A writing instrument having an automatic sealing structure, in which a hinge part of a holder has projection jaws formed thereon having a role of a stopper that can prevent a hinge shaft from being excessively pivoted, thereby more effectively preventing ink from drying out due to complete sealing of the nib. The writing instrument having an automatic sealing structure, including: a body case having a front opening formed in one end thereof; a knock part coupled to the other end of the body case so as to make a nib protrude from or be retracted into the front opening of the body case by a pushing operation thereof; a cartridge inserted into the body case together with a spring in a state in which the knock part and the nib are coupled to both ends thereof, respectively; at least one O-ring fixedly fitted in the body case; a holder fixedly fitted in the body case so that one end thereof is covered by the O-ring; and a ball shutter pivotally coupled to the holder to allow the nib to protrude or be sealed according to the pivoting thereof, wherein the ball shutter includes hinge shafts formed in a fan shape, and hinge parts of the holder, in which the hinge shaft is pivotally positioned, have projection jaws formed thereon by protruding inwardly to limit a pivot range of the hinge shaft.

An assembly structure of a writing instrument, in which a sealing module assembly having a pre-assembled module for sealing is detachably attached to a body of the writing instrument, such that a production process may be smoothly performed due to an assembly process of the sealing parts with a difficulty in assembling being previously performed, and defective parts may be separately processed when defects occur in each part due to the separation structure of the body and the sealing module assembly, thereby reducing a defective rate. The assembly structure of a writing instrument, including: a body including a knock part installed therein to be operated by pushing, and a cartridge inserted into a hollow inside thereof; and a sealing module assembly which is detachably attached to a front end of the body, and has modules for sealing and operating installed inside thereof.

A decorative writing utensil (1) having an elongated cylindrical housing (2) containing an ink cartridge, in the case of a pen, or a retractable pencil lead, in the case of a mechanical pencil. The elongated cylindrical housing wrapped in one or more strips (11) of material extending upward to a top end (3) of the cylindrical housing. A pompom (13) is then created on the top end of the cylindrical housing in a manner that leaves a pushbutton (6) accessible through the pompom and still capable of functioning.

A multi-color writing marker may comprise a tubular marker barrel connected to a motor housing. The marker barrel may house a cartridge removably coupled to a drive shaft connected to a motor. The cartridge may include a plurality of reservoirs containing writing liquids of different colors. A marker tip may be mounted on a distal end of the cartridge. The marker tip supports a plurality of marker nibs corresponding to the number of cartridge reservoirs. Each marker nib may be in fluid communication with a corresponding reservoir. Actuation of the motor spins the cartridge and marker nibs while a user is simultaneous creating a design on the writing surface.

An ink writing instrument comprising a body extending along an axis and having a first end, the first end being provided with a writing tip and with an eraser, the eraser is movable along the axis with regard to the body, a helical-cam propelling mechanism being configured to move the eraser along the axis between a retracted position and a protruded position, the helical-cam propelling mechanism comprising a helical cam radially protruding from one of the eraser and the body, and two cam followers arranged on the other of the eraser and the body, the two cam followers axially sandwiching the helical cam at least when the eraser is moved between the retracted position and the protruded position.

An ink writing instrument comprising a body extending along an axis and having a first end, the first end being provided with a writing tip and with an eraser, the eraser is movable along the axis with regard to the body, a helical-cam propelling mechanism being configured to move the eraser along the axis between a retracted position and a protruded position, the helical-cam propelling mechanism comprising a helical cam radially protruding from one of the eraser and the body, and two cam followers arranged on the other of the eraser and the body, the two cam followers axially sandwiching the helical cam at least when the eraser is moved between the retracted position and the protruded position.

The invention relates to a retractable capacitance pen. The retractable capacitance pen comprises a pen case, an electrical signal transmitting module, an extension-and-retraction unit, and a switching unit. The extension-and-retraction unit can control the core of the electrical signal transmitting module to extend outside the pen case thereby the switching unit is activated to turn on the electrical signal transmitting module for continuously emitting electrical signals. Furthermore, the extension-and-retraction unit also can control the core of the electrical signal transmitting module to retract into the pen case thereby the switching unit is activated again to turn off the electrical signal transmitting module for stopping emitting electrical signals.

The present invention relates to an ergonomic capacitance pen. The ergonomic capacitance pen comprises an electrical signal transmitting module and a housing. The electrical signal transmitting module is deposited inside the housing. The electrical signal transmitting module comprises a core, a core holder, a spring, a sensor holder, a circuit board, and a battery holder. The battery holder is deposited on one surface of the circuit board and they are parallel with each other. When a battery is put into the battery holder, the battery and the circuit board are parallel with each other. Therefore, the gravity center of the ergonomic capacitance pen moves to the position near the head of the ergonomic capacitance pen, and the ergonomic capacitance pen can have a structure having best proportion of allocation for easily holding the ergonomic capacitance pen.

A writing device can be configured to provide ink or a colored dye upon a piece of paper or other medium. Such a writing device can include a plurality of selectable writing elements, wherein one of the writing elements comprises marker device comprising an ink reservoir connected to a writing tip.