Double-ball pen point

Abstract

The utility model provides a double-bead pen point which comprises a rod-shaped pen point body, a printing ink channel is arranged in the pen point body in the axial direction in a penetrating mode, an annular interlayer ball seat is arranged on the wall of the front end of the printing ink channel, a first ball bead, a second ball bead and a spring are arranged in the printing ink channel, the first ball bead is located on the front side of the interlayer ball seat, and the second ball bead is located on the back side of the interlayer ball seat. The second ball bead and the spring are located on the rear side of the interlayer ball seat, the second ball bead abuts against the first ball bead, the spring abuts against the second ball bead, the second ball bead is located on the inner side of the interlayer ball seat, and the front end of the spring extends into the interlayer ball seat and abuts against the second ball bead. When the double-ball pen point is generated and manufactured, the axial thickness of the interlayer ball seat between the first ball and the second ball does not need to be controlled, the machining difficulty of the double-ball pen point is lowered, and the pen manufacturing yield is increased. The front ends of the second ball and the spring are located in the interlayer ball seat, the second ball and the spring are limited and positioned, the first ball, the second ball and the spring are matched more stably, and work is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of pen tips, in particular to a double-ballpoint pen tip. Background Art

[0002] Double ballpoint pens have two closely spaced balls at the tip. They are commonly used in writing instruments such as ballpoint pens and water-based pens.

[0003] Patent CN 216423901 U discloses a double-ballpoint pen tip with low manufacturing difficulty. Ball one is located on the front side of the ball seat, and ball two is located on the rear side. The diameter of ball two is smaller than the diameter of the connecting hole in the center of the ball seat. This eliminates the need to consider the thickness of the ball seat between balls one and two during machining. This simplifies ball seat machining, reduces the manufacturing difficulty, and improves the yield rate of pens.

[0004] However, there are still problems with the ball and spring having poor stability. Utility Model Content

[0005] In view of the problems pointed out in the background technology, the present invention proposes a double-ballpoint pen tip to solve the above technical problems.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A double-ballpoint pen tip comprises a rod-shaped pen tip body, an ink channel is axially penetrated in the pen tip body, an annular interlayer ball seat is provided on the front end wall of the ink channel, ball 1, ball 2, and a spring are provided in the ink channel, ball 1 is located on the front side of the interlayer ball seat, ball 2 and the spring are located on the rear side of the interlayer ball seat, ball 2 abuts against ball 1, the spring abuts against ball 2, and ball 2 is located on the inner side of the interlayer ball seat.

[0008] The utility model is further configured such that the second ball is located on the inner side of the interlayer ball seat in the axial direction.

[0009] The utility model is further configured such that the front end of the spring extends into the interlayer ball seat and abuts against the second ball.

[0010] The utility model is further configured such that the spring is composed of an insertion portion and a telescopic portion, the insertion portion is linear, and the front end of the insertion portion extends into the interlayer ball seat and abuts against the second ball.

[0011] The present invention is further configured such that the diameter of the pen tip body is 2.3 mm.

[0012] The present utility model is further configured such that the diameter of the second ball is 0.28 mm.

[0013] The present utility model is further configured such that the diameter of the first ball is 0.5 mm.

[0014] The present utility model is further configured such that the wire diameter of the spring is 0.2 mm.

[0015] The present utility model is further configured such that the inner diameter of the spacer ball seat is 0.3 mm.

[0016] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] (1) When it is manufactured, there is no need to control the axial thickness of the spacer ball seat between the first ball and the second ball, which reduces the processing difficulty of the double-ball pen tip and improves the yield rate of pen manufacturing.

[0018] (2) The front ends of the second ball and the spring are both located within the spacer ball seat, which plays a role in restricting and positioning the second ball and the spring, making the cooperation among the first ball, the second ball and the spring more stable and reliable in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Structural schematic of the present utility model Figure 1 .

[0021] Figure 2 Structural schematic of the present utility model Figure 2 .

[0022] Figure 3 For the present utility model Figure 1 Enlarged view of part A. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] As follows for referenceFigures 1-3 Description of the present utility model:

[0025] Embodiment 1: A double-bead pen tip, including a rod-shaped pen tip body 1, an ink channel 2 is axially penetrated through the pen tip body 1, and the ink channel 2 is used for transporting ink.

[0026] An annular spacer ball seat 3 is provided on the wall at the front end of the ink channel 2, and the spacer ball seat 3 serves to support the first ball bead 4.

