A twist pen having a twist-out core structure

Abstract

The application provides a rotating pen with a twist-out core structure, which comprises a pen cover, a double-color fluorescent pen head, a pen clamp, a pen barrel, a twist part, a sheath, and a pen head. The pen head is connected with a writing core in the inner pen barrel. The twist part is located between the pen barrel and the sheath and is connected with the two respectively. The twist part is internally provided with a thread or a clamping groove structure corresponding to the pen barrel and the sheath and is connected with a transmission structure of the writing core. The double-color fluorescent pen head is arranged at the end of the pen barrel far from the pen head, and the pen cover is detachably covered on the double-color fluorescent pen head. When the twist part is twisted, the writing core is driven to rotate and move along the axial direction through the spiral transmission of the thread or the clamping groove, so that the pen head is realized to be out of the core or into the core.

Description

Technical Field

[0001] This application relates to the field of stationery technology, and in particular to a rotating pen with a twisting lead-out structure. Background Technology

[0002] In daily study, office work, and creative scenarios, pens are commonly used tools for writing, marking, and so on. Currently available pens have relatively limited functions. If users need to simultaneously meet the needs of writing and highlighting, they need to prepare at least two pens (one writing pen and one highlighter), which is not only inconvenient to carry but also increases the cost of use.

[0003] To address this issue, some manufacturers have introduced dual-ended pens, featuring a writing tip and a highlighter tip at each end. Users switch between the two tips by removing or inserting the corresponding caps. However, this design has significant drawbacks: switching tips requires first removing the cap from the currently used end, then the cap from the other end, a cumbersome process that disrupts usability; furthermore, frequent cap removal can lead to cap loss and may cause tip wear or ink evaporation.

[0004] In addition, existing dual-tipped pens typically have independent control over the lead feed of each tip, requiring two separate lead feed structures to be installed inside the pen body. This not only increases the weight and manufacturing cost of the pen but may also lead to problems with inconsistent lead feed operation, affecting the user experience.

[0005] Therefore, how to design a rotary pen that integrates writing and fluorescent marking functions, simplifies the pen tip switching operation, reduces manufacturing costs, and ensures ease of use has become a pressing technical problem to be solved in this field. Utility Model Content

[0006] The purpose of this application is to provide a rotating pen with a twisting lead-out structure to overcome or alleviate the above-mentioned technical problems in the prior art.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A rotating pen includes a dual-color highlighter tip, a clip, a barrel, a twisting part, a sheath, and a pen tip. The pen tip is connected to a writing refill inside the barrel. The twisting part is located between the barrel and the sheath and is connected to both. The twisting part has a threaded or slotted structure corresponding to the barrel and the sheath, and is connected to the transmission structure of the writing refill. The dual-color highlighter tip is located at the end of the barrel away from the pen tip, and a cap is detachably placed over the tip. When the twisting part is twisted, the writing refill rotates and moves axially through the helical transmission of the threaded or slotted part, thus enabling the pen tip to extend or retract.

[0009] Optionally, the pen clip includes a pen clip body and a pen clip connector, wherein the pen clip connector is located between the pen clip body and the pen barrel, and fixes the pen clip body to the outside of the pen barrel.

[0010] Optionally, the dual-color highlighter tip has a dual-head structure and contains a highlighter cartridge inside. The end of the pen is provided with a pen cap, which cooperates with the end of the dual-color highlighter tip away from the pen cap to protect the internal highlighter cartridge.

[0011] Optionally, the outer surface of the twisting part is provided with anti-slip texture, which is evenly distributed along the circumference of the twisting part.

[0012] Optionally, the inner wall of the sheath is adapted to the outer wall of the pen tip, and when the pen tip is retracted, the sheath covers the exposed part of the pen tip.

[0013] Optionally, the connection between the pen barrel and the twisting part is provided with a circumferential limiting protrusion, and the corresponding position of the twisting part is provided with a matching limiting groove to limit the axial displacement of the twisting part relative to the pen barrel.

[0014] Optionally, the writing refill is a universal refill for push-button pens, and the pen barrel has a limiting structure adapted to the universal refill.

[0015] Optionally, the inner side of the pen cap is provided with an elastic buckle, and the outer wall of the dual-color highlighter tip is provided with a corresponding buckle groove. When the pen cap covers the dual-color highlighter tip, the elastic buckle engages and is fixed with the buckle groove.

[0016] Optionally, the connection strength between the twisting part and the sheath is greater than the lead ejection resistance of the writing pen refill, so as to ensure that the sheath remains relatively fixed when the twisting part is twisted.

