JPH0283906A - Troidal coil device and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a toroidal coil which is easy in winding by coupling first and second cases which stored core half bodies, respectively, freely in opening and closing with a hinge, and coiling winding through a case. CONSTITUTION:First and second core half bodies 1a and 1b are stored in the first and second cases 2a and 2b. Next, two insulated covered wires 13a and 13b are wound round the cases 2a and 2b in parallel so as to obtain windings 3a and 3b. The coiling around it is easy as it is done in the condition where the cases 2a and 2b are opened to 180 deg.C. Next, with a hinge 7 as the center the cases 2a and 2b are rotated, and a hooking projection 11 is inserted into a hook hole 12 and both are fixed to each other. Hereby, the cases 2a and 2b and the core half bodies 1a and 1b also close making a ring core 1. The winding 3a of the completed coil to one side of a power source line and the winding 3b to the other side of the power source line are connected in series respectively and those are used for noise removal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a toroidal coil device suitable for a noise removal filter connected to a power line of an electronic device to remove noise, and a method for manufacturing the same.

[Prior Art] A conventional toroidal coil device for a noise removal filter consists of a ring-shaped ferrite core, a synthetic resin core case housing the ring-shaped ferrite core, and a winding wound around the ring-shaped ferrite core.

[The problem that the invention tries to solve! ] However, in such a toroidal coil device, it is necessary to wind the conducting wire multiple times from the center hole to the outer periphery of the ring-shaped ferrite core forming a closed magnetic circuit, and this winding is difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a toroidal coil device that can be easily constructed and a method for manufacturing the same.

[Means for Solving the Problems] A toroidal coil device according to the present invention for achieving the above object includes a ring-shaped magnetic core consisting of a combination of a first core half and a second core half; It consists of a first case part that houses the first core half and a second case part that houses the second core half, and the first case part is connected to the second case part. It consists of a core case that is hinged to be openable and closable, and a winding that is wound around the first and second core halves a plurality of times through the first and second case parts.

Further, the method for manufacturing a C-type toroidal coil device according to the present invention includes first and second coil devices for forming an annular magnetic core.
A core half body is prepared, the first case part having a first case part accommodating the first core half body and a second case part accommodating the second core half body, the first case part is the second
A core case is provided that is hinged to a case portion, the first core half is housed in the first case portion, and the second core half is housed in the second case portion. A plurality of conductive wires are inserted into the first and second core halves through the first and second case parts with the first case part opened relative to the second case part. After that, the first case part is wrapped around the second case part.
It is characterized by being closed to the case part of the case.

[Operation] In the above invention, although the core is divided into the first and second core halves, the first and second core halves are housed in the hinged first and second case parts. The halves can also be handled as one unit. The first and second core halves are annular in the completed state, but they can be opened together with the core case around the hinge, so that winding and recessing of the conductive wire can be performed in this open state. Therefore, winding of the conductor wire can be accomplished very easily. Moreover, when the winding is re-wound as necessary, the winding can be easily accommodated and removed from the core.

[Embodiment] Next, a toroidal coil device for a noise removal filter according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

This toroidal coil device consists of a magnetic core 1 made of ferrite, an insulating core case 2 made of a synthetic resin (nylon) injection molded body housing the magnetic core 1, a pair of windings 3a and 3b, and four wires. It consists of a terminal bin 4.

The ring-shaped core 1 has a semi-cylindrical first and second half shown in FIG.
is obtained by combining the core halves 1a and 1b.

, the core case 2 is connected to the first core half 1 as shown in FIG.
A first case portion 2a and a second core half 1 that accommodate a
and a second case portion 2b that houses the second case portion 2b. The first and second case parts 2a, 2b have recesses 5.6 for accommodating the first and second core halves 1a, 1b. Each recess 5.6 is formed so as to cover the pair f) side surfaces and outer peripheral surface of the core halves 1a, 1b. The first and second case parts 2a and 2b are connected by a hinge part 7 so as to be openable and closable. Note that the hinge portion 7 is a thin portion integrally molded with the first and second case portions 2a and 2b, and is made of synthetic resin.

The core case 2 further includes a pair of terminal portions 8.9, a locking protrusion 10, and a locking protrusion 11. The child parts 8.9 are parts that protrude outward from the main body part in which the recesses 5.6 are provided, and each support two terminal pins 4.

The locking protrusion 10 and the locking protrusion 11 are connected to the first case portion 2a.
This is a locking means for fixing the core case 2 and the second case portion 2b to each other, and is formed of synthetic resin on the core case 2 and the second case portion 2b. The locking protrusion 10, which can be elastically deformed, has a locking hole 12 as shown in FIGS. 8 and 9, and the locking protrusion 11
enters this locking hole 12.

The toroidal coil device is assembled as follows.

First, the first and second core halves 1a and 1b are housed in the first and second case parts 2a and 2b as shown in FIGS. 3 to 5.

