Writing instrument in which pen core is projected and retracted by fingertip

Abstract

To provide a writing instrument in which a pen core is projected from and retracted into a pen point inlet / outlet hole by using an operation member with a fingertip of a user.SOLUTION: A guide hole 50 cut in a straight line along the protruding / retracting direction of a pen core is formed in a main body 10 having an empty cylindrical shape, and an operation member 60 is inserted into the cut passage of the guide hole and coupled. The operation member includes a ring surrounding a pen core existing inside the main body, a connection part 62 extending to the outside of one side of the ring, and a touch part 63 integrally formed with the connection part and allowing a fingertip to move up and down like the pen core. The connection part is inserted into a cut-out passage of the guide hole and slides in the cut-out passage by the pressure of the user's fingertip. When the body is coupled to the wire shaft through the screw portion, a receiving groove and a support ring may be formed in the wire shaft, and the support ring may support an inner side of an inner diameter of the screw portion.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a writing implement in which the pen core can be made to appear and disappear with the fingertip, and more specifically to a writing implement in which the pen core can be exposed by lightly pressing an operating member with the fingertip while holding the front part of the writing implement for writing, and the pen core can be automatically returned to the inside of the main body by releasing the fingertip after finishing writing.

[0002] With these structural improvements, the present invention not only makes the pen easier to use, but also reduces production costs by eliminating the need for a complicated knocking structure, and prevents accidental damage to the pen core or clothing. [Background technology]

[0003] Generally, writing instruments for various purposes, including ballpoint pens, are composed of a hollow body containing a pen tip, a spring, and a knock mechanism for extending and retracting the pen tip.The pen tip inside the body is raised and lowered to expose the pen tip to the outside.

[0004] A writing implement equipped with a knock mechanism is provided at the rear end of the body, and the pen tip is exposed to the outside of the body by pressing the knock mechanism. After finishing writing, the knock mechanism is pressed again or a release button is operated, and the pen tip is returned to its original position by the elastic force of the spring.

[0005] In addition, writing instruments that have a structure in which the pen tip is fixed in an exposed state outside the body are attached to the tip of the body with a separate cap to protect the pen tip normally, and when writing is required, the cap must be disassembled before use.

[0006] With such conventional writing implements, after finishing writing, the user must operate the knock mechanism to retract the exposed pen tip into the body, or fit a cap onto the tip of the body to protect the pen tip from damage.

[0007] Therefore, not only is the operation of retracting the pen core inconvenient, but the user also feels burdened by having to always put on a cap to protect the pen core.

[0008] If the pen tip is inadvertently retracted or the writing instrument is dropped without the cap attached to the tip of the writing instrument for protective grip, the pen tip will be damaged and become unusable.

[0009] Furthermore, if the pen is accidentally worn with the pen core exposed to the outside of the pen body, for example by clipping it to a pocket of clothing, the pen core may be damaged, or the ink may damage the clothing as the tactile part of the pen core comes into contact with the clothing for a long period of time.

[0010] Furthermore, if it is necessary to attach a knock mechanism with a relatively complicated structure, not only does this increase the cost of the writing instrument, but it also has the drawback of making the operation uncomfortable. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Republic of Korea Patent Registration No. 10-1269801 [Patent Document 2] Republic of Korea Patent Registration No. 10-1632590 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-111876 Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention aims to solve the problems of the prior art by providing a writing implement in which the pen core can be exposed and written by lightly pressing an operating member with the fingertip while holding the front part of the writing implement, and the pen core automatically returns to the inside of the body when the pressing fingertip is released after writing is finished.

[0013] Another object of the present invention is to provide a writing implement that is easy to use and in which the pen tip can be extended and retracted with the fingertip, eliminating the need to open and close a lid or cap for writing and the need to operate a knock attached to the rear end to retract the pen tip.

[0014] Another object of the present invention is to provide a writing implement in which the pen core can be inserted and retracted by the fingertip, which can overcome the phenomenon that the tip of the body is weakened due to the cut passage formed in the body for fingertip operation and can improve the bonding strength of the tip of the body.

[0015] A further object of the present invention is to provide a writing implement in which the pen tip can be pulled out and retracted with one finger, so as to prevent the pen tip from being damaged or clothes from being stained with ink when the pen tip is inadvertently stored in a pocket or bag without being pulled into the main body.

