Pencil-shaped writing instruments

Abstract

The present invention relates to a pen tip refill-dropping writing instrument, and more specifically, to a pen tip refill-dropping writing instrument in which the refill-dropping action is achieved by pressing a pen tip for extending and retracting the refill. The writing instrument comprises: a pen body, composed of an upper pen body and a lower pen body; a refill-dropping actuating member, formed on the lower pen body; a refill-dropping gear portion, formed on the lower outer portion of the refill-dropping actuating member; and a locking cap, coupled to the lower portion of the lower pen body. The writing instrument refill-dropping action is achieved by pressing the pen tip of the refill-dropping actuating member. Since the refill-dropping action can be achieved without changing the hand holding the writing instrument, the writing instrument is easy to operate, easy to assemble, and has improved productivity. When the user separates the upper pen body from the lower pen body to replace the refill, the user only needs to extend the refill at its upper end and insert it into the inner side of the upper pen body, thereby facilitating the replacement of the refill.

Description

Technical Field

[0001] The present invention relates to a pen tip drop core type writing tool, and more particularly to a pen tip drop core type writing tool which can complete the drop core action by pressing the pen tip for extending and retracting the pen core. Background Art

[0002] Generally, a pen core type writing instrument extends and retracts a pen core by pressing a pen core rod provided at an upper end.

[0003] This type of writing implement with a drop core has the inconvenience of having to change the state of the hand holding the writing implement in order to perform the drop core action while holding the writing implement.

[0004] Therefore, a writing instrument has been developed that can perform a pen-dropping action by pressing the pen tip, thereby solving the inconvenience of changing the state of the hand holding the writing instrument when performing the pen-dropping action.

[0005] This existing pen tip drop core type writing tool includes: an upper shell formed on the upper part, a lower shell inserted and coupled to the bottom of the upper shell, a drop core operating part that performs a lifting action in the lower shell, a cap coupled to the lower part of the lower shell, and a pen core that is clamped in the drop core operating part and performs a lifting action.

[0006] However, existing writing instruments with pen tips and cores have problems such as complex structures, difficulty in assembly, and reduced productivity.

[0007] In addition, when the user disassembles the writing tool to replace the refill while using it, all the internal parts will fall off, so there is a problem of difficulty in assembling the writing tool without knowing the assembly order and assembly direction, and the disassembled writing tool may be discarded.

[0008] Prior art documents

[0009] Patent documents

[0010] Korean Patent Registration No. 0474391 Summary of the Invention

[0011] Therefore, the present invention is proposed to solve the problems of the above-mentioned existing pen tip drop core type writing instruments, and its purpose is to improve productivity by facilitating assembly and enable general users to easily replace the pen core.

[0012] The present invention comprises: a pen body, which is composed of an upper pen body and a lower pen body; a core-dropping action piece, which is arranged on the lower pen body; a core-dropping gear part, which is inserted into the core-dropping action piece from the upper part; and a locking cap, which is coupled to the lower part of the lower pen body and performs the core-dropping action by pressing the pen head of the core-dropping action piece.

[0013] Specifically, the pen tip drop core type writing tool of the present invention comprises an upper pen body and a lower pen body.

[0014] A buffer spring is provided inside the upper pen body to reduce the impact of the pen core. A pen core fixing piece is provided below the buffer spring. The pen core fixing piece is formed such that the lower part is open for inserting the upper end of the pen core, and an insertion protrusion is formed on the upper part to be strongly coupled to the buffer spring.

[0015] The lower pen body comprises: an upper tube body, the upper portion of which is opened and inserted into the upper pen body; a lower tube body, the lower portion of which is opened and inserted into a core action member and a core gear portion elastically supported by a core spring.

[0016] A hollow spring support plate is formed on the inner side of the upper tube body for the pen core to pass through. The spring support plate is configured to contact the pen core fixing member provided on the inner upper part of the upper pen body and elastically supported by the buffer spring, and the lower part contacts the pen core spring, thereby separating the upper pen body from the lower pen body to couple the pen core.

