JPH1099261A - Endoscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate initial setting, to easily begin inspection, and to improve operability for observation with an endoscope. SOLUTION: This endoscope device is composed of an endoscope 1 having a zoom lens 30 which is driven by an actuator 33 and a zoom control device 14 with the endoscope 1 which drives and controls the actuator 33. A movement control means is provided which drives and controls the actuator 33 so that the zoom lens 30 moves to a specified position according to a control of the power supply of the zoom control device 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus provided with an actuator for driving a driven body such as an objective optical system constituting a zoom lens.

[0002]

2. Description of the Related Art Piezoelectric actuators for driving a driven body such as an objective optical system constituting a zoom lens are disclosed, for example, in Japanese Patent Application Nos. 8-141754, 7-264886 and 7-264886.
No. 254267.

[0003] Japanese Patent Application No. 8-141754 discloses a laminated piezoelectric element in which a plurality of piezoelectric layers are laminated, and a detecting means provided in a part of the laminated piezoelectric element for detecting distortion or stress generated by the laminated piezoelectric element. When the piezoelectric actuator is driven by the detection means, the strain or stress generated by the laminated piezoelectric element is detected, and the detection signal is used to grasp that the end of the drive stroke has been reached, for example. Things.

Japanese Patent Laid-Open Publication No. Hei 7-264886 discloses a piezoelectric element connected to a moving body in at least one direction in a direction perpendicular to an axial direction of the piezoelectric element at a position included in the outer shape of the moving body. In addition, the size of the piezoelectric actuator is reduced and the durability against impact is improved.

Japanese Patent Application No. 7-254267 discloses a pulse generating means for continuously outputting a predetermined pulse wave according to an output signal waveform sent by a driving means for driving an actuator, and a counting means for counting the number of pulses. Comparing means for setting a predetermined limit value for the number of pulses and comparing the pulse number counted by the counting means with the limit value, and an output signal generated by the comparing means when the pulse number exceeds the limit value. And a power-supply stopping means for stopping a drive signal for driving the actuator in accordance with the level of the piezoelectric actuator and stopping the power supply, thereby improving the durability of the piezoelectric actuator against impact.

[0006]

When a driven body such as an objective optical system constituting a zoom lens of an endoscope is driven by using the above-described piezoelectric actuator,
At the time of initial setting of endoscopic observation, it is necessary to keep the WIDE state so that a wide-angle image can be seen when inserted into the body. For this reason, conventionally, after turning on the power of the magnifying endoscope system including the zoom control device, it is necessary to move the zoom lens to the WIDE end with the zoom switch and then insert the zoom lens. Was troublesome.

If the end of the treatment tool is not zoomed when the treatment tool is inserted, the treatment tool must be carefully inserted until the distal end of the treatment tool can be seen, which is inconvenient. Furthermore, at the time of magnifying observation of the endoscope, it is difficult to grasp the absolute size of the lesion by using the conventional zoom method without completely knowing how many times the current magnified image has been enlarged. . Also, it was difficult to reproduce an enlarged image of the observation section at the same magnification.
Further, it is necessary to keep pressing the switch until a predetermined magnification is reached.

The conventional speed adjusting means is TELE,
There is a problem that the adjustment on the WIDE side is not independent, and the speed in both directions changes, and the operation for adjusting to the desired zoom speed is complicated. For example, it was not possible to match the preference such as wanting to zoom slowly on the TELE side and fast on the WIDE side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to facilitate initial setting at the time of endoscopic observation, to immediately start an examination, and to improve operability. It is an object of the present invention to provide an endoscope device capable of performing the above.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an endoscope having a driven body driven by an actuator, and control for driving and controlling the actuator connected to the endoscope. And a movement control means for driving and controlling the actuator so as to move the driven body to a predetermined position in response to an operation of a power supply of the control device.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment, and FIG. 1 schematically shows a system of a magnifying electronic endoscope (hereinafter referred to as an endoscope) 1. The endoscope 1 includes an insertion section 2, an operation section 3, and a universal cord 4. A connector 5 for connecting to a light source device 25 described later is provided at the extending end of the universal cord 4. The insertion portion 2 of the endoscope 1 includes a distal end portion 6, a bending portion 7, and a flexible tube portion 8 sequentially arranged from the distal end side.

