JPH037876Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for fixing an electron beam adjustment device used by being fixed to a picture tube of a television receiver, and for fixing a magnet after adjusting the electron beam.

[Problems to be solved by conventional techniques and ideas] In the conventional electron beam adjusting device, a metal band and screws were used to fix it to the picture tube.

Additionally, a separate screw-type fixing ring was used to fix the magnet after beam adjustment.

In this way, the structure uses a variety of separate parts to fix the main body of the electron beam adjustment device to the picture tube and to fix the magnet, which requires a large number of parts, which inevitably increases costs. There were drawbacks such as the need for a tool such as a screwdriver to fix it.

Therefore, in the present invention, a fixing ring made of synthetic resin is used to simultaneously tighten the picture tube and fix the magnet, thereby omitting many parts including the metal bands and screws mentioned above. It is.

[Means for Solving the Problem] As a means for achieving the problem, the present invention provides a plurality of ring-shaped magnets 5 on the outer periphery of a cylindrical holder 3 that is attached to the picture tube neck portion 4 of a television receiver. In the electron beam adjusting device, an elastic protruding piece 3c is integrally formed on the outer peripheral edge of the cylindrical holder 3, and an elastic protruding piece 3c is provided protruding in the axial direction from the inner circumferential edge of the elastic protruding piece 3c, and the elastic protruding piece 3c is provided on the outside of the picture tube neck part 4. an elastic engagement projection piece 3a having an inclined surface 3b which is formed to be thicker toward the tip; and an elastic engagement projection piece 3a that is rotatably attached to the outside of the elastic engagement projection piece 3a and gradually deepens in the circumferential direction. A first fixing ring 1 that engages with the mating protrusion piece 3a and has an inclined surface 1a on its inner diameter surface, and an elastic protrusion piece 3c that is outside the elastic engagement protrusion piece 3a and the first fixing ring 1
and a second fixing ring 2 which is rotatably attached between the fixing ring 2 and the second fixing ring 2, which abuts the elastic protruding piece 3c and has a side surface of an arcuate inclined surface 2a that gradually deepens in a certain direction.

Further, in a preferred embodiment, the first fixing ring and the second fixing ring are made of synthetic resin.

[Example] The present invention will be specifically described below with reference to the drawings.

Figures 1 and 2 show a cylindrical holder A with a male thread formed on the outer periphery, a plurality of ring-shaped magnets B, a plurality of ring-shaped spacers C, and a cylindrical holder A with a male thread formed on the outer periphery of a general conventional electron beam adjustment device. It consists of a fixing ring D with a female thread and a metal band F with a screw E.

In this conventional electron beam adjustment device, the picture tube G
A metal band F and screw E are used to tighten the screws.

In addition, to adjust the electron beam, the ring-shaped magnet B is rotated and adjusted, but in order to prevent the ring-shaped magnet from moving due to vibration etc. after adjustment and causing the adjustment to go awry, a female thread is formed on the inner diameter surface. The fixing ring D is rotated, and the ring-shaped spacer C and the magnet B are pressed and fixed by the action of its female screw and the male screw of the cylindrical holder A.

Therefore, because separate parts are used to fix the picture tube and the ring-shaped magnet, the number of parts increases, and tools such as screwdrivers must be used to fix the picture tube. It was a structure.

In the present invention, as shown in FIGS. 3 and 4, the first fixing ring 1, which is molded from synthetic resin and has an inclined surface 1a on its inner diameter, is rotated clockwise in the example shown in the figure.
By rotating the angle within 90 degrees, the elastic engagement projection piece 3a is closed by the action of the inclined surface 1a of the first fixing ring and the inclined surface 3b of the elastic engagement projection piece 3a of the cylindrical holder 3. Tighten to hold this electron beam adjustment device.

In this state, after completing the electron beam adjustment by rotating the ring-shaped magnet, the second fixed ring 2, which has an inclined surface 2a on one side, is rotated clockwise within an angle of 90 degrees in the example shown in this figure. Therefore, the elastic projecting piece 3c, which is integrated with the cylindrical holder 3 and has a projection, is first pressed against the side surface of the ring-shaped magnet 5 by the action of the inclined surface 2a. The ring-shaped magnet 5 and the ring-shaped spacer 6 are pressed and fixed between a hook portion 3d integrated with the cylindrical holder 3.

When the second fixing ring 2 is further rotated from this state, the second fixing ring 2 is pushed parallel to the first fixing ring 1 side in the axial direction by the reaction of pushing the elastic protruding piece 3c having a protrusion. Therefore, the first fixing ring 1 is also pushed in the direction in which the thickness of the divided piece 3a in the axial direction increases.

Therefore, the inclined surface 1a of the inner diameter part of the first fixing ring 1 and the elastic engagement projection piece 3a of the cylindrical holder 3
By closing the elastic engagement protrusion piece 3a by a wedge action with the inclined surface 3b provided in the picture tube, the picture tube can be further tightened, and the present electron beam adjusting device can be reliably fixed to the picture tube.

According to the electron beam adjustment device of the present invention, compared to conventional metal bands, it can be easily produced by injection molding from synthetic resin, and can be tightened and fixed to the picture tube 4 of a television receiver and fixed to the ring-shaped magnet 5. Since one second fixing ring serves as the second fixing ring, the number of parts can be reduced.

In addition, the adjustment device of the present invention does not require tools such as screwdrivers as in conventional methods, and can easily and reliably receive images by simply rotating the two first and second fixing rings by several tens of degrees with bare hands. It has the great advantage of being able to be fixed to a tube.

It is clear from FIGS. 3 and 4 that the rotation direction and rotation angle of the first and second fixing rings can be changed depending on the design of each ring.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional perspective view of a conventional electron beam adjustment device, Fig. 2 is an exploded view of its parts, Fig. 3 is a perspective view of the electron beam adjustment of the present invention, and Fig. 4 is an exploded view of its parts. . In the figure, 1...first fixing ring, 1a...slanted surface of first fixing ring, 2...second fixing ring, 2a
...Slanted surface of second fixing ring, 3... Cylindrical holder, 3a... Resilient engagement protrusion piece, 3b... Slanted surface of elastic engagement protrusion piece, 3c... Elastic protrusion piece having a protrusion, 3d... ... Hook part, 4 ... Part of the picture tube of a television receiver, 5 ... Ring-shaped magnet, 6 ...
ring spacer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an electron beam adjusting device provided with a plurality of ring-shaped magnets 5 on the outer periphery of a cylindrical holder 3 used by being attached to a picture tube neck portion 4 of a television receiver, An elastic protruding piece 3c integrally formed on the outer peripheral edge of the holder 3, and an elastic protruding piece 3c protruding from the inner circumferential edge of the elastic protruding piece 3c in the axial direction, located on the outside of the picture tube neck part 4, and becoming thicker toward the tip. An elastic engagement protrusion piece 3a having a formed inclined surface 3b engages with the elastic engagement protrusion piece 3a which is rotatably attached to the outside of the elastic engagement protrusion piece 3a and gradually deepens in the circumferential direction, and is inclined. a first fixing ring 1 having a surface 1a on its inner diameter surface; and a first fixing ring 1 rotatably attached between the elastic protruding piece 3c and the first fixing ring 1 on the outside of the elastic engagement protrusion piece 3a, and the elastic protrusion An electron beam adjustment device comprising: a second fixing ring 2 that abuts the piece 3c and has an arcuate inclined surface 2a on its side surface that gradually deepens in a certain direction; (2) The electron beam adjusting device according to claim 1, wherein the first fixing ring and the second fixing ring are made of synthetic resin.