JPH02286141A - Ultrasonic diagnostic device - Google Patents

Abstract

PURPOSE:To reduce the diameter of an inserting part and to miniaturize an ultrasonic diagnostic device by providing electrodes on a facing rotor and stator and providing an electrostatic motor, which impresses a voltage to these electrodes and moves the rotor, in the tip part of the inserting part. CONSTITUTION:An electrostatic motor 10 is composed of a stator 8 fixed to the tip part of an inserting part 4, and rotor 9 facing to this stator 8. In the stator 8, plural electrodes 8 are provided and these electrodes are formed by aluminium, etc., between first and second insulating layers 8b and 8c. In the rotor 9, plural electrodes 9d are provided between first and second insulating layers 8b and 9c. When the voltage is impressed between electrodes C and (c) in a state the electrode B of the stator 8 is correspondent to an electrode (b) of the rotor 9, the electrodes C and (c) are mutually attracted and the rotor 9 is moved to a side where the electrode B is arranged. This operation is successively repeated and the rotor 9 is moved in the axial direction of the inserting part 4. With this movement of the rotor 9, an ultrasonic vibrator 12 fixed to the rotor 9 is moved and the echo having a different cross section is received by the ultrasonic vibrator 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an ultrasonic diagnostic apparatus that achieves miniaturization of the apparatus and a reduced diameter of an insertion section having an ultrasonic transmitter/receiver section.

E. Prior Art and Problems to be Solved by the Invention] In recent years, ultrasound diagnostic devices have been developed that insert an ultrasound transducer that generates and transmits and receives ultrasound beams into a body cavity, and obtain tomographic images of the inside of the body from within the body cavity. is widely used.

This ultrasonic diagnostic apparatus not only allows dynamic observation but also has the advantage of having almost no effect on living organisms; however, it is difficult to detect lesions using tomographic images. Therefore, a technique is known in which scanning is performed by manually moving the insertion section that has the ultrasonic transmitting and receiving section, but moving the insertion section is often painful for the patient, and Positioning is difficult when moving,
There is a possibility that the affected area may be overlooked.

Therefore, for example, in Japanese Patent Application Laid-open No. 57-9439, the proximal end of the insertion section is connected to a drive section having a motor, a speed reduction device, etc., and a shift V-shift that is moved by the drive section is inserted. A technique has been disclosed in which the ultrasonic transducer is inserted into a shaft and the ultrasonic transducer is provided at the tip of the shaft to form a scanning section. Then, scanning can be performed by inserting the insertion section into a body cavity and moving the scanning section within the insertion section by a driving section located outside the body cavity. Further, by configuring the insertion portion and the shaft to be flexible, it is possible to insert the insertion portion into a bent body cavity.

However, according to this prior art, since the driving section and the ultrasonic transducer are separated from each other, it is difficult to improve the followability of the ultrasonic transducer.

Furthermore, it is difficult to miniaturize the drive section, and the entire device tends to become large.

In particular, if the shaft inserted into the insertion section is flexible, the followability may further deteriorate, and this shaft must be formed to a diameter of a certain value or more, and the insertion section may have a small diameter. It is difficult to convert into

[Object of the Invention] The present invention has been made in view of these circumstances, and it improves the followability of an ultrasonic transducer even when the insertion section is rigid as well as flexible, and It is an object of the present invention to provide an ultrasonic diagnostic device that allows the diameter of the insertion portion to be reduced and further downsizes the device.

[Means and Effects for Solving the Problems 1] The ultrasonic diagnostic apparatus according to the present invention includes an electrostatic motor that moves the rotor by providing electrodes on the opposing rotor and stator and applying voltage to the electrodes. It is provided at the distal end of the insertion section inserted into the specimen, and is connected to the ultrasonic scanning section built inside the distal end, and the ultrasonic scanning section is moved by an electrostatic motor.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 5 relate to the first embodiment of the present invention, FIG. 1 is a side view of the ultrasonic scanning section, FIG. 2 is an explanatory diagram of the operating state of the ultrasonic scanning section, and FIG. 3 is a static An explanatory diagram of the electric motor, Figure 4 is 1
The block diagram of the 11111 system, FIG. 5, is a schematic configuration diagram of the endoscope apparatus.

In these figures, numeral 1 is an ultrasonic endoscope, 2 is an optical III device equipped with a power source for driving a motor, and 3 is an ultrasonic image observation device equipped with a monitor 3a.

