Ultra-transparent extremely-compact spring ballpoint pen

Abstract

The invention provides an ultra-transparent extremely-compact spring ballpoint pen which comprises a shell assembly and a telescopic mechanism, and the shell assembly is used for containing the telescopic mechanism and a refill. The telescopic mechanism is located on the upper portion of the shell assembly, the lower end of the telescopic mechanism is provided with a compressible spring integrated with a part of the telescopic mechanism, and the telescopic mechanism is constructed to move downwards under the action of thrust to apply thrust to the compressible spring so that the compressible spring can be compressed. The compressible spring is configured to elastically deform such that the tip of the cartridge extends out of and retracts into the housing assembly. 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. The parts of the telescopic mechanism and the compressible spring transmit thrust to each other, and the transmission is more labor-saving by arranging a specific structure.

Description

Technical Field

[0001] The present application relates to the technical field of writing utensils, and more specifically, to an ultra-transparent and extremely compact spring ballpoint pen. Background Art

[0002] Writing pens such as ballpoint pens are very necessary tools for both working and learning groups. Among them, push-type writing pens are widely popular due to their advantages such as easy operation and no need to keep pen caps.

[0003] The compressible spring in the push-type writing pen is a necessary component to realize the extension and retraction of the pen tip into the housing. In the related art, the compressible spring is usually arranged at the lower part of the housing as a single component independent of other components, but this will result in a large number of components of the writing pen, and the distribution of each component will be relatively scattered, resulting in a large housing space required to accommodate these components, which is not conducive to the extreme compactness of the writing pen, and too many components are not convenient for users to keep. Summary of the invention

[0004] In view of the above technical problems, an object of the present application is to provide an improved spring ballpoint pen having a smaller number of components and a compact structure.

[0005] Another object of the present application is to provide an improved spring ballpoint pen which is more beautiful and has better pressing comfort.

[0006] According to one aspect of the present application, a spring ballpoint pen is provided, which includes a shell assembly and a telescopic mechanism, wherein the shell assembly is used to accommodate the telescopic mechanism and a refill; and the telescopic mechanism is located at the upper part of the shell assembly, and the telescopic mechanism has a compressible spring formed integrally with a part of the telescopic mechanism at the lower end, wherein the telescopic mechanism is configured to move downward under the action of a thrust to apply a thrust to the compressible spring and the refill, so that the compressible spring is compressed, and the telescopic mechanism locks the tip of the refill in an extended position and a retracted position under the action of the rebound force of the compressible spring.

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

[0008] In some embodiments, the telescopic mechanism includes a locking member, a push rod and a cam rotating member arranged at the lower end of the push rod, the cam rotating member is provided with a compressible spring at the lower end, wherein the push rod is configured to be able to move inside the locking member along the length of the locking member and apply a thrust to the cam rotating member; the cam rotating member is configured to lock the pen tip in an extended position when it is in a first engagement state with the locking member, and to lock the pen tip in a retracted position when it is in a second engagement 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 the second guide grooves are alternately arranged with each other along the circumference of the locking member, and the length of the first guide groove is greater than the length of the second guide groove; the push rod has an engaging tooth portion at the lower end edge; the cam rotating member has a clamping portion at the upper end edge, and the clamping portion is configured to contact the engaging tooth portion; wherein, when the clamping portion engages with the first guide groove, the cam rotating member is in a first engaging state with the locking member; when the clamping portion engages with the second guide groove, the cam rotating member is in a second engaging state with the locking member.

[0010] In some embodiments, the engaging tooth portion of the push rod includes first tooth bevels and second tooth bevels alternately arranged in the circumferential direction, and the first tooth bevels and the second tooth bevels are butted along one edge at a certain angle relative to each other.

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

[0012] In some embodiments, the push rod includes a pressure-bearing portion and a hollow cylindrical force-transmitting portion, and the engaging tooth portion and the circumferential protrusion are arranged on the cylindrical force-transmitting portion.

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

[0014] In some embodiments, the cam rotating member includes a columnar main body portion and a columnar guide portion extending upward from the main body portion along the length, the cross-sectional area of ​​the guide portion is smaller than the cross-sectional area of ​​the main body portion, the guide portion is fitted into the columnar force transmission portion, and a compressible spring is arranged at the lower end of the main body portion and extends downward along the length; the clamping portion is configured as a plurality of elongated ridges spaced apart from each other and distributed circumferentially along the main body portion, the elongated ridges protrude radially and extend along the length of the main body portion.

[0015] In some embodiments, each of the elongated protrusions is configured in a quadrangular prism shape and has a joint bevel at an end thereof, and a radially protruding height of the elongated protrusion is greater than a thickness of the first tooth bevel and the second tooth bevel.

[0016] In some embodiments, the locking element is configured in a hollow cylindrical shape and includes a plurality of fingers distributed circumferentially, each finger having a guiding slope at an end thereof, and two adjacent fingers are alternately spaced apart by a first guiding groove and a second guiding groove.

[0017] In some embodiments, the shell assembly includes an upper shell and a lower shell connected to each other and a support member, the telescopic mechanism is arranged inside the upper shell, the support member is located inside the lower shell, one end of the support member abuts against the inner wall of the lower shell and the other end abuts against the lower end of the compressible spring.