[0016] A further object of the present invention is to provide a writing instrument that does not require a complicated knock mechanism or cap installation, has a simple pen tip extension / retraction structure, and is easy to operate by allowing the pen tip to be extended / retracted with the fingertip. [Means for solving the problem]

[0017] In order to achieve the above object, the present invention provides a writing implement comprising: a main body (10) having a hollow cylindrical shape and a threaded portion (11) formed around the periphery of the tip; a tip barrel (20) through which a nib entrance / exit hole (22) of the main body (10) passes and which has a female thread (21) formed therein to be fastened to the threaded portion (11); a pen core (30) housed inside the main body (10) and filled with ink with a nib (31) attached to the tip; a return spring (40) elastically installed between the tip barrel (20) and the pen core (30); and an operating member (60) for operating to insert or remove the nib (31) of the pen core (30) from the nib entrance / exit hole (22) that passes through the tip of the tip barrel (20), The main body (10) is formed along the direction in which the pen core (30) protrudes and retracts, and has a guide hole (50) cut out including the threaded portion (11), The tip barrel (20) includes a female thread (21) that can be screwed onto the threaded portion (11) of the main body (10), a nib inlet / outlet hole (22) that allows the nib (31) to enter and exit, a support ring (23) that is pressed into the inner diameter of the threaded portion (11) of the main body (10) to support the threaded portion from the inside, and a receiving groove (24) that is formed between the female thread (21) and the support ring (23) and that receives and engages with 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) and having a diameter larger than the outer diameter of the pen core (30), The operating member (60) is characterized by including a hollow cylindrical ring (61) seated on the upper part of the flange part (32), a connecting part (62) extended to the outside of one side of the ring (61) and sandwiched in the guide hole (50), and a touch part (63) integrally connected to the end of the connecting part (62), protruding outside the main body (10), and allowing the pen tip to be raised and lowered with the fingertip.

[0018] In the present invention, the threaded portion (11) of the main body (10) is inserted into the inside of the receiving groove (24) of the front barrel (20) and coupled together, and at this time the circular wall surface of the inner diameter of the threaded portion (11) is tightly supported in a circular shape by the support ring (23), so the main body (10) and the front barrel (20) are strongly coupled together.

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

[0020] It is also preferable that a fitting groove (71) is dug adjacent to the protrusion (13) and a rubber pad (70) is further attached to the outside of the body (10).

[0021] In addition, anti-slip creases (14) can be formed on both sides of the guide hole (50) formed in the body (10).

[0022] In addition, the rubber pad (70) attached to the outside of the body (10) may also have anti-slip protrusions (72) formed thereon. [Effects of the Invention]

[0023] This invention has the advantage that the user can write by holding the front part of the writing instrument and lightly pressing the operating member with the fingertip to pull the pen tip out of the front barrel, and when the user finishes writing, he or she releases the fingertip that was pressing the operating member, in which case the pen tip automatically returns to the inside of the body without any additional operation.

[0024] Furthermore, with this invention, there is no need to open or close a lid or cap to write, and there is no need to operate the knock attached to the rear end to retract the pen tip.

[0025] In addition, the present invention allows the pen to be stored in a pocket or bag without accidentally pulling the nib into the pen body, preventing damage to the nib and staining of clothing with ink.

[0026] In addition, the present invention does not require the installation of a complex knock mechanism or cap at the rear end of the writing instrument, and has the advantage of a simple pen tip extension / retraction structure that makes operation convenient.

[0027] In addition, in the present invention, during the process of assembling the main body and the tip shaft, the threaded portion of the main body is screwed into the female thread of the tip shaft, and during this process, the threaded portion is inserted into the accommodation groove of the tip shaft and supported by the support ring, so the main body and the tip shaft are firmly joined together, improving the assembly strength and also improving the durability and marketability of the product. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a schematic diagram showing a state in which the writing instrument of the present invention is used. [Figure 2] 1 is a perspective view showing a writing instrument according to the present invention with an operating member raised; [Figure 3] 1 is a perspective view showing a writing instrument according to the present invention with an operating member in a lowered state. [Figure 4] FIG. 2 is a perspective view showing a state in which the operating member of the present invention is attached to a pen core. [Figure 5] 1 is a cross-sectional view showing a state in which the operating member of the present invention is assembled to a writing instrument. [Figure 6] FIG. 10 is an enlarged cross-sectional view showing a state in which the operating member is lowered. [Figure 7] FIG. 10 is a partially enlarged perspective view showing an embodiment in which a rubber pad is coupled to a main body. [Figure 8] FIG. 8 is an exploded perspective view of FIG. 7. [Figure 9] FIG. 8 is a longitudinal cross-sectional view of FIG. [Figure 10] FIG. 10 is a partially enlarged perspective view showing an embodiment in which anti-slip protrusions are formed around the periphery of a rubber pad. [Figure 11] FIG. 10 is a partially enlarged perspective view showing an embodiment in which anti-slip protrusions are formed around the periphery of the main body. [Figure 12] 10 is an enlarged cross-sectional view showing the coupling relationship between the threaded portion, the female threaded portion, and the support ring when the main body and the front barrel are coupled together. FIG. [Figure 13] FIG. 13 is an exploded cross-sectional view of FIG. 12. [Figure 14] FIG. 13 is an enlarged cross-sectional view of part A in FIG. 12. DETAILED DESCRIPTION OF THE INVENTION

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

[0030] The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly indicates otherwise. In this application, terms such as "comprise" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and should be understood not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0031] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, the same or corresponding components will be given the same reference numerals, and redundant description thereof will be omitted.

