High-strength mini needle tube pen point

Abstract

The utility model discloses a high-strength mini needle tube pen point which comprises a pen point body, a ball arranged at one end of the pen point body and a spring arranged in the pen point body, and a large hole section and a small hole section which are communicated with each other are sequentially arranged in the pen point body in the axial direction. The ball is installed on the small hole section and partially exposed out of the outlet end of the small hole section, the spring body is installed in the large hole section, and the straight needle is arranged at one end of the spring body, penetrates through the small hole section and abuts against the inner end of the ball. The ink cartridge is suitable for pigment type ink, solves the problem that ink melts when meeting water, and has the advantages of being high in strength and long and thin in appearance.

Description

Technical Field

[0001] The utility model relates to the technical field of pen tips, in particular to a high-strength mini needle pen tip. Background Art

[0002] As students seek small pens that do not block their vision, a large number of thin and long pen tips are used on the market. Figure 1 As shown, this type of pen tip has the following defects: first, the elongated pen tip on the market (attached Figure 1 ) has an outer diameter of 0.8mm. The outer diameter is very small, but the corresponding internal space is small. After adding the spring, the space is even smaller, which makes it impossible to use pigment ink with particles (dye ink generally refers to water-soluble ink pigment. Pigment ink is insoluble in water, so it needs to be ground and dispersed ultra-finely before it can be used). Because the particles are easy to gather in the tiny channels and clog the pen head, so the market, such as the attached Figure 1 The pen tip shown in the figure can only be used with dye ink, which will dissolve in water and cause great trouble. Figure 1 The outer diameter of the pen tip shown in the figure is 0.8mm. Its wall is too thin to be turned in large quantities. Currently, it is rolled from stainless steel tubes, which is not strong enough. If it falls on the ground, it is easy to shrink into the pen tube or bend. If the above problem is solved by increasing the outer diameter of the pen tip, as shown in the attached figure Figure 2 As shown, the pen tip is not slender enough. Utility Model Content

[0003] The purpose of the utility model is to provide a high-strength mini needle pen tip. The utility model is suitable for pigment ink, solves the problem of ink dissolving when it meets water, and has the advantages of high strength and slender appearance.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A high-strength mini needle pen tip, comprising a pen tip body, a ball arranged at one end of the pen tip body, and a spring arranged in the pen tip body, wherein a large hole section and a small hole section that are interconnected are arranged in sequence along the axial direction in the pen tip body, the ball is installed on the small hole section and the ball part is exposed at the outlet end of the small hole section, the spring comprises a spring body and a straight needle arranged at one end of the spring body, the spring body is installed in the large hole section, the straight needle is penetrated in the small hole section and abuts against the inner end of the ball.

[0005] By adopting the above technical solution, a large hole section and a small hole section are arranged in the nib body, the spring body is arranged in the large hole section, and the straight needle on the spring body is inserted into the small hole section, so that the inner cavity of the nib body has enough space after the spring is installed, which is suitable for pigment-type ink and solves the problem of ink dissolving when it comes into contact with water.

[0006] The present utility model is further configured such that the outer diameter of the pen tip body corresponding to the outer hole section is greater than the outer diameter of the pen tip body corresponding to the small hole section, so that a slender structure is formed at the position of the pen tip body corresponding to the small hole section.

[0007] By adopting the above technical solution, the outer diameter of the pen tip body corresponding to the large hole section is 1.3 mm, and the outer diameter of the pen tip body corresponding to the small hole section is 0.8 mm, making the pen tip have the advantage of a slender appearance.

[0008] The present utility model is further configured such that the pen tip body is processed by turning and drilling a solid steel material.

[0009] By adopting the above technical solution, the needle tube pen tip is obtained by turning and drilling a 1.3 mm solid steel material, having the advantages of high strength and not being easily bent. The ball moves with little wear in the hole, so the writing length is long, and there is no situation of unstable ink output caused by the rebound after rolling of the pipe material, resulting in unsmooth writing.

[0010] The present utility model is further configured such that an inwardly extending support portion is provided at the position of the pen tip body corresponding to the small hole section, and one end of the spring body away from the straight needle abuts against the support portion.

[0011] By adopting the above technical solution, the support portion is formed by stamping deformation. The support portion is used for axially limiting the spring to ensure the stable installation of the spring.

[0012] The present utility model is further configured such that the large hole section includes an outer mounting hole and an inner mounting hole. The diameter of the outer mounting hole is larger than that of the inner mounting hole. A force-relieving step is formed between the outer mounting hole and the inner mounting hole, and the support portion is provided in the outer mounting hole.

[0013] By adopting the above technical solution, when processing the support portion, the force-relieving step can greatly reduce the external force transmitted to the position of the pen tip body corresponding to the inner mounting hole, ensuring the straight appearance of the pen tip body.

[0014] The present utility model is further configured such that the spring further includes a conical spring portion. The spring portion is provided at one end of the spring body away from the straight needle, and the diameter of the conical spring portion gradually increases in the direction away from the spring body. The conical spring portion abuts against the support portion.

