A pen barrel and pen grip combination component

Abstract

The present invention provides a pen barrel and pen grip combination member, comprising a pen barrel and a pen grip rotatably and coaxially connected to the pen barrel; the pen grip includes a platform abutting against the pen barrel, and a ring-shaped connecting portion protrudes from one side of the platform facing the pen barrel, and the ring-shaped connecting portion is axially movably screwed into the pen barrel; the outer wall surface of the ring-shaped connecting portion facing the pen barrel is smooth and forms a first annular groove, the inner wall of the pen barrel facing the first annular groove forms a second annular groove, and the inner wall of the pen barrel facing the ring-shaped connecting portion forms an internal thread; the first annular groove, the second annular groove and the internal thread jointly enclose a cavity for accommodating an annular elastic seal in a state not pressed by the internal thread. In this application, when the pen barrel rotates, the pen barrel and the pen grip cannot be separated due to the blocking effect of the annular elastic seal, so that the pen barrel can rotate and maintain the connection state with the pen grip at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of writing instruments, and in particular, to a pen barrel and pen grip combined component. Background Art

[0002] In a fountain pen, the pen barrel and the pen grip are usually connected by structures such as threads, welding, and insertion. The connection method of the pen barrel and the pen grip connected by the insertion structure is simple and easy to operate, but the connection between the pen barrel and the pen grip is not firm and is easy to separate; the pen barrel and the pen grip connected by the welding structure are firmly connected, but it is not easy to disassemble the pen barrel and the pen grip when maintenance is needed; the pen barrel and the pen grip connected by the thread structure are firmly connected and easy to disassemble. The existing thread connection is to respectively provide engaging threads on the pen barrel and the pen grip, and then screw the pen grip onto the pen barrel. However, in actual application, it is necessary to rotate the pen barrel to complete various tasks. For example, for a retractable ballpoint pen, it is necessary to rotate the pen barrel to screw out the pen core for writing; for a pen barrel spiral ink filler integrated fountain pen, it is necessary to rotate the pen barrel to suck ink; for a retractable automatic pencil, it is necessary to rotate the pen barrel to screw out the pen core for writing. At this time, the pen barrel and the pen grip will rotate relatively. Due to the particularity of the thread structure, when the pen barrel and the pen grip rotate relatively, it is easy to screw the pen grip off the pen barrel, which is inconvenient to use.

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

[0004] The purpose of the present invention is to provide a pen barrel and pen grip combined component to solve the problem that the pen barrel is easy to separate from the pen grip when rotating in the prior art.

[0005] To achieve the above purpose, the present invention provides a pen barrel and pen grip combined component, including: a pen barrel, and a pen grip rotatably and coaxially connected to the pen barrel;

[0006] The pen grip includes a platform abutting against the pen barrel. An annular connecting portion protrudes from the side of the platform facing the pen barrel, and the annular connecting portion is axially movably screwed into the pen barrel;

[0007] The outer wall surface of the annular connecting portion facing the pen barrel is smooth and forms a first annular groove. The inner wall of the pen barrel facing the first annular groove forms a second annular groove. The inner wall of the pen barrel facing the annular connecting portion forms an internal thread;

[0008] The first annular groove, the second annular groove and the internal thread jointly enclose a cavity for accommodating an annular elastic seal in a state where it is not pressed by the internal thread.

[0009] As a further improvement of the present invention, an inverted chamfer is formed at the intersection of the inner side wall of the pen barrel and the end face of the pen barrel facing the pen grip. The included angle between the inverted chamfer and the horizontal plane where the end face is located is β, and 0° < β < 90°.

[0010] As a further improvement of the present invention, during the process of screwing the pen barrel onto the annular connecting part, the inverted chamfer and the internal thread jointly press the annular elastic seal, so that the annular elastic seal is accommodated in the accommodating cavity.

[0011] As a further improvement of the present invention, the contact area between the first annular groove and the annular elastic seal is greater than or equal to the contact area between the second annular groove and the annular elastic seal, and the annular elastic seal is held by the annular connecting part through the first annular groove.

[0012] As a further improvement of the present invention, when the annular elastic seal is accommodated in the accommodating cavity, the annular elastic seal simultaneously exerts a force generated by the restoration of the deformation of the annular elastic seal on the first annular groove and the second annular groove;

[0013] When the annular elastic seal is not accommodated in the accommodating cavity, the annular elastic seal only exerts a force generated by the restoration of the deformation of the annular elastic seal on the first annular groove.

