A magnetic pen that is convenient to carry around

Abstract

The present invention provides a magnetic fountain pen that is easy to carry around. The pen body has an ink dispenser built in. The ink dispenser includes an ink storage tube with open ends, a piston built in the ink storage tube and equipped with a rectangular magnet, and a movable tube sleeved on the ink storage tube; the movable tube has an arc-shaped receiving groove opposite to the side wall facing the ink storage tube to accommodate a traction piece, the traction piece is arranged on the axial outer side of the magnetic pole of the rectangular magnet, and the traction piece has ferromagnetism; the ink storage tube has a convex portion opposite to the lateral receiving area not covered by the arc-shaped receiving groove, and the side wall of the movable tube facing the ink storage tube forms a groove portion that is engaged with the convex portion to limit the movable tube from rotating along the ink storage tube. The present application engages the convex portion of the ink storage tube with the groove of the movable tube, so that when an external ferromagnetic component acts, the traction piece will not be displaced due to the attraction of the external ferromagnetic component, thereby avoiding the displacement of the rectangular magnet attracted by the traction piece, and preventing the displacement of the piston due to the displacement of the rectangular magnet and ink leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of writing instruments, and particularly to a magnetic pen that is convenient to carry around. Background Art

[0002] Pens can be classified into tail-press pens, push-pull pens, spiral pens, and magnetic pens according to different ink fillers. Tail-press pens need to be quickly and forcefully pressed on the ink storage tube several times to fill the ink. When pressing the ink storage tube, the nib is likely to touch the bottom of the ink bottle, causing damage to the nib and being inconvenient to use; push-pull pens and spiral pens suck ink by driving a piston to move through pushing or rotating a lever, but the lever will increase the length of the pen, making it inconvenient to carry. Magnetic pens are provided with a magnetic structure in the piston, and the piston is driven to move by the magnetic structure to suck ink. However, in the existing magnetic pens, the piston is prone to move due to the attraction of external ferromagnetic components, resulting in ink leakage. For example, in some magnetic pens, a magnetic sleeve is sleeved outside a cylindrical magnetic piston. The cylindrical magnetic piston is prone to move due to the attraction of external ferromagnetic components, resulting in ink leakage. Moreover, placing the magnetic tube sleeve outside the cylindrical magnetic piston causes the magnetic force to always be biased to one side, making it impossible to suck ink smoothly; in some magnetic pens, magnets are provided on the pen cap, the tail of the pen barrel, and the piston. However, the piston of this type of magnetic pen is also prone to move due to the attraction of external ferromagnetic components, resulting in ink leakage. In addition, it is necessary to rely on the magnet on the pen cap to attract the magnet on the piston, so that the magnet on the piston can get rid of the attraction of the magnet at the tail of the pen barrel and move the piston, which is likely to cause the remaining ink in the magnetic pen to splash; in some magnetic pens, an iron object is used to attract the magnetic piston to move on the side wall. However, attracting the magnetic piston only on one side is likely to cause the magnet in the magnetic piston to tilt and turn over, resulting in ink leakage.

[0003] In view of this, it is necessary to improve the magnetic pen in the prior art to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a magnetic pen that is convenient to carry around, so as to solve the problems raised in the above background art, and particularly aims to solve the problem that the magnetic piston is prone to move due to the attraction of external ferromagnetic components, resulting in ink leakage.

[0005] To achieve the above purpose, the present invention provides a magnetic pen that is convenient to carry around, including a pen barrel, an ink filler built in the pen barrel, a pen grip connected to the pen barrel, and a pen cap screwed to the pen barrel. The ink filler includes an ink storage tube with openings at both ends, a piston built in the ink storage tube and configured with a rectangular magnet, and a moving tube sleeved on the ink storage tube;

[0006] The side wall of the moving tube facing the ink storage tube is oppositely formed with an arc-shaped receiving groove for receiving a traction sheet. The traction sheet is disposed around the axial outer side of the magnetic pole of the rectangular magnet, and the traction sheet is ferromagnetic;

[0007] On the lateral receiving area of the ink storage tube that is not covered by the arc-shaped receiving groove, a convex portion is formed opposite to it. On the side wall of the moving tube facing the ink storage tube, a groove portion is formed that engages with the convex portion to limit the rotation of the moving tube along the ink storage tube.

[0008] As a further improvement of the present invention, a first thread is formed on the side wall of the moving tube away from the ink storage tube, and a second thread is formed on the side wall of the pen barrel facing the ink storage tube. The first thread and the second thread are engaged with each other.

[0009] As a further improvement of the present invention, retaining walls are respectively formed on the end faces of the arc-shaped receiving grooves facing the pen barrel. When the moving tube moves axially along the ink storage tube, the retaining walls and the traction sheets always fit against the outer side wall of the ink storage tube;

[0010] The height of the arc-shaped receiving groove perpendicular to the piston is equal to the height of the rectangular magnet perpendicular to the piston.

[0011] As a further improvement of the present invention, the pen grip forms a platform facing the pen barrel that abuts against the end face of the pen barrel close to the pen grip. The platform protrudes towards the ink storage tube to form a boss. The boss communicates with the inner core of the pen grip to form a through hole. The ink storage tube is elastic and closely adheres to the outer side wall of the boss.

