Low heavy pen
By incorporating a metal weight ring near the pen nib and a double-curvature grip, the problem of thumb fatigue caused by the pen's center of gravity distribution is solved, resulting in a comfortable grip and a smooth writing experience, making it suitable for children and beginners.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI PICASSO STATIONERY PRODS
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-17
AI Technical Summary
The current fountain pen's center of gravity is distributed in the middle and rear of the pen body, which requires a large torque to be applied when writing. Prolonged writing can easily cause fatigue in the thumb extensor muscles. In addition, the grip area is not designed to fit the natural curvature of the hand, which increases grip fatigue.
Design a low-weight fountain pen by significantly lowering the center of gravity by setting a metal counterweight ring near the nib, and by using a double-curvature grip and a micro-elastic silicone coating, combined with a transparent window on the barrel and a clip structure to optimize grip comfort and stability.
It effectively relieves fatigue of the thumb extensor muscles, improves writing fluency and comfort, adapts to the developmental characteristics of children's hands, and promotes the development of correct pen-holding posture.
Smart Images
Figure CN224130755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rehabilitation equipment technology, specifically a low-weight fountain pen. Background Technology
[0002] Most fountain pens on the market today are made of a single piece of plastic, with the center of gravity typically located in the middle to rear of the pen. This distribution of weight requires the hand to exert greater torque to control the nib during writing, which can easily lead to fatigue of the thumb extensor muscles during prolonged writing. This is especially detrimental to children whose hand muscles are still developing and to beginners in fountain pen writing, hindering them from mastering the correct writing posture. Furthermore, the grip area of traditional fountain pens is often designed with a single curvature, which does not conform to the natural arc of the hand, further exacerbating grip fatigue. Utility Model Content
[0003] The purpose of this invention is to provide a lightweight fountain pen to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-weight fountain pen, including a pen cap, a pen grip, and a pen barrel. One end of the pen grip is fixed with a gravity ring, and a pen tip is sleeved inside the gravity ring. One end of the pen tip, which is placed inside the pen grip, is fixed with an ink extractor, and the other end of the pen grip is threadedly connected to the pen barrel.
[0005] The gravity ring design significantly lowers the pen's center of gravity, effectively relieving fatigue in the thumb extensor muscles, making it especially suitable for long writing sessions.
[0006] Preferably, one end of the ink dispenser passes through the pen grip and is placed inside the pen barrel, and the surface of the pen barrel is provided with a transparent window. The ink dispenser is used to draw and store ink, and the transparent window is used to display the ink usage inside the ink dispenser.
[0007] Preferably, a pen clip is fixed to the surface of the pen cap, a top cap is provided at one end of the pen cap, and the other end of the pen cap covers one end of the pen grip.
[0008] Preferably, the gravity ring is a metal counterweight ring weighing 5-8g, and the distance between the gravity ring and the pen tip is 15-18cm. This can lower the center of gravity to within 3-5cm of the grip point. Theoretical calculations show that lowering the center of gravity can reduce the writing torque by 40-60%, effectively relieving fatigue of the thumb extensor muscles.
[0009] Preferably, the pen grip has a double curvature design, with the curvature radius of the pen grip near the pen tip being 18±2mm, corresponding to the thenar eminence muscle group, and the curvature radius of the pen grip away from the pen tip being 22±2mm, adapting to the finger bone spacing. The surface of the pen grip is covered with a micro-elastic silicone coating with a thickness of 0.8-1.2mm.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] By placing a metal weight ring near the nib, the pen's center of gravity is significantly lowered, effectively relieving fatigue in the thumb extensor muscles, making it especially suitable for prolonged writing. The double-curvature design conforms to the thenar eminence and finger bone spacing, while the micro-elastic silicone coating provides a comfortable grip, reduces hand friction, promotes correct pen-holding posture, and adapts to the developmental characteristics of children's hands. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a partial cross-sectional view of the present invention;
[0014] Figure 3 This is an overall cross-sectional view of the present invention;
[0015] Figure 4 This is a schematic diagram of the pen grip, gravity ring, and pen tip of this utility model.
