JPS6231971Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a deflection yoke for an image pickup tube used in a television camera.

A conventional deflection yoke for an image pickup tube is formed into a cylindrical shape by incorporating a deflection coil, an alignment coil, and a magnetic seal plate into a coil bobbin so that the image pickup tube 1 can be housed therein, as shown in FIG. A flange 3 is formed at the front and rear of the flange 3, and a deflection yoke support 4, which is fixed to a television camera, is connected to the flange 3 with screws 5. In addition,
6 in the figure is a tightening screw for fixing the image pickup tube 1 and the deflection yoke 2. As shown in FIG.

With this configuration, after the rotational positions of the image pickup tube 1 and the deflection yoke 2, which have a built-in striped filter, etc., and the rotational positions of the deflection yoke 2 and the TV camera are roughly aligned, the images are displayed on a monitor TV camera or an oscilloscope. After making precise adjustments alternately and separately while making observations, the screws were fixed by tightening the tightening screws 6 and 5, but the adjustment was extremely troublesome and difficult to handle.

For this reason, as shown in Figure 2, the tsuba 3
A system has also been developed in which a protrusion 7 is provided in a part of the deflection yoke support 4 and the projection 7 is fitted into the recess 8 of the deflection yoke support 4 to regulate the rotational position of the deflection yoke 2 and the television camera. The installation error of the deflection coil provided inside the deflection yoke 2 directly results in an error in the rotation angle between the deflection yoke 2 and the television camera, resulting in an inconvenience. For example, in order to maintain rotational position accuracy within ±1.5°, the deflection yoke 2 must be assembled with high precision, resulting in a poor product yield for the deflection yoke 2.

The present invention eliminates the above-mentioned drawbacks of the prior art.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 6.

First, the embodiment shown in FIGS. 3 and 4 will be described. Reference numeral 9 denotes a coil bobbin formed into a cylindrical shape into which an image pickup tube is fitted, and provided with flanges 10 and 11 at both ends. , an alignment coil is wound, and a magnetic shield plate 12 is further wound around the outer periphery of the alignment coil.

An electrical contact 13 is drawn out from the front flange 10 to guide electrical signals from the image pickup tube. Further, a protrusion 14 is provided on the peripheral surface of the rear collar 11, and an annular body 15 is fitted therein. This annular body 15 is provided with a long hole 16, into which the protrusion 14 is fitted. Furthermore, a protrusion 17 is provided on the outer circumferential surface of the annular body 15 to be positioned on a deflection yoke support that is coupled to a television camera.

By providing the protrusion 17 on the annular body 15 in this way, the angle of the deflection direction by the deflection coil with respect to the protrusion 17 can be adjusted using the elongated hole 16 during the deflection yoke assembly process.
The position of the protrusion 14 is controlled and precisely adjusted, and after adjustment, adhesive is injected into the elongated hole 16 and solidified to fix the coil bobbin 9 and the annular body 15. To install the protrusion 17 into a television camera, attach the protrusion 17 to the deflection yoke. The rotation angle of the deflection yoke can be adjusted correctly simply by fitting it into the recess of the support base, eliminating the need for any detailed adjustments.

Next, the embodiment shown in FIGS. 5 and 6 will be described.

18 is a coil bobbin made of synthetic resin or the like in a cylindrical shape and having a flange 19 at the front end;
A deflection coil 20 is wound around this coil bobbin 18 . An annular body 22 having a rear flange 21 is coupled to the rear end of the coil bobbin 18.
An alignment magnet 23 is attached to this annular body 22.
is rotatably incorporated.

A magnetic shield plate 24 is wound between the front flange 19 and the rear flange 21 so as to cover the deflection coil 20.

Further, a recess or a through hole 25 is provided in a part of the circumferential surface of the rear flange 21, and this recess or through hole 25
is for fitting and fixing with the protrusion of the deflection yoke support.

In this configuration, the coil bobbin 18 is rotated with reference to the recess or through hole 25 of the annular body 22 to adjust the deflection direction angle by the deflection coil 20, and then the coil bobbin 18 and the annular body 22 are bonded with adhesive, and the television camera If the deflection yoke is attached using the recess or through hole 25, the rotation angle of the deflection yoke can be adjusted correctly.

In addition, when the through hole 25 is provided, this through hole 25
It can be used to supply adhesive from.

With this configuration, the coil bobbin 18 and the annular body 22 can be easily molded, and even when assembled, the deflection coil 20 can be assembled into the coil bobbin 18 and the alignment magnet 23 can be assembled into the annular body 22 separately.
This has the advantage of simplifying assembly.

Since the deflection yoke for an image pickup tube of the present invention is constructed as described above, a protrusion, a recess, or a through hole is provided in the annular body to regulate the rotation angle of the deflection yoke when combined with a television camera, and the deflection coil of the coil bobbin is By adjusting and fixing the rotational position of the camera, it is possible to assemble it into the TV camera very easily and accurately, and it has great practical value as it has excellent performance and is easy to handle. It is what it is.

[Brief explanation of the drawing]

1 and 2 are perspective views showing how a conventional deflection yoke for an image pickup tube is used, FIG. 3 is a perspective view showing an embodiment of the deflection yoke for an image pickup tube according to the present invention, and FIG. 4 is a side view of the same. FIG. 5 is a perspective view showing another embodiment, and FIG. 6 is a sectional view thereof. 9... Coil bobbin, 10, 11... Tsuba, 12
... Magnetic shield plate, 14 ... Convexity, 15 ... Annular body, 16 ... Long hole, 17 ... Projection, 18 ... Coil bobbin, 19 ... Tsuba, 20 ... Deflection coil,
21... Rear flange, 22... Annular body, 23... Alignment magnet, 24... Magnetic shield plate, 2
5...Recess or through hole.

Claims (1)

[Scope of utility model registration request] In a deflection yoke for an image pickup tube that is constructed by incorporating a deflection coil, an alignment coil or an alignment magnet, and a magnetic shield plate into a coil bobbin, a part of the collar of the coil bobbin has a protrusion, recess, or through hole that is fixed to a television camera. A deflection yoke for an image pickup tube, comprising: an annular body having a long hole that fits into a protrusion provided on the flange of the coil bobbin;