A zoom cable 9 extends from the connector 5, and a zoom connector 10 is provided at the end of the zoom cable 9. A connection cord 11 is connected to the zoom connector 10. When the connection cord 11 is not connected, the cap 10a is attached. The connection cord 11 is connected to the zoom connector 10 at one end.
A connector 12 is detachably connected to the
Another connector 13 is fixed to the other end. The connector 13 is detachably connected to a zoom control device 14 described later.

The speed control knob 1 is provided on the zoom control device 14.
5 are provided. Further, the zoom controller 14 is provided with a connection cord 17 to a foot switch 16 and a connection cord 19 to a seesaw type zoom remote controller switch 18 in a detachable manner.

Further, the connector 5 of the universal cord 4
Is a connector 2 provided at one end of the video cable 20.
1 is detachably connected. A connector 22 is provided at the other end of the video cable 20, and the connector 22 is connected to a camera control unit (hereinafter, referred to as a CCU) 2.
3 is detachably connected. The output image of the CCU 23 is displayed on the screen of the monitor 24 shown in FIG.

[0015] As shown in FIG.
The connector 5 is detachably connected to the light source device 25. The light source device 25 includes a lamp 26 for allowing illumination light to enter a light guide fiber 27 built in the endoscope 1.
And an air supply source (not shown) for supplying air to the air supply line and a water supply source for supplying water to the water supply line.

On the other hand, an objective lens system 28 and an image pickup device, more specifically, a solid-state image pickup device, more preferably a charge-coupled device (hereinafter referred to as CCD) 29 are built in the distal end portion 6 of the endoscope 1.
An image of a subject is taken.

A zoom lens 30 is provided in a part of the objective lens system 28. The zoom lens 30 differs from a general so-called zoom lens in that the focal point changes when the magnification is changed. That is, for example, the depth of field is 5 to 100 mm on the wide angle side, and the depth of field is 2 to 5 mm on the enlargement side.

The image signal of the CCD 29 is supplied to a preamplifier 3
1 is input to the signal processing circuit 32 in the CCU 23. Further, an actuator 33 for operating the zoom lens 30 is provided in the distal end portion 6 of the endoscope 1. The actuator 33 is driven by receiving a drive signal from a drive circuit 34 provided in the zoom control device 14.

The actuator 33 is composed of a piezoelectric actuator in detail, and moves the zoom lens 30 in the front-back direction of the optical axis via the connecting arm 35 by the actuator 33.

The actuator 33 is configured as shown in FIG. That is, the moving body 37 connected to the connecting arm 35 of the zoom lens 30 via the connecting member 36
One end is fixed to the moving body 37, and expands and contracts by applying a drive voltage having a predetermined waveform, and a piezoelectric element (electrostrictive element) serving as an impact force generator that applies an impact force to the moving body 37 by the expanding and contracting operation. Element 38). Moving body 37
Is frictionally engaged with and held by a base (stationary member) fixedly provided on the main body member of the distal end portion 6, specifically, an inner surface of the circular tube 39.

Here, the piezoelectric element 38 is formed by laminating ceramic piezoelectric members such as barium titanate, lead zirconate titanate, and porcelain, forming electrodes on them, and applying a DC current to the electrodes to form the piezoelectric members. This causes mechanical elongation deformation. The original piezoelectric element 38 is an element in which a distortion proportional to the electric field intensity is generated due to the reverse voltage effect, and the electrostrictive element is an element in which a distortion proportional to the square of the drive voltage is generated. It is called an element.

The moving body 37 is formed of a circular member in contact with the inner surface of the circular tube 39. The moving member 37 has a plurality of members which extend rearward at the outer peripheral portion of the member and elastically expand outward. (Beam part) 40 is provided in a protruding manner. Projecting portions 40a are provided at the extending ends of the beam portions 40 to press against the inner surface of the circular tube 39.

The operation unit 3 is provided with an actuator operation switch, more specifically, a seesaw type zoom switch 42. The output signal of the zoom switch 42 is input to a control circuit 43 provided in the zoom control device 14. The control circuit 43 instructs the drive circuit 34 on the type of drive waveform and the drive power of the actuator 33.

As shown in FIG. 2, the zoom switch 42 is of a seesaw type, and has an enlarged (T) switch portion 42a composed of one peak and a wide-angle (W) switch portion 42b composed of the other peak. Is provided. Then, by selectively operating each of the switch sections 42a and 42b, the actuator 33 moves the zoom lens 30 forward or backward in the optical axis direction accordingly, and the objective lens system 2
The zoom of 8 is performed. Moving body 37 of actuator 33
Moves back and forth in the optical axis direction of the objective lens system 28 integrally with the zoom lens 30 of the objective lens system 28.

