JP2001343595A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the abnormal rotation of a turret, and also, to present an operating state to an operator. SOLUTION: When a power source is turned on, a stepping motor 20 is driven so as to rotate the turret. When a toggle changeover switch 11 is operated by a positioning pin 10, the rotation of the stepping motor 20 is stopped, then, the initial position of the turret is decided. Thus, the open-loop rotation of the turret is controlled. In the case the turret does not reach the initial position after a lapse of prescribed time, the warning is given to the operator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a light source device suitable for an endoscope device and the like.

[0002]

2. Description of the Related Art Conventionally, by inserting an elongated insertion portion into a body cavity, various organs in the body cavity can be observed or, if necessary, various treatments and treatments can be performed using a treatment tool inserted into a treatment tool channel. Endoscopes that can be used are widely used. When performing inspection / observation or treatment using the endoscope, a control device such as a camera control unit as a peripheral device of the endoscope constituting the endoscope system, a light source device for supplying illumination light, a portion to be inspected A monitor for displaying the endoscope image of the camera is required.

In a conventional light source device used for an endoscope, a plurality of filters are used to adjust an appropriate light amount and color tone according to the type of a body cavity to be observed, exposure at the time of photographing, the light amount of a light source lamp, and the like. It is prepared and used by selecting it. Also, when the light source lamp burns out during use,
Emergency lights are available for immediate replacement.

[0004] These filters and emergency lights are arranged along the circumferential direction of the turret provided rotatably. Then, by rotating the turret, necessary filters and emergency lights are positioned on the output optical path.

As a light source device capable of switching between a filter and an emergency light, there is one proposed in Japanese Patent Application Laid-Open No. 60-22112. In this proposal, a DC motor is used to control the rotation of a plurality of filters, and position control is performed by installing a position detection member on each filter and detecting the position of each filter.

Japanese Patent Application Laid-Open No. 9-10174 discloses an apparatus in which a stepping motor is used for a plurality of lamp switching mechanisms, and a position detection mechanism is provided for each lamp to perform position control.

[0007]

However, in the devices disclosed in JP-A-60-22112 and JP-A-9-10174, the position of each filter is controlled by using a position detecting member. However, there is a problem that it is difficult for the operator to grasp the positions of the filter and the emergency light.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a light source device that allows an operator to easily grasp the operation states of a filter and a lamp.

[0009]

According to a first aspect of the present invention, there is provided a light source device comprising a turret for selectively mounting an emergency light and at least one or more optical filters on an optical path of an illumination lamp by detachably mounting the emergency light and at least one optical filter. A stepping motor to be driven, a positioning pin provided on the turret, a toggle changeover switch provided on a movement trajectory of the positioning pin, and driving the stepping motor every time power is supplied;
Control means for performing a position confirmation operation of the turret by detecting that the positioning pin has operated the toggle switch; and a time required for the positioning pin to operate the toggle switch during the position confirmation operation. And a presenting means for presenting to the operator that the time measured by the timer deviates by a predetermined value or more from the set time, according to claim 2 of the present invention. The light source device according to claim 1, wherein the presenting means performs at least one of display and audio, and the light source device according to claim 3 of the present invention is arranged such that the presenting means is provided on a system monitor. The brightness is displayed by an index bar that displays the brightness.

In the first aspect of the present invention, the rotation position control of the turret to which one or more optical filters and the emergency light are fixed is performed by using a stepping motor connected to the turret. Performs the turret position confirmation operation. At the time of this position confirmation operation, if the time measured by the timer also deviates by a predetermined value or more, it is presented to the operator.

In claim 2 of the present invention, the presentation is performed by at least one of display and sound.