[0017] A core-falling action member is inserted from the lower portion of the lower tube and elastically supported by a core-falling spring.

[0018] A core-falling gear portion is provided on the outside of the core-falling action piece, which is inserted from the top and meshes with the core-falling action piece to perform the core-falling action.

[0019] A locking cap is provided for limiting the lower part of the pen body, and the locking cap is coupled to the lower part of the lower tube body to prevent the pen head of the pen core action piece from extending and the pen core action piece from being separated.

[0020] Preferably, the core-falling action piece is formed as a tubular body, which is inserted and elastically supported in a manner of being located at the lower part of the core-falling spring, and a pen head is formed at the lower part, and a telescopic hole for the pen tip of the pen core to extend and retract is formed at the pen head. The pen head contacts the ground, and a step portion with a diameter larger than the outer diameter of the core-falling action piece is formed at the upper outer part of the pen head, and four rotating protrusions are protruding at equal intervals on the upper part of the step portion, and two locking protrusions are formed at predetermined intervals on the upper part of the rotating protrusion.

[0021] Preferably, the step portion is formed to have a predetermined width so as to form a lock cap locking surface which is locked to the locking protrusion of the lock cap below.

[0022] Preferably, the core-falling gear portion is composed of a rotation induction gear and a locking gear;

[0023] The rotation induction gear is divided into 8 parts to form gear teeth. When coupled with the core-falling action part, in order to allow the locking protrusion to enter from the upper side of the locking gear, the gear teeth on the opposite sides are formed into insertion grooves that penetrate the locking gear side.

[0024] The locking gear is divided into four parts to form gear teeth, and a locking groove for locking the locking protrusion is formed.

[0025] Preferably, the lower tube body is formed with a supporting boss at a boundary portion with the upper tube body, and the supporting boss supports the upper portion of the core-falling gear portion to prevent it from being contacted and slipped.

[0026] Effects of the Invention

[0027] The present invention can also perform the core-dropping action of the writing tool without changing the state of the hand holding the writing tool, thereby providing convenience in operation.

[0028] In addition, it is easy to assemble and improves productivity.

[0029] In addition, according to the present invention, when the user disassembles the upper pen body and the lower pen body to replace the pen core, only the pen core with the upper end inserted into the interior of the upper pen body is exposed, thereby facilitating replacement of the pen tip.

[0030] In addition, the refill can be replaced without the refill actuating member and the refill gear provided in the lower writing body being exposed to the outside of the lower writing body, thereby eliminating the risk of losing parts due to disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 2 is an exploded diagram of an embodiment of the present invention.

[0032] Figure 2 2 is an example diagram of a combined state according to an embodiment of the present invention.

[0033] Figure 3 FIG. 2 is a partial cross-sectional view illustrating an embodiment of the present invention.

[0034] Figure 4 2 is an exemplary cross-sectional view of an action state according to an embodiment of the present invention.

[0035] Figure 5 This is an example cross-sectional view of the upper pen body and the lower pen body in the separated state according to an embodiment of the present invention.

[0036] Figure 6 2 is an example diagram of the cross section of the upper pen body according to an embodiment of the present invention.

[0037] Figure 7 This is an exemplary cross-sectional view of the state in which the lower pen body is coupled with the pen core gear portion and the lock cap according to an embodiment of the present invention.

[0038] Figure 8 2 is a cross-sectional view of a core-falling gear portion according to an embodiment of the present invention.

[0039] Figure 9 2 is an expanded diagram of a core-falling gear portion according to an embodiment of the present invention.