[0017] The rotating pen provided in this application has the following technical advantages compared to the prior art:

[0018] I. Solving the problem of "multiple pens required for a single function, resulting in inconvenience in carrying and high usage costs".

[0019] In this application, a single rotating pen integrates a writing tip and a dual-color highlighter tip, eliminating the need to carry separate writing pens and highlighters, significantly improving portability. At the same time, a single pen achieves both writing and dual-color highlighting functions, avoiding the additional expenses incurred from purchasing multiple pens, resulting in relatively lower usage costs and directly alleviating the portability and cost pain points of traditional single-function pens.

[0020] II. Solving the problems of "cumbersome switching steps for dual-tipped pens, easy loss of pen caps, easy wear and tear on pen tips, and easy evaporation of ink".

[0021] This application solution achieves pen tip switching through a "twisting mechanism + spiral transmission": simply twisting the mechanism is enough to move the pen tip out or retract, eliminating the need to remove or insert any pen cap. This significantly simplifies the switching process and maintains better continuity of use. At the same time, since there is no need to remove or insert the pen cap, the probability of losing the cap is naturally reduced, and frictional wear on the pen tip during the removal and insertion process is avoided. It also reduces the contact between the ink inside the pen and the air, lowering the risk of ink evaporation. Compared with the switching method of traditional dual-tipped pens, this solution is more suitable for the convenience and stability requirements of learning and office scenarios.

[0022] Third, address the issues of "independent lead feeding control in dual-tipped pens resulting in heavy pens, high manufacturing costs, and uncoordinated operation."

[0023] This application adopts a "single twisting structure + dual-function pen tip" design: the writing tip is ejected or retracted solely through the helical transmission of the twisting part. The dual-color highlighter tip requires no additional control structure and can be used directly by removing the cap. As a result, the pen body is lighter due to the reduction of one set of lead ejection control structure, and the manufacturing cost is relatively lower due to the reduction of parts; moreover, the lead ejection operation of the writing tip is independent and smooth, avoiding the "uncoordinated lead ejection operation at both ends" problem of traditional dual-tipped pens, resulting in a superior user experience. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0025] Figure 1 This is a schematic diagram of the overall structure of the rotating pen according to an embodiment of this application.

[0026] Figure 2 This is a cross-sectional structural diagram of the rotating pen according to an embodiment of this application.

[0027] Figure 3 This is an exploded structural diagram of the rotating pen according to an embodiment of this application. Detailed Implementation

[0028] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0029] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to a fixed connection or a link; they can refer to a direct connection or an indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] like Figures 1-3 As shown, this application embodiment provides a rotating pen, including a pen cap 1, a dual-color highlighter 2, a pen clip 3, a pen barrel 4, a twisting part 5, a protective sleeve 6, and a pen tip 7. The pen tip 7 is connected to the writing refill inside the pen barrel 4. The twisting part 5 is located between the pen barrel 4 and the protective sleeve 6 and is connected to both of them. The twisting part 5 has a threaded or slotted structure corresponding to the pen barrel 4 and the protective sleeve 6, and is connected to the transmission structure of the writing refill. The dual-color highlighter 2 is located at the end of the pen barrel 4 away from the pen tip 7, and the pen cap 1 is detachably covered on the dual-color highlighter 2. When the twisting part 5 is twisted, the writing refill is rotated and moved axially through the helical transmission of the threaded or slotted part, realizing the extension or retraction of the pen tip 7.

[0031] Optionally, the pen clip 3 includes a pen clip body 9 and a pen clip connector 10, wherein the pen clip connector 10 is located between the pen clip body 9 and the pen barrel 4, and fixes the pen clip body 9 to the outside of the pen barrel 4.

[0032] Specifically, the pen clip body 9 is made of stainless steel (possessing good elasticity and wear resistance), with an overall "U" shape, a length of 20mm-25mm, a width of 5mm-8mm, and a thickness of 0.5mm-0.8mm. Its inner side, which contacts the pen barrel, is polished to reduce friction damage. The pen clip connector 10 consists of two small plastic clips, injection molded from polypropylene (PP). The inner diameter of the clips matches the outer diameter of the pen barrel 4 (forming an interference fit). The outer side of the clips has slots that fit the pen clip body 9, with a depth of 0.3mm-0.5mm. During assembly, first, the pen clip connector 10 is placed on the corresponding position of the pen barrel 4, and then both ends of the pen clip body 9 are inserted into the slots of the pen clip connector 10. Through the combined effect of the interference fit and the slot's limiting function, the pen clip 3 is securely fixed to the outside of the pen barrel 4, with the clamping force controlled between 2N and 4N, ensuring stability during carrying and facilitating one-handed insertion and removal.

