Pointer Structure

Structure of laser pointer

A laser pointer is disclosed including a laser module fitted into a conductive cylindrical casing and attached with a laser firing lens assembly and connected to a battery set and controlled by a switch to fire a laser beam for pointing, the laser module including a focus adjusting element threaded into the inner thread on the cylindrical shell thereof, whereby rotating the focus adjusting element on the cylindrical shell in either direction causes change of distance between the lens of the laser firing lens assembly and the laser diode of the laser module so that the focus is adjusted. The switch has a switching control press rod for switch control, and for fastening to the pocket as the laser pointer is not in use.

1. A laser pointer comprising a laser module fitted into a cylindrical casing and attached with a laser firing lens assembly and connected to a battery set and controlled by a switch to fire a laser beam for pointing, wherein said laser firing lens assembly is made in the shape of a hollow, truncated cone having a laser firing hole on a front end thereof, and a lens supported on an O-ring inside a stepped inside wall thereof; said laser module comprises a cylindrical shell inserted in said cylindrical casing to hold a focus control element, a laser diode, a rubber cushion, a printed circuit board, and a spring, said focus control element comprising a hollow screw rod threaded into an inner thread on said cylindrical shell and a small hole on the hollow screw rod for passing the laser beam, said rubber cushion being disposed between said laser diode and said printed circuit board, said laser diode being electrically connected to said printed circuit board; said cylindrical casing is made from a conductive material to hold said battery set, having a smooth front end, into which said laser module fits, and a rear end with an inner thread; said switch comprises an insulative stepped socket and a cap, said insulative stepped socket having an outer thread threaded into the inner thread on the rear end of said cylindrical casing, a stepped axle hole through the longitudinal center terminated to a small taper orifice, said cap being made from a conductive material having a plug rod fitted into the stepped axle hole on said insulative stepped socket and a clip-like press rod for switching control, said clip-like press rod having a raised contact reversibly pressed to contact said cylindrical casing in electrically connecting the said battery set to said laser diode; and said battery set has the positive pole inserted in the taper orifice and electrically connected to said cap, and the negative pole connected to said spring.

2. The laser pointer of claim 1 wherein rotating said focus control element on the cylindrical shell of said laser module in either direction causes change of distance between said lens and said laser diode so that the focus is adjusted.

3. The laser pointer of claim 1 wherein said stepped socket and said cap of said switch are separately made, and said clip-like press rod and said plug rod of said cap are integrally shape formed.

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