Direct-liquid type soft-head pen

The combined structure of the ink cartridge, ink regulator and water guide core solves the problems of high damage rate and unstable structure of direct liquid soft-tip pens during production, realizes automated production and stable ink flow, and improves the yield and writing effect.

CN223370455UActive Publication Date: 2025-09-23TONGLU HUICAI STATIONERY CO LTD
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Patent Information

Application Number
CN202422819432.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2025-09-23
Estimated Expiration
2034-11-19

AI Technical Summary

Technical Problem

Direct-liquid soft-tip pens have high damage rates and unstable structures during the production process, making automated production difficult. In addition, poor contact between the water core and the water reservoir results in uneven ink flow or inability to write normally.

Method used

It adopts a combined structure of ink cartridge, ink regulator, water guide core and limit head. Through the limit protrusion and groove clamping, combined with multi-layer fin and flow channel design, it ensures the firm connection between the water guide core, the pen head and ink regulator, realizing a simple installation process and stable ink flow.

Benefits of technology

It simplifies the installation process, improves the yield rate, ensures the stability of the structure and the uniform flow of ink, and achieves high-quality writing effects.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a direct liquid type soft head pen which comprises an ink cylinder, an ink regulator, a water leading core, a limiting head and a pen point, a first channel is arranged in the limiting head, a plurality of first limiting protrusions are arranged in the first channel, the pen point is provided with a limiting groove, and the pen point is connected with the first limiting protrusions in a clamped mode through the limiting groove. The ink regulator is provided with a first flow channel penetrating through the ink regulator, the ink guide core penetrates through the first flow channel, one end of the ink guide core abuts against one end of the pen point, the other end of the ink guide core extends into the ink cylinder, a first step is arranged on the outer wall of the ink guide core, and a second step abutting against the first step is arranged on the inner wall of the first flow channel. The ink regulator is provided with an ink inlet part, and the part, penetrating out of the first flow channel and extending into the ink cylinder, of the ink guide core extends into the ink inlet part. Operation of an automatic production line is facilitated, and the yield is effectively improved. More importantly, the two ends of the ink guiding core are firmly connected with the pen point and the ink regulator respectively, the stability of the structure and the uniform outflow of ink are ensured, and therefore the excellent writing effect is achieved.
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Description

Technical Field

[0001] The utility model relates to a pen, in particular to a straight liquid type soft-tip pen. Background Art

[0002] Current production processes for direct-liquid soft-tip pens face a high damage rate. The cumbersome assembly steps and unstable structure hinder automated production. If the pens are manufactured separately and then assembled, the ink core is easily damaged while passing through the reservoir. Furthermore, if the reservoir is molded using a closed mold, precise adjustment of the ink core's position is difficult, often leading to problems such as poor contact between the ink core and the reservoir, uneven ink flow, and even inability to write properly. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model aims to provide a straight liquid soft-tip pen.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a straight liquid soft-tip pen, comprising an ink tank, an ink regulator, a water guide core, a limit head, and a pen tip, the ink tank being a rod-shaped structure containing a cavity, the ink tank being provided with an opening, the limit head being provided at the opening of the ink tank, a first channel being provided in the limit head, a plurality of first limit protrusions and a second limit protrusion being provided in the first channel, a portion of the pen tip being provided in the first channel, and the tip of the pen tip passing through the first channel, the pen tip being provided with a limit groove cooperating with the first limit protrusion, the pen tip being clamped with the first limit protrusion in the first channel through the limit groove; the ink regulator being fixed in the cavity of the ink tank and close to the opening of the ink tank , one end of the ink regulator close to the opening of the ink cartridge is located in the first channel and is plugged into the second limiting protrusion. The ink regulator is provided with a first flow channel running through it, and a first groove is provided at one end of the first flow channel close to the limiting head, and one end of the nib is plugged into the first groove; the water guide core passes through the first flow channel, one end of the water guide core abuts against an end of the nib close to the first groove, and the other end extends into the ink cartridge, and the outer wall of the water guide core is provided with a first step, and correspondingly, the inner wall of the first flow channel is provided with a second step abutting against the first step for preventing the water guide core from shifting; the ink regulator is provided with an ink inlet part at one end away from the opening of the ink cartridge, and the part of the water guide core that passes through the first flow channel and extends into the ink cartridge extends into the ink inlet part.

