JPS6168034A - Ultrasonic probe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ultrasonic probe used for ultrasonic diagnosis.

Conventional configuration and its problems Conventionally, a reciprocating scanning type ultrasound probe has been proposed in which an electroacoustic transducer is mechanically driven in a pendulum-like reciprocating manner to perform ultrasound diagnosis. .

In this ultrasonic probe, a lead wire from an electroacoustic transducer was brought into contact with a terminal wired on an arc-shaped printed circuit board or the like through a slip ring to extract and send signals. For this reason, there have been problems such as wear of the contact portions, poor contact due to dust, etc., and generation of sliding noise.

OBJECTS OF THE INVENTION In view of the above drawbacks, the present invention provides an ultrasonic probe that eliminates mechanical contact parts to prevent wear, poor contact, and sliding noise.

Structure of the Invention In order to achieve the above object, the present invention provides a holding member whose central portion is rotatably supported, an electroacoustic transducer held at one end of the holding member, and an electroacoustic transducer held at the other end of the holding member. a movable transformer connected to the electro-acoustic transducer; an arc-shaped fixed transformer that faces the movable transformer that performs pendulum-like reciprocating motion with a substantially constant gap; The device is characterized by comprising a transmitting/receiving circuit unit connected to a transformer.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 and 2, the electroacoustic transducer 1 is held at one end of a cylindrical holding member 2, and the movable transformer 3 is held at the other end of the holding member 2. As shown in FIGS. A lead wire 4 from the electroacoustic transducer 1 passes through the inside of the holding member 2 and is connected to the movable transformer 3, and the movable transformer 3 has a core 5 and a coil 6.
is wrapped. The holding member 2 is rotatably supported at its center, so that when the electroacoustic transducer 1 reciprocates in a pendulum shape, the movable transformer 3 reciprocates at the same diagonal angle as the electroacoustic transducer 1. It can be carried out. A fixed transformer 7 is provided at a predetermined distance from and facing the movable transformer 3. This fixed transformer 7 has a coil 9 wound around a core 8 and is formed into an arc shape. The center of this arc-shaped fixed transformer and the center of rotation of the movable trough 130 approximately coincide, so that the gap between the movable transformer 3 and the fixed transformer 7, which perform reciprocating motion, is kept constant. . The length of the fixed transformer 7 may be determined depending on the swing angle of the reciprocating motion of the movable transformer 3. A transmitting/receiving circuit section 1o is connected to the fixed transformer 7, which transmits a drive signal to the electroacoustic transducer 1 and receives a reflected signal.

On the other hand, the rotation drive unit 11 is connected to a transmission unit 12 that transmits rotational force, and this transmission unit 12 is connected to a rotation-reciprocating motion conversion unit 13.
The rotary motion is converted into a linear reciprocating motion, and this reciprocating motion is coupled to the movable section 16 that is coupled to the holding member 2 via the transmission section 14.

Therefore, ultrasonic diagnosis can be performed by reciprocating the holding member 2 by driving the rotary drive unit 11 and driving the electroacoustic transducer 1 while reciprocatingly scanning it in a pendulum shape. At this time, since the gap between the movable transformer 3 and the fixed transformer 7 is always kept substantially constant, the transmission and reception of signals can be stabilized.

Effects of the Invention As is clear from the above explanation, according to the present invention, by rotating the holding member, the electroacoustic transducer and the movable transformer held on both sides of the holding member and connected to each other are held in a pendulum shape at equal diagonal angles. The transmitter/receiver circuit system is connected to a stationary transformer which is placed opposite the reciprocating movable transformer with a fixed gap. Therefore, since there are no mechanically contacting parts in the driving circuit system and the receiving circuit system, there are advantages such as being able to prevent poor contact and generation of sliding noise.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an ultrasonic probe according to an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of the essential parts thereof. DESCRIPTION OF SYMBOLS 1... Electro-acoustic conversion element, 2... Holding member, 3... Movable transformer, 7... Fixed transformer, 10... Transmitting/receiving circuit section, 11...
・Rotary drive unit, 15... Name of agent: Patent attorney Toshio Nakao 1 person Wl1 drawing award 2 drawings

Claims (1)

[Claims] a rotatably supported holding member; an electroacoustic conversion element held at one end of the holding member; a movable transformer held at the other end of the holding member and connected to the electroacoustic conversion element; and a pendulum. The present invention is characterized by comprising: an arc-shaped fixed transformer that faces the movable transformer with a substantially constant gap therebetween; and a transmitting/receiving circuit connected to the fixed transformer. Ultrasonic probe.