Automatic fountain pen

Abstract

The application relates to the field of automatic fountain pens, and particularly provides an automatic fountain pen which comprises a cylindrical pen barrel, a plurality of first bosses arranged at intervals are arranged on the inner wall of the pen barrel, a pressing rod is slidably arranged in the pen barrel, the top of a pen core is inserted into the pressing rod, a ball is arranged in a containing hole, the ball is partially exposed outside the pen barrel and partially exposed inside the pen barrel, a C-shaped sleeve ring is arranged on the pen barrel and located in a second containing groove, and the inner wall of the C-shaped sleeve ring abuts against the ball. When falling, the force on the pen tip will make the pressing rod bear upward force, at this time, the ball will move outward and open the C-shaped sleeve ring, so that the pressing rod can move upward and the pen tip can be recovered into the pen barrel, so that the pen tip is not damaged; when writing, the hand holding part is located at the C-shaped sleeve ring, the ball can be given inward force, the pressing rod cannot move upward, and normal writing can be ensured. In this way, the service life of the automatic fountain pen can be prolonged, and damage can be avoided.

Description

Technical Field

[0001] This invention relates to automatic fountain pens, and specifically provides an automatic fountain pen. Background Technology

[0002] Automatic ballpoint pens with springs are popular because the tip retracts into the barrel when not in use, and the tip can be protected without a cap.

[0003] However, during use, it is inevitable that the pen will fall to the ground, especially when the nib hits the ground. If the nib is subjected to a strong impact, it will be damaged, causing the automatic fountain pen to become unusable and requiring the replacement of the refill, resulting in higher usage costs.

[0004] Therefore, there is an urgent need for an automatic ballpoint pen to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the tip of the existing automatic ballpoint pen is easily damaged when it is dropped.

[0006] In a first aspect, the present invention provides an automatic ballpoint pen, comprising:

[0007] A cylindrical pen barrel, wherein a plurality of spaced first protrusions are provided on the inner wall of the pen barrel;

[0008] The pressing rod is slidably disposed inside the pen barrel, and the top of the pen refill is inserted into the pressing rod; the side wall of the pressing rod is provided with a plurality of vertically arranged strip grooves, and the first boss is at least partially slidably disposed in the strip grooves;

[0009] The bottom end of the pressing rod is provided with a first receiving groove, which is located below the strip groove. The top surface of the first receiving groove is provided with a plurality of first concave grooves at intervals.

[0010] A pressing collar is sleeved on the pressing rod and located in the first receiving groove. The top surface of the pressing collar has a first convex tooth that corresponds one-to-one with the first concave groove.

[0011] The pen barrel is provided with a second receiving groove, which is located below the second boss. The bottom wall of the second receiving groove is provided with a plurality of receiving holes.

[0012] A ball bearing is provided in the receiving hole, with part of the ball bearing protruding outward from the pen barrel and part of it protruding inward from the pen barrel;

[0013] A C-shaped collar is fitted onto the pen barrel and located within the second receiving groove, with the inner wall of the C-shaped collar abutting against the ball bearing.

[0014] Pressing the pressing rod causes the ball to move upward along the outer side wall of the bottom end of the pressing rod and move to below the pressing collar and into the first receiving groove, so that the pen refill is exposed outside the pen barrel for writing.

[0015] During the pressing process, the first convex tooth is embedded in the first concave groove.

[0016] Preferably, the automatic ballpoint pen further includes a rubber sleeve, which is fitted onto the pen barrel and the C-shaped collar, and the ball portion is embedded in the first receiving groove under the action of the rubber sleeve and the C-shaped collar.

[0017] Preferably, the inner wall of the pen barrel is provided with a plurality of second protrusions arranged at intervals, the first protrusions and the second protrusions are arranged in a one-to-one correspondence, the second protrusions are located below the first protrusions, and the two are arranged at intervals;

[0018] The outer surface of the top of the pressing collar is provided with a plurality of third protrusions spaced apart. The lower surface of the third protrusion is serrated, and the gap between two adjacent third protrusions is located below the first convex tooth.

[0019] The third protrusion has a first inclined surface and a second inclined surface from the first end to the second end, respectively.

[0020] The top of the second protrusion is provided with a third inclined surface, and the third inclined surface has the same inclination direction as the second inclined surface;

[0021] During the pressing process, the second inclined surface can contact the third inclined surface, and the pressing collar can rotate relative to the pen barrel so that the second boss moves to the first end of the second inclined surface.

[0022] Preferably, the first concave groove has a fourth inclined surface and a fifth inclined surface from the first end to the second end, and a second concave groove is provided on the fifth inclined surface.