[0018] In some embodiments, the upper shell includes a push portion and a compressible portion connected to each other, wherein the push portion is connected to the push rod on the inner side of the lower end, and the compressible portion is configured to undergo elastic deformation under the action of the thrust to apply thrust to the push rod.

[0019] In some embodiments, the compressible portion of the upper housing is formed as a coil spring.

[0020] In some embodiments, the lower shell includes a main body and a pen tip limiting portion, the main body is in a hollow cylindrical shape, and the pen tip limiting portion is configured such that a cross section gradually narrows from top to bottom.

[0021] In some embodiments, the housing assembly further comprises an intermediate sleeve, which is located inside the upper housing and has a first threaded connection at the lower end, the lower housing has a second threaded connection at the upper end corresponding to the first threaded connection, and the upper portion of the intermediate sleeve serves as a locking member.

[0022] The spring ballpoint pen according to the embodiment of the present application includes a housing assembly, a telescopic mechanism and a refill, wherein the telescopic mechanism is provided with a compressible spring and a telescopic mechanism integrated with the structure at the lower end, thereby reducing the number of components of the spring ballpoint pen, making its internal structure more compact, and contributing to the refinement of the spring ballpoint pen. In addition, by providing a pressing portion with a larger force-bearing area at the upper portion of the housing, the comfort of pressing by the finger is improved. The components of the telescopic mechanism and the compressible spring transmit thrust to each other, and the transmission is made more labor-saving by providing a specific structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of the embodiments of the present application will become more easily understood through the following description with reference to the accompanying drawings. Unless otherwise specified, the same elements, features and components having the same functions and having the same effects are each provided with the same reference numerals. In the accompanying drawings:

[0024] Figure 1 is a three-dimensional schematic diagram of a spring ballpoint pen according to an embodiment of the present application;

[0025] Figure 2 yes Figure 1 The front view and the cross-sectional view along the line AA of the spring ballpoint pen shown when the pen tip is in the retracted position;

[0026] Figure 3 yes Figure 1The front view and the cross-sectional view along the line AA of the spring ballpoint pen shown when the pen tip is in the extended position;

[0027] Figure 4 is a three-dimensional schematic diagram of a pen refill according to an embodiment of the present application;

[0028] Figure 5 is a three-dimensional schematic diagram of a push rod of a telescopic mechanism according to an embodiment of the present application;

[0029] Figure 6 is a three-dimensional schematic diagram of a cam rotating member integrated with a compressible spring of a telescopic mechanism according to an embodiment of the present application;

[0030] Figure 7 yes Figure 6 A partial schematic diagram of a cam rotating member;

[0031] Figure 8 is a three-dimensional schematic diagram of an embodiment of a locking member of a telescopic mechanism according to an embodiment of the present application;

[0032] Fig. 9 is a cross-sectional schematic diagram of another embodiment of a locking member of a telescopic mechanism according to an embodiment of the present application;

[0033] Fig.10 is a three-dimensional schematic diagram of an upper shell of a shell assembly according to an embodiment of the present application;

[0034] Fig.11 is a three-dimensional schematic diagram of a lower shell of a shell assembly according to an embodiment of the present application;

[0035] Fig.12 is a three-dimensional schematic diagram of an intermediate sleeve of a housing assembly according to an embodiment of the present application;

[0036] Fig.13 It is a three-dimensional schematic diagram of a support member of a shell assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] The spring ballpoint pen according to the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be noted that the present application is not limited to the following embodiments.

[0038] The accompanying drawings are intended to convey a further understanding of the embodiments of the present application. The accompanying drawings illustrate the embodiments and are used in conjunction with the specification to explain the principles and concepts of the present application. The elements of the accompanying drawings are not necessarily drawn to scale relative to each other. In this article, the orientation nouns such as "upper end", "upper end", "upper part", "lower end", "lower end", and "lower part" used are determined based on the posture of the spring ballpoint pen in actual use. For example, the part held by the user's hand is called the lower part of the spring ballpoint pen. These orientation nouns are used only to more clearly describe the relative position relationship between the structures, not to describe the absolute orientation. Unless otherwise clearly defined, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or number limitation. The term "multiple" refers to two or more.

[0039] Figure 1 A three-dimensional schematic diagram of a spring ballpoint pen according to an embodiment of the present application is shown, which shows the general appearance structure of the spring ballpoint pen. Figure 2 and Figure 3 They are shown respectively Figure 1 The tip of the spring ballpoint pen is shown in a retracted position and an extended position. It should be noted that although the spring ballpoint pen according to the embodiment of the present application is shown in the form of a ballpoint pen in each figure, the spring ballpoint pen is not limited to a ballpoint pen, and can also be a pen of the type in the art such as a stylus pen, an electronic pen, a pressurized pen, an anti-fall pen, an automatic pen, a thermochromic pen, etc.

[0040] Reference Figure 2 and Figure 3 In the embodiment of the present application, the spring ballpoint pen 10 includes a housing assembly 1, a telescopic mechanism 2 and an optional refill 3. For example, the finished push-writing pen 10 in the embodiment of the present application may include the refill 3 itself, or the finished push-writing pen does not include the refill 3, and the refill 3 can be assembled in the writing pen as a single piece by the user when in use. The housing assembly 1 is used to provide a storage 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 accommodated inside the housing assembly 1. The telescopic mechanism 2 has a compressible spring 4 at the lower end, and the compressible spring 4 is constructed as an integral part with the telescopic mechanism 2. The compressible spring 4 can be compressed by the thrust applied by the telescopic mechanism 2, whereby the compressible spring 4 will generate an upward rebound force due to elastic deformation. With the help of the rebound force of the compressible spring 4, the telescopic mechanism 2 can lock the pen 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 can include a spiral portion 41 in a spiral shape (see Figure 6 ), and can be constructed with a width greater than a thickness, so that its cross section is as follows Figure 2 and Figure 3The flat rectangular structure of the compressible spring helps to provide appropriate elastic force and increase fatigue strength to increase service life, and makes it easier for the user to press, that is, the transmission is more labor-saving.