The endoscope 1 has a flexible insertion section 4 that can be inserted into a body cavity, and a large-diameter operation section 5 connected to the proximal end of the insertion section 4. There is.

An eyepiece section 5a is provided on the base end side of the operating section 5, and a universal cord 6 is extended from one side of the scanning section 5. A connector device 6a is provided at the tip of the universal cord 5, and the universal cord 6 is connected to the light source device 2 via the connector device 6a.

The illumination light supplied by the light source device 5 is transmitted to the insertion section 4, and is irradiated from the distal end of the insertion section 4 to the region to be observed, and an image of the region to be observed. is transmitted to the eyepiece 5a, and can be observed through the eyepiece 5a.

Further, a balloon 7 that can be expanded in a direction 1 perpendicular to the axis of the insertion section 4 is provided at the distal end of the insertion section 4 . The balloon 7 is configured to be filled with the sound medium, and the region at the tip of the insertion portion 4 where the sound medium is filled is driven by the motor drive power supply in the light source device 2. An electrostatic motor 10 is installed inside.

As shown in FIG. 1, this electrostatic motor 10 is comprised of a stator 8 fixed to the distal end of the insertion section 4 and a rotor 9 facing the stator 8.

The stator 8 includes, for example, a first insulating layer 8b formed of silicon dioxide, silicon nitride, etc. on a silicon semiconductor substrate 8a.
A second insulating Ffii 8c is provided on the second insulating layer Ffii 8c, and a plurality of electrodes 8d made of aluminum or the like are provided between the first and second insulating layers 8b and 8C. On the other hand, the rotor 9 has a second insulating layer 9C under the first insulating layer 9b.
are fixed, and these first and second insulating layers 9'b, 9c
A plurality of electrodes 9d are provided between them. Stator 8 above
The second insulation 1i! The lower surface of the second insulating layer 9b of the rotor 9 is movably attached to the upper surface of the rotor 8b. Also,
This surface in sliding contact is polished or coated with a lubricant to reduce frictional resistance.

The pitch of the electrodes 8d provided on the stator 8 is
The pitch is set shorter than the pitch of the electric current ff19d provided on the rotor 9. Therefore, as shown in FIG. 3(a), when a voltage is applied between the electrodes C and c with the electrodes B of the stator 8 and the electrodes of the rotor 9 corresponding to each other, the third
As shown in Figure (b), these electrodes C and C are attracted to each other, and the rotor 9 is moved to the side where the electrode B is disposed. By sequentially repeating this action, the rotor 9 is moved left and right with respect to the stator 8, that is, in the axial direction of the insertion portion 4, as shown by arrows in FIG.

Further, an ultrasonic scanning section 13 composed of an ultrasonic transducer 12 is fixed on the opposite side of the rotor 9 from the stator 8, and when the stator 8 is moved, the ultrasonic scanning section 13 is fixed to the side opposite to the stator 8. The sonic transducer 12 is moved to perform scanning.

The ultrasonic transducer 12 is connected to the ultrasonic measuring device 3 via a cable 14. That is, the proximal end of the cable 14 is extended into the universal cord 6, and is connected via another universal cord 16 branched from the distal end of the universal cord 6 and a connector device 16a fixed to the distal end of the universal cord 16. The ultrasonic image observation device 3 is configured to be connected to the ultrasonic image observation device 3.

As shown in FIG. 4, a transmission/reception switching circuit 17 is provided within the ultrasonic image observation apparatus 3 and is configured to be connected to one end of the cable 14.

The transmission/reception switching circuit 17 also includes a pulser circuit 18 that generates a transmission pulse and an amplifier circuit 19 that amplifies the reception signal.
The output of this amplifier circuit 19 is connected to the DSC
(Digital scan converter) 20 to output to the monitor 3a.

When observing a lesion in an embodiment having such a configuration, the universal cord 6 is connected to the light source device 2 via the connector device 6a, and the universal cord 16 is connected via the other connector device 16a. Connect to the ultrasonic image observation device 3.

Next, the insertion section 4 is inserted into the body cavity, the region to be observed is illuminated with the illumination light supplied by the light source device 2, and the image of the region to be observed is observed through the eyepiece 5a.

