JPS6063861A - Pickup tube device - Google Patents

Abstract

PURPOSE:To prevent rotation of a pickup tube by making the constitution in such a way that the engagement portion formed on the band side for determining a position in a rotating direction and preventing rotation, is allowed to fit the portion for determining a position of concave or convex shape provided in the coil bobbin. CONSTITUTION:The concave portions 13 for determining a position are provided at the position of clamping point of a band 10, when clamping the band 10 with a screw 12, on both sides of a groove 11 for mounting the band 10 of a coil bobbin. A rubber ring 14 is previously mounted in the groove 11 of the coil bobbin 9, and next the band 10, in which the convex portion 15 for engaging is formed in the clamping point of the band 10, is mounted in the groove 11 and the screw 12 is mounted at both ends of the band 10. Next a pickup tube 16 is inserted into a bobbin 9 and the band 10 is clamped by the screw 12 after the position in the rotating direction of the coil bobbin 9 and the pickup tube 16 is adjusted. The pickup tube 16 is fixed to the coil bobbin 9 by means of the clamping, through the rubber ring 14 being inscribed with the band 10.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an image pickup tube device.

Conventional configuration and its problems When fixing the image pickup tube to the deflection yoke with a band,
Conventionally, the arrangement was as shown in FIGS. 1 to 3. That is, a protrusion 3 is provided on the edge of a groove 2 provided in a coil bobbin 1, and this protrusion 3 positions the hand 4 in one direction of rotation and prevents the band 4 from rotating when the band 4 is tightened with a screw 5. .

However, the width a of the protrusion 3 is the minimum value of the spacing because the distance between the engaging pieces 6°7 of the hand 4 that engages with the protrusion 3 varies depending on the state before and after tightening with the screw 5. It is necessary to For this reason, the gap between the later tightening and the front tightening was larger than the width a, so the positioning in the rotational direction was not perfect, and the rotation of the band 4 and the image pickup tube 8 was not sufficiently prevented when the tightening was done. OBJECT OF THE INVENTION The present invention obviates such conventional drawbacks.
The purpose is to prevent rotation of the image pickup tube by positioning the band in the rotational direction and preventing the band from rotating when tightening the hand with a screw.

Structure of the Invention This invention provides a concave or convex positioning portion formed on the coil bobbin side at a position that is the fulcrum of the hunt to be tightened with a screw, and a convex or concave shape for rotation direction positioning and rotation prevention formed on the band side. The structure is such that the shaped engaging portions fit together. With this configuration, positioning in the rotational direction is determined only by the degree of engagement of the positioning part provided on the coil bobbin side, and tightening on the hand side is determined only by the degree of engagement of the engaging part formed on the fulcrum part, resulting in good positioning accuracy. /< When the hand is tightened, there is no rotation of the hand (and the position of the screw does not move. Also, the rubber ring inscribed in the hand does not rotate, so the image pickup tube is inscribed in the rubber ring and tightened. The rotation of will also be eliminated.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIGS. 4 to 6. In the figure, reference numeral 9 indicates how to install the hand 10 by tightening the hand 10 with screws 12 on both sides of the groove 11. When tightening the pan F' 10, position the four positioning parts 13 at the fulcrum (the center of the hand 10). This is a coil bobbin with a This coil bobbin 9
The comb ring 14 is first installed in the groove 11, and then the hand 10 is tightened using the hand 1, which has an engagement protrusion 15 formed at the fulcrum.
0 is attached to the groove 11, and screws 12 are attached to both ends of the band 10 and tightened. At this time, when tightening the band IO, it is necessary to make the gap C wide so that the image pickup tube 16 can be easily inserted. Next, the image pickup tube 16 is inserted into the bobbin 9, and after adjusting the rotational position of the coil bobbin 9 and the image pickup tube 16, screws 12 are used to fix the image pickup tube 16 to the coil bobbin 9.
Tighten hand 10 with. With this tightening, the hand 10
The imaging tube 16 is fixed to the coil bobbin 9 via a rubber ring 14 inscribed in the coil bobbin 9 .

In this way, the positioning of the hand 1O in the rotational direction is determined by the alignment of the concave portion 13 of the bobbin 9 and the convex portion 15 of the band 10, and since these are located at the fulcrum for tightening the hand 10, the positioning accuracy is good. , the variation in the position of the hiss 12 is reduced. Also, when the hand 10 is tightened with the screw 12, the rubber ring 1
Since the rotation of 4 does not occur, the image pickup tube 16 also does not rotate. Further, the convex portions 15 of the pan I''IO may be provided on both sides of the hand 10, but one side is sufficient for positioning and prevention of rotation.
The retaining pieces 6.7 of the conventional example shown in FIG. 1 are no longer necessary, the press mold is simplified, and the material yield is improved. The reason why the bobbin 9 has two recesses 13 is to allow the hand 10 to be attached in any direction. Note that the concave portion 13 may be replaced with a convex portion, and the convex portion 15 may be replaced with four portions.

Effects of the Invention As described above, in the image pickup tube device of the present invention, when the image pickup tube is inserted into the bobbin and fixed with the hand after positioning in the rotational direction, the hand is tightened by engaging the bobbin at the fulcrum. There is little variation in position and it does not move in the rotational direction, making it easy to tighten the hiss with a screwdriver. Furthermore, since the band does not rotate when the belt is tightened, the image pickup tube does not rotate, thereby eliminating the need to repeat the positioning and fixing work in the rotational direction many times.

[Brief explanation of drawings]

Fig. 1 shows a part of the conventional example, Fig. 1(a) is a plan view, Fig. 1(b) is a sectional view of the groove, Fig. tc+ is a bottom view, Fig. 2 shows a coil bobbin, and Fig. 2(a) is a plan view. al is a plan view, the same figure (bl
is a cross-sectional view of the groove; Showing an embodiment of the invention,
Figure (a) is a plan view, figure (bl is a cross-sectional view of the groove, figure F
C+ shows the bottom view, Fig. 5 shows the coil bobbin, and the same figure (a
) is a plan view, the same figure (bl is a sectional view, the same figure (C1 is a bottom view, FIG. 6 shows the hand,
bl is a side view, and the figure (C1 is a bottom view).

Claims (2)

[Claims] (1) an image pickup tube; a coil bobbin that houses the image pickup tube and has a groove formed on its circumferential surface for attaching a hand; a convex or concave positioning portion provided on the edge of the groove for attaching the hand; An image pickup tube device comprising a tightening hand that is fitted into a groove and has an engaging portion on a tightening fulcrum portion that engages with the positioning portion. (2) The image pickup tube device according to claim (1), wherein the positioning portion is formed on both sides of the groove edge of the groove for attaching the hand.