The output signal of the foot switch 16 is input to the control circuit 43 via a photo coupler 44. Therefore, the foot switch 16 and the control circuit 43
The sides are electrically insulated.

The foot switch 16 has an enlarged (T) switch section 16a and a wide-angle (W) switch section 16b.
Is provided. The actuator 33 is driven by selectively operating each of the switch sections 16a and 16b, and moves the zoom lens 30 in the objective lens system 28 forward or backward in the optical axis direction according to the selected switch operation. The predetermined zoom is performed.

Similarly, the output signal of the remote control switch 18 is also input to the control circuit 43. The remote control switch 18 is also of a seesaw type, and includes an enlarged (T) switch portion 18a composed of one peak and a wide-angle (W) switch portion 18b composed of the other peak. The actuator 33 is driven by selectively operating each of the switch sections 18a and 18b, and the zoom lens 30 in the objective lens system 28 is moved forward or backward in the optical axis direction according to the selected switch operation. The predetermined zoom is performed.

As shown in FIG. 1, the remote control switch 18 is provided with an L-shaped hook portion 46. The hook portion 46 can be hooked on the flexible tube portion 8 of the endoscope 1 and can be used. The flexible tube 8 is slidable in the axial direction. The operator can simultaneously grasp the remote control switch 18 and the flexible tube portion 8 while selecting the device position of the remote control switch 18.

Manual zooming (that is, manual focusing) is possible by the switch means constituted by the switches 42, 16, and 18 described above. FIG. 4 is a circuit diagram showing a main part of the present embodiment. First, the configuration in the control circuit of the zoom control device 14 will be described. The main power switch 45 of the zoom control device 14 is connected to an input of the one-shot multivibrator 47 via a power-on signal generation unit 46a, and an output of the one-shot multivibrator 47 is connected to one input of an OR gate 48. I have.

On the other hand, the zoom switch (remote control switch 18, foot switch 16, operation unit switch 42)
Are connected to the switch signal generators 49a and 49b on the TELE side and the WIDE side, respectively, and one output of the WIDE switch signal generator 49b is connected to the other input of the OR gate 48. One of the outputs of the TELE switch signal generator 49a and the other of the outputs of the WIDE switch signal generator 49b and the output of the OR gate 48 are input to a three-input OR gate 50,
The output of the R gate 50 is connected to a control terminal of a relay 52 for controlling supply of the high voltage power supply + Vcc to the amplifier circuit 51 in the drive circuit 34.

On the other hand, the driving circuit 34 of the zoom control device 14
The basic configuration is that the outputs of the generators 53a and 53b of full-wave rectified waveforms in both forward and reverse directions are output from an analog switch 54.
a, 54b connected to the inputs of the analog switch 54
The outputs of a and 54b are connected to each other and then input to the amplifier circuit 51. The output of the amplifier circuit 51 is electrically connected to the actuator 33. Here, the output of the OR gate 48 is connected to the control terminal of the analog switch 54a, while the output of the TELE switch generation circuit 49a is directly connected to the control terminal of the analog switch 54b.

Therefore, first, when the main power supply 45 of the control device is turned on, a signal S1 that changes from the L level to the H level is generated from the power-on signal generation section 46 in synchronization with the power-on. The one-shot multivibrator 4 is triggered by a change from L to H level.
7, the single pulse signal S2 is generated.

Here, the duration T of this single pulse S2
Is set sufficiently longer than the required zoom time between the TELE end and the WIDE end. Since this single pulse S2 is input to one of the OR gates 48, the output of the OR gate 48 is directly affected by the state of the single pulse S2, and during the time T when the pulse S2 is at the H level, The relay 52 is controlled to be closed, and a full-wave rectified waveform (positive waveform) 53 a is input to the amplifier circuit 51.

The output of the OR gate 48 is also input to the three-input OR gate 50.
The output of the input OR gate 50 is also directly affected by the state of the single pulse S2. During the time T during which the pulse S2 is at the H level, the relay 52 is controlled so as to directly close the relay 52. Supplied. In this way, when the main switch 45 is turned on, the amplified full-wave rectified waveform (positive waveform) 53a is energized to the actuator 33, and the zoom lens 28 moves in the WIDE direction and hits the WIDE end.

As described above, after zooming to the WIDE end, by pressing "T" or "W" of the zoom switches 16, 18, and 42, the zoom switches 16, 1 are switched.
The state of each of the switch signal generators 49a and 49b becomes H level only during the time when the buttons 8 and 42 are pressed.