[0040] In the picture:

[0041] 100: Pen body, 110: Upper pen body, 111: Pen clip, 112: Buffer spring, 113: Pen core fixing part, 113a: Insertion protrusion, 120: Lower pen body, 121: Upper tube body, 121a: Spring support plate, 122: Lower tube body, 123: Pen core spring, 124: Support boss, 200: Pen core action part, 210: Pen tip, 220: Step part, 221: Lock cap locking surface, 230: Rotational protrusion, 240: Locking protrusion, 300: Pen core gear part, 310: Rotational induction gear, 320: Locking gear, 321: Locking groove, 330: Insertion groove, 400: Locking cap, 401: Locking boss, 402: Anti-slip surface DETAILED DESCRIPTION

[0042] Hereinafter, the details will be described with reference to the accompanying drawings.

[0043] The present invention includes: a pen body 100, which is composed of an upper pen body 110 and a lower pen body 120; a core-falling action piece 200, which is arranged on the lower pen body 120; a core-falling gear part 300, which is inserted into the outside of the core-falling action piece 200; and a locking cap 400, which is coupled to the lower part of the lower pen body 120.

[0044] The upper pen body 110 is provided with a pen clip 111 on the outer side.

[0045] The upper pen body 110 is formed with an internal thread for threaded coupling with the lower pen body 120 .

[0046] A buffer spring 112 is provided inside the upper pen body 110 to reduce the impact transmitted to the pen core 1 .

[0047] A refill fixing piece 113 for fixing the upper end of the refill 1 is provided at the lower portion of the buffer spring 112 .

[0048] The refill fixing member 113 is formed as a tube with an open bottom so as to be inserted into the upper end of the refill 1 , and an insertion protrusion 113 a is formed on the upper portion thereof to strongly cooperate with the buffer spring 112 .

[0049] The lower pen body 120 includes an upper tube 121 inserted into the upper pen body 110 and a lower tube 122 into which the pendant action member 200 is inserted.

[0050] The upper tube body 121 and the lower tube body 122 are formed through each other.

[0051] An external thread is formed on the lower outer portion of the upper tube body 121 for threaded coupling with the upper pen body 110 .

[0052] A spring support plate 121a is formed at the inner lower part of the upper tube body 121. The spring support plate is supported by the buffer spring 112 and supports the lower part of the refill fixing part 113 and the upper part of the refill spring 123. It has a hollow structure for inserting the refill 1.

[0053] The lower tube 122 is provided with a core-falling spring 123 . The core-falling spring 123 is inserted into the inner upper portion through the open lower portion and contacts the lower portion of the spring support plate 121 a to elastically support the core-falling actuator 200 .

[0054] The lower tube body 122 is formed with a supporting boss 124 at a boundary portion with the upper tube body 121 . The supporting boss 124 supports the upper portion of the core-falling gear part 300 to prevent it from contacting and slipping.

[0055] The core-falling action piece 200 is formed as a tube body for inserting the pen tip 1, and the upper part of the core-falling action piece is open, and a telescopic hole for extending and retracting the pen tip of the pen core 1 is formed in the lower part, and a pen head 210 that contacts the ground is formed in the lower part.

[0056] The lower outer portion of the pen tip 210 is formed into an arc shape that gradually narrows on the telescopic hole side.

[0057] A step portion 220 having a diameter greater than the outer diameter of the pen-falling actuator 200 is formed on the upper outer side of the pen tip 210 .

[0058] The step portion 220 is formed to have a predetermined width so as to form a lock cap locking surface 221 that is locked to the locking protrusion 401 of the lock cap 400 below.

[0059] Four rotation protrusions 230 are formed on the upper portion of the step portion 220 at equal intervals, and two locking protrusions 240 are formed on the upper portion of the rotation protrusion 230 at a predetermined interval.

[0060] The core-falling gear portion 300 is inserted from the upper portion of the core-falling action member 200 .

[0061] The core-dropping gear unit 300 is composed of a rotation inducing gear 310 and a locking gear 320 .

[0062] The rotation induction gear 310 is divided into 8 parts to form gear teeth. When inserted into the core-falling action part 200, in order to allow the locking protrusion 240 to enter from the upper side of the locking gear 320, the opposite side gear tooth parts are formed into insertion grooves 330 that penetrate toward the side of the locking gear 320.