In the third aspect of the present invention, the presentation is performed by displaying an index bar for displaying the brightness on a monitor of the system.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 8 relate to a light source device according to a first embodiment of the present invention, and FIGS.
FIG. 3 is an explanatory view showing the structure of a drive device for switching between a filter and a lamp, FIG. 3 is a block diagram showing an electrical configuration of a switching mechanism, FIG. 4 is a circuit diagram showing the switching mechanism, and FIGS.
Is a flowchart showing an operation flow in circuit driving,
FIG. 8 is a plan view showing the appearance of the front panel. This embodiment is applied to an endoscope apparatus.

FIG. 1 shows a switching driving device built in a device housing. On a front panel 1 constituting a front surface of the device housing, a socket 2 penetrating the panel 1 is provided. A light guide tube 4 provided at an extension end of a light guide cord of an endoscope (not shown) is detachably attached to the socket 2.

The light source lamp 5 is composed of a xenon lamp or the like, and emits illumination light for an endoscope. The long axis of the light guide tube 4 is located on the emission optical path L (two-dot chain line) of the light source lamp 5 (xenon lamp). Condensing lens 12
Is designed to collect the light emitted from the light source lamp 5,
The light emitted from the light source lamp 5 condensed by the condenser lens 12 is guided to the end face of the light guide tube 4.

An aperture blade 6 is interposed on the exit light path L between the condenser lens 12 and the light guide tube 4. The aperture drive motor 3 has a rotation axis parallel to the exit optical path L, and drives the aperture blade 6 to rotate on a plane perpendicular to the exit optical path L. This allows
The diaphragm blade 6 is moved in and out of the output optical path L (on the optical path from the condenser lens 12) to adjust the light from the condenser lens 12 entering the light guide tube 4.

On the emission optical path L between the light source lamp 5 and the condenser lens 12, one circumference of a turret (filter fixed rotary plate) 7 on a disk is interposed. Around the turret 7, another auxiliary lamp (halogen lamp, hereinafter referred to as an emergency light) 8 is provided separately from the light source lamp 5.
And a plurality (two in the example of FIG. 1) of filters 9 that can be attached and detached by an operator, such as an infrared transmission filter, an ultraviolet transmission filter, and an infrared ultraviolet cut filter.
a, 9 b (hereinafter, typically referred to as a filter 9) are attached at intervals in the circumferential direction of the turret 7.

The turret 7 is rotatable about a rotation axis parallel to the output optical path L, and its peripheral portion is located on the output optical path L. By rotating the turret 7 about the rotation axis, the plurality of filters 9 and the emergency light 8 circumferentially arranged on the periphery of the turret 7 are rotationally moved and selectively arranged at positions on the emission optical path L. It is supposed to be.

The emergency light 8 includes a reflector (not shown) and a socket for mounting the emergency light 8,
A lead wire is connected to the socket of the emergency light, and the other end of the lead wire is led to the power supply unit 13 (see FIG. 3).

The stepping motor 20 has a rotation axis parallel to the emission optical path L, and a coupling (not shown) attached to this rotation axis fits on the rotation axis of the turret 7. By rotating the rotation shaft of the stepping motor 20 by a predetermined amount in the forward and reverse directions, the turret 7 can be rotated in the forward and reverse directions and stopped at an arbitrary rotation position.

On the periphery of the turret 7, one positioning pin 10 is fixed upright. And turret 7
The lever 11a of the toggle switch 11 is arranged at a predetermined position on the rotation trajectory of the positioning pin 10 accompanying the rotation of. The toggle switch 11 is mounted on a mounting base (not shown), and the lever 11a is implanted from the base 11b of the toggle switch 11 toward the center of the turret 7 in the radial direction. The lever 11a is “right”,
It takes three states of “middle” and “left”, and if no external force is applied, the long axis is located at a “middle” position (neutral position) in the radial direction of the turret 7. This state is an OFF state of the toggle switch 11. With the rotation of the turret 7,
When the positioning pin 10 rotates and the pin 10 pushes the lever 11a in the circumferential direction of the turret 7, the lever 11
"a" is at the "right" or "left" position, and the toggle switch 11 is turned on. That is, the toggle switch 11 is always turned on once by turning the turret 7 once in either the forward or reverse direction.

