Pen structure and refill module telescopic driving structure based on bearing pressing

Abstract

The utility model provides a pen structure based on bearing pressing, a refill module telescopic driving structure and the pen structure based on bearing pressing. The pen structure based on bearing pressing comprises a pen holder, a refill module, a refill module switching piece and a bearing pressing piece. Wherein the pen holder is provided with an inner cavity, a pen point opening and a pen tail; the refill module is contained in the inner cavity in a clearance mode and located between the pen point opening and the pen tail. The refill module switching piece is located between the refill module and the bearing pressing piece, one end of the refill module switching piece abuts against the refill module, and the other end of the refill module switching piece abuts against the bearing pressing piece so that the rotating conduction part can drive the refill module switching piece to rotate when the bearing pressing piece rotates. Therefore, a target refill in the refill module is driven to stretch out and draw back.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of teaching aids, in particular to a bearing-based push pen structure and a refill module extension and retraction driving structure. BACKGROUND

[0002] As a daily writing essential tool, the rationality of the pen structure design is directly related to the writing experience and the convenience of use. A reasonable pen structure can ensure smooth writing and easy operation, providing efficient writing support for people in various scenarios such as learning, office work, and life. With the continuous improvement of people's requirements for writing tools, the structure of the pen is also continuously improving and innovating.

[0003] At present, the common push pen on the market mainly adopts a traditional push mechanical structure. This type of structure usually sets a spring and a buckle device inside the pen barrel, and controls the extension and retraction of the refill by pressing the tail end of the pen barrel. For multi-refill pens, a switching ring or dial is usually rotated on the outside of the pen barrel to select different refills by using the internal mechanical transmission structure. For example, some multi-color ballpoint pens rely on rotating the outer shell of the pen body to drive the internal gear or track structure to switch different color refills.

[0004] However, the structure of these existing pens has many defects. The spring and buckle of the traditional push push pen are prone to wear and tear, and elastic fatigue after long-term frequent use. The weakening of spring elasticity will cause uneven force when the refill is ejected and retracted, affecting the continuity of writing; the wear of the buckle may cause the refill to be unable to be firmly locked in the extended or retracted position, resulting in accidental extension and retraction. For the switching structure of multi-refill pens, the complex gear or track transmission design not only increases the production cost and manufacturing difficulty of the pen, but also these precision components are easily damaged by external impact or dust entering during use, resulting in failure of the refill switching. In addition, the complex structure also makes the weight distribution of the pen body uneven, and the hand is prone to fatigue when holding and writing for a long time. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a bearing-based push pen structure and a refill module extension and retraction driving structure to overcome or alleviate the above technical problems in the prior art.

[0006] In order to achieve the above purpose, the present application provides the following technical solutions:

[0007] A bearing pressing based pen structure, comprising: a pen barrel, a refill module, a refill module switching piece, a bearing pressing piece; wherein: the pen barrel has an inner cavity, a pen head port, and a pen tail; the refill module is accommodated in the inner cavity in a clearance manner and is located between the pen head port and the pen tail; the refill module switching piece is located between the refill module and the bearing pressing piece, and one end of the refill module switching piece is in abutment with the refill module, and the other end of the refill module switching piece is in abutment with the bearing pressing piece to enable the rotation transmission part to drive the refill module switching piece to rotate when the bearing pressing piece rotates, and accordingly enable the target refill in the refill module to be driven to extend and retract.

[0008] Optionally, the bearing pressing piece comprises: a bearing mounting seat and a rotation transmission part, the bearing mounting seat has a first movable end and a second movable end, the rotation transmission part has a first connecting end and a second connecting end, the bearing mounting seat is connected with the first connecting end through the first movable end and protrudes from the outer sidewall of the pen barrel, the bearing mounting seat is connected with the first connecting end through the second movable end to receive an applied rotation driving force, the rotation driving force enables the rotation transmission part to rotate and drive the refill module switching piece to rotate; the rotation transmission part is rotatably accommodated in the inner cavity, and the first connecting end and the second movable end are connectable, and the second connecting end and the refill module switching piece are connectable to form an adjustable rotation state and accordingly enable the target refill in the refill module to move towards the pen head port or away from the pen head port, and accordingly enable the target refill in the refill module to be driven to extend and retract.

[0009] Optionally, one end of the refill module switching piece towards the rotation transmission part has an operation end connectable with the second connecting end, and the adjustable rotation state is formed through the operation end to enable the target refill in the refill module to move towards the pen head port or away from the pen head port.

[0010] Optionally, one end of the refill module switching piece towards the rotation transmission part is a fork type butt joint structure, the fork type butt joint structure serves as the operation end to be connectable with the second connecting end, so that the second connecting end can be rotated and accordingly the adjustable rotation state is formed and accordingly the target refill in the refill module can move towards the pen head port or away from the pen head port.

[0011] Optionally, the refill module switching piece is a columnar structure, one end of the columnar structure towards the rotation transmission part has a plug-in part, and the second connecting end is plugged into the plug-in part to form the fork type butt joint structure.

[0012] Optionally, the refill module switching piece comprises a first knot part and a second knot part, the first knot part is connected with the rotation transmission part to drive the first knot part to rotate when the bearing pressing piece rotates, and the second knot part is knotted with the first knot part to form linkage with a target refill in the refill module when the first knot part rotates, so that the target refill in the refill module can move towards or away from the pen head opening.