Therefore, only during this H level, full-wave rectified waveforms 53a and 53b, which are forward and reverse to the high-voltage power supply, are amplified.
, The desired zoom operation in both the TELE and WIDE directions becomes possible. Further, when the main power supply 45 is turned off, the zoom may be performed at the WIDE end.

As described above, when the power of the control device is turned on and the insertion and observation are to be started by the endoscope 1, it is necessary that the zoom is wide-angle (WIDE). Can be easily performed without operating the zoom switch, and the endoscope 1 can be safely inserted and observed.

In the first embodiment, the zoom lens 30 is connected to the zoom lens 30 via the connecting arm 35 by the actuator 33.
Is moved in the front-back direction of the optical axis, but the treatment instrument raising base may be driven by the actuator 33.
In this case, the treatment tool is located at an angle where the treatment instrument is not raised as a predetermined position, and is located at that angle according to the operation of the power supply.

Further, the view direction changing means, for example, a mirror may be driven by the actuator 33. In that case, the position is in a state of direct view as a predetermined position,
It will be in that position according to the operation of the power supply. As the viewing direction conversion, the image is converted into a state of oblique view or side view.

FIGS. 5 and 6 show a second embodiment,
FIG. 5A is a cross-sectional view of the distal end portion 6 of the endoscope 1, and FIG.
Denotes a distal end portion 6 of the endoscope 1. On the inner wall surface of the cylindrical channel 54 provided in parallel with the zoom mechanism as described in the first embodiment, near the channel outlet 55, the light emitting diodes 56a are arranged so that the light transmitting and receiving surfaces face each other. And a photodetector 56b. The light transmitting and receiving surfaces of the light emitting diode 56a and the photo detector 56b are flush with the inner wall surface of the channel 54.

As shown in FIG. 5B, an endoscope forceps insertion port 58 is provided.
, A treatment tool 57 such as a snare is inserted into the channel 54, and when the tip of the treatment tool 57 reaches the vicinity of the channel outlet 55 of the distal end portion 6, light emitted from the light emitting diode 56 a is treated. When reflection and scattering are detected by the photodetector 56b,
A detection signal S3 as shown in FIG.
By energizing the actuator 33 with a full-wave rectified wave (positive waveform) S4 that lasts for a time T from the rise of 3 and zooms in the WIDE direction, it hits the WIDE end. Here, as described in the first embodiment, the time T is set to be sufficiently longer than the required zoom time between the TELE end and the WIDE end. As the treatment tool detection means, in addition to the light emitting diode 56a and the photodetector 56b, an ultrasonic sensor, a tactile / force sensor that reacts by directly contacting the tip of the treatment tool, or the like may be used.

As described above, when the endoscopic procedure is to be started during observation with the endoscope 1, it is necessary that the zoom is wide-angle (WIDE). The operation can be easily performed without operating the switch, and an accurate and safe treatment can be performed.

FIGS. 7 and 8 show a third embodiment.
As shown in FIG. 7, three switch signal lines 59 are connected to and extend from the zoom switches 16, 18, and 42 at their respective contacts, and these switch signal lines 59 pass through the connector 13 and the zoom connector 10 halfway. Is connected to an input of a control circuit 43 in the zoom control device 14.
Further, two actuator energizing wires 60 are connected to both ends of the actuator 33, and these actuator energizing wires 60 are also connected to the connector 13 and the zoom connector 1 similarly.
0 through the drive circuit 34 in the zoom control device 14.
Connected to the output end of the

Further, the switch signal line 59 and the actuator energizing line 60 are separate from each other, and their ends are short-circuited.
The poor connection inspection line 61 is input to the poor connection detecting means 62 via the connector 13 and the zoom connector 10 in the middle. The output of the connection failure detection means 62 is
3 of the three output lines of the control circuit 43, two of the lines 70 and 71 are connected to the control input of the drive circuit 34 by one.
The line 72 is connected to the control input terminal of the alarm sounding section 63.

As shown in FIG. 8, the pin shape of each of the connectors 13 and 10 has two protruding portions 64 including a long zoom switch pin 65 and a short connection failure detecting pin 66. The switch signal line 59 and the actuator energizing line 60 are electrically connected to the switch pin 65, and the connection failure inspection line 61 is electrically connected to the short connection failure detection pin 66. The mating socket 67 is provided with contact portions 68 and 69 corresponding to the lengths of these two pins.

