a result, the mesh is displaced for some reason as compared to the one pasted on only one side shown in FIG. It can be pasted, can prevent unintended leakage light, and is easy to process.

  As will be described later, the combination of the dimming mesh filters 92a to 92d and the observation filters 91a to 91e is based on the endoscope 2 (normally flexible endoscope 11 (two kinds of maximum light quantities can be set), It is determined by a combination of the endoscope 13 and the high-brightness rigid endoscope 14) and the observation mode (normal observation, narrow band observation, infrared observation, narrow band / infrared normal observation).

First, endoscope type detection will be described.
The light source device 3 includes the light source connectors 24a, 24c, and 24d of the endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, and high brightness rigid endoscope 14) on the connector receiving portion 41. By selectively connecting one, the endoscope connection detection sensor 46 detects the endoscope type.

Here, as shown in FIG. 16, the endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14) has light source connectors 24a, 24c, and 24d. Yes.
In the light source connector 24a of the normal flexible endoscope 11, a light guide end portion 95 that is an incident end surface of the light guide 31a and an air supply end portion 96 of the air supply conduit 31c extend.

  On the other hand, the normal rigid endoscope 13 and the high-brightness rigid endoscope 14 extend only at the light guide end portion 95.

The light guide connector 24 d of the high-brightness rigid endoscope 14 is provided with a protrusion 97 at the light guide end portion 95. Thereby, the endoscope connection detection sensor 46 can detect a difference between the normal rigid endoscope 13 and the high-brightness rigid endoscope 14 as described later.
Although a soft endoscope corresponding to high luminance is also conceivable, a groove as shown by a broken line in FIG. 16 is formed at a position where a forward / backward member 104 of FIG. If it is formed so that it can be pushed only to the same position as the high-intensity rigid endoscope, this can be easily achieved.

Next, the detailed configuration of the endoscope connection detection sensor 46 will be described.
As shown in FIGS. 17 and 18, the endoscope connection detection sensor 46 is provided in the connector receiving portion 41.
The endoscope connection detection sensor 46 is constituted by three of first to third photosensors 101a to 101c.

The first and second photosensors 101a and 101b are attached to the first fixing member 102 and arranged in the axial direction. The third photosensor 101c is attached to the second fixing member 103 and is arranged in a different direction from the first and second photosensors 101a and 101b. The first fixing member 102 and the second fixing member 103 may be the same member.
Further, the connector receiving portion 41 is pressed by a pressing member 104a that is pressed by the distal end side of the light source connectors 24a, 24c, and 24d and that moves forward and backward with the insertion of one connected endoscope. An advance / retreat member 104 is provided.
The advance / retreat member 104 is provided with first and second protrusions 105a and 105b that can pass through the first and second photosensors 101a and 101b. Further, a flexible member (elastic material, for example, a leaf spring) 106 extends from the distal end side of the advance / retreat member 104. At the end of the flexible member 106, a third protrusion 105c that is pressed by the light guide end 95 and can pass through the third photosensor 101c as the light guide end 95 is inserted is provided. Yes.
Here, the first to third photosensors 101a to 101c are set to 1 (on) when light is not blocked, and the light is blocked by the first to third protrusions 105a to 105c. 0 (off).

  When the light source connectors 24a, 24c, and 24d shown in FIGS. 17 and 18 are not connected, the first and second photosensors 101a and 101b are blocked by the first and second protrusions 105a and 105b. The third photosensor 101c becomes 0 because light is blocked by the third protrusion 105c. That is, the first to third photosensors 101a to 101c are (1, 1, 0) (see FIGS. 22 and 25).

  Here, when the light source connectors 24a, 24c, 24d of the endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14) are inserted into the connector receiving portion 41. , 19, 20, and 21. The relationship between the first to third photosensors 101a to 101c and the first to third protrusions 105a to 105c is as shown in FIGS.