The light source lamp 5, the emergency light 8 and the stepping motor 20 are controlled by a micro control unit (hereinafter referred to as a microcomputer) 21 shown in FIGS. Referring to FIG.
Supplies a power supply voltage to the light source lamp 5 and the emergency light 8 under the control of the microcomputer 21. The power supply unit 13 is provided with a current detection circuit (not shown) for determining whether the light source lamp 5 is turned on. Further, the current detection circuit of the power supply unit 13 is configured to determine the state of disconnection of the emergency light 8 by constantly supplying a small current to the emergency light 8.

When the microcomputer 21 detects an abnormality or the like of the turret 7, the warning generating section 15 generates a warning to the operator. For example, the warning generator 1
5 can generate a warning by displaying an index bar indicating the brightness on the monitor of the system.

The microcomputer 21 receives an operation signal based on various operations of the front panel 1 and controls each unit according to the operation signal. The microcomputer 21 controls the rotation of the turret 7 based on the operation signal.

That is, as shown in FIG.
Is the basic clock CL for the motor driver 23.
K, and outputs a rotation direction signal CW. In addition, the microcomputer 21
Also outputs an output permission signal ENM. This output enable signal E
NM is applied to a NOR circuit 24. The NOR circuit 24 is also supplied with an output enable signal ENSW from a driver enable circuit 22 described later. The NOR circuit 24 generates an enable signal EN by NOR operation of the two output enable signals ENM and ENSW and outputs the enable signal EN to the motor driver 23. I do. The output of the motor driver 23 is enabled (enabled) when the enable EN signal is “H”, and output is disabled (disabled) when the enable EN signal is “L”.

The motor driver 23 is a driver for driving the stepping motor 20 to rotate. The motor driver 23 receives a basic clock CLK for driving the stepping motor 20 from the microcomputer 21, a rotation direction signal CW for determining the direction of rotation of the stepping motor 20, and an excitation signal (not shown) for determining an excitation method for the stepping motor 20. Microsteps such as two-phase excitation drive are also possible) and each winding output of the stepping motor 20 (φ1
φ4) based on the enable signal EN for permitting output
The stepping motor 20 is driven to rotate.

That is, the motor driver 23 determines the rotation speed based on the basic clock CLK and the excitation signal, and when the enable signal EN is at a high level (hereinafter, referred to as “H”), the rotation speed is indicated by the rotation direction signal CW. Then, the stepping motor 20 is rotated in the direction to be rotated. That is, the basic clock CL
K is input to the motor driver 23 at a set constant frequency, and the stepping motor 20 can be rotated at a constant speed according to the excitation method of the excitation signal. The motor driver 23 outputs a pulse POT having a cycle that is an integral multiple of the cycle of the basic clock CLK to the microcomputer 21.

The toggle switch 11 is for detecting the position of the turret 7. In the present embodiment, the toggle changeover switch 11 detects an abnormal rotation of the turret 7 and the like. Toggle switch 11
Are terminals SWINIT, SW to which the power supply voltage VCC is supplied.
When the lever 11a is located at the neutral position, the terminals SWINIT and SWEND are at "H". When the lever 11a is located at "right" or "left", the terminals SWINIT and SWEND are connected. SWEND is at a low level (0 V, hereinafter referred to as “L”). When the positioning pin 10 pushes the lever 11a by the right (clockwise) rotation of the turret 7, the lever 11a is located at the "right", and the rotation of the left (counterclockwise) causes the pin 10 to move to the lever. When 11a is pushed, lever 11a
Is located on the “left”.

The driver enable circuit 22 includes inverters 25 to 27, AND circuits 28 and 29, and an OR circuit 3.
0. The terminals SWINIT and SWEND of the toggle switch 11 are connected to the inverter 25,
26 input terminals. Inverters 25 and 26 are
The level of the input terminal is inverted and applied to one input terminal of AND circuits 28 and 29.