[0005] Preferably, the ink inlet portion is provided with a second flow channel, the second flow channel is communicated with the first flow channel, one end of the water guide core is located in the second flow channel, and the second flow channel is communicated with the ink cylinder.

[0006] Preferably, an ink inlet is provided on the side wall of the ink inlet portion, and the ink inlet is connected to the ink cylinder and the side wall of the water guide core.

[0007] Preferably, the number of the ink inlets is two and they are arranged oppositely on two sides of the water guide core.

[0008] Preferably, the side wall of the ink regulator is provided with several layers of fins, and the side wall of the ink regulator is provided with an ink flow gap that passes through the several layers of fins and the end of the ink regulator away from the ink cylinder opening, and the end of the ink flow gap close to the pen tip is provided with an ink flow through hole that passes through the side wall of the ink regulator, and the ink flow through hole is connected to the first flow channel.

[0009] Preferably, a third flow channel is opened on the side wall of the ink inlet portion, and the third flow channel is connected to the ink flow gap.

[0010] Preferably, a guide strip is provided on the inner wall of the ink cartridge cavity, and the guide strip extends from an end of the ink cartridge away from the opening to an ink flow gap close to the ink regulator.

[0011] Preferably, the guide strip has a sloped surface at one end close to the ink flow gap of the ink regulator.

[0012] Preferably, a third step is provided on the inner wall of the ink cartridge cavity, and the third step abuts against an end face of the ink regulator away from the ink cartridge opening.

[0013] Preferably, the water diversion core is a cylindrical core with conical ends.

[0014] The beneficial effects of the present invention are as follows: when installing the present invention, first, the ink regulator is abutted and fixed at the opening of the ink cartridge, and then one end of the water guide core is inserted into the first flow channel in the ink regulator, wherein the first step provided on the outer wall of the water guide core abuts the second step provided on the inner wall of the first flow channel. Next, the pen tip is engaged with the first limiting protrusion in the first channel of the limiting head through the limiting groove, and then the limiting head is fixed at the opening of the ink cartridge. At this time, one end of the water guide core just abuts against one end of the pen tip. This installation process is simple and clear, facilitates the operation of the automated production line, and effectively improves the yield of finished products. More importantly, the two ends of the water guide core are firmly connected to the pen tip and the ink regulator respectively, ensuring the stability of the structure and the uniform outflow of ink, thereby achieving an excellent writing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 This is one of the structural diagrams of the ink regulator;

[0017] Figure 3 This is the second structural diagram of the ink regulator;

[0018] Figure 4 is a cross-sectional view of an ink regulator;

[0019] Figure 5 It is a structural diagram of the limit head;

[0020] Figure 6 Schematic diagram of the structure of the ink cartridge;

[0021] Figure 7 This is a structural diagram of the water diversion core;

[0022] Figure 8 Schematic diagram of the structure of the pen tip. DETAILED DESCRIPTION

[0023] like Figures 1-8 As shown, a straight liquid soft-tip pen includes an ink tank 1, an ink regulator 2, a water guide core 3, a limiting head 4, and a pen tip 5. The ink tank 1 is a rod-shaped structure containing a cavity. The ink tank 1 is provided with an opening. The limiting head 4 is provided at the opening of the ink tank 1. A first channel 6 is provided in the limiting head 4. The first channel 6 is provided with a plurality of first limiting protrusions 7 and second limiting protrusions 8. Part of the pen tip 5 is provided in the first channel 6, and the tip of the pen tip 5 passes through the first channel 6. The pen tip 5 is provided with a limiting groove 9 that cooperates with the first limiting protrusion 7. The pen tip 5 is engaged with the first limiting protrusion 7 in the first channel 6 through the limiting groove 9; the ink regulator 2 is fixed in the cavity of the ink tank 1 and close to the opening of the ink tank 1. The ink regulator 2 is close to the opening of the ink tank 1. One end of the ink regulator 2 is located in the first channel 6 and is plugged into the second limiting protrusion 8. The ink regulator 2 is provided with a first flow channel 10 running through the interior thereof, and a first groove 11 is provided at an end of the first flow channel 10 close to the limiting head 4, and one end of the nib 5 is plugged into the first groove 11; the water guide core 3 passes through the first flow channel 10, and one end of the water guide core 3 abuts against an end of the nib 5 close to the first groove 11, and the other end extends into the ink cylinder 1. The outer wall of the water guide core 3 is provided with a first step 13, and correspondingly, the inner wall of the first flow channel 10 is provided with a second step 14 abutting against the first step 13 for preventing the water guide core 3 from shifting; the ink regulator 2 is provided with an ink inlet portion 15 at the end away from the opening of the ink cylinder 1, and the part of the water guide core 3 that passes through the first flow channel 10 and extends into the ink cylinder 1 extends into the ink inlet portion 15.

