Direct liquid type writing tool

Abstract

The utility model discloses a direct liquid type writing tool and relates to the technical field of writing tools, the direct liquid type writing tool comprises an ink storage pen container, a water storage device, a pen point limiting cover, a water diversion core and a pen core installed on the pen point limiting cover, the ink storage pen container is connected with the pen point limiting cover, the water storage device is installed in the ink storage pen container, and the water diversion core is installed in the water storage device; the pen core abuts against the water outlet end of the water guide core, an abutting shoulder face is arranged in a core hole of the water storage device, an abutting limiting part is arranged on the peripheral face of the water guide core, and the abutting limiting part abuts against the abutting shoulder face to limit upward movement of the water guide core. The ink guide core is stable in limiting and reliable in contact with the refill, and ink is discharged smoothly.

Description

Technical Field

[0001] This application relates to the field of writing instrument technology, specifically to a direct-liquid writing instrument. Background Technology

[0002] Direct-liquid writing instruments are a type of writing instrument that uses a core and a reservoir to dispense ink. When writing, the friction and vibration between the pen tip and the paper cause ink to enter the core. Traditional direct-liquid writing instruments rely on the part of the core that extends out of the reservoir to draw ink. If the core is dropped, the extended part may break or the pen tip may separate from the core, resulting in no ink being dispensed and affecting the lifespan of the writing instrument.

[0003] Currently, direct-liquid writing instruments with non-extended ink cores have appeared on the market. These instruments utilize a method where the end of the ink core abuts against a limiting hole to prevent movement of the ink core during vibration, thus preventing separation of the pen tip from the ink core. For example, CN220447528U discloses a quick-installation direct-liquid soft-tip drawing pen anti-dislodgement structure. One end of the ink core 3 passes through the through hole 21 of the water reservoir 2 and is fixed within the limiting hole 713 to prevent the ink core 3 from dislodging away from the pen tip assembly, causing poor contact between the ink core 3 and the pen tip assembly. Because the pointed section of the ink core 3 and the limiting hole 713 make a line-surface contact, the force is concentrated. Prolonged stress at the line contact point can easily cause deformation that is difficult to recover from, thus reducing the stability of the limiting hole and indirectly affecting the reliability of the connection between the ink core 3 and the pen tip assembly. Furthermore, during installation, excessive force pushing the ink core 3 can easily cause breakage at the line contact point, affecting installation efficiency. Additionally, the end of the ink core being squeezed can also affect ink-drawing efficiency. Utility Model Content

[0004] In view of this, this application provides a direct-liquid writing instrument to solve the technical problem that existing direct-liquid pens are prone to ink flow problems due to the low stability of the ink core.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A direct-liquid writing instrument includes an ink reservoir, a water reservoir, a pen tip limiting cap, a water inlet core, and a pen refill mounted on the pen tip limiting cap. The ink reservoir is connected to the pen tip limiting cap. The water reservoir is installed inside the ink reservoir, and the water inlet core is installed inside the water reservoir. The pen refill and the water outlet end of the water inlet core abut against each other. The core hole of the water reservoir has an abutting shoulder surface, and the outer peripheral surface of the water inlet core has an abutting limiting part. The abutting limiting part abuts against the abutting shoulder surface to restrict the upward movement of the water inlet core.

[0007] Furthermore, the abutment shoulder surface is formed by setting the core hole as a stepped hole, and the abutment limiting part is formed by setting the water guide core as a stepped shaft.

[0008] Furthermore, both ends of the water-guiding core are conical tips, and the upper conical tip located at the lower end of the main core body mates with the conical hole of the pen refill.

[0009] Furthermore, the pen tip limiting cover includes an outer shell and multiple ribs distributed in a ring along the inner wall of the outer shell. The multiple ribs form a pen refill mounting hole for installing the pen refill. The air return chamber of the water reservoir is connected to the outside through the channel between adjacent ribs.

[0010] Furthermore, the outer circumference of the pen refill has a limiting ring groove, and the retaining protrusion of the rib is inserted into the limiting ring groove.

