A finger wrap type soft tube refill finger pen

Abstract

This invention discloses a fingertip pen with a flexible refill, comprising a refill, a pen body, and a pen tip. The refill includes a refill tube, a corner connector, and a pen tip. The refill tube is a flexible tube, and the corner connector connects the refill tube and the pen tip. A finger hole for accommodating a finger is provided on one side of the pen body, and the pen tip is fitted onto the side of the pen body opposite to the finger hole. A cavity for holding the refill is provided between the pen tip and the pen body, and a through hole for the pen tip to pass through is provided on the pen tip, the through hole coinciding with the center line of the finger hole. This fingertip pen, by using a flexible refill tube that can be coiled in a spiral groove during assembly, and with the corner connector, achieves a large-angle deflection connection between the refill tube and the pen tip, reducing the bending amplitude of the refill tube. This fingertip pen not only simplifies the manufacturing process but also reduces the overall production cost.

Description

Technical Field

[0001] This invention relates to the field of finger pen technology, and more specifically to a finger pen with a flexible, finger-wrap pen core. 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 drawbacks of high manufacturing difficulty and cost 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 center line of the spiral, 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 flexible tube, and ensuring smooth assembly and disassembly of the components are all implementation challenges that need to be addressed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing finger pens by providing a finger-wrap flexible refill finger pen. This finger pen, through reasonable optimization design and the use of a soft refill tube, not only simplifies the manufacturing process of the finger pen but also reduces the overall production cost.

[0005] This invention is achieved through the following technical solution: This invention provides a finger pen with a flexible refill, comprising a refill, a pen body, and a pen tip. The refill includes a refill tube, a two-way connector, and a pen tip. The refill tube is a flexible tube, and the two-way connector connects the refill tube and the pen tip. A finger hole for accommodating a finger is provided on one side of the pen body, and the pen tip is fitted onto the side of the pen body opposite to the finger hole. A receiving cavity for placing the refill is provided between the pen tip and the pen body, and a through hole for the pen tip to pass through is provided on the pen tip, the through hole coinciding with the center line of the finger hole.

[0006] As a preferred embodiment of the present invention, 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.

[0007] As a preferred embodiment of the present invention, the corner two-way connector includes a hose retainer, which is used to fix the pen refill tube sleeved on the first connecting post.

[0008] As a preferred embodiment of the present invention, the corner two-way head is provided with a first docking punch and a second docking punch, the first docking punch and the second connecting post are arranged coaxially opposite each other, and the second docking punch is arranged at the end opposite to the first connecting post.

[0009] As a preferred embodiment of the present invention, the pen refill is mounted and fixed on the pen body or the pen refill is mounted and fixed on the pen tip.

[0010] As a preferred embodiment of the present invention, the pen body is provided with an inlet groove and a spiral groove, the spiral groove surrounds the outer wall of the pen body, the pen core tube is limited in the spiral groove, one end of the spiral groove communicates with the inlet groove, and the corner two-way head is limited in the inlet groove; Alternatively, the pen tip is provided with an inlet groove and a spiral groove, the spiral groove is surrounded on the inner wall of the pen tip, the pen core tube is confined in the spiral groove, one end of the spiral groove is connected to the inlet groove, and the corner two-way head is confined in the inlet groove.

[0011] As a preferred embodiment of the present invention, 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.

[0012] As a preferred embodiment of the present invention, it further includes a pen cap for protecting the pen tip, wherein the pen cap and the pen tip are detachably plugged in.

[0013] As a preferred embodiment of the present invention, the pen tip is provided with an air guide hole, and the air guide hole is in communication with the receiving cavity.

[0014] As a preferred embodiment of the present invention, a flexible finger sleeve is provided inside the finger hole, and the flexible finger sleeve is used to cooperate with the finger.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: The finger pen of this invention uses a soft pen tip tube. During assembly, the flexible tube can be wound into the spiral groove through the guide plate, and with the help of a corner two-way connector, a stable connection is achieved between the pen tip tube and the pen tip when they make large-angle deflections within a small space. This reduces the bending amplitude of the pen tip tube and solves the problem of ink interruption caused by deformation of the soft pen tip tube during normal writing. The various parts of the spiral pen tip are positioned to ensure smooth assembly and disassembly of the components.

[0016] Compared to previous hard-tipped finger pens with irregular refills and other types of finger pens, this finger-wrap soft-tipped finger pen not only combines the advantages of higher pen control precision and greater control over ink pressure that all finger pens possess, but also incorporates the unique advantage of finger-wrap pens, which can apply force evenly in all directions on a flat surface. At the same time, it simplifies the manufacturing process of finger-wrap pens and reduces the overall cost of industrial mass production of finger pens.

[0017] 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, L-shaped, S-shaped, and U-shaped pen refills can all be produced by referring to the technology of spiral pen refills. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention 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: Figure 1 This is a perspective view of the finger-wrap type flexible tube pen tip pen of the present invention; Figure 2 This is a schematic diagram of the corner two-way connector in this invention; Figure 3 This is a cross-sectional view of the fingertip when the pen refill is placed on the pen body in this invention; Figure 4 For the present invention Figure 3 A schematic diagram of the pen body in the image; Figure 5 For the present invention Figure 3 Diagram showing the combination of the pen refill and the pen body; Figure 6 This is a sectional view of a finger when the pen refill is placed on the pen tip in this invention; Figure 7 For the present invention Figure 6A diagram of the pen tip; Figure 8 For the present invention Figure 6 Diagram showing the combination of the pen refill and the pen tip.

[0019] The attached diagram shows the markings and corresponding component names: 1-Pen body, 2-Pen tip, 21-Through hole, 3-Pen core 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, 83-First groove, 84-Second groove, 85-Third groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only for explaining this invention and are not intended to limit this invention.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Existing finger pens generally have irregularly shaped ink cartridges. In most published finger pen designs, the ink cartridges are made of rigid materials. Currently, the only technological solutions for producing rigid cartridges of the desired shape are blow molding or secondary molding, both of which are relatively difficult and costly.

[0030] To reduce the manufacturing difficulty and cost of finger pens, the applicant, after in-depth research, invented a new type of finger pen solution. By using a soft pen core tube and incorporating a corner two-way connector, the pen core tube and pen tip can achieve a large-angle deflection connection within a small space, thereby reducing the bending amplitude of the pen core tube. This finger pen not only simplifies the manufacturing process but also reduces the overall production cost. Example 1

[0031] Please refer to Figures 1 to 5 This application provides a finger pen with a flexible refill, comprising a refill, a pen body 1, and a pen tip 2. The refill includes a refill tube 3, a two-way connector 4, and a pen tip 5. The refill tube 3 is a flexible tube, and the two-way connector 4 connects the refill tube 3 and the pen tip 5. A finger hole for accommodating a finger is provided on one side of the pen body 1, and the pen tip 2 is sleeved on the side of the pen body 1 opposite to the finger hole. A receiving cavity for placing the refill is provided between the pen tip 2 and the pen body 1, and a through hole 21 for the pen tip 5 to pass through is opened on the pen tip 2. The through hole 21 coincides with the center line of the finger hole.

[0032] In this embodiment, both the pen body 1 and the pen tip 2 are made of hard materials. The pen tip 2 is bullet-shaped and has a cavity inside. The pen body 1 is inserted into the cavity, and the two form the aforementioned receiving cavity. The pen body 1 and the pen tip 2 are detachably connected, for example, by snap-fit ​​or bolt-fit.

[0033] The pen body 1 is provided with a finger hole for inserting a finger. The finger hole can be cylindrical, elliptical, curved, or conical, etc., as long as the finger hole can move the pen to write after the finger is inserted. In the embodiments of this application, the finger hole is designed as a cylinder with a curved structure at one end.

[0034] It should be noted that the finger hole can be configured as a chamber to fit one or more fingers as needed; this example only shows a finger pen style for fitting one finger.

[0035] To improve the precision of the finger pen, 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 feedback, control precision, and dexterity. The center line of the finger hole coincides with the center line of the through hole 21, and the center line of the pen tip 5 coincides with the center line of the finger hole. With the pen tip 5 and the fingertip on the same aligning point, the direction of force applied when writing with this finger pen can perfectly align 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 torsional variations of each stroke, resulting in more aesthetically pleasing and beautiful handwriting.

[0036] To solve the technical challenges in producing spiral pen refills, this application employs a soft pen refill tube 3 and a corner two-way connector 4 to achieve a large-angle deflection connection between the pen refill tube 3 and the pen tip 5 within a small space. This reduces the bending amplitude of the pen refill tube 3 at the bending point, which not only simplifies the manufacturing process of the finger pen but also reduces the overall production cost of the finger pen.

[0037] 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.

[0038] The angle between the axes of the first connecting post 41 and the second connecting post 42 will vary depending on the basic configuration of the fingertip pen. When the basic configuration of the fingertip pen is a one-finger-wrapping type, the angle between the axes of the first connecting post 41 and the second connecting post 42 is approximately between 45° and 90°. The oil passage inside the angle two-way connector 4 is divided into two sections, one located at the center of the first connecting post 41 and the other at the center of the second connecting post 42. The two sections are connected at the intersection. After connecting with the pen refill tube 3 and the pen tip 5, the oil passage runs through the entire pen refill.

[0039] Because the pen refill must undergo a high-speed centrifugation process to remove air bubbles from the ink after filling, if the flexible tube is directly fitted onto the first connecting post 41, the tube will be forced to deform during high-speed centrifugation, leading to ink leakage. To solve this problem, two approaches are needed simultaneously: 1. During high-speed centrifugation, the pen refill needs to be placed in a specially designed groove to prevent the flexible tube from deforming excessively during the centrifugation process. In actual production, this only requires designing a special bundled storage box based on the existing centrifuge. 2. The overlap between the flexible tube and the first connecting post 41 needs to be reinforced to prevent ink from leaking out from the overlap due to excessive compression and deformation of the flexible tube during centrifugation.

[0040] According to some embodiments of this application, the corner two-way connector 4 includes a flexible hose retainer 43, which is used to fix the pen refill tube 3 sleeved on the first connecting post 41. Given the limited space between the pen body 1 and the pen tip 2, by providing the aforementioned flexible hose retainer 43, the pen refill tube 3 can be stably fixed to the corner two-way connector 4 within a small space, thereby preventing the pen refill tube 3 from falling off the corner two-way connector 4 during centrifugation and preventing ink overflow. At the same time, the flexible hose retainer 43 can also restrict the deformation of the flexible hose section located within the retainer 43 when bending the pen refill tube 3, increasing the bendability of the pen refill tube 3 while ensuring no ink leakage.

[0041] Specifically, annular protrusions can be provided on the first connecting post 41 and the hose clamp 43. After installation, the annular protrusions compress the hose, achieving a fixed overlapping section. The hose itself has a certain degree of elasticity; to adjust the tightness, simply adjust the protrusion value of the hose clamp 43. The hose clamp 43 can be made of hard plastic, steel, or other rigid materials. If steel is used, the wall thickness of the hose clamp 43 can be appropriately reduced. This will help reduce the angle between the axes of the first connecting post 41 and the second connecting post 42, thereby helping to reduce the bending amplitude of the pen refill tube 3 at the bending point.

[0042] According to some embodiments of this application, the corner two-way connector 4 is provided with a first mating punch 44 and a second mating punch 45. The first mating punch 44 and the second connecting post 42 are arranged coaxially opposite each other, and the second mating punch 45 and the first connecting post 41 are also arranged coaxially opposite each other. The first mating punch 44 can assist the docking and positioning of the pin on the pen refill assembly machine when the pen tip 5 is installed onto the second connecting post 42, so that the pen tip 5 can be inserted into the groove on the second connecting post 42. At the same time, the first mating punch 44 can also assist the positioning of the pen tip 5 on the center line of the finger hole when the pen refill is installed onto the pen body 1. Similar to the first mating punch 44, the second mating punch 45 can also assist the docking, positioning and installation between the corner two-way connector 4 and the pen refill tube 3, and can also assist the relative positioning between the corner two-way connector 4 and the pen body 1.

[0043] According to some embodiments of this application, the pen refill is installed and fixed on the pen body 1. Specifically, the pen refill is spirally coiled and positioned on the outer wall of the pen body 1, and during assembly, the pen refill is simultaneously inserted into the pen tip 2 along with the pen body 1. The entire operation process of this pen refill placement method is relatively simple, but after the pen tip 2 and the pen body 1 are closed, because the pen refill is set on the outer wall of the pen body 1, the outward tension of the spiral flexible tube will force the flexible tube away from the outer wall of the pen body 1, causing the pen refill tube 3 to adhere to the inner wall of the pen tip 2. If the tail end of the spiral pen refill is not limited, it will affect the smooth separation between the pen body 1 and the pen tip 2 after they are closed. In severe cases, it may even be locked directly, turning the replaceable pen refill into a disposable pen.

