Double-ball pen point assembly and writing stationery

Abstract

The utility model discloses a double-ball pen point assembly and writing stationery, and the double-ball pen point assembly comprises an adjuster which is provided with a through hole; a bowl opening is formed in one end of the ball seat, and an ink guiding flow channel is further formed in the ball seat and communicates with the bowl opening; a first ball; a second ball bead; an ink guide core; a reset spring; wherein the first ball bead is arranged in the bowl opening, and the second ball bead is arranged in the ink guiding flow channel and abuts against the first ball bead. The ball seat is arranged on the adjuster, the ink guiding flow channel is communicated with the through hole, the ink guiding core is inserted into the through hole and the ink guiding flow channel, the ink guiding core abuts against the second ball bead, and the ink guiding core is configured to guide ink to flow to the bowl opening; the return spring is disposed in the regulator and is configured to apply an elastic force toward the second ball to the ink guide core. The assembly difficulty of writing stationery is reduced, so that the writing smoothness and the sealing reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of writing tools, and in particular to a double-ballpoint pen tip assembly and writing stationery. Background Art

[0002] Ballpoint pens are categorized by the ink used: oil-based, gel-based, and water-based. Water-based pens have experienced rapid growth in recent years, expanding their market share year by year, due to their low ink viscosity and smooth, effortless writing. However, the applicant has discovered the following issues with water-based pens during use: First, because the viscosity of the ink in water-based pens is generally between 1 and 10 mPa.s, ink leakage is a common problem during quality control. Second, the writing process is easily affected by the quality of the nib, making it difficult to control the uniformity of ink consumption across different products. Third, the ink in water-based pens evaporates easily, requiring the writing instrument itself to be adequately sealed to ensure long-term storage and use.

[0003] Chinese Patent Publication No. CN112092518A discloses a tilting, direct-liquid dual-ballpoint pen assembly and writing pen. This utilizes two upper and lower balls to improve writing smoothness and seal reliability. During assembly, a spring is required between the balls and the ink core to ensure the two balls rest against each other. However, attaching the spring to the ball makes assembly more difficult due to space constraints.

[0004] In view of this, how to design a writing stationery that is easy to assemble to reduce the difficulty of assembly is a technical problem to be solved by this application. Summary of the Invention

[0005] The present application provides a double-ballpoint pen tip and writing stationery, which reduces the difficulty of assembling the writing stationery to meet the needs of improving writing smoothness and sealing reliability.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides a double-ballpoint pen tip, comprising:

[0008] A regulator, wherein the regulator is provided with a through hole;

[0009] A bead seat, one end of which is provided with a bowl mouth, and an ink introduction channel is further provided in the bead seat, the ink introduction channel being connected to the bowl mouth;

[0010] First ball;

[0011] Second ball;

[0012] ink guide core;

[0013] Return spring;

[0014] In which, the first ball is arranged in the bowl mouth, the second ball is arranged in the ink introduction channel and abuts against the first ball; the ball seat is arranged on the regulator, the ink introduction channel is connected to the through hole, the ink guide core is inserted into the through hole and the ink introduction channel, the ink guide core abuts against the second ball, and the ink guide core is configured to guide ink to flow toward the bowl mouth; the return spring is configured to apply an elastic force to the ink guide core toward the second ball.

[0015] Furthermore, the return spring is sleeved on the ink guiding core;

[0016] The end of the through hole away from the ball seat is provided with a first step surface, the ink guiding core is provided with a second step surface, and the return spring is sandwiched between the first step surface and the second step surface.

[0017] Furthermore, a mounting bracket is provided at the end of the regulator away from the ball seat, and the return spring is provided between the mounting bracket and the ink guiding core.

[0018] Furthermore, the ink guide core is provided with a second step surface, the return spring is sleeved on the ink guide core, and the return spring is sandwiched between the second step surface and the mounting bracket;

[0019] Alternatively, the return spring is sandwiched between the end surface of the ink guiding core and the mounting bracket.

[0020] Furthermore, the bead seat includes a mounting seat and a metal tube, the mounting seat is provided with a mounting hole, and the mounting hole is a stepped hole;

[0021] The bowl mouth and the ink introduction channel are provided on the metal tube. The metal tube is inserted into one end of the installation socket, and the regulator is inserted into the other end of the installation socket.