Furthermore, when observing the deep parts of a living body using ultrasound as necessary, an acoustic medium is fed to the balloon 7 provided at the distal end of the insertion section 4 to inflate the balloon 7. The balloon 7 is brought into contact with the wall of the body cavity.

In this state, the balner circuit 18 in the ultrasonic image observation device 3
A transmission pulse is generated at the ultrasonic transducer 12, and the transmission pulse is sent to the ultrasonic transducer 12 via the cable 14. Then, ultrasonic pulses are emitted from this ultrasonic transducer 12 into the living body via the sound vIts body. The echo caused by this ultrasonic pulse is received by the ultrasonic transducer 12, and is amplified by the amplifier circuit 19 via the cable 14 and the transmission/reception switching circuit 17, and this amplified signal is output to the DSC 20. The signal of the designated cross section is stored in the DSC 20.

Further, a voltage is applied to appropriate electrodes 8d and 9d of the electrostatic motor 10 by the motor drive power supply built into the light source device 2, and the rotor 9 of the electrostatic motor 10 is moved. Then, as the rotor 9 moves, the ultrasonic transducer 12 fixed to the rotor 9 is moved. As a result, echoes with cross sections different from those described above are sequentially received by the ultrasonic transducer 12, amplified by the amplifier circuit 19, input to the DSC 20, and stored in the DSC 20.

These signals are processed by the DSC 20 and output to the monitor 3a, thereby displaying an ultrasound image on the monitor 3a.

Since the moving range of the rotor 9 is defined by the length of the stator 8, the lesion may not be found in the image displayed on the monitor 3a. In such a case, the insertion section 4 is moved to scan another region.

Then, the cross section of the region where the distal end of the insertion section 4 is located is scanned again, and the echoes of this region are transmitted to the ultrasound transducer 1.
2 and output to the monitor 3a, an image of a new region is displayed on the monitor 3a. Thus,
When the ultrasound image of the required area is output to the monitor 3a,
This image allows the surgeon to observe the lesion.

In addition, in this embodiment, since the ultrasonic transducer 12 as an example of the ultrasonic scanning section 13 is fixed to the rotor 9 of the electrostatic motor 10, the insertion section 4 can be further miniaturized. There is.

In addition, since this ultrasonic scanning section 13 is disposed at the distal end of the insertion section 4 of the endoscope 1, it is possible to perform observation with the naked eye and observation using ultrasound at the same time. This has the effect that it is possible to easily move the body cavity 13 within the body cavity.

Incidentally, this embodiment can also be applied to a technique as shown in FIG.

In this technology, a starter 8 of an electrostatic motor 10 is formed longer than a rotor 9, and is fixed with an adhesive 22 to the tip of an insertion section 4 surrounded by a light-transmitting member. At the same time, the stator 8 and rotor 9 are slidably engaged via a rail-like member (not shown), and the rotor 9 is at P! The rotor 9 is prevented from coming off from the stator 8 during the initial operation.

Further, a light emitting element 23a and a light receiving element 23b are provided on the surface of the rotor 9 opposite to the stator 8, and the light emitted from the light emitting element 23a is reflected by the living body and received by the light receiving element 23b. This makes it possible to perform spectroscopic analysis of the living body.

By applying the present invention to such technology, it is possible to reduce the size of devices that perform various inspections and to reduce the diameter of the insertion section. Further, in this technology, the light emitting element 23a,
Although the example in which the light receiving element 23b is connected to the rotor 9 has been described,
The rotor 9 can be configured to be connected with a sensor using a laser or a sensor that detects capacitance, for example, so as to observe not only the inside of the body cavity of the living body but also the inside of the lumen.

6 and 7 relate to a second embodiment of the present invention, FIG. 6 is a side view of the ultrasonic scanning section, and FIG. 7 is an explanatory diagram of the operating state of the ultrasonic scanning section. Incidentally, the same members and members having the same functions as those in the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, the ultrasonic vibrator 12 is fixed to the outer periphery of a rotatably arranged drum 24 via a shaft 24a, and the drum 22 is connected to the rotor of an electrostatic motor 10 via a rod 24b. It is connected to 9. and,
The drum 22. The rod 22b and the like constitute an ultrasonic scanning section 13, and this ultrasonic scanning section 13 is constituted by a slider crank mechanism.

