JPH075242U - Backlock Static Convergence Magnet Assembly - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a backlock static convergence magnet assembly capable of making the tightening force of the lock ring almost constant. [Structure] The holder 1 is provided with a valley screw at a fixed position, and the lock ring 8 is provided with a thread screw at a fixed position. When the lock ring 8 is rotated and the tightening force becomes stronger,
When the rotation of the lock ring is stopped at a specific position with respect to the cylindrical holder, it can be fixed with a substantially constant tightening force.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a color television receiver, in particular, a static convergence magnet assembly used for an in-line type cathode ray tube, and more particularly to a backlock static convergence magnet assembly having a screw type locking mechanism on the back side. .

[0002]

[Prior art]

 As shown in FIG. 5, a static convergence magnet that magnetically corrects the positional deviation of the R (RED), G (GREEN), and B (BLUE) electron beams is provided at the neck of the in-line cathode ray tube. -The assembly 31 is attached. In the figure, 30 indicates a cathode ray tube. The static convergence magnet assembly 31 is a back lock type, and a screw type lock ring is provided on the side opposite to the face surface of the cathode ray tube 30 (back side).

This backlock static convergence magnet assembly is composed of a cylindrical holder having a stopper and a two-pole convergence magnet for side adjustment of side to magnetically correct positional deviation of R, G, B electron beams, and a side. 4 pole and 6 pole convergence magnets for beam adjustment, ring for preventing co-rotation of 2, 4 and 6 pole convergence magnets, screw lock ring for convergence magnet locking, and attachment to neck of cathode ray tube It consists of a band to do.

Such a backlock static convergence magnet assembly is fixed to the neck portion of the cathode ray tube with a band, and the rotational position of the convergence magnet is adjusted to correct the position deviation of the electron beam, and then the lock ring. Rotate to the left to screw it into the cylindrical holder, press the convergence magnet and ring toward the stopper side and lock to hold the convergence magnet in the adjusted position.

[0005]

[Problems to be solved by the device]

 In the conventional backlock static convergence magnet assembly, the lock ring is tightened by screwing the screw cut on the inner circumference of the lock ring with the screw cut on the outer circumference of the cylindrical holder. However, since the positions of these thread cuts are not constant, the following problems occur.

For example, a primary user attaches a back-lock static convergence magnet assembly to the neck of a cathode ray tube of a color television receiver and adjusts the rotational position of the convergence magnet to correct the electron beam displacement. After that, tighten the lock ring to temporarily fix it. At this time, since the tightening force differs depending on the worker, the lock ring is tightly or loosely tightened on the cylindrical holder.

In such a temporarily fixed backlock static convergence magnet assembly, when the secondary user loosens the locking ring for fine adjustment of the electron beam, the lock ring is tightly tightened. However, there is a problem in that workability is poor because it requires a lot of force to loosen it and makes the operator's finger hard.

An object of the present invention is to provide a backlock static convergence magnet assembly that enables a lock ring to be tightened in a constant tightened state without variation by an operator.

[0009]

[Means for Solving the Problems]

 The present invention fits in the neck part of an in-line type cathode ray tube and includes a cylindrical holder, a part including a plurality of convergence magnets fitted to the cylindrical holder, and a part screwed with the cylindrical holder to lock the part from the back side of the cathode ray tube. In a backlock static convergence magnet assembly having a locking ring for locking and a tightening band for the neck, a valley screw is cut at a fixed position on the outer circumference of the cylindrical holder, and an inner circumference of the locking is provided. The feature is that the thread screw is cut at a fixed position.

Further, the present invention is a cathode-ray tube which is fitted into a neck portion of an in-line type cathode-ray tube and includes a cylindrical holder, a part including a plurality of convergence magnets fitted to the cylindrical holder, and a part screwed with the cylindrical holder. In a backlock static convergence magnet assembly that has a locking ring that locks from the back side of the and a tightening band to the neck, the beginning of the valley screw cut on the outer circumference of the cylindrical holder and the inside of the locking. The feature is that the rotation of the lock ring is stopped by contacting the end of the thread screw cut in the circumference.

[0011]

【Example】

 FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

This backlock static convergence magnet assembly includes a cylindrical holder 1 and a two-pole convergence magnet 2 for side adjustment for magnetically correcting positional deviation of R, G, B electron beams, and a side. 4 poles and 6 poles convergence magnets 3 and 4 for beam adjustment, rings 5 and 6 to prevent co-rotation of 2, 4 and 6 poles convergence magnets, lock ring 8 for convergence magnet locking, It is composed of a band 9 for mounting on the neck portion of the cathode ray tube.

The lock ring 8 has a thread screw 15 cut on the inner periphery thereof, and has convex portions 16 for rotation provided on the outer periphery in four directions orthogonal to each other.

As shown in the vertical sectional view of FIG. 2, the cylindrical holder 1 has a structure in which a cylindrical portion 11 and a flange-shaped stopper 12 at the end of the cylindrical portion 11 are integrated. . Such a holder is manufactured by integrally molding a plastic material or the like.