[0041] In this article, "tip retracted position" means that the nib is fully retracted into the housing, and "tip extended position" means that the nib is extended out of the housing for writing. "Thrust" refers to the force applied by the user along the length of the spring ballpoint pen to actuate the spring ballpoint pen (extend and retract the nib), which can also be expressed as "pressing force", "pressing force", "actuation force" and other terms with the same meaning.

[0042] Figure 4 FIG. 2 shows a three-dimensional schematic diagram of a pen core according to an embodiment of the present application. Figure 4 The pen core 3 may include two parts: a pen tube 32 and a pen head 33, wherein the pen tube 32 is the main body of the pen core 3, for example, the pen tube 32 may be in the shape of a hollow cylinder, and contain ink and pen oil for writing; the pen head 33 is located at the lower end of the pen core 3, and the pen head 33 may include a pen tip 31 and a fixing part 34 for connecting to the pen tube 32, wherein the pen tip 31 is used to contact a writing carrier such as paper for writing; and the fixing part 34 is used to fix the pen head 33 to the pen tube 32 as a whole and can be engaged with a part of the shell inside the shell to limit the pen tip 31 to prevent the pen tip 31 from further moving.

[0043] 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. The compressible spring 4 in the above embodiment may be located at the lower end of the cam rotating member 23 and may be integrally formed with the cam rotating member 23 (see FIG. Figure 6 ). The locking member 21 is used to guide the push rod 22 to move inside the locking member 21 and to engage with the cam rotating member 23 to lock the position of the pen tip 31. The push rod 22 is configured to be able to move inside the locking member 21 along the length of the locking member 21 and apply a thrust to the cam rotating member 23. The cam rotating member 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.

[0044] The following will be combined Figures 5 to 9 To describe the exemplary structure of the various components of the telescopic mechanism of the spring ballpoint pen.

[0045] Figure 5 FIG. 2 is a perspective schematic diagram of a push rod 22 of a telescopic mechanism according to an embodiment of the present 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 may directly or indirectly bear the thrust applied by the user. Figure 2 As shown, a portion of the pressure-bearing portion 223 extends into the inner cavity of the housing assembly 1 for receiving pressure, so that the user can apply thrust to the pressure-bearing portion 223 through the housing assembly. The force-transmitting portion 224 can engage with the cam rotating member 23 at the lower end to transmit the thrust to the cam rotating member 23, and then transmit the thrust to the compressible spring 4 at the lower end of the cam rotating member 23, so as to realize the extension and retraction of the pen tip 31. For example, as Figure 5 As shown, the pressure-bearing portion 223 and the force-transmitting portion 224 can both be constructed into a columnar shape, and the force-transmitting portion 224 can be constructed into a hollow columnar shape, wherein the diameter of the pressure-bearing portion 223 is smaller than the diameter of the force-transmitting portion 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 portion 223, thereby reducing the weight of the spring ballpoint pen.

[0046] Furthermore, in order to stably move along the locking member 21 inside the locking member 21, the push rod 22 may have a plurality of circumferential protrusions spaced apart from each other, for example, evenly spaced apart, on the outer wall. Figure 5 As shown, the outer wall of the columnar force transmission portion 224 has eight circumferential protrusions 222 evenly spaced apart. Figure 8 As shown, the locking member 21 may have a locking member groove for accommodating these circumferential protrusions 222. The detailed structure of the locking member 21 will be further described below. Figure 5 The push rod 22 may have an engaging tooth portion 221 on the lower end surface for engaging with the cam rotating member 23, and the engaging tooth portion 221 protrudes outward along the length direction of the push rod. Exemplarily, the engaging tooth portion 221 may include a first tooth bevel 226 and a second tooth bevel 227 alternately arranged along the circumferential direction, and the first tooth bevel 226 and the second tooth bevel 227 are butted along one edge at a certain angle relative to each other, thereby making the engaging tooth portion 221 configured to be triangular and making the intervals between the multiple engaging tooth portions 221 also triangular, so as to facilitate engagement with the cam rotating member 23.

[0047] Furthermore, Figure 5 As shown, the push rod 22 may further include a flange portion 225 extending upward along the length from the pressure-bearing portion 223, so as to be connected to the housing assembly 1 at the inner side of the housing assembly 1. Based on this structure, the user can directly apply the thrust to the housing assembly 1, and then the housing assembly 1 transmits the thrust to the push rod 22. The specific details of this structure will be further described in the following embodiment of the housing assembly.

[0048] Although in the present embodiment the push rod is described as a stepped cylinder and may include a flange portion, a pressure-bearing portion and a force transmission portion, wherein the engaging tooth portion is formed on the force transmission portion, it is also conceivable that the push rod as a whole has other shapes and may include more or fewer components than the above-mentioned components. At the same time, while satisfying its function, the engaging tooth portion described in the above-mentioned embodiment may be formed on a force transmission portion having a different structure or on other parts of the push rod having a different structure.