[0011] Furthermore, the pen refill has a guide cone surface on the end near the ink core.

[0012] Furthermore, it also includes a pen cap, the inner wall of which has a sealing ring protrusion that fits tightly against the pen tip limiting cap.

[0013] Furthermore, the water reservoir includes a water reservoir body and an end plate. The end plate is connected to the end of the water reservoir body away from the pen refill via a connecting cylinder. The end plate has two arc-shaped portions that fit the inner wall of the ink reservoir. The core hole includes a first core hole and a second core hole located inside the water reservoir body. The second core hole extends from the water reservoir body into the connecting cylinder. The second core hole communicates with the ink inlet port provided on the end plate and the ink inlet side port provided on the side wall of the connecting cylinder.

[0014] Furthermore, the support column connecting the end plate and the main body of the water tank is located on the side of the connecting cylinder.

[0015] As can be seen from the above technical solution, the advantages of this utility model are:

[0016] 1. In this application, during installation, the annular abutment limiting part of the water-conducting core abuts against the abutment shoulder surface located on the inner wall of the water reservoir. The surface-to-surface contact limiting improves the limiting reliability of the water-conducting core, thereby improving the connection stability between the water-conducting core and the pen refill. Furthermore, the end of the water-conducting core near the ink reservoir is not subjected to force, and is guided and supported by the second core hole, making it less prone to breakage. Moreover, the end of the water-conducting core in contact with the ink is not squeezed, resulting in high ink absorption efficiency.

[0017] 2. The multi-ribbed structure of the pen tip limiting cap in this application allows for rapid air supply to the water reservoir the moment the pen cap is opened, ensuring reliable ink dispensing.

[0018] 3. In this application, the interlocking structure between the pen refill and the reinforcing rib is used to prevent the pen refill from moving, making the contact between the pen refill and the ink core more reliable.

[0019] 4. In this application, by utilizing the sealing ring protrusion inside the pen cap, after the pen cap is connected to the pen body, air can be more reliably prevented from entering the ink reservoir, the internal and external pressure of the ink reservoir is balanced to stop ink dispensing, and the evaporation of ink in the pen refill can be reduced. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] Figure 1 This is a schematic diagram of the installation of a water intake core in the prior art.

[0022] Figure 2 This is a schematic diagram of the overall structure of this application.

[0023] Figure 3 This is a schematic diagram of the internal structure of this application. Figure 1 .

[0024] Figure 4 This is a schematic diagram of the internal structure of this application. Figure 2 .

[0025] Figure 5 This is a schematic diagram of the water intake core of this application. Figure 1 .

[0026] Figure 6 This is a schematic diagram of the water intake core of this application. Figure 2 .

[0027] Figure 7 This is a schematic diagram of the external structure of the water storage device of this application.

[0028] Figure 8 This is a schematic diagram of the internal structure of the water storage device of this application.

[0029] Figure 9 This is a side view of the pen tip limiting cap of this application.

[0030] Figure 10 This is a schematic diagram of the pen tip limiting cap of this application.

[0031] Explanation of reference numerals in the attached drawings: 1-Ink reservoir; 2-Water reservoir; 21-Water reservoir body; 211-First core hole; 212-Second core hole; 213-Abutting shoulder surface; 22-End plate; 23-Support column; 24-Connecting cylinder; 25-Ink inlet port; 26-Ink inlet side opening; 3-Pen tip limiting cap; 31-Rib; 311-Clamping protrusion; 4-Water guide core; 41-Main core body; 42-Small diameter part; 43-Conical tip; 44-Abutting limiting part; 5-Pen refill; 51-Limiting ring groove; 52-Guide outer conical surface; 53-Conical hole; 6-Pen cap; 61-Sealing ring protrusion. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0033] like Figure 1 As shown, in the prior art, the water-drawing core 3 is installed by passing one end of the water-drawing core 3 through the through hole 21 of the water reservoir 2 and fixing it in the limiting hole 713 to prevent the water-drawing core 3 from coming out away from the pen tip assembly, causing poor contact between the water-drawing core 3 and the pen tip assembly. However, since the pointed cone section of the water-drawing core 3 and the limiting hole 713 make a line-surface contact, the force is concentrated. The line contact position is prone to deformation that is not easy to recover after a long time of force, which reduces the stability of the limiting and indirectly affects the connection reliability between the water-drawing core 3 and the pen tip assembly. Moreover, when the pushing force of the water-drawing core 3 is too large during installation, the line contact position is prone to breakage when the force is too large, which affects the installation efficiency. In addition, the end of the water-drawing core is also affected by the compression, which also affects the ink-drawing efficiency.

