Power supply unit for electronic devices

• US 20040097115A1
• Filed: 11/04/2003
• Published: 05/20/2004
• Est. Priority Date: 11/05/2002
• Status: Active Grant

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Tanaka, Toshihiro, Myochin, Katsumi
• Granted Patent: US 6,869,299 B2
• Time in Patent Office: Days
• US Class Current: 439/188
• CPC Class Codes: H01R 13/05 Resilient pins or blades carrying separate resilient parts H01R13/15
• CPC Class Codes: H01R 13/24 resilient; resiliently-mounted
• CPC Class Codes: H01R 13/26 Pin or blade contacts for sliding co-operation on one side only for modular jack type connectors H01R24/62

Abstract

A power supply unit for electronic devices has an insulating battery pack holder with a hollow portion to accommodate a battery pack detachably; a plurality of connector contacts and a switch contact formed of conductive metal and disposed inside the battery pack holder, part of each connector contact protruding toward the hollow portion, the switch contact capable of detaching from or attaching to a predetermined one of the connector contacts with a moving contact portion. When the battery pack is accommodated in the hollow portion, its electrode terminals elastically touch corresponding connector contacts to be conductively connected to a driver circuit. In removal of the battery pack from the hollow portion, when the predetermined connector contact protrudes into the hollow portion by a predetermined distance according to a reduction in urging force of the electrode terminal, the predetermined connector contact touches the switch contact to output a detection signal.

Claims

1. A power supply unit that accommodates a battery pack with a plurality of electrode terminals and supplies power to a driver circuit of an electronic device, the power supply unit comprising:

an insulating battery pack holder with a hollow portion to accommodate the battery pack detachably;

a plurality of connector contacts formed of conductive metal and disposed inside the battery pack holder, part of each connector contact protruding toward the hollow portion; and

a switch contact formed of conductive metal and disposed inside the battery pack holder, the switch contact capable of detaching from or attaching to a predetermined one of the connector contacts;

wherein when the battery pack is accommodated in the hollow portion, the plurality of electrode terminals elastically come into contact with corresponding connector contacts to be conductively connected to the driver circuit, and the predetermined connector contact is elastically deformed by the corresponding electrode terminal to separate from the switch contact; and

wherein when the predetermined connector contact protrudes into the hollow portion by a predetermined distance according to a reduction in urging force of the electrode terminal, the predetermined connector contact comes into contact with the switch contact to output a detection signal.

2. A power supply unit according to claim 1, wherein the predetermined connector contact keeps contact with the corresponding electrode terminal when the predetermined connector contact comes into contact with the switch contact, and power supply from the backup power source to the driver circuit starts according to the detection signal.

3. A power supply unit according to claim 1, further comprising a connector that functions as a detector switch configured by accommodating the predetermined connector contact and the switch contact in an insulating housing with an opening and making part of the predetermined connector contact retractably protrude out of the housing through the opening, and then built into the battery pack holder.

4. A power supply unit according to claim 2, further comprising a connector that functions as a detector switch configured by accommodating the predetermined connector contact and the switch contact in an insulating housing with an opening and making part of the predetermined-connector contact retractably protrude out of the housing through the opening, and then built into the battery pack holder.

5. A power supply unit according to claim 3, wherein the switch contact and the plurality of connector contacts are disposed side by side in the housing.

6. A power supply unit according to claim 4, wherein the switch contact and the plurality of connector contacts are disposed side by side in the housing.