[0024] The ink inlet 15 is provided with a second flow channel 16, which is communicated with the first flow channel 10. One end of the water guide core 3 is located in the second flow channel 16, and the second flow channel 16 is communicated with the ink cartridge 1. Ink can enter the second flow channel 16 from the ink cartridge 1 and then flow into one end of the water guide core 3.

[0025] An ink inlet 17 is provided on the side wall of the ink inlet portion 15 , and the ink inlet 17 connects the ink cartridge 1 with the side wall of the water guide core 3 . Ink can enter the first flow channel 10 from the side wall of the water guide core 3 through the ink inlet 17 , thereby increasing the flow rate.

[0026] Preferably, the ink inlet 17 is provided in two numbers and is relatively arranged on both sides of the water guide core 3, thereby increasing the area ratio of the ink inlet 17 and maximizing the siphon effect.

[0027] The side wall of the ink regulator 2 is provided with several layers of fins 18, and the side wall of the ink regulator 2 is provided with an ink flow gap 19 that penetrates the several layers of fins 18 and the end of the ink regulator 2 away from the opening of the ink cartridge 1. The ink flow gap 19 is provided with an ink flow through hole 20 that penetrates the side wall of the ink regulator 2 at the end close to the pen tip 5. The ink flow through hole 20 is connected to the first flow channel 10. Ink can enter the gap between the side wall of the ink regulator 2 and the ink cartridge 1 through the ink flow gap 19. According to the capillary principle, the ink absorption speed can be made faster and more stable through the multiple layers of fins 18. Finally, the ink returns to the first flow channel 10 through the ink flow through hole 20.

[0028] Preferably, a third flow channel 21 is opened on the side wall of the ink inlet portion 15, and the third flow channel 21 is connected to the ink flow gap 19. Ink can enter the ink flow gap 19 through the third flow channel 21, thereby increasing the flow rate of ink entering the ink flow gap 19.

[0029] Preferably, a guide strip 22 is provided on the inner wall of the cavity of the ink cartridge 1, and the guide strip 22 extends from the end of the ink cartridge 1 away from the opening to the ink flow gap 19 close to the ink regulator 2. The ink can enter the ink flow gap 19 along the guide strip 22, thereby increasing the flow rate of the ink entering the ink flow gap 19.

[0030] Preferably, the guide strip 22 is provided with a slope surface 23 at one end close to the ink flow gap 19 of the ink regulator 2 to facilitate the flow of ink toward the ink flow gap 19 .

[0031] Preferably, a third step 24 is provided on the inner wall of the cavity of the ink cartridge 1 , and the third step 24 abuts against an end surface of the ink regulator 2 away from the opening of the ink cartridge 1 .

[0032] Preferably, the water diversion core 3 is a cylindrical core with conical ends.

