JPH087784A - Deflection yoke device - Google Patents

Abstract

(57) [Abstract] [Purpose] To make the number of turns of the coil winding 3 of the pair of unnecessary radiation prevention coils 1 provided on the top side and the bottom side of the deflection yoke uniform. [Structure] The winding start of a coil winding 3 is prevented from being twisted to a twisting terminal 5a and then wound around a coil bobbin 2T on the top side of a deflection yoke to form an unnecessary radiation prevention coil 1T. Further, the coil winding 3 is drawn out in the direction of returning to the twisted terminal 5a and drawn along the lower side of the coil winding guide 15 to form the bottom side unnecessary radiation prevention coil 1B in the same manner. Then, the coil winding 3 is pulled out in the direction in which the coil winding 3 is folded back toward the twisting terminal 5b, and the winding end of the coil winding 3 is twisted to the twisting terminal 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke device having an unnecessary radiation prevention coil for canceling a leakage magnetic field leaking from the deflection yoke to the outside.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional deflection yoke device 11 having unnecessary radiation preventing coils 1T and 1B mounted on a cathode ray tube of a television receiver or a display device. The deflection yoke device 11 has a deflection yoke and unnecessary radiation prevention coils 1T and 1B.

In this type of deflection yoke, a saddle-shaped horizontal deflection coil (not shown) is formed along the inner peripheral surface of a bosh-shaped deflection yoke bobbin 12, and a core (not shown) is provided outside the deflection yoke bobbin 12. ) And a vertical deflection coil (not shown).

Further, the unnecessary radiation preventing coils 1T and 1B for canceling the leakage magnetic field which leaks from the deflection yoke to the outside and adversely affects the human body and the like are connected to the coil bobbins 2T and 2B by the coil winding (for example, enamel-coated copper wire) 3. It is wound and provided on the top side and the bottom side of the deflection yoke bobbin 12, respectively. On the other hand, the deflection yoke bobbin 12
On the neck side of the wiring board 21, a wiring board 21 provided with a wiring pattern for electrically connecting the top and bottom side unwanted radiation prevention coils 1T and 1B in series is installed. The wiring board 21 has the wiring pattern. A connection terminal 22 that is electrically connected to is provided. Also, unnecessary radiation prevention coils 1T, 1B
The winding start side and the winding end side of the coil winding 3 are drawn out and cut to a length necessary for wiring, and the wiring portion of the drawn coil winding 3 (leading wires 9a, 9b) is covered with an insulating tube 23. Then, the connecting portion is subjected to a treatment for connection such as polishing, and the connecting portion is fixed to the connecting terminal 22 by soldering and fixed.

However, in the deflection yoke device 11 as shown in the figure, the terminal portions such as polishing the connecting portion of the lead wires 9a and 9b, covering the wiring portion with an insulating tube and wiring the wire and stopping it are manually performed. In addition, since there is a lead wire 9a on the winding start side and a lead wire 9b on the winding end side of the coil winding 3 for each unnecessary radiation prevention coil 1, the two unnecessary radiation prevention coils 1 It was necessary to perform the terminal treatment of the four lead wires 9 in order to form the two in series, and the number of processing man-hours was large and the work efficiency was poor. Further, there are many erroneous wirings in which the lead wire 9a on the winding start side and the lead wire 9b on the winding end side are mistakenly prevented from being entangled in the connection terminal 22.

[0006]

In order to solve the above problems, the inventor has made a prototype of a deflection yoke device 10 as shown in FIG. FIG. 4 shows the deflection yoke device as viewed from the neck side. This deflection yoke device 10 is different from the deflection yoke device 11 of FIG. 6 in that ribs 25a and 25b for restricting the routing path of the coil winding 3 are provided on the top side of the head of the deflection yoke bobbin 12, and the deflection yoke bobbin is also provided. A pair of cord terminals 5a and 5b are provided on the left side of the head of the coil 12, and the winding start end 3a of the coil winding 3 is secured to the cord terminal 5a so that the coil winding 3 (lead wire 9a ) Is routed around and the top side coil bobbin 2T
The unwanted radiation prevention coil 1T is formed by continuous winding on the winding end of the coil winding 3 (lead wire 9c) of the unwanted radiation prevention coil 1T and is drawn along the head of the deflection yoke bobbin 12. Then, the coil bobbin 2B on the bottom side is continuously wound to form the unwanted radiation prevention coil 1B, and the winding end side (leader wire 9b) of the coil winding 3 of the unwanted radiation prevention coil 1B is drawn and routed, That is, the winding end 3b of the coil winding 3 is entwined with the entanglement terminal 5b. With the above configuration, one coil winding 3 that goes out from one of the cord terminals 5a and returns to the other cord terminal 5b is continuously wound, and a pair of unwanted radiation prevention coils 1T and 1B are formed in series. ,
The number of processing steps such as terminal processing is reduced, erroneous wiring is eliminated, and the manufacturing process is simplified, so automation is possible and work efficiency is improved.

