TOOL HANDLE FOR AN EXCHANGEABLE SCREWDRIVER

• US 20100095812A1
• Filed: 10/22/2008
• Published: 04/22/2010
• Est. Priority Date: 10/22/2008
• Status: Active Grant

• Current Assignee: Jin-Tsai Lai
• Original Assignee: Jin-Tsai Lai
• Inventors: Lai, Jin-Tsai
• Granted Patent: US 7,717,016 B2
• Time in Patent Office: Days
• US Class Current: 81/438
• CPC Class Codes: B25B 23/0042 Connection means between screwdriver handle and screwdriver shaft

Abstract

A tool handle for an exchangeable screwdriver includes a handle, a retaining unit and a control unit. The retaining unit is mounted in one end of the handle. The retaining unit has a retaining hole defined therein and extending therethrough. The retaining unit has a recess defined in a lateral thereof and communicated with the retaining hole. The retaining unit has at least one connecting portion disposed between the recess and the retaining hole. The control unit is received in the recess. The control unit has at least one resilient arm extending therefrom. The at least one resilient arm passes the recess and is abutted against the at least one connecting portion to selectively extend to the retaining hole.

Claims

1. A tool handle for an exchangeable screwdriver comprising:

a handle having a mounting potion formed in one end thereof, the mounting portion having at least one aperture defined in an outer peripheral thereof;

a retaining unit mounted in the mounting portion;

the retaining unit having at least one hook extending from an outer peripheral thereof, the at least one hook engaged with the at least one aperture in the mounting portion to prevent the retaining unit from rotation and axial movement, the retaining unit having a retaining hole defined therein and extending therethrough, the retaining unit having a recess defined in a lateral thereof and communicated with the retaining hole;

the retaining unit having two connecting portion disposed between the recess and the retaining hole;

a sleeve disposed on the peripheral of the mounting portion to avoid disengaging the at least one hook; and

a control unit received in the recess;

the control unit having two resilient arms curvilinearly extending therefrom to form a semicircle, the two resilient arms passing the recess and respectively abutted against the two connecting portion to selectively extend to the retaining hole, each resilient arm having an extending catch extending from a free end thereof for selectively extend to the retaining hole.

2. The tool handle for an exchangeable screwdriver as claimed in claim 1, wherein the mounting portion has at least one rib extending from an inner peripheral thereof and the retaining unit has at least one slot defined in the outer peripheral thereof, the at least one rib engaged with the at least one slot to prevent the retaining unit from rotating relative to the handle..

4. The tool handle for an exchangeable screwdriver as claimed in claim 1, wherein the retaining hole has a noncircular section.

5. The tool handle for an exchangeable screwdriver as claimed in claim 1, wherein the retaining hole is in a shape of hexagon.

3. (canceled)

6. (canceled)

7. (canceled)