[0044] According to some embodiments of this application, the pen body 1 is provided with an inlet groove 81 and a spiral groove 82. The spiral groove 82 surrounds the outer wall of the pen body 1, and the pen refill tube 3 is confined in the spiral groove 82. One end of the spiral groove 82 communicates with the inlet groove 81, and the corner connector 4 is confined in the inlet groove 81. When placing the pen refill, the corner connector 4 on the pen refill, together with one end of the pen refill tube 3, is first pressed into the inlet groove 81, and then the pen refill tube 3 is coiled into the spiral groove 82, thereby confining the pen refill to the outer wall of the pen body 1. The inlet groove 81 not only has an inlet function, but also appropriately reduces the overall weight.

[0045] When the spiral groove 82 is located on the outer wall of the pen body 1, due to the outward spiral tension of the pen refill tube 3, the spiral groove 82 on the pen body 1 needs to have a certain depth requirement, so as to better confine the pen refill tube 3 in the spiral groove 82. Therefore, when the spiral groove 82 is located on the pen body 1, the outer diameter of the pen body 1 needs to be appropriately increased. Compared with the case where the spiral groove 82 is located on the inner wall of the pen tip 2, the outer diameter of the pen tip 2 will be slightly larger.

[0046] When the spiral groove 82 is located on the outer wall of the pen body 1, to restrict the outward spiral tension of the spiral pen refill tube 3, both ends of the pen refill tube 3 need to be restricted simultaneously. Restricting only the end of the pen refill tube 3 near the pen tip 5 without affecting the positioning of other parts of the pen refill is actually quite complicated. However, if only the corner connector 4 and the flexible hose retainer 43 need to be positioned, it becomes much simpler. Because the end of the pen refill tube 3 near the pen tip 5 can be fixed to the first connecting post 41 on the corner connector 4 via the flexible hose retainer 43, the positioning of the pen refill tube 3 near the pen tip 5 can be achieved simply by omnidirectional positioning of the corner connector 4 and the flexible hose retainer 43.

[0047] According to some embodiments of this application, the inlet groove 81 is provided with a limiting groove for limiting the corner two-way connector 4 and the hose retainer 43. The limiting groove includes a first groove 83, a second groove 84, and a third groove 85, which are used to limit different parts on the corner two-way connector 4 respectively. When placing a pen refill, the pen refill can be first inserted into the inlet groove 81, the corner two-way connector 4 and the hose retainer 43 can be placed into the inlet groove 81, the first mating punch 44 can be inserted into the third groove 85, and then the corner two-way connector 4 and the hose retainer 43 can be rotated 20º-45º around the axis of the finger hole, so that the corner two-way connector 4 and the hose retainer 43 can be rotated into the first groove 83 and the second groove 84, thereby completing the relative positioning of the movement of the corner two-way connector 4 and the hose retainer 43 along the axis of the finger hole, specifically as follows. Figure 4 and Figure 5 As shown, the first groove 83 mainly restricts the part of the hose clamp 43, the second groove 84 mainly restricts the part of the corner two-way head 4 opposite to the hose clamp 43 (i.e. the second docking punch 45), and the third groove 85 mainly restricts the part of the first docking punch 44.

[0048] The pen refill tube 3 and the angled two-way connector 4 are actually mutually positioning. Since the pen refill tube 3 and the angled two-way connector 4 are fixedly connected together by a flexible hose retainer 43, in order to achieve circumferential positioning of the angled two-way connector 4 and the flexible hose retainer 43 on the axis around the finger hole, it is only necessary to position the end of the spiral flexible hose pen refill tube 3 near the finger hole inlet.

[0049] To restrict the spiral pen refill tube 3 near the finger hole inlet, the end of the spiral groove 82 is designed as a constricted structure, meaning the opening of the spiral groove 82 at the end is slightly smaller, and the width of the spiral groove 82 narrows closer to the end. After inserting or snapping the end of the flexible pen refill tube 3 into the narrowed spiral groove 82, the end of the spiral pen refill tube 3 near the finger hole inlet is locked. To facilitate the removal of the pen tip 2 from the pen body 1, preferably, without affecting the insertion of the end of the pen refill tube 3 into the groove of the spiral groove 82, a small piece can be cut or shaved obliquely from the end of the pen refill tube 3 near the outer spiral surface of the spiral flexible tube before installing the spiral flexible pen refill. This will facilitate the disassembly process between the pen body 1 and the pen tip 2.

