JP2535897Y2 - Ultrasonic solid retarder - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention realizes a thin container,
Also, the present invention relates to an ultrasonic solid-state delay element in which connection by conductive rubber is ensured.

[0002]

2. Description of the Related Art Conventionally, a container for an ultrasonic solid delay element has a ceramic transducer in which an electrode is formed on a glass delay medium in a resin container, is attached to one side of a side face, and is guided from the electrode of the transducer to a terminal of the container by a lead wire. Had a lid. However, when the lead 13 connected to the transducer 11 is used as shown in FIG. 3, when the lead 13 is bent along the glass delay medium 12,
It does not bend at a right angle, and if the lead wire and the electrode are fixed with solder, the lead tip will protrude 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, if the connection is made with a conventional conductive rubber, it is necessary to apply pressure for connection by contact.

[0004]

Therefore, in the present invention, the case and the lid are fixed and sealed by an ultrasonic weld. For example, even if a convex portion is formed on the lid and the conductive rubber is pressed, the material of the lid is formed. However, since the container is made thin, it is difficult to apply force, and the lid floats. Therefore, when the lid and the case are sealed, if a fixing portion between the lid and the case is provided in the vicinity of the conductive rubber, the lid reliably pushes the conductive rubber and the connection reliability 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 formed of a resin, and has a concave portion 3 on its main surface for receiving the delay medium 2 made of glass. 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 in the horizontal direction but not conducting in the vertical direction.

In order to ensure the contact between the anisotropic conductive rubber 6 and the terminals 5 and the electrodes 10, a projection 8 is provided on the lid 7 at a position just opposite to the inner end of the case of the terminal 5. The projection 8 is fixed to the case 1 and the lid 7 so as to project the anisotropic conductive rubber 6 to a height that can be pressed from the surface of the anisotropic conductive rubber 6 facing the lid 7. By fixing and sealing the case 1 and the lid 7, the anisotropic conductive rubber 6 pressed by the projection 8 is deformed, and the deformed anisotropic conductive rubber 6 is connected to the terminal 5, the electrode 10, and the concave portion of the case 1. 3 Apply pressure to each surface that contacts the inner surface to ensure more reliable contact at each surface. In the contact connection using the conductive rubber, the contact resistance is reduced when a stronger pressure is applied. Therefore, by providing the protrusion 8 on the lid 7, 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. Even if the conductive rubber is slightly smaller than the space for inserting the conductive rubber, the conductive rubber is pressed and deformed by firmly sealing the lid having the protruding portion, and the contact conduction is ensured, so that the reliability is further improved. The use of a projection attached to the lid is effective for ensuring conduction even with a conventional non-anisotropic conductive rubber.

However, even when the projections 8 are provided on the lid, the lid rises because the lid is thin. Therefore, in the present invention, not only the welding of the ultrasonic weld around the lid and the case around the container, but also a place where the lid and the case are welded near the conductive rubber 6 is provided. The fixing points 9, 9 'in FIG.
A concave portion 14 is provided on the case side and a convex portion 15 is provided on the lid side, and when the container is sealed, the concave convex portion is fitted and fixed, or when the periphery of the container is ultrasonically welded, this is caused by ultrasonic vibration. Heat is generated in the uneven portion and welded. As a result, when the lid and the case are fixed in the vicinity of the conductive rubber, the lid is not lifted up, the contact of the conductive rubber is improved, and the reliability is improved. The fixing portion in the vicinity of the conductive rubber is not limited to the ultrasonic weld, but may be simply fixed with an adhesive or fixed by another method.

[0008]

[Effect of the Invention] In the present invention, the protrusion is provided on the conductive rubber portion of the lid, and the welding portion is provided in the vicinity of the conductive rubber. Contact has been secured.

[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 conventional lead wire connection portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Delay medium 4 Transducer 5 Terminal 6 Conductive rubber 7 Lid 8 Projecting part 9, 9 'Fixing part 10, 10' Electrode

Claims (1)

(57) [Scope of request for utility model registration] 1. A delay medium having a plurality of transducers provided with electrodes attached to one side thereof is inserted into a case in which a plurality of terminals corresponding to the plurality of transducers are arranged. and a conductive rubber is disposed between the said terminal, in the ultrasonic solid delay element for electrical connection between the transducer and the terminal via the conductive rubber, said plurality terminals in side and the bottom of the case the case the double and
The conductive rubber lump in a space surrounded by several transducers arranged to press the entire plurality of terminal contact surfaces and opposite faces of the conductive rubber to the plurality terminals facing position of the case bottom surface of the lid protrusion And a place for fixing the case and the lid in the vicinity of the conductive rubber.