A writing instrument where the nib pops in and out with your fingertips.

Abstract

A writing implement in which the user uses an operating member with their fingertip to move the pen tip in and out of the pen tip entrance / exit hole. [Solution] A guide hole (50) is cut in a straight line along the pen tip's insertion / retraction direction in a hollow cylindrical body (10), and an operating member (60) is inserted into the cut passage of the guide hole to couple with it. The operating member includes a ring that encases the pen tip inside the body, a connecting portion (62) extending outward from one side of the ring, and a touch portion (63) that is formed integrally with the connecting portion and allows the user's finger to raise and lower the pen tip like the pen tip. The connecting portion is inserted into the cut passage of the guide hole and slides along the cut passage when the user applies pressure with their fingertip. When coupling with a shaft through the threaded portion of the body, a receiving groove and a support ring are formed inside the shaft, and the support ring supports it on the inner diameter of the threaded portion.

Description

Technical Field

[0001] The present invention relates to a writing instrument in which a pen tip protrudes and retracts with a fingertip. More specifically, in the state of holding the front part of the writing instrument for writing, the operation member is gently pressed with a fingertip so that the pen tip is exposed, and after finishing writing, when the pressed fingertip is released, the pen tip is automatically returned inside the main body. The present invention relates to a writing instrument.

[0002] With such a structural improvement, the present invention can reduce the production cost without the need for a complicated knock structure, together with ease of use, and can prevent damage to the pen tip and clothing due to carelessness.

Background Art

[0003] Generally, writing instruments for various purposes such as ballpoint pens are composed of a pen tip, a spring, and a knock mechanism for operating the protrusion and retraction of the pen tip inside a hollow main body, and the pen tip is exposed to the outside while raising and lowering the pen tip inside the main body.

[0004] A writing instrument equipped with a knock mechanism is provided at the rear end of the main body so that the pen tip is exposed to the outside by a pressing operation, and after finishing writing, the knock mechanism is pressed again or the release button is operated so that the pen tip is returned by the elastic force of the spring.

[0005] In addition, a writing instrument with a structure in which the pen tip is fixed in a state of being exposed to the outside of the main body is assembled to the tip of the main body with another cap, and usually protects the pen tip, and when writing is required, it is used after disassembling the cap.

[0006] For such conventional writing instruments, after finishing writing, the knock mechanism must be operated to draw the exposed pen tip into the main body, or the pen tip must be protected from damage by fitting a cap onto the tip of the main body.

[0007] Therefore, there is not only the inconvenience of the operation for retracting the pen tip, but also the burden of always covering the cap to protect the pen tip.

[0008] If you accidentally retract the nib or drop the writing instrument while it's not properly secured with the cap, the nib will be damaged and the pen will become unusable.

[0009] Furthermore, if the pen tip is exposed to the outside of the body and is accidentally attached to a clothing pocket using a clip, for example, there is a common problem where the pen tip gets damaged, or the pen tip's tactile part comes into prolonged contact with clothing, causing the clothing to be damaged by the ink.

[0010] Furthermore, when it was necessary to install a relatively complex knocking mechanism, it not only increased the cost of the writing instrument but also resulted in drawbacks such as an unpleasant user experience. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Korean Patent Registration No. 10-1269801 [Patent Document 2] Republic of Korea Patent Registration No. 10-1632590 [Patent Document 3] Japanese Patent Publication No. 2005-111876 [Overview of the Initiative] [Problems that the invention aims to solve]

[0012] The present invention aims to solve the problems of conventional writing instruments, and provides a writing instrument in which the pen tip is exposed and writing is performed by lightly pressing an operating member with the fingertip while holding the front of the writing instrument, and when the fingertip is released after writing is finished, the pen tip automatically returns to the inside of the body.

[0013] Another object of the present invention is to provide a writing instrument that eliminates the need to open and close a lid or cap for writing, and does not require operations such as operating a knock attached to the rear end to retract the pen tip, and is easy to use, with the pen tip extending and retracting with the fingertips.

[0014] Another object of the present invention is to provide a writing instrument in which the pen tip can be extended and retracted by the fingertip, which overcomes the phenomenon of the tip of the body weakening due to the incision passage formed in the body for fingertip operation, and improves the bonding force of the tip of the body.

[0015] Another object of the present invention is to provide a writing instrument in which the pen tip can be extended and retracted with one finger, so as to prevent damage to the pen tip or staining of clothing with ink when the pen is stored in a pocket or bag without the pen tip being retracted into the body.