[0050] Since the pen refill tube 3 and the angled two-way connector 4 are fixedly connected, after positioning the end of the pen refill tube 3 near the finger hole inlet, the circumferential positioning of the angled two-way connector 4 and the flexible tube retainer 43 on the finger hole axis is actually completed. Combined with the aforementioned relative positioning via forward and backward movement on the finger hole axis, the omnidirectional positioning of the angled two-way connector 4 and the flexible tube retainer 43 is also completed. Simultaneously, this means that the positioning of the pen refill tube 3 near the first connecting post 41 is also 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.

[0051] 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.

[0052] 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 to facilitate threading a hanging rope to hang the finger pen.

[0053] According to some embodiments of this application, the pen tip 2 is provided with an air guide hole, which is interconnected with the receiving cavity. Since the receiving cavity structure is relatively closed, an air guide hole is needed to connect the outside to the receiving cavity in order to facilitate ink flow from the pen refill within the cavity. The air guide hole helps maintain pressure balance within the receiving cavity, thereby ensuring ink flow stability at the pen tip 5 during writing. The specific location of the air guide hole is not limited here.

[0054] 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.

[0055] 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 easy 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. Example 2

[0056] Please refer to Figure 1 , Figure 2 , Figures 6 to 8 This application provides a finger-wrap type flexible tube refill finger pen, whose overall structure is roughly the same as that in embodiment 1. The difference is that in this embodiment, the refill is installed and fixed on the pen head 2. Specifically, the refill is spirally coiled and positioned on the inner wall of the pen head 2. During assembly, the refill is simultaneously fitted onto the pen body 1 along with the pen head 2. When using this design, the entire refill placement process is relatively cumbersome. However, after the pen head 2 and pen body 1 are joined, because the refill is set on the inner wall of the pen head 2, the outward tension of the spiral flexible tube will force the tube to adhere tightly to the inner wall of the pen head 2. The overall shape stability of the refill after positioning is very good. Moreover, because the pen body 1 is not greatly affected by the friction between the spiral flexible tube and the pen head 2, it is not necessary to specifically position the end of the refill tube 3 near the finger hole entrance in order to smoothly disassemble the assembled pen body 1 and pen head 2.

[0057] According to some embodiments of this application, the pen tip 2 is provided with an inlet groove 81 and a spiral groove 82. The spiral groove 82 surrounds the inner wall of the pen tip 2, and the pen refill tube 3 is placed in the spiral groove 82. One end of the spiral groove 82 communicates with the inlet groove 81, and the angled two-way connector 4 is placed in the inlet groove 81. When installing the pen refill, first insert the pen refill into the inlet groove 81, and at the same time insert the pen tip 5 into the through hole 21 on the pen tip 2, thereby completing the positioning of the angled two-way connector 4 and the flexible hose retainer 43 in the direction of the finger hole axis. Then, rotate the angled two-way connector 4 and the flexible hose retainer 43 around the finger hole axis by 20º-45º, 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. Then, the pen refill tube 3 is inserted step by step into the spiral groove 82 inside the pen tip 2.

[0058] When the spiral groove 82 is placed on the inner wall of the pen tip 2, the difficulty in implementing this design is no longer how to eliminate the outward spiral tension of the soft pen tip, but how to smoothly insert the soft pen tip tube 3 into the spiral groove 82 and accurately complete the relative positioning between the components.

[0059] When the spiral groove 82 is set on the inner wall of the pen tip 2, due to the outward spiral tension of the pen refill tube 3, the flexible tube will be forced to adhere tightly to the inner wall of the pen tip 2. Therefore, the depth of the spiral groove 82 on the inner wall of the pen tip 2 can be shallower than when the spiral groove 82 is set on the pen body 1. This not only reduces weight but also increases the inner diameter of the pen tip 2. Increasing the inner diameter of the pen tip 2 will facilitate a smoother placement of the pen refill throughout the entire process.