[0063] The locking gear 320 is divided into four parts to form gear teeth, and a locking groove 321 for locking the locking protrusion 240 is formed.

[0064] The locking cap 400 is coupled to the lower portion of the lower pen body 120 to control the lower portion to prevent the components inserted therein from being disengaged.

[0065] The pen tip 210 of the core-falling action part 200 protrudes through the lock cap 400, and a locking protrusion 401 is formed on the inner lower part of the lock cap for locking the lock cap locking surface 221 of the step part 220 to prevent the core-falling action part 200 from detaching, and an anti-slip surface 401 is formed on the upper part for supporting the bottom of the core-falling gear part 300.

[0066] The operation process of the present invention is described below.

[0067] The present invention includes: a pen body 100, which is composed of an upper pen body 110 and a lower pen body 120; a core-dropping action part 200, which is arranged on the lower pen body 120; a core-dropping gear part 300, which is inserted into the core-dropping action part 200 in a manner of being located at the lower outer part; a locking cap 400, which is coupled to the lower part of the lower pen body 120. By repeatedly pressing the pen tip 210, the core-dropping action part 200 engages with the core-dropping gear part 300 to realize the core-dropping action to complete the extension and retraction action of the pen tip 1, wherein the pen tip 210 is formed at the lower part of the core-dropping action part 200 exposed through the locking cap 400.

[0068] In addition, when the pen tip 210 is pressed toward the ground, the pen tip 210 constituting the core-falling action member 200 supported by the core-falling spring 123 retracts into the locking cap 400. During the retraction of the pen tip 210, the pen refill 1 in contact with the ground is supported by the buffer spring 112. Therefore, it retracts at predetermined intervals along with the pen tip 210 to cushion the impact applied to the ball of the pen refill 1.

[0069] At this time, the core-falling action member 200 rises, the rotating protrusion 230 engages with the rotation inducing gear 310 and rotates a predetermined interval, and then, the locking protrusion 240 of the core-falling action member 200, which is lowered by the elasticity of the core-falling spring 123, engages with the locking gear 320 and is locked in the locking groove 321 to prevent it from falling, thereby executing the extension action of the pen core 1.

[0070] In addition, when the extended pen core 1 is pressed against the ground, the pen core 1 supported by the buffer spring 112 is retracted, and the pen tip 210 of the pen core action member 200 in the retracted state contacts the ground, the pen core action member 200 rises, and the locking protrusion 240 moves upward from the locking groove 321 to release the state of being locked in the locking groove 321 of the locking gear 320. At the same time, the rotating protrusion 230 contacts the rotating induction gear 310 to rotate the pen core gear part 300 by a predetermined angle. When the locking protrusion 240 is located in the space between the gear teeth of the locking gear 320, the pen core action member 200 descends, and the pen tip 210 of the pen core action member 200 in the retracted state extends out from the lower part of the locking cap 400, and the exposed pen core 1 is retracted into the pen tip 210.

[0071] In addition, when the rotating protrusion 230 contacts the rotation inducing gear 310 and rotates the core-dropping gear part 300 , the upper surface of the core-dropping gear part 300 is supported by the supporting boss 124 against the thrust of the rotating protrusion 230 , thereby achieving rotation.

[0072] When the locking protrusion 240 contacts the locking gear 320 to rotate the core-falling gear part 300 , the lower surface of the core-falling gear part 300 abuts against the anti-slip surface 402 and is supported by the thrust of the locking protrusion 240 , thereby achieving rotation.

[0073] That is, the pen core 1 supported by the buffer spring 112 provided on the upper pen body 110 basically does not perform a lifting or telescopic movement, but the pen core action member 200 performs a lifting and lowering movement to repeatedly extend or retract the pen core 1 through the pen head 210.

[0074] In addition, in the process of coupling the core-falling gear part 300 to the core-falling action part 200, the rotation induction gear 310 will be divided into 8 formed gear teeth, and the opposite side gear tooth parts are formed into insertion grooves 33 that penetrate to the side of the locking gear 320, so that the locking protrusion 240 can enter from the upper side of the locking gear 320.