[0034] refer to Figures 2 to 10 ,like Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a direct-liquid writing instrument, including a pen cap 6, an ink reservoir 1, a water reservoir 2, a pen tip limiting cap 3, a water-guiding core 4, and a pen refill 5 installed on the pen tip limiting cap 3. The ink reservoir 1 is connected to the pen tip limiting cap 3. The water reservoir 2 is installed inside the ink reservoir 1, and the water-guiding core 4 is installed inside the water reservoir 2. The core hole of the water reservoir 2 has an abutment shoulder surface 213, and the outer peripheral surface of the water-guiding core 4 has an abutment limiting part 44. The abutment limiting part 44 abuts against the abutment shoulder surface 213 to limit the upward movement of the water-guiding core 4 (the direction away from the pen refill 5 is upward movement). The contact increases the limiting force and reduces the limiting deformation, making the limiting of the ink core 4 reliable. The ink outlet end of the pen refill 5 and the ink core 4 abut against each other. When the pen cap 6 is closed, the pen cap 6 and the ink reservoir 1 can be separated and connected using the existing snap-fit ​​and snap-slot structure. The inner wall of the pen cap 6 is provided with a sealing ring protrusion 61 that fits tightly with the pen tip limiting cover 3. After the pen cap 6 is closed, it can more reliably prevent air from entering the ink reservoir 1. The internal and external pressure of the ink reservoir 1 is balanced to stop the ink from flowing, and it can reduce the evaporation of ink in the pen refill 5. The pen refill 5 is a soft pen refill, and the ink core 4 is made of an elastic material that can guide ink.

[0035] In this application, the abutment shoulder surface 213 is formed by setting the core hole as a stepped hole, and the abutment limiting part 44 is formed by setting the water guide core 4 as a stepped shaft. The stepped hole / stepped shaft can be set to two, three, or four levels to form one, two, or three abutment shoulder surfaces 213 / abutment limiting parts 44 according to actual needs.

[0036] Preferably, in this application, the core hole of the water reservoir 2 has an abutment shoulder surface 213, and the water inlet core 4 has an abutment limiting part 44, which satisfies the limiting function while simplifying the structure manufacturing.

[0037] In this application, such as Figure 5 As shown, one structure of the water-guiding core 4 is as follows: the water-guiding core 4 includes a main core body 41 with the largest diameter. A small-diameter portion 42 is connected to each end of the main core body 41. The small-diameter portion 42, which does not contact the pen refill 5, is the water-guiding end of the water-guiding core 4 and is the upper end of the water-guiding core 4. The diameter of the small-diameter portion 42 is smaller than the diameter of the main core body 41. The diameter difference between the main core body 41 and the small-diameter portion 42 forms a shoulder-shaped abutment and limiting portion 44 on the main core body 41. The end of the small-diameter portion 42 is a conical tip 43. The water-guiding core 4 has two conical tips 43 at both ends. The conical tips 43 enable the water-guiding core 4 to have a large working area at both ends, which makes the ink absorption and dispensing speed fast and the ink dispensing of the pen refill 5 smooth and stable. The small diameter part 42 that contacts the pen refill 5 makes the end of the water-guiding core 4 that contacts the pen refill 5 more easily deformed than the main core part 41 when it is squeezed. The necking setting will reserve a certain amount of deformation space to prevent the water-guiding core 4 from being tightly fitted with the core hole of the water reservoir 2 after being squeezed, which would affect the ink delivery efficiency.

