Pressure-adjustable ballpoint pen using compression spring

Abstract

To provide a ballpoint pen that is as stable as a fountain pen in order to solve the problem that as people get older, when they write with a ballpoint pen, the pressure from their hand becomes unstable and the pen slides or shakes on the paper, making it difficult to write neatly.SOLUTION: A crimped portion of a ballpoint pen is used as a partition, and pressure from the ball side takes priority, pressurizing a second compression spring on the rear side, increasing the spring constant, and the reaction force is reflected on the ball as writing pressure, allowing a user to write letters while adjusting the writing pressure.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pressure-adjustable ballpoint pen that utilizes a compression spring. [Background technology]

[0002] A proposal for a pressure-adjustable ballpoint pen that uses a compression spring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-174261 [Patent Document 2] Japanese Patent Application Publication No. 2023-075358 Summary of the Invention [Problem to be solved by the invention]

[0004] As we get older, when writing with a ballpoint pen, the pressure from our hands becomes unstable and the pen slips or shakes on the paper. It is difficult to write neat letters. We developed a ballpoint pen that has the stability of a fountain pen. [Means for solving the problem]

[0005] A first compression spring is attached to the ball side of the crimped part at the tip of the refill of a commercially available general-purpose low-cost knock-type ballpoint pen. A second compression spring is placed behind the crimped portion, and the crimped portion is connected to the ball side compression spring and the rear side compression spring. The pressure from the ball side is prioritized as the partition, and the second compression spring on the rear side is pressurized, and the spring constant The force is increased and the reaction force is reflected in the ball as writing pressure, allowing the user to write characters while adjusting the writing pressure. In addition, the pressure applied to the compression spring changes in response to the change in the writing pressure of the ballpoint pen user, and the pressure between the writing object and the compression spring changes. Even if there is variation, it is absorbed by the compression spring, reducing distortion of the characters. In addition, with the mechanism of claim 1, the rear end of the refill of the knock-type ballpoint pen comes into contact with the cap and two compression springs The force applied to the ballpoint pen case is transferred directly to the ball, and the pen functions as a normal ballpoint pen. The lengths of the capped spacer and two compression springs were set so that they could be used. [Effects of the Invention]

[0006] Even if there is a variation in writing pressure between the writing object and the writing pressure due to the change in the writing pressure applied to the compression spring, The compression spring absorbs the force, reducing the distortion of the letters, and it is now possible to write while adjusting the pressure of the pen. [Brief explanation of the drawings]

[0007] [Figure 1] Figure 1 shows a side view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is weak. [Figure 2] Figure 2 is a side view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is strong. [Figure 3] Figure 3 shows a front view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is weak. [Figure 4] Figure 4 shows a front view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is strong. [Figure 5] Figure 5 is a side view of a pressure-adjustable ballpoint pen with a compression spring when the pen tip is retracted. [Figure 6] Figure 6 shows a detailed view of the clip of a pressure-adjustable ballpoint pen that uses a compression spring. [Figure 7] Figure 7 shows the results when the writing pressure of a pressure-adjustable ballpoint pen using a compression spring is changed from weak to strong. [Figure 8] Figure 8 shows a photograph of the refill for a commercially available, general-purpose, low-cost knock-type ballpoint pen used in the prototype. [Figure 9] Figure 9 shows a photograph of the two compression springs used in the prototype. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to FIGS.

[0009] FIG. 1 is a side view of a pressure-adjustable ballpoint pen that uses a compression spring when the writing pressure is weak.

[0010] FIG. 2 is a side view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is strong.

[0011] FIG. 3 is a front view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is weak.

[0012] FIG. 4 is a front view of a pressure-adjustable ballpoint pen using a compression spring when the writing pressure is strong.

[0013] FIG. 5 is a side view of a pressure-adjustable ballpoint pen that uses a compression spring when the pen tip is retracted.