[0023] Pressing the pressing rod again causes the tip of the first convex tooth to gradually move into the second concave groove, and the second boss to move below the first inclined surface. It also allows the second boss to move between two adjacent third bosses, so that the pressing rod can move downward and cause the pen refill and the pressing rod to spring back.

[0024] Preferably, the bottom end of the first boss is a downward protruding point, and the top surface of the third boss is an upward protruding point. During the rebound process, the first boss can reset the pressing collar.

[0025] Preferably, the outer surface of the pressing collar is provided with an annular groove, so that when pressed and rebounding, the ball can move into the annular groove, and then the ball moves downward along the side wall of the pressing collar and the pressing rod.

[0026] Preferably, the outer side of the bottom end of the pressing rod is chamfered.

[0027] Preferably, the pen also includes a spring, which is sleeved on the bottom end of the pen refill and abuts against the pen barrel. The spring can drive the pressing rod and the pressing collar to rebound.

[0028] When adopting the above technical solution, the automatic fountain pen of the present invention includes: a cylindrical pen barrel, with a plurality of spaced-apart first protrusions arranged circumferentially on the inner wall of the pen barrel; a pressing rod, which is slidably disposed inside the pen barrel, with the top of the pen refill inserted into the pressing rod; a plurality of vertically arranged strip grooves are provided on the side wall of the pressing rod, with the first protrusions at least partially slidably disposed in the strip grooves; a first receiving groove is provided circumferentially at the bottom end of the pressing rod, the first receiving groove being located below the strip grooves, and a plurality of spaced-apart first concave grooves are provided circumferentially on the top surface of the first receiving groove; a pressing collar is sleeved on the pressing rod and located in the first receiving groove, with the top surface of the pressing collar protruding upwards and corresponding to the first concave grooves. A first convex tooth is provided in a corresponding configuration; a second receiving groove is provided on the upper ring of the pen barrel, the second receiving groove is located below the second boss, and multiple receiving holes are provided on the bottom wall of the second receiving groove; a ball bearing is provided in the receiving hole, the ball bearing is partially exposed outward and partially exposed inward of the pen barrel; a C-shaped collar is fitted onto the pen barrel and located in the second receiving groove, the inner wall of the C-shaped collar abuts against the ball bearing; pressing the pressing rod can move the ball bearing upward along the outer wall of the bottom end of the pressing rod and move it to below the pressing collar and located in the first receiving groove, and then the pen refill is exposed on the pen barrel for writing; during the pressing process, the first convex tooth is embedded in the first concave groove.

[0029] When dropped, the force applied to the pen tip creates an upward force on the pressing lever, causing the ball bearing to move outward and opening the C-shaped collar. This allows the pressing lever to move upward and retracts the pen tip back into the pen barrel, preventing damage to the tip. Furthermore, during writing, the grip area located at the C-shaped collar provides an inward force to the ball bearing, preventing the pressing lever from moving upward and ensuring normal writing. This design extends the lifespan of the automatic fountain pen and prevents damage. Attached Figure Description

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0031] Figure 1 This is a schematic diagram of the structure of the automatic ballpoint pen provided by the present invention;

[0032] Figure 2This is a cross-sectional view of the automatic ballpoint pen provided by the present invention;

[0033] Figure 3 This is a partial cross-sectional view of the automatic ballpoint pen provided by the present invention;

[0034] Figure 4 This is a partial structural schematic diagram of the pen barrel provided by the present invention;

[0035] Figure 5 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 1 ;

[0036] Figure 6 This is a schematic diagram of the structure of the third boss and the first boss cooperating, provided by the present invention;

[0037] Figure 7 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 1 ;

[0038] Figure 8 This is a schematic diagram of the structure provided by the present invention, showing the cooperation between the third boss and the second boss. Figure 1 ;

[0039] Figure 9 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 2 ;

[0040] Figure 10 This is a schematic diagram of the structure provided by the present invention, showing the cooperation between the third boss and the second boss. Figure 2 ;

[0041] Figure 11 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 3 ;

[0042] Figure 12 This is a schematic diagram of the structure provided by the present invention, showing the cooperation between the third boss and the second boss. Figure 3 ;

[0043] Figure 13 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 4 ;

[0044] Figure 14 This is a schematic diagram of the structure provided by the present invention, showing the cooperation between the third boss and the second boss. Figure 4 ;

[0045] Figure 15 This is a partial structural diagram of the automatic ballpoint pen provided by the present invention. Figure 5 ;

[0046] Figure 16 This is a schematic diagram of the structure provided by the present invention, showing the cooperation between the third boss and the second boss. Figure 5 .

