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JPS63168154

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DESCRIPTION JPS63168154
[0001]
The present invention relates to a sector scan type probe which mechanically scans an oscillator
in, for example, an ultrasonic diagnostic apparatus. Furthermore, conventionally, in this type of
device, a device in which a vibrator is mechanically scanned on the surface of a sample by a drive
device using an electromagnetic drive device or a gear has been proposed. However, such
conventional devices have the disadvantages of large size, complicated operation and high cost.
In order to solve the above-mentioned drawbacks, the present invention solves the abovementioned drawbacks by providing a case, a vibrator case rotatably provided inside the case by a
shaft, and the vibration. A motor mounted on the vibrator case mounted on the back case via a
back member, an arm rotatably mounted at one end on the support shaft mounted on the
vibrator case at right angles to the axis, and rotated by a motor, It is characterized by comprising
a rotary plate provided with an insertion hole into which the other end of the arm is inserted. In
the present invention, when the rotary plate is rotated by the motor, the arm rotates with respect
to the support shaft attached to the vibrator case, and the arm is provided in the case which is an
axis perpendicular to the support shaft Since the transducer case is pivoted by the arm about the
shaft, the transducer attached to the transducer case is pivoted, and ultrasonic waves are
generated by scanning the transducer within a predetermined angle. FIG. 1 is a cross-sectional
view of a sector scan type probe according to one embodiment of the present invention, and is
separated from the cover 2 provided at the end of the case 1 by a predetermined distance inside
the case 1 An opposing protrusion 3.3 serving as an axis is provided, and the vicinity of one end
of the cylindrical vibrator case 4 is rotatably supported by the protrusion 3.3, and the other end
of the vibrator case 4 is packed. The vibrator 6 is mounted via the material 5. The output
direction of the ultrasonic waves generated from the vibrator 6 is in the direction of the cover 2
of the case 1, and the cover 2 in the front of the vibrator 6 is filled with oil. Further, a support
shaft 7 is provided orthogonal to the protrusion 3.3 for supporting the vibrator case 4, and one
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end 8 a of the arm 8 is rotatably supported by the support shaft 7. Further, a motor 9 having a
rotating shaft 10 is supported in the vicinity of the extension of the intersection point of the
center line of the projections 3 and 3 of the case 1 and the center line of the support shaft 7. Is
fixed. Further, an insertion hole 12 is provided in the rotary plate 11, and the other end of the
arm 8 is inserted into the insertion hole 12. Next, the operation of this embodiment will be
described with reference to the plan view of the vibrator case as viewed from the arm side of FIG.
2 and the plan view of the disc of FIG.
First, when the motor 9 rotates and the insertion hole of the rotary plate 10 is on the upper side
of the drawing as shown in FIGS. 1 and 3, the position where the arm 8 can be rotated by the
support shaft 7, that is, vibration The child 6 faces the front of the cover 2. Here, when the
insertion hole of the single rotation plate lO comes to the position B in FIG. 3, the arm 8 can not
be rotated by the support shaft 7 and therefore, with the vibrator case 4 around the protrusion
3.3 of the case 1 as a shaft Move. At this time, the vibrator 6 faces the opposite direction of the
position (B in FIG. 3) of the insertion hole 11 of the rotary plate 10, and further, when one rotary
plate 10 is rotated and comes to the position of C in FIG. The position 8 can be rotated by the
support shaft 7, that is, the position where the vibrator 6 faces the front. Furthermore, when the
insertion hole 11 of the rotary plate 10 comes to the position D in FIG. 3, the arm 8 can not be
rotated by the support shaft 7, and hence the protrusion 3.3 of the case 1 is used as a shaft along
with the vibrator case 4. Move. At this time, the vibrator 6 faces in the direction opposite to the
position [1 (D in FIG. 3) of the insertion hole 11 of the rotary plate 10. In this embodiment, only
by rotating the motor 9 and rotating the rotary plate 10 in this manner, the vibrator 6 is
alternately inclined in the opposite direction, so the sample surface is scanned within the range
of the rotation angle of the vibrator. be able to. In the description of the above embodiment, the
protrusion 3.3 serving as the shaft is formed inside the case 1, but a bearing may be provided on
the vibrator case 4 side in order to improve the rotation of the vibrator case 4. And not only the
projections. As long as the vibrator case 4 can be rotated, it may be a shaft, and further, a
protrusion or a shaft may be provided on the vibrator case 4 side, and in this case, a bearing may
be provided on the case 1 side. As apparent from the above description, according to the present
invention, the present invention can rotate the vibrator by a predetermined angle with a simple
mechanism for rotating the motor, and the mechanism for rotating the vibrator is also compact.
Cost, so it has the advantage of being cheap.
[0002]
Brief description of the drawings
[0003]
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2
1 is a sectional view of a sector scan type probe according to an embodiment of the present
invention, FIG. 2 is a plan view of a transducer case seen from the arm side of FIG. 1, and FIG.
FIG.
DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... cover, 3, 3 ... protrusion, 4 ... vibrator case, 5 ... back
material, 6 ... vibrator, 7 ... support shaft, collar · · · Arm, 9 · · · motor, 10 · · · rotating plate, 11 · · ·
insertion hole.
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