Direct-liquid type soft-head drawing pen
By using the snap-fit positioning of the annular groove and flange, and the conical guide surface, the problem of easy displacement and ink bleeding of the ink core in direct-liquid soft-tip drawing pens is solved, achieving stable positioning of the ink core and improving ink output.
Patent Information
- Application Number
- CN202520455761.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The ink cartridge of a traditional direct-liquid soft-tip drawing pen is prone to displacement when it is bumped, dropped, or shaken violently, which affects the ink dispensing effect, and the ink is prone to leaking out along the gap between the ink cartridge and the reservoir.
The water-guiding core is positioned axially by using a snap-fit positioning mechanism with an annular groove and an annular flange, combined with the guide cone surfaces at the tapered front and rear ends, and ink leakage is prevented by a tight contact fit.
It effectively prevents the ink core from shifting during use, ensuring ink output, preventing ink leakage, and improving writing stability and ink output reliability.
Smart Images
Figure CN223812450U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of writing instrument, concretely relates to a straight liquid type soft head drawing pen. BACKGROUND
[0002] The straight liquid type soft head drawing pen usually comprises a pen head, a pen head seat, an ink cartridge, a water reservoir, a water guide core and a ball, wherein the ink cartridge has an ink cavity for storing ink, the ball is movably arranged in the ink cavity, and the ball can be rolled by shaking the pen when the pen is not used for a long time to avoid ink deposition and ensure ink discharge effect; the water reservoir is inserted into the ink cartridge through the opening at the front end of the ink cartridge; the water guide core is arranged at the center hole of the water reservoir; the pen head is mounted on the pen head seat; the pen head seat and the opening at the front end of the ink cartridge are fixedly connected by insertion; the front end of the water guide core is connected with the rear end of the pen head; and the rear end of the water guide core is arranged in the ink cavity and in contact with the ink.
[0003] In the structure of the conventional straight liquid type soft head drawing pen, in order to ensure ink discharge effect and prevent ink from flowing out of the gap between the water guide core and the water reservoir, and to prevent the water guide core from being displaced and ensure smooth ink discharge, the water guide core is usually inserted into the center hole of the water reservoir by tight fitting. However, the connection between the water guide core and the water reservoir has some defects. For example, when the pen is collided, dropped or shaken, the water guide core may be displaced, which affects the ink discharge effect of the pen. When the pen is shaken, the ball may damage the rear end of the water guide core, which also affects the ink discharge effect. SUMMARY
[0004] The utility model provides a straight liquid type soft head drawing pen, and the water guide core has better positioning effect.
[0005] The straight liquid type soft head drawing pen comprises a pen head, a pen head seat, an ink cartridge, a water reservoir and a water guide core, the ink cartridge is provided with an ink cavity, the water reservoir is inserted into the ink cartridge, the center of the water reservoir comprises a through hole, the water guide core is inserted into the through hole of the water reservoir, the pen head is mounted on the pen head seat, the pen head seat is connected to the front end of the ink cartridge, the front end of the water guide core is connected with the pen head, the water guide core is provided with an annular groove, the water reservoir / pen head seat is provided with an annular flange which is connected with the annular groove of the water guide core to form clamping positioning cooperation, when the annular groove and the annular flange are clamped, the positioning cooperation is realized through the axial end face, the water guide core has better positioning effect, and the water guide core cannot be axially displaced relative to the water reservoir, the water guide core and the through hole at least partially form close contact cooperation, which can prevent the ink in the ink cavity from flowing out of the gap between the water guide core and the through hole, and ensure good ink discharge effect.
[0006] In the scheme that the annular flange is arranged on the pen head seat, the annular groove is arranged at the front end of the water guide core, the front end of the pen head seat is provided with a first insertion hole, the rear end of the pen head seat is provided with a second insertion hole, the rear end of the first insertion hole and the front end of the second insertion hole are connected, the annular flange is arranged at the connection of the first insertion hole and the second insertion hole, the rear end of the pen head is inserted and fixed in the first insertion hole, and the front end of the water guide core is inserted and fixed in the second insertion hole. The structure is simple, the processing and forming of the pen head seat are facilitated, and the insertion and installation between the pen head, the water guide core and the pen head seat are facilitated.
[0007] Further, the front end of the water reservoir has a cylindrical insertion part, and the front end opening of the through hole is located on the insertion part. The insertion part is matched and inserted and fixed with the second insertion hole to realize the connection and positioning of the pen head seat and the water reservoir, avoid the relative displacement between the pen head seat and the water reservoir, ensure good ink output effect, and also ensure the reliable connection of the pen head and the water guide core.
[0008] In the scheme that the annular flange is arranged on the water reservoir, the annular flange is arranged at the front end / rear end of the through hole, and the annular groove is correspondingly arranged at the front end / rear end of the water guide core.
[0009] In the insertion process, since the inner diameter of the annular flange is smaller than the diameter of the water guide core, the annular groove and the annular flange are correspondingly arranged at the front end / rear end of the water guide core and the through hole. Only a small part of the front end / rear end of the water guide core is slightly extruded and deformed during the insertion of the water guide core into the through hole. The assembly is simpler, and the water guide core is not easy to be damaged during assembly.
[0010] For example, when the annular groove and the annular flange are correspondingly arranged at the front end of the water guide core and the through hole, the water guide core can be inserted and installed into the through hole from the rear end of the through hole. Only a small part of the water guide core located in front of the annular groove is extruded and deformed by the annular flange when the water guide core passes through the inner hole of the annular flange. Similarly, when the annular groove and the annular flange are correspondingly arranged at the rear end of the water guide core and the through hole, the water guide core can be inserted and installed into the through hole from the front end of the through hole. Only a small part of the water guide core located behind the annular groove is extruded and deformed by the annular flange when the water guide core passes through the inner hole of the annular flange. This is conducive to maintaining the stability of the overall form of the water guide core and preventing the water guide core from being damaged.
[0011] In one of the close contact and cooperation schemes of the water guide core and the through hole, the diameter of the water guide core is smaller than or equal to the hole diameter of the through hole, and the diameter of the water guide core after absorbing ink is greater than the hole diameter of the through hole.
[0012] The diameter of the water guide core in the initial state (i.e. without absorbing ink) is equal to or slightly smaller than the hole diameter of the through hole, the resistance between the water guide core and the inner wall of the through hole is small, and the water guide core can be conveniently inserted into the through hole, when the water guide core absorbs ink and expands, the diameter of the water guide core is larger than the hole diameter of the through hole, so that the water guide core and the inner wall of the through hole can be closely contacted and matched, the gap between the water guide core and the through hole can be filled, and the effect of preventing ink seepage is achieved. It should be noted that the water guide core can be made of conventional materials, and the conventional material water guide core will also expand after absorbing ink.
[0013] In another close contact and matching scheme of the water guide core and the through hole, the through hole locally comprises a narrow section with a hole diameter smaller than the diameter of the water guide core, and the narrow section and the water guide core constitute a close plug-in matching, the water guide core can be inserted into the through hole by local extrusion deformation, and when the water guide core and the narrow section are plug-in matched, the close contact and matching between the two can prevent ink seepage.
[0014] In the utility model, the water guide core has a conical front end and a conical rear end, the front end / rear end of the annular flange has a guide cone surface matched with the conical front end / conical rear end of the water guide core for guiding. When the guide cone surface is arranged at the front end of the annular flange, the water guide core can be inserted in the rearward direction, and the conical rear end of the water guide core can be matched with the guide cone surface of the annular flange to guide the rear end of the water guide core to be inserted into the inner hole of the annular flange. Conversely, when the guide cone surface is arranged at the rear end of the annular flange, the water guide core can be inserted in the forward direction, and the conical front end of the water guide core can be matched with the guide cone surface of the annular flange to guide the front end of the water guide core to be inserted into the inner hole of the annular flange. Through the guiding matching of the guide cone surface and the conical front end / conical rear end, the alignment and deformation effect of the water guide core during insertion is improved, and the assembly of the water guide core is facilitated.
[0015] Further, a rolling ball is arranged in the ink cavity, the rear end of the water guide core is located inside the through hole, the rear end of the water reservoir has a cylindrical extension, an annular gap is formed between the extension and the inner wall of the ink cavity, the rear end opening of the through hole is located on the extension, a plurality of side windows connected with the annular gap are arranged on the extension in the circumferential direction, and the rolling ball can prevent the ink in the ink cavity from precipitating when the pen is not used for a long time. Since the rear end of the water guide core is located inside the through hole, the rolling ball will not touch the water guide core when the pen is shaken, and the rear end of the water guide core can be prevented from being damaged due to collision with the rolling ball. The arrangement of the side windows can improve the contact area between the rear end of the water guide core and the ink, and improve the ink absorption effect. It should be noted that the arrangement of the conical front end and the conical rear end can respectively improve the contact effect between the front end of the water guide core and the pen head and between the rear end of the water guide core and the ink in the ink cavity, thereby improving the ink supply effect.
[0016] The utility model discloses a beneficial effect is: through the clamping cooperation of annular groove and annular flange, realized the positioning of water leading core in the axial direction, effectively prevented the displacement of water leading core in the process of using pen, especially when violent shaking or falling, collision, guarantee good ink effect. In addition, the close contact cooperation between water leading core and through -hole prevents the seepage of ink along the gap between water leading core and through -hole, avoids the excessive ink when writing. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the explosion map of the utility model embodiment;
[0018] Figure 2 It is the structure diagram of the water storage device of the utility model embodiment;
[0019] Figure 3 It is the structure diagram of water leading core of the utility model embodiment;
[0020] Figure 4 It is the partial sectional view of the utility model embodiment;
[0021] Figure 5 It is Figure 4 the partial enlarged view of Figure 1 ;
[0022] Figure 6 It is Figure 4 the partial enlarged view of Figure 2 ;
[0023] Figure 7 It is the partial sectional view of another embodiment of the utility model;
[0024] Figure 8 It is Figure 7 the partial enlarged view of
[0025] Figure 9 It is the structure diagram of water leading core of another embodiment of the utility model. DETAILED DESCRIPTION
[0026] The utility model discloses a direct liquid type soft head drawing pen's implementation such as Figures 1 to 6The pen head 1, the pen head seat 2, the ink barrel 3, the water reservoir 4 and the water guide core 5 are shown: the ink cavity 31 is arranged in the ink barrel 3, the water reservoir 4 is inserted into the ink barrel 3, the center of the water reservoir 4 comprises a through hole 41, the water guide core 5 is inserted into the through hole 41 of the water reservoir 4, the pen head 1 is installed on the pen head seat 2, the pen head seat 2 is connected to the front end of the ink barrel 3, the front end of the water guide core 5 is connected to the pen head 1, the water guide core 5 is provided with an annular groove 61, the pen head seat 2 is provided with an annular flange 62 which is connected to the annular groove 61 of the water guide core 5 to form a clamping positioning cooperation, when the annular groove 61 and the annular flange 62 are clamped, the positioning effect of the water guide core 5 is better, the axial displacement of the water guide core 5 relative to the water reservoir 4 is prevented, the water guide core 5 and the through hole 41 at least partially form a close contact cooperation, the ink in the ink cavity 31 is prevented from flowing out through the gap between the water guide core 5 and the through hole 41, and good ink discharge effect is ensured.
[0027] In the embodiment, the annular groove 61 is arranged at the front end of the water guide core 5, the front end of the pen head seat 2 is provided with a first insertion hole 21, the rear end of the pen head seat 2 is provided with a second insertion hole 22, the rear end of the first insertion hole 21 is connected to the front end of the second insertion hole 22, the annular flange 62 is arranged at the connection between the first insertion hole 21 and the second insertion hole 22, the rear end of the pen head 1 is inserted and fixed in the first insertion hole 21, and the front end of the water guide core 5 is inserted and fixed in the second insertion hole 22, so that the structure is simple, the processing and forming of the pen head seat 2 are facilitated, and the insertion and installation between the pen head 1, the water guide core 5 and the pen head seat 2 are facilitated.
[0028] The front end of the water reservoir 4 has a cylindrical insertion part 42, the front end opening of the through hole 41 is located on the insertion part 42, the insertion part 42 is inserted and fixed in cooperation with the second insertion hole 22, the connection and positioning of the pen head seat 2 and the water reservoir 4 are realized, the relative displacement between the pen head seat 2 and the water reservoir 4 is prevented, good ink discharge effect is ensured, and reliable connection of the pen head 1 and the water guide core 5 is also ensured.
[0029] In the embodiment, the rear end of the through hole 41 comprises a narrow section 411 with a hole diameter slightly smaller than the diameter of the water guide core 5, the narrow section 411 and the water guide core 5 form a close insertion cooperation, the water guide core 5 can be inserted into the through hole 41 through local extrusion deformation, and the effect of preventing ink seepage is achieved due to the close contact cooperation between the water guide core 5 and the narrow section 411 when they are inserted and cooperated.
[0030] In this embodiment, since the annular groove 61 is located at the front end of the water guide core 5, it is more suitable for the forward insertion assembly method. Therefore, the water guide core 5 has a conical front end 501 and a conical rear end 502. The rear end of the annular flange 62 has a guide cone surface 621 that guides the conical front end 501 of the water guide core 5. The conical front end 501 of the water guide core 5 can cooperate with the guide cone surface 621 of the annular flange 62 to guide the front end of the water guide core 5 into the inner hole of the annular flange 62, thereby realizing the connection between the water guide core 5 and the pen tip holder 2.
[0031] During assembly, the front end of the ink core 5 can be connected to the pen tip holder 2 first, and then the rear end of the ink core 5 can be inserted into the through hole 41 of the water reservoir 4. The pen tip holder 2 and the water reservoir 4 can be connected together, and finally the whole assembly can be inserted into the front end of the ink cartridge 3. Alternatively, the pen tip holder 2 and the water reservoir 4 can be connected first, and the ink core 5 can be inserted from the rear end of the water reservoir 4 to the front end of the water reservoir 4 and the pen tip holder 2 for installation.
[0032] A rolling ball 7 is rolled in the ink cavity 31. The rear end of the water-guiding core 5 is located inside the through hole 41. The rear end of the water reservoir 4 has a cylindrical extension 43. An annular gap is formed between the extension 43 and the inner wall of the ink cavity 31. The rear end opening of the through hole 41 is located on the extension 43. Several side windows 431 connected to the annular gap are circumferentially distributed on the extension 43. The rolling ball 7 can prevent ink from settling in the ink cavity 31. Since the rear end of the water-guiding core 5 is located inside the through hole 41, the rolling ball 7 will not touch the water-guiding core 5 when the pen is shaken, thus preventing damage to the rear end of the water-guiding core 5 due to collision with the rolling ball 7. The annular gap and the rolling ball 7 have a certain positioning and matching effect. When the pen is writing upright or tilted, the rolling ball 7 is not likely to block the rear end opening of the through hole 41, ensuring a good ink output effect. The side windows 431 can increase the contact area between the rear end of the water-guiding core 5 and the ink, improving the ink absorption effect. It should be noted that the tapered front end 501 and tapered rear end 502 can also improve the contact effect between the front end of the ink core 5 and the pen tip 1, and between the rear end of the ink core 5 and the ink, thereby improving the ink supply effect.
[0033] In another embodiment, such as Figures 7 to 9 As shown, unlike the above embodiment, the annular flange 62 is located at the front end of the through hole 41, that is, on the water reservoir 4, and the annular groove 61 is located at the front end of the water inlet core 5.
[0034] In another embodiment, the through hole 41 does not include the narrow segment 411, the diameter of the water-guiding core 5 is less than or equal to the aperture of the through hole 41, and the diameter of the water-guiding core 5 after ink absorption and expansion is greater than the aperture of the through hole 41.
[0035] The diameter of the water guiding core 5 in the initial state (i.e. without ink absorption) is equal to or slightly smaller than the hole diameter of the through hole 41, the resistance between the water guiding core 5 and the inner wall of the through hole 41 is small, and the water guiding core 5 can be conveniently inserted into the through hole 41, when the water guiding core 5 is expanded after absorbing ink, the diameter of the water guiding core 5 is greater than the hole diameter of the through hole 41, so that the water guiding core 5 and the inner wall of the through hole 41 can be tightly contacted and matched, the gap between the water guiding core 5 and the through hole 41 can be filled, and the effect of preventing ink seepage is achieved. It should be noted that the water guiding core 5 can be made of conventional materials, and the water guiding core 5 made of conventional materials will also expand after absorbing ink.
[0036] Since the annular groove 61 and the annular flange 62 are correspondingly arranged at the front ends of the water guiding core 5 and the through hole 41, the water guiding core 5 can be inserted and arranged in the through hole 41 from the rear end of the through hole 41 to the front end, and when the water guiding core 5 passes through the inner hole of the annular flange 62, only a small part of the water guiding core 5 located in front of the annular groove 61 is deformed by the extrusion of the annular flange 62, which is beneficial to keep the stability of the overall shape of the water guiding core 5 and prevent the water guiding core 5 from being damaged.
[0037] Of course, in other embodiments, the annular groove 61 and the annular flange 62 can also be correspondingly arranged at the rear ends of the water guiding core 5 and the through hole 41, and in the same way, during assembly, the water guiding core 5 can be inserted and arranged in the through hole 41 from the front end of the through hole 41 to the rear end, and when the water guiding core 5 passes through the inner hole of the annular flange 62, only a small part of the water guiding core 5 located behind the annular groove 61 is deformed by the extrusion of the annular flange 62, which facilitates the insertion of the water guiding core 5.
[0038] During assembly, the pen head seat 2 and the water reservoir 4 can be connected first, and then the water guiding core 5 is inserted and arranged in the through hole 41 and the pen head seat 2 in sequence, or the water guiding core 5 and the water reservoir 4 can be connected first, and then the pen head seat 2 is connected.
[0039] The rear end of the annular flange 62 has a guide cone surface 621 matched with the tapered front end 501 of the water guiding core 5 for guiding, and the tapered front end 501 of the water guiding core 5 can be matched with the guide cone surface 621 of the annular flange 62 to guide the front end of the water guiding core 5 to be inserted into the inner hole of the annular flange 62, so as to realize the connection between the water guiding core 5 and the pen head seat 2.
[0040] In the embodiment in which the annular groove 61 and the annular flange 62 are correspondingly arranged at the rear ends of the water guiding core 5 and the through hole 41, the guide cone surface 621 is arranged at the front end of the annular flange 62, and during assembly, the water guiding core 5 is inserted and arranged in the through hole 41 from the rear end to the front end.
[0041] It should be noted that the diameter of the water guiding core 5 in the utility model refers to the maximum diameter of the water guiding core 5.
[0042] The above embodiment is only one of preferred specific embodiments of the present application, and common changes and replacements made by those skilled in the art within the technical scheme of the present application are included in the protection scope of the present application.
Claims
1. A liquid direct soft tip drawing pen, comprising a pen tip, a pen tip seat, an ink cartridge, a water reservoir, a water guide core, an ink cavity is arranged in the ink cartridge, the water reservoir is inserted into the ink cartridge, the center of the water reservoir comprises a through hole, the water guide core is inserted into the through hole of the water reservoir, the pen tip is installed on the pen tip seat, the pen tip seat is connected to the front end of the ink cartridge, the front end of the water guide core is connected with the pen tip, characterized in that: The water guide core is provided with an annular groove, and the water reservoir / pen head base is provided with an annular flange which is in clamping positioning cooperation with the annular groove of the water guide core.
2. The liquid direct drawing pen according to claim 1, characterized in that: The annular groove is arranged at the front end of the water guide core, the front end of the pen head base is provided with a first insertion hole, the rear end of the pen head base is provided with a second insertion hole, the rear end of the first insertion hole and the front end of the second insertion hole are connected, the annular flange is arranged at the connection of the first insertion hole and the second insertion hole, the rear end of the pen head is inserted and fixed in the first insertion hole, and the front end of the water guide core is inserted and fixed in the second insertion hole.
3. The liquid direct drawing pen according to claim 2, characterized in that: The front end of the water reservoir has a cylindrical insertion part, and the front end opening of the through hole is located on the insertion part.
4. The liquid direct drawing pen according to claim 1, characterized in that: The annular flange is arranged at the front end / rear end of the through hole, and the annular groove is correspondingly arranged at the front end / rear end of the water guide core.
5. The liquid direct application soft tip brush of claim 1, wherein: The diameter of the water guide core is less than or equal to the hole diameter of the through hole, and the diameter of the water guide core after ink absorption expansion is greater than the hole diameter of the through hole.
6. The liquid direct application soft tip brush of claim 1, wherein: The through hole partially includes a narrow section with a hole diameter less than the diameter of the water guide core, and the narrow section and the water guide core form a close insertion fit.
7. The liquid direct application soft tip brush of claim 1, wherein: The water guide core has a tapered front end and a tapered rear end, and the front end / rear end of the annular flange has a guide cone surface which is in cooperation and guidance with the tapered front end / tapered rear end of the water guide core.
8. The liquid direct application soft tip brush of claim 1, wherein: A rolling ball is arranged in the ink cavity, the rear end of the water guide core is located inside the through hole, the rear end of the water reservoir has a cylindrical extension part, an annular gap is formed between the extension part and the inner wall of the ink cavity, the rear end opening of the through hole is located on the extension part, and a plurality of side windows connected with the annular gap are arranged on the extension part in the circumferential direction.