With such a configuration, when the rotor 9 moves relative to the stator 8, this movement is transferred to the drum 2 via the rod 22b.
2, and the drum 22 is rotated. Then, the ultrasonic transducer 12 is swung about the shaft 22a, thereby performing sector scanning by the ultrasonic transducer 12.

FIG. 8 to FIG. 11 relate to the third embodiment of the present invention;
The figure is a side view of the ultrasonic scanning section, FIG. 9 is an explanatory diagram of the operating state of the ultrasonic scanning section, FIG.
FIG. 1 is an explanatory diagram of the Wp Lumi motor.

In this embodiment, the ultrasonic scanning unit 13 includes a shaft 25 and an ultrasonic transducer 12 fixed to the tip of the shaft 25.
An electrostatic motor 110 for linear drive and an electrostatic motor 210 for radial drive are connected to the base end side of the shaft 25. A rotor 109 of a linear drive electrostatic motor 110 is fixed approximately at the center of the shaft 1/ft 25, and the rotor 109 is surrounded by a stator 108 formed in a cylindrical shape. A rotor 209 of a radial drive electrostatic motor 210 is fixed to the end of the ultrasonic transducer 25 opposite to the ultrasonic vibrator 12, and this rotor 209 is also surrounded by a stator 208 formed in a cylindrical shape.

The rotor 109 of the linear drive electrostatic motor 110 has an electrode 10 formed in a circumferential manner around the shaft 25.
9d are provided in the axial direction of the shaft 25, while the stator 10 of this linear drive electrostatic motor 110
The electrode 108d is arranged on the inner periphery of the cylindrical substrate 108a.
A plurality of electrodes 109d corresponding to the above are provided. Also,
These electrodes 108d and 109d have an insulating layer of 1.08G,
109C and the insulation 11108
A gap is formed between 0.1090 and 0.1090.

On the other hand, 0-2 of the radial drive electrostatic motor 210
09, a plurality of electrodes 209d extending in the axial direction of the shaft 25 are provided around the sill 1 shaft 25,
Further, the cylindrical substrate 208a of the stator 208 is provided with a plurality of electrodes 208 dB corresponding to the electrodes 209d. Incidentally, the insulation M2O8c of the stator 208 and the insulation layer 209C of the rotor 209 are in contact with each other so as to be freely movable.

Stator 209 of this radial drive electrostatic motor 210
The bits of the electrodes 208d provided on the rotor 20
The pitch of the electrodes 209d is set shorter than the pitch of the electrodes 209d of No.9.

Therefore, these electrodes 208d are similar to the explanation in the first embodiment above.

The rotor 209 is rotated relative to the stator 208 by applying a voltage to appropriate parts of the rotor 209d.

That is, as shown in FIG. 11(a), when a voltage is applied to the electrode H and the electrode 209d while the electrode 209d of the rotor 209 corresponds to the electrode of the stator 208 and is applied to the electrode H, these When the electrode H and the electrode 209d are attracted to each other, the electrode H is rotated in the direction of the electrode H as shown by the arrow in FIG. 11(b). This action causes the plurality of electrodes 20 provided on the stator 208 to
8d and the electrode 209d of the rotor 209, the rotor 209 is rotated relative to the stator 208.

In the embodiment with such a configuration, a voltage is applied to appropriate electrodes 108d and 109d of the linear drive electrostatic motor 110 to cause the shaft 25 to slide and move the ultrasonic transducer 12 in the linear direction. By applying a voltage to appropriate electric currents ff1208d and 209d of the driving electrostatic motor 210 to rotate the shaft 25 and the ultrasonic vibrator 12, and performing scanning by the ultrasonic vibrator 12, linear scanning and It is possible to perform both radial scanning and radial scanning. Furthermore, by combining these linear scans and radial scans, it is also possible to perform cylindrical scanning and obtain a linear scanned image of a specified cross section.

an electrode 208d of the radial drive electrostatic motor 210;
Since 209d is provided in the axial direction of the shaft 25, this shaft 25 is connected to the linear drive electrostatic motor 11.
Even if the shaft 25 is slid by 0, this shaft 25
There is no problem with rotation.

12 to 14 relate to the fourth embodiment of the present invention, and the first embodiment
Figure 2 is a side view of the ultrasonic scanning unit, Figure 13 is the x in Figure 12.
The m-xm line arrow diagram and FIG. 14 are explanatory diagrams of the initial state of the ultrasonic scanning unit.

