Safety Unit Integrated on a Printed Circuit Board and the Printed Circuit Board

• US 20120044036A1
• Filed: 08/09/2011
• Published: 02/23/2012
• Est. Priority Date: 08/19/2010
• Status: Abandoned Application

• Current Assignee: Emb-Papst Mulfingen GmbH & Co. KG
• Original Assignee: Ebm-papst Ventilator (Shanghai) Co., Ltd.
• Inventors: Shang, Wei
• Application Number:
  US13/205,777
• Publication Number:
  US 20120044036A1
• Time in Patent Office: Days
• US Class Current: 337/186
• CPC Class Codes: H01H 69/022 of printed circuit fuses
• CPC Class Codes: H01H 85/046 Fuses formed as printed circuits
• CPC Class Codes: H05K 1/0293 Individual printed conductors which are adapted for modification, e.g. fusable or breakable conductors, printed switches
• CPC Class Codes: H05K 2201/10204 Dummy component, dummy PCB or template, e.g. for monitoring, controlling of processes, comparing, scanning
• CPC Class Codes: H05K 2201/10636 Leadless chip, e.g. chip capacitor or resistor
• CPC Class Codes: H05K 3/28 Applying non-metallic protective coatings H05K3/0091 takes precedence; methods for intermediate insulating layers for build-up multilayer circuits H05K3/4673
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a safety unit integrated on a PCB (printed circuit board) and the PCB, and pertains to the technical field of circuit protecting device. The safety unit comprises: first electrode terminals; copper wire connected to the first electrode terminals at both ends respectively; an insulating paint film covering the copper wire; a chip fixed resistor disposed on the insulating paint film; and second electrode terminals connected to both ends of the chip fixed resistor respectively; wherein the first electrode terminals, the second electrode terminals and the copper wire are firmly pressed to be fixed onto the substrate of the printed circuit board. The safety unit provided by the invention possesses such characteristics as being simple in structure, low in cost and small in volume.

Claims

1. A safety unit integrated on a printed circuit board, characterized in that, the safety unit comprises:

first electrode terminals;

copper wire connected to the first electrode terminals at both ends respectively;

an insulating paint film covering the copper wire;

a chip fixed resistor disposed on the insulating paint film; and

second electrode terminals connected to both ends of the chip fixed resistor respectively;

wherein the first electrode terminals, the second electrode terminals and the copper wire are firmly pressed to be fixed onto the substrate of the printed circuit board.

2. A safety unit according to claim 1, characterized in that, the edge of contacting portion between the first electrode terminals and the copper wire is connected with the side edge of the copper wire in a gradual varying manner in shape.

3. A safety unit according to claim 2, characterized in that, the edge of contacting portion between the first electrode terminals and the copper wire is arranged to be gradual varying linear structure.

4. A safety unit according to claim 2, characterized in that, the edge of contacting portion between the first electrode terminals and the copper wire is arranged to be gradual varying arc structure.

5. A safety unit according to any one of claims 1 to 4, characterized in that, the first electrode terminals, the second electrode terminals, the copper wire and the circuit on the printed circuit board are formed by patterning the same layer of copper metal film covering the substrate.

6. A safety unit according to any one of claims 1 to 4, characterized in that, the insulating paint film and the insulating paint film covering the circuit of the printed circuit board are formed by patterning the same layer of insulating paint film.

7. A safety unit according to claim 6, characterized in that, the insulating paint film is square in shape, and the side length of the square is the same as the length of the copper wire.

8. A safety unit according to any one of claims 1 to 4, characterized in that, the copper wire perpendicularly joints the chip fixed resistor.

9. A safety unit according to claim 4, characterized in that, the side edge of the copper wire and the arc are connected tangent to each other.

10. A printed circuit board, characterized by comprising a safety unit according to any one of claim 1.