The inverter 27 receives the rotation direction signal CW from the microcomputer 21 and supplies an inverted signal to the other input terminal of the AND circuit 28. The other input terminal of the AND circuit 29 receives the rotation direction signal CW from the microcomputer 21 as it is. Each of the AND circuits 28 and 29 performs an AND operation on two inputs, and outputs the operation result to the OR circuit 30. The OR circuit 30 outputs a 2-input OR operation result to the output enable signal ENSW
To the NOR circuit 24.

When the toggle switch 11 is in the neutral state, the terminals SWINIT and SWEND are at "H" and the outputs of the inverters 25 and 26 are at "L".
The outputs of the ND circuits 28 and 29 are also "L". Therefore, in this case, the output permission signal ENSW from the driver enable circuit 22 is always "L".

In the NOR circuit 24, one of two inputs is "H".
In this case, an "L" enable signal EN for disabling the output of the motor driver 23 is output. That is, when the toggle switch 11 is in the neutral state, the state of the enable signal EN provided to the motor driver 23 is determined by the output permission signal ENM from the microcomputer 21.

The rotation direction signal CW is "L" and the turret 7
Indicates a clockwise rotation, and "H" indicates a counterclockwise rotation. When the microcomputer 21 instructs the turret 7 to rotate in the clockwise direction, an “L” rotation direction signal indicates
The output of D circuit 29 is always "L". Therefore, in this case, the output permission signal ENSW is determined by the output of the AND circuit 28, that is, the state of the toggle switch 11. That is, in this case, the toggle switch 1
When the lever 11a of the 1 is in the “right” state,
An output enable signal ENSW of "H" for inhibiting output is output.

When the microcomputer 21 instructs the turret 7 to rotate counterclockwise, the output of the AND circuit 28 is always "L" by the "H" rotation direction signal. Therefore, in this case, the lever 1 of the toggle switch 11
Only when the state of the signal 1a becomes the "left" state, the output enable signal ENSW of "H" for inhibiting the output is output.

The output of the inverter 25 is a signal INTS for notifying the abnormal rotation of the turret 7 by "L".
W is supplied to the microcomputer 21.

The microcomputer 21 has a timer function, and starts a motor rotation time limit timer in synchronization with the start of rotation of the turret 7 in the right direction. The microcomputer 21 receives the signal IN from the inverter 25 within a predetermined time limit, for example, 5 seconds from the start of counting by the motor rotation time limit timer.
If the TSW does not become "H", it is determined that the turret 7 is not rotating normally and the stepping motor 2
0 is stopped, and the buzzer 14
Warning sound.

Further, the microcomputer 21 may perform a display using an index bar for displaying the brightness on the monitor of the system as a warning sound generating means.

When the stepping motor 20 is operated with the basic clock CLK as a predetermined time limit for judging the abnormal rotation of the turret 7,
The time during which the turret 7 makes one or more rotations is set.

When the toggle switch 11 is turned on, the microcomputer 21 can determine that the turret 7 is at the predetermined initial rotation position.
The microcomputer 21 counts the pulses POT from the initial position, and controls the driving of the stepping motor 20 based on the operation signal and the count value CPOT.

The count value CPOT corresponds to the rotational position of the turret 7. The microcomputer 21 calculates the count value CPOT.
By comparing the rotational position of the turret 7 obtained from the above with the position of the filter 9 and the emergency light 8 arranged in the turret 7 in the circumferential direction of the turret 7, whether or not the filter 9 and the emergency light 8 are located at the normal position is determined. Judge. That is, the microcomputer 21 determines whether the emergency light 8 is located on the emission optical path L and is lit in an emergency, and determines whether the filter 9 is located on the emission optical path L. . For example, when each of the filters 9a and 9b is a normal filter or an optional filter, it is determined whether the selected filter is normally located on the emission optical path L according to a filter selection operation by the user.