[0016] Another object of the present invention is to provide a writing instrument that does not require a complex knocking mechanism or the installation of a cap, and has a simple and convenient mechanism for extending and retracting the pen tip, allowing the pen tip to be extended and retracted with the fingertips. [Means for solving the problem]

[0017] To achieve the above objective, the present invention provides a writing instrument comprising: a body (10) having a hollow cylindrical shape and having a threaded portion (11) formed around its tip; a front barrel (20) through which the pen tip entrance / exit hole (22) of the body (10) passes and through which a female thread (21) is formed to fasten to the threaded portion (11); a pen nib (30) housed inside the body (10) and filled with ink with a pen tip (31) incorporated at its tip; a return spring (40) elastically positioned between the front barrel (20) and the pen nib (30); and an operating member (60) for operating the pen tip (31) of the pen nib (30) to be extended and retracted through the pen tip entrance / exit hole (22) that passes through the tip of the front barrel (20), wherein The main body (10) is formed along the direction in which the pen tip (30) extends and retracts, and a guide hole (50) is formed by cutting, including the screw portion (11). The front shaft (20) is configured to include a female thread (21) that can be screwed into the threaded portion (11) of the main body (10), a pen tip entrance / exit hole (22) that allows the pen tip (31) to move in and out, a support ring (23) that is pushed into the inner diameter of the threaded portion (11) of the main body (10) to support the threaded portion from the inside, and a housing groove (24) formed between the female thread (21) and the support ring (23) that receives and connects the threaded portion (11). The pen nib (30) is configured to include a flange portion (32) at the upper end of the pen tip (31) that has a diameter larger than the outer diameter of the pen nib (30), The operating member (60) is characterized by comprising a ring (61) which is hollow and cylindrical and is fixed to the upper part of the flange portion (32), a connecting portion (62) which extends to the outside of one side of the ring (61) and is sandwiched in the guide hole (50), and a touch portion (63) which is integrally connected to the end of the connecting portion (62) and protrudes to the outside of the main body (10) so that it can be raised and lowered together with the pen tip by a fingertip.

[0018] In this invention, the threaded portion (11) of the main body (10) is inserted into the housing groove (24) of the front shaft (20) and joined together. At that time, the threaded portion (11) is supported by the support ring (23) in a circular, tightly fitting manner against the circular inner wall surface of the threaded portion (11), so that the main body (10) and the front shaft (20) are strongly joined together.

[0019] In a preferred embodiment of the present invention, when other components such as rubber pads are added to and joined to the main body (10), it is desirable to manufacture the product by forming protrusions (13) on both sides of the guide hole (50) to reinforce its strength.

[0020] Furthermore, it is desirable that a fitting groove (71) be dug adjacent to the projection (13) and that a rubber pad (70) be further attached to the outside of the main body (10).

[0021] Furthermore, anti-slip wrinkles (14) can be formed on both sides of the guide hole (50) that is molded into the main body (10).

[0022] Also, anti-slip protrusions (72) may be formed on the rubber pad (70) coupled to the outside of the main body (10).

Advantages of the Invention

[0023] With this invention, when a user holds the front part of the writing instrument, the user can write by gently pressing the operating member with a fingertip to pull out the pen refill outside the tip shaft. When the user finishes writing, the fingertip pressing the operating member is released, and in that case, the pen refill automatically returns inside the main body without any separate operation.

[0024] Also, with this invention, there is no need to open and close a lid or cap for writing, and operations such as operating a knock attached to the rear end to draw in the pen refill are unnecessary.

[0025] Also, with this invention, it is possible to prevent the case where the pen refill is damaged or clothing is soiled by ink when the pen is stored in a pocket or bag without accidentally drawing the pen refill inside the main body.

[0026] Also, with this invention, there is no need to install a complicated knock mechanism, cap, etc. at the rear end of the writing instrument, and the pen refill protruding and retracting structure is simple and the operation is convenient.

[0027] Also, in the process of assembling the main body and the tip shaft, the screw portion of the main body is screwed with the female screw of the tip shaft, and in that process, the screw portion is inserted into the accommodation groove of the tip shaft and supported by a support ring, so the main body and the tip shaft are strongly coupled and the assembly strength can be improved, and there is also an excellent effect on the durability and commerciality of the product. ]>