This will be described more specifically.
As shown in FIG. 19, the light source connector 24 a of the normal flexible endoscope 11 is inserted into the connector receiving portion 41. At this time, the first and second photosensors 101a and 101b shift from the state shown in FIG. 22 to the state shown in FIG.
As shown in FIG. 24, the first photosensor 101a is turned off because light is blocked by the first protrusion 105a, and the second photosensor 101b is not blocked by light by the second protrusion 105b. So turn on.

Further, the third photosensor 101c shifts from the state shown in FIG. 25 to the state shown in FIG. As shown in FIG. 26, the third photosensor 101c is turned on when the third protrusion 105c is moved by the tip side of the light guide end portion 95 and the light is not blocked.
As a result, the first to third photosensors 101a to 101c are not connected (1, 1, 0) when the light source connector 24a of the normal flexible endoscope 11 is connected to the connector receiving portion 41. (0, 1, 1).

As shown in FIG. 20, the light source connector 24 d of the high-brightness rigid endoscope 14 is inserted into the connector receiving portion 41. At this time, the first and second photosensors 101a and 101b shift from the state shown in FIG. 22 to the state shown in FIG.
As shown in FIG. 23, the first photosensor 101a is turned on because light is not blocked, and the second photosensor 101b is turned off because light is blocked by the second protrusion 105b.

  Similarly to the insertion of the normal flexible endoscope 11, the third photosensor 101c shifts from the state shown in FIG. 25 to the state shown in FIG. 26, and is turned on when light is not blocked.

  Thus, the first to third photosensors 101a to 101c are not connected (1, 1, 0) when the light source connector 24d of the high brightness rigid endoscope 14 is connected to the connector receiving portion 41. To (1, 0, 1).

  Further, as shown in FIG. 21, the light source connector 24 c of the normal rigid endoscope 13 is inserted into the connector receiving portion 41. At this time, since the advance / retreat member 104 is not pushed and does not move in parallel, the first and second photosensors 101a and 101b are in the same state as shown in FIG. become.

Similarly to the insertion of the normal flexible endoscope 11, the third photosensor 101c shifts from the state shown in FIG. 25 to the state shown in FIG. 26, and is turned on because the light is not blocked.
Accordingly, the first to third photosensors 101a to 101c are not connected (1, 1, 0) when the light source connector 24c of the normal rigid endoscope 13 is connected to the connector receiving portion 41. (1,1,1).
The states of the first to third photosensors 101a to 101c are summarized as shown in Table 1.

Note that the bottom row of Table 1 shows an error. In this case, the first to third photosensors 101a to 101c are a combination other than the above.
As a result, the light source device 3 can determine the connection state in the connector receiving portion 41, and the connected endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14). ) Type can be discriminated.

Therefore, the light source device 3 can set the mesh position of the mesh turret that determines each maximum allowable light quantity based on the connection state D (described later) in the connector receiving portion 41. Further, other setting contents can be set automatically.
The setting contents are as shown in Table 2, for example, and are stored in advance in the FRAM 62 as setting information.

Since the normal flexible endoscope 11 is provided with the air supply conduit 31c as described above, air can be supplied by the pump 53 of the light source device 3. On the other hand, the normal rigid endoscope 13 and the high brightness rigid endoscope 14 do not use the pump 53.
Furthermore, the illumination type switch and display on the operation panel may be turned on / off according to these setting items.

In addition to the types of the endoscope 2 (normal soft endoscope 11, normal rigid endoscope 13, high-brightness rigid endoscope 14), an observation mode (normal observation, narrow band observation, infrared observation, As shown in Table 3, combinations of the light-reducing mesh filters 92a to 92d and the observation filters 91a to 91e are determined depending on the combination with the type of narrow band / infrared normal observation).

Here, the light entering the endoscope 2 is, for example, a high-intensity light amount when the lamp light is 100.
100 (lamp light quantity) × 0.85 (the transmittance of the observation mode switching turret 51 is 85%) × 1 (the transmittance of the dimming mesh turret 52 is 100%) = 85.