The ultrasonic scanning unit 13 of this embodiment is composed of an ultrasonic transducer 12 and a shaft 25, as in the third embodiment described above, and is formed relatively long on the base end side of the shaft 25. The rotor 9 is fixed, and this rotor 9 is
It is surrounded by a stator 8 formed into a substantially cylindrical shape.

The rotor 9 has a plurality of electrodes 9d formed in a substantially rectangular shape.
are provided in the axial direction of the shaft 25, while substantially rectangular electrodes 8 are provided on the inner periphery of the cylindrical substrate 8a of the stator 8.
d are arranged linearly in the axial direction of the stator 8 and radially around the shaft 25, and by applying a voltage to appropriate ones of these electrodes 8d and 9d, the electrodes shown in FIG. As shown in the figure, the shaft 25 can be slid in a linear direction, and the shaft 25 can also be rotated.

Note that the insulating layer 8c of the stator 8 and the insulating layer 9 of the rotor 9
A predetermined gap is formed between C and C.

In this embodiment, since it is possible to perform both linear scanning and radial scanning with one electrostatic motor 10, it is possible to realize further miniaturization of the device compared to the third embodiment described above. It is.

15 and 16 relate to a fifth embodiment of the present invention, FIG. 15 is a side view of the ultrasonic scanning section, and FIG. 16 is an explanatory view of the operation state of the ultrasonic scanning section.

In this embodiment, a pair of electrostatic motors 10 are installed at the tip of the insertion section.
are arranged parallel to each other and parallel to the axis of the insertion section, and the rotor 9 of this electrostatic motor 10 is extended toward the distal end side of the insertion section, and each of the extended distal ends is It is pivoted to the ultrasonic transducer 12.

Therefore, the rotor 9 of one electrostatic motor 10 (located at the bottom of the figure) is moved toward the proximal end of the insertion section, that is, to the right in the figure, and the rotor 9 of the other electrostatic motor 10 is moved toward the insertion section. When the rotor 9 is moved toward the distal end, the ultrasonic transducer 12 rotates so as to be directed downward from the center line of the insertion section, as shown in FIG. The transducer 12 is rotated in the opposite direction, and sector scanning is performed by rotating the ultrasonic transducer 12.

Note that in order to rotate the ultrasonic transducer 12 by the electrostatic motor 10 that moves in a linear direction, the ultrasonic transducer 1
Even if one end of the ultrasonic transducer 2 is pivotally fixed to the insertion portion and the rotor 9 of the #vi electric motor 10, which is singularly arranged at the other end of the ultrasonic vibrator 12, is pivoted, the same effect as ff1 can still be achieved. However, if configured as in this embodiment, the rotor 9
A large rotation angle of the ultrasonic transducer 12 can be obtained by a slight movement of the ultrasonic transducer 12, and scanning can be performed in a short time.

17 to 19 relate to the sixth embodiment of the present invention, in which FIG. 17 is a side view of the ultrasonic scanning section, FIG. The figure is a perspective view of the rotor.

In this embodiment, a distal end portion 7 surrounded by a member that transmits ultrasonic waves is provided at the distal end of the insertion portion 4, and this distal end portion 7 is fixed to the distal end side of the insertion portion 4 via a connection cap 7a. There is. A rotating member 16 that can freely rotate around the axis of the insertion section 4 is disposed inside the distal end 7, while a circular rotary member 16 is provided on the base end side of the distal end 7. A type electrostatic motor 10 is provided.

A large diameter portion 26a formed on the base end side of the rotating member 26 and the rotor 9 of the electrostatic motor 10 are fixed. Further, a flat portion 26b is provided at the center of the rotating member 26.
is formed, and an ultrasonic transducer 12a capable of emitting an ultrasonic wave of, for example, 1QHIlz and an ultrasonic transducer 12b capable of emitting an ultrasonic wave of, for example, 58H2 are fixed on both sides thereof.

As shown in FIG. 19, a plurality of rectangular electrodes 8d and 9d are arranged approximately radially on the stator 8 and rotor 9, and a coil-shaped electrode 27 is provided at the center of the stator 8 and rotor 9.
are placed facing each other.

Further, the stator 8 and rotor 9 are slightly spaced apart from each other. The driving signals for the ultrasonic transducers 12a and 12b are transmitted and received by electromagnetic induction between the picture electrodes 27 provided on the stator 8 and the rotor 9.

