Ultra-transparent extremely-compact spring ballpoint pen

Abstract

The utility model provides an ultra-transparent and extremely-compact spring ballpoint pen. The spring ballpoint pen comprises a shell assembly and a telescopic mechanism. The telescoping mechanism is located at the upper portion of the housing assembly, and the lower end of the telescoping mechanism is provided with a compressible spring integrally formed with a part of the telescoping mechanism. The shell assembly comprises an upper shell and a lower shell which are connected to each other, the telescopic mechanism is arranged in the upper shell, the upper shell comprises a pressing part and a compressible part which are connected with each other, and the compressible part is formed into a spiral spring. According to the spring ballpoint pen, the compressible spring and the telescopic mechanism are constructed into a whole, so that the number of components is reduced, the internal structure is more compact, and extreme compactness of the spring ballpoint pen is facilitated. Besides, according to the spring ballpoint pen, one part of the upper shell is formed into the pressing part, the other part of the upper shell is formed into the spiral spring, the pressing comfort of the finger part can be improved, the pressing operation is easier, and the attractiveness of the appearance can be improved.

Description

Technical Field

[0001] This application relates to the field of writing instruments technology. More specifically, this application relates to an ultra-transparent, ultra-compact spring-loaded ballpoint pen. Background Technology

[0002] Writing pens, such as ballpoint pens, are essential tools for both working and studying groups. Among them, push-button writing pens are widely popular due to their ease of use and the fact that they do not require the cap to be stored.

[0003] The compressible spring in a push-button writing pen is an essential component for extending and retracting the pen tip. In related technologies, the compressible spring is usually placed as a separate component at the bottom of the housing. However, this results in a large number of components in the writing pen and a more dispersed distribution of these components, requiring a larger housing space to accommodate them. This is not conducive to achieving an extremely compact writing pen, and too many components are also inconvenient for users to store. Utility Model Content

[0004] In view of the above-mentioned technical problems, one object of this application is to provide an improved spring ballpoint pen that has fewer parts and a compact structure.

[0005] Another objective of this application is to propose an improved spring-loaded ballpoint pen that is more aesthetically pleasing and offers better pressing comfort.

[0006] According to one aspect of this application, an ultra-transparent, ultra-compact spring ballpoint pen is provided. The spring ballpoint pen includes a housing assembly and a telescopic mechanism, wherein the housing assembly accommodates the telescopic mechanism and the pen tip; wherein the telescopic mechanism is located at the upper part of the housing assembly, and has a compressible spring integrally formed with a portion of the telescopic mechanism at its lower end; wherein the telescopic mechanism is configured to move downward under a thrust to apply a thrust to the compressible spring and the pen tip, causing the compressible spring to be compressed, and the telescopic mechanism locks the pen tip in an extended position and a retracted position under the rebound force of the compressible spring; and wherein the housing assembly includes an upper housing and a lower housing connected to each other, the telescopic mechanism being disposed inside the upper housing, the upper housing including a push-button portion and a compressible portion connected to each other, the compressible portion being formed as a helical spring.

[0007] In some embodiments, the compressible spring is made of plastic material and has a helical portion with a flat rectangular cross-section.

[0008] In some embodiments, the telescopic mechanism includes a locking member, a push rod, and a cam rotator disposed at the lower end of the push rod. The cam rotator has a compressible spring integrally formed at its lower end. The push rod is configured to move within the locking member along its length and to apply a thrust to the cam rotator. The cam rotator is configured to lock the pen tip in an extended position when in a first engaged state with the locking member, and to lock the pen tip in a retracted position when in a second engaged state with the locking member.

[0009] In some embodiments, the locking member includes a plurality of first guide grooves and a plurality of second guide grooves, the first guide grooves and second guide grooves being alternately arranged along the circumference of the locking member, and the length of the first guide groove being greater than the length of the second guide groove; the push rod has an engaging tooth on its lower end face; the cam rotator has a locking portion on its upper edge, the locking portion being configured to contact the engaging tooth; wherein, when the locking portion engages with the first guide groove, the cam rotator is in a first engagement state with the locking member; when the locking portion engages with the second guide groove, the cam rotator is in a second engagement state with the locking member.

[0010] In some embodiments, the engaging teeth of the push rod include a first toothed surface and a second toothed surface arranged alternately in the circumferential direction, the first toothed surface and the second toothed surface being angled relative to each other along an edge.

[0011] In some embodiments, the push rod has a plurality of circumferential protrusions surrounding the outer wall, and the locking member has a plurality of locking member grooves, each circumferential protrusion engaging in a corresponding locking member groove and being movable along the locking member groove.

[0012] In some embodiments, the push rod includes a pressure-bearing portion and a hollow columnar force-transmitting portion, with engaging teeth and circumferential protrusions disposed on the columnar force-transmitting portion.

[0013] In some embodiments, the push rod further includes a flange that extends upward from the pressure-bearing portion for connection to the housing assembly.

[0014] In some embodiments, the cam rotator includes a columnar body portion and a columnar guide portion extending upward along the length of the body portion, the cross-sectional area of ​​the guide portion being smaller than the cross-sectional area of ​​the body portion, the guide portion engaging with the columnar force transmission portion, and a compressible spring disposed at the lower end of the body portion and extending downward along the length; the engaging portion is configured as a plurality of elongated protrusions spaced apart from each other distributed circumferentially along the body portion, the elongated protrusions protruding radially and extending along the length of the body portion.

[0015] In some embodiments, each elongated protrusion is configured as a quadrangular prism and has a joining bevel at its end, the radial protrusion height of the elongated protrusion being greater than the thickness of the first tooth bevel and the second tooth bevel.

[0016] In some embodiments, the locking member is configured as a hollow cylinder and includes a plurality of circumferentially distributed fingers, each finger having a guide bevel at its end, and adjacent fingers are alternately spaced apart by a first guide groove and a second guide groove.

