Power supply structure of electromotive tool

• US 6,883,621 B1
• Filed: 01/05/2004
• Issued: 04/26/2005
• Est. Priority Date: 01/05/2004
• Status: Expired due to Fees

• Current Assignee: Jack Lin
• Original Assignee: Jack Lin
• Inventors: Lin, Jack
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US10/753,186
• Time in Patent Office: 477 Days
• Field of Search: 173/117, 173/2, 173/217, 173/171, 173/20, 310/47, 310/50, 318/254, 318/701, 318/439, 318/492, 363/80, 363/142, 363/285
• US Class Current: 173/217
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

A power supply structure of an electromotive tool comprises a body and a transformer. The body comprises a clamp at one end of the body; and an electromotive motor for driving the clamp to rotate; a control button installed at one lateral side of the body for controlling the electromotive motor; a battery seat being installed at another end of the body; the battery seat containing a battery and a control circuit; the control circuit having an inserting hole; an over current protection device of a charging circuit; and a switch; a transformer inserting into the inserting hole. By switching the switch of the control circuit to select an external power supply and a battery power supply. The control circuit serves for actuating the electromotive motor and charging the battery and the over current protection device serves to monitor the charging current so as to protect the battery.

Claims

1. A power supply structure of an electromotive tool comprising

a body comprising:

a clamp at one end of the body; and

an electromotive motor for driving the clamp to rotate;

a control button installed at one lateral side of the body for controlling the electromotive motor;

a battery seat being installed at another end of the body;

the battery seat containing

a battery;

a control circuit having an inserting hole;

a switch for selecting an external power supply and a battery power supply so as to perform at least one operation;

the operation being at least one of initiating a power supply to supply power to the electromotive tool and charging the battery;

an over current protection device of a charging circuit for monitoring the charging current to protect the battery from over-current; and

a transformer inserting into the inserting hole for supplying external power into the body;

wherein by switching the switch of the control circuit to select an external power supply and a battery power supply for supplying power to the body;

the control circuit serves to divide an external current for actuating the electromotive motor and charging the battery.

2. The power supply structure of an electromotive tool as claimed in claim 1, wherein the control circuit has an LED control loop, when the battery is charged, the LED control loop controls at least one LED to light up.

3. The power supply structure of an electromotive tool as claimed in claim 1, wherein a slide-preventing structure is installed at a connection of the transformer and the electromotive motor.

4. The power supply structure of an electromotive tool as claimed in claim 3, wherein the sliding-prevent structure has a hole and a connecting end of the transformer;

two lateral sides of the hole are formed with respective longitudinal buckling groove; and

an inner center of the buckling groove has a recess;

the connecting end of the transformer has a buckling plate;

a protrusion is formed at each of two long opposite sides of the connecting end;

when the buckling plate is embedded into the hole, the buckling plate is rotated through 90 degrees so that the buckling plate is buckled into the longitudinal buckling grooves and each protrusion is buckled in a respective recess.