Silent push pen

Abstract

The patent discloses a mute push pen, which comprises a pen barrel, a pen neck, the pen neck being detachably connected to the front end of the pen barrel, a pen core assembly being accommodated in the cavity formed by the pen barrel and the pen neck and being capable of moving in the axial direction between an extended position and a retracted position, an elastic reset element applying a reset force in the retraction direction to the pen core assembly, a push execution mechanism being arranged in the pen barrel and being linked with the pen core assembly, the push execution mechanism being configured to drive the pen core assembly to perform a non-impact mute switching between the extended position and the retracted position in response to an axial pressing operation through a bevel sliding fit, and an ornament being rotatably supported on the rear end of the pen barrel via a bearing, so that the ornament can freely rotate relative to the pen barrel and can transmit an axial pressing force to the push execution mechanism.

Description

Technical Field

[0001] This patent relates to the field of silent writing instruments, specifically to a silent press-operated pen. Background Technology

[0002] While the core function of a pen as a basic writing tool has remained fundamentally unchanged for many years, users' expectations for its added value are constantly increasing. Especially among students and young office workers, stationery is not only a tool for recording, but also a vehicle for personal expression and emotional management. Currently, the push-button pen market suffers from the following prominent user experience pain points: First, the positioning mechanism of traditional push-button pens generally relies on the hard impact of ratchet teeth or latches to switch states. The "click" sound produced with each press creates noise interference in quiet environments such as classrooms and libraries, failing to meet users' widespread need for a quiet environment. Furthermore, in today's fast-paced learning and work environment, users face increasing mental stress and need simple and convenient ways to obtain immediate psychological relief. Stationery with operable components, especially those allowing users to perform unconscious, repetitive manual operations, is considered by psychological research to effectively help users distract themselves and alleviate anxiety. Therefore, in recent years, adding rotating, flicking, or playable decorative parts to the back of pens has become a significant product design trend. Such designs aim to transform writing tools from single-function products into composite personal items that combine writing and emotional regulation functions. Furthermore, to accommodate the industry-standard refill length (approximately 110mm), the overall length of a standard click pen is limited to around 150mm. Simply adding a rotating decorative module to this length would significantly increase the overall pen length. An excessively long pen barrel prevents the thumb and forefinger from naturally covering the effective grip area, making operation difficult and violating basic ergonomic principles, severely impacting writing comfort and control stability. Therefore, a compact pen barrel design must be achieved first to allow for the addition of decorative components without sacrificing ergonomics.

[0003] In conclusion, the market urgently needs a comprehensive solution that can simultaneously address silent operation, compact structure, and stress relief, enabling the stylus to evolve into a modern product that is ergonomic, respects the public environment, and meets users' psychological needs while maintaining its core writing function. Utility Model Content

[0004] The purpose of this patent is to provide a silent click pen that achieves a fusion of silent clicking and fun display functions within a limited space by using a unique inclined surface drive mechanism between its internal rotating wheel and ratchet structure, and integrating a low-resistance rotating ornament at the top of the pen barrel. This significantly improves the silent experience and product fun during operation, while optimizing the overall pen length to a comfortable ergonomic size, thus improving the grip and writing feel.

[0005] To solve the above-mentioned technical problems, this patent adopts the following technical solution:

[0006] A silent push-button pen includes: a pen barrel and a pen neck, the pen neck being detachably connected to the front end of the pen barrel; a pen refill assembly housed within a cavity formed by the pen barrel and the pen neck, and movable axially between an extended position and a retracted position; an elastic reset element applying a retracted reset force to the pen refill assembly; a push-button actuator disposed within the pen barrel and linked to the pen refill assembly, the push-button actuator being configured to drive the pen refill assembly to perform a silent, impact-free switching between the extended and retracted positions in response to an axial pressing operation via a sliding engagement with an inclined plane; and a decorative piece rotatably supported at the rear end of the pen barrel via a bearing, allowing the decorative piece to rotate freely relative to the pen barrel and to transmit axial pressing force to the push-button actuator.

[0007] Furthermore, when the silent press pen is fitted with a pen refill assembly with a length ≤110 mm, the total length of the pen is ≤145 mm.

[0008] Furthermore, the actuating mechanism includes a rotating wheel, which is axially movable and rotatable within the pen barrel, with its inner wall abutting against the rear end of the pen refill assembly.

[0009] Furthermore, the inner wall of the pen barrel is provided with a first ratchet, and a positioning bushing is also provided inside the pen barrel, the positioning bushing being provided with a second ratchet structure.

[0010] Furthermore, the outer wall of the wheel is provided with a boss.