[0013] Optionally, the end of the refill module towards the refill module switching piece is provided with external threads, and the end of the pen barrel towards the refill module is provided with internal threads, and the external threads and the internal threads are threadedly connected to fix the refill module and the pen barrel.

[0014] Optionally, the bearing mounting seat is provided with a rotatable bearing, and the rotatable bearing can receive driving force to drive the bearing pressing piece to rotate.

[0015] Optionally, the outer wall of the pen barrel is provided with a sheath close to the pen head opening, and / or the pen barrel is provided with a top cap close to the bearing pressing piece, and a rubber is sleeved on the top cap.

[0016] Optionally, the pen head opening is arranged on the pen neck.

[0017] The application further provides a refill module extension and retraction driving structure, which comprises a refill module switching piece and a bearing pressing piece, the refill module switching piece is located between the refill module and the bearing pressing piece, one end of the refill module switching piece is in top contact with the refill module, and the other end is in top contact with the bearing pressing piece to drive the refill module switching piece to rotate when the bearing pressing piece rotates, and accordingly drive a target refill in the refill module to extend and retract.

[0018] The application has the following technical advantages:

[0019] 1. The traditional press-type pressing pen relies on spring and buckle to control the extension and retraction of the refill. After long-term and frequent use, the spring is prone to elastic fatigue, and the buckle is prone to wear. The spring elasticity decreases, the elastic force acting on the refill during extension and retraction is unstable, the force is uneven, and the writing continuity is affected. The buckle wear may cause unstable fixation of the refill, and accidental extension and retraction may occur.

[0020] The bearing pusher rotates, drives the refill module switching piece through the rotating transmission part, and then realizes the extension and retraction of the refill. Compared with the traditional spring and buckle structure, the wear degree of the bearing pusher in the rotating process is much lower than that of the spring and buckle. Due to the rolling friction characteristics of the bearing, the power can be transmitted more stably, and the force on the refill during extension and retraction is more uniform, thereby ensuring the writing continuity and effectively avoiding the abnormal extension and retraction of the refill caused by wear.

[0021] 2. The traditional multi-refill pen relies on a complex gear or track transmission structure to switch the refill. Such structure has many precise components, which are easily damaged by external force impact or dust entering during use, resulting in failure of the refill switching.

[0022] The refill module switching piece of the present scheme is in contact with the refill module at one end and in contact with the bearing pusher at the other end, and the structure is relatively simple. The rotation of the bearing pusher drives the refill module switching piece to rotate, realizing the extension and retraction of the target refill, and reducing the number of precision components such as gears, tracks, etc. which are prone to damage. This not only reduces the risk of damage caused by too many components, but also makes the structure relatively simple, so that it can still maintain good stability when subjected to external force impact or dust entering, greatly improving the reliability of the refill switching and reducing the probability of failure of the refill switching.

[0023] 3. The traditional multi-refill pen has uneven weight distribution due to the complex internal transmission structure. During long-time writing, the hand needs to constantly adjust the force to maintain the balance of the pen, which is easy to cause fatigue.

[0024] In the present scheme, the refill module is accommodated in the inner cavity of the pen barrel in a gap manner, and the refill switching and extension and retraction functions are realized through the relatively simple refill module switching piece and bearing pusher. This design makes the internal structure of the pen more reasonable, which is conducive to optimizing the weight distribution of the whole pen, making the pen more balanced when holding, reducing the force consumed by the hand to maintain balance during long-time writing, and effectively reducing the hand fatigue.

[0025] 4. The complex gear or track transmission design of the traditional multi-refill pen has higher requirements for manufacturing process and precision, increasing the difficulty and cost in the production process. Not only is the processing of components difficult, but the assembly process is also more complex, requiring higher technical level and more labor cost.

[0026] The present scheme is based on the bearing pusher pen structure, which has relatively simple and clear components. The connection and cooperation between the refill module, the refill module switching piece and the bearing pusher are relatively easy to manufacture and assemble. For example, the top contact structure of the bearing pusher and the refill module switching piece is easier to manufacture than the complex gear transmission. This greatly reduces the production cost and manufacturing difficulty of the pen, improves the production efficiency, and is conducive to large-scale production and market promotion of the product. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the specification, are included to provide further understanding of the application and are incorporated in and constitute a part of this specification. The illustrations are shown singularly in the drawings. It will be best understood by reference to the drawings, wherein:

[0028] Figure 1 FIG. 1 is a schematic diagram of a pen structure based on bearing pressing according to an embodiment of the present application.

[0029] Figure 2 FIG. 2 is a schematic diagram of a pen structure based on bearing pressing according to another embodiment of the present application. DETAILED DESCRIPTION