Brief Description of the Drawings

[0028] [Figure 1] It is a schematic view showing a state of using the writing instrument of the present invention. [Figure 2] It is a perspective view showing the writing instrument in a state where the operating member of the present invention is raised. [Figure 3] This is a perspective view showing a writing instrument with the operating member of the present invention in a lowered position. [Figure 4] This is a perspective view showing the operating member of the present invention attached to the pen tip. [Figure 5] This is a cross-sectional view showing the operating member of the present invention assembled into a writing instrument. [Figure 6] This is an enlarged cross-sectional view showing the operating member in its lowered position. [Figure 7] This is a partially enlarged perspective view showing an example in which a rubber pad is attached to the main body. [Figure 8] Figure 7 is an exploded perspective view. [Figure 9] Figure 7 is a longitudinal cross-sectional view. [Figure 10] This is a partially enlarged perspective view showing an example in which anti-slip protrusions are molded around the rubber pad. [Figure 11] This is a partially enlarged perspective view showing an example in which anti-slip protrusions are molded around the main body. [Figure 12] This is an enlarged cross-sectional view showing the connection relationship between the screw portion, the female screw portion, and the support ring when the main body and the front shaft are joined. [Figure 13] Figure 12 is a cross-sectional view of the exploded state. [Figure 14] This is an enlarged cross-sectional view of portion A in Figure 12. [Modes for carrying out the invention]

[0029] Because the present invention can be modified in various ways and has diverse embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to be understood to encompass all modifications, equivalents, or substitutes that fall within the spirit and technical scope of the invention. When one component is referred to as being "connected" or "linked" to another component, it should be understood that it may be directly connected or linked to the other component, or that other components may be present in between. On the other hand, when one component is referred to as being "directly connected" or "directly linked" to another component, it should be understood that there are no other components present in between.

[0030] The terms used in this application are used solely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “contains” or “having” are intended to specify the existence of features, numbers, stages, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preemptively exclude the possibility of the existence or addition of one or more other features, numbers, stages, operations, components, parts, or combinations thereof.

[0031] The embodiments will be described in detail below with reference to the attached drawings. Regardless of the reference numerals used in the drawings, identical or corresponding components will be assigned the same reference numerals, and redundant explanations will be omitted.

[0032] As shown in Figure 1, the writing instrument of the present invention is designed so that the pen tip (31) is pulled out from the body (10) by lightly pressing the operating member (60) with a fingertip, allowing writing to take place. After writing, the moment the finger is released from the operating member (60), the pen tip (31) automatically returns to the inside of the body (10), resulting in easy operation, a simple structure, reduced manufacturing costs, and prevention of damage to the pen tip (31) and clothing.

[0033] The main body (10) is a hollow cylinder, with a male screw portion (11) formed around the tip, and a clip (12) for securing the writing instrument to a pocket or the like may be attached to the top.

[0034] The aforementioned front shaft (20) has a sharp tip and a pen tip entrance / exit hole (22) that goes through it, allowing the pen tip (31) to move in and out. An internal thread (21) is formed in the inner diameter and is screwed to a threaded portion (11) provided at the tip of the main body (10) for assembly.

[0035] The tip of the barrel (20) has a sharp tip with a pen tip entrance / exit hole (22) running through it, allowing the pen tip (31) to move in and out through the pen tip entrance / exit hole (22). A female thread (21) is formed on the inner diameter of the barrel (20), and the female thread (21) is screw-connected to a threaded portion (11) provided at the tip of the main body (10), thereby connecting the main body (10) and the barrel (20) to each other.

[0036] The pen nib (30) is filled with ink, and writing takes place at the end of the pen tip (31) that is held in place at its tip. The pen nib (30) has a flange portion (32) that protrudes outward in a circular shape on the upper side of the pen tip (31). The flange portion (32) supports the ring (61) of the operating member (60) when the operating member (60) is inserted into the pen nib (30).

[0037] The return spring (40) is located between the flange portion (32) of the pen tip (30) and the barrel (20), and provides elastic force. The return spring (40) normally pushes the pen tip (30) upward and maintains it in a retracted state inside the main body (10).

[0038] The guide hole (50) is formed by cutting a straight line in the main body (10) in the direction of the pen tip (30) coming in and out, more specifically along the direction of the center of the main body (10), and extends to the threaded portion (11) of the main body (10). The operating member (60) is raised and lowered by the guidance of the guide hole (50). When the threaded portion (11) forms a helical connection with the tip shaft (20), the guide hole (50) is cut open, which may weaken the helical connection, but this weakness is reinforced by the support ring (23) of the tip shaft (20).

[0039] The operating member (60) is made of synthetic resin material and consists of a ring (61) attached to the pen tip (30), a connecting part (62) inserted into the guide hole (50), and a touch part (63) that is exposed to the outside of the main body (10) while connected to the connecting part (62), and moves up and down together with the pen tip (30) with the fingertip.

[0040] The pen tip (30) is inserted inside the ring (61), and the bottom surface of the ring (61) is in contact with the flange portion (32) of the pen tip (30). When force is applied from the outside, the pen tip (30) can be moved downward.

