Direct liquid type writing tool

Abstract

The utility model belongs to the field of writing tools, and provides a direct liquid type writing tool which comprises a pen holding part capable of being connected with a pen shell, a first cavity and a second cavity which are communicated with each other are formed in the pen holding part, a water storage device is arranged in the first cavity, and a pen point is connected with the water storage device and extends out of the first cavity; a guide pipe is arranged in the second cavity, and the guide pipe and the water storage device are coaxially arranged; a guide part and a connecting part are formed at the end part of the ink bag tube, and an included angle is formed between the guide part and the connecting part. Compared with the prior art, the writing tool has the advantages that the connecting part is tightly assembled on the guide pipe, so that the writing tool normally realizes a writing function, the ink bag pipe and the pen holding part are detachably mounted, and the replacement of the ink bag pipe ensures the continuous use of the writing tool; and not only is the waste of other undamaged materials in use effectively avoided, but also the overall use cost of consumers is reduced, and meanwhile, the convenience brought by the consumers in the use process is also improved.

Description

Technical Field

[0001] The utility model belongs to the field of writing tools, and in particular relates to a direct liquid writing tool. Background Art

[0002] At present, there are more and more direct liquid series writing instruments on the market. Their smoothness and durability have made them gradually develop into the main writing tool and are deeply loved by consumers.

[0003] The currently disclosed Chinese patent CN220447528U is a quick-installation straight liquid soft-tip painting pen anti-falling-out structure, which mainly limits the axial movement of the water reservoir to ensure the convenience of assembly of the straight liquid soft-tip painting pen, while making the water reservoir and the pen head assembly not easy to fall out, thereby improving the service life of the product. However, from the embodiments of the specification and the attached Figure 1 With attached Figure 2 It can be learned that a pen shell is installed on the outside of the ink cartridge. As for the pen grip part used to install the nib body and the water reservoir, the ink cartridge and the pen grip part are integrally formed. That is to say, after the user has used up the ink in the ink cartridge of the painting pen, the ink cartridge cannot be disassembled and replaced, and a new painting pen must be used to continue writing. This not only causes a waste of other undamaged materials, but also increases the overall cost of use for consumers. It is also not conducive to improving the convenience of customers during use. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a direct liquid writing tool.

[0005] The utility model solves the technical problem by adopting a technical solution of providing a direct liquid writing tool, including an ink bag tube, a water reservoir and a pen head, and the writing tool also includes:

[0006] A pen grip portion that can be connected to a pen case, wherein a first chamber and a second chamber that are interconnected are formed in the pen grip portion, wherein the water reservoir is disposed in the first chamber, and the pen tip is connected to the water reservoir and extends out of the first chamber; a guide tube is disposed in the second chamber, and the guide tube is disposed coaxially with the water reservoir;

[0007] The end of the ink bag tube is formed with a guide portion and a connection portion, and the guide portion and the connection portion are arranged at an angle;

[0008] When the ink bag tube approaches the pen holding part along its axial direction, the connecting part can extend into the second chamber, and when the outer wall of the ink bag tube moves and clings to the inner wall of the second chamber, the connecting part is guided to fit tightly on the guide tube.

[0009] In the above-mentioned direct liquid writing tool, a plurality of limiting plates distributed in a ring shape are formed on the inner wall of the second chamber, and a guiding inclined surface is formed at the opening end of each limiting plate close to the second chamber;

[0010] When the connecting portion extends into the second chamber, the guiding inclined surface is used to guide the inner wall of the connecting portion to be tightly fitted onto the guiding tube, and the limiting plate abuts against the outer wall of the connecting portion.

[0011] In the above-mentioned direct liquid writing tool, a relief groove is formed at the end of the guiding tube close to the ink sac tube, and the relief groove is used to reduce the contact area between the guiding tube and the connecting portion.

[0012] In the above-mentioned direct liquid writing tool, an installation block is further connected to the end of the pen-holding portion away from the ink sac tube, and the end of the water storage device and the pen tip are both connected in the installation block and are in mutual movable abutment.