[0027] A first ball bead 4, a second ball bead 5, and a spring 6 are provided in the ink channel 2. The first ball bead 4 is located on the front side of the spacer ball seat 3, the second ball bead 5 and the spring 6 are located on the rear side of the spacer ball seat 3. The second ball bead 5 abuts against the first ball bead 4, and the spring 6 abuts against the second ball bead 5. The first ball bead 4 is located on the front side of the spacer ball seat 3, the second ball bead 5 abuts against the first ball bead 4, and the spring 6 abuts against the second ball bead 5, forming a structure that works together.

[0028] The second ball bead 5 is located on the inner side of the spacer ball seat 3 in the axial direction. The front end of the spring 6 extends into the spacer ball seat 3 and abuts against the second ball bead 5. The spring 6 is composed of an insertion portion 61 and a telescopic portion 62. The insertion portion 61 is linear, and the front end of the insertion portion 61 extends into the spacer ball seat 3 and abuts against the second ball bead 5. This design enables the spring 6 to stably provide pressure for the second ball bead 5.

[0029] The front ends of the second ball bead 5 and the spring 6 are located in the spacer ball seat 3, and have the following important functions:

[0030] 1. Reduce processing difficulty: During production and manufacturing, there is no need to precisely control the axial thickness of the spacer ball seat 3 between the first ball bead 4 and the second ball bead 5, which simplifies the processing technology, reduces the rejection rate caused by overly high dimensional accuracy requirements, thereby reducing the processing difficulty of the double-bead pen tip and improving the yield rate of pen manufacturing.

[0031] 2. Stable and reliable: It serves to limit and position the second ball bead 5 and the spring 6, making the cooperation among the first ball bead 4, the second ball bead 5, and the spring 6 more stable. During the writing process, it can ensure the uniform outflow of ink, improving the stability and reliability of writing.

[0032] For example, in daily writing and drawing, this stable and reliable structure can ensure the continuity and uniformity of the lines. Whether it is rapid writing or detailed drawing, it can provide good performance.

[0033] In summary, the structural design of this double-bead pen tip has innovations, reducing the processing difficulty while improving the writing performance and stability.

[0034] The outer diameter of the telescopic part 62 of the spring 6 is equal to or slightly smaller than the inner diameter of the ink channel 2. If the outer diameter of the telescopic part 62 is equal to the inner diameter of the ink channel 2, it can ensure that the spring maintains a stable linear motion during the telescopic process without skew or jamming. This helps the spring to always provide a uniform and stable pressure to the ball bead two 5, ensuring the stability and uniformity of the ink flow during the writing process. When the outer diameter of the telescopic part 62 is slightly smaller than the inner diameter of the ink channel 2, it provides a certain margin for the spring to expand and contract, reducing the frictional resistance between the spring and the inner wall of the ink channel. This can make the expansion and contraction of the spring smoother, extend the service life of the spring, and also reduce the energy loss that may be caused by excessive friction, helping to improve the working efficiency of the pen tip.

[0035] The diameter of the pen tip body 1 is 2.3 mm.

[0036] The diameter of the ball bead two 5 is 0.28 mm.

[0037] The diameter of the ball bead one 4 is 0.5 mm.

[0038] The wire diameter of the spring 6 is 0.2 mm.

[0039] The inner diameter of the spacer ball seat 3 is 0.3 mm.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A double-ball pen tip, comprising a rod-shaped pen tip body (1). An ink channel (2) is axially penetrated through the pen tip body (1). An annular partition ball seat (3) is provided on the wall at the front end of the ink channel (2). A first ball (4), a second ball (5), and a spring (6) are provided in the ink channel (2). The first ball (4) is located on the front side of the partition ball seat (3), and the second ball (5) and the spring (6) are located on the rear side of the partition ball seat (3). The second ball (5) abuts against the first ball (4), and the spring (6) abuts against the second ball (5). It is characterized in that: The second ball (5) is located inside the partition ball seat (3); the second ball (5) is located axially inside the partition ball seat (3); the front end of the spring (6) extends into the partition ball seat (3) and abuts against the second ball (5).

2. The double-bead pen tip according to claim 1, characterized in that: The spring (6) is composed of an insertion part (61) and a telescopic part (62). The insertion part (61) is linear, and the front end of the insertion part (61) extends into the partition ball seat (3) and abuts against the second ball (5).

3. A double-bead pen tip according to claim 1, characterized in that: The diameter of the pen tip body (1) is 2.3 mm.

4. A double-bead pen tip according to claim 1, characterized in that: The diameter of the second ball (5) is 0.28 mm.

5. A double-bead pen tip according to claim 1, characterized in that: The diameter of the first ball (4) is 0.5 mm.

6. A double-bead pen tip according to claim 1, characterized in that: The wire diameter of the spring (6) is 0.2 mm.

7. A double-bead pen tip according to claim 1, characterized in that: The inner diameter of the partition ball seat (3) is 0.3 mm.

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