JP3475501B2 - Method of manufacturing saddle type deflection coil - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a saddle type deflection coil used for a deflection yoke. 2. Description of the Related Art A saddle type deflection coil 1 as shown in FIG.
For example, it is manufactured using a mold 2 as shown in FIG. This mold 2 has an inner mold 3 and an outer mold 4, which are fitted to each other to form a gap 5, and a coil winding 6 is wound in the gap 5 to form a saddle type as shown in FIG. Is formed. [0005] As shown in FIG. 5, an outer periphery of a metal wire 7 such as copper is coated with an insulating layer 8.
In this case, a thermoplastic adhesive layer 10 such as a hot melt material is formed on the outer periphery. FIG. 2 shows a coil winding 6 in a gap 5 of a mold 2.
To the distribution portion of the saddle type deflection coil 1 (for example, A in FIG. 4).
(A section) is shown in a wound state. As shown in (a) of the figure, when the coil winding 6 is wound around the mold 2, the coil is at the separate side position of the coil. Since only an extra W portion protrudes from a certain press line position 11 and is wound, usually, at the end of winding of the coil winding 6, in this state, a current flows from the terminal side of the coil winding 6, and heating is performed. The adhesive layer 10 of each coil winding 6 is softened and melted, the push gauge 13 is pushed in from the opening end 12 side of the gap 5 and the protruding coil portion is pushed into the press line position 11 to adjust the coil shape, and the coil winding 6 is formed. The saddle type deflection coil is manufactured by bonding and integrating. In manufacturing the saddle type deflection coil 1, the coil winding 6 is not always wound by one wire, and a plurality of coil windings are wound together and the saddle type coil shape is formed in the mold 2. Are formed, current is applied in the same direction from the terminal side of the plurality of coil windings 6 to conduct and heat, and the respective coil windings are bonded and integrated. Generally, in the state shown in FIG. 2A in which the coil winding 6 has been wound in the gap 5 of the mold 2, the coil winding 6 is in a rough state. It is housed in a wound. Ideally, as shown in FIG. 2B, it is desirable that the coil winding 6 is uniformly and densely wound and accommodated in the gap 5 of the mold 2. In the state where the winding 6 is wound, the coil winding 6 is in a coarse winding accommodation state. In particular, since the coil winding 6 is hard to enter the leading end side (the window side of the coil) of the gap 5, it is particularly rough. State. In this state, when the push gauge 13 is pushed in, the coil winding 6 is pushed toward the leading end side of the gap 5, so that the coil winding 6 becomes dense. A winding accommodation state near ideal as shown in FIG. However, when energizing and heating the coil winding 6 to bond and integrate the coil winding 6, not only when the coil is wound with one coil winding, but also when a plurality of coil windings are wound. Even when the coils are formed by winding the wires together, as shown in FIG. 3A, in order to allow the current to flow in each coil winding from the same direction, the adjacent coil windings 6a and 6b have the same direction. As a result of the flow of the current, a magnetic field in the same direction clockwise with respect to the direction of the current is generated from the coil windings 6a and 6b, and this magnetic field causes the mutual coil windings 6a and 6b to be in accordance with Fleming's left-hand rule. A force F in the direction of attracting acts. Considering the whole coil winding wound and accommodated in the gap 5 based on this principle, FIG.