[0047] List of reference numerals in the attached diagram:

[0048] 1. Pen barrel; 11. First boss; 12. Second boss; 13. Receiving hole; 2. Pressing rod; 21. Strip groove; 22. First receiving groove; 23. First concave groove; 24. Second concave groove; 3. Pressing collar; 31. First convex tooth; 32. Third boss; 321. First inclined surface; 322. Second inclined surface; 33. Annular groove; 4. C-shaped collar; 5. Ball bearing; 6. Rubber sleeve; 7. Spring; 8. Pen refill. Detailed Implementation

[0049] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0050] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] like Figure 1-16 As shown, this embodiment discloses an automatic ballpoint pen, which includes a pen barrel 1, a pressing rod 2, a pressing collar 3, a C-shaped collar 4, a pen refill 8, a rubber sleeve 6, and a spring 7.

[0053] The pen barrel 1 is cylindrical, specifically comprising a first rod section and a second rod section, wherein the first rod section and the second rod section are threadedly connected, and the second rod section includes a tip, through which the pen refill 8 can extend outward. A spring 7 is fitted onto the pen refill 8, with its two ends abutting against the abutting part of the pen refill 8 and the second rod section, respectively. The spring 7 mainly serves to cause the pen refill 8 to spring back.

[0054] The inner wall of the pen barrel 1 is provided with a plurality of spaced-apart first protrusions 11 and a plurality of spaced-apart second protrusions 12. The first protrusions 11 and second protrusions 12 are arranged in a one-to-one correspondence, with the second protrusions 12 located below the first protrusions 11 and spaced apart. Both the first protrusions 11 and the second protrusions 12 are elongated strips, arranged along the length of the pen barrel 1. The bottom end of the first protrusion 11 is a downwardly protruding point.

[0055] The pressing lever 2 is slidably disposed inside the pen barrel 1. Specifically, the pressing lever 2 is hollow, and the top of the pen refill 8 is inserted into the pressing lever 2. Multiple vertically arranged strip grooves 21 are provided on the side wall of the pressing lever 2. The first protrusion 11 is at least partially slidably disposed in the strip groove 21. During the pressing process, the first protrusion 11 can slide in the strip groove 21. The strip groove 21 and the first protrusion 11 activate a limiting function, preventing the pressing lever 2 from rotating.

[0056] The bottom end of the pressing rod 2 is provided with a first receiving groove 22, which is located below the strip groove 21. Multiple first concave grooves 23 are spaced apart on the top surface of the first receiving groove 22. A pressing sleeve 3 is fitted onto the pressing rod 2 and located within the first receiving groove 22. The top surface of the pressing sleeve 3 has upwardly protruding first convex teeth 31 corresponding to the first concave grooves 23. The first concave grooves 23 have a fourth inclined surface and a fifth inclined surface from the first end to the second end, respectively. A second concave groove 24 is provided on the fifth inclined surface. The angle between the fourth inclined surface and the vertical plane is smaller than the angle between the second inclined surface 22 and the vertical plane; that is, the fourth inclined surface is steeper, and the fifth inclined surface is gentler. The second concave groove 24 matches the top end of the first convex teeth 31, allowing the first convex teeth 31 to extend into the second concave groove 24.

[0057] The pen barrel 1 has a second receiving groove on its upper ring, located below the second boss 12. Multiple receiving holes 13 are provided on the bottom wall of the second receiving groove. A ball bearing 5 is installed inside each receiving hole 13, with part of the ball bearing 5 protruding outwards and part protruding inwards from the pen barrel 1. A C-shaped collar 4 is fitted onto the pen barrel 1 and located within the second receiving groove, with its inner wall abutting against the ball bearing 5. A rubber sleeve 6 is fitted onto the pen barrel 1 and the C-shaped collar 4. Under the action of the rubber sleeve 6 and the C-shaped collar 4, part of the ball bearing 5 is embedded in the first receiving groove 22.

[0058] Multiple third protrusions 32 are spaced apart on the outer surface of the top of the pressing collar 3. The lower surface of the third protrusion 32 is serrated, and the gap between two adjacent third protrusions 32 is located below the first convex tooth 31.

[0059] The third protrusion 32 has a first inclined surface 321 and a second inclined surface 322 from the first end to the second end. The top of the second protrusion 12 is provided with a third inclined surface, and the third inclined surface has the same inclination direction as the second inclined surface 322.