[0017] In some embodiments, the housing assembly includes a support member located inside the lower housing, one end of the support member abutting against the inner wall of the lower housing and the other end abutting against the lower end of a compressible spring.

[0018] In some embodiments, the pusher is connected to the push rod on the inner side of its lower end, and the compressible part is configured to undergo elastic deformation under the action of thrust to apply thrust to the push rod.

[0019] In some embodiments, the lower housing includes a body portion and a pen tip limiting portion. The body portion is a hollow cylindrical shape, and the pen tip limiting portion is configured such that its cross-section gradually narrows from top to bottom.

[0020] In some embodiments, the housing assembly further includes an intermediate sleeve located inside the upper housing and having a first threaded connection at its lower end, the lower housing having a second threaded connection at its upper end corresponding to the first threaded connection, and the upper portion of the intermediate sleeve serving as a locking element.

[0021] According to an embodiment of this application, a spring-loaded ballpoint pen includes a housing assembly, a telescopic mechanism, and a refill. The telescopic mechanism has a compressible spring integrated into its lower end, thereby reducing the number of parts in the pen and making its internal structure more compact, contributing to its miniaturization. Furthermore, by having a pressing part with a large force-bearing area in the upper part of the housing, the comfort of pressing with the finger is improved. Further, by forming another part of the upper housing as a helical spring that cooperates with the pressing part, the user's pressing operation becomes easier, requiring less effort in transmission, and improving the aesthetic appearance. The components of the telescopic mechanism and the compressible spring transmit thrust to each other, and the specific structure makes transmission more effortless. Attached Figure Description

[0022] The features and advantages of embodiments of this application will become more readily understood from the following description with reference to the accompanying drawings. Unless otherwise stated, identical elements, features, and components having the same function and effect are each provided with the same reference numerals. In the drawings:

[0023] Figure 1 This is a perspective view of a spring-loaded ballpoint pen according to an embodiment of this application;

[0024] Figure 2 yes Figure 1 The image shows a front view and a sectional view along line AA of a spring-loaded ballpoint pen with the tip in the retracted position.

[0025] Figure 3 yes Figure 1 The image shows a front view and a sectional view along line AA of a spring-loaded ballpoint pen with the tip in the extended position.

[0026] Figure 4 This is a perspective view of a pen refill according to an embodiment of this application;

[0027] Figure 5 This is a perspective view of the push rod of the telescopic mechanism according to an embodiment of this application;

[0028] Figure 6 This is a perspective view of a telescopic mechanism integrating a compressible spring and a cam rotation component according to an embodiment of this application;

[0029] Figure 7 yes Figure 6 A partial schematic diagram of the cam rotating component;

[0030] Figure 8 This is a perspective view of one embodiment of the locking member of the telescopic mechanism according to an embodiment of this application;

[0031] Figure 9 This is a cross-sectional schematic diagram of another embodiment of the locking member of the telescopic mechanism according to an embodiment of this application;

[0032] Figure 10 This is a perspective view of the upper housing of the housing assembly according to an embodiment of this application;

[0033] Figure 11 This is a perspective view of the lower housing of the housing assembly according to an embodiment of this application;

[0034] Figure 12 This is a perspective view of the intermediate sleeve of the housing assembly according to an embodiment of this application;

[0035] Figure 13 This is a perspective view of the support member of the housing assembly according to an embodiment of this application. Detailed Implementation

[0036] The spring-loaded ballpoint pen according to embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that this application is not limited to the following embodiments.

[0037] The accompanying drawings are intended to convey a further understanding of the embodiments of this application. The drawings illustrate embodiments and are used in conjunction with the specification to explain the principles and concepts of this application. Elements in the drawings are not necessarily drawn to scale relative to each other. In this document, directional terms such as "upper end," "upper part," "upper section," "lower end," "lower section," and "lower part" are determined based on the posture of the spring-loaded ballpoint pen in actual use; for example, the part held by the user's hand is called the lower part of the spring-loaded ballpoint pen. These directional terms are used merely to more clearly describe the relative positional relationships between structures, not to describe absolute directions. Unless otherwise expressly defined, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or a numerical limitation; the term "multiple" refers to two or more.

[0038] Figure 1 A perspective view of a spring-loaded ballpoint pen according to an embodiment of this application is shown, illustrating the general external structure of the spring-loaded ballpoint pen. Figure 2 and Figure 3 They are shown respectively Figure 1 The tip of the spring-loaded ballpoint pen shown is in both the retracted and extended positions. It should be noted that although the spring-loaded ballpoint pen according to the embodiments of this application is shown as a ballpoint pen in the accompanying drawings, it is not limited to a ballpoint pen; it can also be any type of pen in the art, such as a stylus pen, electronic pen, pressure pen, drop-resistant pen, automatic pen, thermochromic pen, etc.

[0039] Reference Figure 2 and Figure 3 In this embodiment, the spring-loaded ballpoint pen 10 includes a housing assembly 1, a telescopic mechanism 2, and an optional refill 3. For example, the finished spring-loaded ballpoint pen 10 in this embodiment may include the refill 3 itself, or the finished spring-loaded ballpoint pen may not include the refill 3, but the refill 3 may be assembled into the spring-loaded ballpoint pen as a single piece by the user during use. The housing assembly 1 provides a receiving space for the telescopic mechanism 2 and the refill 3, thereby providing support and protection for them. The telescopic mechanism 2 and the refill 3 are housed inside the housing assembly 1. The telescopic mechanism 2 has a compressible spring 4 at its lower end, and the compressible spring 4 is integrally formed with the telescopic mechanism 2. The compressible spring 4 can be compressed by the thrust applied by the telescopic mechanism 2, thereby generating an upward rebound force due to elastic deformation of the compressible spring 4. By means of the rebound force of the compressible spring 4, the telescopic mechanism 2 can lock the tip 31 of the refill 3 in the extended position and the retracted position. Exemplarily, the compressible spring 4 and the telescopic mechanism 2 can be made of plastic material, and the plastic compressible spring 4 may include a helical portion 41 (see Figure 6 Furthermore, it can be constructed such that its width is greater than its thickness, resulting in a cross-section resembling... Figure 2 and Figure 3The flat, rectangular shape shown indicates that this compressible spring design helps to provide appropriate elastic force and increase fatigue strength, thereby increasing service life and making it easier for the user to press, thus requiring less effort in transmission.