[0041] The connecting portion (62) connects the ring (61) and the touch portion (63) to each other, and when the ring (61) moves up and down along the pen tip (30), it moves up and down along the guide hole (50).

[0042] The touch portion (63) is formed to be located outside the main body (10), and is formed in a rounded shape along the outer circumference of the main body (10), with a shape that extends in the left-right direction.

[0043] The connecting portion (62) is slidably inserted into a guide hole (50) provided at the tip of the main body (10), and by operating the touch portion (63) exposed to the outside of the main body (10) with a fingertip, the ring (61) and the connecting portion (62) can move up and down simultaneously.

[0044] The upper surface of the touch portion (63) forms a plane perpendicular to the center of the main body (10), which serves to prevent slippage when pressing with a fingertip.

[0045] Furthermore, the area around the touch portion (63) forms a smooth arc, designed to prevent snagging when it comes into contact with clothing or hands.

[0046] At this time, the travel distance of the operating member (60) can be raised and lowered according to the length of the guide hole (50) that is exposed when the front shaft (20) is screw-fastened to the main body (10). The pen tip (31) is normally stored inside the main body (10), but when it is fully extended by pressing the touch part (63), a length of 7 to 7.5 mm is appropriate considering the distance at which writing can be performed smoothly.

[0047] In the present invention, the pen nib (30) has a flange portion (32) formed on the upper side of the pen tip (31), and the flange portion (32) is formed with a diameter larger than the outer diameter of the pen nib (30) and larger than the inner diameter of the ring (61) of the operating member. (See Figure 4.) Therefore, when the ring (61) of the operating member (60) is fitted and assembled from the top of the pen nib (30), it is secured in a state where it is resting on the upper surface of the flange portion (32), and when the user presses the touch portion (63) with their fingertip to apply pressure for writing, the pen nib (30) and pen tip (31) can descend together.

[0048] On the other hand, when the main body (10) and the front shaft (20) are helically coupled in the present invention, a support ring (23) is further included inside the front shaft (20) to strengthen the helical coupling. This is one of the technical features of the present invention, and will be explained in more detail below. (See Figures 5, 6, 12 to 14)

[0049] In the present invention, a support ring (23) is integrally formed on the inside of the front shaft (20). In the assembled state, the support ring (23) is sandwiched in the inner diameter of the tip screw portion (11) of the main body (10), supporting the screw portion (11) from the inside of the inner diameter. If the support ring (23) were absent, when the main body (10) and the front shaft (20) were screw-connected to each other, the screw portion (11) would be compressed from the upper side of the circle or the outside of the circle, causing it to shrink inward or into its interior. As a result, the width of the guide hole (50) would narrow. Therefore, the support ring (23) prevents the narrowing of the guide hole (50).

[0050] To explain this from another perspective, when the front shaft (20) and the main body (10) are assembled with screws, the threaded portion (11) of the main body (10) is connected to the female thread (21) of the front shaft (20). In the process, the threaded portion (11) enters the housing groove of the front shaft (20), and the end of the threaded portion (11) of the main body (10) is supported by the support ring (23) inside the housing groove (24).

[0051] In this case, if the end of the support ring (23) is formed with a sharp cross-sectional shape, there is an advantage that the threaded portion (11) of the main body (10) can be more easily connected inside the housing groove (24).

[0052] Therefore, even when the guide hole (50) is cut into the main body (10), the support ring (23) of the front shaft (20) supports the inner diameter of the threaded portion (11) of the main body (10) so as not to shrink inward. This prevents the width of the guide hole (50) from narrowing, and prevents frictional resistance from occurring or being obstructed during the raising and lowering operation of the operating member (60). Furthermore, the assembly strength of the main body (10) and the front shaft (20) can be improved.

[0053] The return spring (40) plays a role in returning the operating member (60) to the inside of the main body (10) together with the pen tip (30), and its elastic force is designed to be as flexible as possible to ensure that the pen tip (30) returns smoothly.

[0054] Therefore, when the touch portion (63) of the operating component (60) is pressed with the fingertip during writing, the pen tip (31) and the operating component (60) operate smoothly with minimal pressure, and the design also helps with finger exercise by directly pressing and operating the operating component (60) with the finger during writing.

[0055] Furthermore, when not writing, the pen tip (31) and pen feed (30) automatically retract into the body (10) and remain stored, preventing damage to the tip of the pen tip (31) even if the writing instrument is accidentally dropped.

[0056] Furthermore, since the pen tip never comes into contact with clothing or pockets, there's no need to worry about ink damaging your clothes.