By the way, the unnecessary radiation preventing coils 1T and 1B formed as shown in the figure have magnetic fields H ₁ and H in the direction of canceling the leakage magnetic field leaking from the deflection yoke to the outside (for example, from the bottom side to the top side). ₂ is generated, and unnecessary radiation prevention coils 1T and 1B from the top side
As shown in FIG. 5, the coil bobbins 2T and 2B
The coil winding 3 is continuously wound counterclockwise (in the direction of the arrow). In the unnecessary radiation prevention coil 1T on the top side of FIG. 5A, the coil winding 3 is passed under the rib 25a on the winding start side, and the winding bobbin surfaces L and T are wound in order from the winding start point S of the coil bobbin 2T. , R, B, L, T, R, and is wound counterclockwise, and is drawn out from near the winding end point F to the lower side of the winding end rib 25b. Also, FIG.
In the unnecessary radiation prevention coil 1B on the bottom side of (b), the coil winding 3 is rotated counterclockwise (in the direction of the arrow) from the vicinity of the starting point S of the coil bobbin 2B along the winding drum surfaces B, L, T, R, B.
It is wound around and pulled out near the end point F.

However, as shown in FIG. 5, since the winding start side (winding start point S) and the winding end side (winding end point F) of the coil winding 3 on the coil bobbins 2T, 2B are different, the top side is unnecessary. Radiation prevention coil 1T {Fig. 5
In (a)}, the number of windings of the coil winding 3 on the winding barrel surfaces L, T, R of the coil bobbin 2T is larger than the number of windings of the coil winding 3 on the winding barrel surface B. In the unnecessary radiation prevention coil 1B (FIG. 5B), the number of windings of the coil winding 3 on the winding barrel surface B of the coil bobbin 2B is larger than the number of windings of the coil winding 3 on the winding barrel surfaces L, T, R. Has become. In this way, the winding barrel surfaces L, T, R and B of the coil bobbins 2T, 2B are
Due to the difference in the number of windings of the upper coil winding 3, a magnetic field H ₁ biased to the winding body surfaces L, T, R is generated in the top side unwanted radiation prevention coil 1T, and the bottom side unwanted radiation prevention coil 1T.
In B, there was a problem that a biased magnetic field H ₂ was generated on the winding drum surface B side and uniform magnetic fields H ₁ and H ₂ could not be obtained.

Regarding the number of turns of the coil winding 3 of the unnecessary radiation prevention coil 1T on the top side and the unnecessary radiation prevention coil 1B on the bottom side shown in FIG. 5, first, the coil bobbin 2
Comparing the number of turns of the coil winding 3 on the winding body surfaces L, T, R of T, 2B, the top side is larger than the bottom side, and then the coils on the winding body surface B of the coil bobbins 2T, 2B. Comparing the number of turns of the winding 3, the top side is smaller than the bottom side. That is, the number of turns of the coil winding 3 on the top side is larger than the number of turns of the coil winding 3 on the bottom side by half a turn. Due to the difference in the number of half turns, the unnecessary radiation prevention coil 1T on the top side is wound. the strength of the magnetic field H ₁ has a problem that becomes stronger than the strength of the magnetic field of H ₂ unnecessary radiation prevention coil 1B of the bottom side.

Further, as described above, the uniform magnetic fields H ₁ and H ₂ cannot be obtained from the unnecessary radiation prevention coils 1T and 1B, and the magnetic fields H ₁ and H ₂ have different magnetic field strengths. There is a problem that the magnetic field H ₁ and the magnetic field H ₂ are unbalanced, and the unbalanced magnetic fields H ₁ and H ₂ act non-uniformly on the horizontal deflection magnetic field generated from the horizontal deflection coil, so that the magnetic field lines of the horizontal deflection magnetic field are linear. However, there was a problem that the bow was curved and misconvergence occurred.

