Patent ID: 7967463

Claim:
A pen having a decoration comprising a penholder, an interior of which is provided with a through-hole; a refill, which is inserted into the through-hole of the penholder and an end of which is provided with a nib; a socket, an inner rim of which is provided with a holding chamber, with corner edges in the holding chamber being provided respectively with a stop strip, and side edges of the two stop strips being provided respectively with a slope-shape ring; a decoration, which is latched on the socket, and a lower end of which is provided with two lock slots; and an illuminator, which is emplaced in the decoration and includes a lift plate, which is emplaced in the socket and two wings of which are emplaced in the holding chamber of the socket and provide for locking the two lock slots of the decoration, a spring, a bottom of which is extended with a contact and which is provided on the lift plate; a battery holder, which is sheathed on the spring and an interior of which is emplaced with two batteries; and a lamp holder, an interior of which is connected with an LED, with a bottom pin of the LED touching the batteries and a side pin of the LED touching the spring; when the decoration rotates, two wings of the lift plate being driven to move upward along the slope-shape rings in the socket to compress a bottom end of the spring that the contact touches the batteries, allowing the LED to illuminate; when writing with the pen, the nib driving the refill to move upward to push the lift plate to compress the bottom end of the spring that the contact touches the batteries, allowing the LED to illuminate.