[0033] Optionally, the dual-color highlighter tip 2 has a dual-head structure and contains a highlighter core. The end of the pen is provided with a pen cap 11, which cooperates with the end of the dual-color highlighter tip 2 away from the pen cap 1 to protect the internal highlighter core.

[0034] Specifically, the dual-color highlighter tip 2 is made of ABS engineering plastic (combining rigidity and ease of processing), and integrates two different colored highlighter cartridges (such as blue and yellow). The highlighter cartridges are made of fiber material, with a diameter of 1mm to 1.5mm and a length of 15mm to 20mm. The end cap 11 is made of polyethylene (PE) material by injection molding, with an inner diameter 0.2mm to 0.3mm larger than the outer diameter of the dual-color highlighter tip 2 (forming a clearance fit), and a length of 8mm to 10mm. The inner wall is provided with a ring of raised ribs, with a height of 0.5mm to 0.8mm. When the end cap 11 is fitted onto the dual-color highlighter tip 2, the raised ribs and the end face of the highlighter tip form a slight compression, generating a pull-out force of 1N to 2N, which not only ensures a stable connection and prevents it from falling off, but also allows the user to easily remove the cap with one hand.

[0035] Optionally, the outer surface of the twisting part 5 is provided with anti-slip texture, which is evenly distributed along the circumference of the twisting part 5.

[0036] Specifically, the twisting part 5 is injection molded from polycarbonate (PC) material. The anti-slip texture on the outer surface is a ring-shaped groove structure with a groove depth of 0.3mm to 0.5mm, a width of 0.8mm to 1mm, and a spacing of 1mm to 1.2mm between adjacent grooves. The texture is evenly distributed circumferentially (12 to 16 grooves in total). The anti-slip texture design increases the friction between the fingers and the twisting part 5, ensuring that it is not easy to slip during twisting operation, improving the feel and stability of use.

[0037] Optionally, the inner wall of the sheath 6 is adapted to the outer wall of the pen tip 7, and when the pen tip 7 is retracted, the sheath 6 covers the exposed part of the pen tip 7.

[0038] Specifically, the sleeve 6 is made of silicone (which has good elasticity and wear resistance), and its inner diameter is 0.1mm to 0.2mm larger than the outer diameter of the pen tip 7 (forming a clearance fit). Its length is 10mm to 12mm, and the inner wall is smoothed to reduce the frictional resistance when the pen tip 7 is extended or retracted. When the pen tip 7 is retracted, the sleeve 6 can completely cover the exposed part of the pen tip 7, which can play a role in preventing dust and wear. At the same time, the elasticity of the silicone material can buffer the impact force when the pen tip 7 is retracted, thus extending the service life of the pen tip.

[0039] Optionally, the connection between the pen barrel 4 and the twisting part 5 is provided with a circumferential limiting protrusion, and the corresponding position of the twisting part 5 is provided with a matching limiting groove to limit the axial displacement of the twisting part 5 relative to the pen barrel 4.

[0040] Specifically, the pen barrel 4 is injection molded from polypropylene (PP). The outer wall of the end connecting to the twisting part 5 has a circumferential limiting protrusion with a height of 0.5mm–0.8mm and a width of 1mm–1.2mm. The corresponding position of the twisting part 5 has an annular limiting groove, the depth of which matches the height of the protrusion, and the width of which matches the width of the protrusion. During assembly, the limiting groove of the twisting part 5 is aligned with the limiting protrusion of the pen barrel 4, and axial pressing is performed to achieve circumferential limiting, restricting the axial displacement of the twisting part 5 relative to the pen barrel 4 (axial movement ≤0.1mm), ensuring the stability of the screw drive, and preventing inconsistent lead lengths due to axial movement.

[0041] Optionally, the writing refill is a universal refill for push-button pens, and the pen barrel 4 has a limiting structure inside that is compatible with the universal refill.

[0042] Specifically, the internal limiting structure of the pen barrel 4 is an annular boss. The inner diameter of the boss is 0.2mm to 0.3mm smaller than the outer diameter of the universal pen refill (forming an interference fit), and the axial height of the boss is 2mm to 3mm. The edges are rounded by 0.5mm to facilitate the insertion of the pen refill. After the universal pen refill is inserted into the pen barrel 4, its tail rests against the annular boss, achieving axial limiting and ensuring that the pen refill will not move axially due to force during writing, thus guaranteeing the stability and continuity of writing.