[0032] As shown in Figure 1, the writing implement of the present invention works by gently pressing the operating member (60) with a fingertip to pull the pen tip (31) out of the main body (10) and begin writing. After writing, the moment the finger is released from the operating member (60), the pen tip (31) automatically returns to the main body (10), making operation easy and the structure simple, reducing manufacturing costs and preventing damage to the pen tip (31) and clothing.

[0033] The main body (10) is hollow and cylindrical, with a male thread (11) formed around the tip, and a clip (12) may be attached to the top to secure the writing implement to a pocket or the like.

[0034] The tip of the tip barrel (20) has a sharp tip and a pen tip inlet / outlet hole (22) through which the pen tip (31) can be inserted and removed. A female screw (21) is formed on the inner diameter, and is screwed onto the threaded portion (11) at the tip of the main body (10) for assembly.

[0035] The tip of the tip barrel (20) has a sharp tip and a pen nib inlet / outlet hole (22) formed therethrough, through which the pen nib (31) can enter and exit. The tip barrel (20) has an internal thread (21) formed on its inner diameter, which is threadedly connected to the threaded portion (11) at the tip of the main body (10), thereby connecting the main body (10) and the tip barrel (20) together.

[0036] When the pen core (30) is filled with ink, writing is performed using the end of the pen tip (31) that is clamped at the tip. The pen core (30) has a flange portion (32) that protrudes outward in a circular shape above the pen tip (31). The flange portion (32) supports the ring (61) of the operating member (60) when the operating member is inserted into the pen core (30).

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

[0038] The guide hole (50) is cut in a straight line in the body (10) in the direction in which the pen core (30) protrudes and retracts, more specifically, in the direction toward the center of the body (10), and is formed up to the threaded portion (11) of the body (10). The operating member (60) is raised and lowered by the guide of the guide hole (50). When the threaded portion (11) forms a spiral connection with the front barrel (20), the cutting of the guide hole (50) may weaken the spiral connection, but this weakness is reinforced by the support ring (23) of the front barrel (20).

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

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

[0041] The connecting part (62) connects the ring (61) and the touch part (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 part (63) is formed to be located outside the main body (10), and is formed in a round shape along the outer periphery of the main body (10), and has a shape that extends in the left and right direction.

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

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

[0045] In addition, the periphery of the touch area (63) forms a smooth arc, which is designed to prevent snagging on clothing or hands when it comes into contact with them.

[0046] At this time, the movement distance of the operating member (60) depends on the length of the guide hole (50) exposed when the tip barrel (20) is screwed 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, taking into account the distance for smooth writing.

[0047] In the present invention, the pen core (30) has a flange (32) formed above the pen tip (31), and the flange (32) has a diameter larger than the outer diameter of the pen core (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 onto the top of the pen core (30), it is secured in a state of hanging on the upper surface of the flange (32). When the user presses the touch part (63) with his / her fingertip to write, the pen core (30) and the pen tip (31) can be lowered together.

[0048] Meanwhile, when the main body 10 and the front shaft 20 are spirally coupled together, the present invention further includes a support ring 23 inside the front shaft 20 to strengthen the spiral coupling, which is one of the technical features of the present invention and will be described 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 barrel (20), and when assembled, the support ring (23) is sandwiched within the inner diameter of the front threaded portion (11) of the main body (10), supporting the threaded portion (11) from within the inner diameter. If the support ring (23) were not present, when the main body (10) and the front barrel (20) were threadedly coupled to each other, the threaded portion (11) would be compressed from above or outside the circle, causing it to shrink inward or toward the inside, resulting in a narrowing of the width of the guide hole (50). Therefore, the support ring (23) prevents the guide hole (50) from narrowing.

[0050] To explain this from another perspective, when the tip barrel (20) and the main body (10) are screwed together, the threaded portion (11) of the main body (10) is engaged with the female thread (21) of the tip barrel (20), and in the process, the threaded portion (11) enters the receiving groove of the tip barrel (20), and the end of the threaded portion (11) of the main body (10) is supported by the support ring (23) inside the receiving groove (24).

[0051] In this case, if the end of the support ring (23) is formed with a sharp cross section, it has the advantage that the threaded portion (11) of the main body (10) can be more easily fitted inside the receiving groove (24).

[0052] Therefore, even when the guide hole 50 is cut in the main body 10, the support ring 23 of the front barrel 20 supports the inner diameter portion of the threaded portion 11 of the main body 10 so that it does not shrink inward, thereby preventing the width of the guide hole 50 from narrowing and preventing frictional resistance or obstruction when the operating member 60 is raised and lowered.In addition, the assembly strength of the main body 10 and the front barrel 20 can be improved.

