JP3287032B2 - Method of forming coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a coil used in a deflection yoke mounted on a television receiver or a display device.

[0002]

2. Description of the Related Art FIG. 8 shows a deflection yoke mounted on a cathode ray tube of a television receiver or a display device. In this type of deflection yoke, horizontal deflection coils (not shown) are mounted on the top side and the bottom side along the inner peripheral surface of a bobbin 2 as a bobbin-shaped coil bobbin, and a vertical deflection coil is mounted outside the bobbin 2. Deflection coil (not shown) and core (not shown)
Is attached.

FIG. 7 shows a bobbin 2 as a coil bobbin of a saddle type deflection coil used for a general deflection yoke. A coil winding is stacked and wound on the bobbin 2 to form a deflection coil. As this coil winding, FIG.
As shown in FIG. 5, when a deflecting coil is formed by using a winding 11 made of a conducting wire (including a litz wire) provided with an insulating layer, or a ribbon as shown in FIG. A multi-core parallel conducting wire 15 such as a wire is used.

The multi-core parallel conductor 15 is shown in FIG.
As shown in FIG. 2, conductor wires 8 such as copper or aluminum covered with an insulating layer 4 are arranged in parallel using an adhesive 6 and adhered, or as shown in FIG. A plurality of conductor wires 8 covered with an insulating layer 4 on one side of an insulating sheet 7 are arranged in parallel and bonded using an adhesive 6, or as shown in FIG. A plurality of conductor wires 8 having an adhesive layer 9 formed thereon are arranged and adhered in parallel, or as shown in FIG. 3D, a thermoplastic adhesive layer (such as hot melt) is provided on the outside of the insulating layer 4. A plurality of conductor wires 8 each having a layer (layer) 20 formed thereon are arranged in parallel and bonded.

[0005]

However, the bobbin 2 for the deflection coil has an extremely complicated structure as shown in FIG. 7, and the bottom surface of the bobbin 2 on which the coil winding is wound is tertiary. Since it is composed of curved surfaces, FIG.
As shown in the figure, since the coil winding has springback when the single winding 11 and the coil winding of the multi-core parallel conducting wire 15 are stacked on the bobbin 2, the coil winding thus stacked is wound on the bobbin. There is a problem of floating within 2. In order to eliminate the lifting of the coil windings, as shown in FIG. 3, the coil windings wound in a stack are pressed by a pressing die 12 to adhere closely along the bottom surface 10 of the bobbin 2, and for example, The secondary winding method in which an electric current is applied to melt and cool and solidify the adhesive layer is used to prevent the coil winding from rising.

However, in the secondary molding method using the pressing die 12, since the bottom surface 10 of the bobbin 2 is a cubic curved surface, it is necessary to process the pressing surface of the pressing die 12 with high precision so as to match the bottom surface 10. If the processing accuracy is poor, there is a problem that the pressing pressure is not evenly applied to the bottom surface 10. In addition, since the shape of the bobbin 2 is complicated and the bottom surface 10 is a cubic curved surface, the bobbin 2 must be machined with high precision.

In addition, since the mold 12 is forcibly pressed, there is a problem that the coil of the coil winding is easily damaged.
Further, each time the type and shape of the bobbin 2 is different, the pressing die 12
Is required.

Furthermore, in the secondary molding method using the pressing die 12, an extra mechanism for retracting the pressing die 12 during winding of the coil winding so as not to hinder the winding operation is required. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a coil having a uniform pressing pressure without using a pressing mold when forming a coil by winding a coil winding. It is an object of the present invention to provide a method of forming a coil which does not damage the coil.

[0010]

The present invention is configured as follows to achieve the above object. That is, in the method of forming a coil according to the first aspect of the present invention, after laminating and winding a coil winding around a winding groove of a coil winding frame, a DC or pulsating current is applied to the laminated and wound coil winding , and the coil is wound. frame
The magnetic field generator provided on the front or back side of
And generating a magnetic field across the line, pressing the coil windings on the bottom side of the winding groove of the coil body by the force generated by the law left off Remi <br/> ring applied to the coil winding, the coil windings In this state, the laminated coil windings are bonded and fixed in the pressed state.

Further, a method of forming a coil according to the second invention is as follows.
The coil winding is a multi-core parallel conductive wire.