As shown in, the distal end side of the coil winding of the gap 5 and a force F ₁ toward the center side, also the force F ₂ is acting toward the center direction in the coil winding of the open end 12 side of the gap 5 By these forces F ₁ and F ₂ , the coil windings 6 in the gap 5 are gathered toward the central area C, and as a result, the coil windings 6 are particularly coarse on the tip side of the gap 5, In the case of C, the coil is in a very dense state, and after the winding of the coil winding 6 is completed, the push gauge 13 is pushed in to adjust to the shape of the gap 5 of the bent mold 2 so that a substantially uniform winding accommodation state is obtained. In addition, there arises a problem that the distribution form of the coil windings 6 is destroyed by the electric heating. Even when the distribution design of the saddle type deflection coil is performed using a simulation technique, the simulation is performed on the assumption that a coil having a uniform coil winding distribution having the same shape as the shape of the gap 5 of the mold 2 is formed. Although it is very advantageous if it can be performed, as described above, if the distribution form of the coil windings is destroyed due to the heating of the coil windings 6, the design technique by such a simulation becomes difficult,
This will hinder new development of saddle type deflection coils. When the distribution of the coil windings collapses due to the heating of the coil windings 6 and the leading end of the gap 5, that is, the window side of the saddle type deflecting coil 1 becomes particularly rough, the coil window side portion is reduced. The distribution of the deflection magnetic field changes in the pin (pin magnetic field) direction, and the barrel magnetic field as designed cannot be obtained.
There arises a problem that the product performance as a deflection coil deteriorates. 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 prevent the coil winding distribution form from being collapsed by the influence of electromagnetic force at the time of energizing and heating the coil winding, and to achieve a design as designed. An object of the present invention is to provide a method of manufacturing a saddle-type deflection coil capable of obtaining a distribution form of coil windings. The present invention has the following configuration to attain the above object. That is, the present invention provides a saddle-shaped coil winding by winding a coil winding in which an insulating layer is formed on the outer periphery of a metal wire and a thermoplastic adhesive layer is formed on the outer periphery of the insulating layer. In the method of manufacturing a saddle-type deflection coil in which the coil windings are energized, and the energized heating softens and melts the adhesive layer of the coil windings to bond and integrate the coil windings, a plurality of coil windings are joined together. By winding, the ends of the plurality of coil windings wound together are divided into equal or substantially equal parts, and the coil windings on one side and the other side of the division are divided. The coil windings are bonded and integrated by applying currents in opposite directions to each other. According to the present invention having the above-described structure, a plurality of coil windings are wound together to form a saddle-shaped coil shape, and then the coil windings which are substantially equally divided are sequentially turned from one end of the terminal. By passing a current in one direction and a current in the opposite direction to the other end, the magnetic fields generated from the coil winding on one side and the coil winding on the other side cancel each other out. Fit. Therefore, it is possible to prevent the generation of an electromagnetic force attracting each other between the coil windings formed in a saddle-shaped coil shape, and it is possible to prevent the coil windings from receiving the electromagnetic force and disturbing the distribution form during energization and heating. Thus, a saddle-type deflection coil having a winding distribution form as designed is manufactured. Embodiments of the present invention will be described below with reference to the drawings. In the following description of the embodiments, the same reference numerals are given to the same parts as those in the conventional example, and the overlapping description will be omitted. In the present embodiment, for example, a coil winding 6 is wound around a gap 5 of a mold 2 as shown in FIG. At the end of the winding of the coil, the adhesive coating of the coil winding is thermally melted by energizing and heating the coil winding, and before and after that, as shown in FIG. The coil portion W protruding toward the opening end 12 side of the gap 5 is pushed into the regular coil shape by using the gauge 13 and is integrally bonded and fixed. Two coil windings 6 are wound together in the gap 5 of the mold 2, and as shown in FIG. 1A, two terminals S ₁ and S ₂ on the winding start side and a terminal E on the winding end side. _1, E ₂ of the two coil windings 6a adjacent wound together by applying a current from each one side, each other 6b Is that as the direction of current flow. [0015] In FIG. 1 (a), the winding start terminal S ₂ side, the winding current flows from the terminal E ₁ side of the end side, the two coil windings 6a wound together, opposite directions 6b To allow the current to flow (same thing,
A reverse current may be supplied to S ₁ and S ₂ , or as shown in FIG. 1B, one end may be short-circuited and the other end (S ₁ and S ₂ sides in the figure) may be energized. May be). in this way,
When the current flows in the opposite direction, as shown in FIG.