[0030] The application will be described in detail with reference to the drawings, wherein the examples are provided by way of explanation of the application and are not intended to limit the application. In fact, those skilled in the art will appreciate that modifications and variations to the application can be made without departing from the spirit or scope of the application. For example, features shown or described as one embodiment can be used in another embodiment to yield yet another embodiment. It is, therefore, intended that such modifications and variations be included within the scope of the application. The application is not limited to the specific embodiments described herein, but only by the claims that follow, although various embodiments of the present application will now be described in detail with reference to the accompanying drawings. It is also to be noted that, as used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and are not required to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present application. The terms "connected", "connected", "provided" used in the present application should be understood broadly, for example, it can be fixedly connected, or it can be connected; it can be directly connected, or it can be indirectly connected through intermediate components; the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0032] Figure 1 FIG. 1 is a schematic diagram of a pen structure based on bearing pressing according to an embodiment of the present application. Figure 2 FIG. 2 is a schematic diagram of a pen structure based on bearing pressing according to another embodiment of the present application. Figures 1-2As shown, the embodiment of the present application provides a bearing pressing based pen structure, which comprises: a pen barrel 1, a pen core module 2, a pen core module switching piece 3, a bearing pressing piece 4; wherein: the pen barrel 1 has an inner cavity, a pen head port 11, and a pen tail 12; the pen core module 2 is accommodated in the inner cavity in a clearance manner and is located between the pen head port 11 and the pen tail 12; the pen core module switching piece 3 is located between the pen core module 2 and the bearing pressing piece 4, and one end of the pen core module switching piece 3 is in abutment with the pen core module 2, and the other end of the pen core module switching piece 3 is in abutment with the bearing pressing piece 4, so that when the bearing pressing piece 4 rotates, the rotation transmission part 42 drives the pen core module switching piece 3 to rotate, and accordingly drives the target pen core in the pen core module 2 to extend and retract.

[0033] Optionally, the bearing pressing piece 4 comprises: a bearing mounting seat 41 and a rotation transmission part 42, the bearing mounting seat 41 has a first movable end 411 and a second movable end 412, the rotation transmission part 42 has a first connecting end 421 and a second connecting end 422, the bearing mounting seat 41 is connected with the first connecting end 421 through the first movable end 411 and protrudes from the outer side wall of the pen barrel 1, the bearing mounting seat 41 is connected with the first connecting end 421 through the second movable end 412 to receive the applied rotation driving force, the rotation driving force makes the rotation transmission part 42 rotate and drives the pen core module switching piece 3 to rotate; the rotation transmission part 42 is rotatably accommodated in the inner cavity, and the first connecting end 421 and the second movable end 412 are connectable, and the second connecting end 422 is connectable with the pen core module switching piece 3, so as to form an adjustable rotation state and accordingly make the target pen core in the pen core module 2 move towards the direction of the pen head port 11 or away from the direction of the pen head port 11, thereby driving the target pen core in the pen core module 2 to extend and retract.

[0034] Specifically, the specific implementation techniques of the above-mentioned various structural members are as follows:

[0035] Pen barrel 1

[0036] 1. The pen barrel 1 is the external support structure of the entire pen, which needs to have good holding feeling and strength. The shape and size of the inner cavity should be accurately designed to fit the installation of the pen core module 2, the pen core module switching piece 3 and the bearing pressing piece 4. For example, the inner diameter of the inner cavity should be slightly larger than the outer diameter of the pen core module 2, so that the pen core module 2 can be smoothly installed in a clearance fit manner, while not shaking too much. The design of the pen head port 11 should consider the adaptation with the pen tip of the target pen core, to ensure that the pen tip can be smoothly written when it is extended, and effectively protected when it is retracted. The pen tail 12 part needs to reserve appropriate space for reasonable connection or cooperation with related parts of the bearing pressing piece 4.

[0037] 2. In view of the intensity and durability of daily use, the pen barrel 1 can be made of engineering plastics such as polycarbonate PC or acrylonitrile-butadiene-styrene copolymer ABS, which have high strength, toughness and good processing performance, can meet different modeling needs, and the cost is relatively low. If you want a higher quality texture, you can also choose metal materials such as aluminum alloy, which not only looks good after anodizing treatment, but also enhances wear resistance.

[0038] Pen refill module 2

[0039] The pen refill module 2 usually contains multiple refills, each of which needs to have independent extension and retraction functions. The choice of pen refill can be based on actual needs, such as common neutral refill, ballpoint refill, etc. In order to realize the orderly arrangement and cooperative work of the pen refill, the pen refill module 2 can be designed with corresponding positioning structures such as grooves or clamping grooves inside to ensure that the pen refill does not interfere with each other in the module, and can accurately align the pen head port 11 during switching.

[0040] The specific implementation of the positioning structure is as follows: multiple grooves can be provided inside the pen refill module 2, which are distributed along the length direction of the pen refill module 2. The size and shape of each groove are matched with the outer diameter of the pen refill to ensure that the pen refill can be tightly embedded therein. For example, for common neutral refills, the diameter of the groove is slightly larger than the outer diameter of the pen refill by 0.1-0.3mm, so that the pen refill can be smoothly inserted, but there will be no large shaking. The groove can be connected with the main structure of the pen refill module 2 by mold integrated forming, to ensure the integrity and stability of the structure. This connection makes the groove part of the pen refill module 2, which will not loosen or deform due to long-term use. The main function of the groove is to position and constrain the pen refill, preventing the pen refill from moving radially in the module. When the pen refill is inserted into the groove, the inner wall of the groove will support and guide the pen refill, ensuring that the pen refill remains straight during axial movement, avoiding the pen refill from deviating or tilting during extension and retraction, thereby ensuring that the pen tip can accurately align the pen head port 11, ensuring the accuracy and smoothness of writing. If the pen refill module switching piece 3 adopts a cam structure, the profile of the cam will gradually press the pen refill located in the groove during rotation. When the high point of the cam contacts the pen refill, it will push the pen refill along the groove towards the pen head port 11, realizing the extension of the pen refill; when the low point of the cam contacts the pen refill, the pen refill will retract under the action of its own spring or other elastic elements, realizing the retraction function of the pen refill. At the same time, the groove ensures that the pen refill does not deviate from the straight line during axial movement, making the extension and retraction of the pen refill stable and reliable.