[0015] By adopting the above technical solution, the conical spring portion increases the support area of the spring, greatly improving the firmness of its installation and the stability during the movement process.

[0016] The present utility model is further configured such that an inwardly extending bead support is provided on the inner wall of the small hole section, and an inwardly extending necking portion is provided at the outlet end of the small hole section. The ball is movably arranged between the bead support and the necking portion.

[0017] By adopting the above technical solution, the installation of the ball holder on the pen head body is realized.

[0018] The utility model is further configured such that the small hole section includes a flow hole, an inner flow hole, a flow hole and an outer flow hole in sequence in the direction away from the large hole section, the diameters of the flow hole, the inner flow hole and the flow hole decrease in sequence, and the diameter of the inner flow hole is the same as the diameter of the outer flow hole.

[0019] By adopting the above technical solution, the diameters of the corresponding inner flow holes and outer flow holes at both ends of the bead holder are the same, making its structure more symmetrical, which not only improves the structural stability but also facilitates processing.

[0020] The utility model is further configured such that the outer diameter of the position of the nib body corresponding to the large hole section is 1.25-1.35 mm, the outer diameter of the position of the nib body corresponding to the small hole section is 0.7-0.9 mm, and the axial length is 2-4 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the first pen tip structure in the prior art;

[0022] Figure 2 It is a schematic diagram of the second pen tip structure in the prior art;

[0023] Figure 3 It is the overall appearance diagram of the utility model;

[0024] Figure 4 A cross-sectional view of the utility model as a whole;

[0025] Figure 5 It is a schematic diagram of the processing structure of the pen head main body of the utility model.

[0026] In the figure: 1. Pen tip body; 2. Ball; 3. Spring; 4. Large hole section; 5. Small hole section; 6. Spring body; 7. Straight needle; 8. Support part; 9. Mounting outer hole; 10. Mounting inner hole; 11. Unloading step; 12. Conical spring part; 13. Ball holder; 14. Closing part; 15. Flow hole; 16. Flow inner hole; 17. Flow flow hole; 18. Flow outer hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example: As shown in the attachedFigures 1 to 5 A high-strength mini syringe pen tip as shown, comprising a pen tip body 1, a ball bead 2 disposed at one end of the pen tip body 1, and a spring 3 disposed inside the pen tip body 1. A large hole section 4 and a small hole section 5 communicating with each other are sequentially arranged along the axial direction inside the pen tip body 1. The ball bead 2 is installed on the small hole section 5 and a part of the ball bead 2 protrudes from the outlet end of the small hole section 5. The spring 3 includes a spring body 6 and a straight needle 7 disposed at one end of the spring body 6. The spring body 6 is installed inside the large hole section 4, and the straight needle 7 is inserted into the small hole section 5 and abuts against the inner end of the ball bead 2. A large hole section 4 and a small hole section 5 are arranged inside the pen tip body 1, the main body of the spring 3 is disposed inside the large hole section 4, and the straight needle 7 on the main body of the spring 3 is inserted into the small hole section 5, so that there is enough space inside the pen tip body 1 after the spring 3 is installed, which is suitable for pigment-based ink and solves the problem of ink bleeding when encountering water.

[0029] As shown in the Figure 4 attachment, the outer diameter of the pen tip body 1 corresponding to the installation of the outer hole 9 section is larger than the outer diameter of the pen tip body 1 corresponding to the small hole section 5, so that a slender structure is formed at the position of the pen tip body 1 corresponding to the small hole section 5. The outer diameter of the pen tip body corresponding to the large hole section is 1.25 - 1.35 mm, 1.3 mm is taken in this embodiment, the outer diameter of the pen tip body corresponding to the small hole section is 0.7 - 0.9 mm, 0.8 mm is taken in this embodiment, and the axial length is 2 - 4 mm. This pen tip has the advantage of a slender appearance.

[0030] Among them, the pen tip body 1 is processed by turning and drilling a solid steel material. The syringe pen tip is turned and drilled from a 1.3 mm solid steel material, which has the advantages of high strength and not being easily bent. The ball bead 2 has little rolling wear in the hole, so the writing length is long, and there is no situation where the ink output is unstable due to the rebound after tube rolling, resulting in unsmooth writing.

[0031] As shown in the Figure 5 attachment, its processing steps are to drill the punching section in three times first, and then drill the small hole section 5 in six times.

[0032] As shown in the Figure 4 attachment, a support portion 8 extending inward is provided at the portion of the pen tip body 1 corresponding to the small hole section 5. One end of the spring body 6 away from the straight needle 7 abuts against the support portion 8. The support portion 8 is formed by stamping deformation. The support portion 8 is used for axially limiting the spring 3 to ensure the stable installation of the spring 3.