[0049] Figure 6 is a three-dimensional schematic diagram of a cam rotating member 23 of a telescopic mechanism according to an embodiment of the present application, and Figure 7 yes Figure 6 A partial schematic diagram of the cam rotating member in FIG. Figure 6 As shown, the compressible spring 4 is integrated at the lower end of the cam rotating member 23 and extends downward along the length. Figure 7 As shown, the cam rotating member 23 may include a columnar main body portion 232 and a columnar guide portion 233 extending upward along the length from the main body portion 232, and the cross-sectional area of ​​the guide portion 233 is smaller than the cross-sectional area of ​​the main body portion 232. The guide portion 233 of the cam rotating member 23 fits 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 axes of the guide portion 233 and the main body portion 232 can be aligned with each other, the central axes of the pressure-bearing portion 223 and 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 Figure 7 As shown, in order to engage with the engaging tooth portion 221 of the push rod, the main body portion 232 of the cam rotating member 23 may have a clamping portion 231 at the upper end edge, and the clamping portion 231 is used to contact with the engaging tooth portion 221 of the push rod 22 so as to apply thrust to the cam rotating member 23. As an exemplary configuration, Figure 7 As shown, the clamping portion 231 is configured to include a plurality of elongated ridges 234 distributed along the circumference of the main body 232 and spaced apart from each other. These elongated ridges 234 protrude in the radial direction and extend along the length of the main body 232. Further, each elongated ridge 234 is configured to Figure 7The quadrangular prism shown has an engaging bevel 235 at the end. The engaging 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 protrusion height of the elongated convex strip 234 is greater than the thickness of the first tooth bevel 226 and the second tooth bevel 227, so that when the engaging 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 part of the locking member 21 that accommodates the push rod 22, so that the position of the cam rotating member 23 is locked by the interaction between the three.

[0050] Although in this embodiment the cam rotating member is described as including a main body portion and a guide portion, wherein the clamping portion is formed on the main body portion, it is also conceivable that the push rod may include more or fewer parts than the above-mentioned parts, and the clamping portion described in the above embodiment may be formed on a main body portion with a different structure or on other parts of the cam rotating member with a different structure while satisfying its function.

[0051] Figure 8 and Fig. 9 Schematic diagrams of two embodiments of the locking member 21 of the telescopic mechanism according to the embodiment of the present application.

[0052] Figure 8 and Fig. 9 The embodiment of the invention is similar in that the locking member 21 is in the shape of a hollow cylinder as a whole 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 with each other 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 groove 211 and the second guide groove 212 are used to accommodate and engage with the clamping portion 231 of the cam rotating member 23, such as the engaging inclined surface 235. Since the length of the first guide groove 211 is greater than that of the second guide groove 212, when the engaging inclined surface 235 of the cam rotating member 23 is engaged with the first guide groove 211, the length of the cam rotating member 23 engaged with the locking member 21 is longer than that of the second guide groove 212, thereby making the length of the portion that can support the pen core 3 shorter. This engagement state of the cam rotating member 23 and the locking member 21 is referred to as the first engagement state in this article, and the first engagement state corresponds to the retracted position of the pen tip. Similarly, when the engaging slope 235 of the cam rotating member 23 is engaged with the second guide groove 212, the engaging state of the cam rotating member 23 and the locking member 21 is referred to as the second engaging state herein, and the second engaging state corresponds to the extended position of the pen tip 31. As an exemplary configuration, Figure 8 and Fig. 9As shown, the locking member 21 may be configured as a hollow cylinder, which includes a plurality of finger-shaped portions 213 distributed circumferentially, each finger-shaped portion 213 may have a guide slope 214 at the end, and the guide slope 214 is used to guide the engagement slope 235 and / or to clamp the engagement slope 235. Two adjacent finger-shaped portions 213 are alternately spaced apart by the first guide groove 211 and the second guide groove 212 in the above embodiment. The locking member 21 may include a locking member groove for accommodating and guiding the movement of the circumferential protrusion 222 of the push rod 22.