[0012] As a further improvement of the present invention, the platform forms an annular connecting portion radially outward along the boss, and the annular connecting portion is buckled with the pen barrel.

[0013] As a further improvement of the present invention, a first annular groove is formed on the side wall of the annular connecting portion facing the pen barrel, and a second annular groove is formed on the side wall of the pen barrel opposite to the first annular groove. The first annular groove and the second annular groove are buckled to construct a receiving cavity for accommodating a rubber ring to limit the axial movement of the pen barrel and the pen grip.

[0014] As a further improvement of the present invention, a chamfer with an angle of 45° to the horizontal plane where the end face is located is formed on the end face of the pen barrel facing the pen grip.

[0015] As a further improvement of the present invention, the pen barrel is coaxially arranged with the ink storage tube, and a ventilation hole is coaxially formed on the end face of the pen barrel far from the pen grip and with the ink storage tube. A non-ferromagnetic spacer is formed on the end face of the rectangular magnet facing the ventilation hole.

[0016] As a further improvement of the present invention, when the piston moves axially along the ink storage tube, the piston and the rectangular magnet always fit against the inner side wall of the ink storage tube.

[0017] As a further improvement of the present invention, both the pen barrel and the ink storage tube are transparent, and the distance from the end face of the pen barrel with ventilation holes to the end face of the ink storage tube away from the pen grip is 1 mm - 2 mm.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] By providing a convex portion in the ink storage tube, the groove portion in the moving tube is engaged with the convex portion, and at the same time, the second thread of the moving tube is matched with the first thread of the pen barrel. When the moving tube is attracted by an external ferromagnetic component, it will not displace, thereby avoiding the displacement of the moving tube, the traction piece in the moving tube attracting the rectangular magnet on the piston, resulting in the displacement of the rectangular magnet, and further causing the displacement of the piston and ink leakage; at the same time, a rubber ring is provided between the pen grip and the pen barrel, and the rubber ring can prevent the pen grip and the pen barrel from separating when the pen barrel rotates, thereby avoiding ink leakage from the connection portion due to the separation of the pen grip and the pen barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a state of an ink filling device of a magnetic attraction type pen which is convenient to carry with for the present invention;

[0021] Figure 2 is Figure 1 a partial enlarged view of the circled G in

[0022] Figure 3 is a top view of a magnetic attraction type pen which is convenient to carry with;

[0023] Figure 4 is a positional relationship diagram of the convex portion, the arc-shaped receiving groove and the rectangular magnet;

[0024] Figure 5 is another positional relationship diagram of the convex portion, the arc-shaped receiving groove and the rectangular magnet;

[0025] Figure 6 is a top view of the moving tube;

[0026] Figure 7 is a cross-sectional view of the moving tube along the arrow L-L direction;

[0027] Figure 8 is a front view of the piston, the rectangular magnet and the spacer;

[0028] Figure 9 is a top view of the traction piece;

[0029] Figure 10 is a top view of the piston, the ink storage tube and the moving tube;

[0030] Figure 11 is a top view of the ink storage tube and the pen grip;

[0031] Figure 12 is the front view of the pen grip and the ink storage tube;

[0032] Figure 13 is the schematic structural view of the pen shaft and the ink storage tube;

[0033] Figure 14 is Figure 13 the enlarged partial view at the position of circle E in

[0034] Figure 15 the schematic structural view of another state of the ink filling device in the magnetically attracted pen which is convenient to carry with. Specific Embodiment

[0035] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. It should be noted that these embodiments are not intended to limit the present invention. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0036] It should be noted that the downward movement proposed in this embodiment refers to the movement along the direction shown by arrow A, the upward movement refers to the movement along the direction shown by arrow B, the clockwise direction refers to the direction shown by arrow C, and the counterclockwise direction refers to the direction shown by arrow D.

[0037] Please refer to Figures 1 to 15 a specific embodiment of a magnetically attracted pen 100 that is convenient to carry with according to the present invention as shown. The magnetically attracted pen 100 that is convenient to carry with includes a pen shaft 10 and a pen grip 20. The pen shaft 10 is internally provided with an ink filling device 110. The ink filling device 110 includes an ink storage tube 11, a piston 12, a rectangular magnet 13, and a moving tube 14. The pen grip 20 includes a nib 22, a pen tongue capillary 23, a rubber ring 25, and a through hole 24. By providing a protrusion 111 on the ink storage tube 11 and a groove 143 on the moving tube 14 that is fitted with the protrusion 111, the moving tube 14 is fitted onto the ink storage tube 11, preventing the traction piece 145 inside the moving tube 14 from being attracted by an external ferromagnetic component (not shown) and rotating, which may cause the rectangular magnet 13 inside the ink storage tube 11 to drive the piston 12 to rotate and leak liquid (such as ink). Exemplarily, the ink storage tube 11 forms protrusions 111 opposite to each other, and the side wall of the moving tube 14 facing the ink storage tube 11 forms grooves 143 that are fitted with the protrusions 111. The grooves 143 of the moving tube 14 are fitted with the protrusions 111 of the ink storage tube 11 to fit the moving tube 14 onto the ink storage tube 11. When the traction piece 145 is attracted by an external ferromagnetic component (not shown), the moving tube 14 will not rotate due to the attraction of the traction piece 145, and thus will not drive the piston 12 provided with the rectangular magnet 13 to rotate, thereby avoiding the occurrence of ink leakage.

