CN103144463A - Detachable gel pen nib - Google Patents

Abstract

A detachable nib of a gel pen relates to the field of stationery. Due to various reasons, it often occurs that the ball is not flexible enough to roll, causing the ink to be unable to be brought out and writing to be impossible. In order to promote easier maintenance and longer use of gel pens or ballpoint pens, the present invention designs a detachable gel pen nib. The technical solution is: the top of the ink conduit is connected to the ink storage tube of the gel pen, and the bottom of the ink conduit has a spherical depression; there is a protrusion near the top of the ink conduit, and the protrusion has external threads; the sleeve has internal threads, The sleeve is connected to the protrusion by thread, there is a platform at the lower part of the sleeve thread, and there is a sealing gasket between the platform and the protrusion. There is a through hole in the center of the sleeve. The size of the through hole matches the outer diameter of the ink conduit. The sleeve The front end is a spherical surface, and a circular hole is arranged at the front end of the spherical surface. The beneficial effect is: the ball can be wiped; the ink conduit can be dredged; the distance between the front end of the sleeve and the bottom of the ink conduit can be increased.

Description

A detachable nib of a gel pen

technical field

The invention relates to the field of stationery, in particular to nibs of gel pens and ballpoint pens.

Background technique

The nib of a gel pen or a ballpoint pen is mainly a ball. After the solidification of the internal ink, the aggregation of dust, and the collision deformation, the rolling of the ball will be inconvenient, or even unable to roll, resulting in the inability to bring out the ink and making writing impossible. Carry out, cause this pen to be scrapped, and remaining ink also just wasted.

Contents of the invention

In order to promote easier maintenance and longer use of gel pens or ballpoint pens, the present invention designs a detachable gel pen nib.

The technical solution adopted by the present invention to realize the object of the invention is: a detachable gel pen nib, characterized in that: the detachable gel pen nib is composed of ink conduit, ball and sleeve; the bottom of the ink conduit has a spherical Recess, the top of the ink conduit is connected to the ink storage tube of the gel pen; there is a protrusion near the top of the ink conduit, and the protrusion has external threads; the sleeve has internal threads, and the sleeve is threaded to the protrusion, and the sleeve There is a platform at the lower part of the barrel thread, and there is a sealing gasket between the platform and the protrusion. There is a through hole in the center of the sleeve. The size of the through hole matches the outer diameter of the ink conduit, and the diameter of the through hole is equal to the outer diameter of the ink conduit, or Slightly larger by 0.05-0.1mm, the front end of the sleeve is a spherical surface, and there is a round hole at the front end of the spherical surface, the size of the round hole matches the size of the ball.

The radius of curvature of the spherical depression at the bottom of the ink conduit is 0.05-0.1mm larger than that of the ball.

There is a protrusion 3-5 mm away from the top of the ink conduit, the protrusion is 0.5-1 mm higher than the surface of the ink conduit, and the thread depth of the external thread of the protrusion is 0.5 mm.

The thickness of the gasket between the platform at the lower part of the sleeve thread and the protrusion is 1mm.

The radius of curvature of the spherical surface at the front end of the sleeve is slightly larger than that of the ball by 0.05-0.1mm.

The diameter of the circular hole on the spherical surface at the front end of the sleeve is 0.6-0.8 times the diameter of the ball.

The beneficial effects of the present invention are: compared with the fixed nib, the advantages of the present invention are as follows: (1) the nib of the present invention can be disassembled, and after disassembly, the ball can be wiped to reduce the adhered sundries; (2) Sewing needles can be used to guide the ink conduit; (3) When the pen falls to the ground and the sleeve is deformed, you can loosen it slightly to increase the distance between the front end of the sleeve and the bottom of the ink conduit and increase the ball’s movement space, in order to facilitate the dredging of ink. the

Description of drawings

Fig. 1 is a schematic diagram of a detachable nib of a gel pen.

Fig. 2 is a schematic diagram of the nib sleeve.

Wherein, 1. ink conduit, 2. protrusion, 3. spherical depression, 4. sleeve, 5. ball.

Detailed ways

A detachable gel pen tip is composed of an ink conduit 1, a ball 5 and a sleeve 4. The bottom of the ink conduit 1 has a spherical depression 3, and the radius of curvature of the spherical depression 3 is 0.05- 0.1mm, the top of the ink conduit 1 is connected to the ink storage tube of the gel pen, and there is a protrusion 2 at a distance of 3-5mm from the top of the ink conduit 1, and the protrusion 2 is 0.5-1mm higher than the surface of the ink conduit 1, protruding Part 2 has an external thread, the thread depth is 0.5mm, the sleeve 4 has an internal thread, the sleeve 4 is connected to the protrusion 2 through the thread, and there is a platform at the bottom of the thread of the sleeve 4, and a sealing gasket can be arranged between the platform and the protrusion , the thickness of the gasket is 1mm, there is a through hole in the center of the sleeve, the size of the through hole matches the outer diameter of the ink conduit 1, the front end of the sleeve is a spherical surface, the radius of curvature of the spherical surface is slightly larger than the radius of curvature of the ball by 0.05-0.1mm, There is a circular hole at the front end of the sleeve, the size of the circular hole matches the size of the ball, and the diameter of the circular hole is 0.6-0.8 times the diameter of the ball.

Claims (6)

1. A detachable gel pen tip, characterized in that: the detachable gel pen tip is composed of an ink conduit (1), a ball (5) and a sleeve (4); the bottom of the ink conduit (1) There is a spherical depression (3), the top of the ink conduit (1) connects to the ink storage tube of the gel pen; near the top of the ink conduit (1) there is a protrusion (2), the protrusion (2) has external threads ;The sleeve (4) has an internal thread, and the sleeve (4) is connected to the protrusion (2) through threads, and there is a platform at the lower part of the thread of the sleeve (4), and there is a sealing gasket between the platform and the protrusion, and the sleeve There is a through hole in the center, the size of the through hole matches the outer diameter of the ink conduit (1), the front end of the sleeve is a spherical surface, and there is a circular hole at the front end of the spherical surface, the size of the circular hole matches the size of the ball. 2. A detachable gel pen tip according to claim 1, characterized in that: the radius of curvature of the spherical depression (3) at the top of the ink conduit (1) is 0.05- 0.1mm. 3. A detachable gel pen tip according to claim 1, characterized in that: there is a protrusion (2) at a position 3-5 mm from the top of the ink conduit (1), and the height of the protrusion (2) is The surface of the ink conduit (1) is 0.5-1mm, and the thread depth of the external thread of the protrusion (2) is 0.5mm. 4. A detachable gel pen nib according to claim 1, characterized in that: the thickness of the gasket between the platform and the protrusion is 1 mm. 5. A detachable gel pen tip according to claim 1, characterized in that: the radius of curvature of the spherical surface at the front end of the sleeve is slightly larger than the radius of curvature of the ball by 0.05-0.1mm. 6. A detachable gel pen tip according to claim 1, characterized in that: the diameter of the round hole on the spherical surface of the front end of the sleeve is 0.6-0.8 times the diameter of the ball.

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