Minidrive pen with laser and illuminating function

A minidrive pen with laser and illuminating function, comprising:

• an upper pen barrel, wherein a minidrive circuit board is disposed, and the minidrive circuit board connects to a USB (Universal Serial Bus) connector, which protrudes from a bottom extremity of the upper pen barrel, moreover, screw teeth are configured on an outer edge of the bottom extremity of the upper pen barrel;
• a lower pen barrel, wherein two orifices are defined in a bottom extremity of same, moreover, a screw thread is configured on an inner edge of a top extremity of the lower pen barrel, and a circuit board and a battery compartment are further configured within the lower pen barrel;
• the circuit board, upon which is configured a laser element and an illuminating element, and one side of the circuit board connects to an inner edge of the lower pen barrel, moreover, one extremity of a spring is connected to a top edge of the circuit board, and the spring is so configured to penetrate an opening in the battery compartment;
• an adapter, which assumes a hollow state, and diameter of a bottom end of the adapter is configured to be relatively smaller than that of a top end, a screw thread and screw teeth are configured on an inner edge of the top end and an outer edge of the bottom end of the adapter respectively;
• regarding assemblage of the aforementioned structural members, wherewith, after batteries have been disposed within the battery compartment, thereupon the bottom end of the adapter is screwed tight onto the top end of the lower pen barrel, whereafter the upper pen barrel is screwed tight onto the top end of the adapter, thereby assembling a minidrive pen thereof, and which benefits portability thereof, moreover, the laser element and the illuminating element can be switched on by means of switches, thus realizing functionality of a laser pointer and illumination.