[0040] In this article, the "retracted position" of the pen tip refers to the pen tip being fully retracted into the housing assembly, and the "extended position" of the pen tip refers to the pen tip extending out of the housing assembly for writing. "Push force" refers to the force applied by the user along the length of the spring-loaded ballpoint pen to actuate the pen (causing the pen tip to extend and retract), and can also be expressed as "pressing force," "pressing power," "acting force," etc., which have the same meaning.

[0041] Figure 4 A perspective view of a pen refill according to an embodiment of this application is shown. (Refer to...) Figure 4 The pen refill 3 may include two parts: a pen tube 32 and a pen tip 33. The pen tube 32 is the main body of the pen refill 3. For example, the pen tube 32 may be a hollow cylinder containing ink or pen oil for writing. The pen tip 33 is located at the lower end of the pen refill 3. The pen tip 33 may include a pen nib 31 and a fixing part 34 for connecting to the pen tube 32. The pen nib 31 is used to contact a writing medium such as paper for writing. The fixing part 34 is used to fix the pen tip 33 to the pen tube 32 as a whole and may engage with a part of the housing assembly inside the housing assembly to limit the pen nib 31 and prevent the pen nib 31 from moving further.

[0042] like Figure 2 and Figure 3 As shown, the telescopic mechanism 2 may include a locking member 21, a push rod 22, and a cam rotating member 23 disposed at the lower end of the push rod 22. In the above embodiment, the compressible spring 4 may be located at the lower end of the cam rotating member 23 and constructed as an integral part with the cam rotating member 23 (see...). Figure 6 The locking member 21 guides the push rod 22 to move within it and engages with the cam rotator 23 to lock the position of the pen tip 31. The push rod 22 is configured to move within the locking member 21 along its length and apply a thrust to the cam rotator 23. The cam rotator 23 is configured to lock the pen tip 31 in the extended position when in a first engaged state with the locking member 21, and to lock the pen tip 31 in the retracted position when in a second engaged state with the locking member 21.

[0043] The following will combine Figures 5 to 9 This describes an exemplary structure of the various components of the telescopic mechanism of a spring-loaded ballpoint pen.

[0044] Figure 5 This is a perspective view of the push rod 22 of the telescopic mechanism according to an embodiment of this application. Figure 5As shown, in one embodiment, the push rod 22 may include a pressure-bearing portion 223 and a force-transmitting portion 224 from top to bottom. The pressure-bearing portion 223 can directly or indirectly bear the pushing force applied by the user. For example, as Figure 2 As shown, a portion of the pressure-bearing part 223 extends into the inner cavity of the housing assembly 1 to receive pressure, allowing the user to apply force through the housing assembly to the pressure-bearing part 223. The force-transmitting part 224 may engage with the cam rotation member 23 at its lower end to transmit the force to the cam rotation member 23, which in turn transmits the force to the compressible spring 4 at the lower end of the cam rotation member 23, for extending and retracting the pen tip 31. For example, as... Figure 5 As shown, the pressure-bearing part 223 and the force-transmitting part 224 can both be constructed as columns, and the force-transmitting part 224 is constructed as a hollow column. The diameter of the pressure-bearing part 223 is smaller than the diameter of the force-transmitting part 224, that is, the push rod 22 as a whole has a stepped columnar structure, so as to reduce the material used in the pressure-bearing part 223, thereby reducing the weight of the spring ballpoint pen.

[0045] Furthermore, in order to move stably along the locking member 21 within it, the push rod 22 may have a plurality of circumferential protrusions spaced apart from each other, for example, evenly spaced. For example, as... Figure 5 As shown, the outer wall of the columnar force-transmitting part 224 has eight evenly spaced circumferential protrusions 222, correspondingly, as Figure 8 As shown, the locking member 21 may have locking member grooves for receiving these circumferential protrusions 222, and the detailed structure of the locking member 21 will be further described below. Further, refer to... Figure 5 The push rod 22 may have engagement teeth 221 on its lower end face for engaging with the cam rotator 23. The engagement teeth 221 protrude outward along the length of the push rod. Exemplarily, the engagement teeth 221 may include a first toothed surface 226 and a second toothed surface 227 arranged alternately in the circumferential direction, and the first toothed surface 226 and the second toothed surface 227 are abutted along one side at an angle relative to each other, thereby making the engagement teeth 221 triangular in shape and the spacing between the plurality of engagement teeth 221 also triangular in shape, so as to facilitate engagement with the cam rotator 23.

[0046] Furthermore, for example Figure 5 As shown, the push rod 22 may also include a flange 225 extending upward along the length of the bearing portion 223 for connection to the housing assembly 1 inside the housing assembly 1. Based on this configuration, the user can apply thrust directly to the housing assembly 1, which then transmits the thrust to the push rod 22. Specific details regarding this configuration will be further described in the following embodiments of the housing assembly.

[0047] Although the push rod is described as a stepped cylinder in this embodiment and may include a flange, a pressure-bearing portion and a force-transmitting portion, wherein the engaging teeth are formed on the force-transmitting portion, it is also conceivable that the push rod as a whole may have other shapes and may include more or fewer components than those described above. At the same time, while fulfilling its function, the engaging teeth described in the above embodiment may be formed on the force-transmitting portion with a different structure or on other parts of the push rod with a different structure.