[0011] Furthermore, the boss is configured to alternately interact with the inclined surfaces of the first and second ratchet structures during the axial reciprocating motion of the wheel, thereby forcing the wheel to rotate in steps.

[0012] Furthermore, the first ratchet is also provided with a second groove at intervals.

[0013] Furthermore, the second groove accommodates the boss in the retracted state to eliminate axial clearance and suppress wobble.

[0014] Furthermore, there are three protrusions evenly distributed in the circumferential direction.

[0015] Furthermore, the tooth pitch of the first and second ratchet structures matches the circumferential spacing of the boss, so that each press causes the wheel to rotate 120° in a step.

[0016] Furthermore, the actuator also includes a push button.

[0017] Furthermore, the pusher is linked to the rotating wheel and cooperates with the pen barrel guide, allowing it to move only axially.

[0018] Furthermore, the inner ring of the bearing is fixed to the rear end of the pusher.

[0019] Furthermore, the bearing is any one of a deep groove ball bearing, a sliding bearing, or a needle roller bearing.

[0020] Furthermore, the pen barrel and the pen neck are connected to each other by threads.

[0021] Furthermore, an anti-loosening structure is provided to prevent the threaded connection from coming loose.

[0022] Furthermore, the elastic reset element is a compression spring.

[0023] Furthermore, the front end of the elastic reset element abuts against the inner step of the pen neck, and the rear end abuts against the flange of the pen refill assembly to provide a reset force.

[0024] Furthermore, the positioning bushing is circumferentially positioned by fitting into the first groove on the inner wall of the pen barrel through the positioning part, and is axially pressed by the shoulder section of the pen neck.

[0025] Furthermore, the shape, material, and surface elements of the ornament can be replaced with any visually or tactilely perceptible structure, and its rotational damping can be adjusted by bearing selection or additional damping grease to provide a differentiated user experience.

[0026] This patent provides a silent click pen, which has the following advantages compared to the prior art:

[0027] Achieved a silent effect:

[0028] By employing a pure inclined surface contact and sliding engagement between the drive boss on the outer wall of the rotating wheel and the second ratchet structure on the inner wall of the pen barrel, and the third ratchet structure on the positioning bushing, the traditional "click" positioning mechanism involving hard impact between parts in a press-type pen is replaced. Throughout the entire pressing and resetting process, the parts achieve smooth rotation and axial displacement through inclined surface guidance, fundamentally eliminating unpleasant mechanical noise, making it particularly suitable for occasions requiring a quiet environment.

[0029] A compact structure was achieved while ensuring functionality.

[0030] This invention optimizes the internal space layout of the pen barrel, highly integrating the silent pressing mechanism (pen barrel, positioning bushing, and rotating wheel) with the rotating decorative module (presser tip, bearing, and decorative element) axially, and adapts to a dedicated pen refill significantly shorter than standard refills (≤110mm). This series of designs allows the total length of the pen to be strictly controlled to approximately 143mm after incorporating complex silent and rotating features, far shorter than conventional products exceeding 150mm. This results in an ergonomic short-barrel design, improving grip stability and writing comfort.

[0031] This ensures the independence and smoothness of the rotating ornament's function.

[0032] Because the rotating ornament is connected to the lower push-button assembly via a bearing, and the push-button assembly, through its long ribs engaging with the pen barrel's guide structure, is strictly limited to axial movement and cannot rotate, this design achieves separation of power transmission: when the user presses the ornament, the force is effectively transmitted to the push-button to drive the lower pressing mechanism; while when the ornament is rotated in the non-pressed state, its rotational force is completely absorbed by the bearing, without interfering with or driving the internal pressing mechanism, thus ensuring extremely smooth rotation of the ornament and reliable pressing function.

[0033] The overall structural connection reliability and stability have been enhanced.

[0034] The pen barrel and neck employ a dual locking structure of threaded connection and raised dot-ring groove anti-loosening, effectively preventing loosening due to reverse rotation of the threads during long-term use. Simultaneously, the positioning bushing achieves circumferential limiting through its rib engaging with the groove on the inner wall of the pen barrel, and is axially pressed by the top surface of the pen neck, forming a rigid internal support frame. This ensures the precise and stable trajectory of internal moving parts (such as the rotating wheel), enhancing the product's durability. Attached Figure Description

[0035] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0036] Figure 1 A schematic diagram of the clef's cross-section for use in the silent mode;

[0037] Figure 2 A three-dimensional schematic diagram of the pen barrel;

[0038] Figure 3 This is a schematic diagram of a sectional view of the pen barrel;

[0039] Figure 4 A three-dimensional perspective diagram of the penholder;

[0040] Figure 5 This is a schematic diagram of the side view of the pen barrel;

