Finger winding type finger pen integrating hose refill and pen body
By integrating the flexible pen tip with the pen body, the production challenge of hard, irregularly shaped pen tips was solved, achieving stable connection and low-cost production of the pen tip, thus improving writing accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-10
AI Technical Summary
The production process of hard, irregularly shaped refills for existing finger pens is difficult and costly, and the flexible refills are unstable in the small space, making them prone to ink leakage and ink breakage.
The pen features a design that integrates the flexible pen tip with the pen body. The pen tip is spirally coiled on the outer wall of the pen body and is stably connected through a corner two-way connector and a limiting groove. The pen tip and pen tip are connected at a large angle within a small space, and a flexible pen clip is set to prevent ink leakage.
It simplifies the manufacturing process, reduces production costs, and improves the stability and writing accuracy of the pen refill, avoiding ink leakage and ink breakage.
Smart Images
Figure CN223982320U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of finger pen technology, specifically to a finger pen with a flexible pen core integrated with the pen body. Background Technology
[0002] Existing finger pens already exist, all utilizing a single finger guide for multi-finger writing. They offer higher precision in pen control and ink pressure application, resulting in neater and more aesthetically pleasing handwriting. However, their refills are often irregularly shaped, such as spirals, L-shapes, or U-shapes, and the refill tubes were originally designed to be made of rigid materials. Currently, to produce the desired rigid tube shape, the only technological solutions are blow molding or secondary molding, both of which are relatively difficult and costly.
[0003] To address the aforementioned issues, the applicant proposed a design using flexible refill tubes. Flexible tubes can effectively overcome the manufacturing difficulties and high production costs associated with rigid, irregularly shaped refill tubes. However, adopting a flexible refill tube design presents numerous technical challenges. Taking the spiral refill of a finger-wrap pen as an example, because the flexible tube is spirally wound and the pen tip is located on the spiral's center line, achieving stable connections between components within a small space, preventing ink leakage during centrifugal de-cavitation after ink is poured into the refill, preventing ink interruptions during normal writing, positioning the spiral-shaped flexible tube, and ensuring smooth assembly and disassembly of the components are all implementation challenges that need to be addressed. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing finger pens by providing a finger-wrapping finger pen with a flexible pen core integrated with the pen body. By using a soft pen core tube and placing the pen core on the outer wall of the pen body, this solution not only solves the technical problem of producing spiral pen cores for finger-wrapping finger pens, but also reduces the difficulty of the finger pen manufacturing process, thereby reducing the overall production cost of the finger pen.
[0005] This utility model is achieved through the following technical solution:
[0006] This utility model provides a finger-wrap pen with a flexible pen tip integrated with the pen body, comprising a pen tip, a pen body, and a pen tip; one side of the pen body is provided with a finger hole for inserting a finger, and the pen tip is detachably sleeved on the pen body on the side opposite to the finger hole; a cavity is formed between the pen tip and the pen body, and the pen tip is located in the cavity and is installed and limited on the pen body; the pen tip includes a pen tip tube, a corner connector, and a pen tip, the pen tip tube is a flexible tube, and the corner connector connects the pen tip tube and the pen tip; the pen tip has a through hole for the pen tip to pass through, and the through hole coincides with the center line of the finger hole.
[0007] As a preferred embodiment of this utility model, the outer wall of the pen body is provided with an inlet groove and a spiral groove. The spiral groove is arranged around the outer wall of the pen body, the pen core tube is limited in the spiral groove, the first end of the spiral groove is connected to the inlet groove, and the corner two-way head is limited in the inlet groove.
[0008] As a preferred embodiment of this utility model, the inlet groove is provided with a limiting groove for limiting the corner two-way head. The limiting groove includes a first groove, a second groove and a third groove, which are respectively used to limit different parts of the corner two-way head.
[0009] As a preferred embodiment of this utility model, the inlet width of the spiral groove near the tail end is smaller than the outer diameter of the pen refill tube, and the tail depth of the spiral groove is slightly greater than the radius of the pen refill tube.
[0010] As a preferred embodiment of this utility model, the cross-section of the spiral groove can be any one of square, circular, or U-shaped.
[0011] As a preferred embodiment of this utility model, the corner two-way connector includes a first connecting post and a second connecting post. The first connecting post is connected to the pen refill tube, and the second connecting post is connected to the pen tip. There is an angle between the axes of the first connecting post and the second connecting post. The corner two-way connector has an oil passage that runs through the first connecting post and the second connecting post.
[0012] As a preferred embodiment of this utility model, the corner two-way connector includes a hose retainer, which is used to fix the pen refill tube sleeved on the first connecting post.
[0013] As a preferred embodiment of this utility model, the corner two-way head is provided with a first docking punch, and the first docking punch and the second connecting post are arranged coaxially opposite each other.
[0014] As a preferred embodiment of this utility model, the corner two-way head is further provided with a second docking punch, which is arranged at the end opposite to the first connecting post.
[0015] As a preferred embodiment of this utility model, a suitable flexible finger sleeve is provided inside the finger hole, and a pluggable pen cap is provided on the pen tip.
[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0017] The finger pen of this invention uses a soft pen core tube that can be coiled in a spiral groove on the outer wall of the pen body. During assembly, the pen core is inserted into the pen tip along with the pen body. This design makes the entire process of inserting the pen core easier. At the same time, by using a corner two-way connector, the angle of the pen core tube and the pen tip is deflected, which helps to reduce the bending amplitude of the pen core tube. This finger pen not only simplifies the manufacturing process but also reduces the overall production cost of the finger pen.
[0018] Among the many irregular pen refill designs, the production difficulty and cost of hard spiral pen refills are the highest. Once the production technology of spiral pen refills is mastered, the production technology of other irregular pen refill designs can be easily solved. For example, finger pens with L-shaped, S-shaped, and U-shaped refills can all be produced using this technology. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0020] Figure 1 This is a three-dimensional view of the finger-wrap pen in this utility model, in which the flexible pen tip and pen body are integrated;
[0021] Figure 2 This is a schematic diagram of the corner two-way head in this utility model;
[0022] Figure 3 This is a cross-sectional view of the finger pen in this utility model;
[0023] Figure 4 This is a schematic diagram of the pen body in this utility model;
[0024] Figure 5 This is a schematic diagram of the pen refill and pen body assembly in this utility model;
[0025] Figure 6 This is a schematic diagram of the pen tip in this utility model;
[0026] Figure 7 This is a schematic diagram of the limiting constriction section at the end of the spiral groove on the pen body in this utility model.
[0027] The attached diagram shows the markings and corresponding component names:
[0028] 1-Pen body, 2-Pen tip, 3-Pen refill tube, 4-Corner two-way connector, 41-First connecting post, 42-Second connecting post, 43-Hose retainer, 44-First docking punch, 45-Second docking punch, 5-Pen tip, 6-Pen cap, 7-Flexible finger sleeve, 81-Inlet groove, 82-Spiral groove, 821-Limiting constriction section, 83-First groove, 84-Second groove, 85-Third groove. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0031] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.
[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.
[0034] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.
[0035] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise explicitly specified.
[0036] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0038] Please refer to Figures 1 to 7 This application provides a finger-wrap pen with a flexible pen refill fused to a pen body 1, comprising a pen refill, a pen body 1, and a pen tip 2; a finger hole for inserting a finger is provided on one side of the pen body 1, and the pen tip 2 is detachably sleeved on the side of the pen body 1 opposite to the finger hole; a cavity is formed between the pen tip 2 and the pen body 1, and the pen refill is located in the cavity and is installed and limited on the pen body 1; the pen refill includes a pen refill tube 3, a corner connector 4, and a pen tip 5, the pen refill tube 3 being a flexible tube, and the corner connector 4 connecting the pen refill tube 3 and the pen tip 5; a through hole is provided on the pen tip 2 for the pen tip 5 to pass through, and the through hole coincides with the center line of the finger hole.
[0039] In this embodiment, both the pen body 1 and the pen tip 2 are made of rigid materials. The pen tip 2 can be bullet-shaped and has a cavity inside. After the pen body 1 is fitted into the pen tip 2, the cavity is formed between the two. The pen body 1 and the pen tip 2 are detachably connected, for example, by snap-fit or bolt-fit.
[0040] The pen body 1 has a finger hole for inserting a finger. Therefore, the shape of the finger hole can be various, such as cylindrical, elliptical cylindrical, curved, or conical, as long as the finger hole can move the pen for writing after the finger is inserted. In this example, the finger hole is designed as a cylinder with a curved structure at one end.
[0041] It should be noted that the finger hole can be configured as a chamber for one or more fingers as needed. In this example, only the finger hole chamber for a fingertip pen that is adapted to fit one finger is shown.
[0042] To improve the precision of finger pen control, the pen tip 5 and the finger hole are preferably designed on the same axis. In this case, the finger pen is essentially an extension of the finger, significantly improving the tactile feel, control precision, and dexterity. The center line of the finger hole is the central axis of the circular finger hole. The axis of the pen tip 5 coincides with the center line of the finger hole, placing the pen tip 5 and the fingertip on the same reference point. Therefore, when writing with it, the direction of force applied can be completely aligned with the ink application point. This improves the control over the amount of force applied during ink application, leading to more precise control over the thickness and twisting variations of each stroke, resulting in more aesthetically pleasing and beautiful handwriting.
[0043] Since the pen refill tube 3 is spirally wound and the pen tip 5 is located on the center line of the pen refill tube 3, if the two are directly connected together, and the pen refill tube 3 is a flexible tube, the flexible tube is easily deformed due to compression near the connection point, which may lead to ink leakage or poor ink flow.
[0044] Therefore, the finger pen in this application uses a soft pen core tube 3, which is confined to the outer wall of the pen body 1 in a spiral winding manner. During assembly, the pen core is simultaneously inserted into the pen tip 2 along with the pen body 1. This design makes the entire process of inserting the pen core relatively easier. At the same time, by using a corner two-way connector 4, a large-angle deflection connection between the pen core tube 3 and the pen tip 5 is achieved within a small space. This will help reduce the bending amplitude of the pen core tube 3. This design not only simplifies the manufacturing process but also reduces the overall production cost of the finger pen.
[0045] According to some embodiments of this application, the corner two-way connector 4 includes a first connecting post 41 and a second connecting post 42. The first connecting post 41 is connected to the pen refill tube 3, and the second connecting post 42 is connected to the pen tip 5. There is an angle between the axes of the first connecting post 41 and the second connecting post 42. The corner two-way connector 4 has an oil passage that passes through the first connecting post 41 and the second connecting post 42.
[0046] The rotation angle between the axes of the first connecting post 41 and the second connecting post 42 is 45°-90°, which can achieve a large-angle deflection connection between the pen tip tube 3 and the pen tip 5 within a limited space. This will help reduce the bending amplitude of the pen tip tube 3 at the bending part, and thus help avoid ink interruption or poor ink flow when writing.
[0047] According to some embodiments of this application, the angled two-way connector 4 includes a flexible hose retainer 43, which is used to secure the pen refill tube 3 sleeved on the first connecting post 41. By providing the flexible hose retainer 43, the overlap position between the pen refill tube 3 and the first connecting post 41 can be reinforced, thereby preventing ink from leaking out from the overlap position due to excessive compression and deformation of the flexible hose during the high-speed centrifugal removal of ink bubbles from the pen refill. At the same time, the flexible hose retainer 43 can also limit the deformation of the flexible hose segment located within the flexible hose retainer 43 when the pen refill tube 3 is bent, thereby increasing the bendability of the pen refill tube 3 at the bending point while ensuring no ink leakage.
[0048] According to some embodiments of this application, the corner two-way head 4 is provided with a first mating punch 44, which is coaxially arranged opposite to the second connecting post 42. Since the pen tip 5 is mounted on the second connecting post 42, by providing the first mating punch 44 in the straight line direction corresponding to the pen tip 5, the corner two-way head 4 can be positioned in the direction of the pen tip axis, so that the pen tip 5 can be inserted into the through hole on the pen head 2.
[0049] According to some embodiments of this application, the corner two-way connector 4 is further provided with a second mating punch 45. The second mating punch 45 is arranged at the end opposite to the first connecting post 41, and the second mating punch 45 and the first connecting post 41 are also coaxially arranged. The main purpose of the second mating punch 45 is to serve as a mechanical ejector pin receiving surface, assisting in the mating of the corner two-way connector 4 and the hose retainer 43, as well as the corner two-way connector 4 and the pen refill tube 3. It can also assist in positioning the corner two-way connector 4 on the pen body 1.
[0050] According to some embodiments of this application, an inlet groove 81 and a spiral groove 82 are provided on the outer wall of the pen body 1. The inlet groove 81 is located on the outer wall of the pen body 1, and the spiral groove 82 is arranged around the outer wall of the pen body 1. The pen refill tube 3 is confined in the spiral groove 82, and the first end of the spiral groove 82 communicates with the inlet groove 81. A limiting groove for limiting the corner two-way head 4 is provided in the inlet groove 81. The limiting groove includes a first groove 83, a second groove 84, and a third groove 85, which are used to limit different parts of the corner two-way head 4 respectively. The corner two-way head 4 is confined in the inlet groove 81.
[0051] The challenge of this design lies in eliminating the outward tension of the spiral-shaped pen refill and accurately positioning the components within a limited space. To restrain the outward spiral tension of the pen refill tube 3, both ends of the pen refill tube 3 need to be positioned. Since the pen refill tube 3 and the angled two-way connector 4 are fixedly connected by a hose clamp 43, they can actually position each other. Positioning only the end of the pen refill tube 3 near the first connecting post 41 while simultaneously meeting various design requirements is actually quite complicated. However, indirectly positioning the end of the pen refill tube 3 near the first connecting post 41 by positioning the angled two-way connector 4 is much simpler.
[0052] According to some embodiments of this application, when placing the pen refill onto the pen body 1, the pen refill can be first introduced into the inlet groove 81, and the angled two-way connector 4 and the flexible hose retainer 43 can be placed into the inlet groove 81. Then, the first mating punch 44 is inserted into the third groove 85. Then, the angled two-way connector 4 and the flexible hose retainer 43 are rotated 20°-45° around the finger hole axis, so that the angled two-way connector 4 and the flexible hose retainer 43 can be rotated into the first groove 83 and the second groove 84. Thus, the relative positioning of the angled two-way connector 4 and the flexible hose retainer 43 in the direction along the finger hole axis can be completed. Specifically, as shown below... Figure 4 and Figure 5 As shown, the first groove 83 mainly restricts the portion on the flexible hose retainer 43, the second groove 84 mainly restricts the portion on the corner connector 4 opposite to the flexible hose retainer 43 (i.e., the second mating punch 45), and the third groove 85 mainly restricts the portion on the first mating punch 44. By setting the limiting grooves to limit the corner connector 4, the corner connector 4 can be positioned appropriately on the pen body 1, while simultaneously positioning the pen tip 5 on the center line of the finger hole.
[0053] To achieve circumferential positioning of the angled two-way connector 4 and the tubing retainer 43 around the finger hole axis, it is only necessary to position the end of the spiral flexible tube 3 near the finger hole inlet. To restrict the end of the spiral tube 3 near the finger hole inlet, the end section of the spiral groove 82 is designed as a constricted structure, that is, the opening of the spiral groove 82 at the end section is slightly smaller, as shown in the following figure. Figure 7 As shown in the limiting constriction section 821, the width of the limiting constriction section 821 narrows towards the end. After inserting or clamping the end of the flexible pen refill tube 3 into the limiting constriction section 821 at the end of the spiral groove 82, the end of the spiral pen refill tube 3 near the finger hole entrance can be locked. When the spiral groove 82 is provided on the pen body, if it is not narrowed at the end of the spiral groove 82, once all the components are assembled and tightened, the pen tip will be difficult to remove from the pen body due to the outward tension of the spiral flexible tube. A pen that could have a replaceable refill will be forced to become a disposable pen. To facilitate the removal of the pen tip 2 from the pen body 1, preferably, before installing the spiral flexible pen tip 3, a small piece can be obliquely cut or shaved off the outer spiral surface of the pen tip 3 at the end of the pen tip 3 that is not yet inserted into the limiting constriction section 821, without affecting the insertion of the tail end of the pen tip tube 3 into the limiting constriction section 821. This will make the disassembly process between the pen body 1 and the pen tip 2 easier.
[0054] It should be noted that this design has requirements regarding the length of the pen refill tube 3. Specifically, the length of the pen refill tube 3 must be sufficient for its tail end to fit into the limiting constriction section 821. The adjustable range of the pen refill tube 3's length is very small. Because different people have different finger sizes, the length of the finger holes on finger pens varies. Therefore, for the same type of finger pen of different sizes, the corresponding length of the pen refill tube 3 will also differ.
[0055] Due to the fixed connection between the pen refill tube 3 and the angled two-way connector 4, after positioning one end of the pen refill tube 3 near the finger hole inlet, the circumferential positioning of the angled two-way connector 4 and the oil pipe retainer 43 on the axis around the finger hole is actually completed. Combined with the previously mentioned forward and backward movement positioning on the finger hole axis, the omnidirectional positioning of the angled two-way connector 4 and the oil pipe retainer 43 is also completed. Simultaneously, this means that the omnidirectional positioning of the pen refill tube 3 near the first connecting post 41 is completed. Once both ends of the pen refill tube 3 are positioned, the outward spiral tension of the flexible pen refill tube 3 as it coils around the pen body 1 can be constrained in all directions, thus completing the omnidirectional positioning of the entire pen refill.
[0056] According to some embodiments of this application, the cross-section of the spiral groove 82 can be any one of square, circular, or U-shaped. For a circular spiral groove 82, when the depth of the spiral groove 82 is greater than the radius of the pen refill tube 3, the inlet width of the spiral groove 82 will be smaller than the outer diameter of the pen refill tube 3, which can better limit the pen refill tube 3 after it is inserted.
[0057] According to some embodiments of this application, a pen cap 6 is also included to protect the pen tip 5. The pen cap 6 is detachably plugged into the pen tip 2. When the finger pen is not in use, the pen cap 6 can be placed on the pen tip 2 to protect the pen tip 5. When writing is required, the pen cap 6 can be removed.
[0058] According to some embodiments of this application, a pen clip may also be provided on the outer wall of the pen cap 6, so as to conveniently clip the finger pen to a book or clothing. At the same time, a hanging hole may be provided on the pen clip for threading a hanging rope, so as to facilitate hanging the finger pen.
[0059] According to some embodiments of this application, the pen tip 2 is provided with an air vent, which is connected to a cavity for accommodating the pen refill. Since the cavity enclosed between the pen tip 2 and the pen body 1 is relatively closed, the air vent, which connects the pen refill to the outside environment and the cavity, helps maintain pressure balance within the cavity, thereby ensuring stable ink flow at the pen tip 5 during writing. The specific location of the air vent is not limited here.
[0060] According to some embodiments of this application, a suitable flexible finger sleeve 7 is provided inside the finger hole. Since the pen body 1 is generally made of a hard material, discomfort may occur with prolonged use. To improve writing comfort, a flexible finger sleeve 7 is specifically designed. The flexible finger sleeve 7 not only improves comfort, but its varying thicknesses also accommodate different finger sizes. Simultaneously, the flexible finger sleeve 7 strengthens the fit between the fingertip pen and the finger, preventing the pen from slipping off.
[0061] According to some embodiments of this application, a telescopic opening is provided on the side wall of the flexible finger sleeve 7. When the flexible finger sleeve 7 is inserted into or removed from the finger hole, the telescopic opening facilitates the expulsion or intake of air, thereby making it convenient to place or disassemble the flexible finger sleeve 7. At the same time, the telescopic opening can also serve as an air channel connecting the inside and outside of the finger hole, effectively preventing stuffiness inside the finger hole and improving writing comfort.
[0062] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A finger wrap type stylus pen in which a soft tube cartridge is integrated with a pen body, characterized in that, The utility model provides a pen, including refill, pen body and pen head, one side of pen body is provided with the finger hole for inserting finger, the pen head detachably sleeve joint is in the side of pen body away from the finger hole, the cavity is formed around the pen head with the pen body, the refill is located in the cavity and installs the limit in the pen body, the refill includes refill pipe, corner two -way head and pen nib, the refill pipe is hose, corner two -way head communicates refill pipe with pen nib, the through -hole that the pen nib passes out is set up on the pen head, the through -hole coincides with the center line of finger hole.
2. The soft tube pen core and pen body fusion around the finger type finger pen according to claim 1, characterized in that, The outer wall of the pen body is provided with a guide slot and a spiral groove, the spiral groove is arranged around the outer wall of the pen body, the refill pipe is limited in the spiral groove, the first end of the spiral groove is through with the guide slot, and the corner two-way head is limited in the guide slot.
3. The soft tube pen core and pen body integrated around the finger type pen according to claim 2, characterized in that, The guide slot is provided with a limiting groove for limiting the corner two-way head, the limiting groove includes a first slot, a second slot and a third slot for limiting different parts of the corner two-way head.
4. The soft tube pen core and pen body integrated around the finger type pen according to claim 2, characterized in that, The entrance width of the spiral groove near the tail end is slightly smaller than the outer diameter of the refill pipe, and the tail depth of the spiral groove is slightly larger than the radius of the refill pipe.
5. The soft tube pen core and pen body integrated around the finger type pen according to claim 2, characterized in that, The cross section of the spiral groove can be any one of square, circular or U-shaped.
6. The soft tube pen core and pen body integrated around the finger type pen according to claim 1, characterized in that, The corner two-way head includes a first connecting column and a second connecting column, the first connecting column is connected with the refill pipe, the second connecting column is connected with the pen nib, the axis of the first connecting column and the second connecting column has a corner, the corner two-way head has an oil channel, and the oil channel penetrates the first connecting column and the second connecting column.
7. The soft tube refill for a fusing type of a finger pen according to claim 6, wherein The corner two-way head includes a hose clasp, which is used to fix the refill pipe sleeved on the first connecting column.
8. The soft tube refill for a wrap-around type stylus pen according to claim 6, wherein The corner two-way head is provided with a first butt head, and the first butt head is coaxially arranged opposite to the second connecting column.
9. The soft tube refill for a fusing type of a finger pen according to claim 8, wherein The corner two-way head is also provided with a second butt head, and the second butt head is arranged at the end opposite to the first connecting column.
10. The soft tube pen core and pen body fusion around the finger type finger pen according to claim 1, characterized in that, The finger hole is provided with a flexible finger sleeve, and the pen head is provided with a plug-in connectable pen cover.