[0012]

[Function] A DC or pulsating current is applied to a coil in which coil windings are stacked and wound, and a magnetic field generator is applied to the coil .
Magnetic field generated from the coil winding by the force generated by Fleming's left-hand rule .
It is pressed against the bottom side , and the coil windings laminated in this state are adhesively fixed.

[0013]

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

FIG. 1 shows a method for forming a coil according to this embodiment. In this embodiment, a coil is formed by laminating and winding a multi-core parallel conductive wire 15 in the coil winding groove 5 of the bobbin 2 as shown in FIG. 7, and the feature of this embodiment is that the coil is laminated and wound. A DC or pulsating current is applied to the multi-core parallel conductor 15 and a magnetic field is applied to this coil, and the force generated by Fleming's left-hand rule is applied to the multi-core parallel conductor 15.
Is pressed against the bottom surface 10 of the coil winding groove 5, and in this state, the multi-core parallel conductive wires 15 of each layer are bonded and fixed.

In FIG. 1, a bobbin 2 is mounted on a base of a winding machine, and a multi-core parallel conductive wire 15 is fed from a nozzle of the winding machine into a coil winding groove 5 of the bobbin 2 so as to be laminated and wound. Is done. This multi-core parallel conductor 15 is shown in FIG.
As shown in FIG.
Is used.

The winding machine is provided with means for supplying a current to the multifilamentary parallel conducting wire 15, and a magnetic field generator 18 is provided behind the bobbin 2 in the coil winding groove 5.
This magnetic field generator 18 is wound around the coil winding groove 5 in a laminated manner.
A magnetic field crossing the multifilamentary parallel conducting wire 15 is generated.

Next, the operation of manufacturing a coil using the above-described apparatus will be described with reference to FIG. First, the multi-core parallel conducting wire 15 is laminated and wound around the coil winding groove 5 of the bobbin 2 to form a coil. By means of current supply to this coil
Direct current or pulsating current flows from the front side to the back side of the paper to generate Joule heat, and this heat generates multi-core parallel conductors.
Melt 15 adhesive layers. In this state, the magnetic field generator 18 is driven to move the multi-core parallel conductor 15 in the direction of arrow E,
When a magnetic field in the direction from left to right is applied, a force F directed toward the bottom surface 10 of the winding groove 5 is obtained according to Fleming's left-hand rule.
Is generated, and the multi-core parallel conductor 15 is pressed against the bottom surface 10 of the coil winding groove 5, so that the multi-core parallel conductor 15 is not lifted.

Next, in a state where the multifilamentary parallel conducting wire 15 does not float, the current flowing from the current supply means to the coil is weakened, the temperature of the coil is lowered, and the adhesive layer of the multifilamentary parallel conducting wire 15 is solidified.
At this time, if necessary, the strength of the magnetic field is increased so that the force of F does not decrease. Also, forced air cooling or the like may be used in combination to promote cooling of the coil. And multi-core parallel conductor
When the 15 adhesive layers are solidified and the coil is fixed, supply of electric current and magnetic field is stopped, and the coil is removed from the winding machine.

According to the present embodiment, a DC or pulsating current is applied to the laminated and wound multi-core parallel conductor 15 and a magnetic field is applied to the multi-core parallel conductor 15 by the force of F generated by Fleming's left-hand rule. 15 is pressed against the bottom side of the coil winding groove 5, so that the multi-core parallel conductor 15 does not float, and there is no damage to the multi-core parallel conductor 15 by the pressing mold as in the case of the proposed example. , And multi-core parallel conductor 15
Since the pressing pressure on the coil becomes uniform, a good deflection coil without deformation can be formed.

Further, in the secondary molding method using a pressing die as in the proposed example, the pressing die must be retracted so as not to interfere with the winding, but in this embodiment, the magnetic field generator is always set. It is possible to simplify the working process and the device.

Furthermore, in the proposed example, the shape of the stamping die is complicated and high precision is required, and the stamping die has to be manufactured every time the type and shape of the bobbin 2 are different. In the embodiment, it is only necessary to provide a magnetic field generator.