The present invention has been made to solve the above problems, and its object is the number of turns of the coil winding 3 of the unwanted radiation prevention coils 1T and 1B on any part of the winding bobbin surface of the coil bobbins 2T and 2B. Is to provide a deflection yoke device 10 including a pair of unnecessary radiation preventing coils 1T and 1B in which the number of turns of the top side and the bottom side unnecessary radiation preventing coils 1T and 1B is equal.

[0012]

In order to achieve the above object, the present invention is constructed as follows. That is, in the deflection yoke device of the first invention, coil bobbins are mounted on the top side and the bottom side of the deflection yoke on the bobbin head side, and a pair of barb terminals project on one of the left and right sides of the bobbin head side. One end of the coil winding is pulled out by twisting it to the twisting terminal on one side and wound around the coil bobbin on one side of the top side and the bottom side to cancel the leakage magnetic field emitted from the deflection yoke. A prevention coil is formed, and the coil winding on the winding end side of the coil is folded back toward the pair of twist terminals and wound around the coil bobbin on the opposite side. The coil winding on the winding end side of the coil formed is folded back toward the pair of twist terminals and connected to the other twist terminal. There.

In the deflection yoke device of the second invention, a ring-shaped bobbin holding frame is fitted and attached to the bobbin head of the deflection yoke, and coil bobbins are provided on the top side and the bottom side of the bobbin holding frame. The bobbin holding frame is provided with a pair of barb terminals on the left and right sides, and one end of the coil winding is coiled by the barb terminal on one side to be pulled out to the top side and the bottom side. An unnecessary radiation prevention coil that is wound around the coil bobbin on one side to cancel the leakage magnetic field emitted from the deflection yoke is formed, and the coil winding on the winding end side of the coil is folded back and passed toward the pair of twist terminals. It is wound around the coil bobbin on the opposite side to form an unnecessary radiation prevention coil for canceling the leakage magnetic field,
The coil winding on the winding end side of the coil is folded back toward the pair of twist terminals and is connected to the other twist terminal.

[0014]

In the present invention having the above-mentioned structure, since the winding end side of the coil winding of the unnecessary radiation preventing coil is folded back toward the winding terminal which has prevented the winding start of the coil winding, the winding start and winding of the coil winding are prevented. The end is pulled out in the same direction, and the unnecessary radiation prevention coil has the same number of turns of the coil winding in any part on the surface of the coil bobbin around which the coil winding is wound. Since the unnecessary radiation prevention coil is also formed, the number of windings on the top side and the bottom side is the same.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same names as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a deflection yoke device 10 of the first embodiment.
2 is shown as a model of the routing path of the deflection coil winding 3 of FIG. This deflection yoke device
A coil winding guide 15 is provided on the coil 10 in order to prevent the lead wires 9a, 9b and 9c from approaching each other or crossing each other. As shown in FIG. The coil winding 3 (lead wire 9)
a) passes under the rib 25T and reaches the point O of the coil bobbin 2T.
The unnecessary radiation preventing coil 1T on the top side is formed by winding the desired number of times along the winding drum surface L, T, R, B in the order of winding start from the vicinity, and the unnecessary radiation preventing coil 1T on the winding end side is formed. The coil winding 3 (leading wire 9c) is folded back from the vicinity of the point O toward the twisting terminals 5a and 5b and drawn out, and is routed along the lower side of the coil winding guide 15 so that the winding terminals 5a and 5b The winding bobbin faces L, T, R, B are passed from the vicinity of the point P of the coil bobbin 2B on the bottom side through the lower side in the winding start order.
The bottom side unnecessary radiation preventing coil 1B is formed by winding the same number of turns as the top side unnecessary radiation preventing coil 1T along the top, and the coil winding 3 (leader wire 9b) is formed from around the point P.
A pair of unnecessary radiation preventing coils 1T and 1B are formed in series, and are folded back toward the peeling terminals 5a and 5b and pulled around to be held by the peeling terminal 5b.

