JPS625500B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a picture tube support structure that elastically supports a picture tube on an external mounting member.

FIG. 1 shows a support structure for a picture tube that has been widely used in the past. In the figure, a picture tube 1 is supported by an external mounting member 3 via a reinforcing band 2. As shown in FIG. However, in such a configuration, when the picture tube 1 is mounted on an aircraft and the external mounting member 3 is attached to a mounting base in the aircraft, the aircraft having a plurality of specific frequencies is transmitted via the external mounting member 3. The vibrations are transmitted to the picture tube, and the shadow mask 4 of the picture tube 1 resonates at the above-mentioned specific frequency, causing color shift.

In order to overcome this drawback, a support structure as shown in FIG. 2 has been considered. (Tokugansho
54-47795) In the same figure, 5 is picture tube 1.
This is a metal case that covers the outer periphery of the case 5 and also serves as a magnetic shield.
By fixing the picture tube 1 to the external mounting member 3 via the case 5. A holding member 6 made of silicone rubber is inserted between the picture tube 1 and the case 5.
As a result, the picture tube 1 is held in the case 5, and vibrations transmitted from the external mounting member 3 to the case 5 are absorbed. Note that 7 is a rubber filling material that fills the gap between the picture tube 1 and the case 5, and has a smaller elastic modulus than the holding member 6, that is, a lower hardness, and is used to hold the picture tube 1 in the case 5. It does not contribute to retention.

However, in the configuration shown in FIG. 2, when the frequency of the vibration transmitted to the case 5 matches the natural vibration frequency of the holding member 6, the buffering effect of the holding member 6 is lost and the vibration is transmitted to the picture tube 1. There was a problem.

This invention has been made in view of the above-mentioned problems, and the holding member is formed of a plurality of elastic bodies having different elastic coefficients, so that vibrations of any frequency can be absorbed by the holding member 6, and the picture tube It is an object of the present invention to provide a support structure for a picture tube that effectively suppresses the vibration of the picture tube and prevents the occurrence of color shift.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, the holding member 6 inserted between the picture tube 1 and the case 5 extends over almost the entire length of the picture tube 1, and is divided in the circumferential direction as shown in FIG. It consists of three elastic bodies 6A, 6B, and 6C made of silicone rubber. Each of these elastic bodies 6
A, 6B, and 6C have different elastic coefficients, and therefore, the picture tube 1 is held in the case 5 with locally different elastic coefficients along its circumferential direction. A soft filler 7 that does not contribute to holding the picture tube 1 is provided between each of the elastic bodies 6A, 6B, and 6C.
is filled.

In the above configuration, the external mounting member 3 in FIG.
The vibrations transmitted from the to the case 5 are absorbed by the holding member 6 and are not transmitted to the picture tube 1. At this time, the frequency of the vibration transmitted to the case 5 is transmitted to any one of the elastic bodies 6A, 6B, and 6C of the holding member 6.
For example, it matches the natural vibration frequency of the elastic body 6A,
Even if this elastic body 6A goes into a resonance state and loses its buffering effect, the other elastic bodies 6B and 6C, which have different elastic coefficients, that is, different natural vibration frequencies, from the elastic body 6A will not go into a resonance state. Since the buffering effect is maintained, vibrations of the case 5 are effectively absorbed by the holding member 6. Therefore, vibrations of any frequency will be absorbed by the holding member 6.

In addition, in the above embodiment, the elastic bodies 6A, 6B, 6
Although rubber is used as C, it goes without saying that a metal spring may also be used.

As explained above, according to the present invention, vibrations of any frequency are absorbed by the holding member, so transmission of the vibrations to the picture tube is effectively prevented, and as a result, vibrations of the shadow mask are suppressed. , color shift is prevented from occurring.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an example of a conventional picture tube support structure, FIG. 2 is a vertical cross-sectional view showing a conventional picture tube support structure, and FIG. 3 is a vertical cross-sectional view showing an example of a conventional picture tube support structure. The vertical sectional view shown in FIG. 4 is taken along A-A in FIG. 3.
It is a sectional view along a line. 1... Picture tube, 3... External mounting member, 4...
Shadow mask, 5... Case, 6... Holding member, 6A, 6B, 6C... Elastic body. In addition, in the figure,
The same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1 An image receptor in which a holding member and a filler having a lower hardness than the holding member are inserted between the picture tube and a case covering the outer periphery of the picture tube, and the picture tube is supported on an external attachment member via the holding member and the case. In the tube support structure, the holding member is formed of a plurality of elastic bodies that are divided in the circumferential direction of the picture tube and have different elastic coefficients, and the holding member allows the holding member to have different elastic coefficients along the circumferential direction. A support structure for a picture tube, characterized in that the picture tube is held in the case.