[0038] Specifically, the magnetically attracted pen 100 that is convenient to carry includes a pen barrel 10 and an ink feeder 110 built in the pen barrel 10. The ink feeder 110 includes an ink storage tube 11, a piston 12 built in the ink storage tube 11 and configured with a rectangular magnet 13, and a moving tube 14 sleeved on the ink storage tube 11. The ink storage tube 11 oppositely forms a convex portion 111, and the side wall of the moving tube 14 facing the ink storage tube 11 forms a groove portion 143 that fits with the convex portion 111. The side wall of the moving tube 14 facing the ink storage tube 11 oppositely forms an arc-shaped receiving groove 141 for receiving a traction sheet 145, and the traction sheet 145 is disposed around the outer side of the axial direction (i.e., the Y axis) of the magnetic pole 131 of the rectangular magnet 13. The fitting of the convex portion 111 and the groove portion 143 prevents the moving tube 14 from rotating when attracted by an external ferromagnetic component (not shown), and prevents the piston 12 configured with the rectangular magnet 13 from being displaced due to the rotation of the moving tube 14, thereby preventing ink leakage.

[0039] It should be noted that the second thread 101 in the pen barrel 10 engages with the first thread 144 of the moving tube 14, which can not only prevent the moving tube 14 from moving along the Z axis when attracted by an external ferromagnetic component (not shown), but also when the pen barrel 10 is rotated, the second thread 101 in the pen barrel 10 can drive the first thread 144 of the moving tube 14 to move, so that the moving tube 14 moves upward or downward, thereby enabling the traction sheet 145 in the moving tube 14 to drive the rectangular magnet 13 on the piston 12 to move, and then the piston 12 moves, and further ink is sucked. When the pen barrel 10 rotates, the pen grip 20 is prevented from separating from the pen barrel 10 due to the blocking of the rubber ring 25. The arc-shaped receiving groove 141 for receiving the traction sheet 145 is opposite to the magnetic pole 131 of the rectangular magnet 13, so as to ensure that the rectangular magnet 13 has a strong attraction to the traction sheet 145, and the rectangular magnet 13 can move along with the traction sheet 145 when the traction sheet 145 moves. Since the present application realizes ink absorption by rotating the pen barrel 10, there is no need to use a push-pull rod (not shown) or a screw rod (not shown), thereby shortening the length of the pen barrel 10 and facilitating carrying.

[0040] See Figures 1 to 14As shown, the magnetically-attractable pen 100 that is convenient to carry includes a pen barrel 10 and an ink feeder 110 built into the pen barrel 10. The ink feeder 110 includes an ink storage tube 11 with openings 113 at both ends, a piston 12 built into the ink storage tube 11 and configured with a rectangular magnet 13, and a moving tube 14 sleeved on the ink storage tube 11. The pen cap 30, the pen barrel 10, the ink storage tube 11, the piston 12, and the moving tube 14 can be made of plastic (for example, polypropylene plastic) or can be made of inorganic materials (for example, glass or titanium alloy), thereby avoiding interference with the rectangular magnet 13 and the traction piece 145. The pen barrel 10 and the ink storage tube 11 are transparent to facilitate observing the usage and ink filling of the ink. The distance (i.e., distance L2) from the end face 107 of the pen barrel 10 with the air vent hole 16 to the end face of the ink storage tube 11 away from the pen grip 20 is 1 mm - 2 mm, so that the rectangular magnet 13 cannot be disengaged from the ink storage tube 11, and it can be avoided that when the traction piece 145 attracts the rectangular magnet 13 to move, the rectangular magnet 13 is disengaged from the ink storage tube 11, resulting in ink leakage. At the same time, when the pen barrel 10 rotates, the pen barrel 10 does not contact the ink storage tube 11, so that interference caused by the contact between the ink storage tube 11 and the pen barrel 10 during the rotation of the pen barrel 10 can be avoided. Preferably, the end face 107 of the pen barrel 10 with the air vent hole 16 is thickened to increase the distance between the rectangular magnet 13 and the traction piece 145 and an external ferromagnetic component (not shown), further reducing the interference of the external ferromagnetic component (not shown) on the rectangular magnet 13 and the traction piece 145. The pen barrel 10 and the ink storage tube 11 are coaxial (i.e., axis Z), and the end face 107 of the pen barrel 10 away from the pen grip 20 forms an air vent hole 16, and the air vent hole 16 can balance the air pressure in the pen barrel 10. The end face 107 of the rectangular magnet 13 facing the air vent hole 16 is covered with a non-ferromagnetic spacer 15, and the spacer 15 can reduce the attraction of an external ferromagnetic component (not shown) to the rectangular magnet 13. When an external ferromagnetic component (not shown) is located at the end face 107 of the pen barrel 10 with the air vent hole 16, the rectangular magnet 13 is easily attracted by the external ferromagnetic component (not shown) at the end face 107 of the pen barrel 10 with the air vent hole 16 and moves along the axis Z, resulting in ink leakage. The spacer 15 can cover the end face 107 of the rectangular magnet 13 facing the air vent hole 16, further reducing the interference of the external ferromagnetic component (not shown) on the rectangular magnet 13, thereby avoiding ink leakage caused by the interference of the external ferromagnetic component (not shown) on the rectangular magnet 13. In addition, the spacer 15 can also play a role in dust prevention. Preferably, the spacer 15 can be made of rubber, which can not only isolate the interference of the external ferromagnetic component (not shown) on the rectangular magnet 13, but also play a role in dust prevention and shock absorption.