[0041] Alternatively, based on the card slot, such as the convex or concave part arranged inside the refill module 2, its shape can be rectangular, trapezoidal or other shapes, and its size is designed according to the characteristics of the refill. Each refill corresponds to a card slot, and the position of the card slot corresponds to the position of the refill. Similar to the groove, the card slot is usually combined with the main part of the refill module 2 through mold forming, forming a whole structure. During manufacturing, through accurate mold design and processing technology, the position and size accuracy of the card slot are ensured. The card slot is mainly used to position the refill in the circumferential position of the refill. It can cooperate with the corresponding structure on the refill, such as the convex or concave part on the refill, to ensure that the refill does not rotate in the circumferential direction in the refill module 2, and to keep the refill at a fixed angle position, so that the orientation of the refill does not change when the refill module switching piece 3 performs switching operation. In this way, when the target refill is driven to extend, the nib can always be at the appropriate writing angle, avoiding the inconvenience of writing due to the rotation of the refill. When cooperating with the card slot, the refill module switching piece 3 can have a protrusion or push rod matching the shape of the card slot. When the refill module switching piece 3 rotates, these protrusions or push rods will enter or exit the card slot, and generate a force with the corresponding structure on the refill, pushing the refill to move axially. For example, the protrusion of the refill module switching piece 3 enters the card slot and pushes the corresponding structure on the refill, making the refill extend towards the pen head port 11; while the protrusion exits the card slot, the refill retracts under the action of the elastic element. The circumferential positioning function of the card slot ensures that the refill does not rotate during this process, ensuring that the writing angle of the nib is always correct.

[0042] Through the cooperation of the above positioning structure and the refill module switching piece 3, the orderly management and accurate control of multiple refills in the refill module 2 can be realized. The groove structure ensures the axial stability and linear motion of the refill, and the card slot structure ensures the circumferential position of the refill is fixed. The refill module switching piece 3, through the ingenious mechanical transmission principle, accurately drives the corresponding refill to extend or retract according to its rotation angle and direction, thereby realizing the orderly switching and extension and retraction of different refills, and providing users with convenient and reliable writing experience.

[0043] 2. The refill module 2 is accommodated in the inner cavity of the pen barrel 1 in a clearance fit manner, which can not only ensure the relative movement of the refill module 2 in the pen barrel, but also play a guiding role to a certain extent. At the same time, one end of the refill module 2 is in abutment with the refill module switching piece 3, and the extension and retraction of the refill are driven by the rotation of the refill module switching piece 3. When designing, it is necessary to ensure that the abutment structure between the refill module 2 and the refill module switching piece 3 is tight and reliable, so as to effectively transmit the driving force.

[0044] Refill module switching piece 3

[0045] 1. The pen core module switching piece 3 is a key component connecting the pen core module 2 and the bearing pusher 4, and its shape and structure need to be carefully designed. One end of the pen core module switching piece 3 is in contact with the top of the pen core module 2, and the other end is in contact with the rotating transmission part 42 of the bearing pusher 4. When the rotating transmission part 42 rotates, the pen core module switching piece 3 can convert the rotary motion into linear motion to drive the target pen core in the pen core module 2 to extend or retract. To achieve this function, the pen core module switching piece 3 can be designed as a transmission component with a specific shape, such as a part with a spiral groove or cam structure, which can achieve precise extension and retraction control of the pen core by cooperating with the rotating transmission part 42 and the pen core module 2.

[0046] 2. Since the pen core module switching piece 3 needs to withstand certain friction and driving force during operation, a material with good wear resistance and strength should be selected. For example, wear-resistant plastic such as polyoxymethylene (POM) can be used, which has high hardness, wear resistance and self-lubricating properties, effectively reducing wear and extending service life.

[0047] Bearing pusher 4

[0048] 1. Bearing mounting seat 41

[0049] The bearing mounting seat 41 serves to connect and support the rotating transmission part 42, and cooperates with the pen barrel 1. It has a first movable end 411 and a second movable end 412. The first movable end 411 is connected to the first connecting end 421 of the rotating transmission part 42 and protrudes from the outer wall of the pen barrel 1. This design facilitates user operation and provides an easy-to-grip and rotate part. The second movable end 412 is also connected to the first connecting end 421 of the rotating transmission part 42 to receive the applied rotary driving force. To ensure the stability and reliability of the structure, the connection between the bearing mounting seat 41 and the rotating transmission part 42 should be designed with precise positioning and fastening structure, such as buckle, threaded connection, etc., to ensure that the two parts do not move relative to each other during rotation.

[0050] To ensure the strength and stability of the bearing mounting seat 41, metal materials such as stainless steel or aluminum alloy can be selected. These materials can withstand certain external forces and are not easily deformed, ensuring that the rotary driving force can be reliably transmitted during long-term use.

[0051] 2. Rotating transmission part 42

[0052] The rotation transmission part 42 is a key transmission part for realizing the extension and retraction of the refill, and is rotatably accommodated in the inner cavity of the pen barrel 1. The first connecting end 421 of the rotation transmission part 42 is connected with the second movable end 412 of the bearing mounting seat 41, and the second connecting end 422 is connected with the refill module switching part 3. In order to realize smooth rotation and accurate transmission, the rotation transmission part 42 can adopt a structure similar to a shaft, and a transmission structure such as a gear, a protrusion, etc. is processed on the surface of the rotation transmission part 42 to cooperate with the refill module switching part 3. At the same time, in order to reduce the friction during rotation, a bearing or lubricating structure can be arranged at the contact part between the rotation transmission part 42 and the inner cavity of the pen barrel 1.

