JP3519531B2 - Manufacturing method of correction coil - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention is, <br/> correction to be kicked Installing the neck piece to be attached to the neck outside the picture tube incorporating an electron gun The present invention relates to a method for manufacturing a coil. 2. Description of the Related Art In general, a self-convergence type deflection yoke is mounted on a color picture tube incorporating an in-line type electron gun. This deflection yoke generates a horizontal deflection magnetic field distorted in a pincushion shape and a vertical deflection magnetic field distorted in a barrel shape, and these three magnetic fields concentrate R, G and B electron beams on the phosphor screen. . However, such a self-convergence magnetic field alone cannot completely concentrate the electron beam on the entire surface of the screen, and the deviation of the convergence is caused by an error in assembling the deflection yoke itself or mounting the deflection yoke and the color picture tube. (Hereinafter referred to as misconvergence). In particular, in recent years, the demand for image quality of color picture tubes has increased, and the tolerance for misconvergence has become extremely severe. Therefore, in order to obtain a convergence characteristic which cannot be obtained only by the self-convergence magnetic field, a correction coil is provided on the deflection yoke, especially on the electron gun side, and a deflection magnetic field is caused to flow through the correction coil to dynamically provide the convergence characteristic. Is used. For example, Japanese Unexamined Patent Publication No. 62-90094 discloses a misconvergence of a pattern called vertical coma aberration on a screen 1 as shown in FIG.
The correction coils 7a, 7b and 9a, 9b wound around the legs of a pair of E-shaped cores 2, 3 are added to the deflection yoke as shown in FIG.
A technique of correcting with a polar magnetic field (the polarity is reversed every half cycle) is disclosed. However, in the prior art, when the correction coils 7a and 7b are mounted on the E-shaped core 2, the coils 7a and 7b are first wound around bobbins, respectively. Is fixed to the leg of the core, so one and the other of the pair of correction coils must be connected respectively, and the tip of the coil winding is directly connected, It is necessary to connect the terminals on a deflection circuit board added to the deflection yoke. In other words, if a pair of correction coils are individually wound, each of the correction coils must be connected. Therefore, components such as terminal plates and terminals, and assembly steps such as connection and soldering are required. Become. SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and a method of manufacturing a correction coil capable of reducing the number of parts and the number of assembly steps and forming a plurality of correction coils with a relatively simple configuration. The purpose is to provide. In order to achieve the above object, the present invention provides a U-shaped core having a bobbin attached to a connecting portion between both legs thereof, and an intermediate cure of the two U-shaped cores. A first coil is formed by winding a wire around the bobbin of one of the U-shaped cores, and then attaching the two coils to each other.
The intermediate jig in a direction orthogonal to the arrangement direction of the U-shaped core of
Insert the wire into the groove formed at one end of the holding rod
After passing the wire along the longitudinal direction of the holding rod,
Through the wire to form a continuous <br/> forming portion formed in said other end of the holding rod groove, then the second coil wound the wire to the bobbin of the other of said U-shaped core By being formed, the first coil and the second coil are continuously wound by one wire, and the length of the connecting portion can be arbitrarily adjusted by the holding rod. And [0010] By doing so, two or three or more correction coils are wound by using one wire, so that the connection terminal plates and terminals conventionally required, and It is possible to eliminate an assembling process such as connection and soldering. Therefore, the configuration is simplified, and the cost is accordingly reduced. Embodiments of the present invention will be described below with reference to the drawings. The cylindrical glass tube shown in FIG. 1 is a neck portion 12 of a 20-inch 90 ° deflection type color picture tube incorporating an in-line type electron gun,
A self-convergence type deflection yoke (not shown) mounted on the color picture tube has a saddle-type horizontal deflection coil and a saddle-type vertical deflection coil, and a horizontal deflection magnetic field distorted into a pincushion shape by the former. Then, a vertical deflection magnetic field distorted in a barrel shape is generated by the latter. Above and below the electron gun side end of the deflection yoke (not shown), a pair of U-shaped cores 13 and 14 are symmetrically arranged, and the upper core 13 has two legs 13a and 13a.
A common insulating bobbin 15 is provided at the connection portion 13b. The insulating bobbin 15 is provided with a coil 16 for vertical isotropic astigmatism correction and a coil 17 for vertical coma aberration correction wound in two stages, and has both legs 13a, 13b.
Is provided with an axial deviation correction coil 18 wound over both legs 13a and 13b. The lower core 14 is also provided with the upper core 13.
Similarly, a common insulating bobbin 19 is provided at the connecting portion of the two legs 14a, 14b.
A stepwise-wound vertical isotropic astigmatism correction coil 20 and a vertical coma aberration correction coil 21 are provided, and both legs 14a, 14b are wound around the two legs 14a, 14b. An axis deviation correction coil 22 is provided. The pair of axial deviation correcting coils 18 and 22 are:
An axial deviation correcting magnetic field as shown in FIG. 2 is applied to the electron beams on both sides. Thereby, the misalignment of the axis misalignment shown in FIG. 3 is corrected. The vertical isotropic astigmatism correction coils 16 and 20 and the vertical coma aberration correction coils 17 and 21 generate respective correction magnetic fields. These convergence correction coils are:
Each is a pair, and one and the other are connected and wound. The connection winding method is as follows.
In contrast to the conventional method of attaching and winding two cores, in the present embodiment, this is performed by a method using a jig shown in FIG. FIG. 5 is a sectional view of a main part of the winding machine shown in FIG. First, an intermediate jig 26 is newly provided in a winding machine, and two cores are attached and wound. Connecting parts 23, 2
The lengths of 4 and 25 can be arbitrarily adjusted by the length adjusting holding rod 27 within a range exceeding the interval between the positions where the two correction coils at the rear of the deflection yoke are to be mounted. With the cores 13 and 14 attached to the winding machine in this manner, one of the coils (the coil wound on the core 13) is wound first, then the copper wire is wound in the groove of the holding rod 27, and then the other is wound. Coil (coil wound on core 14)
, Two coils can be wound continuously. The winding direction of the coil is determined by the rotation direction of the winding jig. Therefore, if it is more convenient to make the winding directions of one coil and the other coil different afterwards to fix the two coils in place, then after winding one coil, rotate the other coil in reverse. It is good to wind in. As described above, according to the present invention, since two or more correction coils can be wound continuously, there is no need to connect the correction coils. Therefore,
Wiring components, such as when one and the other of the pair of correction coils are individually wound, wiring and soldering are not required, and the number of components and the number of assembly steps can be reduced. In the above embodiment, a pair of U
The axial misalignment correction coil 1 is provided on each of the U-shaped cores 13 and 14.
Although the case where the coils 16 and 20 for correcting vertical isotropic astigmatism and the coils 17 and 21 for correcting vertical coma aberration are wound in addition to winding the coils 8 and 22 has been described, the present invention is not limited to this. Instead, for example, other correction coils may be wound together, or the configuration may be such that one or both of the vertical isotropic astigmatism correction coil and the vertical coma aberration correction coil are not provided. Good. Further, the pair of U-shaped cores may be symmetrically disposed on both left and right sides of the electron gun side end of the deflection yoke. Further, the core may be a pair or more, and the shape may be an E-shape, an I-shape, or a ring shape. Further, in the present embodiment, the case where two coils are wound continuously has been described, but the present invention is not limited to this, and the intermediate jig and the holding rod are also used for three or more coils. By increasing, it is possible to continuously wind in the same manner as in the present embodiment. Further, in the above-described embodiment,
Although the correction coil attached to the deflection yoke has been described, the present invention is not limited to this, and a convergence yoke for generating a static or dynamic convergence magnetic field for concentrating three electron beams. The present invention can be applied to a correction coil to be attached, and the same effect as that of the present embodiment can be obtained. As described above, according to the present invention,
Since two or more correction coils attached to the neck part can be connected and wound, connection parts such as terminals and terminal boards, and assembling steps such as connection and soldering are not required, and two or more parts are required. The number of parts and the number of assembling steps can be greatly reduced as compared with the case where each of the correction coils is individually wound.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged view of a correction coil and the like near a neck portion of a color picture tube device according to an embodiment of the present invention; FIG. FIG. 3 is a diagram showing a pattern of misconvergence caused by axis misalignment. FIG. 4 is a schematic diagram of a coil-coupling winding machine used to form the coil of FIG. 1. FIG. 6 is a cross-sectional view of a main part of the winding machine for coil-coil winding shown in FIG. 6. FIG. 6 is a diagram showing a pattern of misconvergence caused by vertical coma. FIG. Description of symbols [Description of symbols] 12 Neck portions 13, 14 U-shaped cores 16, 20 Vertical isotropic astigmatism correction coils 17, 21 Vertical coma aberration correction coils 18, 22 Axis shift correction coils 23, 24, 25 Correction coil series Part 26 winding machine intermediate jig 27 holding rod for adjusting coil connecting portion length

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-220658 (JP, A) JP-A-9-283048 (JP, A) JP-A-3-15450 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H01J 29/66

Claims (1)

(57) [Claim 1] A bobbin is attached to a connecting portion of both legs of a U-shaped core, and the two U-shaped cores are sandwiched by an intermediate jig, and a winding machine is provided. A wire is wound around the bobbin of one of the U-shaped cores,
A coil is formed, and then a direction perpendicular to the arrangement direction of the two U-shaped cores
It is formed at one end of the upright on the intermediate jig retention bar direction
The wire is passed through the groove, and the wire is
After along the wood, through the wire forming the connecting portion formed in said other end of the holding rod groove, then the wound the wire to the bobbin of the other of said U-shaped core 2 By forming a coil, the first coil and the second coil are continuously wound by one wire, and the length of the connecting portion can be arbitrarily adjusted by the holding rod. A method for manufacturing a correction coil.