As described above, when there is a connection failure in each of the connectors 13 and 10, the connection failure detection pins 66 in the connectors 13 and 10 are completely exposed to the outside, and the connection failure inspection line 61 is disconnected. . On the other hand, the long zoom switch pin 65
Cannot be completely removed from the contact 68 in the socket, so that the zoom switch wire 59 and the actuator energizing wire 6
0 means that conduction is maintained. In this state, the output of the connection failure detecting means 52 becomes H level,
3, the actuator 3 via the output line 70
The power supply to 3 is stopped.

When the zoom switches 16, 18, and 42 are pressed when the disconnection is detected, the buzzer sounds by the alarm sounding section 63 through the output line 72 among the three output lines of the control circuit 43. . The output line 71 is for sending a control signal for energizing the actuator to the drive circuit 34 when the zoom switch is pressed when the connection is good.

Therefore, when the connector is not connected properly, the power is not supplied, and an alarm is sounded, so that the connection mistake of the connector can be prevented, and there is no danger of electric shock. In addition, since the internal circuit is cut off by attaching and detaching the connector part without turning off the power of the control device, the light source device and CC
The initial setting for endoscopic observation can be performed only by turning on and off the U power supply.

FIGS. 9 to 13 show a fourth embodiment. FIG. 9A is an external view of the zoom control device 14, and FIG. 9B and FIG.
(C) As shown in FIG.
(D) and (e), a four-step constant-magnification changeover push button switch 75 is provided. The cross section of each of the switches 73 to 74 is a membrane switch as shown in FIGS.
LED 77a, 77b is provided inside 6b. In addition, an actuator speed adjustment push button switch 78,
A T / W balance switch 79 for balancing the zoom speed on the TELE side and the WIDE side described in the fifth embodiment, and OVERLOA indicating a short-circuit of the actuator.
A D lamp 80, a triple lamp 81 indicating the energized state of each zoom switch, and the like are provided.

Next, FIG. 10 is a diagram showing the relationship between switches and zoom switches on the front panel 73 and display on the monitor screen.
Shown in As for each switch and zoom switch on the front panel 73, all switch signal lines are input to the microcomputer 82, the output of the microcomputer 82 is input to the character generator 83, and the output of the character generator 83 is input to the superimpose unit 84. The output is connected to the monitor 24.

Further, inside the distal end portion 6 of the endoscope 1,
A sensor for detecting the position of the zoom lens is provided near the zoom lens 28, and an output signal line of the sensor is connected to the microcomputer 82. The sensor may be an optical sensor such as a photo interrupter, an ultrasonic sensor, or the like (not shown).

The operation of the present embodiment will be described with reference to FIGS. FIGS. 11 and 12 are flowcharts showing the relationship between the operation of each panel switch and zoom switch and the screen display state. First, when the main power supply 45 of the zoom control device 14 is turned on, as described in the first embodiment,
When the zoom position hits the WIDE end, the LED 85 of the four-step fixed-magnification changeover push button switch 75 on the panel 73
"W" lights up among the LEDs 77a and 77b of the mode changeover switch 74 at the same time as "W" is lit up.
T "is turned on, and the zoom control device 14 is set to the normal mode in which observation can be performed at an arbitrary magnification.

When the user wishes to perform constant magnification observation, when the "SKIP" button 76b of the mode changeover switch 74 is pressed, the internal LED 77b is turned on, and the display on the monitor 24 becomes an A pattern. The character “WIDE” lights up brighter than the other characters. Here, when any one of the four-step constant-magnification switching push button switches 85a to 85d is pressed, a pulse having a length corresponding to the pressed magnification is supplied to the actuator, and the monitor image is set to the set magnification. Zoomed.

Also, the LED of the magnification at which the four-step constant magnification switching push button switch 75 is pressed is turned on, and the monitor screen of the A pattern shines brighter at the pressed magnification than at other parts. In addition, remote control switch 18, foot switch 1
6. The magnification can also be changed stepwise by pressing the TELE / WIDE switch of the operation unit switch 42. When the TELE switch is pressed once, zooming can be performed to the next magnification on the TELE side. Conversely, when the WIDE switch is pressed, zooming can be performed to the next magnification on the WIDE side. The lighting of the LED 86 of the four-step constant-magnification switching push-button switch 75 and the display of the magnification on the monitor also change accordingly.

