JPH0644533B2 - Inductance element - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductance element having a lead terminal.

2. Description of the Related Art In recent years, with the automatic insertion of components, it has become more common to deliver an inductance element in a taping state to a set maker. In addition, demands for downsizing and price reduction have become very strong.

The conventional inductance element will be described below.

FIG. 5 is a perspective view of a conventional inductance element.
In FIG. 5, 1 is a drum-shaped magnetic core, and 2 and 2'are lead terminals, which are conventionally about 6 mm in length because they are manually inserted into a printed circuit board. Reference numeral 3 denotes a winding portion in which a copper wire with an insulating film (hereinafter abbreviated as copper wire) is wound around the winding groove of the drum-shaped magnetic core 1. Both ends 4, 4'of the winding are wound portions 5, 5 '(hereinafter referred to as "winding portions"). , And the lead terminals 2 and 2 ′ are separately wired, and then electrically connected by soldering or the like.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, since the winding portion 3 and the wiring portion 5 are not coaxial, the mechanism of the automatic winding wire machine is complicated, and the price of the automatic winding wire machine is low. As the cost increases, the time required for the winding wiring process increases, which is a problem. If the lead terminals 2 and 2'are made long in order to make the inductance element have taping specifications, the nozzle (copper wire outlet) has two leads when wiring to the lead terminals 2 and 2'with an automatic winding wire machine. Since it is difficult to pass between the terminals 2 and 2 ', automatic wiring becomes extremely difficult.

The present invention solves the above-mentioned conventional problems, improves the wiring structure of the inductance element, simplifies the mechanism of the automatic winding wire machine, and reduces the time of the winding wire wiring process. It is an object of the present invention to provide an inductance element that can meet taping specifications.

Means for Solving the Problem In order to solve this problem, the inductance element of the present invention is configured such that a copper wire wound around a drum-shaped magnetic core is wired so that both ends of the copper wire straddle two lead terminals. After electrically connecting both ends of the winding, a part of the wiring portion between the two lead terminals is removed.

Action With this configuration, the winding to the drum core and the wiring to the lead terminal can be performed coaxially,
The mechanism of the automatic winding and wiring machine can be greatly simplified, and by simply moving the nozzle in parallel with the axis of the drum-shaped magnetic core, the wiring process changes to the winding process, and vice versa. Since it can be transferred, the time required for the winding wiring process can be significantly shortened. Furthermore, in the wiring process, since it is not necessary for the nozzle to pass between the two lead terminals, wiring can be performed under the same conditions as when the lead terminals are short even if the lead terminals are long. However, automatic wiring can be easily realized.

Examples Examples of the present invention will be described below with reference to the drawings.

1 and 2 are perspective views of an inductance element according to an embodiment of the present invention. FIG. 1 shows a semi-finished product and FIG. 2 shows a completed product.

In FIG. 1, 11 is a drum-shaped magnetic core, 12 and 12 'are lead terminals, 13 is a winding portion in which a copper wire is wound in a winding groove of the drum-shaped magnetic core 11, and both ends 14 and 14' are two. The lead terminals 12 and 12 'are wound so as to straddle the lead terminals 12 and 12' at the same time, and after the wiring portion 15 is formed, electrical connection is made by soldering or welding.

2 shows a portion of the wiring portion 15 in FIG. 1 removed,
This shows the completed product. In FIG. 2, 1
Reference numeral 6 denotes a void portion obtained by removing a part of the wiring portion 15 and is provided to eliminate a short circuit between the two lead terminals 12 and 12 '.

FIG. 3 is a perspective view of an inductance element showing a second embodiment of the present invention. In the figure, reference numeral 17 is a wiring groove provided in the flange portion of the drum-shaped magnetic core, and the copper wire ends of 14 and 14 'are wired to the lead terminals 12 and 12' through the wiring groove 17 to form a copper wire. It is provided to prevent both ends of the wire from directly adhering to each other to prevent a short circuit.