[0016] In the picture: 1. Top cap; 2. Pen clip; 3. Pen cap; 4. Pen barrel; 5. Pen grip; 6. Gravity ring; 7. Pen tip; 8. Pen barrel transparent window; 9. Ink extractor. Detailed Implementation
[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0018] Please see Figure 1-4 This utility model provides a low-weight fountain pen, including a pen cap 3, a pen grip 5 and a pen barrel 4. One end of the pen grip 5 is fixed with a gravity ring 6, and a pen tip 4 is sleeved inside the gravity ring 6. One end of the pen tip 4, which is placed inside the pen grip 5, is fixed with an ink extractor 9. The other end of the pen grip 5 is threadedly connected to the pen barrel 4.
[0019] One end of the ink extractor 9 passes through the pen grip 5 and is placed inside the pen barrel 4. The surface of the pen barrel 4 is provided with a pen barrel transparent window 8.
[0020] Specifically, the ink dispenser 9 is used to draw and store ink, and the transparent window 8 on the pen barrel is used to display the ink usage inside the ink dispenser 9.
[0021] The pen cap 3 has a pen clip 2 fixed to its surface, one end of the pen cap 3 has a top cap 1, and the other end of the pen cap 3 covers one end of the pen grip 5.
[0022] The gravity ring 6 is a metal counterweight ring, weighing 5-8g, and the distance between the gravity ring 6 and the end of the pen tip 4 is 15-18cm.
[0023] Specifically, the placement of the gravity ring 6 brings the pen's center of gravity closer to the nib 7, thereby reducing the strain on the hand muscles and improving the smoothness and comfort of writing.
[0024] The pen grip 5 features a dual curvature design. The curvature radius of the pen grip 5 near the pen tip 7 is 18±2mm, and the curvature radius of the pen grip 5 away from the pen tip 7 is 22±2mm. The surface of the pen grip 5 is covered with a micro-elastic silicone coating with a thickness of 0.8-1.2mm.
[0025] Specifically, the dual-curvature design makes the pen grip 5 more ergonomic, better conforming to the fingers and reducing finger fatigue during prolonged writing. The micro-elastic silicone coating provides a good feel and anti-slip effect, allowing for a stable grip even with sweaty palms, ensuring writing stability.
[0026] In use, the pen can be secured in a pocket, notebook, or other suitable location via the pen clip 2 according to the user's writing habits, making it easy to access at any time. The cap 1 is not only aesthetically pleasing but also effectively protects the nib 7 from damage, while facilitating the opening and closing of the cap 3. When writing is needed, simply pull out the cap 3 to expose the grip 5 and nib 7 to begin writing. The transparent window 8 on the pen barrel allows the user to visually assess the ink level and replenish ink promptly, preventing writing interruptions. The weight and position of the gravity ring 6 are carefully calculated to ensure a stable center of gravity for the pen during writing, reducing unnecessary hand movement and improving writing accuracy and fluency. The combination of the double-curvature grip 5 and the micro-elastic silicone coating makes for a more comfortable hold, keeping the hand relaxed and reducing fatigue even during extended writing sessions.
[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A low-heavy fountain pen comprising a cap (3), a grip (5) and a barrel (4), characterized in that, One end of the pen grip (5) is fixed with a gravity ring (6). The pen grip (5) has a double curvature structure design. The curvature radius of the pen grip (5) near the pen tip (7) is 18±2mm, and the curvature radius of the pen grip (5) away from the pen tip (7) is 22±2mm. The pen tip (7) is sleeved inside the gravity ring (6). The pen tip (7) is fixed with an ink extractor (9) at one end inside the pen grip (5). The other end of the pen grip (5) is threaded with a pen barrel (4).
2. A low-ink steel pen according to claim 1, wherein: One end of the ink extractor (9) passes through the pen grip (5) and is placed inside the pen barrel (4), and the surface of the pen barrel (4) is provided with a pen barrel transparent window (8).
3. A low-ink steel pen according to claim 1, wherein: The pen cap (3) has a pen clip (2) fixed on its surface. One end of the pen cap (3) has a top cap (1), and the other end of the pen cap (3) covers one end of the pen grip (5).
4. A low-ink steel pen according to claim 1, wherein: The gravity ring (6) is a metal counterweight ring with a weight of 5-8g, and the distance between the gravity ring (6) and the end of the pen tip (7) is 15-18cm.
5. A low-ink steel pen according to claim 1, wherein: The surface of the pen grip (5) is covered with a micro-elastic silicone coating with a thickness of 0.8-1.2 mm.