IP Library › Granted Patent US 12683069
Granted Patent B2
US 12683069 · App. 17/704,612 · Granted Jul 14, 2026

Coil device

Inventors: Hideaki Harata (Tokyo, JP); Takuma Tanaka (Tokyo, JP); Masaru Kumagai (Tokyo, JP); Tomohiro Furuichi (Tokyo, JP); Satoshi Denda (Tokyo, JP)
Assignee: TDK CORPORATION
H01F27/325H01F27/2876
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Quick Facts
Patent No.
US 12683069
App. No.
17/704,612
Granted
Jul 14, 2026
Kind
B2
Abstract

A coil device including; a bobbin including a winding part wound with a first wire and a second wire around an outer circumference face of the winding part, and flanges and formed at ends of the winding part in an axis direction; and a terminal block formed separately from the bobbin and installed to the bobbin The terminal block is arranged at a position spaced away from the outer circumference face of the winding part in a direction perpendicular to the axis direction of the winding part.

Claims (62)

1 . A coil device comprising:

a bobbin including a winding part wound with a wire around an outer circumference face of the winding part, and a flange formed at an end of the winding part in an axis direction; and

a terminal block formed separately from the bobbin and installed to the bobbin; in which

the terminal block is installed to the bobbin at a position spaced away from the outer circumference face of the winding part in a direction perpendicular to the axis direction of the winding part,

wherein

the end comprises ends,

the terminal block is connected to one of the ends in the axis direction of the winding part and also connected to another one of the ends in the axis direction of the winding part.

2 . The coil device according to claim 1 , wherein the terminal block comprises an arm having a first hook part formed in a hook shape and protruding out towards the bobbin; and

the flange comprises a flange engaging part which extends in a direction approximately perpendicular to the arm and engages with the first hook part.

3 . The coil device according to claim 2 , wherein a second hook part having a hook shape is formed at a tip of the flange engaging part, and a lead part of the wire is pulled out towards the terminal block along a circumference of the arm while the first hook part is engaged with the flange engaging part.

4 . The coil device according to claim 1 , wherein a terminal block fixing part fixing the terminal block is formed at an end of the bobbin in an axis direction, in which

the terminal block fixing part comprises a raised part which protrudes out towards the terminal block, and

the terminal block comprises a recessed part which engages with the raised part.

5 . The coil device according to claim 1 , wherein the flange is formed along a circumference direction of the winding part, and

the flange has a notch where a lead part of the wire can pass through.

6 . The coil device according to claim 5 , wherein

the lead part comprises lead parts, and

one of the lead parts of the wire is pulled out through the notch towards the terminal block from an outer side of the flange, and

another one of the lead parts of the wire is pulled out towards the terminal block from an inner side of the flange without passing through the notch.

7 . The coil device according to claim 1 further comprising a cover provided around the terminal block; wherein

the wire comprises wires;

the terminal block is provided with a plurality of terminals connected with lead parts of the wires respectively;

the terminals are arranged in the axis direction of the winding part; and

the cover comprises,

a holding part to hold the terminal block,

a base part arranged under the terminals, and

a side part standing up from a side edge of the base part.

8 . The coil device according to claim 1 , wherein the axis direction of the winding part is approximately parallel to a mounting surface.

9 . The coil device according to claim 1 further comprising a case housing the bobbin, wherein

the case is capable of being filled with a potting resin, and

at least one through hole is formed on an outer circumference face of the winding part.

10 . A coil device comprising:

a bobbin including a winding part wound with a wire around an outer circumference face of the winding part, and a flange formed at an end of the winding part in an axis direction; and

a terminal block formed separately from the bobbin and installed to the bobbin; in which

the terminal block is installed to the bobbin at a position spaced away from the outer circumference face of the winding part in a direction perpendicular to the axis direction of the winding part,

wherein the terminal block comprises an arm having a first hook part formed in a hook shape at a tip of the arm and protruding out towards the bobbin; and

the flange comprises a flange engaging part which extends in a direction approximately perpendicular to the arm and engages with the first hook part.

11 . The coil device according to claim 10 , wherein a second hook part having a hook shape is formed at a tip of the flange engaging part, and a lead part of the wire is pulled out towards the terminal block along a circumference of the arm while the first hook part is engaged with the flange engaging part.

12 . The coil device according to claim 10 , wherein a terminal block fixing part fixing the terminal block is formed at an end of the bobbin in an axis direction, in which

the terminal block fixing part comprises a raised part which protrudes out towards the terminal block, and

the terminal block comprises a recessed part which engages with the raised part.

13 . The coil device according to claim 10 , wherein the flange is formed along a circumference direction of the winding part, and

the flange has a notch where a lead part of the wire can pass through.

14 . The coil device according to claim 10 further comprising a case housing the bobbin, wherein

the case is capable of being filled with a potting resin, and

at least one through hole is formed on an outer circumference face of the winding part.

15 . A coil device comprising:

a bobbin including a winding part wound with a wire around an outer circumference face of the winding part, and a flange formed at an end of the winding part in an axis direction; and

a terminal block formed separately from the bobbin and installed to the bobbin; in which

the terminal block is installed to the bobbin at a position spaced away from the outer circumference face of the winding part in a direction perpendicular to the axis direction of the winding part,

wherein a terminal block fixing part fixed with the terminal block is formed at an end of the bobbin in an axis direction, in which

the terminal block fixing part comprises a first step part,

the terminal block comprises a second step part, and

the first step part and the second step part engage with each other while a first step lower face of the first step part and a second step lower face of the second step part are in contact.

16 . The coil device according to claim 15 , wherein a terminal block fixing part fixing the terminal block is formed at an end of the bobbin in an axis direction, in which

the terminal block fixing part comprises a raised part which protrudes out towards the terminal block, and

the terminal block comprises a recessed part which engages with the raised part.

17 . The coil device according to claim 15 , wherein the flange is formed along a circumference direction of the winding part, and

the flange has a notch where a lead part of the wire can pass through.

18 . The coil device according to claim 15 further comprising a case housing the bobbin, wherein

the case is capable of being filled with a potting resin, and

at least one through hole is formed on an outer circumference face of the winding part.