FIG. 4 is a sectional view of an inductance element showing a third embodiment of the present invention. In the figure, 18 is a lead terminal 1.
A terminal plate made of resin to which 2, 12 'are attached and 19 are high melting point solders. The method of forming the inductance element by adhering the drum-shaped magnetic core 11 to the resin-made terminal plate 18 has been conventionally performed, but this method can also be applied to the present invention. Also, the lead terminals 12, 12 '
The high melting point solder 19 is used as a method for electrically connecting both ends of the copper wire and the copper wire. This is because when the inductance element of the present invention is soldered to the printed board, the solder of the wiring portion 15 is remelted, In order to prevent the lead terminals 12 and 12 'from coming off, they are not melted at a normal soldering temperature (260 ° C. or lower).

In addition, the lead terminals 12, 12 'and both ends 14, 1 of the copper wire
As a method for electrically connecting 4 ', other methods such as an electric welding method, a bonding method using ultrasonic waves, and a method of removing the insulating coating of the copper wire and then connecting with a conductive adhesive can be considered. May be used.

Further, in the embodiment shown in FIGS. 1 to 4, the drum-shaped magnetic core 11 is used.
Although ferrite is assumed as the material of the above, it goes without saying that other materials such as alumina, ceramics, resin, etc. may be used.

Further, in order to protect the completed product shown in FIG. 2, normally, the main body of the inductance element excluding the lead terminals 12 and 12 'is covered with an insulating resin or a heat shrinkable tube. It goes without saying that these exteriors may be provided.

EFFECTS OF THE INVENTION As described above, according to the present invention, both ends of the winding are wired so as to straddle the two lead terminals, and the lead terminal and the both ends of the winding are electrically connected. Since the inductance element is formed by removing a part of the wiring portion, the following excellent effects can be obtained.

(1) Since the winding to the drum type core and the wiring to the lead terminal can be done coaxially, the mechanism of the automatic winding wire machine can be greatly simplified, so the automatic winding wire machine can be manufactured at low cost. can do.

(2) Simply move the nozzle in parallel with the axis of the drum core,
Since it is possible to move from the wiring process to the winding process and conversely from the winding process to the wiring process, the time required for the winding wiring process can be significantly shortened.

(3) Since it is not necessary for the nozzle to pass between the two lead terminals in the wiring process, automatic wiring can be easily realized even if the lead terminals are long.

(4) Since it is not necessary for the nozzle to pass between the two lead terminals in the wiring process, automatic wiring can be easily realized even if the distance between the lead terminals is small, and the inductance element can be easily miniaturized.

(5) Since the wiring part at the base of the lead terminal is much thicker than the conventional product and the cross section is not circular, the strength of the lead terminal becomes extremely large when it is covered with insulating resin.
It is possible to obtain an inductance element in which disconnection does not easily occur.

[Brief description of drawings]

1 and 2 are perspective views of an inductance element according to a first embodiment of the present invention. FIG. 1 is a semi-finished product, and FIG.
The figure is a completed product, FIG. 3 is a perspective view of an inductance element according to the second embodiment of the present invention, FIG. 4 is a sectional view of the inductance element according to the third embodiment of the present invention, and FIG. It is a perspective view of an element. 11 ... Drum type magnetic core, 12, 12 '... Lead terminal,
13 ... Winding part, 14, 14 '... End of copper wire, 15 ...
... winding part (wiring part), 16 ... void part, 17 ... wiring groove, 18 ... terminal plate, 19 ... high melting point solder.

Claims (4)

[Claims] 1. A drum-shaped magnetic core is provided with two lead terminals on one flange, a copper wire with an insulating coating is wound in a winding groove of the drum-shaped magnetic core, and both ends of the winding are the two leads. An inductance element that is wound around a terminal at the same time, electrically connects both ends of the lead terminal and the winding, and then removes part of the winding part between the two lead terminals. 2. The inductance element according to claim 1, wherein the flange portion of the drum-shaped magnetic core is provided with a plurality of grooves, and both ends of the winding are wound around the lead terminals along the separate grooves. 3. The inductance element according to claim 1, wherein a resin terminal plate having lead terminals attached thereto is fixed to the flange portion of the drum-shaped magnetic core. 4. The inductance element according to claim 1, wherein the lead terminal and both ends of the winding are electrically connected with a high melting point solder.