As a result of the magnetic field emanating from the coil winding 6a and the magnetic field emanating from the coil winding 6b being reversed, the respective magnetic fields are canceled and disappear, and therefore, between the coil windings 6a and 6b according to Fleming's left-hand rule. Force F attracting each other
_1, F ₂ does not occur. Therefore, the coil winding 6 wound and accommodated in the gap 5 of the mold 2 has a force directed toward the center between the window side and the opening end side of the coil winding 6 as shown in FIG. F ₁ , F ₂
Does not act, and as a result, the distribution of the coil winding wound and accommodated in the gap 5 does not collapse at the time of energization heating, and the coil windings 6a and 6b are In a uniform density state, the mold 2
In the same cross-sectional shape as the gap 5. According to the present embodiment, the shape of the saddle type deflection coil is formed to be equal to the cross-sectional shape of the gap 5 of the mold 2, so that the shape of the gap 5 of the mold 2 is Simulation can be performed, and when developing new saddle-type deflection coil products, simulation can be performed using the cross-sectional shape of the coil winding winding accommodation space of the mold. It is extremely easy to develop new products by coil simulation, which is very advantageous in researching and developing coil products. Further, the distribution of coil windings on the tip side of the gap 5 of the mold 2, that is, on the window side of the saddle-type deflection coil is roughened by the electromagnetic force at the time of energization and heating, and the deflection magnetic field shifts in the pin direction. It is possible to obtain a barrel magnetic field distribution according to a desired simulation design, and to provide a saddle type deflection coil having excellent coil performance. The present invention is not limited to the above embodiment, but can take various embodiments. For example, in the above embodiment, the saddle-type deflection coil is manufactured by winding and housing the two coil windings 6a and 6b together in the gap 5 of the mold 2, but a plurality of coil windings other than the two are used. 6 may be wound together to produce a saddle type deflection coil. In this case, if the number of coil windings is set to an even number, the number of coil windings that allow current to flow in the forward direction can be equal to the number of coil windings that allow current to flow in the reverse direction when conducting heating. Preferably, an even number of coil windings 6 are wound together. However, even when an odd number of coil windings 6 are wound, for example, when five are wound together, the terminal can be divided into two and three, and when seven coil windings are wound together. Since the coil terminal can be divided into three and four coils with a difference of one, the magnetic field generated from the split one-sided coil winding and the magnetic field generated by the opposite current on the other side are divided. Even if they can almost cancel each other out, even if they cannot completely cancel each other out, the difference is only the magnetic field of one coil winding, so that the effect of the electromagnetic force generated thereby can be reduced, and the The influence of the collapse of the coil winding distribution pattern can be suppressed to a minimum, and it is possible to provide a saddle-type deflection coil that is far superior to the conventional example. In the above embodiment, a method of manufacturing a saddle-type deflection coil using the mold 2 has been described. However, a saddle-type deflection coil of this type of deflection yoke has, for example, a saddle-type deflection coil as shown in FIG. Coil 6 in the coil winding groove 15 of the bobbin 14
Are wound together to form a saddle-shaped coil form, and then, in a deflection yoke that needs to be heated and energized to apply some bonding means to the copper wire, in this state, the deflection yoke is equally divided (substantially equal) as in the previous embodiment. By passing a forward current from one end of the coil winding and a reverse current to the other end of the coil winding, there is also no effect of electromagnetic force due to Fleming's left-hand rule A saddle-type deflection coil can be manufactured. As described above, when the coil winding 6 is wound around the bobbin 14 to manufacture a saddle type deflection coil, each coil winding 6
When a current in the same direction is applied to the coil windings, an electromagnetic force attracting each other acts between adjacent coil windings in the same manner as in the above-described conventional example, and the winding distribution of each coil winding in the coil winding groove 15 is disrupted, and a deflection magnetic field is generated. The distribution pattern of the coils deteriorates, and it becomes impossible to form a coil having a coil winding distribution conforming to the cross-sectional shape of the coil winding groove 15, which is a major factor of winding variation. By winding the wire 6 together in the coil winding groove 15, a forward current flows from one side of the equally divided terminal side, and a reverse current flows to the other side of the terminal side. Distortion of the winding distribution can be prevented, and similarly to the saddle type deflection coil of the present embodiment using the mold 2, deterioration of the distribution form of the deflection magnetic field can be prevented.
