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Wound Chip Common Mode Choke Coils

A common mode choke coil and winding technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problems of lower reliability of press-fit, easy disconnection, electrode short circuit, etc., to avoid withstand voltage Deterioration or poor insulation, preventing wire breakage, preventing short-circuiting of electrodes

Inactive Publication Date: 2012-02-08
TOKYO PARTS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in order to prevent wire breakage due to external stress, etc., it is extremely important to minimize the wiring in the air, but if Figure 10 in the structure shown Figure 11 The aerial wiring part 102 shown in black in the middle becomes longer, and there is a problem that disconnection is likely to occur.
[0009] and, if Figure 10 In this structure, the end of the winding wire moves along the upper side of the inclined plane 101, and there is a risk of misalignment of the wiring position. When the electrodes are short-circuited, or the withstand voltage is deteriorated or the insulation is poor
In addition, when the winding wire 92a moves, on the contrary, due to the design of the inclined plane 101, it becomes easy for the wiring to move upward along the inclined plane 101 of the leg-shaped electrode portion 93b. Cause withstand voltage-deterioration or poor insulation
In addition, if the terminal moves on the leg-shaped electrode part, there is a problem that the bonding reliability when connecting the terminal on the leg-shaped electrode part becomes low.

Method used

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  • Wound Chip Common Mode Choke Coils
  • Wound Chip Common Mode Choke Coils
  • Wound Chip Common Mode Choke Coils

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach example

[0038] figure 1 It is a perspective view showing the structure of the core constituting the chip-wound common mode choke coil of this example, figure 2 yes means figure 1 A perspective view of the state of the electrode film is provided on the core, image 3 is a plan view of the wire-wound chip common mode choke coil of this example, Figure 4 yes means image 3 Stereoscopic view of important parts of Figure 5 yes image 3 Sectional view of A-A in the middle. and Figure 4 and Figure 5 The electrode film is omitted.

[0039] Such as figure 1 As shown, the core 10 constituting the chip-type common mode choke coil of this example is formed of ferrite (ferrite), and flange portions 12 are provided on both end sides of the winding core portion 11 . Then, grooves 13 are provided on collar portion 12, and electrode film 14 is supplied to each of the formed four leg portions by a dipping method or the like to form four leg-shaped electrode portions 15a to 15d. (refe...

no. 2 Embodiment approach example

[0052] Figure 7 is a perspective view showing the structure of the core constituting the chip-wound common mode choke coil of this example, Figure 8 It is a plan view of the wire wound chip type common mode choke coil of this example. and, Figure 7 and Figure 8 neutralize figure 1 and image 3 Parts marked with the same symbol represent the same part or corresponding parts. and, in Figure 7 and Figure 8 The electrode film of the foot-shaped electrode portion is omitted.

[0053] The basic structure of the chip-wound common mode choke coil of this example is the same as that of the first embodiment, and the differences will be described below.

[0054] In the wiring portion after winding in the first embodiment, only the stepped portions 17a, 17d are formed on the leg-shaped electrode portions 15a, 15d connecting the ends of the long winding wire 31a, but the leg-shaped electrode portions 15b, 15c are similarly formed in this example. A stepped portion 17b and a...

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PUM

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Abstract

The object of the present invention is to provide a highly reliable winding sheet that minimizes the wiring in the air, eases the bending of the terminal, and can reduce the stress applied to the terminal, and is less likely to cause poor insulation due to broken wires or peeling of the film. A type common mode choke coil, which has: a winding core part (11); a flange part (12), and a plurality of leg-shaped electrode parts (15a-15d) are formed on the aforementioned winding core part (11) with predetermined intervals between them. On both ends of the side; a plurality of winding wires (21a, 21b), winding the aforementioned winding core (11) and the ends connected to the aforementioned foot-shaped electrode portions (15a-15d), characterized in that: the aforementioned foot-shaped electrode portion (15a - 15d) has a convex curved surface (16a - 16d) on at least a part of the electrode formation region connecting the ends of the winding wires (31a, 31b).

Description

technical field [0001] The present invention relates to a small, surface-mountable, wirewound chip-type common mode choke coil used in various circuits. Background technique [0002] Chip-type common mode choke coils constructed, for example, Figure 9 (a) is wound on the winding core 91 of the drum core (drum core) shown in (a). Figure 9 Both ends of the two winding wires 92a and 92b shown in (b) are electrically connected to the leg-shaped electrode portions 93a to 93d provided on the collar portions at both ends of the winding core portion 91 by thermocompression bonding or the like. [0003] However, when the ends of the winding wires 92a and 92b (the portions where the conductors are exposed except the coating) are connected to the respective leg electrode portions 93a to 93d, for example, the end of one winding wire 92a is in contact with the leg electrode to be connected. The foot-shaped electrode portion 93b of the portion 93a is short-circuited (refer to Figure 9 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/29H01F27/28
Inventor 松本和博
Owner TOKYO PARTS IND CO LTD