Adjustable ballpoint pen with adjustable center of gravity

Abstract

The utility model relates to a kind of gravity center position adjustable pen, including pen holder, counterweight that is sleeved in the outside of pen holder and can slide back and forth along the axis direction of the front end and rear end of pen holder and adjusting member rotatably sleeved in the outside of pen holder and can rotate around axis A, the adjusting member is set in the rear of counterweight, further include the elastic member of rear end abutment in the front end of counterweight, it can provide rear force under pressure state to drive counterweight reset, sliding member is set between pen holder and adjusting member, the front end of sliding member abutment on the rear end of counterweight, sliding member is configured with pen holder dynamic cooperation, to drive counterweight forward movement.The utility model by setting sliding member and elastic member in pen, can make adjusting member forward rotation when realize gravity center forward movement and reverse rotation gravity center rear movement, counterweight resets under the restoring force of elastic member when gravity center rear movement, adjustment is convenient and can satisfy the use demand of user.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, specifically to a pen with an adjustable center of gravity. Background Technology

[0002] Currently, pens have become an indispensable stationery item in daily life. Traditionally designed pens have a fixed center of gravity, usually located near the nib (the tip of the pen). However, different users have different writing needs depending on the usage scenario. For example, when taking shorthand, shifting the pen's center of gravity backward facilitates faster movement; when drawing, a center of gravity closer to the nib enhances the nib's stability. Traditional pens can no longer meet users' needs.

[0003] For example, Chinese utility model patent CN222451778U, "An Adjustable Pen for Center of Gravity Position," discloses a pen that includes a pen barrel, a counterweight, and an adjusting ring. The counterweight is slidably mounted on the pen barrel, and the adjusting ring is rotatably mounted on the pen barrel. A transmission mechanism is provided between the adjusting ring and the counterweight. This transmission mechanism includes a rotating rod and a gear combination mechanism. The four gears of the gear combination mechanism are equidistant and rotatably mounted on the pen barrel. During the adjustment of the center of gravity, rotating the adjusting ring drives the gears to rotate in the same direction. The gears drive the rotating rod to rotate, which in turn drives the counterweight to move.

[0004] However, the pen structure disclosed in the above-mentioned utility model patent has shortcomings: due to the small spacing between adjacent threaded sections on the rotating rod, when the counterweight moves a long distance, the process of adjusting the counterweight forward and resetting the counterweight requires rotating the adjusting ring multiple times. The adjustment process is relatively slow, time-consuming, and laborious, which is somewhat inconvenient.

[0005] Therefore, further improvements are needed to the structure of the pen with an adjustable center of gravity. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a pen with an adjustable center of gravity that is easy to adjust and can meet the user's needs, in light of the above-mentioned existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the pen with adjustable center of gravity includes:

[0008] pen;

[0009] A counterweight is fitted on the outside of the pen barrel, and the counterweight can slide back and forth along the axis A formed by the front and rear ends of the pen barrel.

[0010] An adjusting element is rotatably fitted onto the outside of the pen barrel and positioned behind the counterweight. This adjusting element can rotate about axis A of the pen barrel.

[0011] Its characteristic is that it also includes:

[0012] An elastic element is sleeved on the outside of the pen barrel. The rear end of the elastic element abuts against the front end of the counterweight and can provide a backward restoring force under pressure to drive the counterweight to reset.

[0013] A slider is movably disposed between the pen barrel and the adjusting member, the front end of the slider abutting against the rear end of the counterweight; wherein the slider is configured to dynamically cooperate with the pen barrel to drive the counterweight forward.

[0014] To achieve dynamic coordination, preferably, the outer circumferential surface of the pen barrel is provided with a rotating groove, and the inner circumferential surface of the slider is provided with a protrusion that matches the rotating groove. The protrusion can slide along the rotating groove, thereby driving the counterweight forward. The rotating adjustment component drives the slider to rotate synchronously, at which point the protrusion of the slider can slide along the rotating groove and move forward, driving the counterweight forward synchronously during the forward movement.

[0015] For ease of adjustment, preferably, both the rotating groove and the protrusion are spirally distributed. The protrusion and the rotating groove can cooperate with each other, and their special spiral design converts rotational motion into axial motion, enabling continuous fine-tuning of the center of gravity. Furthermore, compared to straight grooves which require additional locking or damping structures, the spiral rotating groove utilizes inclined surface friction to resist accidental slippage of the counterweight, thereby improving its stability.

[0016] To improve adjustment accuracy, preferably, the rotating groove has at least two turns. By using multiple turns of the rotating groove, the rotation path can be extended. In this case, moving a unit distance axially requires a larger rotation angle, thus allowing for more precise fine-tuning.

[0017] To maintain synchronized movement, preferably, the outer circumferential surface of the slider is provided with a protrusion, and the inner circumferential surface of the adjusting member is provided with a mounting groove for inserting the protrusion. When the user rotates the adjusting member, because the protrusion of the slider is inserted into the mounting groove of the adjusting member, the slider can rotate synchronously under the action of the adjusting member.