[0013] In the above-mentioned direct liquid writing tool, it further includes:

[0014] A pen cap, which can be movably sleeved on the pen-holding portion;

[0015] An airtight sleeve, which is connected in the pen cap, and the airtight sleeve is movably sleeved and abuts tightly against the installation block to seal the pen tip;

[0016] An elastic member, which is placed along the axis of the pen cap, one end of the elastic member is connected to the airtight sleeve, and the other end is connected to the pen cap;

[0017] When the airtight sleeve is movably sleeved on the installation block, the elastic member can make the airtight sleeve continuously abut tightly against the installation block due to the extrusion force of the pen cap along the direction of the ink sac tube.

[0018] In the above-mentioned direct liquid writing tool, an arc-shaped guiding surface is formed on the outer wall of the installation block, and a locking inclined surface is formed on the inner wall of the airtight sleeve, and the locking inclined surface is movably abutted against the arc-shaped guiding surface.

[0019] In the above-mentioned direct liquid writing tool, a limiting block is further formed on the pen-holding portion, and the pen cap is movably sleeved on the pen-holding portion and is movably abutted against the limiting block.

[0020] In the above-mentioned direct liquid writing tool, a plurality of stepped blocks distributed in a ring shape are provided in the pen cap, and a limiting cavity is formed by the plurality of stepped blocks, and the elastic member is sleeved on the airtight sleeve and is arranged in the limiting cavity with the airtight sleeve.

[0021] In the above-mentioned direct liquid writing tool, the following are further provided on the water storage device:

[0022] An ink flow channel, one end of which is connected to the pen tip and the other end is connected to the guiding tube, and a water guiding core is arranged in the ink flow channel;

[0023] A limiting part is formed at the end of the water storage tube away from the pen tip, and a limiting groove is arranged on the limiting part, and the diameter of the limiting groove is smaller than the diameter of the water guiding core to limit the displacement of the water guiding core;

[0024] An ink guiding groove is arranged on the limiting part and connects the ink flow channel and the limiting groove to increase the speed of the ink reaching the pen tip from the guiding core.

[0025] In the above direct liquid writing tool, the following are further arranged on the water storage device:

[0026] An ink flow channel, one end of which is connected to the pen tip and the other end is connected to the ink sac tube, and a water guiding core is arranged in the ink flow channel;

[0027] A limiting part is formed at the end of the water storage tube away from the pen tip, penetrates through the guiding tube and extends into the ink sac tube, and a limiting groove is arranged on the limiting part, and the diameter of the limiting groove is smaller than the diameter of the water guiding core to limit the displacement of the water guiding core;

[0028] An ink guiding groove is arranged on the limiting part and connects the ink flow channel and the limiting groove to increase the speed of the ink reaching the pen tip from the guiding core.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] (1) Through the cooperation of the connecting part and the guiding part of the direct liquid writing tool of the utility model, the ink sac tube can be accurately and tightly fitted on the guiding tube. While ensuring the normal writing function of the writing tool, the detachable installation between the ink sac tube and the pen-holding part is realized. After the ink in the ink sac tube is used up, by directly disassembling the ink sac tube and assembling a new ink sac tube, the continuous use of the writing tool can be ensured, which not only effectively avoids the waste of other undamaged materials in use, but also reduces the overall use cost of consumers, and at the same time improves the convenience brought to customers during the use process.

[0031] (2) By the airtight sleeve pre-contacting and pressing against the installation block in advance, as the pen cap is continuously sleeved on the pen-holding part along its axial direction, and then using the contraction force generated when the elastic part is squeezed, the airtight sleeve is continuously and stably pressed on the installation block, greatly improving the sealing effect of the airtight sleeve on the pen tip.