When the microcomputer 21 determines that the filter 9 and the emergency light 8 are not properly positioned on the output optical path L, the positions of the filter 9 and the emergency light 8 on the front panel 1 are normal. Is displayed.

FIG. 8 shows the front panel 1. The front panel 1 is provided with a power switch 31 for turning on and off the power supply unit 13 and a socket 2 for mounting an endoscope. Various switches such as a main lamp lighting SW 32 are also provided. In addition, various display units are configured by LEDs and the like. For example, an optional filter display 33, a dimming level display 35, an emergency light state display 34, and the like are provided. The option filter display 33 shows the state of the option filter by illuminating the button 36 of the option filter switching SW.

By pressing the option filter switch SW button 36, the microcomputer 21 causes the filters 9a, 9b
The turret 7 is rotationally driven to switch the rotation.

Next, the operation of the embodiment configured as described above will be described.

Now, it is assumed that the user turns on the power of the light source device by the power switch 31. Then, after a set delay time, the microcomputer 21 starts operating. First, the microcomputer 21 controls the driving of the stepping motor 20 by open loop control.
The initial position of the turret 7 is detected. Then, when the initial position is detected, it is simultaneously detected whether or not the rotation of the turret 7 is normal.

That is, the microcomputer 21 performs predetermined initialization after turning on the power, and after ending the processing such as the restoration of the backup data, at step S 1, the rotation direction signal C
W is set to “L” (clockwise), and the basic clock CL
Set K to about 400 Hz. Further, the microcomputer 21 sets the output permission signal ENM to “L” indicating output permission.
Since the lever 11a of the toggle switch 11 is located at the neutral position unless an external force is applied, at this time, the output enable signal E from the driver enable circuit 22 is output.
NSW is "L" indicating output permission.

The basic clock CLK and the rotation direction signal CW from the microcomputer 21 are supplied to the motor driver 23. Accordingly, the motor driver 22 drives the stepping motor 20 clockwise at a constant speed. Further, the microcomputer 21 starts the motor rotation time limit timer in synchronization with the change of the output permission signal ENM from "H" to "L" in step S1 (step S2).
).

Next, the microcomputer 21 determines whether or not the time is within the time limit of the motor rotation time limit timer at step S3, and at step S6 the output INTSW of the inverter 25 is determined.
Is "H". When the turret 7 does not rotate, the positioning pin 11 is moved to the lever 11 of the toggle switch 11 within a time limit, for example, 5 seconds.
does not reach a. Then, the output I of the inverter 25 is
NTSW remains at “L” even after the time limit has elapsed. In this case, the microcomputer 21 determines that the turret 7 is not rotating normally, and sets the output permission signal ENM to “H”.
And the output of the motor driver 23 is stopped while maintaining the basic CLK at “H”. Further, the microcomputer 21 emits a warning sound with the buzzer 14 and displays that the turret 7 is not normally rotated to the set position by blinking a predetermined LED on the front panel 1 or the like. Note that an LED or the like may be provided on the front panel 1 to notify that rotation is not being performed normally.

The turret 7 rotates within 5 seconds of the count value of the motor rotation time limit timer, and the positioning pin 11 pushes the lever 11a of the toggle switch 11 to "right".
, The terminal SWINIT changes to “L”. Then, the driver enable circuit 22
The output of the AND circuit 28 becomes “H”, and the output permission signal E
NSW also becomes "H". As a result, the enable signal EN from the NOR circuit 24 becomes “L”, and the output of the motor driver 23 stops. Further, the microcomputer 21 also outputs the “H” permission signal ENM, and outputs the basic clock CLK.
Is stopped, and the motor rotation time limit timer is stopped.