[0053] Figure 8 and Fig. 9 The embodiment shown differs in that: Figure 8 In the illustrated embodiment, the first guide groove 211 and the second guide groove 212 of the locking member 21 are formed on the outer peripheral surface of the locking member 21, wherein the finger-shaped portion 213 is configured as a component of the outer wall of the locking member 21. In this case, the 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 projection 222 of the push rod 22 is accommodated in the inner groove 217 and can move along the inner groove 217. And as shown in FIG. Figure 8 As shown, the first guide groove 211 is composed of the side surface 215 and the bottom stop slope 216 of each of the two adjacent finger-shaped portions 213, and the second guide groove 212 is constructed as a triangular cutout formed by the side surface 215 of one of the two adjacent finger-shaped portions 213 and the guide slope 214 of the other. For locking the pen tip retracted position, the elongated protrusion 234 of the cam rotating member 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 the cam rotating member 23 from further moving to lock the retracted position. For locking the pen tip extended position, the engaging slope 235 of the cam rotating member 23 can engage with the triangular cutout, thereby preventing the cam rotating member 23 from further moving to lock the extended position. And in Fig. 9 In the illustrated embodiment, the first guide groove 211 and the second guide groove 212 of the locking member 21 are both formed on the inner peripheral surface of the locking member 21, wherein the finger-shaped portion 213 is 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 above-mentioned locking member groove, that is, the elongated protrusion 234 of the cam rotating member 23 and the circumferential protrusion 222 of the push rod 22 share the first guide groove 211, the elongated protrusion 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 composed of the side surfaces 215 of the two adjacent finger-shaped portions 213, and does not include Figure 8The bottom stop slope 216 in the illustrated embodiment. In order to limit the cam rotating member 23, Figure 7 As shown, the cam rotating member 23 further includes an arc-shaped joint portion 236 connected between two adjacent elongated protrusions 234, and the length of the arc-shaped joint portion 236 is less than the length of the elongated protrusion 234. Fig. 9 The locking member 21 may further include a step portion 218 for abutting against the arcuate engagement portion 236, the finger portion 213 being formed on the surface of the step portion 218 and the guide slope 214 of the finger portion 213 extending beyond the edge of the step portion 218. When the cam rotating member 23 is fitted to the push rod accommodated in the locking member 21, the arcuate engagement portion 236 can abut against the step portion 218 to prevent the cam rotating member 23 from further moving. Fig. 9 The structure of the second guide groove in the embodiment shown is similar to Figure 8 The structure of the second guide groove in the illustrated embodiment.

[0054] In addition to protecting the components disposed therein, the housing assembly may also provide a pressing portion for the user to press. Figures 2 to 3 as well as Figures 10 to 13 An embodiment of a housing assembly is described below.

[0055] 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 therebetween, and a support member 13 for abutting against the refill 3. The components of the housing assembly are further described below.

[0056] Fig.10 is a three-dimensional schematic diagram of the upper shell of the shell assembly according to an embodiment of the present application. Fig.10 The upper housing 11 may be, for example, hollow and cylindrical to provide a storage space. The components of the telescopic mechanism 2 in the above embodiment, such as the push rod 22, the cam rotating member 23 and the upper section of the refill 3, may be arranged in the upper housing 11. The upper housing 11 may include a pressing portion 111 and a compressible portion 112 connected to each other from top to bottom. The pressing portion 111 is used to directly bear the thrust from the user. Figure 2 and Figure 3The pressing part 111 may have a plurality of claws 114 arranged circumferentially around the central axis on the inner side of the top, and these claws extend downward from the inner wall of the top. A part 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 coil spring with a certain thickness and width, and its structure may be similar to the compressible spring 4 in the above embodiment. The compressible part 112 may also be made of a plastic material, which is configured to be compressed under the action of a thrust and to restore its original state after releasing the thrust, thereby generating an upward rebound force. When in use, the thrust applied by the user to the pressing part 111 may be first transmitted to the pressure-bearing part 223 of the push rod 22, and then transmitted to the cam rotating member 23 engaged with the push rod 22 through the force transmission part 224 of 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, so as to facilitate the extension and retraction of the pen tip 31. In this embodiment, by forming a part of the upper shell 11 as the pressing part 111, the cross-sectional dimension of the pressing part 111 can be roughly the same as the cross-sectional dimension of the upper shell 11, so the cross-sectional dimension of the pressing part 111 is larger, so that the force-bearing area of ​​the user's finger during operation will be larger, thereby improving the comfort of the finger pressing. In addition, by forming another part of the upper shell 11 as the compressible part 112 that cooperates with the pressing part 111, the user's pressing operation can be made easier, that is, the transmission can be made more labor-saving.

[0057] In the previous embodiment, the thrust is indirectly applied to the push rod 22 by means of the pressing portion of the upper shell 11, while in another embodiment, it is conceivable that the thrust can be directly applied to the push rod 22. In this case, the upper shell 11 may only include an upper main shell (not shown in the figure) constructed as a hollow cylinder, without the above-mentioned compressible portion 112 and the pressing portion 111. The upper main shell may have an opening at the top so that a part of the push rod 22, such as the pressure-bearing portion 223, can extend out of the upper main shell. Based on this structure, the user can apply the thrust directly to the push rod 22 to compress the compressible spring 4. Further, in this case, a part of the upper shell 11 can be used as Fig. 9 The locking member 21 in the illustrated embodiment, the corresponding first guide groove 211, the second guide groove 212, the finger-shaped portion 213 and other structural features may be formed on the inner circumferential surface of the upper housing 11. Alternatively, in other embodiments, Figure 8 The locking member 21 in the illustrated embodiment may also be provided in the upper housing 11 as a separate component and connected to the upper housing 11 .

[0058] Furthermore, Fig.10As shown, the outer wall of the upper shell 11 may be provided with a pen clip 113 in the lateral direction, and the pen clip 113 may have a fixed end and a free end, wherein the fixed end is provided at the top of the upper shell 11, and the free end is not connected to any component. The pen clip 113 generally extends downward from the top along the length of the upper shell 11, and there is a clamping gap between the pen clip 113 as a whole and the outer wall of the upper shell 11. The extension of the pen clip 113 is configured so that the clamping gap between the pen clip 113 and the outer wall of the upper shell 11 gradually decreases from top to bottom, that is, the clamping gap between the free end and the outer wall of the shell is the smallest. The free end is configured so that: under the action of external force, the free end can be radially opened outward, so that the clamping gap is further expanded, so that a target fixed object such as a book can be extended into the clamping gap, and the free end can be restored to its original state after the external force is released, so that the spring ballpoint pen can be clamped on the target fixed object.

