Laser Straight Liner

• US 20090100691A1
• Filed: 10/17/2007
• Published: 04/23/2009
• Est. Priority Date: 10/17/2007
• Status: Active Grant

• Current Assignee: Jianhong Lu
• Original Assignee: Jianhong Lu
• Inventors: Lu, Jianhong
• Granted Patent: US 7,748,126 B2
• Time in Patent Office: Days
• US Class Current: 33/285
• CPC Class Codes: G01C 15/004 Reference lines, planes or sectors
• CPC Class Codes: Y10S 33/21 with laser

Abstract

The utility model relates to a kind of laser straight liner, including a foundation and a base, wherein said foundation is provided with batteries and said base is provided with at least one laser projection module. Said base and said foundation are connected in the way that is 360 degrees rotatable. One side of said foundation that faces said base is provided with the anode and cathode conduction rings that can connect batteries, and one side of said base that faces said foundation is provided with two contact pieces that can connect various laser projection modules and also can touch the anode and cathode conduction rings, thus realizing the conduction-wire-free connection between said laser projection modules and said batteries. This utility model makes said laser projection modules freely rotatable on said foundation, and thus the rotated angle during marking can be accurately controlled, ingenious and reasonable in design and convenient in operation. The lower-end transparent shell of cavity is provided with a cross scale, and the crossing point of said cross scale can be superposed with the intersection projection of the counter-extension lines of the laser beams emitted by various said laser projection modules, thus ensuring a accurate positioning.

Claims

1. A Laser Straight Liner, comprising:

A foundation (1) with batteries provided therein,

A base (2) with at least one laser projection module (3) mounted thereon, Wherein said base (2) and said foundation (1) are connected in the way that is 360 degrees rotatable, and one side of said foundation (1) that faces said base (2) is provided with the anode and cathode conduction rings (11) that can connect batteries, and one side of said base (2) that faces said foundation (1) is provided with two contact pieces (21) that can connect various said laser projection modules (3) and also can touch the anode and cathode conduction rings (11), thus realizing the conduction-wire-free connection between said laser projection modules (3) and said batteries.

2. The Laser Straight Liner of claim 1, further including a columnar cavity in the middle of both said foundation (1) and said base (2), wherein the upper-end shell (22) of said base (2)'"'"'s cavity and the lower-end shell (12) of said foundation (1)'"'"'s cavity are both made of transparent materials.

3. The Laser Straight Liner of claim 1, further including two to five laser projection modules (3) provided on said base (2).

4. The Laser Straight Liner of claim 3, further including a cross scale (13) marked on said lower-end shell (12) of said foundation (1)'"'"'s cavity, wherein the crossing point of said cross scale (13) can be superposed with the intersection projection of the counter-extension line of the laser beams emitted by various said laser projection modules (3).

5. The Laser Straight Liner of one of claim 1 to 4, further including a scale (14) marked on the outer surface of said foundation (1).