[0014] FIG. 6 shows the details of the clip of a pressure-adjustable ballpoint pen that uses a compression spring.

[0015] Figure 7 shows the results of changing the writing pressure of a pressure-adjustable ballpoint pen that uses a compression spring from weak to strong.

[0016] Figure 8 shows a photograph of the refill for a commercially available, general-purpose, low-cost knock-type ballpoint pen used in the prototype.

[0017] Figure 9 shows a photograph of the two compression springs used in the prototype. [Example]

[0018] FIG. 2 is a representative diagram of the present invention. [Industrial Applicability]

[0019] As we age, when writing with a ballpoint pen, the pressure from our hands becomes unstable and the pen slips on the paper. It is difficult to write calm characters due to the shaking of the pen, so we developed a ballpoint pen that has the stability of a fountain pen. Manufactured and sold as a convenient item. [Explanation of symbols]

[0020] 1 Size (length) when a specific pressure A is applied to the compression spring on the ball side 2 Size (length) when a specific pressure B is applied to the rear compression spring 3. Length of ballpoint pen case 4 Length of spacer with cap 5. Size (length) when a specific pressure B + pressure variable β is applied to the rear compression spring 6 Size (length) when a specific pressure A + pressure variable α is applied to the ball-side compression spring 7. Length of ballpoint pen lead 8 Capped spacers 9 Capped spacer moving pinion 10 Clip side pinion support 11 Pinion mounting recess in ballpoint pen case 12. Empty ink in ballpoint pen core 13 Ballpoint pen clip and pinion support 14 Ballpoint pen case 15 Pinion rotation knob 16 Pinion shaft 17 Gap between the clip and the ballpoint pen case 18 Cap 19 Stopper for compression spring on ball side 20 Reaction force to weak pressure of ballpoint pen 21 Reaction force to strong pressure from a ballpoint pen 22. Shows a state shift when a ballpoint pen is applied with weak and strong pressure. 23 Shows the continuous state of reaction force against strong pressure of ballpoint pen 24 Adjust the position of the capped spacer to the ball position adjustment state. 25 sheets of paper 26 Displaying the tilt of the pen tip of a pressure-adjustable ballpoint pen using a compression spring 27 Display of reaction force against pressure of ballpoint pen 28 Display of continuous pressure state of ballpoint pen 29 Ball side compression spring 30 Spacer lock by pinion 31 Pressure applied to the core of a ballpoint pen 32 Size (length) when a specific pressure B is applied to the rear compression spring: When strong pressure is applied 33 Size (length) when a specific pressure A is applied to the compression spring on the ball side: When strong pressure is applied 24E Adjust the position of the capped spacer to the ball position. 35 Marks that have come into contact with the cap

Claims

1. A first compression spring is attached to the ball side of the crimped part at the tip of the refill of a commercially available general-purpose low-cost knock-type ballpoint pen. A second compression spring is placed behind the crimped portion, and the crimped portion is connected to the ball side compression spring and the rear side compression spring. The pressure from the ball side is prioritized as the partition, and the second compression spring on the rear side is pressurized, and the spring constant The force is increased and the reaction force is reflected in the ball as writing pressure, allowing the user to write characters while adjusting the writing pressure. A pressure-adjustable ballpoint pen that utilizes a compression spring.

2. By utilizing the mechanism of claim 1, the writing object is moved by the change in the writing pressure applied to the compression spring in response to the change in the writing pressure of the ballpoint pen user. Even if there is a variation in writing pressure between the pen and the writing surface, it is absorbed by the compression spring, resulting in less distortion of the characters.

3. In the mechanism of claim 1, the rear end of the refill of the knock-type ballpoint pen contacts the cap, and two compression springs The force applied to the ballpoint pen case is transferred directly to the ball, and the pen functions as a normal ballpoint pen. It features a spacer with a cap and two compression springs with different lengths that can be used. A pressure-adjustable ballpoint pen that uses a compression spring.

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