The present invention is not limited to the above-described embodiment, but can take various embodiments. For example, in the above embodiment, the electric wire having the thermoplastic adhesive layer 20 shown in FIG. 5D is used as the multi-core parallel conductive wire 15, but the resin forming the adhesive layer is, for example, a liquid thermosetting resin. May be laminated and wound while being attached to the multi-core parallel conductive wires shown in FIGS. 5A to 5C, and may be heated and cured while applying a current and a magnetic field. Similarly, a liquid UV-curable resin may be used and UV-cured while applying a current and applying a magnetic field. Furthermore, after laminating and winding the multi-core parallel conductors of FIGS. 5 (a) to 5 (c), a fixing resin is applied or sprayed while energizing and applying a magnetic field to form a multi-core parallel conductor of each layer. It may be cured by heating.

Further, since the magnetic field generator 18 for generating a magnetic field in the direction of arrow E in FIG. 1 needs to apply a magnetic field substantially uniformly to the entire coil formed by laminating and winding the multi-core parallel conductor 15, FIG. As shown in (1), it is desirable to previously install a coil 14 and the like having a shape substantially similar to the coil to be manufactured on the back surface of the bobbin 2 (the side facing the coil winding groove 5). By passing a current through the magnetic field generator 18 of the coil 14 having the similar shape in the same direction as the coil to be produced, a magnetic field E in the direction of the arrow crossing the coil to be produced is generated. The object can be achieved by pressing the core parallel conducting wire against the bottom surface of the coil winding groove. Although a magnetic field is applied from the back side of the bobbin 2 in FIGS. 1 and 2, a magnetic field can be applied from the front side of the bobbin 2. Further, a magnet, an electromagnet, or other magnetic field generating means can be used instead of the coil having the similar shape.

Further, in the above-described embodiment, the multi-core parallel conductor 15 has been described as the coil winding, but a conventional single-wire winding 11 can be used for the coil winding.

Further, in the above embodiment, the multifilament parallel conductor 15 is omitted from the coil winding groove 5 of the bobbin 2, and the coil winding such as the multifilament parallel conductor 15 and the winding 11 is wound at an appropriate position on the bobbin 2. You may.

Further, in the above embodiment, the method of forming the coil for the deflection yoke has been described. However, the method of forming the coil may be suitable for forming a coil for a flyback transformer, for example. Can be applied.

[0027]

According to the present invention, a DC current or a pulsating current is applied to a laminated coil winding and a magnetic field is applied to press the coil winding against a coil winding by a force generated by Fleming's left-hand rule. With the configuration, lifting of the coil winding is eliminated, and there is no damage to the coil winding by the pressing mold as in the case of the proposed example, and the pressing pressure on the coil winding becomes uniform, A good deflection coil without deformation can be formed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a method for forming a coil according to an embodiment.

FIG. 2 is an explanatory diagram of a magnetic field generator of another configuration of the present embodiment.

FIG. 3 is an explanatory diagram of a method of forming a coil of a proposed example.

FIG. 4 is an explanatory diagram of a proposal example of manufacturing a deflection coil by stacking multi-core parallel conductive wires.

FIG. 5 is an explanatory view of various forms of a multi-core parallel conducting wire.

FIG. 6 is an explanatory diagram of a coil winding state of a conventional deflection coil.

FIG. 7 is an explanatory diagram of an example of a bobbin of a conventional deflection coil.

FIG. 8 is an explanatory diagram of a general deflection yoke.

[Explanation of symbols]

 2 Bobbin 4 Insulating layer 5 Coil winding groove 10 Bottom 12 Pressing die 15 Multi-core parallel conductor 18 Magnetic field generator 20 Thermoplastic adhesive layer

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01J 9/236 H01F 41/04 H01F 41/06

Claims (2)

(57) [Claims] 1. After laminating and winding a coil winding around a winding groove of a coil bobbin, a DC or pulsating current is applied to the laminated and wound coil winding, and a front side or a back side of the coil bobbin.
Magnetic field across the coil windings
The generated, the coil winding frame for coil windings by the force generated by the law left off lemmings applied to the coil windings
A method for forming a coil, wherein the coil is pressed against the bottom side of the winding groove and the laminated coil winding is bonded and fixed in a state where the coil winding is pressed. 2. The method according to claim 1, wherein the coil winding is a multi-core parallel conductive wire.