Thin Transformer

• US 20040257189A1
• Filed: 06/16/2004
• Published: 12/23/2004
• Est. Priority Date: 06/19/2003
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chang, Gil-yong, Lee, Kyoung-geun
• Granted Patent: US 7,135,950 B2
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 2005/043 having multiple pin terminals, e.g. arranged in two parallel lines at both sides of the coil
• CPC Class Codes: H01F 2027/297 with pin-like terminal to be inserted in hole of printed path
• CPC Class Codes: H01F 27/325 Coil bobbins formers for coils in general H01F5/02
• CPC Class Codes: H01F 5/04 Arrangements of electric connections to coils, e.g. leads

Abstract

A thin transformer includes a hollow coil bobbin around which a coil is wound, an iron core provided to pass through a portion of the coil bobbin, and a terminal section having several terminals electrically connected to drawn-out lines of the coil and electrically and mechanically connected to a circuit board, the terminal section disposed adjacent to the coil bobbin below the iron core and provided at the terminal section such that a first portion of each terminal connected to a corresponding one of the drawn-out lines is exposed from a side surface of the terminal section other than a lower surface of the terminal section from which each terminal is exposed for connection to the circuit board. A plurality of grooves through which the drawn-out lines connected to the respective terminals can pass are formed on the terminal section. Accordingly, it is possible to decrease a total height of the transformer necessarily used for an electronic, thus accomplishing the decrease of a thickness and size of the electronic apparatus.

Claims

1. A thin transformer comprising:

a hollow coil bobbin around which a coil is wound, the coil having drawn-out lines;

an iron core provided to pass through a hollow portion of the coil bobbin; and

a terminal section including a plurality of terminals electrically connected to the drawn-out lines of the coil, the terminal section electrically and mechanically connected to a circuit board and disposed adjacent to the coil bobbin below the iron core,

wherein the terminals comprises a first portion connected to the drawn-out lines and exposed from a side surface of the terminal section other than a lower surface of the terminal section from which a second portion of the terminal is exposed to the circuit board, and the terminal section comprises grooves through which the drawn-out lines connected to the side surface of the respective terminals can pass.

2. The thin transformer according to claim 1, wherein the drawn-out lines are exposed from the side surface of the terminal section.

3. The thin transformer according to claim 1, wherein each terminal is formed of a bent shape having one end portion exposed from the lower surface of the terminal section and the other end portion exposed from the side surface of the terminal section.

4. The thin transformer according to claim 3, further comprising:

a protection cover that covers the first portion of the terminal connected to corresponding ones of the drawn-out lines and protects the side surface of the terminal section.

5. A thin transformer used with an electronics apparatus having a circuit board, comprising:

a coil bobbin around which a coil is wound, the coil having a plurality of drawn-out lines;

a core having a portion disposed around the coil and the coil bobbin, and having another portion disposed in a hollow portion of the coil bobbin to be inserted in the coil bobbin;

a terminal section disposed below the core and having a side surface and a lower surface; and

a plurality of terminals each having a first portion electrically connected to a corresponding one of the drawn-out lines of the coil and protruding from the side surface of the terminal section, a second portion protruding from the lower surface, and a middle portion connected between the first and second portions and disposed in the terminal section.

6. The thin transformer according to claim 5, wherein the lower surface of the terminal section faces a circuit board, and the side surface forms an angle with the lower surface.

7. The thin transformer according to claim 5, wherein the side surface of the terminal section faces outside in a direction having an angle with the lower surface of the terminal section.

8. The thin transformer according to claim 5, wherein the first portion of each terminal is substantially parallel to the lower surface of the terminal section, and the second portion of the each terminal is substantially parallel to the side surface.

9. The thin transformer according to claim 5, wherein the first portion of each terminal protrudes in a direction substantially perpendicular to the side surface, and the second portion of the each terminal protrudes in another direction substantially perpendicular to the lower surface of the terminal section.

10. The thin transformer according to claim 5, wherein the middle portion of each terminal is bent.

11. The thin transformer according to claim 5, wherein the middle portion of each terminal is buried in the terminal section.

12. The thin transformer according to claim 5, wherein the terminal section comprises a pair of sub-sections disposed on both sides of the core opposite to each other with respect to the core bobbin and each having the side surface and the lower surface, and the terminals are disposed on a corresponding one of the sub-sections.

13. The thin transformer according to claim 12, wherein the side surfaces of the sub-sections form are disposed to face outside in opposite directions, and the lower surfaces of the sub-sections are disposed to face in the same direction.

14. The thin transformer according to claim 5, wherein the terminal section has a cross-section of a rectangular shape having two sides opposite to the side surface and the lower surface, respectively.

15. The thin transformer according to claim 5, wherein the terminal section comprises a plurality of grooves formed on the side surface, and end portions of the drawn-out lines are disposed in corresponding ones of the grooves to be connected to corresponding ones of the terminals.

16. The thin transformer according to claim 5, wherein the terminal section comprises a hole to communicate with the side surface and the coil, and each of the drawn-out lines passes through the hole.

17. The thin transformer according to claim 5, wherein the electronics apparatus comprises a circuit board having a major surface, and the lower surface is disposed parallel to the major surface of the circuit board so that the thin transformer is disposed to be electrically and mechanically connected to the circuit board.

18. The thin transformer according to claim 16, wherein the side surface of the terminal section is perpendicular to the major surface of the circuit board.

19. An electronic apparatus comprising:

a circuit board; and

a transformer disposed to be electrically and mechanically coupled to the circuit board, the transformer comprising,

a coil bobbin around which a coil is wound, the coil having a plurality of drawn-out lines,

a core having a portion disposed around the coil and the coil bobbin, and having another portion disposed in a hollow portion of the coil bobbin to be inserted in the coil bobbin,

a terminal section disposed below the core and having a side surface and a lower surface facing the circuit board, and

a plurality of terminals each having a first portion electrically connected to a corresponding one of the drawn-out lines of the coil and protruding from the side surface of the terminal section, a second portion protruding from the lower surface, and a middle portion connected between the first and second portions and disposed in the terminal section.

20. The thin transformer according to claim 19, wherein the lower surface of the terminal section faces the circuit board, and the side surface forms an angle with the lower surface.

21. The thin transformer according to claim 19, wherein the lower surface is disposed parallel to a major surface of the circuit board, and the side surface of the terminal section is perpendicular to the major surface of the circuit board.