[0038] In this application, such as Figure 6 As shown, another structure of the ink-drawing core 4 is as follows: The ink-drawing core 4 includes a main core body 41 with the largest diameter. The end of the main core body 41 away from the pen refill 5 is connected to a small diameter part 42. The diameter of the small diameter part 42 is smaller than the diameter of the main core body 41. The diameter difference between the main core body 41 and the small diameter part 42 forms a shoulder-shaped abutment and limiting part 44 on the main core body 41. The end of the small diameter part 42 and the other end of the main core body 41 are both tapered tips 43. The tapered tips 43 enable the ink-drawing end of the ink-drawing core 4 to have a large working area, which makes the ink absorption speed fast.

[0039] like Figure 3 , Figure 4 and Figure 8As shown, the core hole of the water reservoir 2 includes a first core hole 211 and a second core hole 212 with successively decreasing diameters. The connection between the first core hole 211 and the second core hole 212 forms an abutment shoulder surface 213. The second core hole 212 communicates with the inner cavity of the ink reservoir 1. The main core part 41 cooperates with the first core hole 211 to guide and limit the installation of the water-guiding core 4, so as to prevent the water-guiding core 4 from breaking during the installation process. The abutment limiting part 44 abuts against the abutment shoulder surface 213 of the first core hole 211 to prevent the water-guiding core 4 from being inserted further. The surface contact is used to increase the bearing pressure, thereby improving the limiting stability of the water-guiding core 4. The small diameter part 42 located in the second core hole 212 will not be squeezed, so as to achieve high ink absorption efficiency.

[0040] In this application, the cone tip 43 located at the lower end of the ink core 4 cooperates with the conical hole 53 of the pen core 5 to ensure that the ink can reliably enter the pen core 5 and make the ink flow continuous and smooth.

[0041] like Figure 7 and Figure 8 As shown, the water reservoir 2 includes a water reservoir body 21 and an end plate 22. The structure of the water reservoir body 21 is existing technology. The end plate 22 is connected to the end of the water reservoir body 21 away from the pen refill 5 via a connecting cylinder 24. The end plate 22 has two symmetrically arranged arc-shaped portions that fit the inner wall of the ink reservoir 1. The arc-shaped portions guide the end plate 22 by fitting against the ink reservoir 1 and can also play a certain role in flow obstruction to prevent ink from flowing too quickly. The second core hole 212 extends from the water reservoir body 21 into the connecting cylinder 24, which can reduce the height of the connecting cylinder 24 and reduce the use of consumables. The end plate 22 is provided with an ink inlet port 25, and the connecting cylinder... The side wall of 24 is provided with an ink inlet side opening 26. The small diameter portion 42 located in the second core hole 212 extends beyond the ink inlet side opening 26, and the corresponding cone tip 43 is all located in front of the ink inlet port 25. The ink inlet side opening 26 and the ink inlet port 25 cooperate to enable the direct liquid writing instrument to quickly complete ink drawing from the moment it is assembled. There is a gap between the cone tip 43 and the end face of the ink inlet port 25. With this installation form, the water drawing core 4 will not affect the ink inlet diameter of the ink inlet port 25, so that the ink drawing is smooth. In addition, the small diameter portion 42 located in the second core hole 212 can all come into contact with the ink, resulting in high ink absorption efficiency. Through structural improvements, the ink drawing efficiency is high and the ink output is smoother.

[0042] In this application, the second core hole 212 is fitted with the corresponding small diameter part 42 with a clearance, so that the ink can enter the water inlet core 4 better.

[0043] In this application, the support column 23 connecting the end plate 22 and the water reservoir body 21 is located on the side of the connecting cylinder 24. By using the support column 23, the strength of the end plate 22 can be improved, preventing the end plate 22 from easily deforming under stress during installation.