[0032] (3) Extend the ink flow channel and the limiting part in the water storage device into the ink sac tube to ensure that the ink in the ink sac tube directly wets the refill, effectively avoiding the blockage phenomenon caused by the thick and tensile colored grinding liquid in the guiding tube, and providing a guarantee for the refill to discharge ink for normal writing operations. Brief Description of the Drawings

[0033] Figure 1 is an exploded view between the pen cap and the pen-holding part;

[0034] Figure 2 is Figure 1 a cross-sectional view when the pen cap is sleeved on the pen-holding part;

[0035] Figure 3 is a left view of the pen-holding part;

[0036] Figure 4 is a perspective view of the water storage device;

[0037] Figure 5 is a schematic structural view of the water storage device extending into the ink sac tube;

[0038] Figure 6 is when the present application uses Figure 5 a schematic cross-sectional structural view of the water storage device shown;

[0039] Figure 7 is an installation structural view of the airtight sleeve and the elastic member in the pen cap.

[0040] In the figures, 1. Ink sac tube; 10. Guiding part; 11. Connecting part; 12. Pressing block; 13. Ink sac tail plug;

[0041] 2. Water storage device; 20. Ink flow channel; 21. Water guiding core; 22. Limiting part; 23. Limiting groove; 24. Ink guiding groove;

[0042] 3. Pen tip;

[0043] 4. Pen-holding part; 40. First chamber; 41. Second chamber; 410. Guiding tube; 410a. Relief groove; 411. Limiting plate; 411a. Guiding inclined surface; 42. Mounting block; 420. Arc-shaped guiding surface; 43. Limiting block;

[0044] 50. Pen cap; 500. Step block; 500a. Limiting cavity; 51. Airtight sleeve; 510. Locking inclined surface; 52. Elastic member. Detailed Description of the Preferred Embodiments

[0045] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0046] As Figures 1 to 7As shown in the figure, a direct liquid writing tool of the present utility model includes an ink sac tube 1, a water reservoir 2 and a pen tip 3. Among them, the writing tool further includes: a pen-holding part 4 that can be connected to a pen case. A first chamber 40 and a second chamber 41 that communicate with each other are formed in the pen-holding part 4. The water reservoir 2 is arranged in the first chamber 40. The pen tip 3 is connected to the water reservoir 2 and extends outside the first chamber 40. A guiding tube 410 is arranged in the second chamber 41. The guiding tube 410 is arranged coaxially with the water reservoir 2. An guiding part 10 and a connecting part 11 are formed at the end of the ink sac tube 1. The guiding part 10 and the connecting part 11 are arranged at an angle. When the ink sac tube 1 approaches the pen-holding part 4 along its axis direction, the connecting part 11 can extend into the second chamber 41. When the outer wall of the ink sac tube 1 is movably attached to the inner wall of the second chamber 41, the connecting part 11 is guided to be tightly fitted on the guiding tube 410.

[0047] During the assembly process of the writing tool, since the ink sac tube 1 and the pen-holding part 4 in the prior art are integrally formed, only the pen case needs to be sleeved on the ink sac tube 1 and connected to the pen-holding part 4. However, this method cannot replace the ink in the ink sac tube 1 after it is used up. Therefore, in this solution, the ink sac tube 1 and the pen-holding part 4 are detachably connected. Specifically, as Figures 1 to 3 shown, a guiding tube 410 is formed inside the pen-holding part 4. The axis lines of the guiding tube 410, the pen-holding part 4 and the water reservoir 2 are all on the same straight line to ensure that after the ink sac tube 1 is installed, the ink can smoothly flow through the guiding tube 410 into the water reservoir 2. During the installation process, the guiding part 10 arranged obliquely guides the connecting part 11 to smoothly extend into the second chamber 41, effectively avoiding damage to the connecting part 11 caused by collision during installation, and at the same time ensuring the smoothness and stability during installation. When the connecting part 11 enters the second chamber 41, the outer wall of the ink sac tube 1 is then movably attached to the inner wall of the second chamber 41. By using the movable fit between the two, it is ensured that the connecting part 11 and the guiding tube 410 are accurately on the same axis line, and further ensured that the connecting part 11 is tightly fitted on the guiding disc as the ink sac tube 1 is inserted, finally completing the connection between the ink sac tube 1 and the pen-holding part 4. The overall structure is relatively simple. While ensuring the normal writing function of the writing tool, the detachable installation between the ink sac tube 1 and the pen-holding part 4 is realized. That is, after the ink in the ink sac tube 1 is used up, by directly disassembling the ink sac tube 1 and repeating the above installation steps for the new ink sac tube 1, the sustainable use of the writing tool can be ensured, effectively avoiding waste in the use of other undamaged materials, reducing the overall use cost of consumers, and at the same time improving the convenience brought to customers during use.