[0059] Fig.11 is a three-dimensional schematic diagram of the lower shell of the shell assembly according to an embodiment of the present application. Fig.11 As shown, the lower housing 12 as a whole may be, for example, roughly in the shape of a hollow cylinder to provide a receiving space. The lower section of the refill 3 and the support member 13 may be disposed inside the lower housing 12, see Figure 2 and Figure 3 The lower housing 12 may include a body 121 and a nib stopper 122, wherein the body 121 may be in a hollow cylindrical shape, and the cross section of the nib stopper 122 may gradually narrow from top to bottom, and be constructed in a substantially truncated cone shape. The nib is disposed in the nib stopper 122, and the nib may move downward inside the nib stopper under the action of a thrust so that the pen tip extends out of the lower housing.

[0060] Fig.12 FIG. 1 is a perspective schematic diagram of the intermediate sleeve 14 of the housing assembly according to an embodiment of the present application. Fig.12 As shown, the intermediate sleeve 14 may be, for example, in the shape of a hollow cylinder, and the intermediate sleeve 14 may be located inside the upper shell 11, and the intermediate sleeve 14 may have a first threaded connection portion 141 at the lower end, and correspondingly, the upper end of the lower shell 12 may have a second threaded connection portion 123 (see Fig.11 ), so that the lower shell 12 and the intermediate sleeve 14 can be connected together by threaded engagement, and thus the lower shell 12 and the upper shell 11 are docked together to form a complete shell, see Figure 2 and Figure 3 The upper portion of the intermediate sleeve 14 can be used as Fig. 9 The locking member 21 in the illustrated embodiment, the corresponding first guide groove 211, the second guide groove 212, the finger-shaped portion 213 and other structural features may 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 portion 224 of the push rod 22 and the cam rotating member 23 can be arranged in the upper portion of the middle sleeve 14 to achieve locking of the pen tip position.

[0061] As mentioned above, in other embodiments, the upper shell 11 may only include an upper main shell configured as a hollow cylinder without the compressible portion 112 and the push portion 111. In this case, the intermediate sleeve 14 may not be provided between the upper shell 11 and the lower shell 12. One of the upper shell 11 and the lower shell 12 may have a first threaded connection portion, and the other may have a corresponding second threaded connection portion, so that the upper shell 11 and the lower shell 12 may be connected together by engaging the first and second threaded connections.

[0062] Fig.13 is a three-dimensional schematic diagram of a support member of a housing assembly according to an embodiment of the present application. Fig.13 As shown, the support member 13 may be cylindrical, for example, so as to accommodate a portion of the refill 3. The support member 13 may be disposed entirely or at least in part inside the lower housing 12, and 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 rotating member 23 and the other end abuts against the support member 13, that is, the compressible spring 4 is confined between the cam rotating member 23 and the support member 13. When the compressible spring 4 is subjected to the thrust from the cam rotating member 23, since the support member 13 is fixed, the compressible spring 4 is compressed between the cam rotating member 23 and the support member 13.

[0063] In the above-mentioned embodiment, any one or both of the upper shell 11 and the lower shell 12 can be made of a transparent plastic material in part or in whole to form an ultra-transparent pen body structure to enhance the aesthetic appearance of the shell. Any one or more of the various components disposed inside the upper shell 11 and the lower shell 12, such as the various components of the telescopic mechanism, the intermediate sleeve and the supporting member, can be made of a plastic material of any color of green, red, yellow, black, purple, pink, blue and transparent colors.

[0064] In combination with the above embodiments and with reference to Figure 2 and Figure 3 To describe the relative position relationship between the various components of the spring ballpoint pen in the assembled state.

[0065] like Figure 2 and Figure 3As shown, the upper housing 11 is spliced ​​with the lower housing 12 via the intermediate sleeve 14 to form the outer housing of the spring ballpoint pen, the intermediate sleeve 14 is located inside the upper housing 11, and at least the force transmission 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, and the length of the compressible spring 4 integrated at the lower end of the cam rotating member 23 can be sized to extend through the intermediate sleeve 14 and extend 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, thereby the accommodation space formed by the spiral portion of the compressible spring 4 is connected to the inside of the support member 13, thereby forming an internal space for accommodating substantially the entire refill 3, that is, the pen tube. The refill 3 is located in the internal space, and the upper end of the refill 3 abuts against the lower end of the cam rotating member 23, thereby when the cam rotating member 23 moves downward, the refill 3 can move downward under the action of the thrust. The above-mentioned components of the spring ballpoint pen 10 are, from the outside to the inside, an upper shell 11 and a lower shell 12 (the two are in contact with each other and are in an up-and-down relationship), an intermediate sleeve 14, a compressible spring 4 and a supporting member 13 (the two are in contact with each other and are in an up-and-down relationship), and a refill 3.

[0066] The following will refer to the embodiments of the above-mentioned housing assembly and the various parts of the telescopic mechanism and refer to Figure 2 and Figure 3 as well as Figure 8 and Fig. 9 The process and principle of extending and retracting the pen tip into the housing and locking the pen tip in the extended position and the retracted position are described in detail.