[0060] The outer surface of the pressing collar 3 is provided with an annular groove 33. When the pressing rebounds, the ball 5 can move into the annular groove 33, and then the ball 5 moves downward along the side wall of the pressing collar 3 and the pressing rod 2.

[0061] When the pen tip is retracted into the pen barrel 1, that is, in the initial state, the first convex tooth 31 and the first concave groove 23 are directly opposite each other, the second boss 12 is located below the third boss 32, and the third boss 32 can move downward so that the third inclined surface can contact the second inclined surface 322.

[0062] like Figure 5 As shown, during the pressing process (this process is carried out in the initial state), the pressing rod 2 is pressed down, which causes the ball 5 to move upward along the outer side wall of the bottom end of the pressing rod 2 and move to below the pressing collar 3 and into the first receiving groove 22, so that the pen refill 8 is exposed outside the pen barrel 1 for writing.

[0063] During the pressing process, such as Figure 5-10 As shown, the first convex tooth 31 is embedded in the first concave groove 23; the pressing rod 2 can drive the pressing collar 3 to move downward, so that the second inclined surface 322 can contact the third inclined surface, and the pressing collar 3 can rotate relative to the pen barrel 1, so that the second boss 12 moves to the second end of the second inclined surface 322, as shown in the figure. Figure 8 After the second boss 12 moves to the first end of the second inclined surface 322 (see details...), Figure 10 The longest part of the pen tip is exposed outwards. During this process, the first convex tooth 31 will move to the second concave groove 24 so that the pen refill 8 can be retracted after pressing again.

[0064] like Figure 11 and 12 As shown, after the pressing lever 2 is released, the pen refill 8, the pressing lever 2, and the pressing collar 3 all have a small amount of rebound under the action of the spring 7. After rebounding, the first inclined surface 321 of the pressing collar 3 is located above the third protrusion 32, so that when pressed again, the first inclined surface 321 can contact the third inclined surface.

[0065] During the re-pressing process (this process is performed in writing mode), such as Figure 11-14 As shown, the pressing rod 2 can gradually move the tip of the first convex tooth 31 into the second concave groove 24 and engage with it. Furthermore, the first inclined surface 321 can contact the third inclined surface. Then, the pressing collar 3 rotates, causing the second boss 12 to move between two adjacent third bosses 32, allowing the pressing rod 2 to move downwards and causing the pen refill 8 and the pressing rod 2 to spring back. During the rotation of the pressing collar 3, it can engage with the second concave groove 24 and disengage from it.

[0066] There is a planar portion between two adjacent second concave grooves 24. During the re-pressing process, after the first convex tooth 31 disengages from the second concave groove 24, the tip of the first convex tooth 31 will abut against the planar portion (see details). Figure 13 ), and the specific final grounding part is located on the side closer to the second end.

[0067] The top surface of the third protrusion 32 is a pointed shape that protrudes upwards. During the re-pressing process, after the pen lead 8 has extended to its maximum extent, it rebounds under the action of the spring 7 (see details). Figure 15 During the rebound process, the first boss 11 enables the pressing collar 3 to return to its original position. Specifically, the inclined surface of the second end of the first boss 11 contacts the inclined surface of the first end of the third boss 32, causing the pressing collar 3 to rotate from the first end to the second end, so that the first convex tooth 31 is located directly below the first concave groove 23 (see details). Figure 16 This allows the pressing collar 3 to return to its initial position for the next writing press.

[0068] In addition, such as Figure 13 and 15 As shown, during the re-pressing process, the pressing element drives the pressing collar 3 downward, causing the ball 5 to move upward relative to the pressing collar 3, allowing it to move into the annular groove 33. At this time, the bottom surface of the pressing collar 3 is in contact with the side wall of the bottom of the first receiving groove 22. Upon rebound, the ball 5 moves along the outer side wall of the pressing collar 3 and the side wall of the bottom end of the pressing rod 2 to below the pressing rod 2, and the pen refill 8 is retracted into the pen barrel 1.

[0069] The outer side of the bottom end of the pressing rod 2 is chamfered, which serves as a guide and allows the ball bearing 5 to move upward relative to the pressing rod 2 along the side wall of the pressing rod 2.

[0070] With the pen tip exposed, if the automatic pen is accidentally dropped and the tip experiences significant force, the pressing lever 2 moves upward. This causes the ball bearing 5 to exert an outward force on the outer C-shaped collar 4 and the rubber sleeve 6, moving the ball bearing 5 outward. This allows the pressing lever 2 to move smoothly upward, and the ball bearing 5 moves along the side wall at the bottom of the pressing lever 2 to below it. This also causes the pen refill 8 to retract into the pen barrel 1. This ensures that the pen tip is not subjected to excessive force, thus preventing damage to the pen tip.