[0048] Preferably, an interference fit method is adopted between the connecting part 11 and the guiding tube 410 in this solution to ensure that the ink sac tube 1 can be in a stable posture when connected to the pen-holding part 4.

[0049] The inner wall of the second chamber 41 is formed with a plurality of limiting plates 411 distributed in a ring shape. Each limiting plate 411 is formed with a guiding inclined surface 411a near the opening end of the second chamber 41. When the connecting portion 11 extends into the second chamber 41, the guiding inclined surface 411a is used to guide the inner wall of the connecting portion 11 to be tightly fitted onto the guiding tube 410, and the limiting plate 411 abuts against the outer wall of the connecting portion 11.

[0050] Furthermore, in this solution, the first chamber 40, the second chamber 41, and the connecting portion 11 are all designed to be cylindrical. Therefore, a plurality of limiting plates 411 are distributed in a ring shape in the second chamber 41. As Figure 2 shown in Figure 3 During the installation process of the ink sac tube 1, as the connecting portion 11 extends into the second chamber 41, even if the ink sac tube 1 is still in an inclined posture as a whole, the guiding inclined surface 411a can effectively guide the connecting portion 11 to adjust its position along between the limiting plate 411 and the guiding tube 410. Furthermore, when the connecting portion 11 and the guiding tube 410 are placed coaxially, the tight fitting operation between the two can be completed. At the same time, when the connecting portion 11 is in the Figure 2 position shown, the limiting plate 411 can abut against the outer wall of the connecting portion 11 (i.e., the connecting portion 11 is clamped between the limiting plate 411 and the guiding tube 410), greatly improving the fluency and stability of the assembly operation of this structure.

[0051] Preferably, continuing to refer to Figure 3 , in this solution, the end of the guiding tube 410 close to the ink sac tube 1 is provided with two relief grooves 410a. The relief grooves 410a effectively reduce the overall contact area between the guiding tube 410 and the connecting portion 11. On the basis of ensuring stable tight fitting between the two, it also provides guarantee for the fluency and convenience of subsequent disassembly of the ink sac tube 1, effectively avoiding damage during disassembly due to jamming between the ink sac tube 1 and the guiding tube 410.

[0052] The end of the pen-holding portion 4 far from the ink sac tube 1 is also connected with a mounting block 42. The end of the water storage device 2 and the pen tip 3 are both connected in the mounting block 42 and are in mutual movable abutment.

[0053] As Figure 2 shown, for the installation of the water storage device 2 and the pen tip 3, this solution adopts a mounting block 42 connected to the end of the pen-holding portion 4 far from the ink sac tube 1. Among them, the mounting block 42 and the pen-holding portion 4 can be connected by interference fit, screw fit or other methods. Before the mounting block 42 is installed, the water storage device 2 needs to be placed into the first chamber 40 in advance. When the mounting block 42 is connected to the opening end of the first chamber 40, it can also abut against the water storage device 2 to ensure that the pen tip 3 and the water storage device 2 can be accurately Figure 2The states shown are tightly connected to each other to ensure that the water storage device 2 supplies ink to the pen tip 3 in a timely manner, improving the smoothness of the writing tool during writing.

[0054] This solution also includes: a pen cap 50 that can be movably sleeved on the pen-holding part 4; an airtight sleeve 51 connected inside the pen cap 50, with the airtight sleeve 51 movably sleeved and pressed tightly against the mounting block 42 to seal the pen tip 3; an elastic member 52 placed along the axis of the pen cap 50, with one end of the elastic member 52 connected to the airtight sleeve 51 and the other end connected to the pen cap 50; when the airtight sleeve 51 is movably sleeved on the mounting block 42, the elastic member 52 can cause the airtight sleeve 51 to continuously press tightly against the mounting block 42 due to the squeezing force of the pen cap 50 along the direction of the ink sac tube 1.

[0055] In addition, this solution further improves the structure of the pen cap 50, such as Figure 2 and Figure 7 As shown, when the writing tool is not needed, the user can use the pen cap 50 to close the pen tip 3. Specifically, when the pen cap 50 is movably sleeved along the axis of the pen-holding part 4, the airtight sleeve 51 inside the pen cap 50 can be pre-movably sleeved on the mounting block 42 (here it means before the pen cap 50 reaches the designated position). As the pen cap 50 continues to be sleeved on the pen-holding part 4 along its axis, the contraction force generated when the elastic member 52 is squeezed leftward can continuously and stably press the airtight sleeve 51 tightly on the mounting block 42, greatly improving the sealing effect of the airtight sleeve 51 on the pen tip 3. Figure 2 On the outer wall of the mounting block 42, an arc-shaped guiding surface 420 is formed, and on the inner wall of the airtight sleeve 51, a locking inclined surface 510 is formed, with the locking inclined surface 510 movably pressing against the arc-shaped guiding surface 420.

[0056] Furthermore, as

[0057] shown, during the process of the pen cap 50 being movably sleeved on the pen-holding part 4, the locking inclined surface 510 on the inner wall of the airtight sleeve 51 can movably press against the arc-shaped guiding surface 420. Coupled with the continuous squeezing force exerted by the elastic member 52 on the airtight sleeve 51, the two fit more tightly, effectively preventing external air from infiltrating and causing the pen tip 3 to dry out. Figure 2 Inside the pen cap 50, there are several stepped blocks 500 distributed in a ring shape. The several stepped blocks 500 form a limiting cavity 500a, and the elastic member 52 is sleeved on the airtight sleeve 51 and is arranged in the limiting cavity 500a with the airtight sleeve 51.

[0058] Further, as

[0059] shown, Figure 7As shown, in the limiting cavity 500a formed by several stepped blocks 500, the airtight sleeve 51 and the elastic member 52 are in different stepped positions, so that one end of the elastic member 52 can tightly abut against the stepped outer wall of the airtight sleeve 51, and the other end can movably abut against the inner wall of the stepped block 500. The limiting cavity 500a ensures the coaxial arrangement of the elastic member 52 and the airtight sleeve 51, improving the overall stability of the pen cap 50 structure.

[0060] Preferably, a limiting block 43 is further formed on the pen-holding part 4 in this solution. It should be noted that during the process of the pen cap 50 movably sleeving on the pen-holding part 4, the airtight sleeve 51 in the pen cap 50 is pre-sleeved on the mounting block 42. As the pen cap 50 continues to move, the elastic member 52 begins to be squeezed and contracted. While the airtight sleeve 51 continuously abuts against the mounting block 42, the pen cap 50 abuts against the limiting block 43, and finally completes the clamping with the pen-holding part 4, providing convenience for the subsequent carrying of the whole writing tool.

[0061] The water storage device 2 is also provided with: an ink flow channel 20, one end of which is connected to the pen tip 3 and the other end is connected to the guide tube 410. An ink guiding core 21 is arranged in the ink flow channel 20; a limiting part 22 is formed at the end of the water storage tube far from the pen tip 3. A limiting groove 23 is arranged on the limiting part 22, and the diameter of the limiting groove 23 is smaller than the diameter of the ink guiding core 21 to limit the displacement of the ink guiding core 21; an ink guiding groove 24 is arranged on the limiting part 22 and connects the ink flow channel 20 and the limiting groove 23 to increase the speed of the ink reaching the pen tip 3 from the guiding core.