[0067] For the extension process of the pen tip:

[0068] Initially (i.e. when the pen tip 31 is locked in the retracted position), the push rod 22 and the cam rotating member 23 are both located in the locking member 21, so that the pen tip 31 is retracted in the lower housing. The relative position relationship of each component in the retracted position is described below in conjunction with the above two embodiments of the locking member 21.

[0069] In the case where the locking member groove of the locking member 21 is configured to be independent of the inner groove 217 of the first guide groove 211, see Figure 8 At this time, the two side walls of the long protrusion 234 of the cam rotating member 23 contact the inner wall of the first guide groove 211, and the engaging inclined surface 235 at the end of the long protrusion 234 engages with the bottom stop inclined surface 216 of the first guide groove 211, and at the same time, the engaging inclined surface 235 can also contact the first tooth inclined surface 226 or the second tooth inclined surface 227 of the push rod 22, because the radial protrusion height of the long protrusion 234 is greater than the thickness of the first tooth inclined surface 226 or the second tooth inclined surface 227. The circumferential protrusion 222 of the push rod 22 is accommodated in the inner groove 217. Fig. 9In the case where the first guide groove 211 of the locking member 21 is used as a locking member groove, the elongated protrusion 234 and the circumferential protrusion 222 are both accommodated in the first guide groove 211, and the side walls 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 portion 236 abuts against the step portion 218, so that the elongated protrusion 234 can no longer move upward along the first guide groove 211. Figure 8 The locking of the position of the pen core by the locking member in the illustrated embodiment is further described.

[0070] The user presses the spring ballpoint pen, thereby directly or indirectly applying a thrust or pressing force to the push rod 22. Under the action of the thrust, the circumferential protrusion 222 of the push rod 22 moves downward along the inner groove 217. Since the first tooth bevel 226 or the second tooth bevel 227 contacts the engaging bevel 235, the push rod 22 can push the cam rotating member 23 to move downward, thereby applying a thrust to the compressible spring 4 and the pen core 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 core 3 abutting against the cam rotating member 23 moves downward under the action of the thrust, so that the pen tip 31 is completely extended out of the lower housing 12. When the pen tip 31 is in the extended position, the cam rotating member 23 is completely moved out of the locking member 21, so that the engaging bevel 235 of the cam rotating member 23 can be subsequently engaged with the second guide groove 212. At the same time, at least a portion of the tooth bevel of the push rod 22 moves out of the locking member 21. When the thrust is released, the cam rotating member 23 on the lower side moves upward due to the upward rebound force of the compressed compressible spring 4; on the upper side, since the engaging bevel 235 is still in contact with the tooth bevel, the cam rotating member 23 will be subjected to the lateral force of the tooth bevel, thereby causing circumferential rotation. In this process, on the one hand, the upward movement of the cam rotating member 23 will gradually bring it closer to the end of the locking member 21, and on the other hand, due to the rotation of the cam rotating member, it will gradually rotate in the circumferential direction from the position aligned with the first guide groove 211 to the position aligned with the second guide groove 212. When aligned with the second guide groove 212, with the upward movement, the engaging bevel 235 of the cam rotating member 23 engages with the second guide groove 212 configured as a cutout, so that the cam rotating member 23 can no longer move upward or rotate circumferentially, so that the pen tip 31 is locked in the extended position, see Figure 3 .

[0071] For the retraction process of the pen tip:

[0072] The retraction process of the pen tip 31 is similar to the extension process, which is actually the cam rotating member 23 switching from the engagement state with the second guide groove 212 to the engagement state with the first guide groove 211, so the description will be appropriately simplified.

[0073] The user applies a thrust, and under the action of the thrust, the push rod 22 and the cam rotating member 23 move downward, so that the engaging bevel 235 of the cam rotating member 23 gradually disengages from the second guide groove 212 of the locking member 21 which is constructed as a cutout. When the user releases the thrust, 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 bevel of the engaging tooth portion 221, will move upward on the one hand and drive the push rod 22 and the pen core 3 to move upward, and on the other hand, it will also rotate circumferentially at the same time. 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 bevel 216, so that the pen tip 31 is locked in the retracted position, see Figure 2 .

[0074] It should be noted that the engaging bevel 235 of the cam rotating member 23 can always keep in contact with the first tooth bevel 226 or the second tooth bevel 227 of the push rod 22, so that the first tooth bevel 226 or the second tooth bevel 227 can apply a downward force to the engaging bevel 235 (when applying a thrust), and apply a lateral force to the engaging bevel 235 to make it rotate in the circumferential direction (after releasing the thrust). In addition, due to the limitation of the inner groove, the push rod 22 can only move linearly along the inner groove without rotating during the whole process.

[0075] In the related art, the compressible spring is usually arranged as a separate component at the bottom of the writing pen, and the thrust needs to be transmitted to the compressible spring through a force transmission member arranged between the telescopic mechanism and the compressible spring, and thus it is usually necessary to set a limiter on the pen core or the force transmission member to limit the compressible spring between the lower end of the shell and the limiter. This arrangement will result in more components required and will also make the distribution of each component more dispersed, resulting in a larger shell space required for accommodation, which is not conducive to the refinement of the writing pen. Compared with the above-mentioned related art, the present application sets the compressible spring at the lower end of the telescopic mechanism and constructs the two as an integral part, thereby reducing the number of required components while achieving basic functions, thereby making the internal structure of the spring ballpoint pen more compact, which helps to make the spring ballpoint pen extremely compact and easy to store and carry.