[0033] When installing the present invention, first, the ink regulator 2 is abutted and fixed at the opening of the ink cartridge 1. Subsequently, one end of the water guide core 3 is inserted into the first flow channel 10 in the ink regulator 2, wherein the first step 13 provided on the outer wall of the water guide core 3 abuts the second step 14 provided on the inner wall of the first flow channel 10. Next, the pen tip 5 is engaged with the first limiting protrusion 7 in the first channel 6 of the limiting head 4 through the limiting groove 9, and then the limiting head 4 is fixed at the opening of the ink cartridge 1. At this time, one end of the water guide core 3 just abuts against one end of the pen tip 5. This installation process is simple and clear, facilitates the operation of the automated production line, and effectively improves the yield rate. More importantly, the two ends of the water guide core 3 are firmly connected to the pen tip 5 and the ink regulator 2, respectively, ensuring the stability of the structure and the uniform outflow of ink, thereby achieving an excellent writing effect.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, simple modifications and substitutions by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A straight liquid soft-tip pen, characterized in that: The invention comprises an ink cartridge, an ink regulator, a water guide core, a limit head, and a pen tip. The ink cartridge is a rod-shaped structure containing a cavity. The ink cartridge is provided with an opening. The limit head is provided at the opening of the ink cartridge. A first channel is provided in the limit head. The first channel is provided with a plurality of first limit protrusions and a second limit protrusion. Part of the pen tip is provided in the first channel, and the tip of the pen tip passes through the first channel. The pen tip is provided with a limit groove that cooperates with the first limit protrusion. The pen tip is engaged with the first limit protrusion in the first channel through the limit groove. The ink regulator is fixed in the cavity of the ink cartridge and is close to the opening of the ink cartridge. The ink regulator is close to the opening of the ink cartridge. One end of the ink regulator is located in the first channel and is plugged into the second limiting protrusion, the ink regulator is provided with a first flow channel running through the interior thereof, and the end of the first flow channel close to the limiting head is provided with a first groove, and one end of the nib is plugged into the first groove; the water guide core passes through the first flow channel, one end of the water guide core abuts against the end of the nib close to the first groove, and the other end extends into the ink cylinder, and the outer wall of the water guide core is provided with a first step, and correspondingly, the inner wall of the first flow channel is provided with a second step abutting against the first step for preventing the water guide core from shifting; the ink regulator is provided with an ink inlet part at the end away from the opening of the ink cylinder, and the part of the water guide core that passes through the first flow channel and extends into the ink cylinder extends into the ink inlet part.

2. A straight liquid soft-tip pen according to claim 1, characterized in that: The ink inlet portion is provided with a second flow channel, the second flow channel is communicated with the first flow channel, one end of the water guide core is located in the second flow channel, and the second flow channel is communicated with the ink cylinder.

3. A straight liquid soft-tip pen according to claim 2, characterized in that: An ink inlet is provided on the side wall of the ink inlet portion, and the ink inlet is connected with the ink cylinder and the side wall of the water guide core.

4. A straight liquid soft-tip pen as claimed in claim 3, characterized in that: The number of the ink inlets is two and they are arranged oppositely on two sides of the water guide core.

5. A straight liquid soft-tip pen as claimed in claim 1, characterized in that: The side wall of the ink regulator is provided with several layers of fins, and the side wall of the ink regulator is provided with an ink flow gap that penetrates the several layers of fins and the end of the ink regulator away from the ink cylinder opening. The end of the ink flow gap close to the pen tip is provided with an ink flow through hole that penetrates the side wall of the ink regulator, and the ink flow through hole is connected to the first flow channel.

6. A straight liquid soft-tip pen as claimed in claim 5, characterized in that: A third flow channel is opened on the side wall of the ink inlet portion, and the third flow channel is communicated with the ink flow gap.

7. A straight liquid soft-tip pen as claimed in claim 5, characterized in that: A guide strip is provided on the inner wall of the ink cartridge cavity. The guide strip extends from one end of the ink cartridge away from the opening to an ink flow gap close to the ink regulator.

8. A straight liquid soft-tip pen according to claim 7, characterized in that: An end of the guide strip close to the ink flow gap of the ink regulator is provided with a slope surface.

9. The straight liquid soft-tip pen according to claim 1, characterized in that: A third step is provided on the inner wall of the ink cartridge cavity, and the third step abuts against an end surface of the ink regulator away from the ink cartridge opening.

10. The straight liquid soft-tip pen according to claim 1, characterized in that: The water diversion core is a columnar core with two ends in a conical shape.