Connector and method for manufacturing same

• US 6,679,709 B2
• Filed: 02/01/2002
• Issued: 01/20/2004
• Est. Priority Date: 07/13/2001
• Status: Expired due to Fees

• Current Assignee: Moldec Co., Ltd.
• Original Assignee: Moldec Co., Ltd.
• Inventors: Takeuchi, Shinobu
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): Hammond, Briggitte R.
• Application Number:
  US10/060,296
• Publication Number:
  US 20030013330A1
• Time in Patent Office: 718 Days
• Field of Search: 439/83, 439/876, 439/824, 439/736, 439/856, 439/857, 439/342, 439/884
• US Class Current: 439/83
• CPC Class Codes: H01R 12/57 surface mounting terminals
• CPC Class Codes: H01R 12/716 Coupling device provided on the PCB
• CPC Class Codes: H05K 3/3426 characterised by the leads
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a connector which is easily manufactured and connects a circuit board in good condition. The connector according to the invention is a CPU socket to be surface-mounted on a circuit board 2, comprising a terminal 5 attached inside an internal case 4a made of an insulating material and a solder 6 fixed to the terminal 5. A connecting section 11 of the terminal 5 is provided with a pair of bar-like pieces 12, and has first claw sections 13 and a second claw section 14. In order to fix the solder 6 to the connecting section 11, tip ends of the first claw sections 13 are caulked by bending so that the tip ends contact with each other. The connecting section 11 is provided with an internal passage 15 connecting the upper and lower sides thereof. The solder 6 does not come off the terminal 5 because the solder 6 is attached to the internal case 4a after fixed to the connecting section 11 of the terminal 5 by caulking. In addition, it is easy to improve coplanarity of the tip end of each solder 6 because a length of the solder 6 protruding from the connecting section 11 is adjustable by changing the caulking position of the solder 6.

Claims

1. A connector to be surface-mounted on a circuit board having an electrical circuit and used to attachably connect an integrated circuit or another connector provided with a plurality of pins extending downward to the circuit board comprising:

a case made of an insulating material;

a through-hole penetrating said case vertically and into which said pin is inserted;

a terminal having a contact section provided in said through-hole to be in contact with said pin, a connecting section facing said electrical circuit and a body section joining said contact section and said connecting section; and

a thermally fusible conductive material existing between said connecting section and said electrical circuit;

wherein said connecting section extends substantially in parallel with said circuit board and is provided with an internal passage connecting upper and lower sides of said connecting section, and said thermally fusible conductive material is attached to said connecting section in a manner of extending both upward and downward through said internal passage in a state in which said thermally fusible conductive material is not heated and has not been fused to said circuit board, and wherein a longitudinal axis of the thermally fusible conductive material is substantially perpendicular to a plane of said circuit board.

2. A connector according to claim 1, wherein said thermally fusible conductive material is freely movable between the upper and lower sides of said connecting section through said internal passage when said thermally fusible conductive material is heated and melted,

when said connector is surface-mounted on said circuit board, said thermally fusible conductive material is heated and melted in the condition said thermally fusible conductive material is in contact with said electrical circuit, and when a space formed between said connecting section and said electrical circuit is filled with the heated and melted thermally fusible conductive material, an excessive thermally fusible conductive material contained between said connecting section and said electrical circuit moves to the upper side of said connecting section through said internal passage.

3. A connector according to claim 1, wherein said thermally fusible conductive material is freely movable between the upper and lower sides of said connecting section through said internal passage when said thermally fusible conductive material is heated and melted, such that when said connector is surface-mounted on said circuit board, said thermally fusible conductive material is heated and melted in a condition in which said thermally fusible conductive material is in contact with said electrical circuit, and the thermally fusible conductive material existing on the upper side of said connecting section moves to the lower side of said connecting section through said internal passage.

4. A connector according to any one of claims 1 through 3, wherein said connecting section comprises a pair of bars extending and branching substantially in parallel with said circuit board, and said internal passage is formed by allowing tip ends of said pair of bars to be close to or in contact with each other.

5. A connector according to any one of claims 1 through 3, wherein said connecting section comprises a plate substantially in parallel with said circuit board, and said internal passage comprises a through-hole connecting the upper and lower sides of said connecting section.

6. A connector according to any one of claims 1 through 3, wherein a surface of the body section close to said connecting section is provided with a groove or a step.

7. A connector according to any one of claims 1 through 3, wherein the surface of the body section close to said connecting section is coated with a substance having low wettability of solder.

8. A connector according to claim 1, wherein said connecting section comprises a pair of bars extending and branching substantially in parallel with said circuit board, and said thermally fusible conductive material is held between said pair of bars by caulking.

