JPS6314370Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a deflection yoke device installed in the neck portion of a cathode ray tube. This invention relates to a deflection yoke device in which the pieces are securely fixed so that they work effectively.

The above magnetic piece is placed on the front flange of the coil separator that separates the horizontal coil and the vertical coil, but its purpose is to allow two vertical coils to be solenoid-wound around each curved fan-shaped ferrite core. Therefore, when the end faces of each core are combined into a truncated cone shape and combined with a saddle-shaped horizontal coil via a coil separator, magnetic flux is prevented from leaking from the joint of the core end faces, and deflection pincushion distortion of the screen is prevented. This is to ensure that it is corrected correctly.

Technical Background of the Invention For this reason, it is desirable that the magnetic piece be securely attached around the front flange portion of the coil separator. Therefore, conventionally, notches 3, 3 were provided in the legs 2, 2 of the magnetic piece 1 shown in FIG. It is set up. Furthermore, as shown in the enlarged cross-sectional view of FIG. The positioning is done in the axial direction. Thus, this magnetic piece 1 is placed on the coil separator 4.
If you attach the necessary parts and attach it, the third
A deflection yoke device as shown in the figure can be constructed.

Figure 3 shows two-part coil separators 4, 4 fitted together, horizontal coils 8, 8 on the inside and vertical coil 1 wound around ferrite cores 9, 9 on the outside.
FIG. 2 is a perspective view of a conventional deflection yoke device in which the coils 0 and 0 are attached, and the winding wires of both coils extend from the terminal plate portion 11 at the rear. The magnetic pieces 1, 1 are arranged on the side of the core parts 9, 9 where the vertical coils 10, 10 are not wound, and pick up magnetic flux leaking from the core parts 9, 9. A cathode ray tube (not shown) is inserted from the front enlarged part of this device and is inserted into the rear cylindrical part 1.
The neck part will protrude from 2.

Problems with the Background Art However, the magnetic piece 1 is generally made of a cold-rolled silicon steel strip, and its final shape is formed by press working from a flat plate, but this causes variations in the mechanical elongation of the material and press working. There was a problem that the position of the cut 3 was not constant due to variations in time.

Therefore, the position of the cut 3 in the part where the magnetic piece 1 joins the coil separator 4 is determined by the dimension A from the stepped part to the elastic protrusion 6 of the coil separator 4.
It has to be larger than the position of the inner engaging claw 7, and therefore, there is a risk of creating a gap B in the circumferential plane part 13 where the front flange part 5 of the coil separator 4 and the magnetic piece 1 are in contact. . For this reason,
The magnetic piece 1 wobbles in the axial direction of the cathode ray tube, making it impossible to correct screen pincushion distortion correctly.

Therefore, a fixing claw 14 is provided in the middle of the legs 2, 2 of the magnetic piece 1 as shown in FIG. Protruding claws 15, 15 similar to the elastic protrusion 6 may be provided, and the fixing claw 14 may be fitted between the protruding claws 15, 15, and this portion may ultimately be fixed with adhesive. However, since this fixing claw 14 does not take part in correcting needle winding distortion, which has a complicated shape, it cannot be said to be a wise means for stabilizing the magnetic piece 1.

In this way, conventionally, the flat part 13 of the flange part 5 is fixed to the front flange part 5 of the coil separator 4 so that the magnetic piece 1 fixed to the front flange part 5 does not move in the axial direction of the cathode ray tube.
In order to attach the magnetic piece 1 and the leg part of the magnetic piece 1 in close contact with each other, it is difficult to accurately attach the magnetic piece 1 due to the difference in processing dimensions.

Purpose of the invention This invention was made in view of the points mentioned above.
It is an object of the present invention to provide a deflection yoke device in which a coil separator and a magnetic piece can be attached in perfect contact with each other.

Summary of the invention This invention has an integrally formed locking pawl that has a head protruding in the axial direction on the flat surface of the front flange of the coil separator and a slit in the center, and a magnetic piece that is attached to this flange. By forming a hole in the flat part of the magnetic piece, the locking claw is inserted into the hole of the magnetic piece, and at the final insertion position, the periphery of the hole is pressed by the head of the locking claw, thereby positioning the cathode ray tube in the axial direction. It was designed so that

Embodiment of the invention A first embodiment of the invention will be described in detail below with reference to FIGS. 4 to 6. Here, FIG. 4 is an exploded perspective view showing the coil separator and magnetic piece used in the present invention, FIG. 5 is a perspective view showing the deflection yoke device according to the present invention, and FIG. 6 is a perspective view showing the coil separator and magnetic piece. FIG. 3 is a cross-sectional view showing a member for positioning and fixing the magnetic material and the magnetic material.

In these figures, one side of the coil separator 21 is shown as a two-part type, and the coil separator 21 is conically tapered from the front flange portion 22 (conical portion 23) and has a terminal plate portion 24 at the rear.
and the cylindrical portion 25 are integrally molded. At the upper stage of the conical portion 23 are pieces 26, 26 for positioning a vertical coil, which will be described later. A joining claw 27 is formed on the end face of the front flange portion 22 to join with the other coil separator. Furthermore, locking claws 29 are integrally molded at predetermined positions on both ends of the flat portion 28 of the front flange portion 22 and protrude in the axial direction of the cathode ray tube.