Accordingly, the turret 7 is rotated by the lever 11a of the toggle switch 11 and the position of the positioning pin 11 on the turret 7 as indicated by the broken line in FIG.
That is, it stops at the initial position indicated by the dashed line in FIG.

Next, in step S8, the microcomputer 21 determines that the turret 7 is located at the initial position, and determines FILT which is the position data of the filter in the microcomputer.
Set ER to “0”. Thereafter, the microcomputer 21 determines the count value CPO of the pulse POT from the motor driver 23.
The rotation position of the turret 7 is obtained by obtaining the angle from the initial position by T.

Table 1 below shows that the basic clock CLK is 400
When the stepping motor 20 is driven by a half step (0.25 °) by setting the 1-2-phase excitation state by the excitation signal at 1 Hz, the position data (FILTER) of the filter, CPOT, and the angle from the initial position are determined. The relationship is shown for each selected filter and the like. In Table 1 below, the filter 9a is a normal filter,
The filter 9b is shown as an optional filter.

Table 1 FILTER CPOT Angle from initial position Initial position 0 0 0 ° Normal filter 1 2 4 ° Optional filter 2 68 136 ° Emergency light 3 113 226 ° The value of FILTER can be changed by operating button 36 on front panel 1. , "1" and "2". For example, before the light source lamp 5 is turned on, the operator operates the front panel 1.
When the button 36 is pressed (step S9), the microcomputer 21
Update the filter position data FILTER to “2”,
The option filter display 33 indicates to the operator that the option filter 9b has been selected (step S).
Ten). At this point, the microcomputer 21 does not rotate the turret 7.

Here, when the main lamp lighting SW 32 of the front panel 1 is pressed, the microcomputer 21 operates the power supply unit 1.
The light source lamp 5 is turned on by controlling 3. Next, the microcomputer 21 shifts the processing from step S11 to step S12, and determines whether or not FILTER is "0". When FILTER is “0” when the light source lamp 5 is turned on,
In step S13, the microcomputer 21 updates FILTER to "1" and proceeds to step S20 in FIG. 6 to start the rotation of the turret 7 so that the normal filter 9a is positioned on the emission optical path L.

On the other hand, if FILTER is not "0", the microcomputer 21 determines that the operator has performed the selection operation of the optional filter before the light source lamp 5 is turned on, and sets FILTER to "2" in step S14. Update to
Proceeding to step S30 in FIG.
The rotation of the turret 7 is started so that b is positioned on the emission optical path L.

Next, the respective rotating operations from the initial position to the filters 9a and 9b will be described.

First, the case where the center of the normal filter 9a is rotated from the initial position to the position on the emission optical path L will be described. The microcomputer 21 sets the basic clock CLK to 400H
z, the rotation direction signal CW is set to “H”, the output permission signal ENM is set to “L”, and the excitation signal is output in a 1-2 phase excitation state.
Then, the output ENS of the driver enable circuit 22 is output.
W becomes “L”, and the enable signal EN from the NOR circuit 24 becomes “H”. As a result, the motor driver 2
3 is in an output permission state, and the stepping motor 20
Perform half-step driving (0.25 °) (Step S
20). As a result, the turret 7 starts rotating counterclockwise from the initial position.

When the rotation starts, the motor driver 23
Is an integer multiple of the basic clock CLK (1-
The pulse POT having a period of 8 times by two-phase excitation)
Output to The microcomputer 21 counts the rising edge of the pulse POT. In this case, the pulse POT
1 pulse corresponds to a rotation angle of 2 °. That is, when the count value CPOT is “2”, the microcomputer 21 determines that the turret 7 has been rotated counterclockwise by 4 ° from the initial position.

