JPH0747788Y2 - Deflection yoke of television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the structure of a deflection yoke attached to a cathode ray tube of a television receiver, and more particularly to the structure of a bobbin of the deflection yoke.

(Prior Art) In a cathode-ray tube of a television receiver, a deflection yoke for deflecting an electron beam accelerated and focused by an electron gun built in a rear neck in a vertical direction and a horizontal direction is provided at a boundary portion between the neck and the funnel. Is installed from the outside.

The deflection yoke has a vertical deflection coil wound on the outside of a resin bobbin spread like a trumpet, and a horizontal deflection coil wound on the inside so that the respective magnetic fields are orthogonal to each other, and the coil is wrapped around the outside of the vertical deflection coil. The core is attached in this way. There are two types of winding shapes for the vertical deflection coil, a saddle shape and a toroidal shape. When combined with a horizontal deflection coil wound in a saddle shape, they are used as a saddle shape / saddle shape or a saddle shape / toroidal shape deflection yoke, respectively. It is used according to.

FIG. 6 shows an example of a conventionally used saddle-shaped / hook-shaped deflection yoke.

In this figure, 1 is a resin-made 2 formed in a trumpet shape.
The split bobbins, 2a and 2b, are two vertical deflection coils each having a hook shape wound on the outside of the two split bobbins 1, and 3 are two sandwiched between a pair of vertical deflection coils 2a and 2b. Gap member for regulating the mutual distance between the vertical deflection coils of 4 is a tape for fixing the vertical deflection coils 2a and 2b and the gap member 3, and 5 is a pair of vertical deflection coils fixed by the tape 4. 2 is a pair of cores divided into two that are attached so as to wrap and hold the coil from, and 6 is a clamping clip that clamps both edges of the two-divided core 5 in a tensioned state.

The pair of hull-shaped horizontal deflection coils (not shown) wound around the inner surface of the two-divided bobbin 1 is formed by an axially formed rib at a position rotated 90 degrees from the bobbin dividing line on the inner surface of the bobbin 1. It is partitioned and its winding position is in a positional relationship of being rotated by 90 degrees with respect to the vertical deflection coil wound on the outer surface of the bobbin.

(Problems to be solved by the invention) In assembling the above-mentioned deflection coil, when the vertical deflection coils 2a and 2b are wound on the outer surface of the two-divided bobbin 1 in which the horizontal deflection coil is wound on the inner surface, First, the gap member 3 is arranged at the divided portion of the two-divided bobbin so that the vertical deflection coils form an orthogonal magnetic field, and the pair of paddle-shaped vertical deflection coils 2a and 2b are arranged so as to sandwich the gap member 3. Since the tape is fixed with the tape 4, the positional relationship between the horizontal deflection coil and the vertical deflection coils 2a and 2b around the bobbin is easily determined, but the inner diameter of the vertical deflection coil has a design gap and manufacturing variations. As shown in FIG. 7, the pair of left and right vertical deflection coils 2a and 2b may be slightly different from each other in attachment position with respect to the bobbin 1. (In FIG. 7, the vertical deflection coil 2a is closer to the upper side than 2b in the figure, and the magnetic axes H are vertically misaligned.) Therefore, it causes image abnormal phenomena such as misconvergence, mislanding, and distortion. .

An object of the present invention is to make the vertical deflection coil wound around the bobbin of the deflection yoke in a fixed shape have a fixed mounting position on the bobbin.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a gap member at each divided portion of a two-divided bobbin, and the gap member is
A coil support frame is provided which extends in the circumferential direction of the bobbin and which sandwiches and supports the side edge of the vertical deflection coil with the outer peripheral surface of the bobbin. The gap member having the support frame for supporting the coil may be integrally formed with the two-divided bobbin or may be formed separately.

(Operation) Since the present invention has the above-described configuration, when the pair of vertical deflection coils is wound on the outer side of the two-divided bobbin, the side edges of the coils in the axial direction of the bobbin form the support frame of the gap member and the outer peripheral surface of the bobbin. Since it is sandwiched between them, the position of the vertical deflection coil with respect to the bobbin is reliably determined.

(Embodiment) The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention with a coil and a core removed, and FIG. 2 is an enlarged cross-sectional view of a portion A of the I-I section of FIG. 1, in which a vertical deflection coil is wound. It is a figure shown in a state.

In FIGS. 1 and 2, 1 is a two-divided bobbin, 1a is a projecting portion integrally formed on the two-divided bobbin 1, and 1c is a projecting portion.
A support frame for coil support is formed at the tip of 1a so as to project in the circumferential direction of the two-divided bobbin 1, and this constitutes a gap member. 2a and 2b are vertical deflection coils.

As shown in the drawing, a protrusion 1a integrally formed with the bobbin 1 is provided in the central portion of the divided portion 1b of the two-divided bobbin 1 over an appropriate length in the axial direction. The distance d to the inner side of the support frame 1c extending in the circumferential direction of the split bobbin 1 is set to a value (for example, 4 mm) slightly larger than the thickness of the vertical deflection coils 2a and 2b. Also the protrusion 1a
Has a thickness l of slightly less than half the required distance between the pair of vertical deflection coils 2a and 2b.