As shown in FIG. 6, this locking pawl 29 has a head 30 in a substantially umbrella shape, and the diameter of the support portion 31 connected to the flange portion flat surface 28 that supports the head 30 is determined by the diameter of the head 30.
In addition to making the diameter slightly smaller than the maximum diameter of
The height C of the support portion 31 is set to be approximately the same as the thickness T of the magnetic piece. In addition, the locking pawl 29 has a slit 32 in the center of the flange portion 2 in FIG.
It is formed up to a portion excluding the plate thickness of the flat portion 28 of No. 2. The height dimension of this slit 32 is the head 3
It is sufficient that the diameter is made to be approximately the same as the diameter of the support portion 31 when the 0 is pushed from both sides, and for example, it may be formed so as to pass through the locking pawl 29. In other words, the minimum necessary interval between the slits 32 is such that the difference between the diameter of the support portion 31 and the maximum diameter of the head 30 can be accommodated.

Next, the magnetic piece 33 has stepped leg portions 34 at both ends.
It has an inwardly curved pressed shape with 34 mm. The intermediate portion 35 is formed to curve outward in a direction different from the curve direction of both end portions.
This has the advantage that the curvature of the legs 34, 34 of the magnetic piece 33 can be adjusted both outwardly and inwardly. In other words, the magnetic piece 33 is made larger or smaller than the curvature of the circumference of the coil separator 21, and when both are attached, the magnetic piece 33 due to the difference in curvature
The urging force allows the locking pawl 29 to more firmly attach the magnetic piece 33. That is, the leg portion 34 has a step portion 36 that contacts the front flange portion 22 of the coil separator 21.
One or more through-holes 37 are provided in the plane part of. This through hole 37 corresponds to the locking pawl 29 formed in the coil separator 21, and its diameter is the same as that of the locking pawl 29.
The diameter of the support portion is approximately the same as that of the support portion. Note that the code N indicates the core 38' of the vertical coil 38,
38'.

As shown in FIG.
0, and its peripheral edge is pressed so that the flat surface of the stepped portion 36 and the flange flat portion 28 of the coil separator 21 are closely attached. On this occasion,
The hole 37 pushes the head 30 of the locking claw 29 from both sides,
It is inserted through the slits with narrower intervals, and when it passes through the maximum diameter part, its peripheral edge part fits into the click.

Furthermore, since the magnetic piece 33 is attached so that the curvature in a steady state and the curvature after attachment change, the hole 3
It is possible to prevent rattling due to dimensional errors between the support portion 7 and the support portion 31.

FIG. 7 is a perspective view showing another embodiment of the present invention, in which a groove 39 is formed in the front flange portion plane 28 of the coil separator 21, and this groove 39 and the locking pawl 29
The slits 32 are made to communicate with each other. The length of the groove 39 is a predetermined length with respect to the diameter of the support portion 31 of the locking claw 29, and the elastic force of the head 30 is further increased than in the previous embodiment.

As a result, even if the height of the locking pawl 29 is reduced, it will not be difficult to deform when it is inserted through the hole 37 of the magnetic piece 33, and the diameters of the support portion 31 and the head 30 can be reduced to a considerable extent. Even if it is made larger, the deformation during the insertion will be easier and a stronger fixing effect will be achieved.

Further, as shown in FIG. 8, by forming further grooves in each perpendicular direction from both sides of the groove 39 to form an H-shaped groove 40, the slit 32 can be formed on both sides separated by the H-shaped groove 40. Head 30 and support part 3 at intervals
1 is formed with increased elasticity. In this way, even if the hole diameter of the magnetic piece 33 and its position are poor in accuracy, the width of the diameter change of the locking pawl 29 can be left with a considerable margin by selecting the slit interval, and the magnetic piece 33 can be securely fixed. It is.

In this way, in this invention, the only part that causes dimensional variation due to press working of the magnetic material is the hole position or hole diameter, and these dimensions do not affect the tube axis direction, so the installation accuracy when attached to the coil separator is has been improved.

Effects of the invention As described above, according to the invention, the magnetic material can be easily disposed by fitting the hole provided in the magnetic material into the locking claw integrally formed on the flange of the coil separator. This has the advantage that it is possible to provide a deflection yoke device with little variation during installation and with uniform performance.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a conventional example showing a magnetic piece and a coil separator, and Fig. 2 is an enlarged cross-sectional view to explain the action of the locking piece provided on the coil separator and the notch provided on the magnetic piece. 3 is a perspective view showing the entire conventional deflection yoke device, FIG. 4 is an exploded perspective view showing the coil separator and magnetic piece according to the present invention, and FIG. 5 is a deflection yoke device according to the present invention. FIG. 6 is an enlarged sectional view illustrating the function of the locking pawl and the hole, and FIG. 7 is an enlarged view of the locking pawl of a coil separator used in another embodiment of the present invention. FIG. 8 is an enlarged perspective view of a locking pawl according to another embodiment. 21... Coil separator, 22... Front flange portion, 28... Plane portion, 29... Locking claw, 30
...head, 32,39,40...slit, groove,
33...magnetic piece, 37...hole.

Claims (1)

[Claims for Utility Model Registration] A deflection yoke device in which a magnetic piece for correcting pincushion distortion is disposed in front of a deflection coil separator, wherein a locking pawl is integrally formed on the front flange flat part of the coil separator, and the locking pawl A deflection yoke device characterized in that the attachment position of the magnetic body is determined by fitting the magnetic body with a hole provided in a flat part of the magnetic body.