[0053] The rotation transmission part 42 needs to have good wear resistance and rigidity, and can be made of high-quality alloy steel material and subjected to appropriate heat treatment to improve its hardness and wear resistance. The surface can be subjected to chrome plating or nitriding treatment to further enhance its wear resistance and corrosion resistance.

[0054] Optionally, one end of the refill module switching part 3 towards the rotation transmission part 42 has an operation end connectable with the second connecting end 422, and the adjustable rotation state is formed through the operation end to move the target refill in the refill module 2 towards or away from the pen tip opening 11.

[0055] Optionally, one end of the refill module switching part 3 towards the rotation transmission part 42 is a fork type butt joint structure, which serves as the operation end to be connectable with the second connecting end 422, so that the second connecting end 422 can be rotated and accordingly the adjustable rotation state is formed and the target refill in the refill module 2 can be moved towards or away from the pen tip opening 11.

[0056] Optionally, the refill module switching part 3 is a columnar structure, one end of the columnar structure towards the rotation transmission part 42 has a plug-in part, and the second connecting end is plugged into the plug-in part to form the fork type butt joint structure.

[0057] Optionally, the refill module switching part 3 includes a first knot part 31 and a second knot part 32, the first knot part 31 is connected with the rotation transmission part 42 to drive the first knot part 31 to rotate when the bearing pressing part 4 rotates, and the second knot part 32 is knotted with the first knot part 31 to form linkage cooperation with the target refill in the refill module 2 based on the rotation of the first knot part 31, so that the target refill in the refill module 2 can be moved towards or away from the pen tip opening 11.

[0058] Optionally, the end of the refill module 2 towards the refill module switching piece 3 has an external thread, and the end of the pen barrel towards the refill module 2 has an internal thread, and the external thread and the internal thread form a threaded connection, so that the refill module 2 is connected and fixed with the pen barrel 1.

[0059] Specifically, the specific implementation techniques of the above-mentioned various structural members are as follows:

[0060] The following is a detailed description of the above technical content from a technical point of view:

[0061] Refill module switching piece 3

[0062] 1. The operating end of the refill module switching piece 3 towards one end of the rotation transmission part 42 is a key part for realizing the connection and power transmission with the rotation transmission part 42. The operating end can be designed as a structure with certain geometric shape and dimensional accuracy, and its main function is to connect with the second connecting end 422 of the rotation transmission part 42, so as to ensure the close fit and stable power transmission between them.

[0063] The end of the refill module switching piece 3 towards the rotation transmission part 42 is designed as a fork-shaped docking structure, which can be similar to a bifurcated shape, and it can be connected as an operating end with the second connecting end 422. For example, the fork-shaped structure can be composed of two or more branches, and the size and shape of each branch should match the corresponding part of the second connecting end 422, so as to ensure accurate docking when assembled.

[0064] When connected, the second connecting end 422 can be inserted between the branches of the fork-shaped docking structure, forming a connection mode similar to fork-and-groove matching. In order to ensure the reliability of the connection, some protrusions or depressions can be provided on the inner side of the branches, which cooperate with the corresponding structures on the second connecting end 422, so as to avoid the phenomenon of slipping or disengaging during rotation. This connection mode enables the rotation of the rotation transmission part 42 to be accurately transmitted to the refill module switching piece 3, realizing the adjustment of the rotation state.

[0065] When the rotation transmission part 42 rotates, the rotation movement can be transmitted to the refill module switching piece 3 through the fork-shaped docking structure, and then drive the target refill in the refill module 2 to perform extension and retraction movement. When the rotation transmission part 42 rotates clockwise or counterclockwise, the fork-shaped docking structure will rotate according to its mechanical structure design, and push or pull the target refill in the refill module 2, so that it moves towards or away from the pen head port 11.

[0066] 2. Columnar structure and plug-in part:

[0067] The refill module switching piece 3 is a columnar structure, which has good structural stability and is easy to process. The columnar shape can be designed according to the shape and size of the inner cavity of the pen barrel 1 to ensure smooth installation and movement of the refill module switching piece 3 in the pen barrel 1.

[0068] The plug-in part of the columnar structure towards one end of the rotation transmission part 42 can be designed as a protruding part with a certain shape, for example, it can be a cylindrical or prismatic plug. The size of the plug-in part should be matched with the matching part of the second connecting end 422 to ensure that it can be tightly plugged with the second connecting end 422.

[0069] When the plug-in part is inserted into the second connecting end 422, the connection can be achieved by interference fit or transition fit. For interference fit, the outer diameter of the plug-in part is slightly larger than the inner diameter of the second connecting end 422, and the two are tightly combined by a certain assembly pressure; for transition fit, a slight taper can be designed on the contact surface of the plug-in part and the second connecting end 422 to facilitate assembly and ensure a certain connection tightness.

[0070] The plug-in part and the second connecting end 422 form a forked butt joint structure, which ensures reliable connection and power transmission between the rotation transmission part 42 and the refill module switching piece 3. Through this connection, the rotation of the rotation transmission part 42 can drive the entire refill module switching piece 3 to rotate accordingly, thereby realizing the extension and retraction drive of the refill in the refill module 2.

[0071] 3. The first knot part 31 and the second knot part 32:

[0072] The first knot part 31 is the part directly connected with the rotation transmission part 42, and its structure can be designed according to the specific shape and driving mode of the rotation transmission part 42. For example, if the rotation transmission part 42 adopts a shaft structure, the first knot part 31 can be a sleeve structure with a keyway or spline, which matches the key or spline on the rotation transmission part 42 to ensure synchronous rotation of the two when rotating.

[0073] The connection between the first knot part 31 and the rotation transmission part 42 can be a key connection or a spline connection, which can transmit a large torque to ensure that the first knot part 31 can stably rotate with the rotation transmission part 42 when the rotation transmission part 42 rotates.

[0074] When the bearing pressing piece 4 rotates, the rotation transmission part 42 transmits power to the first knot part 31, causing it to rotate, thereby realizing the transmission of rotary motion.

[0075] Second knot part 32: the second knot part 32 is knotted with the first knot part 31, which can be designed as a ring structure outside or inside the first knot part 31. In order to ensure the relative movement and linkage between the two, a certain gap or matching structure can be set between the two, such as setting a protrusion on the inner surface of the second knot part 32 and setting a corresponding groove on the outer surface of the first knot part 31 to realize the knotting and linkage of the two.

[0076] The second knot part 32 is knotted on the first knot part 31, and the protrusion and groove cooperation or other mechanical cooperation mode makes the two relative movement and linkage. When the first knot part 31 rotates, the cooperation of the protrusion and groove will push the second knot part 32 to move correspondingly.

[0077] When the first knot part 31 rotates, based on the linkage with the second knot part 32, the rotary motion is converted into the linear motion of pushing or pulling the target refill in the refill module 2, so that the refill moves towards or away from the pen head port 11. Through reasonable design of the protrusion and groove, the extension stroke of the refill can be accurately controlled to ensure the accuracy and reliability of the extension of the refill.

[0078] Thread connection between refill module 2 and pen barrel 1: the end of the refill module 2 towards the pen barrel 1 is provided with external threads, and the size and pitch of the external threads should be designed according to the internal threads of the pen barrel 1. The tooth shape of the external threads can be common triangle, trapezoid, etc. to ensure the strength and stability of the connection.

[0079] The end of the pen barrel 1 towards the refill module 2 has internal threads, and the size and pitch of the internal threads match those of the external threads of the refill module 2. The depth should ensure sufficient connection strength, while considering the convenience of processing technology and cost factors.

[0080] When the refill module 2 is installed into the pen barrel 1, the external threads of the refill module 2 are screwed into the internal threads of the pen barrel 1 to realize the thread connection of the two. This connection method not only can firmly fix the refill module 2 in the pen barrel 1, but also is convenient for disassembly and installation when the refill module 2 needs to be replaced or repaired.

[0081] The thread connection can ensure that the position of the refill module 2 in the pen barrel 1 is relatively fixed, avoiding the axial or radial displacement of the refill module 2 during use. At the same time, through the thread connection, the position of the refill module 2 in the pen barrel 1 can be adjusted according to the actual demand, so as to optimize the relative position relationship between the refill module 2, the refill module switching piece 3 and the pen head port 11, and ensure the smoothness and accuracy of the refill during extension and retraction.

[0082] In the actual product manufacturing process, the structure size, connection precision and material selection of the above components need to be accurately controlled to ensure the reliability, durability and convenience of the entire pen structure. For each connection site and moving part, the friction, wear and assembly difficulty are considered, and through reasonable tolerance design, material selection and lubrication measures, the pen can work stably for a long time to meet the user's use demand.

[0083] Optionally, a rotatable bearing is installed on the bearing mounting seat 41, which can receive driving force to drive the bearing pusher 4 to rotate.

[0084] Optionally, a sheath 5 is arranged on the outer wall of the pen barrel 1, which is close to the pen head opening 11, and / or a top cap 6 is arranged on the pen barrel 1, which is close to the bearing pusher 4, and a rubber 7 is sleeved on the top cap 6.

[0085] Optionally, the pen head opening 11 is arranged on the pen neck 8.

[0086] Specifically, the specific implementation of the above scheme is as follows:

[0087] The following is a detailed description of the above technical content from the perspective of actual products:

[0088] Rotatable bearing on bearing mounting seat 41

[0089] 1. First, the rotatable bearing should be selected according to the size of the bearing mounting seat 41 and the required bearing capacity. For example, for general pen structure, small deep groove ball bearing can be selected, which has the characteristics of simple structure, small friction coefficient and moderate bearing capacity, which is suitable for the application scene of light load such as pen.

[0090] The bearing mounting seat 41 needs to provide accurate installation position for the rotatable bearing, which can be designed to have two concentric annular grooves or steps for accommodating the inner and outer rings of the bearing. The size tolerance of the inner and outer rings should be strictly controlled to ensure the interference fit or transition fit with the bearing, and to ensure the firmness and concentricity of the bearing installation.

[0091] During installation, the outer ring of the rotatable bearing can be pressed into the corresponding annular groove of the bearing mounting seat 41, and special pressing tool can be used to avoid damage to the bearing. Then, the inner ring of the bearing is installed in cooperation with the related parts such as the rotation transmission part 42, to ensure the concentricity of the rotation transmission part 42 and the bearing inner ring, so that they can rotate together.

[0092] The main function of the rotatable bearing is to reduce friction, allowing the bearing pusher 4 to rotate smoothly when receiving driving force. When the user applies a rotating force, the bearing converts the original sliding friction into rolling friction, reducing energy loss and improving the flexibility and smoothness of rotation. At the same time, the rotatable bearing can withstand certain radial and axial loads, ensuring the stability of the bearing pusher 4 during rotation, avoiding excessive friction and causing component wear and jamming, and prolonging the service life of the entire pen structure.

