JP2570255Y2 - Transducer structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an underwater ultrasonic transducer.

[0002]

2. Description of the Related Art Conventionally, this type of transducer is disclosed in, for example, Japanese Utility Model Publication No. 49-16770, "Underwater electroacoustic transducer".
Alternatively, there is one disclosed in Japanese Patent Application Laid-Open No. 02-087798, "Vibration Noise Suppression Receiver".

FIG. 7 is a cross-sectional view showing a conventional transducer structure, and shows a case where three transducers are provided as an example. In the figure, 1A to 1C are oscillators, 2A to 2D are buffer seats sandwiching the oscillators 1A to 1C, 3A and 3B, respectively.
Is an end face plate, 4 is a bolt, 5A and 5B are nuts, 6 is a coated lead wire electrically connected to the vibrators 1A to 1C, and 7 is a coating of urethane rubber or the like.

In the transmitter / receiver structure having this configuration, the vibrators 1A to 1C are sandwiched between buffer seats 2A to 2D, respectively, and connected by bolts 4 and nuts 5A and 5B. At this time, the covered conductive wires electrically connected to the vibrators 1A to 1C are wired so as to have predetermined electric characteristics. The whole connected oscillator is molded with a covering 7 such as urethane rubber.

[0005]

However, in the transmitter / receiver having the above structure, when the diameter of the vibrator is reduced due to the use frequency, the wire connecting portion between the coated conductors is connected to the inner diameter of the vibrator and the bolt. There has been a problem that it is difficult to store in the gap with the outer diameter.

The present invention eliminates the above-mentioned problem that it is difficult to accommodate the wiring connection portion of the covered conductor for connecting the small-diameter vibrators to each other between the inner diameter of the vibrator and the outer diameter of the bolt. In order to provide a small transducer that extends the electrode range of the vibrator to the cylindrical end face thereof and makes electrical wiring by contact with a printed wiring board, and does not require a space for a wiring connection part. With the goal.

[0007]

In the transducer structure according to the present invention, the positive and negative electrodes on the inner and outer surfaces of the cylindrical vibrator are extended with an interval between the positive and negative electrodes up to the end surface of the cylindrical vibrator. The electrical connection means for electrically connecting the positive and negative electrodes on the cylindrical end face includes a conductor corresponding to the positive and negative electrodes and a printed wiring board having through holes for signal output on both sides, or a conductor corresponding to the positive and negative electrodes. The flexible printed wiring board comprises a plurality of disk portions and a connecting portion for electrically and mechanically connecting the disk portions.

[0008]

According to the present invention, it is possible to reduce the size, facilitate the assembly, and obtain a highly reliable transducer structure.

[0009]

FIG. 1 is a sectional view showing an embodiment of the structure of a transducer according to the present invention. As an example, two transducers are provided. In the figure, reference numerals 8A and 8B denote vibrators having positive and negative electrodes formed on a cylindrical end face, as shown in a detailed perspective view of FIG. In the vibrators 8A and 8B, the positive and negative electrodes are extended to a cylindrical end face at a constant interval. 9 is a printed wiring board whose detailed plan view is shown in FIG. Since this printed wiring board 9 has the same configuration on the front side and the back side, only the front side is shown.
Conductor portions 10A and 10B corresponding to the electrodes formed on the cylindrical end surface of the vibrator 8A are formed, conductors are printed and wired in accordance with a predetermined circuit configuration between the vibrators, and a through for signal output of the vibrator is provided. Holes 11A and 11B are provided. 12A and 12B are conductors connected to the through holes 11A and 11B, respectively.

Next, the assembling operation of the transducer with the above configuration will be described. First, after the bolts 4 are passed through the printed wiring board 9, the positive and negative electrodes formed on the cylindrical end faces of the vibrators 8A and 8B are brought into contact with the conductor portions 10A and 10B provided on both sides of the printed wiring board 9, respectively. Then, the buffer seats 2A and 2B and the end plates 3A and 3B are inserted from both ends of the bolt 4, and tightened with nuts 5A and 5B to be integrated. The vibrators 8 are provided in the through holes 11A and 11B for signal output provided in the printed wiring board 9.
Since the signals obtained by combining the outputs of A and 8B in accordance with a predetermined circuit configuration are received, conductors 12A and 12B penetrating buffer seat 2B and end plate 3B are connected to through holes 11A and 11B, respectively. The conductors 12A and 12B are entirely covered with a covering 7 such as urethane rubber so that the conductors 12A and 12B are exposed from the covering 7.