[0014] As a further improvement of the present invention, the end face always abuts against the platform during the rotation of the pen barrel.

[0015] As a further improvement of the present invention, the number of the accommodating cavities is at least one.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By providing a pen shaft and a pen grip that is rotatable and coaxially connected to the pen shaft; the pen grip includes a platform that abuts against the pen shaft, and a ring-shaped connecting portion protrudes from one side of the platform facing the pen shaft. The ring-shaped connecting portion is axially movably inserted into the pen shaft; the outer wall surface of the ring-shaped connecting portion facing the pen shaft is smooth and forms a first annular groove, the inner wall of the pen shaft facing the first annular groove forms a second annular groove, and the inner wall of the pen shaft facing the ring-shaped connecting portion forms an internal thread; the first annular groove, the second annular groove and the internal thread jointly enclose a cavity for accommodating an annular elastic seal in a state where it is not pressed by the internal thread. As a result, the annular elastic seal undergoes elastic deformation under the pressure of the chamfer and the internal thread. When the annular elastic seal is located in the cavity, the annular elastic seal returns to its original shape because it is not pressed by the internal thread. The annular elastic seal simultaneously exerts a force generated by its restoration of deformation on the first annular groove and the second annular groove, thereby generating a blocking effect between the pen shaft and the pen grip. Therefore, when the pen shaft rotates, the pen shaft and the pen grip cannot be separated due to the blocking effect of the annular elastic seal, so that the pen shaft can rotate while maintaining its connection with the pen grip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of a pen shaft and pen grip combination member of the present invention;

[0019] Figure 2 is Figure 1 a partial enlarged view of the area A in the circle;

[0020] Figure 3 is a schematic structural view of the pen shaft;

[0021] Figure 4 is Figure 3 a partial enlarged view of the area B in the circle;

[0022] Figure 5 is a schematic structural view of the pen grip;

[0023] Figure 6 is Figure 5 a partial enlarged view of the area C in the circle;

[0024] Figure 7 is a schematic structural view of the chamfer pressing the annular elastic seal in an embodiment of the present invention;

[0025] Figure 8 is Figure 7 a partial enlarged view of the area D in the circle;

[0026] Figure 9 is a schematic structural view of the internal thread pressing the annular elastic seal in an embodiment of the present invention;

[0027] Figure 10 isFigure 9 Partial enlarged view at the middle circle E;

[0028] Figure 11 Schematic structural view of the annular elastic seal in a receiving cavity in an embodiment of the present invention;

[0029] Figure 12 is Figure 11 Partial enlarged view at the middle circle F;

[0030] Figure 13 for the moving tube along Figure 11 Cross-sectional view along the L-L direction in the middle;

[0031] Figure 14 Schematic structural view when the pen barrel rotates in an embodiment of the present invention. Specific embodiments

[0032] The present invention will be described in detail below with reference to the embodiments shown in the drawings. It should be noted that these embodiments are not limitations on the present invention, and any equivalent transformation or substitution in function, method, or structure made by those of ordinary skill in the art according to these embodiments shall fall within the protection scope of the present invention.

[0033] It should be noted that the downward movement proposed in this embodiment refers to the movement along the direction indicated by arrow G, the upward movement refers to the movement along the direction indicated by arrow M, the clockwise direction refers to the direction indicated by arrow H, and the counterclockwise direction refers to the direction indicated by arrow N.

[0034] Please refer Figures 1 to 14 A specific embodiment of a pen barrel and pen grip combination member 100 of the present invention is shown. It can be applied to the connection between the pen barrel 10 and the pen grip 20, and can keep the connection state between the pen barrel 10 and the pen grip 20 during the relative rotation process. By providing a first annular groove 11 on the annular connection part 21, a second annular groove 210 and an internal thread 101 on the pen barrel 10, the first annular groove 11, the second annular groove 210 and the internal thread 101 jointly form a receiving cavity 30 for accommodating the annular elastic seal 40. The annular elastic seal 40 undergoes elastic deformation under the pressure of the chamfer 102 and the internal thread 101. When the annular elastic seal 40 is located in the receiving cavity 30, the annular elastic seal 40 restores its deformation due to being in a state not pressed by the internal thread 101. The annular elastic seal 40 simultaneously exerts a force generated by the restoration of the annular elastic seal 40 on the first annular groove 11 and the second annular groove 210, thereby generating a blocking effect between the pen barrel 10 and the pen grip 20. Therefore, when the pen barrel 10 rotates, the pen barrel 10 and the pen grip 20 cannot be separated due to the blocking effect of the annular elastic seal 40, so that the pen barrel 10 can rotate and maintain the connection state with the pen grip 20.