[0053] The return spring (40) serves to return the pen tip (30) and the operating member (60) back into the main body (10), and its elastic force is designed to be as flexible as possible so that the pen tip (30) returns smoothly.

[0054] Therefore, when pressing the touch part (63) of the operating member (60) with the fingertip while writing, the pen tip (31) and the operating member (60) operate smoothly with minimal pressure, and by pressing the operating member (60) directly with the finger while writing, it is designed to be useful for finger exercise.

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

[0056] Furthermore, when storing the pen in your clothing or pocket, there is no contact with the nib, so you don't have to worry about the ink damaging your clothes.

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

[0058] It is desirable that the body (10) has protrusions (13) formed on both sides of the guide hole (50) to reinforce the strength around the guide hole (50). The protrusions (13) are formed thick so that they protrude around the guide hole (50) (see Figures 7 to 11).

[0059] A guide hole (50) is formed in the center of this protrusion (13), which prevents the connecting part (62) of the operating member (60) from being damaged or deformed due to wear even when it is repeatedly raised and lowered.

[0060] In addition, it is preferable that a rubber pad (70) having a fitting groove (71) corresponding in size and position to the protrusion (13) is further attached to the outside of the body (10) (Fig. 8 and Fig. 9).

[0061] This rubber pad (70) is made of thin rubber material and is double-injected onto the outside of the body (10) or is tightly fastened with its own elasticity, giving the user a soft feel when holding the writing implement in their hand.

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

[0063] It is also possible to repeatedly mold anti-slip creases (14) integrally on both sides of the guide hole (50) molded into the main body (10) as an alternative to rubber pads (Figure 11).

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

[0065] It should be clear that the features of the present invention are applicable to a variety of writing instruments that have a refill and a nib, such as ballpoint pens and highlighters.

[0066] Although the present invention has been described in detail with reference to the specific examples set forth, it will be apparent to those skilled in the art that various modifications and alterations can be made within the scope of the technical concept of the present invention, and it is understood that such modifications and alterations are intended to fall within the scope of the appended claims. [Explanation of symbols]

[0067] 10 Main Unit 11 Threaded part 13 Protrusion 20 front axis 21 Female thread 23 Support ring 24 Storage groove 30 pen nibs 31 Pen Tip 32 Flange 40 return spring 50 Guide Hole 60 Operating member 61 Ring 62 Connecting part 63 Touch section 70 rubber pads

Claims

1. It has a hollow cylindrical shape, a main body (10) having a threaded portion (11) formed around the periphery of the tip; a tip barrel (20) having a female screw (21) formed thereon so as to be fastened to the screw portion (11); a pen core (30) that is housed inside the main body (10) and is filled with ink with a pen tip (31) attached to the tip; a return spring (40) elastically installed between the front barrel (20) and the pen core (30); an operating member (60) for operating the pen tip (31) of the pen core (30) so that it can be inserted into or removed from the pen tip entrance / exit hole (22); In a writing instrument including The main body (10) is formed along the direction in which the pen core (30) protrudes and retracts, and has a guide hole (50) cut out including the screw portion (11), The tip barrel (20) includes the female screw (21) that can be screwed onto the threaded portion (11) of the main body (10), the pen tip inlet / outlet hole (22) that allows the pen tip (31) to enter and exit, a support ring (23) that is pressed into the inner diameter of the threaded portion (11) of the main body (10) to support the threaded portion from the inside, and a receiving groove (24) that is formed between the female screw (21) and the support ring (23) and that receives and engages with 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) and having a diameter larger than the outer diameter of the pen core (30), The operating member (60) is a writing implement characterized in that it comprises a hollow cylindrical ring (61) seated on the upper part of the flange portion (32), a connecting portion (62) extended to the outside of one side of the ring (61) and sandwiched in the guide hole (50), and a touch portion (63) integrally connected to the end of the connecting portion (62), protruding outside the main body (10), and allowing the operating member to be raised and lowered with a fingertip like a pen tip.

2. 2. The writing implement according to claim 1, wherein protrusions (13) are formed on both sides of the guide hole (50) formed in the main body (10) to reinforce the strength.

3. 2. The writing implement according to claim 1, wherein a rubber pad (70) is further attached to the outside of the main body (10), and the rubber pad (70) has a fitting groove (71) dug in correspondence with the position of the protrusion (13).

4. 2. The writing implement according to claim 1, wherein anti-slip creases (14) are formed on both sides of the guide hole (50) formed in the main body (10).

5. 2. The writing implement according to claim 1, wherein the rubber pad (70) attached to the outside of the main body (10) is also formed with anti-slip protrusions (72).

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