[0044] like Figure 3 , Figure 9and Figure 10 As shown, the pen tip limiting cover 3 includes an outer shell and multiple ribs 31 distributed in a ring along the inner wall of the outer shell. The ribs 31 form pen refill mounting holes for mounting the pen refill 5. The air return chamber of the water reservoir 2 is connected to the outside through channels between adjacent ribs 31. Compared to existing pen tip limiting covers 3 which have only one air intake channel, this application has higher air intake efficiency, resulting in higher ink drawing efficiency and faster ink dispensing.

[0045] In this application, the outer peripheral surface of the pen refill 5 has a limiting annular groove 51, and the retaining protrusion 311 of the rib 31 is inserted into the limiting annular groove 51. The engagement of the retaining protrusion 311 with the limiting annular groove 51 can prevent the pen refill 5 from moving and separating from the ink-conducting core 4 when it falls or vibrates. The retaining protrusion 311 and the abutting limiting part form a two-end compression, so that the pen refill 5 and the ink-conducting core 4 are in reliable contact and the ink flow is smooth.

[0046] In this application, the pen refill 5 has a guide outer cone surface 52 on the end near the water inlet core 4. The guide outer cone surface 52 allows the pen refill 5 to be smoothly inserted into the pen tip limiting cap 3 and the water reservoir 2 in sequence during installation.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A direct-liquid writing instrument, comprising an ink reservoir (1), a water reservoir (2), a pen tip retaining cap (3), a water inlet core (4), and a pen refill (5) mounted on the pen tip retaining cap (3), wherein the ink reservoir (1) is connected to the pen tip retaining cap (3), the water reservoir (2) is installed inside the ink reservoir (1), the water inlet core (4) is installed inside the water reservoir (2), and the pen refill (5) abuts against the water outlet end of the water inlet core (4), characterized in that, The water reservoir (2) has an abutting shoulder surface (213) inside the core hole, and the water inlet core (4) has an abutting limiting part (44) on its outer peripheral surface. The abutting limiting part (44) abuts against the abutting shoulder surface (213) to restrict the water inlet core (4) from moving upward. The pen tip limiting cover (3) includes a shell and multiple ribs (31) distributed in a ring on the inner wall of the shell. The pen tip (5) has a limiting ring groove (51) on its outer peripheral surface. The locking protrusion (311) of the rib (31) is inserted into the limiting ring groove (51).

2. The direct-liquid writing instrument according to claim 1, characterized in that, The abutting shoulder surface (213) is formed by setting the core hole as a stepped hole, and the abutting limiting part (44) is formed by setting the water-guiding core (4) as a stepped shaft.

3. The direct-liquid writing instrument according to claim 1, characterized in that, Both ends of the water-guiding core (4) are conical tips (43), and the conical tip (43) located at the lower end of the water-guiding core (4) is matched with the conical hole (53) of the pen refill (5).

4. The direct-liquid writing instrument according to claim 1, characterized in that, A pen refill mounting hole is formed between the multiple ribs (31) for mounting the pen refill (5), and the air return chamber of the water reservoir (2) is connected to the outside through the channel between adjacent ribs (31).

5. The direct-liquid writing instrument according to claim 4, characterized in that, The pen refill (5) has a guide cone surface (52) on one end near the water core (4).

6. The direct-liquid writing instrument according to claim 1, characterized in that, It also includes a pen cap (6), on the inner wall of which is a sealing ring protrusion (61) that fits tightly against the pen tip limiting cap (3).

7. The direct-liquid writing instrument according to claim 1, characterized in that, The water reservoir (2) includes a water reservoir body (21) and an end plate (22). The end plate (22) is connected to the end of the water reservoir body (21) away from the pen refill (5) via a connecting tube (24). The end plate (22) has two arc-shaped portions that are adapted to the inner wall of the ink reservoir (1). The core hole includes a first core hole (211) and a second core hole (212) located in the water reservoir body (21). The second core hole (212) extends into the connecting tube (24). The second core hole (212) communicates with the ink inlet port (25) provided on the end plate (22) and the ink inlet side port (26) provided on the side wall of the connecting tube (24).

8. The direct-liquid writing instrument according to claim 7, characterized in that, The support column (23) connecting the end plate (22) and the water reservoir body (21) is located on the side of the connecting cylinder (24).

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