According to this configuration, by rotating the rotating member 26 around the axis of the insertion portion 4, low frequencies have little attenuation, and high frequencies are advantageous for observing relatively close areas. Observation 16 is performed by switching the driving ultrasonic transducers 12a and 12b using the properties of sound waves.
It is possible to perform radial scanning with different depths of the site.

In this embodiment, the stator 8. Due to electromagnetic induction between the coils provided on the rotor 9, the ultrasonic sensors 12a, 1
The signal for driving 2b is stator 8° rotor 91I! However, this part can also be configured as shown in FIG.

This technology is based on the central part of the stator 8 and the rotor 9.
A first piezoelectric element 28a is disposed on the stator 8 side of the rotor 9, and a second piezoelectric element 28a is disposed on the stator 8 side of the rotor 9, and degassed water is provided between the first and second piezoelectric elements 28a and 28b. An ultrasonic transmitter 29 such as the above is interposed.

Then, the first piezoelectric element 28a on the stator 8 side is vibrated, and this imaging is transmitted to the second piezoelectric element 28b on the rotor 9 side via the ultrasonic transmitter 29. The ultrasonic transducers 12a and 12b convert the voltage into voltage.
to drive. Furthermore, the echoes reflected from the living body are transmitted to the first piezoelectric element 12a by an action opposite to that described above, and transmitted to the ultrasound image observation device 3 via the cable 14.

Furthermore, as shown in FIG. 21, the stator 80 and rotor 9
A piezoelectric element 28 may be disposed on the side, and a predetermined gap may be formed between the piezoelectric element 28 and the rotor 9.

With this configuration, when a voltage is applied to the piezoelectric element 28 and the piezoelectric element 28 is photographed when rotating the rotor 9, the coefficient of friction between the stator 8 and the rotor 9 is reduced due to this vibration.
Rotation of the rotor 9 becomes smooth.

22 and 23 relate to a seventh embodiment of the present invention, in which FIG. 22 is a side view of the ultrasonic scanning section, and FIG. 23 is a perspective view of the tip of the insertion section.

In this embodiment, the rotating member 26 rotatably disposed on the distal end portion 7 in the sixth embodiment described above is provided perpendicular to the axis of the insertion portion 4, and the distal end portion A pair of rotary-type electrostatic motors 10 are disposed above and below 7, that is, at opposing positions across the central axis. Large diameter portions 26a formed at the upper and lower ends of the rotating member
is fixed to the rotor 9 of the electrostatic motor 10.

Furthermore, the stator 8 of this electrostatic motor 10 is connected to the insertion portion 4.
One end of the cable 14 is connected to the extended portion.

With such a configuration, the electrostatic motor 10 is driven to perform radial scanning around an axis perpendicular to the axis of the insertion portion 4 as a rotation center.

In this embodiment, the rotating member 26 is operated by a pair of electrostatic motors 10.
Since the rotating member 26 is configured to be driven, it has the effect that the driving force of the rotating member 26 is large.

FIG. 24 is a side view of an ultrasonic scanning section according to an eighth embodiment of the present invention.

In this embodiment, a rotating member 26 that can freely rotate around the axis of the insertion portion 4 is disposed at the distal end portion 7, similar to that described in the sixth embodiment. At the same time, the large diameter portion 26a provided on the proximal end side of the rotating member 26 is connected to the rotor 209 of the rotary type electrostatic motor 210 disposed on the proximal end side of the distal end portion 7. Fixed.

The flat part 26b provided at the center of the rotating part 026 is relatively long, and the stator 10 of the linear drive electrostatic motor 110 is provided on both sides of the flat part 26b.
8 are provided in the longitudinal direction of the insertion portion 4, and a rotor 109, which is formed shorter than the flat portion 26b, is in sliding contact with each of the stators 108. This rotor 109 is engaged with the stator 108 via a rail member (not shown), and even if the rotary member 26 is rotated by the electrostatic motor 210 formed in a rotary type, the rotor 109 remains connected to the stator 108. While care has been taken to ensure that the rotors do not come off the rotors 108, ultrasonic transducers 12a and 12b that can emit ultrasonic waves of different frequencies are fixed to the pair of rotors 109.

