JPS6339886Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial fields of use Display devices such as personal computers and word processors use electron beams that are narrowly focused, so rasters are inevitably distorted into a pink distortion shape. The present invention relates to a magnetic holder structure in a device for correcting such raster distortion.

(B) Prior art In FIG. 1, 5 indicates a magnet holding part 7 that rotatably holds a magnet 6, a connecting part 8,
Attachment part 9 shaped to follow the circumferential surface 4 of the front enlarged cylindrical part 3 of the coil separator 2 of the deflection yoke 1
and a cylindrical spring member 13, the magnetic holder 5
As shown in FIG. 2, one each is provided at each of the four corners of the enlarged cylindrical portion 3, and serves to correct raster pink distortion distortion.

Attachment and sliding of this holder 5 to the deflection yoke is achieved by inserting screws 11, 11 into holes 10, 10 formed in the circumferential surface 4 of the front enlarged portion 3 of the coil separator 2, through elongated holes 12, 12 in the sliding portion. It is done by applying.

That is, the holder 5 is slid in the circumferential direction with the screws 11, 11 loosened, and the screws are tightened at the optimum position to fix the holder 5. The holding portion 7 of the magnet 6 is held firmly by a spring member 13, and is prevented from coming off upward by stopper pieces 14, 14. The rotation of the magnet 6 can be adjusted by inserting a jig into a hole 15 formed in the center and rotating it. 16,16 is toroidal core half 1
Vertical deflection coil wound on 7,17, 18,1
8 is a centering magnet. As mentioned above, the conventional magnet holder has a cylindrical magnet 6 and a magnet holding part 7 of two holder halves.
The magnet 6 is elastically held by a spring member 13 provided around the magnet 6, and a constant rotational torque is applied to the magnet 6. However, in this case, the cylindrical spring member 13 is in the shape of a cylindrical plate as shown in the figure, which increases the parts processing cost and makes it difficult to assemble the spring member 13 into the magnet holding part 7. There is.

(c) Purpose of the invention In view of the above points, the present invention proposes a magnetic holder with a simple and low-cost spring member.

(d) Structure of the device A fork-shaped bent portion extending outward is provided at the end of the semi-cylindrical portion that holds the outer periphery of the magnet, and a linear spring member is applied to the fork-shaped bent portion. Features.

(e) Embodiment In FIG. 2, reference numerals 20 and 20 denote a semi-cylindrical portion 21 that holds the outer periphery of the cylindrical magnet 6, and a bifurcated bent portion 22 that extends outward at its end.
and a mounting portion 23 for the deflection yoke, and 24 is a linear spring member provided in the notch 22a of the fork-shaped bent portion 22. FIG. 3 shows a case where the magnetic holder 6 is mounted on a deflection yoke. Furthermore, the first
The same parts as in the figure are given the same symbols. Third
In the figure, 25, 25 is the enlarged cylindrical part 3 or the collar 2
These are a pair of presser protrusions protruding from a portion near the enlarged cylindrical portion 3 of 6, and ribs 27 are formed on the inner surface thereof to abut against a collar 26, as shown in FIG.
This rib 27 is the attachment part 2 of the magnetic holder.
3 and prevents the magnetic holder from coming out in the radial direction. Reference numeral 29 denotes a notch provided corresponding to the presser protrusions 25, 25, and a part thereof has engagement protrusions 30, 30 for fixing the presser protrusions 25, 25 in a bent state. are doing. On the other hand, the holding protrusion 25 has the engaging protrusion 3
Although a protrusion 31 is formed to engage with the engagement protrusion 30, the upper surface of the engagement protrusion 30 may be directly engaged with the engagement protrusion 30 without providing the protrusion 31.

The magnetic holder held between the presser protrusion 25 and the collar 26 connects the presser protrusion 25 to the engagement protrusion 3.
Adjust without fixing it by 0. After the adjustment is completed, the magnetic holder is firmly fixed by bending the presser protrusion 25 and engaging the distal end thereof with the engagement protrusion 30.

Note that the filament clamp member 24 is attached to the semi-cylindrical portion 2.
When locking the forked portion 22 of No. 1,
It is preferable to use a jig 32 as shown in the figure. Moreover, as shown in FIGS. 6 and 7, the linear spring member 24 may have an insertion hole 33 for inserting the jig 32 in advance.

(f) Effects of the invention According to the invention, a spring member provided on the outer periphery of the semi-cylindrical part of the holder in order to impart torque to the magnet when holding the cylindrical magnet is provided at the end of the semi-cylindrical part. Since the structure is such that a loop-shaped wire is applied to the concave notch of the bifurcated bent portion provided so as to extend outward, the spring member can be easily constructed, and the magnetic holder can be easily configured. This has the effect of making assembly easier. Another advantage is that the rotational torque of the magnet can be made moderate.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional magnetic holder. FIG. 2 is an exploded perspective view of a magnetic holder embodying the present invention. 3 is a perspective view showing the magnetic holder shown in FIG. 2 attached to a deflection yoke, and FIG. 4 is a perspective view showing a main part of FIG. 3 with a portion thereof cut away. FIG. 5 is a diagram showing a method of assembling the magnetic holder. 6 and 7 are perspective views showing embodiments of parts used in the magnetic holder of the present invention. 1... Deflection yoke, 6... Magnet, 20...
... Holder half body, 21 ... Semi-cylindrical part, 22 ... Bifurcated bent part, 22a ... Notch, 23 ... Attachment part, 24 ... Linear spring member.

Claims (1)

[Scope of utility model registration request] A magnet holder that holds a magnet for raster distortion correction attached to a deflection yoke includes a semi-cylindrical part that holds the outer periphery of the cylindrical magnet, and a bifurcated bend extending outward at the end thereof. and a mounting portion attached to the deflection yoke to surround the magnet, and a loop-shaped linear spring member is provided in the recess of the fork-shaped bent portion. A raster distortion correction magnetic holder featuring: