Direct-liquid type soft-head pen

Abstract

The utility model particularly provides a direct liquid type soft head pen, a water leading core part comprises a first core part and a second core part which are connected along a first direction A. The diameter of the first core part is smaller than that of the second core part, and a first abutting step is formed between the first core part and the second core part. An abutting limiting structure which is matched with the first abutting step in an abutting mode and limits the ink guiding core part to move into the ink cylinder is arranged in the first ink flowing channel, and the pen point body part penetrates through the limiting head and is partially limited in the limiting head. The water diversion core part penetrates into the first ink flowing channel until the first abutting step abuts against the abutting limiting structure, namely, the water diversion core part is installed in place, assembling is convenient and fast, in-place accuracy is achieved, and the requirement of automatic production is met; meanwhile, the abutting limiting structure is arranged in the first ink flowing channel, it can be guaranteed that the flux of ink entering the first ink flowing channel is sufficient, and the problem of ink shortage is not prone to occurring in the writing process.

Description

Technical Field

[0001] This utility model relates to the field of pen technology, specifically to a direct-liquid soft-tip pen. Background Technology

[0002] The tip of a direct-liquid soft-tip pen is made of polymer materials such as plastic and fiber. The tip of a direct-liquid soft-tip drawing pen is elastic; when writing, the friction between the pen tip and the paper creates vibrations, which draws ink out from the internal conduit, producing smooth lines. It is often used for drawing and sketching.

[0003] In conventional direct-liquid soft-tip pens, the water reservoir and ink core are usually integrated and tightly fitted together. During the production and assembly process, this type of fitting structure makes it easy for the ink core to be over-installed or under-installed, making position adjustment difficult, resulting in a low assembly yield rate and problems such as poor contact, uneven ink output, and inability to write. This is not conducive to the needs of automated production. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a direct-liquid soft-tip pen.

[0005] The technical solution adopted by this utility model is as follows: A direct-liquid soft-tip pen includes a core assembly, an ink cartridge assembly, and a limiting head connected to one end of the ink cartridge assembly. The ink cartridge assembly includes an ink cartridge and a water reservoir. The water reservoir is located inside the ink cartridge, and a through first ink flow channel is formed inside the water reservoir.

[0006] The core assembly includes a water-guiding core and a pen tip body that are connected and communicate with each other along the first direction A. The end of the water-guiding core away from the pen tip body extends into the ink cartridge through the first ink flow channel.

[0007] The water-guiding core includes a first core and a second core connected along the first direction A. The diameter of the first core is smaller than the diameter of the second core, and a first abutting step is formed between the two.

[0008] The first ink flow channel is provided with an abutting and limiting structure that abuts and cooperates with the first abutting step and restricts the movement of the ink core into the ink cartridge. The main body of the pen tip passes through the limiting head and is partially limited within the limiting head.

[0009] With this design, the water-guiding core is installed in place when it abuts against the first contact step and the contact limiting structure after it enters the first ink flow channel. This makes assembly convenient and accurate, suitable for automated production. At the same time, the contact limiting structure is located inside the first ink flow channel, which ensures that the ink flow into the first ink flow channel is sufficient, and the problem of ink interruption is not likely to occur during writing.

[0010] The water-guiding core and the pen tip body can be connected as a single molded part, or they can be separate structures. In this case, the connection between the two is that the end of the water-guiding core and the tail end of the pen tip body are tightly fitted together.

[0011] The pen tip body portion is partially confined within the limiting head in either a form where the pen tip body portion is tightly fitted to the limiting head, or a form where the pen tip body portion abuts against the through hole inside the limiting head.

[0012] Preferably, the first ink flow channel is located at the center of the water reservoir and includes a first channel and a second channel connected to each other along the first direction A. The diameter of the first channel is smaller than the diameter of the second channel. The abutment limiting structure includes a second limiting step formed between the first channel and the second channel and abutting and cooperating with the first abutment step.

[0013] This design allows the second limiting step formed between the first and second channels to engage with the first limiting step, thereby improving the stability of the connection between the water intake core and the water storage device.

[0014] The second limiting step is located near the limiting head, which makes the length of the first core greater than that of the second core, ensuring connection stability and ease of assembly while reducing the material consumption in the manufacturing of the water intake core.

[0015] Preferably, the second core portion is clearance-fitted with the second channel, and at least a portion of the first core portion close to the second core portion is clearance-fitted with the first channel.

[0016] This design ensures smooth insertion of the water-guiding core into the first ink flow channel, preventing issues such as difficulty in insertion due to excessive resistance, damage to the water-guiding core, and difficulty in controlling the insertion position.

[0017] Preferably, the first channel includes a fastening hole and a guide hole connected along the first direction A. The fastening hole is fastened to the first core, and the guide hole is clearance-fitted to the first core.

[0018] This design ensures smooth insertion of the water-guiding core into the first ink channel, while also providing a fastening hole at the end of the first core as it passes through the first channel. This improves the stability of the connection between the water-guiding core and the water reservoir, making it less likely for the water-guiding core to fall out of the water reservoir.

[0019] Preferably, the upper end of the guide hole has a larger diameter along the first direction A and a guide slope is formed on its hole wall.

[0020] With this setting, as the water core passes through the guide hole, the guide slope acts as a guide for the water core, making it easier for it to pass through the fastening hole.

[0021] Preferably, the core assembly is provided with a positioning groove at a position below the first abutting step, and the limiting head is provided with a positioning protrusion whose shape is adapted to the positioning groove. The positioning protrusion is connected to the positioning groove and the core assembly / pen tip body is fastened to the limiting head.

[0022] Specifically, "below" refers to the direction away from the ink cartridge. The positioning groove located around the core assembly and the positioning protrusion on the limiting head form a tight fit, ensuring a stable and reliable connection between the core assembly / pen tip body and the limiting head. Simultaneously, the positioning groove provides an automatic positioning marker for the core assembly / pen tip body, preventing over-insertion or compression that could damage the core assembly. Furthermore, the positioning groove and the first limiting step form a double positioning marker, further improving the accuracy of the core assembly's positioning and resulting in a high degree of automation.

[0023] Preferably, the water reservoir is provided with at least two extension plates that surround the water inlet core and extend axially at one end near the ink cylinder, and each extension plate has an extension channel formed on its inner circumference that is fastened to the water inlet core.

[0024] This design further improves the stability of the connection between the water inlet core and the water reservoir, while ensuring the area of ​​the ink inlet.

[0025] Preferably, the length of the extension plate is greater than the length of the first ink flow channel that extends from the end of the water-conducting core near the ink cylinder.

[0026] This design allows the extension plate to protect the end of the water intake core.

[0027] Preferably, the water-guiding core and the pen tip body are separate structures, with one end of the water-guiding core pressed against and fixed to the tail end of the pen tip body.

[0028] Preferably, the core assembly is a one-piece molded part.

[0029] This design further reduces assembly steps and improves assembly convenience. Simply connect the limiting head to the water tank, and then pass the core component through the limiting head and the water tank in sequence to complete the installation.

[0030] The beneficial effects of this utility model are as follows: the water-guiding core is installed in place when it penetrates the first ink flow channel and abuts against the first abutting step and the abutting limiting structure. This makes assembly convenient and accurate, and is suitable for the needs of automated production. At the same time, the abutting limiting structure is set in the first ink flow channel, which can ensure that the ink flow into the first ink flow channel is sufficient and that the problem of ink interruption is not likely to occur during writing. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0032] Figure 1 This is a front sectional view of the overall structure of Embodiment 1 of this utility model;

[0033] Figure 2 This is a front sectional view of the structure in which the water reservoir, core assembly, and limiting head are assembled in Embodiment 1 of this utility model;

[0034] Figure 3 for Figure 2 Enlarged view of the structure at point B in the middle;

[0035] Figure 4 for Figure 2 Enlarged view of the structure at point C;

[0036] Figure 5 A front sectional view of the structure of the water storage device, core assembly, and limiting head in Embodiment 2 of this utility model;

[0037] Figure 6 for Figure 5 Enlarged view of the structure at point D;

[0038] Figure 7 This is a front sectional view of the core assembly in Embodiment 2 of this utility model;

[0039] In the diagram, 1 is the ink cartridge; 2 is the water reservoir; 3 is the water inlet core; 4 is the pen tip body; 5 is the limiting head; 21 is the first channel; 22 is the second channel; 23 is the second limiting step; 24 is the extension plate; 31 is the first core; 32 is the second core; 33 is the first abutting step; 34 is the positioning groove; 51 is the positioning protrusion; 211 is the fastening hole; 212 is the guide hole; and 2121 is the guide slope. Detailed Implementation

[0040] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0041] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0042] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0043] Example 1

[0044] like Figures 1 to 4 As shown in the illustration, a direct-liquid soft-tip pen, according to an embodiment of this utility model, includes a core assembly, an ink cartridge assembly, and a limiting head 5 connected to one end of the ink cartridge assembly. The ink cartridge assembly includes an ink cartridge 1 and a water reservoir 2. The water reservoir 2 is located inside the ink cartridge 1, and a through first ink flow channel is formed inside the water reservoir 2.

[0045] The core assembly includes a water-guiding core 3 and a pen tip body 4 that are connected and communicate with each other along the first direction A. The water-guiding core 3 and the pen tip body 4 are separate structures. One end of the water-guiding core 3 away from the pen tip body 4 extends into the ink cylinder 1 through the first ink flow channel, and the other end is pressed against and fixed to the tail end of the pen tip body 4.

[0046] The water-guiding core 3 includes a first core 31 and a second core 32 connected along the first direction A. The diameter of the first core 31 is smaller than the diameter of the second core 32, and a first abutting step 33 is formed between the two.

[0047] The first ink flow channel is provided with an abutting and limiting structure that abuts and cooperates with the first abutting step 33 and restricts the movement of the water-guiding core 3 into the ink cylinder 1. The pen tip body 4 passes through the limiting head 5 and is partially limited within the limiting head 5.

[0048] The first ink flow channel is located at the center of the water reservoir 2 and includes a first channel 21 and a second channel 22 connected along the first direction A. The diameter of the first channel 21 is smaller than the diameter of the second channel 22. The abutment limiting structure includes a second limiting step 23 formed between the first channel 21 and the second channel 22 and abutting and cooperating with the first abutment step 33.

[0049] The second core 32 is clearance-fitted with the second channel 22, and at least part of the first core 31 close to the second core 32 is clearance-fitted with the first channel 21.

[0050] The first channel 21 includes a fastening hole 211 and a guide hole 212 connected along the first direction A. The fastening hole 211 is fastened to the first core 31, and the guide hole 212 is clearance-fitted to the first core 31.

[0051] The upper end of the guide hole 212 has a larger diameter along the first direction A and forms a guide slope 2121 on its hole wall.

[0052] The core assembly has a positioning groove 34 circumferentially arranged below the first abutment step 33. The limiting head 5 is provided with a positioning protrusion 51 that matches the shape of the positioning groove 34. The positioning protrusion 51 is connected to the positioning groove 34 and makes the core assembly / pen tip body 4 and the limiting head 5 tightly fitted together.

[0053] The water reservoir 2 is provided with at least two extension plates 24 that surround the water core 3 and extend axially at one end near the ink cylinder 1. Each extension plate 24 has an extension channel 241 formed on its inner circumference that is fastened to the water core 3.

[0054] The length of the extension plate 24 is greater than the length of the first ink flow channel that extends from the end of the water-guiding core 3 near the ink cylinder 1.

[0055] The water-guiding core 3 and the pen tip body 4 are separate structures, with one end of the water-guiding core 3 pressed against and fixed to the tail end of the pen tip body 4.

[0056] In this embodiment, during assembly, the water inlet core 3 is first inserted into the water reservoir 2, then the limiting head 5 is connected to the water reservoir 2, and finally the pen tip body 4 is inserted into the limiting head 5 to complete the installation.

[0057] Example 2

[0058] like Figure 5 – Figure 7 The illustration shows a direct-liquid soft-tip pen in this embodiment. The difference between this embodiment and Embodiment 1 is that the water-guiding core 3 and the pen tip body 4 are an integral structure, and the core assembly is a one-piece molded part. This design further reduces assembly steps and improves assembly convenience. During assembly, the limiting head 5 is directly connected to the water reservoir 2, and then the core assembly is passed sequentially through the limiting head 5 and the water reservoir 2 to complete the installation.

[0059] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A direct-liquid soft-tip pen, comprising a core assembly, an ink cartridge assembly, and a limiting head (5) connected to one end of the ink cartridge assembly, wherein the ink cartridge assembly comprises an ink cartridge (1) and a reservoir (2), the reservoir (2) being located inside the ink cartridge (1) and having a through first ink flow channel formed inside the reservoir (2), The core assembly includes, along a first direction (A), a water-guiding core (3) and a pen tip body (4) that are connected and communicate with each other. One end of the water-guiding core (3) away from the pen tip body (4) extends into the ink cartridge (1) through a first ink flow channel. Its characteristic is that: The water-guiding core (3) includes a first core (31) and a second core (32) connected along the first direction (A), wherein the diameter of the first core (31) is smaller than the diameter of the second core (32) and a first abutting step (33) is formed between the two. The first ink channel is provided with an abutting and limiting structure that abuts and cooperates with the first abutting step (33) and restricts the movement of the water-guiding core (3) into the ink cylinder (1). The pen tip body (4) passes through the limiting head (5) and is partially limited within the limiting head (5).

2. The direct-liquid soft-tip pen according to claim 1, characterized in that: The first ink flow channel is located at the center of the water reservoir (2) and includes a first channel (21) and a second channel (22) connected along the first direction (A). The diameter of the first channel (21) is smaller than the diameter of the second channel (22). The abutting limiting structure includes a second limiting step (23) formed between the first channel (21) and the second channel (22) and abutting and cooperating with the first abutting step (33).

3. A direct-liquid soft-tip pen according to claim 2, characterized in that: The second core (32) is clearance-fitted with the second channel (22), and the first core (31) at least partially close to the second core (32) is clearance-fitted with the first channel (21).

4. A direct-liquid soft-tip pen according to claim 3, characterized in that: The first channel (21) includes a fastening hole (211) and a guide hole (212) connected along the first direction (A). The fastening hole (211) is fastened to the first core (31), and the guide hole (212) is clearance-fitted to the first core (31).

5. A direct-liquid soft-tip pen according to claim 4, characterized in that: The upper end of the guide hole (212) increases in diameter along the first direction (A) and forms a guide slope (2121) on its hole wall.

6. A direct-liquid soft-tip pen according to claim 1, characterized in that: The core assembly is provided with a positioning groove (34) at a position below the first abutting step (33). The limiting head (5) is provided with a positioning protrusion (51) that matches the shape of the positioning groove (34). The positioning protrusion (51) is connected to the positioning groove (34) and the core assembly / pen tip body (4) is tightly fitted with the limiting head (5).

7. A direct-liquid soft-tip pen according to claim 1, characterized in that: The water reservoir (2) is provided with at least two extension plates (24) that surround the water core (3) and extend axially at one end near the ink cylinder (1). Each extension plate (24) has an extension channel (241) formed on its inner circumference that is fastened to the water core (3).

8. A direct-liquid soft-tip pen according to claim 7, characterized in that: The length of the extension plate (24) is greater than the length of the first ink flow channel that extends from the end of the water core (3) near the ink cylinder (1).

9. A direct-liquid soft-tip pen according to any one of claims 1-8, characterized in that: The water-guiding core (3) and the pen tip body (4) are separate structures, with one end of the water-guiding core (3) pressed against and fixed to the tail end of the pen tip body (4).

10. A direct-liquid soft-tip pen according to any one of claims 1-8, characterized in that: The core assembly is a one-piece molded part.

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