It is possible to provide a bobbin wound saddle type deflection coil having a stable winding. Further, the coil winding 6 is not necessarily limited to a single wire, and may be a wire using a stranded wire composed of a plurality of wires such as a litz wire. For example, when winding one litz wire of 20 twists Alternatively, it may be equally divided into 10 to 10 wires (or 11 to 10 wires when 21 wires are twisted), and a reverse current may be supplied to one terminal and the other terminal. According to the present invention, a plurality of coil windings are wound together to form a saddle-shaped coil shape, and thereafter, the plurality of terminals wound together are equally (or substantially) divided. The coil windings on one side and the coil winding on the other side are supplied with currents in opposite directions to each other, so that the coil windings are bonded and integrated by conduction heating. Therefore, during this heating, the magnetic field generated from the coil winding in which the current flowing in one direction flows together and the magnetic field generated from the coil winding in which the current flowing in the opposite direction cancels out and disappears. In addition, the electromagnetic force that draws from both the separate side and the window side to the center side does not act on the entire coil winding during energization heating, and the distribution form of the coil winding does not collapse due to the electromagnetic force. As described above, since the coil winding distribution pattern does not collapse, it is possible to manufacture a saddle type deflection coil having the designed coil winding distribution pattern. It is possible to provide a saddle type deflection coil having excellent performance. Further, since the coil winding distribution is not distorted, the coil winding distribution is formed in accordance with the cross-sectional shape of the gap around the die for winding the coil winding and the cross-sectional shape of the coil winding groove of the bobbin. This makes it possible to more accurately perform the simulation analysis of the saddle-type deflection coil using the cross-sectional shapes of these gaps and grooves, thereby making it extremely easy to develop and analyze the saddle-type deflection coil.
This is very advantageous in the development (product development) of saddle type deflection coils.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing one embodiment of the present invention. FIG. 2 is an explanatory view of various states of a coil winding distribution mode when a saddle type deflection coil is manufactured using a mold. FIG. 3 is an explanatory diagram showing the direction of current flowing in adjacent coil windings of a saddle type deflection coil and the state of generation of an electromagnetic force in a comparison between the case of the present embodiment and the case of a conventional example. FIG. 4 is an explanatory view of a general saddle type deflection coil. FIG. 5 is a sectional view of a coil winding forming a saddle type deflection coil. FIG. 6 is an explanatory view of a bobbin for a saddle type deflection coil. FIG. 7 is an explanatory view of a general mold for producing a saddle type deflection coil. [Description of Signs] 1 Saddle-type deflection coil 2 Mold 5 Clearance 6, 6a, 6b Coil winding

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-124654 (JP, A) JP-A-63-150830 (JP, A) JP-A-5-290731 (JP, A) JP-A-58-1983 119137 (JP, A) Japanese Utility Model Showa 64-55543 (JP, U) Japanese Patent Publication No. 38-717 (JP, B1) Japanese Patent Publication No. 49-8207 (JP, B1) (58) Field surveyed (Int. ⁷ , DB name) H01J 9/236 H01F 41/00

Claims (1)

(57) [Claim 1] A coil winding in which an insulating layer is formed on the outer periphery of a metal conductor and a thermoplastic adhesive layer is formed on the outer periphery of the insulating layer are wound in a saddle shape. After the saddle-shaped coil shape, the coil winding is energized, and the energized heating softens and melts the adhesive layer of the coil winding to bond and integrate each coil winding. By winding this coil winding together, it becomes a saddle-shaped coil shape,
The ends of the plurality of coil windings wound together are equally or almost equally divided, and currents in opposite directions are supplied to the coil winding on one side and the coil winding on the other side of the division. A method of manufacturing a saddle-type deflection coil, wherein the coil windings are bonded and integrated by the above method.