[0041] Figure 6 This is a top view diagram of the pen barrel;

[0042] Figure 7 This is a schematic diagram of the penholder from below;

[0043] Figure 8 A three-dimensional diagram of the pen neck;

[0044] Figure 9 This is a schematic diagram of a cross-sectional view of the pen neck;

[0045] Figure 10 This is a side view schematic diagram of the elastic reset element;

[0046] Figure 11 A three-dimensional schematic diagram of the positioning bushing;

[0047] Figure 12 This is a schematic diagram of the side view of the positioning bushing;

[0048] Figure 13 This is a three-dimensional schematic diagram of the rotating wheel;

[0049] Figure 14 This is a side view of the rotor;

[0050] Figure 15 This is a schematic diagram of a cross-sectional view of the impeller;

[0051] Figure 16 This is a top view diagram of the rotary wheel;

[0052] Figure 17 This is a side view of the pen refill assembly.

[0053] Figure 18 This is a three-dimensional schematic diagram of the pusher head structure;

[0054] Figure 19 This is a schematic diagram of the side view of the push button;

[0055] Figure 20 This is a schematic diagram of a cross-sectional view of the pusher head;

[0056] Figure 21 This is a schematic diagram of the top view of the pusher head;

[0057] Figure 22 This is a schematic diagram of the decorative component structure;

[0058] Figure 23 This is a sectional view of the trim piece;

[0059] Figure 24 This is a side view of the bearing.

[0060] Figure 25 This is a top view of the bearing.

[0061] Figure 26 View of the bearing and pusher assembly;

[0062] Figure 27 Side view of the pen being pressed;

[0063] Figure 28 Perspective view of the pen being pressed when the lead is in the extended position;

[0064] Figure 29 This is a schematic diagram showing the position of the rotating wheel when the pen refill is in the extended position.

[0065] Figure 30 This is a magnified diagram showing the position of the rotating wheel when the pen tip is in the extended position.

[0066] Figure 31 This is the perspective view of the pen being pressed when the pen retracted;

[0067] Figure 32 This is a schematic diagram showing the position of the rotating wheel when the pen refill is in the retracted position.

[0068] Figure 33 This is a magnified diagram of the position of the retracted pen tip.

[0069] The reference numerals in the attached figures are explained as follows:

[0070] 100: Pen barrel

[0071] 110: Threaded connection section

[0072] 120: Anti-loosening structure

[0073] 130: Guide Structure

[0074] 140: First groove

[0075] 150: First ratchet

[0076] 160: Second groove

[0077] 170: Third groove

[0078] 200: Pen neck

[0079] 210: Mating thread section

[0080] 220: Connecting Section

[0081] 300: Rotary Wheel

[0082] 310: Protrusion

[0083] 350: Boss

[0084] 360: Bevel

[0085] 400: Positioning bushing

[0086] 420: Shoulders

[0087] 440: Positioning Department

[0088] 450: Second ratchet

[0089] 500: Elastic reset element

[0090] 600: Pen refill assembly

[0091] 610: Pen Tip

[0092] 620: Pen tube

[0093] 660: Contact Department

[0094] 700: Pressing head

[0095] 710: The First Subject

[0096] 720: Second Subject

[0097] 740: Card Section

[0098] 770: Long tendons

[0099] 810: Ornaments

[0100] 870: Bearing Detailed Implementation

[0101] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0102] This specification also uses several compound terms to describe devices, components, equipment, etc. that include more than one function, or to assign additional functions to a corresponding device, component, equipment, etc. Those skilled in the art will understand that such compound terms can be implemented by a single or multiple devices, components, equipment, etc., as long as they are reasonable under the interpretation rules of this patent terminology.

[0103] It should be noted that in this specification, similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and interpreted in subsequent figures. In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined as having the following meanings:

[0104] The terms “comprising” or “having” have the same meaning as “containing”, and also include other forms of the term, such as the gerund and singular forms in English, meaning including but not limited to, and not intended to exclude, for example, other elements, components, integers or steps.

[0105] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0106] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0107] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0108] All references cited in this application are incorporated herein by way of quotation, to the extent that they do not contradict the disclosure herein. It will be apparent to those skilled in the art that products (apparatus, components, devices, compounds, compositions, materials, etc.) and methods (processes, steps, conditions, parameters, equipment, and test methods, equipment, etc.) not specifically described herein can be applied to the implementation of the patented creation fully disclosed herein without the need for excessive experimentation. This patent is intended to cover all functional equivalents known in the art of the methods, apparatus, apparatus components, materials, processes, and techniques specifically described herein. All cited references include:

[0109] The following publications are included: Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to the filing date of this application), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to the filing date of this application), published by Wiley; Machinery's Handbook (32nd edition and other editions prior to the filing date of this application), published by Industrial Press Inc.; Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Cheng Daxian, published by Chemical Industry Press; and Modern Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Wen Bangchun, published by Machinery Industry Press.