[0060] According to some embodiments of this application, the inlet groove 81 is provided with a limiting groove for limiting the corner two-way connector 4 and the hose retainer 43. The limiting groove includes a first groove 83, a second groove 84, a third groove 85, and a through hole 21, which are used to limit different parts on the corner two-way connector 4 and the hose retainer 43, respectively. When the pen refill is placed on the inner wall of the pen tip 2, the first groove 83 mainly limits the part on the hose retainer 43, and the second groove 84 mainly limits the part on the corner two-way connector 4 opposite to the hose retainer 43. However, at this time, the third groove 85 on the pen tip 2 becomes mainly used to make way for the corner two-way connector 4 and to undertake part of the auxiliary positioning function. At this time, the positioning function of the third groove 85 in the direction of the finger hole axis in the previous embodiment is actually mainly undertaken by the through hole 21 on the pen tip 2.

[0061] In this embodiment, the pen tip 5 is still fixed to the second connecting post 42 on the corner two-way connector 4. When positioning the entire pen refill onto the inner wall of the pen head 2, the through hole 21 is not only used to insert the pen tip 5, but also to assist in positioning the entire pen refill on the axis of the finger hole. When winding the pen refill tube 3, the corner two-way connector 4 and the flexible tube retainer 43 are also positioned in all directions. Once wound, it is difficult to change, which means that once the winding is finalized, the direction of the axis of the pen tip 5 is determined. If there is a deviation when winding the pen refill tube 3, it is easy to cause the pen tip 5 to deviate from the axis of the finger hole. Therefore, when implementing this design, the through hole 21 on the pen head 2 must be designed to be slightly deeper, and the diameter of the through hole 21 should not be too large. It is best to match the outer diameter of the pen tip 5. In this way, even if there is a slight error when winding the flexible tube, the pen tip 5 can still be positioned on the axis of the finger hole under the constraint of the through hole 21. Compared with the previous embodiment where the spiral groove 82 is combined with the pen body 1, with the distance of the pen tip 5 extending out of the pen head 2 remaining unchanged, as the depth of the through hole 21 on the pen head 2 increases, the length of the pen tip 5 needs to be adjusted accordingly. The distance from the fingertip to the pen tip will increase, and the length of the entire pen will increase slightly.

[0062] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A finger-tip pen with a flexible, windproof refill, characterized in that, The pen includes a refill, a pen body, and a pen tip. The refill includes a refill tube, a two-way connector, and a pen tip. The refill tube is a flexible tube, and the two-way connector connects the refill tube to the pen tip. The refill is mounted and fixed on the pen body or the pen tip. One side of the pen body has a finger hole for accommodating a finger, and the pen tip is fitted onto the side of the pen body opposite to the finger hole. There is a cavity between the pen tip and the pen body for holding the refill, and the pen tip has a through hole for the pen tip to pass through, the through hole coinciding with the center line of the finger hole. The angle 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 angle two-way connector has an oil passage that runs through the first connecting post and the second connecting post. The corner two-way connector includes a hose retainer, which is used to fix the pen refill tube sleeved on the first connecting post; the corner two-way connector is provided with a first docking punch and a second docking punch, the first docking punch and the second connecting post are arranged coaxially opposite to each other, and the second docking punch and the first connecting post are arranged coaxially opposite to each other. The pen body is provided with an inlet groove, or the pen tip is provided with an inlet groove, and the corner two-way connector is limited in the inlet groove; the inlet groove is provided with a limiting groove for limiting the corner two-way connector, the limiting groove includes a first groove, a second groove and a third groove, which are used to limit different parts of the corner two-way connector respectively, wherein the first groove is used to limit the hose retainer, the second groove is used to limit the second docking punch, and the third groove is used to limit the first docking punch.

2. The finger-tip pen with a flexible refill as described in claim 1, characterized in that, The pen body is provided with a spiral groove, which surrounds the outer wall of the pen body. The pen core tube is confined in the spiral groove, and one end of the spiral groove communicates with the guide groove on the pen body. Alternatively, the pen tip may be provided with a spiral groove, which surrounds the inner wall of the pen tip, and the pen core tube is confined in the spiral groove, with one end of the spiral groove communicating with the guide groove on the pen tip.

3. The finger-tip pen with a flexible refill as described in claim 1, characterized in that, It also includes a pen cap for protecting the pen tip, the pen cap being detachably plugged into the pen tip.

4. The finger-tip pen with a flexible refill as described in claim 1, characterized in that, The pen tip is provided with an air guide hole, which is connected to the receiving cavity.

5. The finger-tip pen with a flexible refill as described in claim 1, characterized in that, A flexible finger sleeve is provided inside the finger hole, which is used to cooperate with the finger.

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