JPH0119321Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a deflection coil bobbin in a yoke assembly for an image pickup tube.
The purpose of this invention is to provide a deflection coil bobbin for an image pickup tube that is compatible with a yoke assembly for an image pickup tube and an image pickup tube, by attaching a magnet ring for alignment adjustment to different electrode positions depending on the specifications of the image pickup tube to be inserted. be.

Conventionally, the image pickup tube inserted into the image pickup tube yoke assembly was a 2/3-inch tube with a total length of glass tube (from the rear surface of the target ring to the rear end of the glass tube) of 86 mm.
The distance from the rear surface of the target ring to the third grit was approximately 60mm, and all image pickup tube manufacturers were producing general image pickup tubes. However, with the recent spread of hand-held cameras, the purposes for which they are used have diversified, and high-resolution image pickup tubes are generally required. Against this background, image pickup tube manufacturers are using 2/3-inch tubes with longer overall lengths and increasing the overall length of the tubes from the rear of the targeting ring. from to the rear end of the glass tube.
At 100mm, the distance from the back of the target ring to the third grit was extended to reduce beam landing errors and improve resolution. However, the longer size of the image pickup tube manufacturers mentioned above has increased the overall length of the glass tube.
The distance from the rear surface of the target ring to the third grit differs depending on the manufacturer. For example, as shown in Figure 1, there is a large difference in the position of the third grit, 72.7mm for Hitachi and 78mm for Matsushita. However, on the coil bobbin of the yoke assembly into which the image pickup tube is inserted, an alignment adjustment magnetic ring is rotatably fitted on the outer periphery near the rear end of the cylinder and at an optimal position corresponding to the third grid of the image pickup tube to be inserted. Since the alignment adjusting magnet ring, which is rotatably fitted to the coil bobbin, cannot be moved and placed in the axial direction of the coil bobbin, the yoke assembly manufacturer has to adjust the alignment for each image pickup tube manufacturer. It is necessary to create a coil bobbin with a different fitting position for the adjustment magnet ring. In addition, there is a drawback in that TV camera users lose compatibility when replacing image pickup tubes, resulting in a great economic loss.

The present invention takes into consideration the compatibility between the image pickup tube and the image pickup tube yoke assembly, and the alignment adjustment magnet rings are installed at multiple locations in parallel in the axial direction on the outer periphery near the rear end of the deflection coil bobbin. The present invention provides a deflection coil bobbin for an image pickup tube that allows an alignment adjustment magnet ring to be arbitrarily fitted to an optimal position corresponding to the third grit of the image pickup tube.

Hereinafter, an embodiment of a deflection coil bobbin for an image pickup tube according to the present invention will be described with reference to FIG.

The present invention is an improvement of means for fitting (rotatably) a magnet ring for alignment adjustment at the rear end portion of a deflection coil bobbin for an image pickup tube. The front end direction is omitted.

FIG. 2 shows a rear perspective view of a deflection coil bobbin for an image pickup tube, 1 is a coil bobbin, 2 is a rear flange,
3 indicates a rear end tube extending rearward from the rear collar 2. One end is separated from the rear end cylinder 3 by a notch 4 in the cylinder wall 3' of the rear end cylinder 3 from the rear flange 2 to the rear axis direction by about 1/2 of the total length, and the other end is separated from the rear end cylinder 3 to form a free end. A tongue piece 5 connected to the collar 2 is provided, and short locking pieces 7, 7 formed by bending the tip of the tongue piece 5 into a key shape to form a locking protrusion 6 are attached to the rear end tube 3. The long locking piece 11 is arranged to face the peripheral surface of the cylinder wall 3', and the long locking piece 11 is a short locking piece provided opposite to the peripheral surface of the cylinder wall 3' of the rear end cylinder 3. It is placed in the middle position between pieces 7, 7,
The long locking piece 11 has notches 8, 8 on both sides from the rear flange 2 to the rear end 3'' of the rear end tube 3, one end is connected to the rear flange 2, and the tip is free to form a tongue piece 9. A locking protrusion 10 is formed by bending the tip of the tongue piece 9 to constitute the deflection coil bobbin 1 for an imaging tube according to the present invention.

As described above, the image pickup tube deflection coil bobbin 1 of the present invention is configured such that the alignment adjustment magnet ring mounting portion is shifted in the axial direction in two stages, so that the longer image pickup tube is positioned at the third grit position. Even if there is a large difference between the two, if you use the same bobbin and, for example, a Matsushita image pickup tube, lock the alignment adjustment magnet ring to the long locking pieces 11, and use the Hitachi image pickup tube. When using the magnet ring, the short locking pieces 7 can be used to lock the magnet ring for alignment adjustment, so that the locking position of the magnet ring can be arbitrarily selected according to the specifications of the image pickup tube. .

Therefore, it is no longer necessary to separately manufacture a deflection coil bobbin to match the image pickup tube used.

[Brief explanation of the drawing]

FIG. 1 is a side view of the image pickup tube showing dimensions up to the third grit. FIG. 2 shows a rear perspective view of the deflection coil bobbin for an image pickup tube according to the present invention. 1: Deflection coil bobbin for image pickup tube, 2: Back tsuba,
3: Rear end tube, 4, 8: Notch, 5, 9: Tongue piece, 6,
10: Locking protrusion, 7: Short locking piece, 11: Long locking piece.

Claims (1)

[Scope of utility model registration request] In a deflection coil bobbin for an image pickup tube, which is composed of a cylinder body in which a deflection coil is wound on the outer diameter surface and an image pickup tube is inserted into the inner diameter of the cylinder, the cylinder body has a deflection coil bobbin that protrudes at multiple points on the outer periphery of the rear end of the cylinder part and has a length in the rear (axial) direction. Different short locking pieces and long locking pieces are arranged at arbitrary intervals along the rear end cylindrical portion, and magnetic ring locking means for alignment adjustment is provided at a plurality of locations, and the image pickup tube to be inserted is A deflection coil bobbin for an image pickup tube, characterized in that a magnet ring for alignment adjustment is locked by selecting an optimal position corresponding to different electrode positions depending on specifications.