[0041] Preferably, a pen cap 30 can be sleeved on the pen barrel 10. External threads 102 matching the pen cap 30 are constructed on the side walls of the pen barrel 10 near and far from the pen grip 20. When the portable magnetic pen 100 is in an unused state, the pen cap 30 can be sleeved on the external thread 102b near the pen grip 20 to protect the pen tip 22 and prevent ink leakage, and at the same time prevent the pen grip 20 from moving, rotating or separating from the pen barrel 10 due to external interference; when the portable magnetic pen 100 is in a used state, the pen cap 30 can be sleeved on the external thread 102a constructed far from the pen grip 20 to increase the length of the portable magnetic pen 100 and improve the comfort during writing. The pen cap 30 can also be provided with a pen clip 31 to clip the portable magnetic pen 100 on clothes, paper, etc. for easy carrying.

[0042] As shown Figures 3 to 13 in the figure, the rectangular magnet 13 faces the ventilation hole 16, and the piston 12 faces the through hole 24 and fits with the ink storage tube 11. Since the rectangular magnet 13 faces the ventilation hole 16, the piston 12 faces the through hole 24, so as to ensure that the piston 12 can generate negative pressure in the ink storage tube 11 and suck ink smoothly. The traction sheet 145 is disposed around the axial direction (i.e., the Y-axis) of the magnetic pole 131 of the rectangular magnet 13. The magnetic induction intensities of the magnetic poles 131 of the rectangular magnet 13 are the same, that is, the magnetic induction intensities of the N pole and the S pole are the same. Therefore, the attraction force of the traction sheet 145 on the rectangular magnet 13 is uniform and symmetric, avoiding ink leakage caused by the inclination of the rectangular magnet 13 due to uneven attraction force of the traction sheet 145. The piston 12 is preferably an elastic cylindrical structure and the diameter of the piston 12 is equal to the inner diameter of the ink storage tube 11, so as to ensure that the liquid in the ink storage tube 11 will not leak from the piston 12. The magnetic pole 131 is opposite to the arc-shaped receiving groove 141 in the moving tube 14 that accommodates the traction sheet 145, and the arc-shaped receiving groove 141 can increase the attraction force of the rectangular magnet 13 on the traction sheet 145 as much as possible, so as to ensure that the traction sheet 145 drives the rectangular magnet 13 to move. It should be noted that the positions of the magnetic poles 131 of the rectangular magnet 13, that is, the N pole and the S pole, are not specifically limited. It can be that the magnetic pole 131a is the N pole and the magnetic pole 131b is the S pole, or the magnetic pole 131b is the N pole and the magnetic pole 131a is the S pole.

[0043] It should be noted that the rectangular magnet 13 is a columnar structure and any cross section obtained by cutting along a horizontal plane perpendicular to the Z axis is a rectangle, preferably a rectangle and the long side of the rectangle corresponds to the magnetic pole 131 of the rectangular magnet 13. The rectangular magnet 13 with a rectangular cross section can increase the plane where the magnetic pole 131 is located, and increase the attraction of the magnetic pole 131 to the traction plate 145. When the piston 12 moves along the axial direction of the ink storage tube 11 (that is, moves along the Z axis), the piston 12 and the rectangular magnet 13 always fit the inner wall of the ink storage tube 11, thereby preventing the occurrence of ink leakage due to the tilt of the rectangular magnet 13. The rectangular magnet 13 is preferably a neodymium iron boron magnet, which has super strong magnetism and thus has a strong attraction to the traction plate 145.

[0044] It should be noted that in this embodiment, the piston 12 is provided with a rectangular magnet 13, and the traction piece 145 is ferromagnetic. A rectangular structure with ferromagnetism can also be provided on the piston 12, and the traction piece 145 is a magnet. Based on the consideration of the attraction of the traction piece 145 to the piston 12, the rectangular magnet 13 is provided on the piston 12, and the traction piece 145 is ferromagnetic. However, all magnetic attraction structures based on the concept of the present invention are within the protection scope of this application.

