JPS61142704A - Small-sized coil - Google Patents

Abstract

PURPOSE:To prevent short-circuiting and thereby enhance reliability in the maintenance of a small-sized coil by fixing terminals to one end flange of a drum-type core, connecting coil leads to the terminals, bending the connections roughly at right angles along the side surface of the coil and fixing two semicircular pieces of magnetic alloy material onto the side wall of the coil. CONSTITUTION:Two terminals 4, 5 are firmly fixed to the outer surface of one flange of a drum-type core 1. After coil leads 6a, 6b which start and finish winding of a coil 6 around the core 1 have been wound around and soldered to the lead connections 4c, 5c of the terminals 4, 5 respectively, the lead connections 4c, 5c are bent at right angles along the side surface of the coil 6. Finally this side surface of the coil layer is fitted with two semicircular pieces of magnetic alloy material 2, 3, the cutted parts 2a, 3a of which are placed at the positions that surround the extruded terminal outputs 4a, 5a and the gaps 9, 10 are placed to interpose the lead connections 4c, 5c bent towards the soil. The connections 4c, 5c are coated and fixed in this state with an adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a small coil used in various electronic devices.

(Prior Art) Conventionally, small coils as shown in FIGS. 3 and 4 have been proposed. That is, terminal mounting grooves 7 and 8 are formed in one of the flanges 1a of a drum-shaped core 1 having flanges 1m and 1b at both ends.
The terminal 4 shown in Fig. 3) is provided in this mounting groove 7°8.
Insert 5 and secure with adhesive. The coil 6 is wound around this drum-shaped core 1 (see Fig. 3(b)), and the coil leads 6a and 6b, which are the beginning and end of winding of the coil 60, are connected to the lead connection parts 4c and 5c of the terminals 4.5. The wire is wound and connected by soldering, and the lead connecting portions 4c and 5c are bent at right angles in the direction of the coil 6 (see FIG. 3(c)).

From the opposite side of the terminal fixed end surface of this drum core 1, see Figure 3 (
The approximately cylindrical magnetic alloy 11 shown in d) is fitted so that the notch window 11a and the gap 11b are located at the bent lead connection parts 4c and 5c, and glued to the gap 11b. The small coil shown in FIG. 4 is completed by applying an agent or the like and fixing it.

(Problems to be Solved by the Invention) However, in the small coil configured in this way, the lead connection portion 4c is bent at right angles toward the coil 6;
There is a problem in that there is a very high risk that the notch window 11a of the fitted magnetic alloy 11 will be short-circuited due to solder tearing due to soldering of the lead connection portion.

The present invention eliminates the above-mentioned drawbacks and provides a small coil that does not cause a short circuit between the lead connection part and the notch window of the magnetic alloy when the magnetic alloy is fitted, and improves reliability. It is something.

(Means for solving the problem) In order to solve the above problem, a terminal is fixed to one collar of the drum-shaped core, a coil lead is connected to the lead connection part of the terminal, and then the lead connection part is omitted. Two semicircular arc-shaped magnetic alloys are placed and fixed to the sides of a coil body bent at right angles with a gap between them.

(Function) By configuring as described above, the lead connecting portion can be positioned in the gap between the two magnetic alloys, creating a space between the lead connecting portion and the magnetic alloy. This eliminates the risk of short circuits and increases reliability.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. 1 is a drum-shaped core having flanges la and lb at both ends, and two terminal grooves 7 and 8 are formed on the outer surface of one of the flanges 1a of the drum-shaped core 1. This terminal groove 7,
8 includes fixing parts 4b and 5b that are fitted into the terminal grooves 7°8 and fixed with adhesive or the like, and the fixing parts 4b'
, 5 b Lead connection portion 4c protruding from one end of 5 b
c, and terminal pull-out portions 4a and 5 protruding from the other end on the opposite side.
Terminals 4 and 5 (see FIG. 1(,)) consisting of a and a are assembled and fixed.

These terminals 4 and 5 may be made by punching a metal plate into individual pieces, but in order to mass produce the metal 7-f
It is more advantageous to use wood.

A coil 6 is wound around the drum-shaped core 1 (see Fig. 1).
b)), the coil leads 6a and 6b at the beginning and end of the 60th turn of the coil are connected to the lead connection parts 4c and 5c of the terminals 4 and 5.
After the lead connection parts 4c and 5c are bent at right angles in the direction of the coil 6 (the first
(See figure (c)). On the side surface of the coil body assembled in this way, there is a terminal pull-out portion 4c having the semicircular arc-shaped magnetic alloy materials 2 and 3 shown in FIG.

The lead connecting portion 4c is located at 5c and the gap portion 9.10 is bent at right angles toward the coil. Then, the small coil shown in Fig. 2 is completed. (Effect of the invention) As described above, the small coil of the present invention uses two semicircular arc-shaped magnetic alloy sheets instead of the cylindrical magnetic alloy, and the gap Since the structure is such that the lead connection part is located in the part where the lead connection part is bent at right angles, there is no risk of a short circuit due to contact between the lead connection part bent at right angles and the magnetic alloy, and the production process is almost the same as before, and is more reliable. The properties are improved and the quality is also excellent.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a small coil according to an embodiment of the present invention in the process of being assembled; Fig. 2 is a perspective view of the finished product; Fig. 3 is a perspective view of a conventional small coil in the process of being assembled; The figure is a perspective view of a conventional finished product. 1...Drum-shaped core, 1a, lb...Brim, 2,3
...Magnetic alloy, 2a, 3a...Notch window, 4,5.
...Terminal, 4a, 5a...Terminal drawer, 4b, 5b
...Fixed part, 4c, 5c...Lead connection part, 6
...Coil, 6a, 6b...Coil lead, 7.8
...Terminal groove, 9.10... Gap part. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] Two terminal mounting grooves provided on the outer surface of one brim of a drum-shaped core having brim at both ends include a fixing part that is fitted into the mounting groove and fixed with adhesive, and a terminal extending outward from one end of the fixing part. Attach two terminals each consisting of a terminal pull-out portion extending to the terminal and a lead connecting portion protruding outward from the other end of the fixing portion, and connect the lead of the coil wound around the drum-shaped core to the lead. At the same time, two semicircular arc-shaped magnetic alloy sheets are attached to the side surface of the coil body, which is formed by bending the lead connection part at a substantially right angle toward the coil, so that the lead connection part is located in the gap part. A small coil characterized by being placed and fixed through a gap.