In the first embodiment, one coil winding 3 is entangled and pulled out by the entanglement terminal 5a to form an unwanted radiation prevention coil 1T on the top side, and the entanglement terminals 5a, 5
Since the unnecessary radiation preventing coil 1B on the bottom side is formed by folding back toward b and passing through the peeling terminals 5a and 5b, the unwanted radiation preventing coils 1T and 1B are prevented from being peeled off. Since the winding start side and the winding end side of the coil winding 3 are drawn out in the same direction, the number of windings of the coil winding 3 on each winding barrel surface L, T, R, B of the coil bobbins 2T, 2B is made uniform. Can be wound. In this way, in this embodiment, since the number of windings on each winding drum surface can be made uniform, it is possible to obtain uniform magnetic fields H ₁ and H ₂ from the unnecessary radiation prevention coils 1T and 1B.

Further, in the conventional example, since the number of windings of the coil winding 3 of the unnecessary radiation preventing coil 1T on the top side and the unnecessary radiation preventing coil 1B on the bottom side is different by half a turn, the unnecessary radiation preventing coil 1T on the top side is different. Magnetic field H ₁ generated from the bottom side unnecessary magnetic field H generated from the bottom side unnecessary radiation prevention coil 1B
_Although the strengths of the magnetic fields of ₂ are different, in the present embodiment, the number of turns of the coil winding 3 of the unnecessary radiation prevention coils 1T and 1B on the top side and the bottom side can be made equal, so that the magnetic field H
The magnetic field strengths of ₁ and the magnetic field H ₂ can be made the same.

Further, as described above, the magnetic fields H ₁ and H ₂ can be generated evenly from the unnecessary radiation prevention coils 1T and 1B, and the strengths of the magnetic fields H ₁ and H ₂ on the top side and the bottom side are the same. Since the magnetic fields H ₁ and H ₂ are well balanced, the well-balanced magnetic fields H ₁ and H ₂ act evenly on the horizontal deflection magnetic field generated from the horizontal deflection coil, and the magnetic field lines of the horizontal deflection magnetic field are generated. It is possible to prevent the problem that the warp warps into an arc and causes misconvergence.

The second embodiment will be described with reference to FIG. In the description of the present embodiment, the same reference numerals will be given to the same names as those in the conventional example and the first embodiment, and detailed description thereof will be omitted.

In this embodiment, as in the first embodiment, the coil bobbins 2T and 2B are directly attached to the top side and the bottom side of the head of the deflection yoke bobbin 12 to form the unnecessary radiation preventing coils 1T and 1B. Instead of bobbin holding frame 6
Radiation prevention coils 1T and 1B on the top and bottom sides of
And the bobbin holding frame 6 is attached to the head of the deflection yoke bobbin 12 to indirectly attach the pair of unnecessary radiation prevention coils 1T and 1B to the head of the deflection yoke.

The bobbin holding frame 6 is composed of a ring-shaped frame body as shown in FIG. 3, and a pair of coil bobbins 2T and 2B is detachably attached to the top side and the bottom side of the bobbin holding frame 6 by adhesion, or by the bobbin holding frame. 6 and 6 are integrally formed. A pair of twist terminals 5a and 5b are provided on the left side of the bobbin holding frame 6, and a coil winding is provided to prevent the lead wires 9b, 9b and 9c from approaching or crossing each other. A line guide 15 and a rib 25T are provided. As shown in FIG. 2, the coil winding 3 is wound around the coil bobbins 2T and 2B in the same manner as in the first embodiment to form a pair of unwanted radiation prevention coils 1T and 1B in series.

The second embodiment has the same effect as that of the first embodiment, can generate the uniform magnetic fields H ₁ and H ₂ from the unwanted radiation prevention coils 1T and 1B, and can also generate the magnetic field H _1.
And the magnetic field H ₂ can have the same strength, and the magnetic field H ₁ and the magnetic field H ₂ can be well balanced.

The present invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted. For example, in the above embodiment, the twist terminals 5a and 5b are connected to the deflection yoke bobbin 12.
Although it is provided on the left side of the head or on the left side of the bobbin holding frame 6, it may be provided on the right side.

Further, in the above embodiment, the lead lines 9a, 9
A coil winding guide 15 is installed to prevent b and 9c from approaching each other or crossing each other, but the lead wire 9
It is also possible to form a groove for restricting the routing route of a, 9b, 9c to avoid contact of each lead wire 9a, 9b, 9c.