As shown in FIG. 1, the light source device 3 configured in this manner includes a light source connector 24a of the endoscope 2 (normally flexible endoscope 11, normal rigid endoscope 13, high brightness rigid endoscope 14). , 24c, 24d are selectively detachably connected and used for endoscopy.
The user turns on the light source device 3 to activate the light source device 3 and performs endoscopy.

  If the automatic / manual lighting changeover switch 55 is set to the automatic side, the MPU 61 is detected by a detection signal from the automatic / manual lighting changeover control unit 73 that has received the signal of the automatic / manual lighting changeover switch 55. Controls the lamp lighting control unit 68 so that the xenon lamp 42 is lit when the power switch 81 is turned on.

  On the other hand, when the automatic / manual lighting changeover switch 55 is set to the manual side, the MPU 61 is operated by pressing the lamp on / off switch 87a of the operation panel 82 after the power switch 81 is turned on. The lamp lighting control unit 68 is controlled so that the xenon lamp 42 is lit.

Here, the MPU 61 of the light source device 3 controls each part of the apparatus by controlling each part of the control board 45 according to the main flowchart shown in FIG.
As shown in FIG. 27, when the power switch 81 is turned on to turn on the light source device 3 (step S1), the MPU 61 performs initial setting (step S2).
At the same time, the MPU 61 starts a 100 ms count by a 100 ms timer (step S3).

  Here, the MPU 61 assigns the connection state D, which is the connection detection result at that time, to the connection state determination buffer SJ every 100 ms, and the connection state determination buffer SJ (D) changes until 200 ms (noise and chattering removal). If not, the connection state is determined to be the connection state D. The connection state determination buffer SJ is provided in the FRAM 62.

  First, the MPU 61 assigns 0 to the connection determination time counter t (step S4), and determines the connection state D in the connector receiver 41 detected by the endoscope connection detection unit 66 (step S5). The connection determination time counter t indicates that 100 ms has elapsed when t = 1, and 200 ms has elapsed when t = 2.

Here, the endoscope connection detection unit 66 is based on the on / off signal input from the endoscope connection detection sensor 46 (first to third photosensors 101a to 101c) as shown in Table 1 above. As the connection state D, five values 1 to 5 shown below are taken.
Usually, when the flexible endoscope 11 is connected, the connection state D = 0,
When the normal rigid endoscope 13 is connected, the connection state D = 2,
When the high-intensity rigid endoscope 14 is connected, the connection state D = 3,
When not connected, connection state D = 4
When an error has occurred, connection state D = 5.

Next, the MPU 61 determines whether or not the connection determination time counter t is other than 0 (step S6).
If the connection determination time counter t is other than 0, the MPU 61 determines whether or not the connection state determination buffer SJ is in the connection state D (step S7).
When the connection state determination buffer SJ is in the connection state D, the MPU 61 proceeds to the next step.

If the connection state determination buffer SJ is not in the connection state D, the MPU 61 assigns 0 to the connection determination time counter t (step S8) and proceeds to the next step.
When the connection determination time counter t is 0, the MPU 61 assigns 0 to the connection state determination buffer SJ (step S9).

Next, the MPU 61 determines whether 100 ms has elapsed (step S10).
The MPU 61 repeats S10 until 100 ms elapses.
Next, the MPU 61 determines whether or not the connection determination time counter t has reached t = 2 (step S11).

If the connection determination time counter t is not t = 2, the MPU 61 substitutes t + 1 for the connection determination time counter t (step S12), and repeats S5 to S12.
When the connection determination time counter t is t = 2, the MPU 61 assumes that the connection state of the endoscope 2 is D (step S13), reads the setting information of the connection state D from the FRAM 62, and sets the operation of the light source. (Step S14).