[0048] Figure 6 This is a perspective view of the cam rotating member 23 of the telescopic mechanism according to an embodiment of this application, and Figure 7 yes Figure 6 A partial schematic diagram of the cam rotating component. (See attached diagram.) Figure 6 As shown, the compressible spring 4 is integrated into the lower end of the cam rotor 23 and extends downward along its length. Figure 7 As shown, the cam rotating member 23 may include a columnar main body 232 and a columnar guide portion 233 extending upward along the length of the main body 232, and the cross-sectional area of ​​the guide portion 233 is smaller than the cross-sectional area of ​​the main body 232. The guide portion 233 of the cam rotating member 23 is fitted into the inner cavity of the force transmission portion 224 of the push rod, so that under the positioning and guidance of the guide portion 233, the cam rotating member 23 can move under the action of the push rod 22 to compress the compressible spring 4. In order to better transmit the thrust to the compressible spring 4 at the lower end of the cam rotating member 23, the central axis of the guide portion 233 and the central axis of the main body 232 can be aligned with each other, the central axis of the pressure bearing portion 223 and the central axis of the force transmission portion 224 can be aligned with each other, and the central axes of the push rod 22, the cam rotating member 23, and the compressible spring 4 can be aligned with each other. Further, as shown in the figure... Figure 7 As shown, in order to engage with the engagement teeth 221 of the push rod, the main body 232 of the cam rotor 23 may have a snap-fit ​​portion 231 at its upper edge. The snap-fit ​​portion 231 is used to contact the engagement teeth 221 of the push rod 22, so as to apply thrust to the cam rotor 23. As an exemplary configuration, such as Figure 7 As shown, the engaging portion 231 is configured to include a plurality of elongated protrusions 234 spaced apart from each other and distributed circumferentially along the main body portion 232. These elongated protrusions 234 protrude radially and extend along the length of the main body portion 232. Further, each elongated protrusion 234 is configured as follows: Figure 7The cam 234 is a quadrangular prism with an engagement bevel 235 at its end. The engagement bevel 235 can be configured to at least partially contact the first tooth bevel 226 or the second tooth bevel 227 of the push rod 22. The radial projection height of the elongated ridge 234 is greater than the thickness of the first tooth bevel 226 and the second tooth bevel 227, so that when the engagement bevel 235 contacts the first tooth bevel 226 or the second tooth bevel 227 of the push rod 22, it can also engage with a portion of the locking member 21 that houses the push rod 22, so as to lock the position of the cam rotator 23 by the interaction of the three together.

[0049] Although the cam rotor is described in this embodiment as including a main body and a guide, with the engaging portion formed on the main body, it is also conceivable that the push rod may include more or fewer components than those described above. Furthermore, the engaging portion described in the above embodiment may be formed on a main body with a different structure or on other parts of the cam rotor with a different structure, provided that its function is satisfied.

[0050] Figure 8 and Figure 9 These are schematic diagrams of two embodiments of the locking member 21 of the telescopic mechanism according to embodiments of this application.

[0051] Figure 8 and Figure 9 The similarity between the embodiments is that the locking member 21 is generally hollow cylindrical and includes a plurality of first guide grooves 211 and a plurality of second guide grooves 212. These first guide grooves 211 and second guide grooves 212 are arranged alternately along the circumference of the locking member 21 and extend along the length direction, and the length (or depth) of the first guide groove 211 is greater than the length (or depth) of the second guide groove 212. The first guide grooves 211 and second guide grooves 212 are used to receive and engage the latching portion 231 of the cam rotating member 23, for example, the engagement ramp 235. Since the length of the first guide groove 211 is greater than that of the second guide groove 212, the length of the cam rotating member 23 engaged in the locking member 21 is longer than that of the second guide groove 212 when the engagement ramp 235 of the cam rotating member 23 engages in the first guide groove 211. This results in a shorter length of the portion that can support the pen refill 3. This engagement state of the cam rotating member 23 and the locking member 21 is referred to herein as the first engagement state, which corresponds to the pen tip retracted position. Similarly, when the engagement ramp 235 of the cam rotator 23 engages with the second guide groove 212, this engagement state between the cam rotator 23 and the locking member 21 is referred to herein as the second engagement state, which corresponds to the pen tip 31 protruding position. As an exemplary configuration, such as... Figure 8 and Figure 9As shown, the locking member 21 can be constructed as a hollow cylinder, comprising a plurality of circumferentially distributed fingers 213, each finger 213 having a guide slope 214 at its end for guiding and / or engaging the engagement slope 235. Adjacent fingers 213 are alternately spaced by a first guide groove 211 and a second guide groove 212 as described in the above embodiment. The locking member 21 may include a locking member groove for receiving and guiding the movement of the circumferential protrusion 222 of the push rod 22.

[0052] Figure 8 and Figure 9 The difference in the illustrated embodiment is that: Figure 8 In the illustrated embodiment, a first guide groove 211 and a second guide groove 212 are formed on the outer peripheral surface of the locking member 21, wherein the finger-like portion 213 is configured as part of the outer wall of the locking member 21. In this case, the aforementioned locking member groove is configured as an inner groove 217 formed on the inner peripheral surface of the locking member 21, and the inner groove 217 is different from the first guide groove 211 and the second guide groove 212. The circumferential protrusion 222 of the push rod 22 is received in the inner groove 217 and can move along the inner groove 217. And as... Figure 8 As shown, the first guide groove 211 is formed by the side surfaces 215 and bottom stop slopes 216 of each of two adjacent finger-like portions 213, while the second guide groove 212 is constructed as a triangular cut formed by the side surface 215 of one of the two adjacent finger-like portions 213 and the guide slope 214 of the other. For locking the pen tip in the retracted position, the elongated protrusion 234 of the cam rotator 23 can move along the first guide groove 211, and the engaging slope 235 of the elongated protrusion 234 can engage with the bottom stop slope 216 of the first guide groove 211, thereby preventing further movement of the cam rotator 23 to lock the retracted position. For locking the pen tip in the extended position, the engaging slope 235 of the cam rotator 23 can engage with the triangular cut, thereby preventing further movement of the cam rotator 23 to lock the extended position. And... Figure 9 In the illustrated embodiment, both the first guide groove 211 and the second guide groove 212 of the locking member 21 are formed on the inner peripheral surface of the locking member 21, wherein the finger-like portions 213 are configured to protrude radially from the inner peripheral surface of the locking member 21. In this case, the first guide groove 211 also serves as the aforementioned locking member recess, that is, the elongated rib 234 of the cam rotator 23 and the circumferential protrusion 222 of the push rod 22 share the first guide groove 211. The elongated rib 234 is accommodated in the first guide groove 211 and can move along it, and the circumferential protrusion 222 of the push rod 22 is also accommodated in the first guide groove 211 and can move along it. In this case, the first guide groove 211 is formed by the side surfaces 215 of each of the two adjacent finger-like portions 213, and does not include... Figure 8The bottom stop slope 216 in the illustrated embodiment. To limit the movement of the cam rotator 23, for example... Figure 7 As shown, the cam rotator 23 also includes an arc-shaped joint 236 connecting two adjacent elongated protrusions 234, and the length of the arc-shaped joint 236 is less than the length of the elongated protrusions 234. Accordingly, see Figure 9 The locking member 21 may further include a stepped portion 218 for abutting against the arcuate engagement portion 236, with fingers 213 formed on the surface of the stepped portion 218 and guide ramps 214 of the fingers 213 extending beyond the edge of the stepped portion 218. When the cam rotator 23 engages with the push rod housed in the locking member 21, the arcuate engagement portion 236 abuts against the stepped portion 218 to prevent further movement of the cam rotator 23. Figure 9 The structure of the second guide groove in the illustrated embodiment is similar to Figure 8 The structure of the second guide groove in the illustrated embodiment.

[0053] In addition to protecting the components housed within it, the housing assembly may also provide a push-button mechanism for user operation. This will be discussed below. Figures 2 to 3 as well as Figures 10 to 13 To describe an embodiment of the housing assembly.

[0054] like Figure 2 and Figure 3 As shown, in one embodiment, the housing assembly 1 may include an upper housing 11, a lower housing 12, an intermediate sleeve 14 connected between the two, and a support member 13 for abutting the pen refill 3. The components of the housing assembly are further described below.

[0055] Figure 10 This is a perspective view of the upper housing of the housing assembly according to an embodiment of this application. (Refer to...) Figure 10 The upper housing 11 can be, for example, hollow cylindrical to provide accommodating space. The various components of the telescopic mechanism 2 in the above embodiment, such as the push rod 22, the cam rotator 23, and the upper section of the pen refill 3, can be arranged within the upper housing 11. The upper housing 11 can include, from top to bottom, an actuating part 111 and a compressible part 112 connected to each other. The actuating part 111 is used to directly withstand the pushing force from the user, see reference... Figure 2 and Figure 3The push part 111 may have multiple claws 114 arranged circumferentially around the central axis on its top inner side, extending downward from the top inner wall. A portion of the telescopic mechanism 2, such as the flange 225 of the push rod 22, may be held by these claws. The compressible part 112 may include a helical spring of a certain thickness and width, the structure of which may be similar to the compressible spring 4 in the above embodiment. The compressible part 112 may also be made of plastic material, configured to be compressed under the action of a thrust and to return to its original shape and thus generate an upward rebound force when the thrust is released. In use, the thrust applied by the user to the push part 111 can be first transmitted to the pressure-bearing part 223 of the push rod 22, and then transmitted through the force transmission part 224 of the push rod 22 to the cam rotating member 23 engaged with the push rod 22, and then transmitted to the compressible spring 4 integrated at the lower end of the cam rotating member 23, so that the compressible spring 4 is compressed to facilitate the extension and retraction of the pen tip 31. In this embodiment, by forming a portion of the upper housing 11 as a push button 111, the cross-sectional dimension of the push button 111 can be approximately the same as that of the upper housing 11. Therefore, the push button 111 has a larger cross-sectional dimension, which increases the contact area of ​​the user's fingers during operation, thereby improving the comfort of pressing with the fingers. Furthermore, by forming another portion of the upper housing 11 as a compressible portion 112 that cooperates with the push button 111, the user's pressing operation becomes easier, and the transmission becomes less strenuous.

[0056] In the previous embodiment, the thrust is applied indirectly to the push rod 22 via the pusher portion of the upper housing 11. In another embodiment, it is conceivable that the thrust can be applied directly to the push rod 22. In this case, the upper housing 11 may consist only of an upper main housing (not shown) configured as a hollow cylinder, without the aforementioned compressible portion 112 and pusher portion 111. The upper main housing may have an opening at the top to allow a portion of the push rod 22, such as the pressure-bearing portion 223, to extend out of the upper main housing. Based on this configuration, the user can apply the thrust directly to the push rod 22 to compress the compressible spring 4. Furthermore, in this case, a portion of the upper housing 11 can be used as... Figure 9 In the illustrated embodiment, the locking member 21, along with corresponding structural features such as the first guide groove 211, the second guide groove 212, and the finger-like portion 213, can be formed on the inner peripheral surface of the upper housing 11. Alternatively, in other embodiments, Figure 8 The locking element 21 in the illustrated embodiment can also be disposed as a separate component in the upper housing 11 and connected to the upper housing 11.

[0057] Furthermore, for example Figure 10As shown, a pen clip 113 may be provided laterally on the outer wall of the upper housing 11. The pen clip 113 may have a fixed end and a free end, wherein the fixed end is located at the top of the upper housing 11, while the free end is not connected to any component. The pen clip 113 extends generally downward from the top along the length of the upper housing 11, and there is a clamping gap between the pen clip 113 and the outer wall of the upper housing 11. The extension of the pen clip 113 is configured such that the clamping gap between the pen clip 113 and the outer wall of the upper housing 11 gradually decreases from top to bottom, that is, the clamping gap between the free end and the outer wall of the housing is minimized. The free end is configured such that under the action of external force, the free end can open outward in the radial direction, so that the clamping gap is further expanded, so that a target object such as a book can be inserted into the clamping gap, and that the free end can return to its original shape after the external force is released, so as to clamp the spring ballpoint pen on the target object.

[0058] Figure 11 This is a perspective view of the lower housing of the housing assembly according to an embodiment of this application. Figure 11 As shown, the lower housing 12 can be generally hollow cylindrical to provide accommodating space. The lower section of the pen refill 3 and the support member 13 can be disposed inside the lower housing 12, see [reference]. Figure 2 and Figure 3 The lower housing 12 may include a body portion 121 and a pen tip limiting portion 122. The body portion 121 may be a hollow cylinder, and the cross-section of the pen tip limiting portion 122 may gradually narrow from top to bottom, forming a generally frustum-shaped structure. The pen tip is disposed in the pen tip limiting portion 122, and the pen tip can move downward inside the pen tip limiting portion under the action of a thrust to allow the pen tip to extend out of the lower housing.

[0059] Figure 12 This is a perspective view of the intermediate sleeve 14 of the housing assembly according to an embodiment of this application. Figure 12 As shown, the intermediate sleeve 14 can be, for example, a hollow cylindrical shape. The intermediate sleeve 14 can be located inside the upper housing 11, and the intermediate sleeve 14 can have a first threaded connection portion 141 at its lower end. Correspondingly, the upper end of the lower housing 12 can have a second threaded connection portion 123 (see...). Figure 11 Thus, the lower housing 12 and the intermediate sleeve 14 can be connected together by a threaded engagement, and the lower housing 12 is mated with the upper housing 11 to form a complete housing assembly. See [link to documentation]. Figure 2 and Figure 3 The upper part of the intermediate sleeve 14 can be used as... Figure 9 In the embodiment shown, the locking member 21, along with corresponding structural features such as the first guide groove 211, the second guide groove 212, and the finger-like portion 213, can be formed on the inner circumferential surface of the intermediate sleeve 14. In this case, as... Figure 2 and Figure 3 As shown, at least the force transmission part 224 of the push rod 22 and the cam rotating part 23 can be arranged in the upper part of the intermediate sleeve 14 to achieve the locking of the pen tip position.

[0060] As previously mentioned, in other embodiments, the upper housing 11 may consist only of an upper main housing constructed as a hollow cylinder without the aforementioned compressible portion 112 and push-button portion 111. In this case, the aforementioned intermediate sleeve 14 may not be provided between the upper housing 11 and the lower housing 12. One of the upper housing 11 and the lower housing 12 may have a first threaded connection portion, and the other may have a corresponding second threaded connection portion, so that the upper housing 11 and the lower housing 12 can be connected together by the engagement of the first and second threaded connection portions.

[0061] Figure 13 This is a perspective view of the support member of the housing assembly according to an embodiment of this application. Figure 13 As shown, the support member 13 may be cylindrical, for example, to accommodate a portion of the pen refill 3. The support member 13 may be wholly or at least partially disposed inside the lower housing 12. The upper end of the support member 13 may abut against the compressible spring 4, and the lower end of the support member 13 may abut against at least a portion of the lower housing 12 inside the lower housing 12. One end of the compressible spring 4 is integrated into the cam rotation member 23, and the other end abuts against the support member 13, meaning the compressible spring 4 is confined between the cam rotation member 23 and the support member 13. When the compressible spring 4 is subjected to a thrust from the cam rotation member 23, since the support member 13 is stationary, the compressible spring 4 is compressed between the cam rotation member 23 and the support member 13.

[0062] In the above embodiments, either or both of the upper housing 11 and the lower housing 12 may be made partially or entirely of transparent plastic material to form an ultra-transparent pen body structure, thereby enhancing the aesthetic appearance of the housing assembly. Any or more of the components disposed inside the upper housing 11 and the lower housing 12, such as the components of the telescopic mechanism, the intermediate sleeve, and the support member, may be made of plastic material of any color selected from green, red, yellow, black, purple, pink, blue, and transparent.

[0063] The following describes the embodiments described above, with reference to... Figure 2 and Figure 3 This describes the relative positional relationships between the various components of a spring-loaded ballpoint pen in its assembled state.

[0064] like Figure 2 and Figure 3As shown, the upper housing 11 is joined to the lower housing 12 via an intermediate sleeve 14 to form the housing assembly of a spring-loaded ballpoint pen. The intermediate sleeve 14 is located inside the upper housing 11, and at least the force-transmitting portion 224 of the push rod 22 and the cam rotating member 23 are located inside the intermediate sleeve 14. The support member 13 is located inside the lower housing 12. The length of the compressible spring 4 integrated at the lower end of the cam rotating member 23 can be fixed to extend through the intermediate sleeve 14 and into the lower housing 12, so that the lower end of the compressible spring 4 can abut against the support member 13 located inside the lower housing 12. The receiving space formed by the helical portion of the compressible spring 4 communicates with the interior of the support member 13, thereby forming an internal space for accommodating approximately the entire pen refill 3, i.e., the pen tube. The pen refill 3 is located in this internal space, and the upper end of the pen refill 3 abuts against the lower end of the cam rotating member 23, so that when the cam rotating member 23 moves downward, the pen refill 3 can move downward under the action of thrust. The components of the spring ballpoint pen 10, from the outside to the inside, are as follows: upper shell 11 and lower shell 12 (which abut against each other and are in an upper-lower relationship), middle sleeve 14, compressible spring 4 and support member 13 (which abut against each other and are in an upper-lower relationship), and pen refill 3.

[0065] The following will refer to the embodiments of the aforementioned housing assembly and telescopic mechanism, and refer to... Figure 2 and Figure 3 as well as Figure 8 and Figure 9 This section describes in detail the pen tip extension and retraction housing assembly, as well as the process and principles of locking the pen tip in the extended and retracted positions.

[0066] Regarding the process of pen tip extension:

[0067] Initially (i.e., when the pen tip 31 is locked in the retracted position), the push rod 22 and the cam rotation member 23 are both located within the locking member 21, causing the pen tip 31 to retract into the lower housing. The relative positional relationship of the various components in the retracted position will be explained below with reference to the two embodiments of the locking member 21 described above.