[0018] To ensure uniform force distribution, the slider is preferably T-shaped, with two symmetrically arranged protrusions on its outer circumferential surface near the upper end. These symmetrical protrusions distribute the rotational torque of the adjusting component evenly to both sides, preventing uneven wear or jamming due to unilateral force, thus enhancing the overall stability of the slider.

[0019] To avoid noise, preferably, a separator is fitted on the outer side of the pen barrel, positioned between the front end of the counterweight and the rear end of the elastic element. The counterweight will directly contact the elastic element during forward movement, which could easily cause noise due to collision. The separator prevents direct contact between the two.

[0020] To prevent slippage, preferably, the outer peripheral surface of the adjusting member is provided with at least two anti-slip parts. By providing multiple anti-slip parts, the friction between the fingers and the surface of the adjusting member is increased, thereby preventing slippage caused by hand sweat, oil stains, or insufficient grip strength.

[0021] To improve the anti-slip effect, preferably, each of the anti-slip parts extends along the axis A of the pen barrel and is arranged at intervals in the circumferential direction. During writing, the fingers mainly move along the axis of the pen barrel. By extending the anti-slip parts along the axis A of the pen barrel, better friction in the front-to-back direction can be provided. The spaced arrangement of the anti-slip parts can accommodate various pen-holding postures of the user.

[0022] Compared with the prior art, the advantages of this utility model are as follows: by setting a slider and an elastic element inside the pen, when the adjustment element rotates in the forward direction, the slider drives the counterweight to move forward, thereby shifting the center of gravity forward; when the adjustment element rotates in the reverse direction, it drives the slider to move backward, and the counterweight moves the center of gravity backward under the restoring force of the elastic element. This process is convenient to adjust and can meet the user's needs. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0024] Figure 2 This is an exploded structural diagram of an embodiment of the present utility model;

[0025] Figure 3 This is a longitudinal cross-sectional view of the counterweight block in a high center of gravity state according to an embodiment of the present invention.

[0026] Figure 4 This is a longitudinal cross-sectional view of the counterweight block in a low center of gravity state according to an embodiment of the present invention.

[0027] Figure 5 This is a longitudinal sectional view of the sliding member in an embodiment of the present utility model;

[0028] Figure 6 This is a longitudinal sectional view of the pen barrel in an embodiment of the present invention.

[0029] Figure 7 This is a longitudinal sectional view of the adjusting member in an embodiment of the present invention.

[0030] In the diagram: 1. Pen barrel; 11. Rotating groove; 2. Counterweight; 3. Adjusting component; 31. Mounting groove; 32. Anti-slip part; 4. Elastic component; 5. Sliding component; 51. Protrusion; 52. Protruding column; 6. Separator. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 7 The diagram shows the preferred embodiment of this utility model. The adjustable pen includes a pen barrel 1, a counterweight 2 that is sleeved on the outside of the pen barrel 1 and can slide back and forth along the axis A formed by the front and rear ends of the pen barrel 1, and an adjusting member 3 that is rotatably sleeved on the outside of the pen barrel 1 and can rotate around the axis A of the pen barrel 1. The adjusting member 3 is located behind the counterweight 2. It also includes an elastic member 4 sleeved on the outside of the pen barrel 1. The elastic member 4 can be designed in various forms, such as a spring or a spring sheet. In this embodiment, a spring that is easy to install is preferred. The rear end of the spring abuts against the front end of the counterweight 2. The spring can provide a backward restoring force under compression to drive the counterweight 2 to reset. A sliding member 5 is movably arranged between the pen barrel 1 and the adjusting member 3. The front end of the sliding member 5 abuts against the rear end of the counterweight 2. The sliding member 5 is configured to dynamically cooperate with the pen barrel 1 to drive the counterweight 2 forward.

[0033] refer to Figures 4 to 6 The outer circumference of the pen barrel 1 is wound with a rotating groove 11, and the inner circumference of the slider 5 is wound with a protrusion 51 that matches the rotating groove 11. The protrusion 51 can slide along the rotating groove 11, thereby driving the counterweight 2 to move forward. Both the rotating groove 11 and the protrusion 51 are spirally distributed. The protrusion 51 and the rotating groove 11 can cooperate with each other. The purpose of their special "spiral" design is twofold: firstly, it can convert the rotational motion of the adjusting member 3 and the slider 5 into the axial motion of the counterweight 2, thereby achieving continuous fine-tuning of the counterweight 2's center of gravity; secondly, compared to a straight groove which requires an additional snap-fit ​​or damping structure, the spiral rotating groove 11 can use inclined friction to resist the accidental sliding of the counterweight 2, thereby improving its stability. (Reference) Figure 5 In this embodiment, the rotating groove 11 on the pen barrel 1 is provided with two rings, and the adjustment height range of the counterweight 2 is 0-15mm. By setting multiple rings of rotating groove 11, the rotation path can be extended. At this time, a larger rotation angle is required to move a unit distance in the axial direction, so that the fine adjustment is more precise. The adjustment accuracy in this embodiment can reach ±0.2mm.