[0075] In addition, the assembly process of the refill 1 is: first assemble the lower pen body 120, insert the upper part of the refill 1 into the refill fixing part 113 formed on the inner upper part of the upper pen body 110, and then, insert the lower part of the refill 1 into the lower pen body 120, so that the writing tool can be easily assembled.

[0076] In addition, when the ink in the refill 1 is used up and needs to be replaced, the refill 1 can be replaced by simply removing the upper pen body 110, thereby preventing the risk of loss due to separation of internal parts.

Claims

1. A pen tip drop core type writing tool, characterized in that: The pen body (100) is composed of an upper pen body (110) and a lower pen body (120). A buffer spring (112) is provided inside the upper pen body (110) to reduce the impact of the pen core (1), and a pen core fixing member (113) is provided at the lower part of the buffer spring (112). The pen core fixing member is formed so that the lower part is open for inserting the upper end of the pen core (1), and an insertion protrusion (113a) is formed on the upper part to be strongly coupled to the buffer spring (112). The lower pen body (120) comprises: an upper tube body (121) with an open upper portion inserted into the upper pen body (110); a lower tube body (122) with an open lower portion inserted into a core-falling action member (200) elastically supported by a core-falling spring (123) and a core-falling gear portion (300). A hollow spring support plate (121a) is formed on the inner side of the upper tube body (121) for the pen core (1) to pass through. The spring support plate (121a) is arranged on the upper inner side of the upper pen body (110) and contacts the pen core fixing member (113) elastically supported by the buffer spring (112), and the lower part contacts the pen core spring (123), thereby separating the upper pen body (110) from the lower pen body (120) to couple the pen core (1); A core-falling action member (200) is inserted from the lower portion of the lower tube (122) and elastically supported by a core-falling spring (123). A core-dropping gear portion (300) is provided on the outer side of the core-dropping action piece (200) and is inserted from the top and meshes with the core-dropping action piece (200) to perform the core-dropping action. A locking cap (400) is provided for restricting the lower portion of the pen body (100), the locking cap being coupled to the lower portion of the lower tube (122) and being used to prevent the pen tip (210) of the pen core action member (200) from extending and the pen core action member (200) from being separated; The core-falling action member (200) is formed as a tubular body, which is inserted into and elastically supported in a manner of being located at the lower part of the core-falling spring (123), and a pen head (210) is formed at the lower part, and a telescopic hole is formed on the pen head for the pen tip of the pen core (1) to extend and retract, and the pen head contacts the ground, and a step portion (220) having a diameter larger than the outer diameter of the core-falling action member (200) is formed on the upper part of the outer side of the pen head (210), and four rotating protrusions (230) are formed at equal intervals on the upper part of the step portion (220), and two locking protrusions (240) are formed at predetermined intervals on the upper part of the rotating protrusion (230).

2. The pen tip drop core type writing tool according to claim 1, characterized in that: The step portion (220) is formed to have a predetermined width, so as to form a locking cap locking surface (221) which is locked to the locking protrusion (401) of the locking cap (400) below.

3. The pen tip drop core type writing tool according to claim 1, characterized in that: The core-dropping gear portion (300) is composed of a rotation induction gear (310) and a locking gear (320); The rotation induction gear (310) is divided into 8 parts to form gear teeth. When coupled with the core dropper (200), in order to allow the locking protrusion (240) to enter from the upper side of the locking gear (320), the gear teeth on both sides opposite to each other are formed into insertion grooves (330) that penetrate toward the side of the locking gear (320). The locking gear (320) is divided into four parts to form gear teeth, and a locking groove (321) is formed for locking the locking protrusion (240).

4. The pen tip drop core type writing tool according to claim 1, characterized in that: The lower tube body (122) is formed with a supporting boss (124) at a boundary portion with the upper tube body (121), and the supporting boss (124) supports the upper portion of the core-falling gear part (300) to prevent contact and slippage.

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