On the other hand, when normal magnification observation is desired at an arbitrary magnification instead of constant magnification observation, the mode changeover switch 74 is used.
Press the "CONT" button 76a of the
77a lights up, the display on the monitor becomes a B pattern, and the zoom is performed to a desired magnification. Zoom state is W
When at the IDE end / TELE end, the characters "WIDE" / "TELE" on the monitor light up brighter than other characters, respectively. When the zoom state is between the WIDE end and the TELE end, The bright lighting disappears.

In this embodiment, furthermore, by providing the abutment detecting section 87 in the control circuit 43, it is possible to reliably detect that the position of the zoom lens 28 is at the WIDE end / TELE end. FIG. 13 shows a circuit of the hit detection unit. Here, the current flowing through the actuator 33 is
Although it is detected that it grows in the hit state,
Specifically, the current flowing through the actuator 33 is detected by a photocoupler 89 connected in parallel to the current detection resistor R4 of the drive circuit 34, and the threshold value is slightly lower than the voltage value corresponding to the non-butting current. The comparator 90 compares the value voltage S5 with the photocoupler output voltage S6.

When the zoom lens 28 collides, the output voltage S6 of the photocoupler becomes lower than the threshold voltage S5. Therefore, the colliding can be detected by changing the output of the comparator 90 to the "L" level. other than this,
The butting can also be detected by a change in the resonance frequency of the actuator 33 or the like.

When the sensor for detecting the position of the zoom lens 28 detects the lens position, the detection signal and
Each pulse voltage for zooming in the WIDE direction and the TELE direction until the difference between the two signal levels converges within a predetermined value is compared with a position signal corresponding to the magnification set by the magnification setting means. To the actuator 3
Keep adding to 3. This enables observation at a more accurate magnification.

According to the present embodiment, the zoom can be made to a certain fixed magnification at the time of magnifying observation of a small lesion, so that there is an effect that the size of the lesion can be easily grasped. When the abutting detection is performed, the microcomputer does not recognize the TELE end / WIDE end until the zoom lens 28 is securely abutted, so that the energization to the actuator 33 is continued.
The letters "TELE" or "WIDE" on the monitor do not light up brightly. If the zoom lens 33 actually hits the TELE end / WIDE end while this energization is being performed, and the abutment is detected, the energization is stopped and the letters "TELE" or "WIDE" on the monitor are displayed. Lights brightly. As a result, the position of the zoom lens 28 becomes T
It can be reliably detected at the EE end / WIDE end.

If there is no collision detection, a predetermined number of pulses are supplied and "TELE" or "WID" is applied.
The letter "E" is lit, but in this case, the actual lens position may not be in contact with the TELE end / WIDE end, and the usability is poor.

FIG. 14 shows a fifth embodiment. As shown in FIG. 14A, the T / W balance switch 79 in the fourth embodiment has an up / down push button 91.
a, 91b during which LED 9 lights up in several stages
2 are provided. The T / W balance switch 79
Is input to the voltage generation circuit 93 in the control circuit 43 inside the housing of the zoom control device 14, and the output S7 is input to the comparator 95 together with the output S8 of the separately provided triangular wave generation circuit 94, and the output S9 is input to the control terminals of the analog switches 54a and 54b. FIG. 7B shows the inside of the voltage generation circuit 93, and the variable terminal 9 is shown.
6 is directly connected to a + 5V power supply. Both ends of a variable resistor 97 are connected to an input of a multiplexer 98, and a control switch of the multiplexer has a T / W switch signal S
12 has been entered. The output S7 of the multiplexer is
Connected to a resistor R11 connected in series to a -5V power supply.

According to the present embodiment, when the upper button 91a of the upper / lower push buttons 91a and 91b of the T / W balance switch 79 is pressed, the variable terminal 96 moves upward in the figure. Also, the zoom switches 16, 18, 42
Is pressed, the T / W switch signal S12 causes the multiplexer to operate to conduct S10 and S7, thereby raising the potential of the signal S7 to 0V or more.

When this output signal S7 is input to the comparator, the signal S7 is compared with the triangular wave S8 having the waveform shown in the upper part of FIG. 9C, and the lower signal S9 becomes a square wave. The DUTY ratio becomes lower as the upper button 91a is pressed and the LED 92 lights up to the upper stage. Since the output S9 is input to the control terminal of the analog switch 54a, the actuator 33 in the WIDE direction is
Since the duty ratio of the pulse that energizes the
The zoom speed in the E direction decreases.