[0022] Furthermore, it also includes a soft rubber sleeve, which is sleeved on the outside of the metal tube; the first end of the soft rubber sleeve wraps the first end of the metal tube and surrounds the outside of the bowl mouth, the second end of the metal tube and the second end of the soft rubber sleeve are inserted into the mounting socket, and the first end of the metal tube and the first end of the soft rubber sleeve are located outside the mounting seat.

[0023] Furthermore, a buffer portion is provided on the inner tube wall of the second end portion of the soft rubber sleeve;

[0024] An end surface of the second end portion of the metal tube abuts against the buffer portion.

[0025] Another embodiment of the present application further provides a writing stationery, comprising an ink tank and the above-mentioned double-ballpoint pen tip assembly, wherein the regulator of the double-ballpoint pen tip assembly is inserted into the ink tank.

[0026] The technical solution of the present application has the following technical effects compared with the existing technology: by arranging a return spring on the regulator, the return spring is used to apply elastic force to the ink guide core, so that when the writing stationery is not in use, the ink guide core relies on the elastic force applied by the return spring to press the second ball, so that the second ball can press the first ball, and the first ball will be close to the edge of the bowl mouth to achieve a good sealing effect. At the same time, the return spring can be installed using the space occupied by the regulator, which reduces the difficulty of assembling the return spring. On the premise of improving writing smoothness and sealing reliability, the assembly difficulty of the writing stationery is reduced to improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A cross-sectional view of an embodiment of the writing stationery of the present application;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure of the double ballpoint pen head assembly;

[0029] Figure 3 for Figure 1 A cross-sectional view of the double ballpoint pen tip assembly;

[0030] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle M region;

[0031] Figure 5 A partial cross-sectional view of another embodiment of the writing stationery of the present application;

[0032] Figure 6 This is a cross-sectional view of an assembly of a bead seat, a ball, and an ink guide core in another embodiment of the writing stationery of the present application;

[0033] Figure 7 for Figure 6 A local enlarged schematic diagram of the middle N area.

[0034] Reference numerals:

[0035] 1. Ink tank;

[0036] 2. Double ballpoint pen tip assembly; 21. Ball holder; 22. Regulator; 23. First ball; 24. Second ball; 25. Ink guide core; 26. Return spring; 27. Mounting bracket;

[0037] 211. Bowl rim; 212. Ink flow channel; 213. Mounting seat; 214. Metal tube; 215. Soft rubber sleeve; 216. Buffering part; 221. Through hole; 251. Second step surface. DETAILED DESCRIPTION

[0038] This application provides a Figures 1-4 As shown, the present application provides a writing tool, including an ink tank 1 and a double-ballpoint pen head assembly 2.

[0039] The double-ballpoint pen tip assembly 2 includes: a regulator 22 , a ball seat 21 , a first ball 23 , a second ball 24 , an ink guide core 25 and a return spring 26 .

[0040] The regulator 22 is provided with a through hole 221; a bowl mouth 211 is provided at one end of the bead seat, and an ink introduction channel 212 is also provided in the bead seat, and the ink introduction channel 212 is connected to the bowl mouth 211; wherein, the first ball 23 is arranged in the bowl mouth 211, and the second ball 24 is arranged in the ink introduction channel 212 and abuts against the first ball 23; the bead seat 21 is arranged on the regulator 22, the ink introduction channel 212 is connected with the through hole 221, the ink guide core 25 is inserted in the through hole 221 and the ink introduction channel 212, the ink guide core 25 abuts on the second ball 24, and the ink guide core 25 is configured to guide ink to flow toward the bowl mouth 211; the return spring 26 is provided on the regulator 22 and is configured to apply an elastic force to the ink guide core 25 toward the second ball 24.

[0041] The regulator 22 is inserted into the ink tank 1 .

[0042] Specifically, during assembly, the first ball 23 is assembled into the bowl rim 211, the second ball 24 is placed into the ink introduction channel 212, and abuts against the first ball 23. The ball holder 21 and the regulator 22 are assembled and connected together, and the ink guide core 25 is inserted into the ink introduction channel 212 and the through-hole 221, with the ink guide core 25 abutting against the second ball 24. Furthermore, when not in use, the return spring 26 presses the ink guide core 25 against the second ball 24, which in turn presses the first ball 23 through the second ball 24, allowing the first ball 23 to seal against the edge of the bowl rim 211, effectively sealing it.