FIG. 4 is a sectional view showing another embodiment of the structure of the transducer according to the present invention. In the figure, 13A and 1
3B is an anisotropic conductive rubber plate inserted between the printed wiring board 9 and the vibrators 8A and 8B.

In the second embodiment, it is needless to say that the vibrators 8A and 8B and the printed wiring board 9 can be assembled in the same manner as described in the first embodiment shown in FIG. Together with the anisotropic conductive rubber plate 13A,
Because it is pressed through 13B, only the pattern conducts,
In addition, a sufficient contact area can be ensured due to the contact with the elastic body.

FIG. 5 is a sectional view showing still another embodiment of the transducer structure according to the present invention. In the figure, reference numeral 14 denotes a disk portion 14A, 14B as shown in FIG.
And a flexible printed wiring board 15 comprising a connecting portion 14C for connecting these disc portions 14A and 14B.
6B, this flexible printed wiring board 14 is folded at a connecting portion 14C as shown in FIG.
A rubber sheet inserted between A and 14B.

In the third embodiment, the flexible printed wiring board 14 and the rubber sheet 15 function in the same manner as the printed wiring board 9 in the first embodiment shown in FIG. Of course, it is possible to assemble it.

The flexible printed wiring board 14
Since the rubber sheet 15 is disposed on the back side of the contact portion with the vibrators 8A and 8B, the contact area of the contact portion can be sufficiently ensured.

In the above-described embodiment, the case where two vibrators are provided is shown. However, the present invention is not limited to this, and it goes without saying that the same can be achieved by providing three or more vibrators.

[0017]

As described above in detail, according to the transducer structure of the present invention, since the electrical connection between the plurality of vibrators is performed at the cylindrical end surface of the vibrator, the transducer is small (small diameter). A transducer using a vibrator can be manufactured, and
By mechanically connecting and assembling, there is an effect that desired performance can be easily exhibited and quality can be maintained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a transducer structure according to the present invention.

FIG. 2 is a perspective view showing details of a vibrator shown in FIG. 1;

FIG. 3 is a plan view showing details of the printed wiring board of FIG. 1;

FIG. 4 is a sectional view showing another embodiment of the transducer structure according to the present invention;

FIG. 5 is a sectional view showing still another embodiment of the transducer structure according to the present invention;

FIG. 6 is a diagram showing details of the flexible printed wiring board of FIG. 5;

FIG. 7 is a sectional view showing the structure of a conventional transducer.

[Explanation of symbols]

 8A, 8B Oscillator 9 Printed wiring board 10A, 10B Conductor 11A, 11B Through hole 12A, 12B Conductor 13A, 13B Anisotropic conductive rubber plate 14 Flexible printed wiring board 15 Rubber sheet

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04R 17/00 330 H04R 1/44 330

Claims (3)

(57) [Scope of request for utility model registration] The positive and negative electrodes of a plurality of cylindrical vibrators are connected by electrical connection means, and integrated by connection means,
In the transducer structure in which the whole is molded with a coating, the cylindrical vibrator extends inner and outer surface positive and negative electrodes to a cylindrical end surface with a positive and negative electrode interval, and the electrical connection means includes the cylindrical type. A transducer structure as a printed wiring board having conductors corresponding to the positive and negative electrodes formed on the cylindrical end surface of the vibrator and through holes for signal output on both surfaces. 2. The transducer structure according to claim 1, wherein an anisotropic conductive rubber plate is provided between the positive and negative electrodes on the cylindrical end face of the cylindrical vibrator and a printed wiring board as an electrical connection means. 3. The electrical connection means includes two disk portions having conductors corresponding to positive and negative electrodes formed on a cylindrical end surface of the cylindrical vibrator, and electrically and mechanically connects the disk portions. 2. The transducer structure according to claim 1, further comprising: a flexible printed wiring board comprising a connecting portion; and a rubber sheet which is formed by bending the flexible printed wiring board at the connecting portion and inserted between opposed disk portions.