A writing instrument has a gripping tube rotatably fitted on a front portion of a barrel. At the front portion of the barrel, plural identifying marks having different identification characteristics, such as color, are disposed in parallel in a circumferential direction of the barrel. A window portion is provided in the gripping tube through which is visible an identifying mark selected by rotating the gripping tube relative to the barrel. When the user rotates the gripping tube to the position where the chosen color is visible through the window portion, a locking pawl on the barrel engages with a locking groove at the rear end of the gripping tube to lock the gripping tube in this position. Once locked in position, the gripping tube cannot accidentally rotate thereby preventing a change of colors appearing at the window portion even if the writing instrument is subjected to shock or vibration.

A grip aid device for improving writing skills utilizes specific ergonomic and feedback mechanisms to promote an advantageous writing instrument grip and improve intrinsic hand musculature. The grip aid device includes strategically positioned pressure-based buttons, wherein each button interacts with a user's specific finger. The grip aid device features an incentive-based program that encourages the user to properly align their fingers to an approved grasp pattern, wherein simultaneously pressing the buttons causes the writing implement to emerge and become useable.

A grip aid device for improving writing skills utilizes specific ergonomic and feedback mechanisms to promote an advantageous writing instrument grip and improve intrinsic hand musculature. The grip aid device includes strategically positioned pressure-based buttons, wherein each button interacts with a user's specific finger. The grip aid device features an incentive-based program that encourages the user to properly align their fingers to an approved grasp pattern, wherein simultaneously pressing the buttons causes the writing implement to emerge and become useable.

The present invention relates to a retractable pen. A retractable pen comprises a first barrel, an ink cartridge, a second barrel, a clamping component and a spring; a main body of the ink cartridge, the spring and the clamping component are all located inside the first barrel and the second barrel, the spring is wound on a portion, close to the nib, of the ink cartridge, and the nib in a front portion of the ink cartridge can be extended and exposed out of the first barrel; an installation portion, muff-coupled to the first barrel, is arranged on the clamping component, and the clamping component is rotatable with respect to the first barrel; when the first barrel is muff-coupled to the second barrel, a polygonal neck is formed on a surface where an outer surface of the clamping component comes into contact with the second barrel.

Aspects determine optimal physical attribute values for defining a grip form factor on a microfluidic grip panel of a digital pen as a function of a correlation of the optimal physical attribute values to an intended use of the digital pen, wherein the optimal physical attribute values include a width dimension, a surface texture attribute, and shape pattern attribute that is defined as a function of the width dimension; and drive the microfluidic grip panel into a grip form corresponding to the determined optimal physical attribute values during use of the digital pen by a user.

A writing instrument system including an elongated tip having a firm, felt or plastic nib and a piercing tip. The elongated tip includes a curvature that resembles a shape of a dolphin and the nib is positioned at a first-end of the elongated tip for distributing ink to a surface in a controlled manner. The elongated tip is in fluid communication with the nib. The elongated tip also includes the piercing tip which is able to penetrate an ink cartridge or tube of a pen and be removably affixed to a pen. The piercing tip is in fluid communication with the elongated tip and allows ink to flow from a penetrated ink cartridge or tube through the elongated tip to the nib where it can be applied to a surface.

A tactual finger grip device and method provides increased tactual and visual sensory awareness of finger pressure and alignment especially for the left-handed user. The grip device provides a conically shaped sleeve of resilient material for inserting and adjustably securing a hand-held implement, such as a writing implement. A plurality of raised surface projections circumferentially positioned about the grip device outer surface provide tactual friction with a user's fingers, enabling user tactile sensory awareness, causing the user to adaptably minimize the tactual friction by conforming fingers and hand to natural placement, when the user grasps the sleeve secured to the hand-held implement. The device provides visual indicia for the forefinger, index finger, and thumb placement forming a natural hand position. Alternatively, the raised surface projections positioned about the inner surface create tactual friction or pressure between the device and a wearer's received finger when pressure is applied to a surface.

A tactual finger grip device and method provides increased tactual and visual sensory awareness of finger pressure and alignment especially for the left-handed user. The grip device provides a conically shaped sleeve of resilient material for inserting and adjustably securing a hand-held implement, such as a writing implement. A plurality of raised surface projections circumferentially positioned about the grip device outer surface provide tactual friction with a user's fingers, enabling user tactile sensory awareness, causing the user to adaptably minimize the tactual friction by conforming fingers and hand to natural placement, when the user grasps the sleeve secured to the hand-held implement. The device provides visual indicia for the forefinger, index finger, and thumb placement forming a natural hand position. Alternatively, the raised surface projections positioned about the inner surface create tactual friction or pressure between the device and a wearer's received finger when pressure is applied to a surface.

A writing utensil adapted for promoting the development of a tripod writing grip includes an elongate body having a substantially polygonal cross section, and having three faces extending between a proximal end and a distal end thereof, and a boss member extending from an intermediate portion of the elongate body, the boss member being adapted for impeding a user's fingers from sliding along a longitudinal axis of the elongate body.

A writing utensil adapted for promoting the development of a tripod writing grip includes an elongate body having a substantially polygonal cross section, and having three faces extending between a proximal end and a distal end thereof, and a boss member extending from an intermediate portion of the elongate body, the boss member being adapted for impeding a user's fingers from sliding along a longitudinal axis of the elongate body.