[0035] Specifically, a first annular groove 11 is formed on the outer sidewall 211 of the annular connecting portion 21 facing the pen barrel 10, a second annular groove 210 is formed on the inner sidewall 105 of the pen barrel 10 facing the first annular groove 11, and an internal thread 101 is formed on the inner sidewall 105 of the pen barrel 10 facing the annular connecting portion 21. The first annular groove 11, the second annular groove 210 and the internal thread 101 jointly enclose a receiving cavity 30 for receiving the annular elastic seal 40 in a state where it is not pressed by the internal thread 101. When the annular elastic seal 40 is received in the receiving cavity 30, the annular elastic seal 40 exerts a force generated by the restoration of its elastic deformation on the first annular groove 11 and the second annular groove 210. This force creates a blocking effect between the pen barrel 10 and the pen grip 20. Therefore, when the pen barrel 10 rotates to absorb ink, the pen barrel 10 and the pen grip 20 can still maintain a connected state.

[0036] It should be noted that the chamfer 102 can provide a guiding effect on the annular elastic seal 40 and gradually press the annular elastic seal 40 at the same time, causing the annular elastic seal 40 to undergo elastic deformation and making it easier to be pressed by the internal thread 101. The internal thread 101 further presses the annular elastic seal 40 and can prevent the annular elastic seal 40 from coming out of the first annular groove 11. The receiving cavity 30 is used to receive the annular elastic seal 40 and allows the pen barrel 10 and the pen grip 20 to be rotatably connected while accommodating the annular elastic seal 40. The pen barrel 10 rotates along the Z axis to longitudinally move the moving tube 16. The traction piece 161 in the moving tube 16 longitudinally moves to drive the piston 14 to longitudinally move to absorb ink. Therefore, the pen barrel 10 absorbs ink by rotation and can maintain a connected state with the pen grip 20.

[0037] See Figures 1 to 4As shown, the penholder and pen grip combination component 100 includes a penholder 10, and a pen grip 20 rotatably and coaxially connected to the penholder 10. The pen grip 20 includes a platform 22 that abuts against the penholder 10. When the penholder 10 is connected to the pen grip 20, the end surface 103 of the penholder 10 facing the pen grip 20 abuts against the platform 22 of the pen grip 20, which can strengthen the connection between the penholder 10 and the pen grip 20, avoid the positional offset between the penholder 10 and the pen grip 20 when the penholder 10 rotates, and make the rotation of the penholder 10 more stable. The platform 22 protrudes toward one side of the penholder 10 to form an annular connecting portion 21, and the annular connecting portion 21 is axially movable and screwed into the penholder 10. The pen grip 20 is screwed into the penholder 10 through the annular connecting portion 21 and is rotatably and coaxially connected to the penholder 10. The outer side wall 211 of the annular connecting portion 21 facing the pen holder 10 is smooth and forms a first annular groove 11, the inner side wall 105 of the pen holder 10 facing the first annular groove 11 forms a second annular groove 210, and the inner side wall 105 of the pen holder 10 facing the annular connecting portion 21 forms an internal thread 101. The first annular groove 11, the second annular groove 210 and the internal thread 101 together enclose a receiving chamber 30 for accommodating the annular elastic seal 40 in a state not compressed by the internal thread 101. The annular elastic seal 40 contacts the first annular groove 11 and the second annular groove 210 by being accommodated in the receiving chamber 30, thereby generating a blocking effect on the pen holder 10 and the pen grip 20 by acting on the first annular groove 11 and the second annular groove 210. The cross-sectional surface of the annular elastic seal 40 obtained by longitudinal sectioning can be circular, square or other shapes, as long as it can be accommodated in the accommodating cavity 30. It is preferably circular. The annular elastic seal 40 with a circular longitudinal cross-sectional surface is more easily compressed and bitten by the chamfer 102 and the internal thread 101, so that it can be more smoothly dragged into the accommodating cavity 30 by the internal thread 101.