[0093] The sheath 5 and top cap 6 on the pen barrel 1: The sheath 5 is usually made of soft and elastic materials such as rubber or silicone to provide a comfortable grip and anti-slip performance. Its shape can be designed according to the shape of the pen barrel 1, generally tubular, and the length can be determined according to the design requirements. The part near the pen head opening 11 should be closely fitted with the pen barrel 1 to ensure that it will not easily slide or fall off during use.

[0094] The outer diameter of the sheath 5 can be slightly larger than the outer diameter of the pen barrel 1 to increase the friction of the grip. Some textures or protrusions can be designed on the surface of the sheath 5 to further enhance the anti-slip effect. For example, it can be designed as longitudinal or transverse stripes, or some irregular anti-slip protrusions.

[0095] The sheath 5 can be installed on the pen barrel 1 by interference fit or adhesive method. For interference fit, the inner diameter of the sheath 5 is slightly smaller than the outer diameter of the pen barrel 1, which is deformed by elasticity and fits on the pen barrel 1; the adhesive method can use strong glue to apply an appropriate amount of glue on the contact surface of the sheath 5 and the pen barrel 1, so that they are firmly adhered together.

[0096] The sheath 5 is mainly used to improve the grip of the pen, prevent hand slipping, and improve the comfort and stability during writing. Its soft texture can reduce the pressure on the hands during long-time writing, avoiding hand fatigue caused by long-time holding. At the same time, it can also play a role in protecting the pen barrel 1, preventing the pen barrel 1 from being scratched or damaged.

[0097] 2. Top cap 6 and eraser 7:

[0098] The top cap 6 is usually a cap-shaped structure, and its internal dimensions should match the outer diameter of the pen barrel 1. It can be designed with a certain elasticity to facilitate installation and removal. The top cap 6 is close to the bearing pusher 4, and the part in contact with the bearing pusher 4 can be designed accordingly, such as concave or convex, to better cooperate with the bearing pusher 4.

[0099] The eraser 7 can be designed according to the shape of the top cap 6, generally as a cylinder or other shape, and its size should be adapted to the outer diameter of the top cap 6. The eraser 7 should have a certain elasticity and hardness to erase the writing, while ensuring that its surface is smooth and smooth to ensure good erasing effect.

[0100] The top cap 6 can be installed on the pen barrel 1 by means of a sleeve or an interference fit. For the sleeve method, the inside of the top cap 6 can be designed with some spring or buckle structure, which is matched with the card slot or protrusion on the pen barrel 1 during installation, so that it is firmly fixed on the pen barrel 1; for the interference fit, the inner diameter of the top cap 6 is slightly smaller than the outer diameter of the pen barrel 1, which is deformed elastically and sleeved on the pen barrel 1.

[0101] The eraser 7 can be installed on the top cap 6 by insertion or adhesion. The insertion method can set an insertion hole on the top cap 6 which matches the size of the eraser 7, and the eraser 7 is inserted into it; the adhesion method applies glue to the contact surface of the top cap 6 and the eraser 7 to ensure that the eraser 7 is firmly fixed on the top cap 6.

[0102] The top cap 6 mainly plays a protective and decorative role, on the one hand, it can protect the bearing pusher 4 from external collision or dust pollution, on the other hand, it can add beauty to the appearance of the pen. The eraser 7 provides users with the function of erasing characters, facilitating the modification operation in the writing process.

[0103] The pen tip opening 11 is opened on the pen neck 8:

[0104] The pen neck 8 serves as a part connecting the pen tip opening 11 and the pen barrel 1, and its size and shape should be carefully designed. The outer diameter of the pen neck 8 can be slightly smaller than the pen barrel 1, so that the whole pen forms a certain transition in appearance, having better aesthetic appearance. The position of the pen tip opening 11 on the pen neck 8 should ensure that the pen tip can be smoothly extended and retracted, and its size is designed according to the size of the pen tip, usually slightly larger than the outer diameter of the pen tip, so that the pen tip can freely extend and retract, while the pen tip does not shake too much in the pen.

[0105] In order to ensure the stability during writing, the length of the pen neck 8 can be designed appropriately to provide a certain support length to prevent the pen tip from being bent or damaged due to excessive force during writing.

[0106] The pen neck 8 can be integrally formed with the pen barrel 1, realized by injection molding or mechanical processing process, to ensure the connection strength and stability between the two. If a split design is adopted, the pen neck 8 can be connected with the pen barrel 1 by means of threaded connection, sleeve connection or adhesion. For threaded connection, corresponding internal and external threads are designed on the pen neck 8 and the pen barrel 1 respectively to ensure their tight connection; for sleeve connection, an elastic clasp can be provided on the pen neck 8 to cooperate with the card slot on the pen barrel 1; for adhesion, high-strength glue can be used to ensure that the pen neck 8 is firmly adhered to the pen barrel 1.

[0107] The pen neck 8 sets the pen head opening 11 at the front end of the pen reasonably, provides a suitable position and support for the extension and retraction of the pen point, and meanwhile, the connection mode and structural design of the pen neck 8 and the pen barrel 1 ensure the stability of the overall structure of the pen. During the writing process, the pen neck 8 can bear the external force received by the pen point, avoids the damage of the pen barrel 1 due to the force, and improves the service life of the pen.