[0110] It should be noted that, for ease of description and understanding, this patent document may use directional terms such as "left," "right," "up," "down," "axial," and "lateral." These terms are all based on the orientation shown in the drawings or the relative positional relationships of the components in their normal use state, and should not be construed as an absolute limitation on the scope of protection of this utility model. For those skilled in the art, in conjunction with the full text of the specification and the drawings, it can be understood that the essence of these directional descriptions is to clarify the relative connection and cooperation relationships of the components. Therefore, any equivalent transformation of the orientation or position of the components based on the essential concept of this utility model should be included within the scope of protection of the claims of this patent. For ease of description, the following orientations are defined in this specification: with the normal writing posture of the pen as the reference, the direction of the pen tip is the "front end," and the direction of the pen tail pressing is the "rear end." "Axial" refers to the length direction of the pen barrel, and "radial" refers to the direction perpendicular to the axial direction. The terms "inner" and "outer" refer to the contour of the pen barrel or component; closer to the central axis is "inner," and vice versa.

[0111] Combination Figures 2 to 7 As shown, the pen barrel 100 is roughly a hollow tubular structure. A threaded connection section 110 is machined on the inner side of its front end, designed to reliably connect with the corresponding threaded structure of the pen neck 200. From the threaded connection section 110 backwards, several functional structures are sequentially integrated on the inner side of the pen barrel 100: a first anti-loosening structure 120, used to effectively prevent loosening of the connection after the pen neck 200 is tightened by a combination of an annular groove and a protrusion; a guide structure 130, which guides and positions the protrusion during assembly; a first groove 140, used to form a stable fit with the positioning part 440 of the positioning bushing 400; a first ratchet 150 is provided at the rear end of the inner wall of the pen barrel 100, which consists of multiple circumferentially evenly distributed inclined tooth-like structures, with multiple second grooves 160 regularly spaced between the teeth; and a third groove 170 extending axially is also machined at the rear end of the inner wall of the pen barrel 100, which forms a precise sliding fit with the long rib 770 of the pusher head 700. The coordinated design of these structures ensures precise guidance and reliable operation of the internal moving parts.

[0112] See Figures 8 to 9As shown, the pen neck 200, as a front connecting component, achieves a secure screw-in connection with the threaded connection section 110 of the pen barrel 100 via the mating threaded section 210 at the rear end of its outer wall. After the abutment section 220 at the rear end of the pen neck 200 is fully screwed into the pen barrel 100, the rear end face of the abutment section 220 tightly presses against the front end face of the shoulder 420 of the positioning bushing 400 in the axial direction, providing an axial positioning reference for the internal components. In particular, the abutment section 220 has an annular groove (not shown in the figure) machined on its outer circumference. This annular groove forms a locking fit with the first anti-loosening structure 120 on the inner wall of the pen barrel 100, together forming a double anti-loosening guarantee, effectively preventing the pen neck 200 from rotating out of control during use.

[0113] See Figures 10-12 As shown in the schematic diagram, the positioning bushing 400 is disposed inside the pen barrel 100 for circumferential positioning and provides a ratchet surface that mates with the drive wheel. A shoulder 420 is located at the front of the outer wall of the positioning bushing 400, with an outer diameter slightly larger than the main body of the positioning bushing 400, thus forming a radially protruding stepped structure. After assembly, the lower end face of the shoulder 420 abuts axially against the top face of the abutment section 220 at the rear end of the pen neck 200. A positioning part 440 is disposed above the shoulder 420 of the positioning bushing 400 and extends upward along its outer wall, forming at least one long rib-like structure. The positioning part 440 engages with the first groove 140 inside the pen barrel 100, effectively preventing relative rotation of the positioning bushing 400 inside the pen barrel 100. The guide structure 130 on the pen barrel 100 guides and aligns the positioning part 440 during assembly. The second ratchet 450 is located at the rear end of the positioning bushing 400 and consists of multiple circumferentially distributed tooth-like structures with beveled surfaces. The tooth shape of the second ratchet 450 corresponds to the first ratchet 150 at the top of the pen barrel 100, and the two together form a functional surface that interacts with the drive boss on the drive wheel.

[0114] During assembly, the positioning bushing 400 is inserted from the front end of the pen barrel 100, and its positioning part 440 slides along the guide structure 130 and finally engages in the first groove 140 to achieve circumferential fixation. When the pen neck 200 is screwed into the pen barrel 100, the end face of its abutment section 220 presses axially against the front end face of the shoulder 420 of the positioning bushing 400, thereby firmly fixing the positioning bushing 400 inside the pen barrel 100, preventing it from moving axially and radially, thus forming a stable internal support frame.