[0038] Ginseng Figure 2 and Figure 6As shown, the first annular groove 11 and the second annular groove 210 can accommodate the annular elastic seal 40, so that when the pen barrel 10 rotates, the pen barrel 10 is prevented from separating from the pen grip 20 under the blocking action of the annular elastic seal 40. The contact area between the first annular groove 11 and the annular elastic seal 40 is greater than or equal to the contact area between the second annular groove 210 and the annular elastic seal 40. Before the pen barrel 10 and the pen grip 20 are screwed together, the annular elastic seal 40 is held in the first annular groove 11. During the screwing process of the pen barrel 10 and the pen grip 20, the chamfer 102 and the internal thread 101 gradually press the annular elastic seal 40 located in the first annular groove 11. Therefore, the contact area between the first annular groove 11 and the annular elastic seal 40 should be greater than or equal to the contact area between the second annular groove 210 and the annular elastic seal 40, so that the annular elastic seal 40 will not come out of the first annular groove 11 during the contact with the chamfer 102 and the internal thread 101, so as to avoid the annular elastic seal 40 coming out of the first annular groove 11 due to the too small contact area between the annular elastic seal 40 and the first annular groove 11, and then being unable to be placed in the accommodation cavity 30. The annular elastic seal 40 is held by the first annular groove 11 and the annular connecting portion 21, and is held by the second annular groove 210 and the pen barrel 10. Thus, the pen grip 20 and the pen barrel 10 are kept in a rotatable and coaxial connection state through the annular elastic seal 40, so that the pen barrel 10 can rotate and maintain the connection state with the pen grip 20.

[0039] The longitudinal sectional planes (i.e., the sectional planes along the Z-axis) of the first annular groove 11 and the second annular groove 210 can be rectangular, triangular or other shapes, preferably semi-circular. The first annular groove 11 and the second annular groove 210 with arc-shaped longitudinal sectional planes are more likely to be closely attached to the annular elastic seal 40. At the same time, the acting force exerted by the annular elastic seal 40 on the first annular groove 11 and the second annular groove 210 is more uniform, so as to ensure that the pen barrel 10 can rotate more smoothly when the pen barrel 10 and the pen grip 20 are connected.

[0040] It should be noted that the number of the accommodation cavities 30 is at least one. A plurality of first annular grooves 11 can be formed on the annular connecting portion 21, and a plurality of second annular grooves 210 can be formed at the corresponding positions on the inner side wall 105 of the pen barrel 10 opposite to the first annular grooves 11. Therefore, the pen barrel and pen grip combination member 100 can form a plurality of accommodation cavities 30 to accommodate a plurality of annular elastic seals 40, so that the connection between the pen barrel 10 and the pen grip 20 is more stable. Therefore, as long as the number of the accommodation cavities 30 can enable the pen barrel 10 to rotate while maintaining the connection state with the pen grip 20, it is within the protection scope of this application.

[0041] See Figure 4As shown, the internal thread 101 can further compress the annular elastic seal 40 located in the first annular groove 11, and can reduce the contact area between the inner wall 105 of the pen barrel 10 and the annular elastic seal 40, thereby reducing the frictional force between the annular elastic seal 40 and the inner wall 105 of the pen barrel 10. When the annular elastic seal 40 is in direct contact with the inner wall 105 of the pen barrel 10, it can prevent the annular elastic seal 40 from being disengaged from the first annular groove 11 due to excessive frictional force of the inner wall 105 of the pen barrel 10 on the annular elastic seal 40. In addition, during the screwing process of the pen barrel 10 onto the pen grip 20, the internal thread 101 continuously bites and compresses the annular elastic seal 40 to prevent the annular elastic seal 40 from being disengaged from the first annular groove 11. The internal thread 101 can be in the structure of a double-start trapezoidal thread or a rectangular thread, preferably a right-handed double-start trapezoidal thread. The double-start trapezoidal thread can bite with the annular elastic seal 40 during the screwing process of the pen barrel 10 onto the pen grip 20, but will not cause the annular elastic seal 40 to move in the screwing direction of the internal thread 101, resulting in the annular elastic seal 40 being disengaged from the first annular groove 11. At the same time, the double-start trapezoidal thread can reduce the wear on the annular elastic seal 40 when it comes into contact with the annular elastic seal 40.