[0057] In a preferred embodiment, the present invention may include additional configurations to the main body (10).

[0058] It is desirable that the main body (10) has protrusions (13) formed on both sides of the guide hole (50) to be molded, thereby reinforcing the strength around the guide hole (50). The protrusions (13) are molded with increased thickness so that they protrude from the area around the guide hole (50). (See Figures 7 to 11.)

[0059] Since a guide hole (50) is formed in the center of this projection (13), it prevents the connecting portion (62) of the operating member (60) from being damaged by wear or deformed even when it is repeatedly moved up and down.

[0060] Furthermore, it is desirable that a rubber pad (70) having a fitting groove (71) cut into it at a size and position corresponding to the projection (13) be further attached to the outside of the main body (10). (Figures 8 and 9)

[0061] This rubber pad (70) is made of thin rubber material and is attached to the outside of the main body (10) by double injection molding or by being tightly compressed with its own elasticity, providing a soft feel when the user holds the writing instrument in their hand.

[0062] Furthermore, it has the effect of preventing slippage when holding the writing instrument in your hand and pressing the touch part (63) of the operating component (60) with your fingertips while writing, as shown in Figure 1.

[0063] Furthermore, it is also possible to integrally and repeatedly mold anti-slip wrinkles (14) on both sides of the guide hole (50) molded into the main body (10) as a substitute for rubber pads (Figure 11).

[0064] Furthermore, the rubber pad (70) attached to the outside of the main body (10) also has anti-slip protrusions (72) molded into it, which serve to prevent slipping when writing while pressing the touch part (63) of the operating member (60) (Figure 10).

[0065] It should be made clear that a key feature of this invention is its applicability to various writing instruments equipped with a pen tip and a refill, such as ballpoint pens and highlighters.

[0066] Although this invention has been described in detail with respect to specific examples, it will be obvious to those skilled in the art that various modifications and alterations are possible within the scope of the technical concept of this invention, and it is natural that these modifications and alterations are included in the attached claims. [Explanation of symbols]

[0067] 10 Main unit 11 Screw part 13 Protrusion 20 front axis 21 Female thread 23 Support ring 24 storage grooves 30 Pen nibs 31 nibs 32 Flange section 40 Return Spring 50 Guide Hall 60 Operating member 61 Ring 62 Connecting part 63 Touch area 70 Rubber Pads

Claims

1. It has a hollow cylindrical shape, The main body (10) has a threaded portion (11) formed around the tip, A front shaft (20) having an internal thread (21) formed so as to be fastened to the aforementioned threaded portion (11), The pen nib (30), which is housed inside the main body (10) and has a pen tip (31) incorporated into its tip, is filled with ink. A return spring (40) is elastically installed between the front shaft (20) and the pen tip (30), An operating member (60) for operating the pen tip (31) of the pen core (30) so that it can be extended and retracted from the pen tip opening (22), In writing instruments including, The main body (10) is formed along the direction in which the pen tip (30) extends and retracts, and a guide hole (50) is formed, including the screw portion (11), and protrusions (13) are formed on both sides of the guide hole (50) that is formed in the main body (10) to reinforce its strength. The front shaft (20) is configured to include a female thread (21) that can be screwed onto the threaded portion (11) of the main body (10), a pen tip entrance / exit hole (22) that allows the pen tip (31) to move in and out, a support ring (23) that is pushed into the inner diameter of the threaded portion (11) of the main body (10) to support the threaded portion from the inside, and a housing groove (24) formed between the female thread (21) and the support ring (23) that receives and connects the threaded portion (11). The pen core (30) is configured to include a flange portion (32) at the upper end of the pen tip (31) that has a diameter larger than the outer diameter of the pen core (30), The writing instrument is characterized in that the operating member (60) comprises a ring (61) which is hollow and cylindrical in shape and is fixed to the upper part of the flange portion (32), a connecting portion (62) which extends to the outside of one side of the ring (61) and is sandwiched in the guide hole (50), and a touch portion (63) which is integrally connected to the end of the connecting portion (62) and protrudes to the outside of the main body (10) so that it can be raised and lowered by a fingertip like a pen tip.

2. The writing instrument according to claim 1, further characterized in that a rubber pad (70) is attached to the outside of the main body (10), and the rubber pad (70) has a fitting groove (71) carved into it corresponding to the position of the projection (13).

3. The writing instrument according to claim 1, characterized in that anti-slip wrinkles (14) are formed on both sides of the guide hole (50) formed in the main body (10).

4. The writing instrument according to claim 2, characterized in that anti-slip protrusions (72) are also molded into the rubber pad (70) which is attached to the outside of the main body (10).

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