[0115] See Figures 13-16The rotating wheel 300 is axially movable and rotatable within the pen barrel 100 and located behind the positioning bushing 400. A protrusion 310 is provided on the rear end face of the rotating wheel 300. In this embodiment, the protrusion 310 is a plurality of (e.g., four) small stepped structures distributed circumferentially. The protrusion 310 contacts the drive end of the pusher and transmits axial pressing force. A boss 350 is provided on the outer wall of the rotating wheel 300. The boss 350 is a plurality of (e.g., three) block-shaped structures evenly distributed circumferentially; specifically, both the front and rear sides of the boss are designed with a specific angle of bevel. Preferably, the boss is a triangular block. Since both the front and rear sides of the boss 350 are designed with bevels, its front bevel interacts with the second ratchet 450 of the positioning bushing 400, and its rear bevel interacts with the first ratchet 150 of the pen barrel 100. The inner wall of the rotating wheel 300 has an inwardly inclined surface 360 ​​on its front side. This inclined surface 360 ​​is always in contact with the contact portion 660 at the rear end of the pen refill assembly, which is used to convert the axial movement of the rotating wheel 300 into the axial movement of the pen refill assembly, and pushes the rotating wheel 300 to move backward when the pen refill is reset. The rotating wheel 300 is forced to rotate periodically during the pressing and resetting process by engaging the inclined surfaces of the first ratchet 150 and the second ratchet 450 with its boss 350, thereby realizing the silent switching of the pen refill assembly between the extended position and the retracted position.

[0116] See Figure 17 The pen refill assembly 600 serves as the core carrier for writing functionality. Its front end features a precisely shaped pen tip 610, the middle section houses the pen tube 620 for storing writing medium, and the rear end is a contact portion 660. This contact portion 660 maintains stable contact with the guide slope 360 ​​on the inner wall of the rotating wheel 300 after the entire pen is assembled. The pen refill assembly 600 employs a compact design, with its overall length significantly shorter than a standard pen refill (≤110mm). Through the continuous engagement between its rear contact portion 660 and the guide slope 360 ​​of the rotating wheel 300, the pen refill assembly 600 reliably transmits the precise axial movement of the rotating wheel 300 to itself. Simultaneously, under the action of the elastic reset element 500, it achieves smooth forward and backward movement, ensuring the extension and retraction of the pen tip 610.

[0117] See Figures 18-21This is a schematic diagram of the press head structure. The press head 700 directly receives user pressure input and transmits power. Its overall shape is roughly stepped shaft, assembled into the interior from the front end of the pen barrel 100. The press head 700 adopts a multi-segment design to achieve precise fit and functional transmission with different components. The first body 710 is located at the front end of the press head 700 and is a cylindrical segment with a large outer diameter. The front end face of the first body 710 contacts the protrusion 310 at the rear end of the rotating wheel 300 and transmits axial pressing force. When the user presses, the first body 710 pushes the rotating wheel 300 forward. The second body 720 is located at the rear end of the press head 700 and is a cylindrical segment with a small outer diameter. The second body 720 is used to support and fix the bearing. Long ribs 770 are located on the outer wall of the first body 710 and are at least two radially extending axially. The long rib 770 slides into the third groove 170 at the rear end of the pen barrel 100, thereby restricting the press head 700 to move only axially and preventing relative rotation, ensuring linear transmission of the pressing action. The engaging portion 740, located on the outer wall of the second body 720, consists of multiple circumferentially distributed radial protrusions. The engaging portion 740 is used to form an interference fit or other fixed connection with the bearing, thereby firmly fixing the bearing to the rear end of the press head 700. This structure ensures synchronous axial movement of the bearing and the press head 700, while allowing the trim to rotate freely relative to the press head 700.

[0118] In the overall assembly, the pusher 700 achieves guidance and anti-rotation through the cooperation of its long rib 770 with the third groove 170 of the pen barrel 100, transmits pressing pressure through the contact between its first body 710 and the protrusion 310 of the rotating wheel 300, and fixes the bearing through its locking part 740, thereby integrating the pressing and rotation functions.

