Coil device
A coil device and coil technology, applied in the direction of transformer/inductor casing, etc., can solve problems such as aliasing, and achieve the effect of preventing cracks, good reliability, and satisfying miniaturization
Active Publication Date: 2010-07-14
TDK CORPARATION
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0023] However, here, if it is desired to form a plurality of coil parts sequentially by adopting a divided winding form without providing a flange, the winding wire of the coil part formed earlier may be distorted in the process of forming the next coil part.
Method used
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[0126] Next, first to fifth aspects of the present invention will be described with reference to the drawings.
[0127] 1st form of this invention
[0128] figure 1 is a longitudinal sectional view showing a coil device according to an embodiment of the present invention, figure 2 yes means figure 1 Front cutaway view of the coil assembly shown, image 3 yes means figure 1 and figure 2 An enlarged perspective view of the terminals used for the coil assembly shown. The coil device can be used in antennas, vehicle antennas, transponders, choke coils, inductors of electronic equipment, and the like.
[0129] refer to figure 1 and figure 2 , the coil device includes: a magnetic core 110 , a winding 104 , terminals 151 , 152 , and further includes an insulating resin 107 .
[0130] The magnetic core 110 has terminal mounting parts 121 and 122 at opposite ends thereof, and has a winding part 101 in the middle part. Among the magnetic cores 110, ferrite cores are represe...
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There is provided a coil apparatus which can increase mechanical strength of terminal portions and assure sufficient impact resistant properties and vibration resistant properties even in an application in a severe use environment such as an in-vehicle coil apparatus. Each of terminals 151 and 152 is formed of one metal sheet, and includes an attachment portion 911 or 921, an intermediate portion912 or 922 and a bottom portion 913 or 923. One end of the attachment portion 911 or 921 is fixed at each terminal attachment portion 121 or 122 of a core 110. One end of the intermediate portion 912or 922 is continuous with the other end of the attachment portion 911 or 921 at a first bent portion 1F1. The bottom portion 913 or 923 has one end which is continuous with the other end of the intermediate portion 912 or 922 at a second bent portion 1F2, faces the attachment portion 911 or 921, and has the other end as a free end. The intermediate portion 912 or 922 has a hole 914 or 924 in a plane thereof. In each hole 914 or 924, both inner edges which are opposed to each other in at least one direction have an arc shape.
Description
technical field [0001] The invention relates to a ferrite core and a coil device using the ferrite core. [0002] The coil device according to the present invention includes antennas suitable for vehicle-mounted transponders, etc., or inductors or choke coils for communication equipment. Background technique [0003] Conventionally, various types of coil devices have been proposed and put into practical use. As one of them, recently, a coil device applicable as an on-vehicle antenna or a transponder has been proposed. A coil device suitable for this purpose usually uses a ferrite core with good high-frequency characteristics. In addition, it is possible to obtain a structure in which a coil with a required number of turns is wound on the ferrite core, and the ends of the coil are connected to metal terminals provided at both ends in the longitudinal direction of the ferrite core, And the whole is covered with thermosetting resin such as epoxy resin. [0004] As the ferri...
Claims
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IPC IPC(8): H01F27/02
Inventor 山下充弘长坂孝三浦英树松川泰弘佐藤和男佐藤玲佐藤广宣伊东孝之北岛保彦
Owner TDK CORPARATION