Here, the setting information of the connection state D has the setting contents as shown in Table 2 above, and the light source device 3 is set according to the setting contents.
Then, the MPU 61 starts normal operation of the light source device 3 (step S15).
The user depresses the filter mode switch 88a of the illumination mode setting display unit 88 to select a special light observation mode displayed on the special light observation display unit 88b.

In the light source device 3, the MPU 61 controls each part of the control board 45 based on the selected special light observation mode, thereby controlling each part of the device.
Here, the MPU 61 controls and drives the motor 59a by controlling the observation mode switching turret control unit 63 so that an observation filter corresponding to the selected observation mode among the observation filters 91a to 91e is arranged on the optical path. Let

At the same time, the MPU 61 controls the dimming mesh turret control unit 64 so that the dimming mesh filter corresponding to the selected observation mode among the dimming mesh filters 92a to 92d is arranged on the optical path, thereby controlling the motor 59b. Is controlled and driven.
Further, the MPU 61 controls the diaphragm control unit 65 so as to control the drive of the motor 59c so that the diaphragm 49 reduces the amount of illumination light according to the selected observation mode.

In addition, during the endoscopic examination, for example, the user may remove the high-brightness rigid endoscope 14 from the light source device 3 and connect the normal rigid endoscope 13 to the light source device 3 for use.
In this case, in the light source device 3, during the high luminance mode, the light source connector 24d of the high luminance rigid endoscope 14 is pulled out from the connector receiving portion 41, and the light source connector 24c of the normal rigid endoscope 13 is newly connected to the connector receiving portion 41. Connected to.

At this time, the normal rigid endoscope 13 needs to prevent the illumination light with high luminance from being supplied from the light source device 3.
Therefore, the light source device 3 sets the maximum amount of illumination light low when the light source connector 24d of the high-brightness rigid endoscope 14 is removed from the connector receiving portion 41 in the high-brightness mode. The same applies when the high-brightness rigid endoscope 14 is reconnected to the normal flexible endoscope 11.

  As shown in Table 3, the MPU 61 has a combination of the observation filters 91a to 91e of the observation mode switching turret 51 and the dimming mesh filters 92a to 92d of the dimming mesh turret 52 so that a high intensity light amount is normal. Control is performed so as not to be supplied to the endoscope 11.

Here, in the endoscope connection detection unit 66, the light source connectors (24a, 24c, 24d) are connected to the connector receiving unit 41 according to the detection time of the on / off signal detected by the endoscope connection detection sensors 101a to 101c. It changes when it is removed and when it is removed.
That is, the endoscope connection detection unit 66 is an on / off signal detected by the endoscope connection detection sensors 101a to 101c when the light source connectors (24a, 24c, 24d) are connected to the connector receiving unit 41. The endoscope 2 is detected by extending the detection time.

  On the other hand, the endoscope connection detection unit 66 detects an on / off signal detected by the endoscope connection detection sensors 101a to 101c when the light source connector (24a, 24c, 24d) is removed from the connector receiving unit 41. The time is shortened and the setting of the light source device 3 is quickly changed to the setting when not connected. At this time, the diaphragm 49 is controlled to be, for example, half open as described above.

Here, the MPU 61 of the light source device 3 controls each part of the apparatus by controlling each part of the control board 45 according to the endoscope switching control flowchart shown in FIG.
As shown in FIG. 28, the MPU 61 determines whether or not 100 ms has elapsed since the normal operation (step S15 ′) (step S16).
The MPU 61 repeats S16 until 100 ms elapses.

Next, the MPU 61 determines the connection state D detected by the endoscope connection detection unit 66 as in S5 (Step S17).
Next, the MPU 61 determines whether or not the connection state determination buffer SJ is in the connection state D (step S18).
If the connection state determination buffer SJ is not in the connection state D, the MPU 61 assigns D to the connection state determination buffer SJ (step S19), assigns 0 to the connection determination time counter t (step S20), and returns to S16.