[0043] Optionally, the inner side of the pen cap 1 is provided with an elastic buckle, and the outer wall of the dual-color fluorescent pen tip 2 is provided with a corresponding buckle groove. When the pen cap 1 covers the dual-color fluorescent pen tip 2, the elastic buckle engages and is fixed with the buckle groove.

[0044] Specifically, the pen cap 1 is injection molded from polyethylene (PE). The inner elastic buckle consists of three evenly distributed "L"-shaped structures made of thermoplastic polyurethane (TPU) (Shore hardness 60°~70°). It is integrally molded with the inner wall of the pen cap 1 through a secondary injection molding process. The engagement end of the buckle has a thickness of 0.5mm~0.8mm and a length of 3mm~4mm. The outer wall of the dual-color highlighter tip 2 has a corresponding annular buckle groove with a width of 0.6mm~0.9mm and a depth of 0.4mm~0.6mm. When the pen cap 1 covers the dual-color highlighter tip 2, the elastic buckle deforms under pressure and embeds into the buckle groove. The elastic recovery force of the TPU achieves a tight engagement. After engagement, the axial pull-out force of the pen cap 1 is controlled between 2N and 3N, ensuring a stable connection that is not easily detached, while also allowing the user to easily remove the cap with one hand.

[0045] Optionally, the connection strength between the twisting part 5 and the sheath 6 is greater than the lead-out resistance of the writing pen refill, so as to ensure that the sheath 6 remains relatively fixed when the twisting part 5 is twisted.

[0046] Specifically, the twisting part 5 and the sheath 6 are connected by a thread. The thread is a single-start right-hand fine thread with a major diameter of 6mm to 7mm, a minor diameter of 5.2mm to 6.2mm, a pitch of 0.8mm to 1mm, and an effective thread length of 5mm to 6mm. During assembly, the twisting part 5 and the sheath 6 are screwed together until their end faces are in contact. At this point, the connection strength of the thread can withstand an axial tensile force of ≥5N, while the lead ejection resistance of the writing pen refill is usually 1N to 2N. Therefore, the connection strength between the twisting part 5 and the sheath 6 is much greater than the lead ejection resistance, ensuring that the sheath 6 remains relatively fixed when the twisting part 5 is twisted, thus achieving precise lead ejection or retraction of the writing pen refill.

[0047] Based on the above embodiments, this application also provides a pen with a twisting lead-out structure, which includes a first functional pen tip, a second functional pen tip, a fixed pen barrel, a twisting connector, a sheath, and a pen cap. The first functional pen tip is connected to the functional pen lead inside the fixed pen barrel. The twisting connector is located between the fixed pen barrel and the sheath and forms a transmission connection with both of them. The twisting connector has a threaded or slotted structure inside that corresponds to the fixed pen barrel and the sheath, and is connected to the transmission structure of the functional pen lead. The second functional pen tip is located at the end of the fixed pen barrel away from the first functional pen tip, and the pen cap is detachably covered on the second functional pen tip. When the twisting connector is twisted, the functional pen lead is rotated and moved axially through the helical transmission of the thread or slot, thereby realizing the lead-out or lead-out of the first functional pen tip.

[0048] In addition to the combination of writing and fluorescent marking, this pen with a twist-out lead structure can also meet the following functional combination needs, adapting to different usage scenarios:

[0049] 1. Combination of writing and drawing functions

[0050] For example, the first function tip is a regular writing tip (for writing text), and the second function tip is a drawing tip (such as a comic pen tip, suitable for drawing comic sketches with rich line variations); or the first function tip is a fine tip (suitable for detailed depiction in engineering drawings), and the second function tip is a wide tip (suitable for filling large areas in engineering drawings). By switching between these functions, users can flexibly switch between writing and drawing scenarios to meet different creative needs.

[0051] 2. Combination of writing and marking functions

[0052] The primary function of the pen tip is a regular writing tip (for writing content), and the secondary function is a multi-color marking tip (such as a red and green dual-color marking tip, suitable for marking important content in various ways); or the primary function is an erasable pen tip (suitable for temporary drafts), and the secondary function is a permanent marking tip (suitable for final marking of content). It is suitable for scenarios requiring a combination of writing and marking, such as studying and working.

[0053] 3. Functional pen tip combination

[0054] The primary function tip is the standard writing tip (responsible for the main function), and the secondary function tip is the auxiliary function tip, for example:

[0055] Touch head (used for touch operation of electronic devices);

[0056] Illumination head (built-in miniature LED light for writing in dim environments);

[0057] Laser head (for simple laser pointing).

[0058] It is suitable for various scenarios such as office work and outdoor operations that require a combination of "writing and auxiliary functions".