[0045] Ginseng Figures 4 to 7As shown, on the side wall of the movable tube 14 facing the ink storage tube 11, an arc-shaped receiving groove 141 for receiving the traction piece 145 is formed oppositely. The traction piece 145 is disposed around the outer side of the axial direction (i.e., the Y-axis) of the magnetic pole 131 of the rectangular magnet 13, and the traction piece 145 is ferromagnetic. The arc-shaped receiving groove 141 surrounding the magnetic pole 131 of the rectangular magnet 13 can ensure that the attraction force of the traction piece 145 on the rectangular magnet 13 is the largest, and the movable tube 14 can drive the piston 12 to move more smoothly. The oppositely arranged arc-shaped receiving grooves 141 can ensure that the attraction force of the traction piece 145 on the rectangular magnet 13 is symmetric, thereby avoiding the inclination of the rectangular magnet 13 caused by only one side being stressed, and further avoiding liquid leakage. Exemplarily, the traction piece 145 is preferably an arc-shaped traction piece 145. Preferably, the inner arc length of the traction piece 145 is one-third of the inner circumference of the movable tube 14, and the height of the traction piece 145 (i.e., height h1) is equal to the height of the rectangular magnet 13 perpendicular to the piston 12 (i.e., height h2). Therefore, the attraction force between the traction piece 145 and the rectangular magnet 13 is the largest, so as to smoothly drive the piston 12 on the rectangular magnet 13 to move. The magnetic pole 131 of the rectangular magnet 13 and the traction piece 145 are located on the same axis (i.e., the straight line Y). Therefore, the attraction force between the magnetic pole 131 of the rectangular magnet 13 and the traction piece 145 is the largest, and the traction piece 145 can better guide the movement of the rectangular magnet 13, avoiding the situation that the rectangular magnet 13 cannot move due to the small attraction force between the traction piece 145 and the rectangular magnet 13, and further causing the piston 12 to be unable to move and unable to absorb ink. When the piston 12 moves along the axial direction of the ink storage tube 11 (i.e., moves along the Z-axis), the piston 12 always fits the inner side wall of the ink storage tube 11, avoiding liquid leakage from the piston 12 when the piston 12 moves along the ink storage tube 11.

[0046] On the lateral receiving area 112 of the ink storage tube 11 not covered by the arc-shaped receiving groove 141, a convex portion 111 is formed oppositely. The side wall of the movable tube 14 facing the ink storage tube 11 forms a groove portion 143 that engages with the convex portion 111 to limit the rotation of the movable tube 14 along the ink storage tube 11. When the movable tube 14 is in contact with the ink storage tube 11 and the movable tube 14 moves along the axial direction of the ink storage tube 11 (i.e., moves along the Z-axis), the traction piece 145 in the arc-shaped receiving groove 141 will cover the outer side wall of the ink storage tube 11. Then, the area of the outer side wall of the ink storage tube 11 not covered by the arc-shaped receiving groove 141 is the lateral receiving area 112, and the ink storage tube 11 forms a convex portion 111 oppositely in the lateral receiving area 112. For the position of the convex portion 111, it can be as Figure 3 shown, the convex portion 111 is equidistant from the oppositely formed arc-shaped receiving groove 141, or it can be as Figure 4As shown, the distances from the convex portion 111 to the arc-shaped receiving groove 141 are not equal. Any structure that can fit the convex portion 111 with the groove portion 143 to restrict the rotation of the moving tube 14 along the ink storage tube 11 is acceptable. The fitting of the convex portion 111 with the groove portion 143 can prevent the traction sheet 145 from being displaced by the attraction of an external ferromagnetic component (not shown). When the traction sheet 145 is displaced by the attraction of an external ferromagnetic component (not shown), it will cause the rectangular magnet 13 to drive the piston 12 to be displaced, resulting in ink leakage.

[0047] When the traction sheet 145 in the arc-shaped receiving groove 141 of the moving tube 14 is attracted by an external ferromagnetic component (not shown), the convex portion 111 formed oppositely on the ink storage tube 11 fits with the groove portion 143 of the moving tube 14, ensuring that the moving tube 14 will not rotate due to the action of the external ferromagnetic component (not shown) on the traction sheet 145. When the second thread 101 engages with the first thread 144, the moving tube 14 will not move along the Z-axis due to the action of the external ferromagnetic component (not shown) on the traction sheet 145. Then, the traction sheet 145 in the moving tube 14 will not generate an attractive force on the rectangular magnet 13 to cause the rectangular magnet 13 to rotate or move along the Z-axis. At the same time, the traction sheet 145 can reduce the interference of the external ferromagnetic component (not shown) on the rectangular magnet 13. Therefore, it is avoided that the piston 12 connected to the rectangular magnet 13 rotates or moves along the Z-axis, resulting in liquid leakage.

[0048] It should be noted that in this embodiment, the shapes of the convex portion 111 and the groove portion 143 are arc-shaped. The shapes of the convex portion 111 and the groove portion 143 can also be square, dovetail groove type or other shapes, as long as the convex portion 111 of the ink storage tube 11 can be fitted with the groove portion 143 of the moving tube 14 to restrict the rotation of the moving tube 11 along the ink storage tube 14.