When the vertical deflection coil is wound around the bobbin having such a structure, as shown in FIG. 2, the side edges of the coils 2a and 2b are provided between the support frame 1c of the protrusion 1a and the outer peripheral surface of the bobbin 1. Since the positions of the coils 2a and 2b are surely determined in the same manner only by sandwiching them, even if there is a slight manufacturing variation in the shapes of the coils 2a and 2b, they are not deviated from each other. The vertical deflection coils 2a and 2b are wound and then the core 5 is attached so as to wrap and press the coils.
A support frame 1c for supporting the coil inside the split portion of the split core 5
The position of the core can be regulated more reliably because it is attached by the fastening clip after being brought into contact with the outer peripheral surface of the core.

FIG. 3 is a perspective view similar to FIG. 1 of another embodiment of the present invention,
FIG. 4 is a view similar to FIG. 2 which is enlarged at a portion B of the II-II section of FIG. 3, and FIG. 5 is an exploded perspective view of the bobbin shown in FIG.

In the figure, 1 is a 2-split bobbin, 1f is a split part of the bobbin 1.
Notches formed in 1b, 2a and 2b are vertical deflection coils, 7 is a T-shaped gap member, 7a is a fitting groove, and 7b is a coil support frame. The distance d between the inside of the support frame 7b and the outer peripheral surface of the bobbin 1 is slightly larger than the thickness of the vertical deflection coils 2a and 2b, and is, for example, 4 mm. Further, the thickness m of the T-shaped gap member 7 is equal to that of the pair of vertical deflection coils 2a and 2b.
It is preferable that the distance is slightly smaller than the required interval.

As shown in FIG. 5, the T-shaped gap member 7 is provided in the notch 1f formed over the appropriate length of the central curved portion of the divided portion 1b of the two-divided bobbin 1, and the divided portion 1b of the bobbin 1 is fitted into the fitting groove. Assemble the bobbin so that it fits into 7a.

As can be seen from the figure, when the T-shaped gap member 7 is assembled to the bobbin 1, a proper gap 1g is formed between the fitting groove 7a of the gap member 7 and the notch 1f of the bobbin 1.

In this embodiment, when the vertical deflection coil is wound around the bobbin 1, the side edges of the vertical deflection coils 2a and 2b are respectively sandwiched between the support frame 7b of the gap member 7 and the outer peripheral surface of the bobbin 1. The positions of the coils 2a and 2b are determined in the same way.

In this embodiment, since the gap 1g is formed between the fitting groove 7a of the gap member 7 and the cutout portion 1f of the bobbin 1, the vertical deflection coil can be slightly rotated left and right, which results in vertical movement. The position of the deflection coil can be adjusted, which allows fine adjustment of the relationship of the vertical deflection field to the horizontal deflection field.

After that, the core 5 is assembled and the fastening clip 6 is tightened as described above.

(Effects of the Invention) As described above, according to the present invention, a pair of coil supports having a support frame for supporting the side edge of the vertical deflection coil by sandwiching the side edge of the vertical deflection coil with the outer peripheral surface of the bobbin is provided at the divided portion. Since the vertical gap coil is wound around the outer surface of the bobbin, the mounting position on the bobbin does not deviate slightly between the pair of coils, which eliminates the misalignment of the magnetic axis. Since the direction of the deflection magnetic field is constant and misconvergence, mislanding, image distortion, etc. can be prevented, it is especially effective for deflection coils with a large air gap between the vertical deflection coil and the bobbin outer surface. is there. As described above, since the vertical change coil and the core on the bobbin are supported by only the pair of gap members having the coil support frame, the workability of assembly and adjustment is good, and the material cost can be reduced. Further, when the gap member is integrally formed with the bobbin, it is not necessary to insert the gap member in the bobbin, so that workability can be improved.

When the supporting gap member is prepared separately from the bobbin, the vertical deflection coil position can be directly finely adjusted by providing an appropriate gap between the fitting groove of the gap member and the bobbin, so that the horizontal Delicate adjustment (position, angle, etc.) of the vertical deflection magnetic field with respect to the deflection magnetic field can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention with a coil and a core removed, and FIG. 2 is an enlarged cross-sectional view of a portion A of the I-I section of FIG. 1 in which a vertical deflection coil is wound. FIG. 3, FIG. 3 is a perspective view similar to FIG. 1 of another embodiment of the present invention, and FIG. 4 is an enlarged view of the portion B of the II-II cross section of FIG.
FIG. 5 is a view similar to FIG. 5, FIG. 5 is an exploded perspective view of the bobbin shown in FIG. 3, FIG. 6 is a perspective view showing a conventional deflection yoke with a part of a core removed, and FIG. It is a figure which shows the winding misalignment of the vertical deflection coil which arises in a yoke. 1 ... 2 split bobbin, 1a ... projection, 1b ... divided part,
1c ... Support frame, 1f ... Notch, 2a, 2b ... Vertical deflection coil, 5 ... Core, 7 ... T-shaped gap member

Claims (3)

[Scope of utility model registration request] 1. A deflection yoke of a television receiver in which a vertical vertical deflection coil is wound around the outer surface of a trumpet-shaped two-divided bobbin, and a gap member is provided at each divided portion of the two-divided bobbin. A television receiver characterized in that the gap member is formed with a support frame extending in the circumferential direction of the bobbin and sandwiching and supporting a side edge of the vertical deflection coil in the bobbin axial direction with the bobbin. Deflection yoke. 2. A deflection yoke for a television receiver according to claim 1, wherein the gap member having a support frame for supporting the coil is formed integrally with the two-divided bobbin. 3. The television image receiving apparatus according to claim 1, wherein the gap member provided with the support frame for supporting the coil is displaceable in a direction perpendicular to the bobbin divided portion. Deflection yoke of the machine.