On the other hand, when the connection state determination buffer SJ is in the connection state D, the MPU 61 determines whether or not the connection determination time counter t is 0 (step S21).
When the connection determination time counter t is 0, the MPU 61 substitutes t + 1 for the connection determination time counter t (step S22), and returns to S16.
If the connection determination time counter t is not 0, the MPU 61 determines whether the connection state D is 0, 2 or 3 (step S23).
When the connection state D is 0, 2 or 3, the MPU 61 determines whether or not the connection determination time counter t is 14.
If the connection determination time counter t is not 14, the MPU 61 substitutes t + 1 for the connection determination time counter t (step S22), and returns to S16.

On the other hand, when the connection determination time counter t is 14, the MPU 61 assumes that the connection state of the endoscope 2 is D (step S25), reads the setting information of the connection state D from the FRAM 62, and sets the operation of the light source ( Step S26).
Then, the MPU 61 returns to the normal operation of the light source device 3 (step S27).

On the other hand, when the connection state D is not 0, 2 or 3, the MPU 61 determines whether or not the connection state D is 4 (step S28).
When the connection state D is 4, the MPU 61 determines whether or not the connection determination time counter t is 1 (step S29).

If the connection determination time counter t is not 4, the MPU 61 substitutes t + 1 for the connection determination time counter t (step S22), and returns to S16.
On the other hand, when the connection determination time counter t is 4, the MPU 61 assumes that the connection state of the endoscope 2 is D (step S25), reads the setting information of the connection state D from the FRAM 62, and sets the operation of the light source ( Step S26).

Then, the MPU 61 returns to the normal operation of the light source device 3 (step S27).
On the other hand, if the connection state D is not 0 or 4, the MPU 61 determines that the connection state D is 5 (step S30), and then determines whether or not the connection determination time counter t is 4 (step S31).

If the connection determination time counter t is not 4, the MPU 61 substitutes t + 1 for the connection determination time counter t (step S22), and returns to S16.
On the other hand, when the connection determination time counter t is 4, the MPU 61 assumes that the connection state of the endoscope 2 is D (step S25), reads the setting information of the connection state D from the FRAM 62, and sets the operation of the light source ( Step S26).
Then, the MPU 61 returns to the normal operation of the light source device 3 (step S27).

Thereby, the light source device 3 can set the setting content according to the connected endoscope 2 even if, for example, the endoscope 2 is replaced and connected during the endoscopic examination.
When the connection state D is 5, the MPU 61 notifies the error, and the setting is set to the connection setting of the normal rigid endoscope 13 so that the minimum necessary inspection can be continued.

  In addition, during the endoscopic examination, the user may change the setting content on the operation panel 82 of the front panel 47, for example. In this case, the light source device 3 controls each part of the apparatus by controlling each part of the control board 45 based on the setting contents changed by the control of the MPU 61.

Here, the MPU 61 of the light source device 3 writes the changed setting contents in the FRAM 62 according to the memory write control flowchart shown in FIG.
As shown in FIG. 29, the MPU 61 determines whether or not the setting has been changed by a switch (SW) provided on the operation panel 82 of the front panel 47 during normal operation (step S15 ′) (step S32).

The MPU 61 repeats S32 until the setting is changed by the switch on the operation panel 82.
If the setting has been changed by the switch on the operation panel 82, the MPU 61 determines whether or not the connection state D is 4 or 5 (step S33).

If the connection state D is not 4 or 5, the MPU 61 writes the setting change contents in the memory area of the FRAM 62 corresponding to the current connection state D and the memory area of the FRAM 62 in the connection state D = 4 (step S34), and proceeds to S32. Return.
On the other hand, when the connection state D is 4 or 5, the MPU 61 determines whether or not the connection state D is 4 (step S35).