Next, as shown in FIG. 1, two insulated conductor wires 13a,
13b in parallel, the first and second core halves 1a, 1b
The first and second case portions 2a, 2b accommodate
The windings 3a and 3b are obtained by winding the wires a plurality of times. The winding of the insulated conductors 13a and 13b is performed with the first case part 2a opened approximately 180 degrees with respect to the second case part 2b, so the winding is shorter than the winding of the conductor wire around the conventional ring-shaped core. It can be done quickly and easily.

Next, connect the tips of the insulated conductors 13a and 13b to the terminal bin 4.
Garageru. Insulated conductor f3 for this terminal bin 4
The tethering of a and 13b is done with the sheath still in place. Of course, it is also possible to remove the sheath of the insulated conductors 13a and 13b and tangle the conductor portion to the terminal pin 4, but in order to save the trouble of removing the sheath. Garage with the covering still attached. Note that the coating will be removed in a later step.

Next, the first case portion 2a is moved around the hinge portion 7.
is rotated relative to the second case portion 2b, and the locking protrusion 1
1 is inserted into the locking hole 12, and the two are fixed to each other as shown in FIG. First case portion 2al of locking protrusion 11
The pl end portion has an inclined surface 11a, and the corner portion 9 of the terminal portion 9
A is chamfered, and furthermore, the stop piece 10 is elastically deformed.

When the first case part 2a is closed with respect to the second case part 2b, the tip of the locking piece 10 smoothly rides over the locking projection 11, and the locking projection 11 automatically enters the locking hole 12.
When the first case portion 2a is closed to the second case portion 2b, the end surfaces of the first and second core halves 1a, 1b are brought into close contact with each other, forming a ring-shaped core 1.

Next, the portion of the terminal pin 4 is immersed in a molten solder bath to melt or burn off the insulation-covered conductor wires 13a and 13b, and the conductor portion is soldered to the terminal pin 4.

One winding 3 in the completed toroidal coil device
Winding a is connected in series to one of the pair of power supply lines, and the other winding 3b is connected in series to the other of the pair of power supply lines.

The toroidal coil device and method for manufacturing a coil according to this embodiment have the following effects.

(1) Since the insulated conductors 13a and 13b are wound with the first and second case parts 2a and 2b, which can be opened and closed, together with the first and second core halves 1a and 1b open, the winding 3a and 3b can be easily formed by automated equipment.

(2) Locking protrusion 1 provided on the first case portion 2a
0 and the locking protrusion 11 provided on the second case portion 2b establishes the closed state of the first and second case portions 2a, 2b, so assembly can be easily accomplished.

(3) Since the terminal portion 8.9 is provided in the core case 2 and the terminal portions of the windings 3a and 3b are tied there, terminal processing can be easily accomplished.

(4) Since the child bottle 4 is provided, mounting and connection to the circuit board can be easily accomplished.

(5) Since the insulation-coated conductors 13a and 13b are wrapped together with their coatings in the terminal bin 4 and the coating is then removed in a solder bath, the terminal connections of the windings 3a and 3b can be efficiently and automatically carried out. It can be carried out.

[Modifications] The present invention is not limited to the above-described embodiments, and, for example, the following modifications are possible.

(1) It can be a toroidal coil device having only one of the windings 3a and 3b.

(2) The hinge portion 7 and/or the terminal portion 8.9 can be formed in the main body of the gauge 2 and the body.

(3) The core 1 can be made of a magnetic material other than ferrite.

(4) The first and second case parts 2a and 2b may be provided with protrusions to prevent the first and second core halves 1a and 1b from coming off.

[Effects of the Invention] As described above, in both the apparatus and method inventions, windings can be easily formed.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the state of the toroidal coil device according to the embodiment of the present invention immediately after the windings are provided, Fig. 2 is a front view showing the completed toroidal coil device, and Fig. 3 is the core and the core. A plan view of the case, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along the line v-V in FIG. 3, and FIG. , 1b, FIG. 7 is a perspective view showing the core case in an open state, FIG. 8 is an enlarged plan view of the terminal portion and locking piece portion of FIG. 2, and FIG. 9 is a perspective view of the core case shown in FIG. 8. FIG. 2 is an enlarged sectional view taken along the line EX-IX. 1... Core, 1a... First core half, 1b...
Second core half, 2...core case, 2a...first
case part, 2b... second case part, 3a, 3
b... Winding wire, 4... Terminal bin, 7... Hinge part.

Claims (1)

[Scope of Claims] [1] An annular magnetic core consisting of a combination of a first core half and a second core half; a first case portion housing the first core half; and a first case portion housing the first core half; a second case part that accommodates a second core half, the first case part being hinged to the second case part so as to be freely openable and closable; A toroidal coil device comprising a winding wire wound a plurality of times around the first and second core halves via a second case portion. [2] Prepare first and second core halves for configuring an annular magnetic core, and a first case portion housing the first core half and housing the second core half. a second case portion;
providing a core case in which the first case portion is hinged to the second case portion; accommodating the first core half in the first case portion;
The second core half is accommodated in the second case part, and the conductor is inserted between the first and second case parts with the first case part open relative to the second case part. manufacturing a toroidal-type coil device, characterized in that: the first and second core halves are wound around the first and second core halves a plurality of times, and then the first case portion is closed with respect to the second case portion; Method.