[0108] The embodiment of the present application also provides a refill module extension and retraction driving structure, which comprises a refill module switching piece 3 and a bearing pressing piece 4; the refill module switching piece 3 is located between the refill module 2 and the bearing pressing piece 4, one end of the refill module switching piece 3 is in top contact with the refill module 2, and the other end of the refill module switching piece 3 is in top contact with the bearing pressing piece 4, so that the rotation transmission part 42 drives the refill module switching piece 3 to rotate when the bearing pressing piece 4 rotates, and accordingly, the target refill in the refill module 2 is driven to extend and retract.

[0109] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pen structure based on bearing-driven pressing, characterized in that, include: Pen barrel (1), pen refill module (2), pen refill module switching component (3), bearing pusher (4); wherein: the pen barrel (1) has an inner cavity, a pen tip opening (11), and a pen tail (12); the pen refill module (2) is accommodated in the inner cavity in a gap manner and is located between the pen tip opening (11) and the pen tail (12); the pen refill module switching component (3) is located between the pen refill module (2) and the bearing pusher (4), and one end is abutted to the pen refill module (2), and the other end is abutted to the bearing pusher (4) so ​​that when the bearing pusher (4) rotates, the rotation transmission part (42) drives the pen refill module switching component (3) to rotate, thereby driving the target pen refill in the pen refill module (2) to extend and retract.

2. The pen structure based on bearing pressing according to claim 1, characterized in that, The bearing actuator (4) includes a bearing mounting base (41) and a rotation transmission part (42). The bearing mounting base (41) has a first movable end (411) and a second movable end (412). The rotation transmission part (42) has a first connecting end (421) and a second connecting end (422). The bearing mounting base (41) is connected to the first connecting end (421) through the first movable end (411) and protrudes from the outer wall of the pen barrel (1). The bearing mounting base (41) is connected to the first connecting end (421) through the second movable end (412) to receive the applied rotational driving force. The rotational driving force causes the rotational transmission part (42) to rotate and drives the pen refill module switching part (3) to rotate; the rotational transmission part (42) is rotatably housed in the inner cavity, and the first connecting end (421) is connected to the second movable end (412), and the second connecting end (422) is connected to the pen refill module switching part (3) to form an adjustable rotational state and thereby allow the target pen refill in the pen refill module (2) to move toward the pen tip opening (11) or away from the pen tip opening (11), thereby driving the target pen refill in the pen refill module (2) to extend and retract.

3. The pen structure based on bearing pressing according to claim 2, characterized in that, The pen refill module switching component (3) has an operating end that can be connected to the second connecting end (422) at one end facing the rotation transmission part (42). The operating end forms the adjustable rotation state so that the target pen refill in the pen refill module (2) moves toward the pen tip opening (11) or away from the pen tip opening (11).

4. The pen structure based on bearing pressing according to claim 3, characterized in that, The end of the pen refill module switching component (3) facing the rotation transmission part (42) is a fork-shaped docking structure. The fork-shaped docking structure serves as the operating end and can be connected to the second connecting end (422) so that the second connecting end (422) can be rotated and thereby form an adjustable rotation state, thereby allowing the target pen refill in the pen refill module (2) to move toward the pen tip opening (11) or away from the pen tip opening (11).

5. A pen structure based on bearing pressing according to claim 4, characterized in that, The pen refill module switching component (3) is a columnar structure. One end of the columnar structure facing the rotation transmission part (42) has a plug-in part. The second connecting end is plugged into the plug-in part to form the fork-shaped docking structure.

6. A pen structure based on bearing pressing according to claim 3, characterized in that, The pen refill module switching component (3) includes a first coupling part (31) and a second coupling part (32). The first coupling part (31) is connected to the rotation transmission part (42) so that when the bearing pusher (4) rotates, the rotation transmission part (42) drives the first coupling part (31) to rotate. The second coupling part (32) is coupled to the first coupling part (31) so that when the first coupling part (31) rotates, the first coupling part (31) and the target pen refill in the pen refill module (2) form a linkage cooperation so that the target pen refill in the pen refill module (2) can move toward the pen tip opening (11) or away from the pen tip opening (11).

7. A pen structure based on bearing pressing according to claim 6, characterized in that, The end of the pen refill module (2) facing the pen refill module switching component (3) has an external thread, and the end of the pen barrel facing the pen refill module (2) has an internal thread. The external thread and the internal thread form a threaded connection so that the pen refill module (2) and the pen barrel (1) are connected and fixed.

8. A pen structure based on bearing pressing according to claim 7, characterized in that, A rotatable bearing is mounted on the bearing mounting base (41), and the rotatable bearing can receive driving force to drive the bearing actuator (4) to rotate.

9. A pen structure based on bearing pressing according to claim 8, characterized in that, The outer wall of the pen barrel (1) is provided with a protective sleeve (5), the protective sleeve (5) is close to the pen tip opening (11), and / or, the pen barrel (1) is provided with a top cap (6), the top cap (6) is close to the bearing pusher (4), and the top cap (6) is covered with an eraser (7).

10. A telescopic drive structure for a pen refill module, characterized in that, include: Pen refill module switching component (3) and bearing pusher component (4); the pen refill module switching component (3) is located between the pen refill module (2) and the bearing pusher component (4), with one end abutting against the pen refill module (2) and the other end abutting against the bearing pusher component (4) so ​​that when the bearing pusher component (4) rotates, the rotation transmission part (42) drives the pen refill module switching component (3) to rotate, thereby driving the target pen refill in the pen refill module (2) to extend and retract.

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