[0042] As shown Figure 4 As shown, an inclined chamfer 102 is formed at the intersection of the inner wall 105 of the pen barrel 10 and the end face 103 of the pen barrel 10 facing the pen grip 20. The inclined chamfer 102 plays a guiding role in guiding the annular elastic seal 40 into the internal thread 101, and can compress the annular elastic seal 40 before the annular elastic seal 40 comes into contact with the internal thread 101, so that the annular elastic seal 40 is more easily compressed and bitten by the internal thread 101. If the annular elastic seal 40 is directly compressed, the compression rate of the annular elastic seal 40 may be too large, resulting in permanent deformation, and then the annular elastic seal 40 cannot exert a force on the first annular groove 11 and the second annular groove 210, ultimately causing the pen barrel 10 to be easily separated from the pen grip 20 during rotation. The inclined chamfer 102 is a slope facing the annular connecting portion 21, so it can gradually compress the annular elastic seal 40, causing the annular elastic seal 40 to gradually deform, thereby avoiding excessive compression rate of the annular elastic seal 40 and resulting in permanent deformation. When the pen barrel 10 is connected to the pen grip 20, if the angle between the inclined chamfer 102 and the horizontal plane (i.e., horizontal plane X) where the end face 103 of the pen barrel 10 facing the pen grip 20 is located is β, then 0° < β < 90°. When β is 0° or 90°, the inclined chamfer 102 cannot gradually compress the annular elastic seal 40, easily resulting in excessive compression rate of the annular elastic seal 40 and permanent deformation, and at this time, the inclined chamfer 102 cannot play a guiding role for the annular elastic seal 40.

[0043] As shown Figures 7 to 12As shown, during the screwing process of the pen barrel 10 onto the annular connecting part 21, the internal thread 101 and the chamfer 102 jointly press the annular elastic seal 40 so that the annular elastic seal 40 is received in the accommodating cavity 30. When the annular elastic seal 40 is received in the accommodating cavity 30, the annular elastic seal 40 simultaneously exerts a force generated by the restoration of its deformation on the first annular groove 11 and the second annular groove 210. During the process of the annular elastic seal 40 in the first annular groove 11 being pressed by the chamfer 102 and the internal thread 101, the annular elastic seal 40 exerts a force for restoring deformation on the first annular groove 11 due to being pressed, and at this time, the annular elastic seal 40 is pressed in the first annular groove 11. When the annular connecting part 21 is screwed into the pen barrel 10, the first annular groove 11 just moves to be opposite to the second annular groove 210. At this time, the annular elastic seal 40 is received in the accommodating cavity 30 jointly enclosed by the first annular groove 11, the second annular groove 210 and the internal thread 101. When the annular elastic seal 40 is received in the accommodating cavity 30, due to the pressing of the chamfer 102 and the internal thread 101, the annular elastic seal 40 simultaneously exerts a force on the first annular groove 11 and the second annular groove 210 due to the restoration of its deformation. Since the annular elastic seal 40 exerts a force on the first annular groove 11 and the second annular groove 210, the frictional force between the annular elastic seal 40 and the first annular groove 11 and the second annular groove 210 increases, and further the frictional force between the pen barrel 10 and the pen grip 20 increases. Therefore, when the pen barrel 10 rotates along the Z-axis, the pen barrel 10 and the pen grip 20 cannot be separated due to the increased frictional force. And since the pen barrel 10 rotates along the Z-axis and the annular elastic seal 40 is coaxial with the Z-axis when received in the accommodating cavity 30, it will not affect the rotation of the pen barrel 10 along the Z-axis, so that the pen barrel 10 can maintain its connection state with the pen barrel 10 during rotation. At the same time, due to the blocking effect of the annular elastic seal 40, the pen barrel 10 will not rotate without applying an external force.

[0044] It should be noted that by forming an accommodating cavity 30 enclosed by the first annular groove 11, the internal thread 101 and the second annular groove 210 between the pen barrel 10 and the pen grip 20, and receiving the annular elastic seal 40 in the accommodating cavity 30 to ensure that the pen barrel 10 can rotate while maintaining its connection state with the pen grip 20. This combined component can not only be applied to the connection structure between the pen barrel 10 and the pen grip 20, but also be applied to the connection structures of other tubular objects (not shown). Designs based on the same inventive concept are within the protection scope of this application.

