JP2535898Y2 - Ultrasonic solid retarder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic solid-state delay element in which the number of manufacturing steps is reduced with a resin container and the thickness of the container is reduced.

[0002]

2. Description of the Related Art Conventionally, a container for an ultrasonic solid state delay element has a ceramic transducer in which an electrode is formed on a glass delay medium in a resin container and is attached to one side of a side surface, and leads are connected from the electrode of the transducer to a container terminal by a lead wire. And had a lid. However, when a lead wire is used, as shown in the sectional view of FIG. 3, when the lead wire 12 is soldered to the transducer 11 and the lead wire 12 is bent along the glass delay medium 13, the lead wire does not bend at a right angle, and the lead wire and the electrode are connected. When fixed with solder, the tip of the lead protrudes beyond the thickness of the glass delay medium. For this reason, there was a disadvantage that the thickness of the container was not easily reduced.

[0003]

Therefore, an ultrasonic solid-state delay element that does not use a lead wire has been demanded, and an element using conductive rubber has been disclosed. However, since the conventional conductive rubber has carbon or metal filler mixed in the rubber material, it is necessary to cut apart each electrode and separate them. In addition, it is necessary to press the rubber to improve the contact between the rubber and the electrode. Therefore, the rubber is pushed into the narrow part or the conductive rubber is pushed while the delay medium is put in the case.

[0004]

Therefore, in the present invention, it is possible to eliminate the trouble of separating the conductive rubber for each electrode by using an anisotropic conductive rubber, and to press the conductive rubber by providing a lid projection on the lid, the lid and the case. When the conductive rubber is fixed, pressure is applied to the conductive rubber, the contact resistance is reduced, and the conductivity is improved.

[0005]

1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a partial sectional view. The case 1 is made of a resin, and has a concave portion 3 for receiving the delay medium 2 made of glass on the main surface. A transducer 4 for converting an electric signal into ultrasonic energy is attached to one side of the delay medium 2, and a terminal 5 for inputting and outputting an electric signal is fixed to the case 1 below the delay medium 2. Is derived. In FIGS. 1 and 2,
The spurious stop provided on the delay medium is omitted. The terminal 5 may be an insert terminal or a metalized printed terminal. Concave part 3 of case 1 provided with terminal 5
When the delay medium 2 to which the transducer 4 provided with the electrodes 10 and 10 ′ is attached is inserted into the terminal 5, the terminal 5 and the electrode 10 face each other at right angles, and the inner surface of the concave portion 3 of the case 1 and the terminal 5 A space is created between the electrode 10 and the electrode 10. An anisotropic conductive rubber 6 is arranged in a space created between the inner surface of the concave portion 3 of the case 1 and the terminal 5 and the electrode 10. The electrode 10 applied to the transducer 4 and the terminal 5 come into contact with each other via the anisotropic conductive rubber 6, thereby establishing an electrical connection between the electrode 10 and the terminal 5. The anisotropic conductive rubber has a metal film bound between the rubbers and has a property of conducting with directionality. For example, the anisotropic conductive rubber has a property of conducting in the horizontal direction but not conducting in the vertical direction. For this reason, as shown in the partial cross-sectional view of FIG.
Are in contact with each other via the conductive rubber 6 and conduct. In this embodiment, a terminal portion projection 7 is provided on the conductive rubber contact surface of the terminal 5,
Ensure more reliable contact conduction. When the anisotropic conductive rubber is used, contact between the transducer electrodes and the terminals is ensured, and there is no conduction between the transducer electrodes, between the terminals, and between the non-opposed transducer electrodes and the terminals. Only the contact between the electrode of the transducer and the contact portion of the terminal facing each other is subjected to conduction. The electronic component 20 connected to the conductive rubber 6 is an impedance element when the delay element is used as a comb filter, and uses a resistor or a capacitor. When simply used as a delay element, the electronic component 20 is not used.

Further, in the present invention, in order to ensure the contact between the conductive rubber 6 and the terminals 5 and the electrodes 10, the case 1 is attached to the lid 8.
When the lid 8 is fixed and sealed, a protrusion 9 is provided at a position just opposite to the position where the conductive rubber 6 is disposed. When the case 1 and the lid 8 are fixedly sealed, the projection 9 projects to a height at which the conductive rubber 6 can be pressed from the surface of the conductive rubber 6 facing the lid 8. By firmly sealing the case 1 and the lid 8, the conductive rubber 6 pressed by the projection 9 is deformed,
The deformed conductive rubber 6 applies pressure to each surface that comes into contact with the terminal 5, the electrode 10, and the inner surface of the concave portion 3 of the case 1, thereby making the contact on each surface more reliable. In the contact connection using the conductive rubber, the contact resistance is reduced when a stronger pressure is applied. Therefore, by providing the projection 9 on the lid 8, the conductive rubber is inserted to ensure conduction of the conductive rubber as in the related art. It is possible to reduce the number of steps such as forcibly pushing a conductive rubber larger than the space into the space or inserting the conductive rubber into the case while pressing the delay medium. Also, even if the conductive rubber is slightly smaller than the space where the conductive rubber is inserted, the cover with the projections is fixed and sealed to deform the conductive rubber by pressing and ensuring the contact conduction, thereby further improving reliability. I do. The use of a projection attached to the lid is effective for ensuring conduction even with a conventional non-anisotropic conductive rubber.

Further, in the present invention, a projection 7 is provided on the conductive rubber contact surface of the terminal 5 in order to ensure the contact conduction between the conductive rubber and the terminal. The provision of the terminal protrusions 7 causes the conductive rubber 6 pressed and deformed by the cover protrusions 9 to apply pressure to the respective contact surfaces when the case 1 and the lid 8 are fixedly sealed and sealed. The terminal contact surface is pressed against the terminal protrusion 7, and the terminal protrusion 7 bites into the terminal contact surface of the conductive rubber 6 to increase the contact area and secure contact conduction. Even in the event that the conductive rubber 6 is less pressed by the lid projection 9, contact continuity between the conductive rubber 6 and the terminal 5 is easily ensured, and reliability is improved. Of course, the conductive rubber in this case need not be anisotropic. In the present embodiment, the lid 8 is fixedly sealed with an ultrasonic weld, but may be simply a squeeze or an adhesive.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing a connection portion between a conventional transducer and a lead wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Delay medium 4 Converter 5 Terminal 6 Conductive rubber 7 Terminal projection 8 Lid 9 Lid projection

Claims (2)

(57) [Scope of request for utility model registration] 1. A plurality of converters each having an electrode provided on one side of a delay medium are attached to the delay medium, and the converter is inserted into a case where a delay medium is inserted.
A plurality of terminals corresponding to the transducers are arranged, the delay medium is inserted into the case, a conductive rubber is arranged between the transducer and the terminal, and the conductive rubber is interposed between the transducer and the terminal. the ultrasonic solid delay element for electrical connection, a lump of conductive rubber in the space surrounded by the plurality terminals and said plurality transducer inner surface and the casing inner bottom surface of the case is disposed, said case lid Protrusions are provided on the inner bottom surface at positions facing the terminals, the protrusions pressing the entire surface of the conductive rubber facing the terminal contact surfaces, and terminal protrusions are provided on the contact surfaces of the plurality of terminals with the conductive rubber.
An ultrasonic solid-state delay element characterized in that a wake is arranged. Wherein ultrasonic solid retarders in the range according to claim 1, wherein the utility model claims conductive rubber, wherein the anisotropic.