[0043] During the assembly process, since the return spring 26 is assembled on the regulator 22 , the regulator 22 itself has a larger structural size and can provide a larger installation space for installing the return spring 26 , thereby reducing the difficulty of installing the return spring 26 .

[0044] In some embodiments, as Figure 4 As shown, the return spring 26 is sleeved on the ink guide core 25;

[0045] A first step surface is provided at the end of the through hole 221 away from the ball seat 21 , a second step surface 251 is provided on the ink guiding core 25 , and the return spring 26 is sandwiched between the first step surface and the second step surface 251 .

[0046] Specifically, to facilitate installation of the return spring 26, the return spring 26 can be sleeved onto the ink guiding core 25, with the ink guiding core 25 supporting the return spring 26. Furthermore, to ensure that the return spring 26 exerts an elastic force on the ink guiding core 25, a first stepped surface can be provided in the through-hole 221. Correspondingly, a second stepped surface 251 can be provided on the ink guiding core 25, such that the return spring 26 is sandwiched between the first and second stepped surfaces 251.

[0047] In another embodiment, Figure 5 As shown, in order to facilitate the installation of the return spring 26 , the end of the regulator 22 away from the ball seat 21 is further provided with a mounting bracket 27 , and the return spring 26 is provided between the mounting bracket 27 and the ink guiding core 25 .

[0048] Specifically, the mounting bracket 27 is provided at the end of the adjuster 22 , so that the return spring 26 is installed and fixed by the mounting bracket 27 .

[0049] Similarly, the ink guiding core 25 is provided with a second step surface 251, and the return spring 26 is sleeved on the ink guiding core 25. The return spring 26 is clamped between the second step surface 251 and the mounting bracket 27, and the return spring 26 is in a compressed state; alternatively, the return spring 26 is clamped between the end surface of the ink guiding core 25 and the mounting bracket 27, and the return spring 26 is in a compressed state.

[0050] In another embodiment of the present application, Figure 6-Figure 7 As shown, in order to further protect the first ball 23 exposed on the bead seat 21, the bead seat includes a mounting seat 213 and a metal tube 214, the mounting seat 213 is provided with a mounting socket, and the mounting socket is a stepped hole; the metal tube 214 is provided with the bowl mouth 211 and the ink guide channel 212, the metal tube 214 is inserted into one port of the mounting socket, and the regulator 22 is inserted into the other port of the mounting socket.

[0051] Specifically, the first ball 23 and the second ball 24 are installed through the bowl mouth 211 and the ink guide channel 212 formed by the metal tube 214. The metal tube 214 is assembled on the mounting seat 213 and is connected to the regulator 22 through the mounting seat 213.

[0052] In order to protect the first ball 23, the bead seat also includes a soft rubber sleeve 215, which is sleeved on the outside of the metal tube 214; the first end of the soft rubber sleeve 215 wraps the first end of the metal tube 214 and surrounds the outside of the bowl mouth 211, the second end of the metal tube 214 and the second end of the soft rubber sleeve 215 are inserted into the mounting socket, and the first end of the metal tube 214 and the first end of the soft rubber sleeve 215 are located outside the mounting seat 213.

[0053] Specifically, the soft rubber sleeve 215 adopts an elastic tube, and the soft rubber sleeve 215 can wrap and protect the first end of the metal tube 214 located outside the mounting seat 213. The first end of the soft rubber sleeve 215 is wrapped around the outside of the first end of the metal tube 214, and the first end of the soft rubber sleeve 215 is surrounded by the outside of the bowl mouth 211 to provide buffering protection for the bowl mouth 211 of the metal tube 214.

[0054] When the writing tool falls from a height during the writing process, the first end of the soft rubber sleeve 215 can provide cushioning protection for the outer peripheral part of the first end of the metal tube 214, thereby effectively protecting the first ball 23 in the bowl mouth 211, so as to increase the possibility of the first ball 23 being able to roll smoothly in the bowl mouth 211 after falling, thereby improving the reliability of the writing tool.