[0076] Although the present application has been described with reference to exemplary embodiments, it should be understood that the present application is not limited to the specific embodiments described and illustrated in detail above, and that those skilled in the art may make various changes and substitutions to the exemplary embodiments without departing from the scope defined by the claims and the specification.

Claims

1. An ultra-transparent and extremely compact spring ballpoint pen, characterized in that: The spring ballpoint pen (10) comprises a housing assembly (1) and a telescopic mechanism (2). Wherein, the housing assembly (1) is used to accommodate the telescopic mechanism (2) and the pen core (3); and The telescopic mechanism (2) is located at the upper part of the housing assembly (1), and the telescopic mechanism (2) has a compressible spring (4) formed integrally with a part of the telescopic mechanism (2) at the 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 core (3), so that the compressible spring (4) is compressed, and the telescopic mechanism (2) locks the pen tip (31) of the pen core (3) in an extended position and a retracted position by means of the rebound force of the compressible spring (4).

2. The ultra-transparent and extremely compact spring ballpoint pen according to claim 1, characterized in that: The compressible spring (4) is made of plastic material, and has a spiral portion (41), wherein the cross section of the spiral portion (41) is in a flat rectangular shape.

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

4. The ultra-transparent extremely compact spring ballpoint pen according to claim 3, characterized in that: The locking member (21) comprises 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) being arranged alternately with each other along the circumference of the locking member (21), and the length of the first guide grooves (211) is greater than the length of the second guide grooves (212); The push rod (22) has an engaging tooth portion (221) on the lower end surface; the cam rotating member (23) has a clamping portion (231) on the upper end edge, and the clamping portion (231) is configured to contact the engaging tooth portion (221); Wherein, when the clamping portion (231) is engaged with the first guide groove (211), the cam rotating member (23) is in the first engagement state with the locking member (21); when the clamping portion (231) is engaged 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 extremely compact spring ballpoint pen according to claim 4, characterized in that: The engaging tooth portion (221) of the push rod (22) comprises a first tooth bevel (226) and a second tooth bevel (227) which are alternately arranged in the circumferential direction, and the first tooth bevel (226) and the second tooth bevel (227) form a certain angle relative to each other.

6. The ultra-transparent extremely compact spring 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 piece (21) has a plurality of locking piece grooves, each circumferential protrusion (222) being engaged in a corresponding locking piece groove and being able to move along the locking piece groove.

7. The ultra-transparent extremely compact spring ballpoint pen according to claim 6, characterized in that: The push rod (22) comprises a pressure-bearing portion (223) and a hollow columnar force-transmitting portion (224), and the engaging tooth portion (221) and the circumferential protrusion (222) are arranged on the columnar force-transmitting portion (224).

8. The ultra-transparent extremely compact spring ballpoint pen according to claim 7, characterized in that: The push rod (22) further comprises a flange portion (225), wherein the flange portion (225) extends upward from the pressure-bearing portion (223) and is used for connecting to the housing assembly (1).

9. The ultra-transparent extremely compact spring ballpoint pen according to claim 7, characterized in that: The cam rotating member (23) comprises a columnar main body (232) and a columnar guide portion (233) extending upward along the length from the main body (232), the cross-sectional area of ​​the guide portion (233) being smaller than the cross-sectional area of ​​the main body (232), the guide portion (233) being fitted into the columnar force transmission portion (224), and the compressible spring (4) being arranged at the lower end of the main body (232) and extending downward along the length; The clamping portion (231) is configured as a plurality of elongated ridges (234) spaced apart from one another and distributed circumferentially along the main body portion (232); the elongated ridges (234) protrude radially and extend along the length of the main body portion (232).

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

11. The ultra-transparent, extremely compact spring ballpoint pen according to claim 10, characterized in that: The locking member (21) is configured in a hollow cylindrical shape and comprises a plurality of finger-shaped portions (213) distributed circumferentially, each of the finger-shaped portions (213) having a guide slope (214) at an end portion, and two adjacent finger-shaped portions (213) are alternately spaced apart by the first guide groove (211) and the second guide groove (212).

12. The ultra-transparent, extremely compact spring ballpoint pen according to claim 4, characterized in that: The housing assembly (1) comprises an upper housing (11) and a lower housing (12) connected to each other, and a support member (13). The telescopic mechanism (2) is arranged inside the upper shell (11). The support member (13) is located inside the lower shell (12), one end of the support member (13) abuts against the inner wall of the lower shell (12) and the other end abuts against the lower end of the compressible spring (4).

13. The ultra-transparent, extremely compact spring ballpoint pen according to claim 12, characterized in that: The upper shell (11) comprises a push portion (111) and a compressible portion (112) connected to each other, wherein the push portion (111) is connected to the push rod (22) at the inner side of the lower end, and the compressible portion (112) is configured to undergo elastic deformation under the action of a thrust so as to apply a thrust to the push rod (22).

14. The ultra-transparent ultra-compact spring ballpoint pen according to claim 13, characterized in that: The compressible portion (112) of the upper housing (11) is formed as a coil spring.

15. The ultra-transparent, extremely compact spring ballpoint pen according to claim 12, characterized in that: The lower shell (12) comprises a main body (121) and a nib limiting portion (122); the main body (121) is in the shape of a hollow cylinder; and the nib limiting portion (122) is configured such that a cross section gradually narrows from top to bottom.

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

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