As shown in Table 1, the center of the filter reaches the emission optical path L by rotating the filter by 4 ° from the initial position. FIG. 2 shows this state. When the count value CPOT becomes “2”, the microcomputer 21
It is determined that the center of the normal filter 9a is located on the emission optical path L, and the processing is performed from step S23 to step S24.
Then, the output permission signal ENM is set to "H" indicating prohibition, and the output of the motor driver 23 is stopped. Thus, the rotation of the turret 7 is stopped in a state where the center of the normal filter 9a is located on the emission optical path L (hereinafter, referred to as a normal filter 9a selected state).

The same processing is performed when the center of the optional filter 9b is rotated from the initial position to the output optical path L. In this case, when the count value CPOT becomes "68", the microcomputer 21 stops the output of the motor driver 23. As shown in Table 1, in a state where the center of the optional filter 9b is located on the emission optical path L (hereinafter, referred to as a selected state of the optional filter 9b),
The rotation of the turret 7 stops.

Further, the same processing is performed when the center of the emergency light 8 is rotated from the initial position to the output optical path L. In this case, the count value CPOT is "113".
, The microcomputer 21 stops the output of the motor driver 23. As shown in Table 1, the rotation of the turret 7 stops in a state where the center of the emergency light 8 is located on the emission optical path L.

By the way, it is conceivable that the operator operates the button 36 of the optional filter switching SW on the front panel 1 during the rotation operation of the turret 7. For example, when the turret 7 is rotating and moving from the normal filter 9a selection state to the option filter 9b selection state, the button 36 provided on the front panel 1 is pressed,
It is also assumed that the value of the internal FILTER is “2”. In this case, the microcomputer 21 determines in step S of FIG.
The process shifts from step 31 to step S32 to set FILTER to "1" and change the display on the front panel 1 to one indicating the normal filter state. And microcomputer 2
1 is a CP without rotating the turret 7 from the optional filter 9b selected state to the normal filter 9a selected state.
When the OT value reaches the target "113", the FIL
The value of TER is checked, and if FILTER is “2”, the stepping motor 20 is stopped.

That is, no matter how many times the button 36 is pressed during the rotational movement, the reverse rotation drive is not performed at that time, but the value of FILTER is checked once again when the movement is completed, and the FILTER value at that time is checked. Stepping motor 20 according to the value
Control. That is, when FILTER is “2”, the rotation of the stepping motor 20 is stopped, and
If TER is not “2”, option filter 9
The motor drive for rotating the turret 7 is performed from the b selection state to the normal filter 9a selection state.

As described above, in this embodiment, the stepping motor 2 is detected by detecting the initial position using the positioning pin 10 and the toggle switch 11.
0 open loop control is enabled. Even if the operator removes the filter 9 or rotates the turret 7 to an arbitrary position, the driving time limit timer is set in the initial position detection operation when the power is turned on. Even if the toggle switch 11 for detection is not operated, the fact can be reliably displayed on the front panel 1.
In addition, a warning sound can warn and display to the operator that an appropriate amount of light is not obtained.

When the rotation of the turret 7 is controlled from the selected state of each filter or the like installed on the turret 7 to the selected state of another filter or the like, during rotation, the operator separates from the target filter. Even if one of the filters is selected, once one movement is completed, the selection operation by the operator is compared again with the actual selection state again when the movement is completed, and only when there is a difference, the turret is switched to the next target filter or the like. 7
Is rotated. Therefore, the stepping motor 2
The microcomputer 21 that controls the drive of “0” sets a value of the basic clock CLK, the rotation direction signal CW, and the value of CPOT that is the current position information each time the filter is selected by the operator. It is not necessary to perform interrupt processing. Thus, accurate position control can be performed, and an appropriate amount of light can be incident on the endoscope at any time.