[0059] These functional combinations are all based on the design of "twisted core extension structure + dual-function pen tip". By combining two different pen tips, a single pen can be adapted to multiple scenarios, reducing the burden of carrying multiple pens and improving ease of use.

[0060] This application embodiment also includes a pen tip switching device, which enables a first functional pen tip to extend or retract. The pen tip switching device includes a fixed pen barrel and a torsion connector. The fixed pen barrel is kept relatively fixed to the second functional pen tip, and the torsion connector is linked to the first functional pen tip. A threaded structure is provided between the torsion connector and the fixed pen barrel. When the torsion connector is twisted, the transmission action of the threaded structure can drive the first functional pen tip linked to it to extend or retract axially relative to the fixed pen barrel, thereby enabling the extension or retraction of the first functional pen tip and completing the switching of pen tip functions.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating pen, characterized in that, The pen includes a dual-color highlighter tip (2), a clip (3), a barrel (4), a twisting part (5), a sheath (6), and a pen tip (7). The pen tip (7) is connected to the writing pen refill inside the barrel (4). The twisting part (5) is located between the barrel (4) and the sheath (6) and is connected to both of them. The twisting part (5) has a threaded or slotted structure corresponding to the barrel (4) and the sheath (6) and is connected to the transmission structure of the writing pen refill. The dual-color highlighter tip (2) is located at the end of the barrel (4) away from the pen tip (7). The pen cap (1) is detachably covered on the dual-color highlighter tip (2). When the twisting part (5) is twisted, the writing pen refill is rotated and moved axially through the spiral transmission of the thread or slot, so as to realize the pen tip (7) retracting or extending.

2. The rotating pen according to claim 1, characterized in that, The pen clip (3) includes a pen clip body (9) and a pen clip connector (10). The pen clip connector (10) is located between the pen clip body (9) and the pen barrel (4) to fix the pen clip body (9) to the outside of the pen barrel (4).

3. The rotating pen according to claim 1, characterized in that, The dual-color fluorescent pen tip (2) has a dual-head structure and contains a fluorescent pen core. The end of the rotating pen is provided with a pen tail cap (11). The pen tail cap (11) cooperates with the end of the dual-color fluorescent pen tip (2) away from the pen cap (1) to protect the internal fluorescent pen core.

4. The rotating pen according to claim 1, characterized in that, The outer surface of the twisting part (5) is provided with anti-slip texture, which is evenly distributed along the circumference of the twisting part (5).

5. The rotating pen according to claim 1, characterized in that, The inner wall of the sheath (6) is adapted to the outer wall of the pen tip (7). When the pen tip (7) is retracted, the sheath (6) covers the exposed part of the pen tip (7).

6. The rotating pen according to claim 1, characterized in that, The pen barrel (4) and the twisting part (5) are provided with a circumferential limiting protrusion, and the corresponding position of the twisting part (5) is provided with a matching limiting groove to limit the axial displacement of the twisting part (5) relative to the pen barrel (4).

7. The rotating pen according to claim 1, characterized in that, The writing pen refill is a universal refill for push-button pens, and the pen barrel (4) has a limiting structure inside that is compatible with the universal refill.

8. The rotating pen according to claim 1, characterized in that, It also includes a pen cap (1), the inner side of which is provided with an elastic buckle, and the outer wall of the dual-color fluorescent pen tip (2) is provided with a corresponding buckle groove. When the pen cap (1) covers the dual-color fluorescent pen tip (2), the elastic buckle engages and is fixed with the buckle groove.

9. The rotating pen according to claim 1, characterized in that, The connection strength between the twisting part (5) and the sheath (6) is greater than the lead-out resistance of the writing pen, so as to ensure that the sheath (6) remains relatively fixed when the twisting part (5) is twisted.

10. A pen with a twisting core-ejection structure, characterized in that, The device includes a first functional pen tip, a second functional pen tip, a fixed pen barrel, a torsion connector, a protective sleeve, and a pen cap. The first functional pen tip is connected to a functional pen refill inside the fixed pen barrel. The torsion connector is located between the fixed pen barrel and the protective sleeve and forms a transmission connection with both. The torsion connector has a threaded or grooved structure corresponding to the fixed pen barrel and the protective sleeve, and is connected to the transmission structure of the functional pen refill. The second functional pen tip is located at the end of the fixed pen barrel away from the first functional pen tip, and the pen cap is detachably covered on the second functional pen tip. When the torsion connector is twisted, the functional pen refill is rotated and moved axially through the helical transmission of the threaded or grooved structure, thereby realizing the extension or retraction of the first functional pen tip.

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