With this configuration, the 0-tally type electrostatic motor 210
By driving the rotor 209 to rotate relative to the stator 208 and rotating the rotating member 26, the ultrasonic transducers 12a and 12b are rotated relative to the axis of the insertion section 4, and the linear By driving the driving ωJ electrostatic motor 210, the ultrasonic transducers 12a and 12b are moved parallel to the axis of the insertion portion 4 to perform radial scanning and linear scanning.

FIG. 25 is a side view of an ultrasonic scanning section according to a ninth embodiment of the present invention.

In this embodiment, a rotating member 26 is configured to be able to rotate around the axis of the insertion portion 4 via an electrostatic motor 10.
The ultrasonic transducer 12 is disposed on the flat part 26t), and a laser oscillation unit 3o capable of emitting laser pulses is fixed adjacent to the ultrasonic transducer 12. be.

When the electrostatic motor 10 is driven with this configuration, the rotating member 26 and the ultrasonic vibrator 12 are rotated, and the ultrasonic wave F
Radial scanning by the it lJr child 12 is performed. Further, as the rotating member 26 is rotated, the laser oscillation unit 30 emits a laser pulse to the living body, and a sound unique to the composition reflected by the photoacoustic effect is transmitted to the ultrasonic transducer 12.
It becomes possible to obtain a photoacoustic effect image of the tissue by receiving the signal at the .

Incidentally, this embodiment can also be applied to a technique such as 1 shown in FIGS. 28 and 29.

In this technique, a rotating member 26 that can rotate around the axis of the insertion portion 4 is provided at the distal end 7, and a light emitting element 31a is mounted on both sides of a flat portion 26b of the rotating member 26. and a light receiving element 31b are provided adjacent to each other.

Then, while rotating the rotating member 26 via the electrostatic motor 10, the light emitting element 31a emits light, and the light reflected from the inner wall of the body cavity or the like is received by the light receiving element 31b, thereby performing spectroscopic analysis of the living body. I do.

FIG. 26 is a side view of an ultrasonic scanning unit according to a tenth embodiment of the present invention.

In this embodiment, a four part 7b is formed in a bullet-shaped tip part 7 made of a member through which ultrasonic waves can pass, and an electrostatic motor 10 is disposed on the base end side of this recessed part 7b. There is. The stator 8 of the electrostatic motor 10 is fixed to the connection cap 7a on the side of the insertion portion 4, while the stator 8 of the electrostatic motor 10
The rotor 9 is rotatably supported by an engaging portion 32 formed on the stator 8, while being prevented from being disengaged.

A plurality of ultrasonic transducers 12 are arranged radially around the axis of the insertion section 4 on the surface of the rotor 9 opposite to the stator 8, and as the rotor 9 rotates, the ultrasonic transducers 12 are inserted. It is configured to rotate around the axis of the portion 4.

On the other hand, in the part of the recess 7b facing the []-ta 9,
A bell-shaped reflecting member 34 having a slope 33 formed to be spaced apart from the axis of the insertion portion 4 toward the distal end side is provided. The slopes 33 of the reflecting member 34 are formed at 45° intervals around the axis of the insertion portion 4,
At the slope 34 of the reflecting member 33, the ultrasonic waves from the ultrasonic transducer 12 emitted parallel to the axis are transmitted through the member constituting the tip 7 and directed in a direction perpendicular to the axis. It's starting to turn against I.

With this configuration, when the rotor 9 of the electrostatic motor 10 is rotated by driving the electrostatic motor 10 and the ultrasonic transducer 12 disposed on the rotor 9 emits ultrasonic waves, This ultrasonic wave is reflected by the slope 33 of the reflecting member 34 and emitted in the entire circumferential direction perpendicular to the center of the insertion portion 4, and the echo caused by the ultrasonic wave is reflected again by the slope 33. Radial scanning is performed by being received by the ultrasonic transducer 12.

FIG. 27 is a side view of an ultrasonic scanning section according to an eleventh embodiment of the present invention.

In this embodiment, the rotor 9 of the electrostatic motor 10 is provided on the proximal end side of the distal end portion 7 so as to be perpendicular to the axis of the insertion portion 4.
A reflecting member 34 having a slope 33 at an angle of 45° with respect to the axis of the insertion portion is fixed.

On the other hand, an ultrasonic transducer 12 to which one end of a cable 14 is connected is disposed in a part of the recess 7b formed in the tip 7 that faces the rotor 9. Ultrasonic waves emitted from the slanted surface 33 pass through the member constituting the distal end 7 and are reflected in a direction perpendicular to the axis of the insertion section 4.