Further, in the above embodiment, the deflection yoke bobbin is used.
Although the unnecessary radiation preventing coils 1T and 1B are formed on the top side and the bottom side of the bobbin holding frame 6 and the bobbin holding frame 6, they may be formed on the left side and the right side. In this case, the barb terminals 5a and 5b are the top side or the bottom side. Will be installed on the side.

Further, although the leakage magnetic field is canceled from the bottom side to the top side in the above embodiment, it may be from the top side to the bottom side. In this case, the coil bobbin 2T, The winding direction of the coil winding 3 of 2B is reversed, or the coil 1
The polarities of T and 1B in the connection direction are reversed.

Further, in the above embodiment, the pair of unnecessary radiation preventing coils 1T and 1B is provided, but it is also possible to provide only one of them.

Furthermore, the coil bobbins 2T and 2B may have a shape other than a square, such as a rectangle or a circle.

[0030]

According to the present invention, a pair of barb terminals are provided so as to project on one of the left and right sides of the bobbin head side of the deflection yoke, and the coil winding extends from the barb terminal on one side to the top side. And an unwanted radiation prevention coil on one side of the bottom side is formed, and the winding end side of the coil is pulled back toward the pair of twist terminals, so that the winding start side and winding end side of the coil winding on the coil bobbin are the same. It is possible to form an unnecessary radiation prevention coil in which the number of windings of the coil winding is equal in any part on the surface around which the coil winding of the coil bobbin is wound. A partially biased magnetic field is not generated, and a uniform magnetic field can be generated.

Similarly, the number of turns of the coil windings of the unnecessary radiation preventing coils on the top side and the bottom side can be made equal, and the strengths of the magnetic fields generated by the unnecessary radiation preventing coils on the top side and the bottom side are the same. become.

From the above, by generating an even magnetic field from the unnecessary radiation preventing coils on the top side and the bottom side, and by making the strengths of both magnetic fields equal, the magnetic fields generated on the top side and the bottom side can be reduced. The balance can be improved, and this magnetic field acts evenly on the horizontal deflection magnetic field generated from the horizontal deflection coil, so that the horizontal deflection magnetic field does not warp in an arc shape to cause misconvergence.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a deflection yoke device of the present invention.

FIG. 2 is an explanatory view showing the routing of the coil winding of FIG. 1 as a model.

FIG. 3 is an explanatory diagram showing the embodiment of FIG.

FIG. 4 is an explanatory diagram showing a deflection yoke device that the inventor has made as a prototype.

5 is an explanatory view showing a model of a winding method of the coil winding of FIG.

FIG. 6 is an explanatory diagram showing a conventional deflection yoke device.

[Explanation of symbols]

 1 Unwanted radiation prevention coil 2 Coil bobbin 3 Coil winding 5 Barbing terminal 6 Bobbin holding frame 10, 11 Deflection yoke device

Claims (2)

[Claims] 1. A coil bobbin is mounted on a top side and a bottom side of a deflection yoke on the bobbin head side, and a pair of barb terminals are projectingly provided on one of the left and right sides of the bobbin head side. An unnecessary radiation prevention coil that cancels the leakage magnetic field emitted from the deflection yoke is formed by winding one end of the coil bobbin that is pulled out from the one twisted terminal and wound around the coil bobbin on one side of the top side and the bottom side. The coil winding on the winding end side is folded back toward the pair of twist terminals and wound around the coil bobbin on the opposite side to form an unnecessary radiation prevention coil for canceling a leakage magnetic field. A deflection yoke device in which the coil winding on the end side is folded back toward the pair of twist terminals and is twisted and connected to the other twist terminal. 2. A ring-shaped bobbin holding frame is fitted and mounted on the bobbin head of the deflection yoke, and coil bobbins are provided on the top side and the bottom side of the bobbin holding frame, and one of the left and right sides of the bobbin holding frame is provided. On one side, a pair of twist terminals are projected, and one end of the coil winding is twisted and pulled out by one twist terminal and is wound around one side of the top and bottom bobbins to deflect. An unwanted radiation prevention coil that cancels the leakage magnetic field from the yoke is formed,
The coil winding on the winding end side of the coil is folded back toward the pair of twist terminals and wound around the coil bobbin on the opposite side to form an unnecessary radiation preventing coil for canceling a leakage magnetic field. A deflection yoke device in which the coil winding on the winding end side is folded back toward the pair of twist terminals and is twisted and connected to the other twist terminal.