[0055] At the same time, the second end of the soft rubber sleeve 215 is also located in the mounting seat 213. When it falls, the soft rubber sleeve 215 can produce elastic deformation when it contacts the ground, thereby ensuring that both ends of the metal tube 214 can obtain effective cushioning, reducing the deformation of the metal tube 214 and causing the inability to output ink smoothly, thereby improving the overall protection capability of the metal tube 214 and improving the overall reliability of the writing tool.

[0056] In another embodiment, a buffer portion 216 is further provided on the inner tube wall of the second end portion of the soft rubber sleeve 215 ; the end surface of the second end portion of the metal tube 214 abuts against the buffer portion 216 .

[0057] Specifically, under normal circumstances, when a writing tool falls, it will fall in an inclined posture. In some cases, when a writing tool falls in a substantially vertical position, the first ball 23 may be damaged by directly hitting the ground. To this end, a buffer portion 216 is formed in the inner tube wall of the second end of the soft rubber sleeve 215. The buffer portion 216 supports the end surface of the second end of the metal tube 214. In this way, when the first ball 23 contacts the ground during a vertical fall, the metal tube 214 can compress the buffer portion 216 to cushion the impact, thereby reducing the possibility of the first ball 23 being unable to write due to deformation.

[0058] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A double ballpoint pen tip assembly, characterized in that: include: A regulator, wherein the regulator is provided with a through hole; A bead seat, one end of which is provided with a bowl mouth, and an ink introduction channel is further provided in the bead seat, the ink introduction channel being connected to the bowl mouth; First ball; Second ball; ink guide core; Return spring; In which, the first ball is arranged in the bowl mouth, the second ball is arranged in the ink introduction channel and abuts against the first ball; the ball seat is arranged on the regulator, the ink introduction channel is connected to the through hole, the ink guide core is inserted into the through hole and the ink introduction channel, the ink guide core abuts against the second ball, and the ink guide core is configured to guide ink to flow toward the bowl mouth; the return spring is configured to apply an elastic force to the ink guide core toward the second ball.

2. The double ballpoint pen tip assembly according to claim 1, characterized in that: The return spring is sleeved on the ink guiding core; The end of the through hole away from the ball seat is provided with a first step surface, the ink guiding core is provided with a second step surface, and the return spring is sandwiched between the first step surface and the second step surface.

3. The double ballpoint pen tip assembly according to claim 1, wherein: The end of the regulator away from the ball seat is further provided with a mounting bracket, and the return spring is provided between the mounting bracket and the ink guiding core.

4. The double ballpoint pen tip assembly according to claim 3, characterized in that: The ink guiding core is provided with a second step surface, the return spring is sleeved on the ink guiding core, and the return spring is sandwiched between the second step surface and the mounting bracket.

5. The double ballpoint pen tip assembly according to claim 3, wherein: The return spring is in a compressed state between an end surface of the ink guiding core and the mounting bracket.

6. The double-ballpoint pen tip assembly according to any one of claims 1 to 5, characterized in that: The bead seat includes a mounting seat and a metal tube, the mounting seat is provided with a mounting hole, and the mounting hole is a stepped hole; The bowl mouth and the ink introduction channel are provided on the metal tube. The metal tube is inserted into one end of the installation socket, and the regulator is inserted into the other end of the installation socket.

7. The double ballpoint pen tip assembly according to claim 6, wherein: It also includes a soft rubber sleeve, which is sleeved on the outside of the metal tube; the first end of the soft rubber sleeve wraps the first end of the metal tube and surrounds the outside of the bowl mouth, the second end of the metal tube and the second end of the soft rubber sleeve are inserted into the mounting socket, and the first end of the metal tube and the first end of the soft rubber sleeve are located outside the mounting seat.

8. The double ballpoint pen tip assembly according to claim 7, wherein: A buffer portion is further provided on the inner tube wall of the second end portion of the soft rubber sleeve; An end surface of the second end portion of the metal tube abuts against the buffer portion.

9. A writing stationery, comprising an ink tank, characterized in that: It also includes a double-ballpoint pen tip assembly as described in any one of claims 1 to 8, wherein the regulator of the double-ballpoint pen tip assembly is inserted into the ink tank.

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