[0119] See Figures 22-25 This is a schematic diagram of the decorative element module, integrated at the rear end of the pen barrel assembly. This module enables product personalization, fun features, and stress relief. While ensuring reliable transmission of the pressing function, it also allows for independent and free rotation of the decorative element. The inner ring of the bearing 870 is interference-fitted with the engaging portion 740 on the second body 720 of the press head 700, thus fixing it to the rear end of the press head 700. The outer ring of the bearing 870 is fixedly connected to the decorative element 810. The decorative element 810 is a rotatable component, internally fixedly connected to the outer ring of the bearing 870 to provide dynamic visual and / or tactile feedback. Through this structure, the decorative element module achieves separation of power transmission: when the user presses the decorative element 810, the pressure is transmitted to the press head 700 through the outer and inner rings of the bearing 870, thereby driving the pressing actuator below. When the user rotates the ornament 810 in the non-pressed state, the rotational force is only applied to the outer ring of the bearing 870 and is completely absorbed by the bearing structure. It will not drive the pusher head 700 or the internal mechanism to rotate, thus ensuring the smooth rotation of the ornament and the reliability of the pressing function.

[0120] Ornament 810 is constructed as a standalone, replaceable functional module. (See attached image) Figure 22 and Figure 23 As shown, the decorative element 810 is detachably and fixedly connected to the outer ring of the bearing 870 via its internal connecting structure. In one specific embodiment, this standardized connecting structure can be an interference fit snap-fit ​​structure, a miniature threaded connection structure, or a magnetic structure. This modular design allows manufacturers to quickly develop multiple product models based on a common pen body platform by changing the decorative element 810 in different shapes, materials, or colors to meet diverse market demands, while reducing the inventory risk and mold costs of a single product model. Furthermore, the rotational system formed by the decorative element 810 and the bearing 870 has its rotational damping precisely configured within a predetermined threshold range. This damping value is precisely adjusted by selecting the bearing 870 (e.g., using a deep groove ball bearing with a certain preload or a sliding bearing filled with a specific grease) or by filling the bearing cavity with damping grease of a specific viscosity. The lower limit of the predetermined threshold range is set as the minimum damping that provides clear tactile feedback to ensure sufficient tactile quality during rotation; the upper limit is set as the maximum damping that effectively suppresses the free rotation of the ornament 810 due to its own inertia for extended periods, thereby avoiding interference caused by its arbitrary rotation during non-operational states. By controlling the rotational damping within this threshold range, this invention not only provides users with stable, smooth, and high-quality tactile feedback during rotation, but also fundamentally solves the problem of thin or asymmetrical ornaments rotating freely due to inertia, improving the overall user experience and perceived quality of the product.

[0121] Optionally, bearing 870 is not limited to deep groove ball bearings, but can also be a sliding bearing, needle roller bearing, or other low-resistance rotary support structure. As these are common mechanical mechanisms, they will not be described in detail here. The shape, material, and design of trim 810 can be diversified according to market demands.

[0122] See Figure 1 , Figure 27 This is a schematic diagram of the overall assembly of a short-bar silent click pen according to an embodiment of the present invention. The following will systematically describe the cooperation relationships between the various components:

[0123] The pen barrel 100 serves as the main support, with its threaded connecting section 110 at the front end engaging with the mating threaded section 210 of the pen neck 200, thus fixing the pen neck 200 to the front end of the pen barrel 100. The abutting section 220 at the rear end of the pen neck 200 presses backward against the front end face of the shoulder 420 of the positioning bushing 400. The positioning bushing 400 is circumferentially fixed by engaging with the first groove 140 on the inner wall of the pen barrel 100 through the positioning part 440 on its outer wall. The rotating wheel 300 is housed inside the pen barrel 100 and located behind the positioning bushing 400. The boss 350 on its outer wall is located between the first ratchet 150 of the pen barrel 100 and the second ratchet 450 of the positioning bushing 400. The protrusion 310 at the rear end of the rotating wheel 300 abuts against the front end face of the first body 710 of the pusher head 700. The push-button 700 extends beyond the rear end of the pen barrel 100, with its central long rib 770 slidingly engaging with the third groove 170 at the rear end of the pen barrel 100, allowing it to move only axially. The locking portion 740 at the rear end of the push-button 700 is fixedly fitted with the inner ring of the bearing 870. The decorative piece 810 is fixedly connected to the outer ring of the bearing 870, thus forming a complete decorative piece module. The pen refill assembly 600 passes through the central hole at the front end of the pen neck 200, with its rearmost tip contact portion 630 maintaining contact with the guide slope 360 ​​on the inner wall of the rotating wheel 300. The elastic reset element 500, fitted onto the pen refill assembly 600, provides an elastic force to reset the pen refill assembly 600 backward. Through the cooperation of the above components, this invention integrates two major functions—silent pressing and rotating decorative pieces—within a compact space, and optimizes the overall length.