[0071] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An automatic ballpoint pen, characterized in that, It includes: A cylindrical pen barrel (1) has a plurality of spaced first protrusions (11) arranged around the inner wall of the pen barrel (1); a plurality of spaced second protrusions (12) are arranged around the inner wall of the pen barrel (1), the first protrusions (11) and the second protrusions (12) are arranged in a one-to-one correspondence, the second protrusions (12) are located below the first protrusions (11), and the two are spaced apart; The pressing rod (2) is slidably disposed inside the pen barrel (1), and the top of the pen refill (8) is inserted into the pressing rod (2); the side wall of the pressing rod (2) is provided with a plurality of vertically arranged strip grooves (21), and the first boss (11) is at least partially slidably disposed in the strip grooves (21); The bottom end of the pressing rod (2) is provided with a first receiving groove (22), which is located below the strip groove (21). The top surface of the first receiving groove (22) is provided with a plurality of first concave grooves (23) at intervals. The first concave groove (23) has a fourth inclined surface and a fifth inclined surface from the first end to the second end, and a second concave groove (24) is provided on the fifth inclined surface. The pressing collar (3) is sleeved on the pressing rod (2) and located in the first receiving groove (22). The top surface of the pressing collar (3) is provided with a first convex tooth (31) that corresponds one-to-one with the first concave groove (23). The pen barrel (1) is provided with a second receiving groove on the upper ring. The second receiving groove is located below the second boss (12). The bottom wall of the second receiving groove is provided with a plurality of receiving holes (13). The ball (5) is provided in the receiving hole (13). The ball (5) is partially exposed outward from the pen barrel (1) and partially exposed inward from the pen barrel (1). A C-shaped collar (4) is fitted onto the pen barrel (1) and located in the second receiving groove. The inner wall of the C-shaped collar (4) abuts against the ball (5). Pressing the pressing rod (2) causes the ball (5) to move upward along the outer side wall of the bottom end of the pressing rod (2) and move to below the pressing collar (3) and into the first receiving groove (22), and then the pen refill (8) is exposed outside the pen barrel (1) for writing; The outer surface of the top of the pressing collar (3) is provided with a plurality of third protrusions (32) spaced apart. The lower surface of the third protrusions (32) is serrated, and the gap between two adjacent third protrusions (32) is located below the first convex tooth (31). The third protrusion (32) has a first inclined surface (321) and a second inclined surface (322) from the first end to the second end. The top of the second protrusion (12) is provided with a third inclined surface, and the third inclined surface has the same inclination direction as the second inclined surface (322); During the pressing process, the second inclined surface (322) can contact the third inclined surface, and the pressing collar (3) can rotate relative to the pen barrel (1) so that the second boss (12) moves to the first end of the second inclined surface (322); During the pressing process, the first convex tooth (31) is embedded in the first concave groove (23); During the pressing process, the pressing rod (2) can gradually move the top of the first convex tooth (31) into the second concave groove (24), and the second boss (12) moves to the bottom of the first inclined surface (321), and can move the second boss (12) between two adjacent third bosses (32), so that the pressing rod (2) can move downward and cause the pen refill (8) and the pressing rod (2) to rebound.

2. The automatic ballpoint pen according to claim 1, characterized in that, The automatic pen also includes a rubber sleeve (6), which is fitted onto the pen barrel (1) and the C-shaped collar (4). Under the action of the rubber sleeve (6) and the C-shaped collar (4), the ball (5) is partially embedded in the first receiving groove (22).

3. The automatic ballpoint pen according to claim 2, characterized in that, The bottom end of the first boss (11) is a downward protruding point, and the top surface of the third boss (32) is an upward protruding point. During the rebound process, the first boss (11) can reset the pressing collar (3).

4. The automatic ballpoint pen according to claim 3, characterized in that, The outer surface of the pressing collar (3) is provided with an annular groove (33). When the pressing rebounds, the ball (5) can move into the annular groove (33) and then the ball (5) moves downward along the side wall of the pressing collar (3) and the pressing rod (2).

5. The automatic ballpoint pen according to claim 1, characterized in that, The outer side of the bottom end of the pressing rod (2) is chamfered.

6. The automatic ballpoint pen according to claim 1, characterized in that, It also includes a spring (7) which is sleeved on the bottom end of the pen refill (8) and the bottom end of the spring (7) abuts against the pen barrel (1). The spring (7) can drive the pressing rod (2) and the pressing collar (3) to rebound.

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