[0045] See Figures 7 to 14As shown, in this embodiment, an ink storage tube 12 is built into the pen shaft 10. The platform 22 forms a boss 25 radially inward along the annular connecting portion 21. The boss 25 communicates with the pen grip 20 to form a through hole 23. The ink storage tube 12 is sleeved on the outer side wall of the boss 25 and communicates with the through hole 23. The ink storage tube 12 communicates with the pen grip 20 through the through hole 23, so that the ink in the ink storage tube 12 can be introduced to the nib 24 of the pen grip 20 for writing, and ink can also be sucked from the nib 24 of the pen grip 20 into the ink storage tube 12.

[0046] A piston 14 with a rectangular magnet 13 is built into the ink storage tube 12. A moving tube 16 with a traction piece 161 is sleeved outside the ink storage tube 12. The traction piece 161 generates an attractive force on the rectangular magnet 13 to drive the piston 14 to move longitudinally along the ink storage tube 12 (i.e., move along the Z-axis). The traction piece 161 is ferromagnetic. Therefore, by moving the moving tube 16 longitudinally along the ink storage tube 12, the traction piece 161 in the moving tube 16 moves longitudinally along the ink storage tube 12. Since the traction piece 161 is ferromagnetic, it can attract the piston 14 with the rectangular magnet 13 in the ink storage tube 12 to move longitudinally along the ink storage tube 12, thereby creating a negative pressure in the ink storage tube 12 to suck ink.

[0047] See Figure 11 and Figure 14As shown, the pen shaft 10 forms a first thread 104 facing the moving tube 16, and the moving tube 16 forms a second thread 160 facing the pen shaft 10. The first thread 104 engages with the second thread 160. When the pen shaft 10 rotates, the first thread 104 engages with the second thread 160 to drive the moving tube 16 to move longitudinally along the ink storage tube 12 (i.e., move along the Z-axis). Before ink absorption, rotate the pen shaft 10 counterclockwise. Then, the first thread 104 of the pen shaft 10 drives the second thread 160 on the moving tube 16 that engages with the first thread 104 to move downward. As a result, the moving tube 16 moves downward. When the moving tube 16 moves downward, the traction piece 161 inside the moving tube 16 moves downward accordingly. Since the traction piece 161 is ferromagnetic, the downward movement of the traction piece 161 drives the downward movement of the rectangular magnet 13 in the ink storage tube 12. The downward movement of the rectangular magnet 13 drives the piston 14 to move downward. When the moving tube 16 moves to contact the annular connecting portion 21, the pen shaft 10 cannot continue to rotate counterclockwise, and the moving tube 16 stops moving downward. At this time, the piston 14 moves downward to above the through hole 23. When absorbing ink, insert the nib 24 of the pen grip 20 into the ink, and rotate the pen shaft 10 clockwise. Then, the first thread 104 of the pen shaft 10 drives the second thread 160 on the moving tube 16 that engages with the first thread 104 to move upward. As a result, the moving tube 16 moves upward. When the moving tube 16 moves upward, the traction piece 161 inside the moving tube 16 moves upward accordingly. Since the traction piece 161 is ferromagnetic, the upward movement of the traction piece 161 drives the upward movement of the rectangular magnet 13 in the ink storage tube 12. The upward movement of the rectangular magnet 13 drives the piston 14 to move upward. The upward movement of the piston 14 generates a negative pressure in the ink storage tube 12, thereby sucking the ink into the ink storage tube 12 through the nib 24 and the through hole 23. As the piston 14 moves upward, the ink is also sucked into the ink storage tube 12. Therefore, in this embodiment, it is necessary to rotate the pen shaft 10 clockwise or counterclockwise to absorb ink. At this time, the pen shaft 10 and the pen grip 20 need to remain connected all the time to enable the ink storage tube 12 to absorb ink smoothly. Thus, due to the blocking effect of the annular elastic seal 40, the pen shaft 10 can always remain connected to the pen grip 20 during the rotation process.