[0068] When the locking member groove of the locking member 21 is constructed as an inner groove 217 independent of the first guide groove 211, see Figure 8 At this time, the two sidewalls of the elongated protrusion 234 of the cam rotator 23 contact the inner wall of the first guide groove 211, and the engagement slope 235 at the end of the elongated protrusion 234 engages with the bottom stop slope 216 of the first guide groove 211. Simultaneously, the engagement slope 235 can also contact the first tooth slope 226 or the second tooth slope 227 of the push rod 22, because the radial protrusion height of the elongated protrusion 234 is greater than the thickness of the first tooth slope 226 or the second tooth slope 227. The circumferential protrusion 222 of the push rod 22 is accommodated in the inner groove 217. See also... Figure 9When the first guide groove 211 of the locking member 21 is used as a locking member recess, the elongated protrusion 234 and the circumferential protrusion 222 are both accommodated within the first guide groove 211, and the sidewalls of each of the elongated protrusion 234 and the circumferential protrusion 222 are in contact with the inner wall of the first guide groove 211. The arc-shaped joint 236 abuts against the stepped portion 218, preventing the elongated protrusion 234 from moving upward along the first guide groove 211. The following will use... Figure 8 The locking mechanism in the illustrated embodiment further describes how it locks the pen refill position.

[0069] The user presses the spring-loaded ballpoint pen, thereby directly or indirectly applying a pushing or pressing force to the push rod 22. Under the pushing force, the circumferential protrusion 222 of the push rod 22 moves downward along the inner groove 217. Since the first toothed surface 226 or the second toothed surface 227 contacts the engaging surface 235, the push rod 22 can push the cam rotating member 23 downward, thereby applying a pushing force to the compressible spring 4 and the pen tip 3 located at the lower end of the cam rotating member 23. Since the lower end of the compressible spring 4 abuts against the support member 13 and cannot move downward, the compressible spring 4 is compressed. At the same time, the pen tip 3, which abuts against the cam rotating member 23, moves downward under the pushing force, so that the pen tip 31 is fully extended out of the lower housing 12. When the pen tip 31 is in the extended position, the cam rotating member 23 fully moves out of the locking member 21, so that the engaging surface 235 of the cam rotating member 23 can subsequently engage with the second guide groove 212. At the same time, at least a portion of the toothed surface of the push rod 22 moves out of the locking member 21. When the thrust is released, the lower cam rotator 23 moves upward due to the upward rebound force of the compressed compressible spring 4; on the upper side, since the engagement slope 235 remains in contact with the toothed slope, the cam rotator 23 is subjected to the lateral force of the toothed slope, thus causing circumferential rotation. During this process, on the one hand, the upward movement of the cam rotator 23 gradually brings it closer to the end of the locking member 21, and on the other hand, due to the rotation of the cam rotator, it gradually rotates circumferentially from the alignment position with the first guide groove 211 to the alignment position with the second guide groove 212. When aligned with the second guide groove 212, with the upward movement, the engagement slope 235 of the cam rotator 23 engages in the slit-shaped second guide groove 212, thus preventing the cam rotator 23 from moving further upward or rotating circumferentially. In this way, the pen tip 31 is locked in the extended position. See [reference needed]. Figure 3 .

[0070] Regarding the retraction process of the pen tip:

[0071] The retraction process of the pen tip 31 is similar to the extension process. In fact, it is the cam rotating part 23 switching from the engagement state with the second guide groove 212 to the engagement state with the first guide groove 211. Therefore, the description will be simplified appropriately.

[0072] When the user applies a pushing force, the push rod 22 and the cam rotating member 23 move downwards, causing the engagement slope 235 of the cam rotating member 23 to gradually disengage from the second guide groove 212 of the locking member 21, which is a cut-out structure. When the user releases the pushing force, the cam rotating member 23, under the action of the upward rebound force of the compressible spring 4 and the lateral force of the tooth slope of the engagement tooth 221, moves upwards, driving the push rod 22 and the pen tip 3 upwards. At the same time, it also rotates circumferentially. Specifically, in the circumferential direction, the cam rotating member 23 gradually rotates from the position aligned with the second guide groove 212 to the position aligned with the first guide groove 211. When aligned with the first guide groove 211, with the upward movement, the elongated protrusion 234 of the cam rotating member 23 enters the first guide groove 211 and moves along the first guide groove 211 until it abuts against the bottom stop slope 216, thus locking the pen tip 31 in the retracted position. See [link to relevant documentation]. Figure 2 .

[0073] It should be noted that the engagement slope 235 of the cam rotator 23 can maintain contact with the first tooth slope 226 or the second tooth slope 227 of the push rod 22, so that the first tooth slope 226 or the second tooth slope 227 can apply a downward force to the engagement slope 235 (when the thrust is applied), and apply a lateral force to the engagement slope 235 to make it rotate circumferentially (after the thrust is released). Moreover, due to the restriction of the inner groove, the push rod 22 can only move linearly along the inner groove throughout the entire process and will not rotate.

[0074] In related technologies, the compressible spring is typically arranged as a separate component at the bottom of the pen. The thrust is transmitted to the compressible spring via a force-transmitting component positioned between the telescopic mechanism and the spring. This usually necessitates a limiting part on the pen refill or force-transmitting component to confine the compressible spring between the lower end of the housing assembly and the limiting part. This arrangement results in a large number of components and a dispersed distribution, requiring a large housing space and hindering pen miniaturization. In contrast, this application places the compressible spring at the lower end of the telescopic mechanism and integrates the two into a single unit. This reduces the number of required components while achieving the basic function, resulting in a more compact internal structure for the spring-loaded ballpoint pen. This contributes to the extreme compactness of the spring-loaded ballpoint pen, making it easier to store and carry.