[0124] See Figures 28 to 30This diagram illustrates the extended state of the short-barreled silent press-button pen and its internal structure. When pressed by the user, the pusher pushes the rotating wheel, which in turn pushes the pen tip assembly 600 forward against the force of the elastic reset element 500, causing the pen tip 610 to stably extend from the opening at the front of the pen neck 200, placing it in a ready-to-write position. At this time, the positions and mating relationships of the internal components are as follows: The rotating wheel 300 has rotated relative to its initial pressing position. The rear slope of the boss 350 on its outer wall abuts against the slope of the first ratchet 150 inside the pen barrel 100, and is locked behind the first ratchet 150. This mating relationship effectively prevents the rotating wheel 300 from continuing to move backward under the action of the elastic reset element, thereby locking the pen tip assembly 600 in the extended position. Simultaneously, the positioning bushing 400 remains fixed, and its top second ratchet 450 disengages from the boss 350 of the rotating wheel 300. After the external pressing pressure is released, the pusher 700 springs back to its rear position under the push of the rotating wheel. The rotating decorative module (including bearing 870 and decorative part 810) fixed to its end also returns to its original position. This extended state is achieved through the self-locking effect achieved by the inclined contact and sliding between the rotating wheel 300 and the first ratchet 150, avoiding the impact noise of traditional structures and demonstrating the quiet operation of this invention. The entire mechanism is in a stable mechanical equilibrium state until the next pressing operation, at which point the state changes.

[0125] See Figures 31 to 33 It is a state diagram of the short rod silent press pen switching from the extended state to the retracted state.

[0126] When the pen is in the extended position, the user presses the trim 810 axially again. The pressure is transmitted through the pusher 700 to the rotating wheel and then to the pen refill assembly, pushing it forward against the elastic force of the resilient reset element. During this forward movement, the inclined surface of the boss 350 on the outer wall of the rotating wheel 300 contacts and slides relative to the inclined surface of the second ratchet 450 of the fixed positioning bushing 400. This inclined surface interaction forces the rotating wheel 300 to rotate about its axis by a predetermined angle, disengaging its boss 350 from the first ratchet 150 of the pen barrel 100.

[0127] When the user releases the pressure, the resilient reset element pushes the pen refill assembly 600 backward, and its top contact 630 pushes against the guide ramp of the rotating wheel 300, causing the rotating wheel 300 to move backward as well. Since the rotating wheel 300 has already rotated to a specific angle during the previous movement, its boss 350 aligns with the second groove 160 on the inner wall of the pen barrel 100 along its backward movement path. Therefore, the boss 350 smoothly slides into and is accommodated within the second groove 160 (as shown in the image). Figure 33As shown in the diagram, the pen tip 610 of the retracted pen assembly 600 is fully retracted into the pen neck 200. The boss 350 of the rotating wheel 300 is accommodated in the second groove 160. The pusher 700 and the rotating trim module are reset to their final positions by the elastic reset element. The entire mechanism reaches a stable mechanical balance again, and the pen tip is safely stored until the next press triggers the state switch. The completion of this retracted pen tip process marks the end of a complete silent pressing cycle.

[0128] Industrial application

[0129] This patent provides a silent click pen, which has the following advantages compared to the prior art:

[0130] Achieved a silent effect:

[0131] By employing a pure inclined surface contact and sliding engagement between the drive boss on the outer wall of the rotating wheel and the second ratchet structure on the inner wall of the pen barrel, and the third ratchet structure on the positioning bushing, the traditional "click" positioning mechanism involving hard impact between parts in a press-type pen is replaced. Throughout the entire pressing and resetting process, the parts achieve smooth rotation and axial displacement through inclined surface guidance, fundamentally eliminating unpleasant mechanical noise, making it particularly suitable for occasions requiring a quiet environment.

[0132] A compact structure was achieved while ensuring functionality.

[0133] This invention optimizes the internal space layout of the pen barrel, highly integrating the silent pressing mechanism (pen barrel, positioning bushing, and rotating wheel) with the rotating decorative module (presser tip, bearing, and decorative element) axially, and adapts to a dedicated pen refill significantly shorter than standard refills (≤110mm). This series of designs allows the total length of the pen to be strictly controlled to approximately 143mm after incorporating complex silent and rotating features, far shorter than conventional products exceeding 150mm. This results in an ergonomic short-barrel design, improving grip stability and writing comfort.

[0134] This ensures the independence and smoothness of the rotating ornament's function.

[0135] Because the rotating ornament is connected to the lower push-button assembly via a bearing, and the push-button assembly, through its long ribs engaging with the pen barrel's guide structure, is strictly limited to axial movement and cannot rotate, this design achieves separation of power transmission: when the user presses the ornament, the force is effectively transmitted to the push-button to drive the lower pressing mechanism; while when the ornament is rotated in the non-pressed state, its rotational force is completely absorbed by the bearing, without interfering with or driving the internal pressing mechanism, thus ensuring extremely smooth rotation of the ornament and reliable pressing function.