[0048] See Figures 7 to 12As shown, the annular elastic seal 40 is held in the first annular groove 11. During the clockwise screwing connection of the pen barrel 10 to the pen grip 20, the chamfer 102 of the pen barrel 10 first contacts the annular elastic seal 40, guiding the contact between the annular elastic seal 40 and the internal thread 101. At the same time, the chamfer 102 gradually compresses the annular elastic seal 40, causing elastic deformation of the annular elastic seal 40. When the annular elastic seal 40 contacts the internal thread 101, the internal thread 101 further compresses the annular elastic seal 40 and engages with the annular elastic seal 40 to prevent the annular elastic seal 40 from coming out of the first annular groove 11. During the clockwise rotation of the pen barrel 10, the internal thread 101 can drag the annular elastic seal 40 into the accommodation cavity 30 more smoothly. When the end face 103 of the pen barrel 10 with the chamfer 102 abuts against the platform 22 of the pen grip 20, the screwing connection between the pen barrel 10 and the pen grip 20 ends. At this time, the annular elastic seal 40 is exactly located in the accommodation cavity 30 formed by the first annular groove 11, the internal thread 101, and the second annular groove 210, and the annular elastic seal 40 has undergone elastic deformation under the compression of the chamfer 102 and the internal thread 101. When the annular elastic seal 40 is located in the accommodation cavity 30, the annular elastic seal 40 is in a state of restoring deformation. When the annular elastic seal 40 restores deformation, it will exert a force generated by restoring elastic deformation on the first annular groove 11 and the second annular groove 210. Due to the force exerted by the annular elastic seal 40, the frictional force between the first annular groove 11 and the second annular groove 210 and the annular elastic seal 40 increases. Therefore, when the pen barrel 10 rotates to absorb ink, the pen barrel 10 and the pen grip 20 cannot be separated. When the pen barrel 10 rotates along the Z-axis, through the engagement of the first thread 104 and the second thread 160, the moving tube 16 moves longitudinally. The longitudinal movement of the moving tube 16 drives the piston 14 with the rectangular magnet 13 in the ink storage tube 12 to move longitudinally, thereby sucking ink. During the process of the pen barrel 10 rotating to absorb ink, due to the blocking effect of the annular elastic seal 40, the end face 103 of the pen barrel 10 with the chamfer 102 always abuts against the platform 22 of the pen grip 20. Therefore, the pen barrel 10 always maintains a connected state with the pen grip 20.

[0049] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation modes or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

[0050] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, 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 embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0051] In addition, it should be understood that although this specification is described in terms of 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 pen barrel and pen grip combination member, characterized in that Comprising: A pen shaft, and a pen grip rotatably and coaxially connected to the pen shaft. An ink storage tube is built into the pen shaft. The ink storage tube communicates with the pen grip through a through hole. A piston with a rectangular magnet is built into the ink storage tube. A moving tube with a traction piece built in is sleeved outside the ink storage tube. The traction piece is ferromagnetic. The pen shaft forms a first thread facing the moving tube, and the moving tube forms a second thread facing the pen shaft; The pen grip includes a platform abutting against the pen shaft. An annular connecting portion protrudes from one side of the platform facing the pen shaft. The annular connecting portion is axially movably screwed into the pen shaft; The outer wall surface of the annular connecting portion facing the pen shaft is smooth and forms a first annular groove. The inner wall of the pen shaft facing the first annular groove forms a second annular groove. The inner wall of the pen shaft facing the annular connecting portion forms an internal thread; The first annular groove, the second annular groove and the internal thread jointly enclose a receiving cavity for accommodating an annular elastic seal in a state not pressed by the internal thread; During the rotation of the pen shaft, the end face of the pen shaft facing the pen grip always abuts against the platform.

2. The pen barrel and pen grip combination member according to claim 1, characterized in that, An inclined chamfer is formed at the intersection of the inner side wall of the pen shaft and the end face of the pen shaft facing the pen grip. The included angle between the inclined chamfer and the horizontal plane where the end face is located is β, and 0° < β < 90°.

3. The pen barrel and pen grip combination member according to claim 2, characterized in that, During the screwing process of the pen shaft onto the annular connecting portion, the inclined chamfer and the internal thread jointly press the annular elastic seal, so that the annular elastic seal is accommodated in the receiving cavity.

4. The pen barrel and pen grip combination member according to claim 3, characterized in that, The contact area between the first annular groove and the annular elastic seal is greater than or equal to the contact area between the second annular groove and the annular elastic seal. The annular elastic seal is held by the annular connecting portion through the first annular groove.

5. The pen shaft and pen grip combination member according to claim 4, characterized in that When the annular elastic seal is accommodated in the receiving cavity, the annular elastic seal simultaneously exerts a force generated by the restoration of the deformation of the annular elastic seal on the first annular groove and the second annular groove; When the annular elastic seal is not accommodated in the receiving cavity, the annular elastic seal only exerts a force generated by the restoration of the deformation of the annular elastic seal on the first annular groove.

6. The pen barrel and pen grip combination member according to claim 1, wherein, The number of the receiving cavities is at least one.

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