[0033] As shown in the Figure 4As shown, the large-hole section 4 includes a mounting outer hole 9 and a mounting inner hole 10. The diameter of the mounting outer hole 9 is larger than that of the mounting inner hole 10. A force-relieving step 11 is formed between the mounting outer hole 9 and the mounting inner hole 10. The support portion 8 is disposed in the mounting outer hole 9. When machining the support portion 8, the force-relieving step 11 can greatly reduce the external force transmitted to the position of the pen tip body 1 corresponding to the mounting inner hole 10, ensuring the straight appearance of the pen tip body 1.

[0034] As shown in the Figure 4 drawing, the spring 3 further includes a conical spring portion 12. The spring body 6, the straight needle 7, and the conical spring portion 12 are of an integral structure. The spring 3 portion is disposed at one end of the spring body 6 away from the straight needle 7, and the diameter of the conical spring portion 12 gradually increases in the direction away from the spring body 6. The conical spring portion 12 abuts against the support portion 8. The conical spring portion 12 increases the support area of the spring 3, greatly improving the firmness of its installation and the stability during the movement process.

[0035] As shown in the Figure 4 drawing, the inner wall of the small-hole section 5 is provided with a bead support extending inward. The outlet end of the small-hole section 5 is provided with a constriction portion 14 extending inward. The ball bead 2 is movably disposed between the bead support and the constriction portion 14. This design realizes the installation of the bead support on the pen tip body 1.

[0036] As shown in the Figure 4 drawing, the small-hole section 5 sequentially includes a flow-through hole 15, a flow-through inner hole 16, a flow-through through-hole 17, and a flow-through outer hole 18 in the direction away from the large-hole section 4. The diameters of the flow-through hole 15, the flow-through inner hole 16, and the flow-through through-hole 17 decrease in sequence. The diameter of the flow-through inner hole 16 is the same as that of the flow-through outer hole 18. The ball bead 2 is disposed in the flow-through outer hole 18. The flow-through inner hole 16 and the flow-through outer hole 18 are respectively disposed on both sides of the bead support. The diameters of the flow-through inner hole 16 and the flow-through outer hole 18 corresponding to both ends of the bead support are the same, making its structure more symmetrical, not only having better structural stability but also being conducive to processing.

Claims

1. A high-strength mini needle pen tip, comprising a pen tip body (1), a ball (2) disposed at one end of the pen tip body (1), and a spring (3) disposed in the pen tip body (1), characterized in that: The pen head body (1) is provided with a large hole section (4) and a small hole section (5) which are connected to each other in sequence along the axial direction; the ball (2) is mounted on the small hole section (5) and a portion of the ball (2) is exposed at the outlet end of the small hole section (5); the spring (3) comprises a spring body (6) and a straight needle (7) arranged at one end of the spring body (6); the spring body (6) is installed in the large hole section (4); the straight needle (7) is inserted into the small hole section (5) and abuts against the inner end of the ball (2); The outer diameter of the section of the nib body (1) corresponding to the installation outer hole (9) is greater than the outer diameter of the section of the nib body (1) corresponding to the small hole section (5), so that the position of the nib body (1) corresponding to the small hole section (5) forms a slender structure; the nib body (1) is formed by turning and drilling solid steel; the outer diameter of the section of the nib body (1) corresponding to the large hole section (4) is 1.25 to 1.35 mm, the outer diameter of the section of the nib body (1) corresponding to the small hole section (5) is 0.7 to 0.9 mm, and the axial length is 2 to 4 mm.

2. The high-strength mini needle pen tip according to claim 1, characterized in that: A support portion (8) extending inward is provided at a position of the pen tip body (1) corresponding to the small hole section (5), and an end of the spring body (6) away from the straight needle (7) abuts against the support portion (8).

3. The high-strength mini needle pen tip according to claim 2, characterized in that: The large hole section (4) comprises an outer mounting hole (9) and an inner mounting hole (10), the diameter of the outer mounting hole (9) being larger than the diameter of the inner mounting hole (10), a force unloading step (11) being formed between the outer mounting hole (9) and the inner mounting hole (10), and the support portion (8) being arranged in the outer mounting hole (9).

4. The high-strength mini needle pen tip according to claim 2, characterized in that: The spring (3) further comprises a conical spring portion (12), the spring (3) portion being arranged at an end of the spring body (6) away from the straight needle (7), and the diameter of the conical spring portion (12) gradually increases in a direction away from the spring body (6), and the conical spring portion (12) abuts against the support portion (8).

5. The high-strength mini needle pen tip according to claim 1, characterized in that: The inner wall of the small hole section (5) is provided with a bead holder (13) extending inwardly, the outlet end of the small hole section (5) is provided with a closing portion (14) extending inwardly, and the ball (2) is movably arranged between the bead holder (13) and the closing portion (14).

6. The high-strength mini needle pen tip according to claim 1, characterized in that: The small hole section (5) comprises, in sequence in a direction away from the large hole section (4), a flow hole (15), an inner flow hole (16), a flow hole (17) and an outer flow hole (18); the diameters of the flow hole (15), the inner flow hole (16) and the flow hole (17) decrease in sequence; the diameter of the inner flow hole (16) is the same as the diameter of the outer flow hole (18).

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