With this configuration, when the electrostatic motor 10 is driven and rotated, the rotor 9 of the electrostatic motor 10 is rotated, and the ultrasonic transducer 12 emits ultrasonic waves while rotating the reflection member 34. When the sound waves are reflected by the slope of the reflecting member 34, they are emitted in a direction perpendicular to the axis of the insertion portion 4. Furthermore, echoes caused by this ultrasonic wave are reflected by the slope 33 and received by the ultrasonic transducer 112, thereby performing radial scanning.

[Effects of the Invention] As explained above, in the ultrasonic diagnostic apparatus according to the present invention, the ultrasonic transducer has good followability regardless of whether the insertion section has a rigid or flexible configuration, and the insertion section This has the effect that it is possible to make the diameter smaller, and it is also possible to make the size smaller by 4&.

[Brief explanation of the drawing]

1 to 5 relate to the first embodiment of the present invention, FIG. 1 is a side view of the ultrasonic scanning section, FIG. 2 is an explanatory diagram of the operating state of the ultrasonic scanning section, and FIG. 3 is an electrostatic An explanatory diagram of the motor, FIG. 4 is a block diagram of the control unit, and FIG. 5 is a schematic configuration diagram of the endoscopic a device.
6 and 7 relate to a second embodiment of the present invention, in which FIG. 6 is a side view of the ultrasonic scanning section, FIG. 7 is an explanatory diagram of the operating state of the ultrasonic scanning section, and FIGS. 8 to 11. The figures relate to the third embodiment of the present invention, FIG. 8 is a side view of the ultrasonic scanning section, FIG. 9 is an explanatory diagram of the operating state of the ultrasonic scanning section, and FIG. 11 is an explanatory diagram of the electrostatic motor, FIGS. 12 to 14 relate to the fourth embodiment of the present invention, FIG. 12 is a side view of the ultrasonic scanning unit, and FIG. Fig. 14 is an explanatory diagram of the operating state of the ultrasonic scanning unit.
5 and 16 relate to the fifth embodiment of the present invention, and the fifteenth embodiment
The figure is a side view of the ultrasonic scanning section, and Figure 16 shows the operation of the ultrasonic scanning section! 21i explanatory drawings, and FIGS. 17 to 19 relate to the sixth embodiment of the present invention, FIG. 17 is a side view of the ultrasonic scanning section, and FIG. 18 is the arrow indicated by the line X■-X■ in FIG. 19 is a perspective view of the rotor, FIG. 20 is a side view of an electrostatic motor showing a modification of the sixth embodiment, and FIG. 21 is a side view of an electrostatic motor showing a modification of the sixth embodiment. , FIG. 22 and FIG. 23 relate to a seventh embodiment of the present invention, FIG. 22 is a side view of the ultrasonic scanning section, FIG. 23 is a perspective view of the tip of the insertion section, and FIG. 24 is a seventh embodiment of the present invention. FIG. 25 is a side view of the ultrasonic scanning unit according to the ninth embodiment of the present invention, and FIG. 26 is a side view of the ultrasonic scanning unit according to the tenth embodiment of the present invention. FIG. 27 is a side view of the ultrasonic scanning section according to the eleventh embodiment of the present invention, FIGS. 28 and 29 are a modification of the ninth embodiment, and FIG. 28 is a side view of the ultrasonic scanning section according to the eleventh embodiment of the present invention. , FIG. 29 is a view taken along arrows XXIX-XXIXIa in FIG. 28, and FIG. 30 is a side view of the insertion portion showing a modification of the first embodiment. 4... Insertion section 7 ・ 8 ・ 9 ・ ・Tip section・Stator・Rotor・Electrostatic motor・Ultrasonic scanning section Fig. 5 Fig. 6 Fig. 1z Fig. 7 Fig. 8 Prisoner 9 Section 10 Fig. 12 Figure 13 Figure 14a Figure 18 Figure 20 Figure 19 Figure 21 Figure 23 Figure 24 Figure 25

Claims (1)

[Claims] An electrostatic motor that moves the rotor by providing electrodes on the opposing rotor and stator and applying voltage to these electrodes is provided at the tip of the insertion section to be inserted into the subject, and is installed inside the tip. An ultrasonic diagnostic device characterized by being connected to an ultrasonic scanning section.