[0049] The end faces of the arc-shaped receiving groove 141 facing the pen barrel 10 (i.e., end face 107 and end face 108) respectively form retaining walls 142. When the moving tube 14 moves axially along the ink storage tube 11 (i.e., moves along the Z-axis), the retaining walls 142 and the traction piece 145 always fit against the outer side wall of the ink storage tube 11. The end faces of the arc-shaped receiving groove 141 facing the pen barrel 10 (i.e., end face 107 and end face 108) respectively form retaining walls 142, which can prevent the traction piece 145 accommodated in the arc-shaped receiving groove 141 from coming out. At the same time, the retaining wall 142 formed on the end face 107 where the air vent 16 of the pen barrel 10 is located can increase the distance between the traction piece 145 and the end face 107 of the pen barrel 10 with the air vent 16, further preventing an external ferromagnetic component (not shown) from generating an attractive force on the traction piece 145 at the end face 107 of the pen barrel 10 with the air vent 16 and causing the traction piece 145 to move, thereby avoiding the ink leakage phenomenon caused by the movement of the traction piece 145 driving the piston 12 to move by the rectangular magnet 13. When the moving tube 14 moves axially along the ink storage tube 11 (i.e., moves along the Z-axis), the retaining walls 142 and the traction piece 145 always fit against the outer side wall of the ink storage tube 11, that is, the width of the retaining wall 142 (i.e., width d3) is equal to the width of the traction piece 145 (i.e., width d4), which can make the traction piece 145 fit against the ink storage tube 11 and avoid the problem that the traction piece 145 cannot fit against the ink storage tube 11 due to the blockage of the retaining wall 142, resulting in poor attraction of the traction piece 145 to the rectangular magnet 13. The height of the retaining wall 142 perpendicular to the traction piece 145 (i.e., height h3) is equal to the height of the spacer 15 perpendicular to the rectangular magnet 13 (i.e., h4), which can not only ensure the maximum attractive force of the traction piece 145 to the rectangular magnet 13, but also avoid the interference of an external ferromagnetic component (not shown) to the rectangular magnet 13. When the ink storage tube 11 is filled with ink, the moving tube 14 abuts against the end face 107 of the pen barrel 10 with the air vent 16, and at the same time, the spacer 15 also abuts against the end face 107 of the pen barrel 10 with the air vent 16, so that the rectangular magnet 13 can be prevented from being attracted by an external ferromagnetic component (not shown) and moving in the direction B.

[0050] See Figure 1 and Figure 15As shown, a first thread 144 is formed on the side wall of the movable tube 14 away from the ink storage tube 11, and a second thread 101 is formed on the side wall of the pen barrel 10 facing the ink storage tube 11. The second thread 101 and the first thread 144 are engaged. The second thread 101 in the pen barrel 10 is engaged with the second thread 101 of the movable tube 14, which can not only prevent the movable tube 14 from rotating or moving along the Z-axis when the movable tube 14 is attracted by an external ferromagnetic component (not shown), but also when the pen barrel 10 is rotated, the second thread 101 in the pen barrel 10 can drive the first thread 144 of the movable tube 14 to move, so that the movable tube 14 moves downward or upward. The traction piece 145 in the movable tube 14 drives the rectangular magnet 13 on the piston 12 to move, so that the piston 12 moves, thereby sucking the liquid. The second thread 101 and the first thread 144 are preferably double-start trapezoidal threads and are right-handed threads. The double-start trapezoidal threads can make the movable tube 14 move upward or downward at a uniform and appropriate speed, without causing ink splashing, and at the same time, it will not cause a large number of air bubbles to appear in the ink storage tube 11 due to the too fast moving speed of the piston 12, affecting the ink storage capacity of the ink storage tube 11, and avoiding ink breakage caused by air bubbles during writing, which affects writing.

[0051] As shown in Figure 1 Figure 2 Figure 11 Figure 12 and Figure 15 As shown in

[0052] The platform 29 forms an annular connecting portion 26 radially outward along the boss 27, and the annular connecting portion 26 is snapped into the pen barrel 10. A first annular groove 261 is formed on the side wall of the annular connecting portion 26 facing the pen barrel 10, and a second annular groove 104 is formed on the side wall of the pen barrel 10 opposite to the first annular groove 261. The first annular groove 261 and the second annular groove 104 are snapped together to construct a receiving cavity 250 for accommodating the rubber ring 25 to limit the separation of the pen barrel 10 from the pen grip 20. The side wall of the annular connecting portion 26 facing the pen barrel 10 is in a smooth state. When the pen grip 20 is connected to the pen barrel 10, the end face 108 of the pen barrel 10 facing the pen grip 20 abuts against the platform 29 of the pen grip 20 radially outward of the annular connecting portion 26. At the same time, the pen barrel 10 is snapped together with the annular connecting portion 26, and the rubber ring 25 is located in the receiving cavity 250 to limit the separation of the pen barrel 10 from the pen grip 20, that is, to prevent the pen barrel 10 from moving upward and the pen grip 20 from moving downward during the rotation of the pen barrel 10, so that the end face 108 of the pen barrel 10 facing the pen grip 20 cannot abut against the platform 29 on the pen grip 20, resulting in a position offset between the pen barrel 10 and the pen grip 20, and further resulting in ink leakage.