[0062] As Figures 2 to 4 shown, when the ink sac tube 1 is tightly fitted on the guide tube 410, the ink in the ink sac tube 1 can flow along the guide tube 410 into the ink flow channel 20, and then the ink is guided to the pen tip 3 at the other end through the ink guiding core 21 to ensure the normal writing operation of the writing tool; during this process, this solution uses the cooperation between the limiting groove 23 and the pen tip 3 to effectively ensure the stability of the ink guiding core 21 in the ink flow channel 20. The ink guiding grooves 24 are symmetrically arranged on both side walls of the limiting part 22, enabling the direct liquid writing tool to quickly realize the ink guiding function since assembly, ensuring the smoothness of the writing tool and meeting the usage requirements of customers. It should be noted that the other structures of the water storage device 2 in this solution are the same as those of the water storage device 2 in traditional writing tools in terms of structure and principle, and will not be elaborated here in detail.

[0063] Preferably, the water storage device in this solution can also be set as Figure 5 and Figure 6The structure shown, in which one end of the ink flow channel 20 is connected to the pen tip 3, and the other end is connected to the ink sac tube 1. A water guiding core 21 is arranged in the ink flow channel 20; a limiting part 22 is formed at the end of the water storage tube far from the pen tip 3, penetrates through the guiding tube and extends into the ink sac tube 1. A limiting groove 23 is arranged on the limiting part 22, and the diameter of the limiting groove 23 is smaller than the diameter of the water guiding core 21 to limit the displacement of the water guiding core 21; an ink guiding groove 24 is arranged on the limiting part 22 and connects the ink flow channel 20 and the limiting groove to increase the speed of the ink reaching the pen tip from the guiding core 21. Different from the structure of the above-mentioned water storage device 2, this structure directly penetrates the ink flow channel 20 and the limiting part 22 through the guiding tube and extends into the ink sac tube 1, so that the end of the water guiding core 21 far from the pen core is completely immersed in the ink in the ink sac tube 1. This design effectively avoids the blockage phenomenon caused by the thick and tensile colored ink in the guiding tube 410, providing a guarantee for the normal writing operation of the pen tip to discharge ink.

[0064] A pressing block 12 and an ink sac tail plug 13 are also arranged in the ink sac tube 1. The pressing block 12 allows the ink to be evenly discharged from the ink sac tube 1, so that the pen tip 3 can write smoothly; the ink sac tail plug 13 is detachably connected to the end of the ink sac tube 1 far from the pen-holding part 4 to prevent the pressing block 12 from detaching from the ink sac tube 1.

[0065] As Figure 1 And Figure 2 As shown, after adding the required ink into the ink sac tube 1, the ink sac tube 1 can be sealed through the ink sac tail plug 13, effectively avoiding the entry of external dust or impurities into the ink sac tube 1 and prolonging the service life of the writing tool; the pressing block 12 can be an iron block or an iron ball, used to realize the function of shaking the ink, ensuring that the ink can be evenly discharged from the ink sac tube 1 to the guiding tube 410, making the pen tip smoother during writing.

[0066] It should be noted that the elastic member 52 in this solution can be a compression spring, a return spring or other elastic devices.

[0067] It should be noted that all the directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indicators will also change accordingly.