When the connection state D is 4, the MPU 61 changes the setting to the memory area of the FRAM 62 in the connection state D = 4 and the memory area of the FRAM 62 in the connection state D (0, 2 or 3) corresponding to the connection state D = 4. Is written (step S36), and the process returns to S32.
On the other hand, when the connection state D is not 4, the MPU 61 returns to S32.

Thereby, when the light source device 3 stores the changed setting contents in the FRAM 62 and starts up next time, each unit of the apparatus can be set according to the stored setting contents.
In addition, the user may change the observation mode with the operation panel 82 of the front panel 47 during the endoscopic examination, for example.

The user depresses the filter mode switch 88a of the illumination mode setting display unit 88 to select a special light observation mode displayed on the special light observation display unit 88b.
In the light source device 3, the MPU 61 controls each part of the control board 45 based on the selected special light observation mode, thereby controlling each part of the device.

Here, the MPU 61 of the light source device 3 performs observation mode switching according to the observation mode switching control flowchart shown in FIG.
As shown in FIG. 30, in the light source device 3, an observation mode change request is generated by a switch (filter mode switch 88a of the illumination mode setting display unit 88) provided on the operation panel 82 of the front panel 47 (step S41).

Then, the MPU 61 determines whether or not the transmittance of the current observation mode switching turret 51 is larger than the transmittance of the dimming mesh turret 52 (step S42).
When the transmittance of the current observation mode switching turret 51 is larger than the transmittance of the dimming mesh turret 52, the MPU 61 starts switching the observation mode switching turret 51 (step S43).

The MPU 61 controls and drives the motor 59a by controlling the observation mode switching turret control unit 63 so that an observation filter corresponding to the selected observation mode among the observation filters 91a to 91e is arranged on the optical path.
Then, the MPU 61 completes switching of the observation mode switching turret 51 (step S44).

Next, the MPU 61 starts switching the dimming mesh turret 52 (step S45). The MPU 61 controls the motor 59b by controlling the dimming mesh turret control unit 64 so that the dimming mesh filter corresponding to the selected observation mode among the dimming mesh filters 92a to 92d is arranged on the optical path. Drive.
Then, the MPU 61 completes the switching of the dimming mesh turret 52 (step S46), and the observation mode change is completed (step S47).

On the other hand, when the transmittance of the current observation mode switching turret 51 is smaller than the transmittance of the dimming mesh turret 52, the MPU 61 starts switching the dimming mesh turret 52 (step S48).
The MPU 61 controls the motor 59b by controlling the dimming mesh turret control unit 64 so that the dimming mesh filter corresponding to the selected observation mode among the dimming mesh filters 92a to 92d is arranged on the optical path. Drive.

Then, the MPU 61 completes switching of the dimming mesh switching turret (step S49).
Next, the MPU 61 starts switching the observation mode switching turret 51 (step S50).
The MPU 61 controls and drives the motor 59a by controlling the observation mode switching turret control unit 63 so that an observation filter corresponding to the selected observation mode among the observation filters 91a to 91e is arranged on the optical path.

Then, the MPU 61 completes the switching of the observation mode switching turret 51 (step S51), and the observation mode change is completed (step S47).
Thereby, the light source device 3 can automatically change the setting according to the changed observation mode even if the observation mode is changed during operation.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

  The endoscope light source device according to the present invention can automatically change the setting according to the type of endoscope to be connected. Therefore, one of a plurality of types of endoscopes in the medical field and industrial field. It is suitable when you can connect selectively.