[0136] The overall structural connection reliability and stability have been enhanced.

[0137] The pen barrel and neck employ a dual locking structure of threaded connection and raised dot-ring groove anti-loosening, effectively preventing loosening due to reverse rotation of the threads during long-term use. Simultaneously, the positioning bushing achieves circumferential limiting through its rib engaging with the groove on the inner wall of the pen barrel, and is axially pressed by the top surface of the pen neck, forming a rigid internal support frame. This ensures the precise and stable trajectory of internal moving parts (such as the rotating wheel), enhancing the product's durability.

[0138] The terminology and expressions used herein are for descriptive purposes only and this patent should not be limited to these terms and expressions. The use of these terms and expressions does not imply the exclusion of any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various possible modifications should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0139] Similarly, it should be noted that although this patent has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate this patent, and various equivalent changes or substitutions can be made without departing from the spirit of this patent. Therefore, any changes or modifications to the above embodiments within the essential spirit of this patent will fall within the scope of the claims of this patent.

Claims

1. A silent press-operated pen, characterized in that, include: Pen barrel and pen neck, wherein the pen neck is detachably connected to the front end of the pen barrel; The pen refill assembly is housed within the cavity formed by the pen barrel and the pen neck, and is axially movable between an extended position and a retracted position. An elastic reset element applies a retractable reset force to the pen refill assembly; A pressing actuator is disposed inside the pen barrel and linked with the pen refill assembly. The pressing actuator is configured to drive the pen refill assembly to perform a silent, impact-free switching between the extended and retracted positions in response to an axial pressing operation via a sloping sliding engagement. The decorative element is rotatably supported at the rear end of the pen barrel via a bearing, allowing the decorative element to rotate freely relative to the pen barrel and to transmit axial pressing force to the pressing actuator.

2. The silent click pen according to claim 1, characterized in that, When the silent press pen is fitted with a pen core assembly with a length ≤110mm, the total length of the pen is ≤145mm.

3. The silent click pen according to claim 1, characterized in that, The pressing actuator includes: a rotating wheel, which is axially movable and rotatably disposed inside the pen barrel, and its inner wall abuts against the rear end of the pen refill assembly; The inner wall of the pen barrel is provided with a first ratchet, and a positioning bushing is also provided inside the pen barrel, the positioning bushing being provided with a second ratchet structure; The outer wall of the wheel is provided with a boss, which is configured to alternately interact with the inclined surfaces of the first ratchet and the second ratchet structures during the axial reciprocating motion of the wheel, so as to force the wheel to produce step rotation.

4. The silent click pen according to claim 3, characterized in that, The first ratchet is also provided with a second groove at intervals, which accommodates the boss in the retracted state to eliminate axial clearance and suppress wobbling.

5. The silent click pen according to claim 4, characterized in that, The bosses are three evenly distributed in the circumferential direction, and the tooth pitch of the first and second ratchet structures matches the circumferential spacing of the bosses, so that each press causes the wheel to rotate 120° in a step.

6. The silent click pen according to claim 3, characterized in that, The pressing mechanism also includes a pusher head, which is linked to the rotating wheel and cooperates with the pen barrel guide so that it can only move axially; the inner ring of the bearing is fixed to the rear end of the pusher head.

7. The silent click pen according to claim 6, characterized in that, The bearings mentioned therein are deep groove ball bearings, sliding bearings, or needle roller bearings.

8. The silent click pen according to claim 7, characterized in that, The pen barrel and the pen neck are connected to each other by threads, and an anti-loosening structure is provided to prevent the threaded connection from coming loose.

9. The silent click pen according to claim 1, characterized in that, The elastic reset element is a compression spring, with its front end abutting against the inner step of the pen neck and its rear end abutting against the flange of the pen refill assembly to provide the reset force.

10. The silent click pen according to claim 3, characterized in that, The positioning bushing is circumferentially positioned by fitting into the first groove on the inner wall of the pen barrel through the positioning part, and is axially pressed by the shoulder by the abutment section of the pen neck.

11. The silent click pen according to any one of claims 1 to 10, characterized in that, The trim piece is constructed as a separate, replaceable functional module, which is detachably fixed to the outer ring of the bearing.

12. The silent click pen according to claim 11, characterized in that, Furthermore, the rotational damping formed by the trim and the bearing is configured within a predetermined threshold range to provide stable tactile feedback during user rotation and to prevent free rotation due to inertia.

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