[0034] refer to Figure 2 , Figure 4 and Figure 7The slider 5 is T-shaped, with convex posts 52 symmetrically arranged on the outer circumferential surface of the slider 5 near the rear end. The inner circumferential surface of the adjusting member 3 is provided with a mounting groove 31 for the convex posts 52 to be inserted. When the user rotates the adjusting member 3, since the convex posts 52 of the slider 5 are inserted into the mounting groove 31 of the adjusting member 3, the slider 5 can rotate synchronously under the drive of the adjusting member 3. The symmetrically arranged convex posts 52 can evenly distribute the rotation torque of the adjusting member 3 to both sides, avoiding uneven wear or jamming of the slider 5 due to force on one side, and thus improving the overall stability.

[0035] Because counterweight 2 will come into direct contact with elastic element 4 during movement, the two are prone to noise due to collision. (Refer to...) Figures 2 to 4 In this embodiment, a separator 6 is also sleeved on the outside of the pen barrel 1. The separator 6 is located between the front end of the counterweight 2 and the rear end of the elastic member 4. By setting the separator 6, direct contact between the two can be avoided.

[0036] Since the fingers mainly move along the axis of the pen barrel 1 during writing, refer to Figure 1 and Figure 2 In this embodiment, the outer peripheral surface of the adjusting member 3 is provided with eleven anti-slip parts 32. Each anti-slip part 32 extends along the axis A and is arranged at intervals along the circumference, which can better provide friction in the front and back directions and adapt to various pen-holding postures of users. The anti-slip part 32 increases the friction between the fingers and the surface of the adjusting member 3, which can prevent the user from slipping due to hand sweat, oil stains or insufficient grip strength.

[0037] The working principle of the adjustable center of gravity pen in this embodiment is as follows: When the user needs to draw, the counterweight 2 needs to be adjusted forward to move the center of gravity forward. Rotate the adjusting member 3 clockwise, and the sliding member 5 slides along the rotating groove 11 under the action of the adjusting member 3. The front end of the sliding member 5 drives the counterweight 2 to move forward until the counterweight 2 moves to the designated position. Then stop rotating the adjusting member 3. At this time, the pen switches from a high center of gravity state to a low center of gravity state. When the user needs to take notes, the counterweight 2 needs to be adjusted backward to move the center of gravity backward. Rotate the adjusting member 3 counterclockwise, and the sliding member 5 slides along the rotating groove 11 under the action of the adjusting member 3 to move backward. The counterweight 2 returns to its original position under the restoring force of the elastic member 4. At this time, the pen switches from a low center of gravity state to a high center of gravity state.

Claims

1. A pen with an adjustable center of gravity, comprising: Pen barrel (1); The counterweight (2) is sleeved on the outside of the pen barrel (1), and the counterweight (2) can slide back and forth along the axis formed by the front end and the rear end of the pen barrel (1); An adjusting element (3) is rotatably fitted on the outside of the pen barrel (1) and positioned behind the counterweight (2). The adjusting element (3) can rotate around the axis A of the pen barrel (1). Its features are: It also includes: An elastic element (4) is sleeved on the outside of the pen barrel (1). The rear end of the elastic element (4) abuts against the front end of the counterweight (2) and can provide a backward restoring force under pressure to drive the counterweight (2) to reset. A slider (5) is movably disposed between the pen barrel (1) and the adjusting member (3), and the front end of the slider (5) abuts against the rear end of the counterweight (2); wherein the slider (5) is configured to dynamically cooperate with the pen barrel (1) to drive the counterweight (2) to move forward.

2. The pen with adjustable center of gravity according to claim 1, characterized in that: The outer circumferential surface of the pen barrel (1) is provided with a rotating groove (11) and the inner circumferential surface of the sliding member (5) is provided with a protrusion (51) that matches the rotating groove (11). The protrusion (51) can slide along the rotating groove (11) to drive the counterweight (2) forward.

3. The pen with adjustable center of gravity according to claim 2, characterized in that: The rotating groove (11) and the protrusion (51) are both spirally distributed.

4. The pen with adjustable center of gravity according to claim 2, characterized in that: The rotating groove (11) has at least two rings.

5. The pen with adjustable center of gravity according to any one of claims 1 to 4, characterized in that: The outer peripheral surface of the sliding member (5) is provided with a protruding post (52), and the inner peripheral surface of the adjusting member (3) is provided with a mounting groove (31) for the protruding post (52) to be inserted.

6. The pen with adjustable center of gravity according to claim 5, characterized in that: The slider (5) is T-shaped in general, and two symmetrically arranged protrusions (52) are provided on the outer peripheral surface near the rear end of the slider (5).

7. The pen with adjustable center of gravity according to claim 1, characterized in that: The pen barrel (1) is also fitted with a separator (6) on the outside, and the separator (6) is located between the front end of the counterweight (2) and the rear end of the elastic member (4).

8. The pen with adjustable center of gravity according to claim 1, characterized in that: At least two anti-slip parts (32) are provided on the outer peripheral surface of the adjusting member (3).

9. The pen with adjustable center of gravity according to claim 8, characterized in that: Each of the anti-slip parts (32) extends along the axis A of the pen barrel (1) and is arranged at intervals in the circumferential direction.

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