By the way, when the power is turned on, various methods can be considered as a method of checking the rotation operation of the turret 7. FIG. 9 is a flowchart for explaining another check method. In FIG. 9, the same steps as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 9, after operating the toggle switch for detecting the initial position when the power is turned on, the microcomputer 21
Sets the rotation direction signal CW to "H" and sets the rotation direction of the turret 7 to the counterclockwise rotation direction (step S40).
Then, the microcomputer 21 outputs the output permission signal ENM at “H” and the CLK at 400 Hz, and rotates the turret 7 counterclockwise at a certain set angle. For example, CPO
The rotation is performed until the value of T becomes “10” (40 °) (step S45). Further, by the processing after step S1, the rotation direction signal CW is set to "L" again, and the rotation is driven clockwise until the INTSW signal becomes "H".
If the value of CPOT is “10 ± 2” in step S47,
Judge that the position control of the turret 7 is functioning correctly,
If the value of CPOT is not “10 ± 2”, it is determined that the position control of the turret 7 is not accurate. In this case, the microcomputer 21 controls the front panel 1
Will warn you that it is not accurate. CPOT value "1"
“2” of 0 ± 2 ”is a value including an error of the back crash of the stepping motor 21 and an installation error of the toggle switch 11, and the like.

FIG. 10 shows an LED provided on the front panel 1 for notifying that it is not rotating normally.
FIG. 9 is an explanatory diagram for explaining a display using the same. FIG.
, The squares indicate the LEDs, and the solid colors indicate the lighting of the LEDs, and the hatched lines indicate the blinking of the LEDs.

FIGS. 10A and 10B show a normal operation state. FIG. 10A shows a normal operation state by lighting only the position of the 0 level, and FIG. 10B shows a state of lighting by lighting up to the 0 level.

When a warning is to be displayed, FIG.
The lighting display shown in (a) and (b) is changed to a blinking display (not shown). Thereby, a warning display is possible. Further, by associating each LED with the type of warning display and changing the LED to be turned on or flashed, the warning content can be distinguished. Also, decimal notation or 16
By giving a hexadecimal notation or the like, it is possible to easily determine the contents of the warning.

For example, FIG. 10C shows an LED of “8”.
Blinking indicates that the turret 7 is not rotating normally. FIG.
(D) blinks the third LED from the left to indicate that the temperature switch in the device is out.

[0072]

As described above, according to the present invention, the operation state of the filter and the lamp can be easily grasped by the operator.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a structure of a switching drive device employed in an embodiment of the present invention.

FIG. 2 is an explanatory view showing the structure of a drive device for switching between a filter and a lamp.

FIG. 3 is a block diagram showing an electrical configuration of a switching mechanism.

FIG. 4 is a circuit diagram showing a switching mechanism.

FIG. 5 is a flowchart showing an operation flow in circuit driving.

FIG. 6 is a flowchart showing an operation flow in circuit driving.

FIG. 7 is a flowchart showing an operation flow in circuit driving.

FIG. 8 is a plan view showing the appearance of the front panel.

FIG. 9 is a flowchart for explaining another method for checking the rotation operation of the turret.

FIG. 10 is an explanatory diagram for explaining a display on the front panel 1.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front panel, 5 ... Light source lamp, 7 ... Turret, 8 ... Emergency light, 9a, 9b ... Filter, 10 ... Positioning pin, 11 ... Toggle switch, 20 ... Stepping motor.

Claims (3)

[Claims] A stepping motor for detachably mounting an emergency light and at least one or more optical filters to drive a turret selectively disposed on an optical path of an illumination lamp; a positioning pin provided on the turret; A toggle switch provided on the locus of movement of the positioning pin, and a stepping motor driven each time power is turned on to detect that the positioning pin has operated the toggle switch, thereby confirming the position of the turret. Control means for performing an operation; a timer for measuring a time required for the positioning pin to operate the toggle switch during the position confirmation operation; and a time measured by the timer being a predetermined value or more than a set time. Presentation means for presenting the deviation to the operator. Source apparatus. 2. The light source device according to claim 1, wherein the presentation unit performs at least one of display and sound. 3. The light source device according to claim 1, wherein the presenting unit performs display using an index bar for displaying brightness on a monitor of the system.