Conversely, T of the zoom switches 16, 18, and 42
When ELE is pressed, the T / W switch signal S12 causes the multiplexer to operate to conduct S11 and S7, thereby lowering the potential of the signal S7 to 0V or less.
Therefore, when this output signal S7 is input to the comparator 95, the signal S9 is always a "H" level signal, and TE
The zoom speed in the LE direction remains at the maximum value.

On the other hand, the T / W balance switch 79
Of the lower push buttons 91a and 91b, the lower button 91
When b is pressed, the variable mizu 96 moves downward, and the zoom operation in the TELE direction is reduced by the circuit operation reverse to the above operation, and the zoom speed in the WIDE direction remains unchanged at the maximum value.

As a result, when the display of the LED 92 is located exactly in the middle, the zoom speed becomes maximum in both the TELE and WIDE directions. However, as the display of the LED 92 goes upward, only the speed in the WIDE direction decreases. As the display goes downward, only the speed in the TELE direction decreases. Therefore, the balance of the zoom speed on the TELE / WIDE side can be adjusted.

Therefore, enlargement and wide-angle operation can be observed at desired speeds according to the observation site. According to the above-described embodiment, the following configuration is obtained.

(Supplementary Note 1) An endoscope apparatus comprising: an endoscope having a driven body driven by an actuator; and a control device connected to the endoscope and drivingly controlling the actuator. An endoscope apparatus comprising: movement control means for driving and controlling the actuator so as to move the driven body to a predetermined position in response to an operation of the power supply.

(Supplementary Note 2) The endoscope apparatus according to supplementary note 1, wherein the driven body is at least one lens of an objective optical system forming a zoom lens. (Supplementary Note 3) The endoscope apparatus according to supplementary note 1, wherein the predetermined position is a wide end. (Supplementary Note 4) The endoscope apparatus according to supplementary note 1, wherein the movement control unit controls the actuator in accordance with a power-on operation of the control device.

(Supplementary note 5) The endoscope apparatus according to supplementary note 1, wherein the movement control means controls the actuator in accordance with a power-off operation of the control device. (Supplementary Note 6) The endoscope apparatus according to supplementary note 1, wherein the driven body moves between predetermined movable ranges.

(Supplementary Note 7) In the supplementary note 1, the movement control means drives and controls the actuator longer than a required time when the driven body moves the full length of the movable range, and moves the driven body to a predetermined position. An endoscope apparatus, wherein the endoscope apparatus is moved.

(Supplementary Note 8) In Supplementary Note 1, the movement control means may include a power-on signal generating unit for generating a signal in response to power-on of the control device, and a signal for a predetermined time based on the power-on signal generating unit. And a drive pulse generating circuit for supplying a drive pulse to the actuator based on the signal holding circuit.

(Supplementary Note 9) In the supplementary note 8, the movement control means may further include a switch signal generating unit for generating a signal based on an operation switch for controlling the driven body, the signal holding circuit and the switch. An endoscope apparatus comprising: a selection circuit to which an output of a signal generation unit is input, and supplying a drive pulse to the actuator based on a signal output through the selection circuit.

(Supplementary Note 10) In the supplementary note 9, the output signal of the signal holding circuit is input to the driving pulse generating circuit prior to the output signal of the switch signal generating unit. .

(Supplementary Note 11) The endoscope apparatus according to supplementary note 1, wherein the endoscope is detachable from the control device. (Supplementary Note 12) In Supplementary Note 11, the control device includes a connection failure detection unit that detects a connection failure of the endoscope,
An endoscope apparatus wherein the drive of the actuator is prohibited when the connection of the endoscope is poor.

(Supplementary Note 13) In Supplementary note 12, further,
An endoscope apparatus comprising: a notifying unit that notifies a connection failure based on a connection failure detection unit when controlling the actuator. (Supplementary Note 14) The endoscope apparatus according to supplementary note 6, further comprising a driven body position detecting unit configured to detect that the driven body is located at a start end and an end of a movable range.

(Supplementary Note 15) The endoscope apparatus according to supplementary note 14, wherein the driven body position detecting means detects a change in a current flowing through the actuator. (Supplementary note 16) The endoscope apparatus according to supplementary note 14, wherein the driven body position detecting means detects a change in a resonance frequency of the actuator.

(Supplementary Note 17) The endoscope apparatus according to supplementary note 1, wherein the driven body is a treatment instrument raising stand. (Supplementary note 18) The endoscope apparatus according to supplementary note 17, wherein the predetermined position is a position at which the treatment instrument raising table is at an angle at which the treatment instrument is not raised.