[0068] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0069] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0070] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. A direct liquid writing tool, comprising an ink sac tube, a water reservoir, and a pen tip, characterized in that, The writing instrument also includes: A pen grip portion that can be connected to a pen case, wherein a first chamber and a second chamber that are interconnected are formed in the pen grip portion, wherein the water reservoir is disposed in the first chamber, and the pen tip is connected to the water reservoir and extends out of the first chamber; a guide tube is disposed in the second chamber, and the guide tube is disposed coaxially with the water reservoir; The end of the ink bag tube is formed with a guide portion and a connection portion, and the guide portion and the connection portion are arranged at an angle; When the ink bag tube approaches the pen holding part along its axial direction, the connecting part can extend into the second chamber, and when the outer wall of the ink bag tube moves and clings to the inner wall of the second chamber, the connecting part is guided to fit tightly on the guide tube.

2. The direct liquid writing tool according to claim 1, characterized in that, The inner wall of the second chamber is formed with a plurality of limiting plates distributed in a ring shape, and each limiting plate is formed with a guiding inclined surface at an opening end close to the second chamber; When the connecting portion extends into the second chamber, the guiding slope is used to guide the inner wall of the connecting portion to be tightly fitted onto the guide tube, and the limiting plate is pressed against the outer wall of the connecting portion.

3. The direct liquid writing tool according to claim 1, characterized in that, The end of the guide tube close to the ink bag tube is provided with a clearance groove, and the clearance groove is used to reduce the contact area between the guide tube and the connecting part.

4. A direct liquid writing tool according to claim 1, characterized in that, The end of the pen holding portion away from the ink bag tube is also connected to a mounting block, and the end of the water reservoir and the pen head are both connected in the mounting block and movably abut against each other.

5. A direct liquid writing tool according to claim 4, characterized in that, Also includes: A pen cap, movably mounted on the pen grip; An airtight sleeve connected inside the pen cap, the airtight sleeve being movably mounted and pressed against the mounting block to seal the pen tip; An elastic member is placed along the axis direction of the pen cap, one end of the elastic member is connected to the airtight sleeve, and the other end is connected to the pen cap; When the airtight sleeve is movably mounted on the mounting block, the elastic member can be pressed against the mounting block continuously due to the squeezing force of the pen cap along the ink bag tube.

6. The direct liquid writing tool according to claim 5, characterized in that, An arc-shaped guide surface is formed on the outer wall of the mounting block, and a locking inclined surface is formed on the inner wall of the airtight sleeve. The locking inclined surface is movably pressed against the arc-shaped guide surface.

7. A direct liquid writing tool according to claim 5, characterized in that, A limiting block is also formed on the pen holding portion, and the pen cap is movably sleeved on the pen holding portion and movably pressed against the limiting block.

8. The direct liquid writing tool according to claim 5, characterized in that, A plurality of stepped blocks distributed in a ring shape are arranged in the pen cap, and a plurality of the stepped blocks form a limited position cavity. The elastic member is sleeved on the airtight sleeve and is arranged in the limited position cavity together with the airtight sleeve.

9. A direct liquid writing tool according to claim 1, characterized in that, The water reservoir is also provided with: An ink flow channel, one end of which is connected to the pen head, and the other end of which is connected to the guide tube, and a water guide core is arranged in the ink flow channel; A limiting portion is formed at the end of the water reservoir away from the pen tip, and a limiting groove is provided on the limiting portion, wherein the diameter of the limiting groove is smaller than the diameter of the water guide core, so as to limit the displacement of the water guide core; The ink guide groove is arranged on the limiting part and connects the ink flow channel and the limiting groove to increase the speed at which the ink reaches the pen tip from the guide core.

10. A direct liquid writing tool according to claim 1, characterized in that, The water reservoir is also provided with: An ink flow channel, one end of which is connected to the pen tip and the other end is connected to the ink sac tube, and a water guiding core is arranged in the ink flow channel; A limiting part is formed at the end of the water storage device far from the pen tip, penetrates through the guiding tube and extends into the ink sac tube, a limiting groove is arranged on the limiting part, and the diameter of the limiting groove is smaller than the diameter of the water guiding core to limit the displacement of the water guiding core; An ink guiding groove is arranged on the limiting part and connects the ink flow channel and the limiting groove to increase the speed of the ink reaching the pen tip from the guiding core.

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