[0075] Although this application has been described with reference to exemplary embodiments, it should be understood that this application is not limited to the specific embodiments described and shown above. Without departing from the scope defined by the claims and the specification, those skilled in the art can make various changes and substitutions to the exemplary embodiments.

Claims

1. An ultra-transparent, extremely compact spring-loaded ballpoint pen, characterized in that, The spring-loaded ballpoint pen (10) includes a housing assembly (1) and a telescopic mechanism (2). The housing assembly (1) is used to accommodate the telescopic mechanism (2) and the pen refill (3); wherein the telescopic mechanism (2) is located on the upper part of the housing assembly (1), and the telescopic mechanism (2) has a compressible spring (4) integrally formed with a part of the telescopic mechanism (2) at its lower end; wherein the telescopic mechanism (2) is configured to move downward under the action of a thrust to apply a thrust to the compressible spring (4) and the pen refill (3), such that the compressible spring (4) is compressed, and the telescopic mechanism (2) locks the pen tip (31) of the pen refill (3) in the extended position and the retracted position by means of the rebound force of the compressible spring (4); and The housing assembly (1) includes an upper housing (11) and a lower housing (12) connected to each other. The telescopic mechanism (2) is disposed inside the upper housing (11). The upper housing (11) includes a push part (111) and a compressible part (112) connected to each other. The compressible part (112) is formed as a helical spring.

2. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 1, characterized in that, The compressible spring (4) is made of plastic material and has a helical part (41) with a flat rectangular cross-section.

3. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 1 or 2, characterized in that, The telescopic mechanism (2) includes a locking member (21), a push rod (22), and a cam rotating member (23) disposed at the lower end of the push rod (22). The compressible spring (4) is integrally formed at the lower end of the cam rotating member (23). The push rod (22) is configured to move along the length of the locking member (21) inside the locking member (21) and to apply a thrust to the cam rotator (23); The cam rotator (23) is configured to lock the pen tip (31) in the extended position when in a first engagement state with the locking member (21), and to lock the pen tip (31) in the retracted position when in a second engagement state with the locking member (21).

4. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 3, characterized in that, The locking member (21) includes a plurality of first guide grooves (211) and a plurality of second guide grooves (212), the first guide grooves (211) and the second guide grooves (212) are arranged alternately to each other along the circumference of the locking member (21), and the length of the first guide groove (211) is greater than the length of the second guide groove (212). The push rod (22) has a toothed portion (221) on its lower end face; the cam rotator (23) has a snap-fit ​​portion (231) on its upper edge, the snap-fit ​​portion (231) being configured to contact the toothed portion (221); When the latching part (231) engages with the first guide groove (211), the cam rotating member (23) is in the first engagement state with the locking member (21); when the latching part (231) engages with the second guide groove (212), the cam rotating member (23) is in the second engagement state with the locking member (21).

5. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 4, characterized in that, The engaging tooth portion (221) of the push rod (22) includes a first tooth helix (226) and a second tooth helix (227) arranged alternately in the circumferential direction, the first tooth helix (226) and the second tooth helix (227) being at an angle relative to each other.

6. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 5, characterized in that, The push rod (22) has a plurality of circumferential protrusions (222) surrounding the outer wall, and the locking member (21) has a plurality of locking member grooves, each circumferential protrusion (222) engaging into a corresponding locking member groove and being movable along the locking member groove.

7. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 6, characterized in that, The push rod (22) includes a pressure-bearing part (223) and a hollow columnar force transmission part (224), and the engaging tooth part (221) and the circumferential protrusion (222) are disposed on the columnar force transmission part (224).

8. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 7, characterized in that, The push rod (22) also includes a flange (225) that extends upward from the pressure bearing portion (223) for connection to the housing assembly (1).

9. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 7, characterized in that, The cam rotator (23) includes a columnar main body (232) and a columnar guide (233) extending upward along the length of the main body (232). The cross-sectional area of ​​the guide (233) is smaller than that of the main body (232). The guide (233) is fitted into the columnar force transmission part (224). The compressible spring (4) is disposed at the lower end of the main body (232) and extends downward along the length. The snap-fit ​​portion (231) is configured as a plurality of elongated protrusions (234) spaced apart from each other and distributed circumferentially along the main body portion (232), the elongated protrusions (234) protruding radially and extending along the length of the main body portion (232).

10. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 9, characterized in that, Each elongated protrusion (234) is constructed in the shape of a quadrangular prism and has a joint bevel (235) at the end, the radial protrusion height of the elongated protrusion (234) being greater than the thickness of the first tooth bevel (226) and the second tooth bevel (227).

11. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 10, characterized in that, The locking member (21) is constructed as a hollow cylinder and includes a plurality of circumferentially distributed fingers (213), each of the fingers (213) having a guide slope (214) at its end, and adjacent fingers (213) are alternately spaced apart by the first guide groove (211) and the second guide groove (212).

12. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 4, characterized in that, The housing assembly (1) includes a support member (13), The support member (13) is located inside the lower housing (12), with one end of the support member (13) abutting against the inner wall of the lower housing (12) and the other end abutting against the lower end of the compressible spring (4).

13. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 12, characterized in that, The push part (111) is connected to the push rod (22) on the inner side of its lower end, and the compressible part (112) is configured to undergo elastic deformation under the action of thrust to apply thrust to the push rod (22).

14. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 1, characterized in that, The lower housing (12) includes a body part (121) and a pen tip limiting part (122). The body part (121) is a hollow cylindrical shape, and the pen tip limiting part (122) is configured such that the cross-section gradually narrows from top to bottom.

15. The ultra-transparent, ultra-compact spring-loaded ballpoint pen according to claim 12, characterized in that, The housing assembly (1) further includes an intermediate sleeve (14) located inside the upper housing (11) and having a first threaded connection (141) at its lower end. The lower housing (12) has a second threaded connection (123) at its upper end corresponding to the first threaded connection (141), and the upper portion of the intermediate sleeve (14) serves as the locking member (21).

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