JPH03165115A - ultrasonic delay line - Google Patents

Abstract

PURPOSE:To reduce the number of components without use of a cushion member, to reduce the cost and to thin the profile by using a projection provided to an inner wall of a case so as to hold an ultrasonic delay medium. CONSTITUTION:A projection 7a is provided to the inner wall of a protection case 7 so as to correspond to the mount position of an undesired reflection absorbing member 2 of an ultrasonic wave delay medium 1. When the ultrasonic delay medium 1 is contained in a container 6 and a protection case 7 is covered, the projection 7a provided to the inner wall of the protection case 7 chips the undesired reflection absorbing member 2 to hold the ultrasonic wave delay medium 1. Thus, no cushion member is required and the inner size T3 of the container 6 is enough to be the thickness of the ultrasonic wave delay medium 1 and the undesired reflection absorbing member 2, then thin profile is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ultrasonic delay line used in video equipment such as video tape recorders and color televisions.

2. Description of the Related Art Conventionally, this type of ultrasonic delay line has had a configuration as shown in FIG. As shown in the figure, an ultrasonic delay medium 2 to which an unnecessary reflection absorbing material 1 is attached is protected with a cushioning material 3 made of silicone rubber or polymer paper, stored in a storage body 4, and covered with a protective case 5. Ta.

Problems to be Solved by the Invention However, in the above conventional configuration, the unnecessary reflection absorbing material 1
In order to store the ultrasonic delay medium 2 and the cushioning material 3 with the attached ultrasonic delay medium 2, the inner dimension T2 of the storage body 4 must be
Since the combined dimension T of the buffer material 3 and the buffer material 3 needs to be larger, there is a problem in that the ultrasonic delay line cannot be made sufficiently thin.

The present invention solves the above-mentioned conventional problems, and aims to provide a thin and low-cost ultrasonic delay line without the use of a cushioning material.

Means for Solving the Problems To achieve this object, the ultrasonic delay line of the present invention has a structure in which an ultrasonic delay medium housed in a storage body is covered with a protective case having a protrusion on the inner wall. It is.

Function: Since this configuration eliminates the need for a cushioning material, the internal dimensions of the storage body can be reduced, and the ultrasonic delay line can be made thinner.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 1, 1 is an ultrasonic delay medium, 2 is an unnecessary reflection absorbing material, 6 is a storage body, and 7 is a protective case. A protrusion 7 is provided on the inner wall of the protective case 7 to correspond to the mounting position of the unnecessary reflection absorbing material 2 of the ultrasonic delay medium 1.
1L is provided. When the ultrasonic delay medium 1 is stored in the storage body 6 and covered with the protective case 7, the projections 7a provided on the inner wall of the protective case 7 sandwich the unnecessary reflection absorbing material 2, and the ultrasonic delay medium 1 is Hold 1.

FIG. 2 is a perspective view of the protective case 7, showing that the inner wall of the protective case 7 is provided with a projection a.

As described above, by holding the ultrasonic delay medium 1 in the protective case 7, no cushioning material is required, and the internal dimension T5 of the storage body 6 is determined only by the thickness of the ultrasonic delay medium 1 and the unnecessary reflection absorbing material 2. It can be made thinner.

Effects of the Invention As described above, the present invention holds the ultrasonic delay medium with a protrusion provided on the inner wall of the case, and does not use a cushioning material, reducing the number of parts and producing an inexpensive and thin ultrasonic wave. It is possible to realize a delay line.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an ultrasonic delay line according to an embodiment of the present invention, FIG. 2 is a perspective view showing a protective case of the present invention, and FIG. 3 is a sectional view showing a conventional ultrasonic delay line. . 1...Ultrasonic delay medium, 2...Unnecessary reflection absorbing material, 6...Storage body, 7...Case, completed a... Projection, T5...Inner dimensions of the storage body.

Claims (1)

[Claims] An ultrasonic delay line comprising an ultrasonic delay medium, a storage body for storing the ultrasonic delay medium, and a protective case, the unnecessary reflection absorbing material on the ultrasonic delay medium being held between projections provided on the inner wall of the protective case.