Further, the outer periphery of the cylindrical portion 11 is cut with a valley screw 13 which is screwed with the mountain screw 15 of the lock ring 8. The outer diameter of the valley screw is formed to be equal to or less than the outer diameter D of the cylindrical portion 11. Further, the cylindrical portion to which the band 9 is attached is composed of a plurality of projecting pieces 14, and the outer shape d formed by the plurality of projecting pieces 14 has a content d < It is set to be D. Therefore, when the convergence magnets 2, 3, 4 and the rings 5, 6, 7 are inserted into the holder 1, the valley screw 13 does not interfere. In addition, when the locking ring 8 is inserted into the holder 1, the protruding piece 14 does not interfere.

Further, in this embodiment, the mountain screw 15 and the valley screw 13 are cut so that the lock ring 8 rotates counterclockwise when it is locked. And, the most important point of the present invention, the threaded screw 15 of the lock ring 8 is cut so that the screw is in a fixed position, that is, the start position and the end position of the screw are in a fixed position. ing. The valley screw 13 of the cylindrical holder 1 is cut so that the screw is in a fixed position, that is, the start position and the end position of the screw are in fixed positions.

By making the position of the thread cutting constant in this way, when the worker rotates the lock ring 8 to a specific position, the lock ring can be temporarily fixed with a constant tightening force.

FIG. 3 shows an example of a specific position of the lock ring for such temporary fixing. FIG. 3 is a view of the assembly as seen from the band 9 side, but only the cylindrical holder 1, the band 9 and the lock ring 8 are shown in order to simplify the drawing. The operator pushes the convex portion 16 of the lock ring with a finger to rotate the lock ring 8 to the left as indicated by the arrow A, and when the tightening force becomes stronger to a certain degree, one convex portion 16 pushes the band 9 into place. When the head 18 of the fixing bolt 17 is reached, the rotation of the lock ring 8 is terminated.

As described above, since the valley screw 13 of the cylindrical holder 1 and the mountain screw 15 of the lock ring 8 are cut at a certain position, if the rotation of the lock ring is stopped at the above-mentioned specific position, it becomes constant. It can be temporarily fixed with the tightening force.

FIGS. 4A and 4B are views showing another embodiment of the present invention. (A) shows the lock ring 8 and (b) shows the cylindrical holder 1.

In this embodiment, the start end 21 of the thread screw 15 of the lock ring 8 and the end 22 of the valley screw 13 of the cylindrical holder 1 are brought into contact with each other so that the rotation of the lock ring is stopped so that the thread and the valley are stopped. It's screwed.

According to this embodiment, when the operator rotates the lock ring and the start end 21 of the thread screw 15 of the lock ring 8 and the end end 22 of the valley screw 13 of the cylindrical holder 1 come into contact with each other, the lock is generated. The ring stops rotating. Therefore, the lock ring can be temporarily fixed with a constant tightening force.

According to the two embodiments described above, when loosening the lock ring 8 for fine adjustment on the secondary user side, the lock rings are temporarily fixed with a substantially constant tightening force for all products. , Workability becomes extremely good.

[0024]

[Effect of device]

 The backlock static convergence magnet assembly of the present invention can fix the lock ring with a substantially constant tightening force, so that when loosening the lock ring again for fine adjustment, the difference in strength of the tightening force is reduced. Since it does not exist, it has the effect of improving workability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the holder shown in FIG.

FIG. 3 is a diagram for explaining tightening of a lock ring.

FIG. 4 is a view showing another embodiment of the present invention.

FIG. 5 is a view showing a state where a backlock static convergence magnet assembly is attached to a neck portion of a cathode ray tube.

[Explanation of symbols]

 1 Cylindrical holder 2, 3, 4 Convergence magnet 5, 6, 7 Co-rotation prevention ring 8 Lock ring 9 Band 11 Cylindrical part 12 Stopper 13 Valley screw 14 Projection piece 15 Mountain screw 16 Convex part 17 Bolt 18 Bolt head 21 Mountain Screw start end 22 Valley screw end

Claims (2)

[Scope of utility model registration request] 1. A cylindrical holder, a part including a plurality of convergence magnets fitted into the neck part of a cathode ray tube, the part including a plurality of convergence magnets, and a part screwed with the cylindrical holder to attach the part from the back side of the cathode ray tube. In a backlock static convergence magnet assembly having a locking lock ring for locking and a tightening band to the neck part, a valley screw is cut at a fixed position on the outer periphery of the cylindrical holder, and a fixed position is provided on the inner periphery of the locking member. Backlock static convergence magnet assembly featuring threaded threads on the back. 2. A inline cathode ray tube fitted with a cylindrical holder, a part including a plurality of convergence magnets fitted into the cylindrical holder, and a part screwed with the cylindrical holder to attach the part from the back side of the cathode ray tube. In a backlock static convergence magnet assembly having a locking lock ring for locking and a tightening band to the neck, a starting end of a valley screw cut on the outer circumference of the cylindrical holder and a mountain cut on the inner circumference of the locking. A backlock static convergence magnet assembly characterized by stopping the rotation of the lock ring when it abuts the end of the screw.