[0053] Preferably, the cross-sectional diameter of the rubber ring 25 along the Z-axis (i.e., diameter d2) is 0.2 - 0.4 mm larger than the diameter of the accommodation cavity 250 formed by the first annular groove 261 and the second annular groove 104 (i.e., diameter d1). If the diameter of the rubber ring 25 (i.e., diameter d2) is equal to or smaller than the diameter of the accommodation cavity 250 (i.e., diameter d1), the rubber ring 25 cannot play a damping role on the pen barrel 10 and the pen grip 20. When the portable magnetic pen 100 is in the non-ink-absorbing state, there is no damping effect of the rubber ring 25 between the pen barrel 10 and the pen grip 20, and the pen barrel 10 is prone to rotate under external force, resulting in displacement of the moving tube 14 and the piston 12 and ink leakage. When the portable magnetic pen 100 is in the ink-absorbing state and the pen barrel 10 rotates, the pen grip 20 is likely to separate from the pen barrel 10. If the diameter of the rubber ring 25 (i.e., diameter d2) is too large, the rubber ring 25 cannot be installed into the accommodation cavity 250. At the same time, a chamfer 106 with an angle (i.e., angle F) of 45° is formed on the end face 108 of the pen barrel 10 facing the pen grip 20 with respect to the horizontal plane (i.e., horizontal plane X) where the end face 108 is located. The chamfer 106 can guide the rubber ring 25 into the accommodation cavity 250, and the rubber ring 25 entering the accommodation cavity 250 along the chamfer 106 can be gradually compressed and deformed. Before the pen barrel 10 is snapped into the pen grip 20, the rubber ring 25 is attached to the first annular groove 261. When the connecting portion of the pen grip 20 is inserted into the pen barrel 10, the chamfer 106 on the pen barrel 10 first contacts the rubber ring 25. The chamfer 106 with an angle (i.e., angle F) of 45° with respect to the horizontal plane (i.e., horizontal plane X) where the end face 108 is located can gradually compress the rubber ring 25 to cause elastic deformation. Subsequently, the second thread 101 on the pen barrel 10 contacts the rubber ring 25, further compressing the rubber ring 25 while preventing the rubber ring 25 from moving. The chamfer 106 and the second thread 101 on the pen barrel 10 gradually compress the rubber ring 25 to deform the rubber ring 25. When the pen barrel 10 and the annular connecting portion 26 of the pen grip 20 are engaged, the pen barrel 10 and the pen grip 20 are connected. At this time, the rubber ring 25 just restores its deformation and is located in the accommodation cavity 250 formed by enclosing the first annular groove 261 of the pen grip 20 and the second annular groove 104 of the pen barrel 10. Therefore, the pen barrel 10 and the pen grip 20 can rotate with damping but cannot move upward or downward. The rubber ring 25 can ensure that while the pen barrel 10 rotates to absorb liquid, the pen barrel 10 and the pen grip 20 do not move in the direction of arrow A or arrow B, preventing the pen barrel 10 and the pen grip 20 from separating and leaking ink. When the rubber ring 25 is severely worn, the pen grip 20 can be removed to replace the rubber ring 25, which is convenient for replacement.

[0054] The pen grip 20 further includes a nib 22 and a feed capillary 23 of the feed section. The feed capillary 23 of the feed section guides the ink in the ink storage tube 11 to the nib 22, so that writing can be performed through the nib 22. When sucking ink, the nib 22 can also be inserted into the ink, and a negative pressure is generated in the ink storage tube 11 by the movement of the piston 12. The ink flows along the nib 22 and is guided into the ink storage tube 11 through the feed capillary 23 of the feed section, completing the ink sucking. The pen grip 20 is applicable to both exposed nib structures and concealed nib structures. It should be noted that the pen barrel 10, the pen grip 20 and the pen cap 30 are all made of non-ferromagnetic materials to prevent the pen barrel 10, the pen grip 20 and the pen cap 30 from affecting the attraction between the traction piece 145 and the rectangular magnet 13.

[0055] See Figure 1 and Figure 15As shown, when assembling the magnetically-attractable pen 100 that is convenient to carry around, the ink storage tube 11 is sleeved on the boss 27, and the piston 12 with the rectangular magnet 13 is inserted into the ink storage tube 11 from the open end 113 of the ink storage tube 11 that is not connected to the boss 27. The groove portion 143 of the moving tube 14 is fitted into the protruding portion 111 of the ink storage tube 11, and at the same time, the traction piece 145 is attached to the outer side wall of the ink storage tube 11. The pen barrel 10 is sleeved on the ink storage tube 11 and further sleeved on the moving tube 14 by rotating the pen barrel 10. The pen barrel 10 is continuously rotated to move the moving tube 14 to any position in the middle of the pen barrel 10. Then the pen barrel 10 is sleeved on the annular connecting portion 26 of the pen grip 20. When the pen barrel 10 is moved downward and rotated clockwise, the chamfer 106 and the second thread 101 at the pen barrel 10 jointly compress and drag the rubber ring 25 located in the first annular groove 261, so that the rubber ring 25 enters the second annular groove 104. When the rubber ring 25 resumes its elastic deformation and fills the accommodation cavity 250, the pen barrel 10 and the pen grip 20 can rotate relative to each other but cannot be separated relatively. Therefore, the magnetically-attractable pen 100 that is convenient to carry around is convenient to assemble, disassemble and repair. Before ink absorption, the pen barrel 10 is rotated counterclockwise, then the second thread 101 of the pen barrel 10 drives the first thread 144 on the moving tube 14 that engages with the second thread 101 to move downward, and the moving tube 14 thus moves downward. When the moving tube 14 moves downward, the traction piece 145 in the moving tube 14 moves downward accordingly. Since the traction piece 145 is ferromagnetic, the downward movement of the traction piece 145 drives the downward movement of the rectangular magnet 13 and the spacer 15 in the ink storage tube 11. The spacer 15 then disengages from the contact with the inner wall of the end face 107 of the pen barrel 10 and opens the ventilation hole 16. The downward movement of the rectangular magnet 13 drives the piston 12 to move downward. When the moving tube 14 moves to contact the annular connecting portion 26, the pen barrel 10 cannot continue to rotate counterclockwise, and the moving tube 14 stops moving downward. At this time, the piston 12 moves downward to above the through hole 24. When ink absorption is carried out, the nib 22 of the pen grip 20 is inserted into the ink, and the pen barrel 10 is rotated clockwise, then the second thread 101 of the pen barrel 10 drives the first thread 144 on the moving tube 14 that engages with the second thread 101 to move upward, and the moving tube 14 thus moves upward. When the moving tube 14 moves upward, the traction piece 145 in the moving tube 14 moves upward accordingly. Since the traction piece 145 is ferromagnetic, the upward movement of the traction piece 145 drives the upward movement of the rectangular magnet 13 in the ink storage tube 11. The upward movement of the rectangular magnet 13 drives the piston 12 to move upward. The upward movement of the piston 12 will generate negative pressure in the ink storage tube 11, thereby sucking the ink into the ink storage tube 11 through the nib 22 and the through hole 24. As the piston 12 moves upward, the ink is also sucked into the ink storage tube 11 accordingly.During the entire movement of the piston 12, due to the engagement of the second thread 101 and the first thread 144, the piston 12 moves uniformly and slowly, without splashing ink. At the same time, it avoids a large number of bubbles being generated in the ink storage tube 11 due to the piston 12 moving too fast, which affects the ink storage capacity of the ink storage tube 11, and prevents writing from being interrupted due to bubbles generated in the ink storage tube 11 during writing, thus affecting the writing experience. After the portable magnetic pen 100 is used up, the pen cap 30 can be buckled onto the external thread 102 of the pen barrel 10. Since the convex portion 111 of the ink storage tube 11 is fitted with the groove portion 143 in the moving tube 14, when the traction piece 145 in the moving tube 14 is attracted by an external ferromagnetic component (not shown), the moving tube 14 cannot move, so as to avoid ink leakage caused by the movement of the piston 12 due to the movement of the moving tube 14.