It is a whole lineblock diagram showing an endoscope system provided with an endoscope light source device of one example. It is a block diagram which shows the internal structure of the light source device of FIG. It is a block diagram which shows the internal structure of the control board of FIG. It is a front view of the light source device of FIG. It is an enlarged view which shows the structure of the operation panel of FIG. It is a front view of the light source device which shows the modification of FIG. It is an enlarged view which shows the structure of the operation panel of FIG. It is a schematic perspective view which shows the optical path from the xenon lamp of FIG. It is a front view which shows the observation mode switching turret vicinity of FIG. It is a front view which shows the dimming mesh turret vicinity of FIG. It is a front view of the light-reduction mesh turret which shows the 1st modification of FIG. It is a front view of the light-reduction mesh turret which shows the 2nd modification of FIG. It is a perspective view which shows the detailed structure of the dimming mesh turret of FIG. It is a perspective view which shows the example of a change of how to attach the light reduction mesh of FIG. It is a perspective view which shows the back side of the dimming mesh turret of FIG. It is a schematic explanatory drawing which shows the positional relationship of the state in which the connector of the endoscope of FIG. 1 was connected to the light source. It is a perspective view which shows the connector receiving part vicinity of FIG. It is sectional drawing of the connector receiving part vicinity of FIG. It is sectional drawing when the light source connector of a normal flexible endoscope is connected to the connector receptacle part of FIG. It is sectional drawing when the light source connector of a high-intensity rigid endoscope is connected to the connector receptacle part of FIG. It is sectional drawing when the light source connector of a normal rigid endoscope is connected to the connector receiving part of FIG. It is a schematic explanatory drawing which shows the relationship between the 1st, 2nd photosensor in FIG. 18, and a 1st, 2nd projection part. It is a schematic explanatory drawing which shows the relationship between the 1st, 2nd photosensor in FIG. 19, and a 1st, 2nd projection part. It is a schematic explanatory drawing which shows the relationship between the 1st, 2nd photosensor in FIG. 20, and a 1st, 2nd projection part. It is a schematic explanatory drawing of the state which shows the relationship between a 3rd photosensor and a 3rd projection part, and the 3rd photosensor is OFF. It is a schematic explanatory drawing of the state which shows the relationship between a 3rd photosensor and a 3rd projection part, and the 3rd photosensor is ON. It is a main flowchart which MPU performs. It is an endoscope switching control flowchart which MPU performs. It is a memory write control flowchart which MPU performs. It is an observation mode switching control flowchart which MPU performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endoscope system 2 Endoscope 3 Light source apparatus 4 Video processor 11 Normal flexible endoscope 13 Normal rigid endoscope 14 High-intensity rigid endoscope 15 Camera head 24a, 24c, 24d Light source connector 41 Connector receiving part 42 Xenon Lamp 45 Control board 46 Endoscope connection detection sensor 47 Front panel 49 Aperture 51 Observation mode switching turret 52 Dimming mesh turret 61 MPU
62 FRAM
63 Observation mode switching turret control unit 64 Dimming mesh switching turret control unit 65 Aperture control unit 66 Endoscope connection detection unit 91a to 91e Observation filter 92a to 92d Dimming mesh filter 101a to 101c First to third photo sensors Agent Patent Attorney Susumu Ito

Claims (1)

An endoscope connecting portion capable of selectively connecting one of a plurality of types of endoscopes;
The endoscope provided in the endoscope connecting portion and the type of endoscope connected to the endoscope connecting portion or the endoscope connected to the endoscope connecting portion from the endoscope connecting portion has not been removed. A detection sensor that generates a detection signal for detecting a connection state ;
A detection unit for the basis of the detection signal generated by the detection sensor, detects the type or the unconnected state of the connected endoscope,
A memory for storing the type and settings of the corresponding unconnected state of the plurality of types of endoscopes,
Based on the detection result of the detection unit, a control unit that performs control to read and set the corresponding setting content from the setting content stored in the memory;
Equipped with,
The detection unit changes during a first detection time for detecting the type of the connected endoscope when the endoscope is connected to the endoscope connection unit. If there is no, the type of the connected endoscope is detected, and the detection signal detects the unconnected state when the connected endoscope is removed from the endoscope connecting portion. If there is no change during the second detection time, the unconnected state is detected,
The second detection time for detecting the unconnected state is set shorter than the first detection time for detecting the type of the connected endoscope. Mirror light source device.

Images