9. A connector according to claim 8, wherein said pair of bars comprises a pair of first claw sections protruding inward from both sides of the bars at tip ends of said bars and a second claw section protruding toward the tip ends of said pair of bars at a root section of the bars, and when said thermally fusible conductive material is fixed to said pair of bars by caulking, said first claw sections and said second claw section penetrate into said thermally fusible conductive materials.

10. A connector according to claim 8 or 9, wherein said pair of bars at said connecting section are formed into an annular shape by allowing tip ends thereof to be in contact with each other.

11. A connector according to claim 8 or 9, wherein said pair of bars at said connecting section are formed by allowing tip ends thereof to have a specified clearance.

19. A connector according to claim 1, wherein said thermally fusible conductive material is provided with a projection having a wall thickness reducing toward said circuit board side.

20. A connector according to claim 19, wherein said projection is formed into a conical shape having a diameter reducing toward said circuit board.

21. A connector according to claim 19, wherein said projection is formed into a cross shape toward said circuit board.

22. A connector according to claim 19, wherein said projection is formed into a cylinder toward said circuit board, and internally provided with a depression having a diameter enlarging toward said circuit board side.

23. A connector according to claim 1, 8, 12, 17, or 19, wherein said thermally fusible conductive material is a solder formed into a cylindrical body extending vertically which is filled with flux.

24. A connector according to claim 1, 8, 12, 17, or 18, wherein said thermally fusible conductive material is a cylindrical solder having a central hole penetrating vertically, and attached to said connecting section to connect between the upper and lower sides of said connecting section by said central hole.

12. A connector to be surface-mounted on a circuit board having an electrical circuit and used to attachably connect an integrated circuit or another circuit provided with a plurality of pins extending downward to the circuit board comprising:

a case made of an insulating material;

a through-hole penetrating said case vertically and into which said pin is inserted;

a terminal having a contact section provided in said through-hole to be in contact with said pin and a connecting section facing said electrical circuit; and

a thermally fusible conductive material existing between said connecting section and said electrical circuit;

wherein said connecting section is formed to be a plate substantially in parallel with said circuit board and is provided with an internal passage penetrating from one side to the other of said plate, and said thermally fusible conductive material is inserted through said internal passage and fixed, and said thermally fusible conductive material is attached to said connecting section in a manner of extending both upward and downward through said internal passage in a state in which said thermally fusible conductive material is not heated and has not been fused to said circuit board, and wherein a longitudinal axis of the thermally fusible conductive material is substantially perpendicular to a plane of said circuit board.

13. A connector according to claim 12, wherein said internal passage comprises a round hole, and said thermally fusible conductive material is fixed by caulking by crushing said round hole at a side of said connecting section from one side to deform said hole.

14. A connector according to claim 12, wherein said internal passage comprises a round hole, and said thermally fusible conductive material is fixed by caulking by crushing said round hole at the sides of said connecting section from at least three sides to deform it into a nearly rectangular shape hole as viewed horizontally.

15. A connector according to claim 12, wherein said internal passage comprises a connecting hole, and said thermally fusible conductive material is fixed by caulking by externally pressing and bending said connecting section in a diagonal direction to reduce an opening area of said connecting hole.

16. A connector according to claim 12, wherein said internal passage comprises a connecting hole, and thermally fusible conductive material is fixed to said connecting section by caulking by deforming to make a width larger than that of said connecting hole at the upper and lower sides of said connecting section in a condition said thermally fusible conductive material is inserted into said connecting hole.

17. A connector according to claim 12, wherein said internal passage comprises a connecting hole, and said thermally fusible conductive material is fixed by being press fitted in said connecting hole.

18. A connector according to claim 12, wherein said internal passage comprises a recess cut in from tip ends of said connecting section, and said thermally fusible conductive material is fixed by being press fitted in said recess.

25. A connector to be surface-mounted on a circuit board having an electrical circuit and used to attachably connect an integrated circuit or another connector provided with a plurality of pins extending downward to the circuit board comprising:

a case made of an insulating material;

a through-hole penetrating said case vertically and into which said pin is inserted;

a terminal having a contact section provided in said through-hole to be in contact with said pin and a connecting section facing said electrical circuit; and

a thermally fusible conductive material existing between said connecting section and said electrical circuit;

wherein said connecting section comprises a pair of bars extending and branching substantially in parallel with said circuit board, and said thermally fusible conductive material is held between said pair of bars by caulking, and said pair of bars at said connecting section are formed into an annular shape by allowing tip ends of the bars to be in contact with each other, and

wherein said pair of bars comprises a pair of first claw sections protruding inward from both sides at tip ends and a second claw section protruding toward the tip ends of said pair of bars at a root section, and when said thermally fusible conductive material is fixed to said pair of bars by caulking, said first claw section and said second claw section penetrate into said thermally fusible conductive material.