[0056] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation manners or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0058] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic pen that is convenient to carry around, comprising a pen barrel, an ink feeder built into the pen barrel, a pen grip connected to the pen barrel, and a pen cap screwed onto the pen barrel, characterized in that, The ink feeder includes an ink storage tube with openings at both ends, a piston built into the ink storage tube and configured with a rectangular magnet, and a moving tube sleeved on the ink storage tube; The side wall of the moving tube facing the ink storage tube is oppositely formed with an arc-shaped receiving groove for receiving a traction piece, the traction piece is disposed around the axial outer side of the magnetic pole of the rectangular magnet, and the traction piece is ferromagnetic; The ink storage tube is oppositely formed with a protrusion in the lateral receiving area not covered by the arc-shaped receiving groove, and the side wall of the moving tube facing the ink storage tube is formed with a groove portion that fits with the protrusion to limit the rotation of the moving tube along the ink storage tube; The side wall of the moving tube away from the ink storage tube is formed with a first thread, and the side wall of the pen barrel facing the ink storage tube is formed with a second thread, and the first thread and the second thread are engaged with each other.

2. The magnetically attracted pen that is convenient to carry around according to claim 1, wherein The end faces of the arc-shaped receiving groove facing the pen barrel are respectively formed with a retaining wall, and when the moving tube moves axially along the ink storage tube, the retaining wall and the traction piece always fit against the outer side wall of the ink storage tube; The height of the arc-shaped receiving groove perpendicular to the piston is equal to the height of the rectangular magnet perpendicular to the piston.

3. The magnetically attracted pen that is convenient to carry with according to claim 2, wherein, The pen grip forms a platform that abuts against the end face of the pen barrel close to the pen grip, the platform protrudes towards the ink storage tube to form a boss, the boss is communicated with the inner core of the pen grip to form a through hole, and the ink storage tube is elastic and closely adheres to the outer side wall of the boss.

4. The magnetically attracted pen that is convenient to carry with according to claim 3, wherein The platform forms an annular connecting portion radially outward along the boss, and the annular connecting portion is buckled with the pen barrel.

5. The magnetically attracted pen that is convenient to carry with according to claim 4, wherein, The side wall of the annular connecting portion facing the pen barrel is formed with a first annular groove, and the pen barrel is formed with a second annular groove on the side wall opposite to the first annular groove, and the first annular groove and the second annular groove are buckled to construct an accommodating cavity for accommodating a rubber ring to limit the axial movement of the pen barrel and the pen grip.

6. The magnetically-attractable pen that is convenient to carry around according to claim 5, wherein, The end face of the pen barrel facing the pen grip is formed with a chamfer with an angle of 45° with the horizontal plane where the end face is located.

7. The magnetically-attractable pen that is convenient to carry around according to claim 6, wherein The pen barrel and the ink storage tube are coaxially arranged, and the pen barrel is coaxially formed with a ventilation hole at the end face away from the pen grip and coaxial with the ink storage tube, and the end face of the rectangular magnet facing the ventilation hole is covered with a non-ferromagnetic spacer.

8. The magnetically-attractable pen that is convenient to carry around according to claim 7, wherein, When the piston moves axially along the ink storage tube, the piston and the rectangular magnet always fit against the inner side wall of the ink storage tube.

9. The portable magnetic pen according to claim 8, characterized in that, Both the pen barrel and the ink storage tube are transparent, and the distance from the inner wall of the end face of the pen barrel with the ventilation hole to the end face of the ink storage tube away from the pen grip is 1 mm - 2 mm.

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