(Supplementary Note 19) The endoscope apparatus according to supplementary note 1, wherein the driven body is an observation visual field direction conversion unit. (Supplementary note 20) The endoscope apparatus according to supplementary note 19, wherein the predetermined position is a position where the observation visual field direction conversion unit faces a direct viewing state.

(Supplementary note 21) An endoscope apparatus comprising: an endoscope having a driven body driven by an actuator; and a control device that connects the endoscope and controls the drive of the actuator. Is an endoscope apparatus having means for setting a predetermined magnification.

(Supplementary Note 22) The endoscope apparatus according to supplementary note 21, wherein the control device has a switching unit for switching between a normal observation mode and a fixed magnification observation mode. (Supplementary note 23) The endoscope apparatus according to supplementary note 21, wherein the control device includes a monitor, and the control device includes a display unit that displays a set magnification.

(Supplementary note 24) The endoscope apparatus according to supplementary note 23, wherein at least a part of the display means is displayed in an emphasized manner. (Supplementary Note 25) In an endoscope apparatus including an endoscope having a driven body driven by an actuator, and a control device that connects the endoscope and controls driving of the actuator, the driven body includes: First moving speed setting means for controlling the movement of the driven body in one direction and setting the moving speed; and second moving speed for controlling the movement of the driven body in the other direction and setting the moving speed. An endoscope apparatus controlled by setting means.

(Supplementary Note 26) An endoscope apparatus including an endoscope having a driven body driven by an actuator and a treatment instrument insertion channel, and a control device that connects the endoscope and controls the drive of the actuator. , A treatment tool detecting means for detecting insertion of a treatment tool into the treatment tool insertion channel, and movement control for driving and controlling the actuator to move the driven body to a predetermined position based on the treatment tool detection means And an endoscope apparatus.

(Supplementary note 27) The endoscope apparatus according to supplementary note 26, wherein the treatment instrument detection means is provided on a distal end exit side of the treatment instrument insertion channel. (Supplementary note 28) The endoscope apparatus according to supplementary note 26, wherein the driven body is at least one lens of an objective optical system forming a zoom lens. (Supplementary note 29) The endoscope apparatus according to supplementary note 28, wherein the predetermined position is a wide end.

[0085]

As described above, according to the present invention, there is provided an endoscope having a driven body driven by an actuator, and a control device for driving and controlling the actuator, and operating a power supply of the control device. By providing movement control means for driving and controlling the actuator so as to move the driven body to a predetermined position in accordance with the above, initial setting at the time of endoscopic observation can be facilitated, and the examination can be started immediately. And the operability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an enlarged electronic endoscope system according to a first embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the embodiment.

FIG. 3 is a partial cross-sectional view of a piezoelectric actuator that drives the objective optical system of the embodiment.

FIG. 4A is an electric circuit diagram of a main part of the embodiment,
(B) is a timing chart.

5A and 5B show a second embodiment of the present invention, in which FIG. 5A is a longitudinal sectional side view of a distal end portion of an endoscope, and FIG. 5B is a perspective view of an insertion portion of the endoscope.

FIG. 6 is a timing chart of the embodiment.

FIG. 7 is an electric circuit diagram according to a third embodiment of the present invention.

FIG. 8 is a side view of the connector of the embodiment with a part cut away.

9A and 9B show a fourth embodiment of the present invention, wherein FIG. 9A is a perspective view of a zoom control device, FIG. 9B is a front view of a mode switching push button switch, and FIG. 9C is a cross section of the mode switching push button switch. FIG. 3D is a front view of a four-step constant-magnification switching push-button switch, and FIG.

FIG. 10 is a configuration diagram of the embodiment.

FIG. 11 is a flowchart of the embodiment.

FIG. 12 is a flowchart of the embodiment.

FIG. 13 is an electric circuit diagram of the embodiment.

FIG. 14 shows a fifth embodiment of the present invention, in which (a) is a front view and a control circuit diagram of a T / W balance switch,
(B) is a voltage generation circuit diagram, (c) is a timing chart.

[Description of Signs] 1 ... Endoscope 14 ... Zoom control device 30 ... Zoom lens (driven body) 33 ... Actuator

Claims (1)

[Claims] 1. An endoscope apparatus comprising: an endoscope having a driven body driven by an actuator; and a control device connected to the endoscope and drivingly controlling the actuator. An endoscope apparatus comprising: movement control means for driving and controlling the actuator so as to move the driven body to a predetermined position in response to the operation of (1).